Renin-EASIA KAP1531. DIAsource ImmunoAssays S.A. - Rue du Bosquet, 2 - B-1348 Louvain-la-Neuve - Belgium

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1 ReninEASIA KAP1531 DIAsource ImmunoAssays S.A. Rue du Bosquet, 2 B1348 LouvainlaNeuve Belgium

2 : /1

3 en Read entire protocol before use. RENINEASIA I. INTENDED USE Immunoenzymetric assay for the in vitro quantitative determination of active Renin in human plasma. II. GENERAL INFORMATION A. Proprietary name : DIAsource ReninEASIA Kit B. Catalogue number : KAP1531 : 96 tests C. Manufactured by : DIAsource ImmunoAssays S.A. Rue du Bosquet, 2, B1348 LouvainlaNeuve, Belgium. For technical assistance or ordering information contact : Tel : +32 (0) Fax : +32 (0) III. CLINICAL BACKGROUND Renin, a polypeptidic enzyme (MW~ 40000) (1) also known as angiotensinogenase, is a circulating protease secreted by juxtaglomerular cells in the juxtaglomerular apparatus of the kidneys in response to low blood volume or low body NaCl content. Renin activates the reninangiotensin system by cleaving angiotensinogen produced in the liver into angiotensin I (inactive) which is further converted into angiotensin II (active) in the vascular epithelium of the lung. Angiotensin II can cause vasoconstriction by stimulating the central nervous system, in addition it stimulates ADH (antidiuretic hormone) secretion and aldosterone secretion from the adrenal gland (6). Regulation of blood pressure and renal glomerular filtration control (2) are the most important functions of renin angiotensin system. Plasmatic concentration of renin is influenced by concentration of circulating angiotensinogen and subsequently the concentration of angiotensin II. High plasmatic levels of angiotensin II reduce renin secretion (negative feed back). Determination of renin plasma levels is useful in the diagnosis of hypertension and in the therapeutic follow up of hypertensive patients (3). Plasmatic concentration of renin decreases in patients with hypertension due to a primary hyperaldosteronism (4), contrary to renovascular hypertension (5) where concentrations of renin and aldosterone are both elevated.

4 IV. PRINCIPLES OF THE METHOD The DIAsource ReninEASIA is a solid phase Enzyme Amplified Sensitivity Immunoassay performed on microtiterplates. Calibrators and samples react with the capture monoclonal antibody (MAb 1) coated on microtiter well and with a monoclonal antibody (MAb 2) labelled with horseradish peroxidase (HRP). After an incubation period allowing the formation of a sandwich: coated MAb 1 human Renin MAb 2 HRP, the microtiterplate is washed to remove unbound enzyme labelled antibody. Bound enzymelabelled antibody is measured through a chromogenic reaction. Chromogenic solution (TMB) is added and incubated. The reaction is stopped with the addition of Stop solution and the microtiterplate is then read at the appropriate wavelength. The amount of substrate turnover is determined colourimetrically by measuring the absorbance, which is proportional to the human Renin concentration. A calibration curve is plotted and Renin concentration in samples is determined by interpolation from the calibration curve. V. REAGENTS PROVIDED Ab Reagents Conjugate: HRP labelled antirenin (monoclonal antibodies) in TRIS buffer with bovine serum albumin and thymol CONJ Conjugate buffer: Tris buffer with bovine serum albumin and thymol CAL Microtiterplate with 96 anti Renin monoclonal antibodies coated breakable wells HRP N BUF CONC Calibrators N = 0 to 5, in human serum and thymol. See exact value on vial labels. 96 tests Kit Color Code Reconstitution 96 wells blue Ready for use 1 vial 0.05 ml 1 vial 10.5 ml 6 vials lyophilized yellow red yellow To be diluted with conjugate buffer (see on the label for the exact dilution factor) Ready for use Add 2 ml distilled water 6. Horizontal microtiterplate shaker capable of 400 rpm ± 100 rpm 7. Washer for microtiterplates 8. Microtiterplate reader capable of reading at 450 nm, 490 nm and 650 nm (in case of polychromatic reading) or capable of reading at 450 nm and 650 nm (monochromatic reading) 9. Optional equipment: The ELISAAID necessary to read the plate according to polychromatic reading (see paragraph XI.A.) can be purchased from Robert Maciels Associates, Inc. Mass USA. VII. REAGENT PREPARATION A. Calibrators: Reconstitute the calibrators with 2 ml distilled water.! For a complete solubilisation : after reconstitution, let the vials 30 min on a shaker, then vortex them. B. Controls: Reconstitute the controls with 2 ml distilled water. C Working ReninHRP conjugate : Prepare an adequate volume of conjugate solution by diluting the concentrated ReninHRP conjugate with conjugate buffer. See on the label for the exact dilution factor. Use a vortex to homogenize. Extemporaneous preparation is recommended. D. Working Wash solution : Prepare an adequate volume of Working Wash solution by adding 199 volumes of distilled water to 1 volume of Wash Solution (200x). Use a magnetic stirrer to homogenize. Discard unused Working Wash solution at the end of the day. VIII. STORAGE AND EXPIRATION DATING OF REAGENTS Before opening or reconstitution, all kits components are stable until the expiry date, indicated on the label, if kept at 2 to 8 C. After reconstitution, the calibrators and controls are unstable, use them immediately after reconstitution, freeze them immediately in aliquots and keep them at 20 C for maximum 6 weeks. They are stable after 1 freezethaw cycle. Avoid subsequent freezethaw cycles. Freshly prepared Working Wash solution should be used on the same day. Alterations in physical appearance of kit reagents may indicate instability or deterioration. IX. SPECIMEN COLLECTION AND PREPARATION Samples must be EDTA plasma. If the test is not run within 4 h, plasma should be aliquoted and stored at 20 C. Avoid subsequent freezethaw cycles. Do not use haemolysed samples. CONTROL Controls N = 2 n human serum with thymol. WASH Wash solution (TrisHCl) Chromogenic TMB Solution (Tetramethylbenzydine) Stop solution: HCl 1.0 N 2 vials lyophilized 1 vial 10 ml 1 vial 12 ml 1 vial 12 ml silver brown brown white Add 2 ml distilled water Dilute 200 x with distilled water (use a magnetic stirrer). Ready for use Ready for use Note: 1. Use the zero calibrator for sample dilution pg of the calibrator preparation is equivalent to 2.2 +/ 0.2 µiu of NIBSC 68/356. Values obtained in pg/ml must be multiplied by 2.2 to obtain results in µiu/ml or miu/l. VI. CHROM STOP SOLN N SOLN CONC TMB SUPPLIES NOT PROVIDED The following material is required but not provided in the kit: 1. High quality distilled water 2. Pipettes for delivery of: 25 µl,100 µl, 200 μl and 1 ml (the use of accurate pipettes with disposable plastic tips is recommended) 3. Plastic tubes for dilution of samples 4. Vortex mixer 5. Magnetic stirrer X. PROCEDURE A. Handling notes Do not use the kit or components beyond expiry date. Do not mix materials from different kit lots. Bring all the reagents to room temperature prior to use. Thoroughly mix all reagents and samples by gentle agitation or swirling. Perform calibrators, controls and samples in duplicate. Vertical alignment is recommended. Use a clean plastic container to prepare the Wash Solution. In order to avoid crosscontamination, use a clean disposable pipette tip for the addition of each reagent and sample. For the dispensing of the Chromogenic Solution and the Stop Solution avoid pipettes with metal parts. High precision pipettes or automated pipetting equipment will improve the precision. Respect the incubation times. Prepare a calibration curve for each run, do not use data from previous runs. Dispense the Chromogenic Solution within 15 minutes following the washing of the microtiterplate. During incubation with Chromogenic Solution, avoid direct sunlight on the microtiterplate. B. Procedure. 1. Select the required number of wells for the run. The unused wells should be resealed in the bag with a desicant and stored at 28 C. 2. Secure the wells into the holding frame. 3. Pipette 200 µl of each calibrator, control and sample into the appropriate wells. 4. Incubate for 1 hour at room temperature on a horizontal shaker set at 400 rpm ± 100 rpm. 5. Aspirate the liquid from each well. 6. Wash the plate 3 times

5 7. Pipette 100µl working antireninhrp conjugate into all the wells. 8. Incubate for 1 hour at room temperature on a horizontal shaker set at 400 rpm ± 100 rpm. 9. Aspirate the liquid from each well. 10. Wash the plate 3 times. 11. Pipette 100 µl of the Chromogenic solution into each well within 15 minutes following the washing step. 12. Incubate the microtiterplate for 30 minutes at room temperature, avoid direct sunlight 13. Pipette 100 µl of Stop Solution into each well. 14. Read at 450 nm (reference filter 630 nm or 650 nm) within 1 hour and calculate the results as described in section XI Sample Added Renin Serum RECOVERY TEST Recovered Renin Recovery XI. CALCULATION OF RESULTS DILUTION TEST 1. Read the plate at 450 nm against a reference filter set at 650 nm (or 630 nm). 2. Calculate the mean of duplicate determinations. 3. On semilogarithmic or linear graph paper plot the OD values (ordinate) for each calibrator against the corresponding concentration of Hu Renin (abscissa) and draw a calibration curve through the calibrator points by connecting the plotted points with straight lines. 4. Read the concentration for each control and sample by interpolation on the calibration curve. 5. Computer assisted data reduction will simplify these calculations. If automatic result processing is used, a 4parameter logistic function curve fitting is recommended. XII. TYPICAL DATA The following data are for illustration only and should never be used instead of the real time calibration curve. Hu ReninEASIA OD units Sample Dilution Theoretical Concent /1 1/2 1/4 1/8 1/1 1/2 1/4 1/8 1/16 Samples were diluted with zero calibrator XIV. INTERNAL QUALITY CONTROL Measured Concent Calibrator 0 pg/ml 3.9 pg/ml 11 pg/ml 55 pg/ml 91 pg/ml 270 pg/ml XIII. PERFORMANCE AND LIMITATIONS A. Detection Limit Twenty four zero calibrators were assayed along with a set of other calibrators. The detection limit, defined as the apparent concentration two standard deviations above the average OD at zero binding, was 0.8 pg/ml. B. Specificity The Crossreactivity of Prorenin in this Renin EASIA assay was determined by adding various concentrations of Prorenin to a plasma matrix and by measuring the apparent Renin response. Prorenin crossreactivity was found to be 0.2 %. C. Hemoglobin and bilirubin interferences D Hemoglobin at 7.5 mg/ml and bilirubin at 0.2 mg/lml were tested in Dia source Renin EASIA kit. Results are shown in the table below. No significant interference was found with bilirubin, but hemolytic samples should be avoided. sample Renin value Renin value + Hemoglobin Renin value + Bilirubin Plasma Plasma Plasma Precision INTRA ASSAY Sample N <X> ± SD CV INTER ASSAY Sample N <X> ± SD CV If the results obtained for Control 1 and/or Control 2 are not within the range specified on the vial label, the results cannot be used unless a satisfactory explanation for the discrepancy has been given. If desirable, each laboratory can make its own pools of control samples, which should be kept frozen in aliquots. Controls which contain azide will interfere with the enzymatic reaction and cannot be used. Acceptance criteria for the difference between the duplicate results of the samples should rely on Good Laboratory Practises It is recommended that Controls be routinely assayed as unknown samples to measure assay variability. The performance of the assay should be monitored with quality control charts of the controls. It is good practise to check visually the curve fit selected by the computer. XV. REFERENCE INTERVALS These values are given only for guidance; each laboratory should establish its own normal range of values. Normal range (0.8 to 16.5 pg/ml) has been determined on 20 normal subjects with a mean value of 4.9 pg/ml. XVI. PRECAUTIONS AND WARNINGS Safety For in vitro diagnostic use only. The human blood components included in this kit have been tested by European approved and/or FDA approved methods and found negative for HBsAg, anti HCV, antihiv1 and 2. No known method can offer complete assurance that human blood derivatives will not transmit hepatitis, AIDS or other infections. Therefore, handling of reagents, serum or plasma specimens should be in accordance with local safety procedures. All animal products and derivatives have been collected from healthy animals. Bovine components originate from countries where BSE has not been reported. Nevertheless, components containing animal substances should be treated as potentially infectious. Avoid any skin contact with all reagents, Stop Solution contains H2SO4. In case of contact, wash thoroughly with water. Do not smoke, drink, eat or apply cosmetics in the working area. Do not pipette by mouth. Use protective clothing and disposable gloves. A B ± ± A B ± ± SD : Standard Deviation; CV: Coefficient of variation E Accuracy

6 XVII. BIBLIOGRAPHY XVIII. SUMMARY OF THE PROTOCOL (1) Primary structure of the human Renin gene : Hardman J.A; and al. ; DNA (1984): 3(6): (2) Control of glomerular filtration rate by renninangiotensin system : Hall J. E. and al; Am.J.Physiol. (1977) : 233(5) :F366F372 (3) Raised aldosterone to renine ratio predicts antihypertensive efficacity of spironolactone: a prospective cohort followup study : Lim P.O. and al ; Br. J. Clin. Pharmacol. (1999) : 48(5) : (4) Screening of primary aldosteronism :Schirpenbach C. and al ; Best Pract. Res. Clin. Endocrinol. Metab.(2006) : 20(3) : (5) Diagnostic procedure in renovascular hypertension :Distler A. and al. Clinical nephrology (1991) :36(4): (6) Circulating and tissue angiotensin systems :Campbell D.J. ; J. Clin. Invest. (1987) :79(1) :16 Calibrators (06) Controls, Samples CALIBRATORS (µl) Incubate for 1 hour at room temperature with continuous shaking at 400 rpm. Aspirate the contents of each well. Wash 3 times with 400 µl of Wash Solution and aspirate. 200 SAMPLE(S) CONTROLS (µl) 200 Anti Renin Conjugate Incubate for 1 hour at room temperature with continuous shaking at 400 rpm. Aspirate the contents of each well. Wash 3 times with 400 µl of Wash Solution and aspirate. Chromogenic Solution Incubate for 30 min at room temperature. Stop Solution Read on a microtiterplate reader. Record the absorbance of each well at 450 nm (versus 630 or 650 nm). DIAsource Catalogue Nr : KAP1531 P.I. Number : /en Revision nr : /1 Revision date :

7 fr Lire entièrement le protocole avant utilisation. RENINEASIA I. BUT DU DOSAGE Trousse de dosage immunoenzymatique pour la mesure quantitative in vitro de la rénine active dans le plasma humain. II. INFORMATIONS GÉNÉRALES A. Nom du produit : DIAsource ReninEASIA kit B. Numéro de catalogue : KAP1531 : 96 tests C. Fabriqué par : DIAsource ImmunoAssays S.A. Rue du Bosquet, 2 B1348 LouvainlaNeuve, Belgium. Pour une assistance technique ou une information sur une commande : Tel : +32 (0) Fax : +32 (0) III. CONTEXTE CLINIQUE La rénine, une enzyme polypeptidique (PM ~ 40000) (1) également connue sous le nom d'angiotensinogénase, est une protéase circulante secrétée par les cellules de l'appareil juxtaglomérulaire du rein en réponse à un volume sanguin bas ou un contenu corporel en NaCl faible. La rénine active le système rénineangiotensine en clivant l'angiotensinogène produit par le foie en angiotensine I (inactive) qui est ensuite ellemême convertie en angiotensine II (active) dans l'épithélium vasculaire du poumon. L'angiotensine II peut provoquer une vasoconstriction par stimulation du système nerveux central. De plus, elle stimule la sécrétion d'adh (hormone antidiurétique) et de l'aldostérone par la glande surrénale. (6) La régulation de la pression sanguine et le contrôle de la filtration glomérulaire (2) sont les fonctions les plus importantes du système rénineangiotensine. La concentration plasmatique en rénine est influencée par la concentration en angiotensinogène circulant et, par la suite, par la concentration en angiotensine II. Des taux plasmatiques élevés en angiotensine II réduisent la sécrétion de rénine (rétrocontrôle négatif). La détermination des taux plasmatiques de la rénine est utile dans le diagnostic de l'hypertension et le suivi thérapeutique des patients hypertendus (3). La concentration plasmatique en rénine diminue chez les patients ayant une hypertension due à un hyperaldostéronisme primaire (4), contrairement à l'hypertension rénovasculaire (5) où les concentrations en rénine et en aldostérone sont toutes les deux élevées.

8 IV. PRINCIPE DU DOSAGE VI. MATÉRIELS NON FOURNIS La DIAsource ReninEASIA est une «Enzyme Amplified Sensitivity Immunoassay» en phase solide effectuée sur des microplaques. Les calibrateurs et les échantillons réagissent avec l anticorps de capture monoclonal (AcM 1) recouvrant les puits et avec un anticorps monoclonal (AcM 2) marqué avec la peroxydase (HRP). Après une période d incubation permettant la formation d un sandwich: AcM 1 tapissé Rénine humaine AcM 2 HRP, la microplaque est lavée afin d enlever l anticorps libre marqué enzymatiquement. L anticorps lié marqué enzymatiquement est mesuré avec une réaction chromogénique. Une solution chromogénique (TMB) est ajoutée et incubée. La réaction est arrêtée avec l addition de Solution d arrêt et la microplaque est alors lue à la longueur d onde appropriée. La quantité de remplacement de substrat est déterminée colorimétriquement par la mesure de l absorbance, qui est proportionnelle à la concentration en Rénine humaine. Une courbe de calibration est dessinée et la concentration en Rénine dans les échantillons est déterminée par interpolation de la courbe de calibration. Le matériel mentionné cidessous est requis mais non fourni avec la trousse: 1. Eau distillée d une haute qualité 2. Pipettes pour distribuer: 25 μl, 100 µl, 200 µl et 1 ml (l utilisation de pipettes précises et de pointes en plastique est recommandée) 3. Des tubes en plastique pour la dilution des échantillons 4. Agitateur vortex 5. Agitateur magnétique 6. Agitateur de microplaques horizontal capable de 400 tpm ± 100 tpm 7. Laveur de microplaques 8. Lecteur de microplaques capable de lire à 450 nm, 490 nm et 650 nm (en cas de lecture polychromatique) ou capable de lire à 450 nm et 650 nm (lecture monochromatique) 9. Equipement supplémentaire: le ELISAAID nécessaire à lire la plaque selon la lecture polychromatique (voir paragraphe XI.A.) peut être acheté chez Robert Maciels Associates, Inc. Mass USA. V. RÉACTIFS FOURNIS VII. PRÉPARATION DES RÉACTIFS Ab Réactifs Plaques de microtitration sécable avec 96 puits recouvert d anti Rénine (anticorps monoclonal) HRP CONC Conjugué: antirénine marqué avec de l HRP (anticorps monoclonal) dans un tampon TRIS avec de la sérum albumine bovine et du thymol 96 tests Kit Code Couleur Reconstitution 96 puits bleu Prêt à l emploi 1 flacon 0,05 ml Jaune À diluer avec le tampon du conjugué (voir l'étiquette pour le facteur exact de dilution) A. Calibrateurs : Reconstituer les calibrateurs avec 2 ml d eau distillée.! Pour une solubilisation complète : après reconstitution, laisser les flacons 30 min. sur un agitateur et, ensuite, les passer au vortex. B. Contrôles : Reconstituer les contrôles avec 2 ml d eau distillée. C. Conjugué RénineHRP de travail: Préparer un volume adéquat de conjugué de travail en diluant le conjugué réninehrp concentré avec le tampon du conjugué. Voir l'étiquette pour le facteur exact de dilution. Utiliser un agitateur magnétique pour homogénéiser. Il est recommandé de faire une dilution extemporanée. D. Solution de Lavage : Préparer un volume adéquat de Solution de Lavage en ajoutant 199 volumes d eau distillée à 1 volume de Solution de Lavage (200x). Utiliser un agitateur magnétique pour homogénéiser. Eliminer la Solution de Lavage non utilisée à la fin de la journée. CONJ Tampon du conjugué: un tampon TRIS avec de l'albumine bovine et du thymol CAL Calibrateur N = 0 à 5, dans du sérum humain et du thymol Valeurs exactes sur chaque flacon. CONTROL N BUF Contrôles N = 1 ou 2 dans du sérum humain et du thymol N 1 flacon 10,5 ml 6 flacons lyophilisés 2 flacons lyophilisés Rouge Jaune Gris Prêt à l emploi Ajouter 2 ml d eau distillée Ajouter 2 ml d eau distillée VIII. STOCKAGE ET DATE D EXPIRATION DES RÉACTIFS Avant l ouverture ou la reconstitution, tous les composants de la trousse sont stables jusqu à la date d expiration, indiquée sur l étiquette, si la trousse est conservée entre 2 et 8 C. Après reconstitution, les calibrateurs et les contrôles sont instables. Les utiliser immédiatement après reconstitution, les congeler immédiatement en aliquotes et les maintenir à 20 C pendant maximum 6 semaines. Ils sont stables après 1 cycle de congélationdécongélation. Eviter des cycles de congélation et décongélation successifs. La Solution de Lavage préparée doit être utilisée le jour même. Des altérations dans l apparence physique des réactifs de la trousse peuvent indiquer une instabilité ou une détérioration. WASH Solution de Lavage (TrisHCl) CHROM Solution Chromogène TMB (Tetramethylbenzydine) STOP SOLN TMB SOLN CONC Solution d arrêt: HCl 1,0 N 1 flacon 10 ml 1 flacon 12 ml 1 flacon 12 ml Brun Brun Blanc Diluer 200 x avec de l eau distillée (utiliser un agitateur magnétique). Prêt à l emploi Prêt à l emploi Note : 1. Utiliser le calibrateur zéro pour la dilution des échantillons pg de la préparation du calibrateur est équivalent à 2,2 +/ 0,2 µui de NIBSC 68/356. Les valeurs obtenues en pg/ml doivent être multipliées par 2,2 pour obtenir les résultats en µui/ml ou mui/l. IX. PRÉPARATION ET STABILITÉ DE L ÉCHANTILLON Les échantillons doivent être du plasma prélevé sur EDTA. Si le test n est pas réalisé dans les 4 heures, le plasma doit être aliquoté et conservé à 20 C. Eviter des cycles de congélation et décongélation successifs. Ne pas utiliser d échantillons hémolysés X. MODE OPÉRATOIRE A. Notes de manipulation Ne pas utiliser la trousse ou ses composants après avoir dépassé la date d expiration. Ne pas mélanger du matériel provenant de trousses de lots différents. Mettre tous les réactifs à température ambiante avant utilisation. Mélangez tous les réactifs et les échantillons sous agitation douce. Réaliser les calibrateurs, les contrôles et les échantillons en double. Un alignement vertical est recommandé. Utiliser un récipient en plastic propre pour préparer la Solution de Lavage. Pour éviter toute contamination croisée, utiliser une nouvelle pointe de pipette pour l addition de chaque réactif et échantillon. Pour la distribution de la solution du chromogène et de la solution d arrêt, éviter des pipettes avec des parties en métal. Des pipettes de haute précision ou un équipement de pipetage automatique permettent d augmenter la précision. Respecter les temps d incubation. Préparer une courbe d étalonnage pour chaque nouvelle série d expériences, ne pas utiliser les données d expériences précédentes. Distribuer la solution du chromogène dans les 15 minutes après le lavage de la plaque de microtitration. Éviter exposition à la lumière du soleil lors de l incubation avec la solution du chromogène.

9 B. Mode opératoire 1. Sélectionner le nombre de barrettes nécessaires pour le test. Les barrettes inutilisées doivent être cachetées de nouveau dans le sachet avec un dessiccateur et gardées à 28 C. 2. Placer les barrettes dans le support. 3. Pipeter 200 µl de chaque Calibrateur, Contrôle et Échantillon dans les puits appropriés. 4. Incuber pendant 1 heure à température ambiante sur un agitateur horizontal mis à 400 tpm ± 100 tpm. 5. Aspirer le liquide de chaque puits. 6. Laver la plaque 3 fois. 7. Pipeter 100 µl du conjugué RénineHRP de travail dans tous les puits. 8. Incuber pendant 1 heure à température ambiante sur un agitateur horizontal mis à 400 tpm ± 100 tpm. 9. Aspirer le liquide de chaque puits. 10. Laver la plaque 3 fois. 11. Pipeter 100 µl de la solution chromogène dans chaque puits dans les 15 minutes après la phase de lavage. 12. Incuber la microplaque pendant 30 minutes à température ambiante, éviter exposition à la lumière du soleil. 13. Pipeter 100 µl de la Solution d arrêt dans chaque puits. 14. Lire les absorbances à 450 nm (filtre de référence 630 nm ou 650 nm) endéans l heure et calculer les résultats comme décrits dans la section XI. XI. CALCUL DES RÉSULTATS 1. Lire la plaque à 450 nm contre un filtre de référence mis à 650 nm (ou 630 nm). 2. Calculer la moyenne de chaque détermination réalisée en double. 3. Dessiner sur un graphique linéaire ou semilogarithmique les cpm (ordonnées) pour chaque calibrateur contre la concentration correspondante en rénine humaine (abscisses) et dessiner une courbe de calibration à l aide des points de calibration, en connectant les points avec des lignes droites. 4. Lire la concentration pour chaque contrôle et échantillon par interpolation sur la courbe de calibration. 5. L analyse informatique des données simplifiera les calculs. Si un système d analyse de traitement informatique des données est utilisé, il est recommandé d utiliser la fonction «4 paramètres» du lissage de courbes. XII. DONNÉES TYPES Les données représentées cidessous sont fournies pour information et ne peuvent jamais être utilisées à la place d une courbe d étalonnage. Calibrateur ReninEASIA 0 pg/ml 3,9 pg/ml 11 pg/ml 55 pg/ml 91 pg/ml 270 pg/ml XIII. PERFORMANCE ET LIMITES 0,074 0,121 0,2 0,68 1,068 2,6 Unités OD A. Sensibilité Vingtquatre calibrateurs zéro ont été testés en parallèle avec un assortiment d autres calibrateurs. La limite de détection, définie comme la concentration apparente située 2 déviations standards audessus de la moyenne DO déterminée à la fixation zéro, était de 0,8 pg/ml. B. Spécificité La réactivité croisée de la prorénine dans l'essai Renin EASIA a été déterminée en ajoutant différentes concentrations en prorénine à une matrice de plasma et en mesurant la réponse apparente de la rénine. La réactivité croisée de la prorénine s'est avéré être de 0,2%. C. Interférences de l'hémoglobine et de la bilirubine L'hémoglobine à 7,5 mg/ml et la bilirubine à 0,2 mg/ml ont été testées avec la trousse Renin EASIA de Diasource. Les résultats sont repris dans le tableau cidessous. Aucune interférence significative n'a été trouvée avec la bilirubine, mais il faut éviter d'utiliser les échantillons hémolytiques. D. Précision INTRAESSAI Échantillon N <X> ± SD A B ,7 ± 0,9 67,3 ± 1,5 CV 5,4 2,2 INTERESSAI Échantillon N <X> ± SD A B SD : Déviation Standard; CV: Coefficient de variation E. Exactitude Échantillon TEST DE RECUPERATION Rénine ajoutée Sérum 37,1 78,0 131,2 228,5 Rénine récupérée 38,0 62,0 109,1 241,5 TEST DE DILUTION Echantillon Dilution Concent. théorique 1 2 1/1 1/2 1/4 1/8 1/1 1/2 1/4 1/8 1/16 53,6 24,2 11,1 52,9 26,4 13,2 6,6 Les échantillon ont été dilués avec le calibrateur zéro. XIV. CÔNTROLE DE QUALITÉ INTERNE 103,8 51,9 25,9 12,9 16,8 ± 1,1 64,6 ± 2,2 CV 6,2 3,3 Récupération 102,4 79,5 83,2 105,7 Concent. Mesurée 105,8 51,6 26,6 13,8 5,5 Si les résultats obtenus pour le(s) contrôle(s) 1 et/ou 2 ne sont pas dans l intervalle spécifié sur l étiquette du flacon, les résultats ne peuvent pas être utilisés à moins que l'on ait donné une explication satisfaisante de la nonconformité. Chaque laboratoire est libre de faire ses propres stocks d échantillons contrôles, lesquels doivent être congelés aliquotés. Des contrôles qui contiennent de l azoture influenceront la réaction enzymatique et ne peuvent pas être utilisés. Les critères d acceptation pour les écarts des valeurs en duplicate des échantillons doivent être basés sur les pratiques de laboratoire courantes. On recommande que les contrôles soient testés de façon routinière comme des échantillons inconnus pour mesurer la variabilité du test. La réalisation du test doit être suivie avec des fichiers de contrôle de qualité des contrôles. On recommande de vérifier visuellement la courbe sélectionnée par l ordinateur. XV. échantillon Valeur de la rénine VALEURS ATTENDUES Valeur de la rénine + hémoglobine Valeur de la rénine + bilirubine Plasma 1 12,8 7,5 13,1 Plasma 2 62,7 41,0 60,0 Plasma 3 10,8 7,1 11,7 Les valeurs sont donnés à titre d information; chaque laboratoire doit établir ses propres écarts de valeurs. La fourchette des valeurs normales (0,8 à 16,5 pg/ml) a été déterminée sur 20 sujets normaux avec une moyenne de 4,9 pg/ml.

10 XVI. PRÉCAUTIONS ET AVERTISSEMENTS Sécurité Pour utilisation en diagnostic in vitro uniquement. Les composants de sang humain inclus dans ce kit ont été évalués par des méthodes approuvées par l Europe et/ou la FDA et trouvés négatifs pour HBsAg, l antihcv, l antihiv1 et 2. Aucune méthode connue ne peut offrir l'assurance complète que des dérivés de sang humain ne transmettront pas d hépatite, le sida ou toute autre infection. Donc, le traitement des réactifs, du sérum ou des échantillons de plasma devront être conformes aux procédures locales de sécurité. Tous les produits animaux et leurs dérivés ont été collectés d'animaux sains. Les composants bovins proviennent de pays où l ESB n'a pas été détectée. Néanmoins, les composants contenant des substances animales devront être traités comme potentiellement infectieux. Éviter le contact de la peau avec tous les réactifs, la solution d'arrêt contient du HCl. En cas de contact, laver avec beaucoup d eau. Ne pas fumer, ni boire, ni manger ni appliquer de produits cosmétiques dans les laboratoires. Ne pas pipeter avec la bouche. Utiliser des vêtements protecteurs et des gants à usage unique. XVIII. RÉSUMÉ DU PROTOCOLE Calibrateurs (05) Contrôles, Échantillons CALIBRATEURS (µl) 200 ÉCHANTILLON(S) CONTRÔLES (µl) 200 Incuber pendant 1 heure à température ambiante avec agitation continue à 400 tpm. Aspirer le contenu de chaque puits. Laver 3 fois avec 400 µl de la Solution de Lavage et aspirer. Conjugué antirénine Incuber pendant 1 heure à température ambiante avec agitation continue à 400 tpm. Aspirer le contenu de chaque puits. Laver 3 fois avec 400 µl de la Solution de Lavage et aspirer. XVII. BIBLIOGRAPHIE (1) Primary structure of the human Renin gene : Hardman J.A; and al. ; DNA (1984): 3(6): (2) Control of glomerular filtration rate by renninangiotensin system : Hall J. E. and al; Am.J.Physiol. (1977) : 233(5) :F366F372 (3) Raised aldosterone to renine ratio predicts antihypertensive efficacity of spironolactone: a prospective cohort followup study : Lim P.O. and al ; Br. J. Clin. Pharmacol. (1999) : 48(5) : (4) Screening of primary aldosteronism :Schirpenbach C. and al ; Best Pract. Res. Clin. Endocrinol. Metab.(2006) : 20(3) : (5) Diagnostic procedure in renovascular hypertension :Distler A. and al. Clinical nephrology (1991) :36(4): (6) Circulating and tissue angiotensin systems :Campbell D.J. ; J. Clin. Invest. (1987) :79(1) :16 Solution du chromogène Incuber pendant 30 min à température ambiante. Solution d arrêt Lire sur un lecteur de microplaques. Enregistrer l absorbance de chaque puits à 450 nm (contre 630 ou 650 nm). DIAsource Catalogue Nr : KAP1531 P.I. Number : /fr Revision nr : /1 Date de révision :

11 it Prima di utilizzare il kit leggere attentamente le istruzioni per l uso Renin EASIA I. USO DEL KIT Kit immunoenzimetrico per la determinazione quantitativa in vitro della Renina attiva in plasma umano. II. INFORMAZIONI DI CARATTERE GENERALE A. Nome commerciale: DIAsource ReninEASIA Kit B. Numero di catalogo: KAP1531: 96 test C. Prodotto da: DIAsource ImmunoAssays S.A. Rue du Bosquet, 2, B1348 LouvainlaNeuve, Belgio. Per informazioni tecniche o su come ordinare il prodotto contattare: Tel: +32 (0) Fax: +32 (0) III. INFORMAZIONI CLINICHE La renina, un enzima polipeptidico (MW~ 40000) (1) altrimenti denominato angiotensinogenasi, è una proteasi circolante la cui secrezione da parte delle cellule juxtaglomerulari site nell apparato juxtaglomerulare del rene avviene in risposta ad un volume ematico ridotto o a una ridotta presenza di NaCl nell organismo. La renina attiva il sistema reninaangiotensina convertendo l angiotensinogeno prodotto nel fegato in angiotensina I (inattiva) che viene a sua volta convertita in angiotensina II (attiva) nell epitelio vascolare del polmone. L angiotensina II può causare vasocostrizione agendo sul sistema nervoso centrale, nonché stimolare la secrezione di ADH (ormone antidiuretico) e quella di aldosterone da parte della ghiandola surrenale (6). La regolazione della pressione arteriosa e il controllo della filtrazione glomerulare renale (2) costituiscono le principali funzioni del sistema reninaangiotensina. La concentrazione plasmatica di renina è influenzata dalla concentrazione dell angiotensinogeno circolante e conseguentemente dalla concentrazione di angiotensina II. Elevati livelli plasmatici di angiotensina II riducono la secrezione di renina (feedback negativo). La determinazione dei livelli plasmatici di renina è utile nelle diagnosi di ipertensione e nel follow up terapeutico del paziente iperteso (3). Nei pazienti con ipertensione dovuta a iperaldosteronismo primario (4) è evidenziabile una riduzione della concentrazione plasmatica di renina, contrariamente a quanto avviene in caso di ipertensione renovascolare (5) ove è riscontrabile un aumento sia dei livelli di renina che di aldosterone.

12 IV. PRINCIPIO DEL METODO DIAsource ReninEASIA è un immunosaggio a sensibilità amplificata a fase solida eseguito su piastre di microtitolazione. I calibratori e i campioni reagiscono con la cattura dell anticorpo monoclonale (MAb 1) che riveste il pozzetto di microtitolazione e con un anticorpo monoclonale (MAb 2) marcato con horseradish perossidasi (HRP). Dopo un periodo di incubazione che consenta la formazione di un sandwich: MAb 1 di rivestimento Renina umano MAb 2 HRP, la piastra di microtitolazione viene lavata per rimuovere l anticorpo marcato con enzima non legato. L anticorpo marcato con enzima non legato viene misurato attraverso una reazione cromogenica. Si procede quindi con l aggiunta della soluzione cromogena (TMB) e successiva incubazione. La reazione viene interrotta con l aggiunta di Soluzione di arresto; quindi la piastra di microtitolazione viene letta alla lunghezza d onda adeguata. La quantità di turnover del substrato viene determinata colorimetricamente misurando l assorbanza che è proporzionale alla concentrazione di Renina umano. Viene tracciata una curva di calibrazione e la concentrazione Renina nei campioni viene determinata per interpolazione dalla curva di calibrazione. V. REATTIVI FORNITI Reattivi Kit da 96 test Coniugato: marcato HRP antirenina (Anticorpi monoclonali) in tampone TRIS con albumina di siero bovino e timolo Tampone del coniugato: tampone TRIS con albumina di siero bovino e timolo Calibratore 05, in siero umano con timolo. Le concentrazioni esatte degli calibratore sono riportate sulle etichette dei flaconi. Controlli: N = 1 o 2, in siero umano con timolo Tampone di lavaggio (TRIS HCl) Soluzione Cromogena TMB (tetrametilbenzidina) Soluzione di arresto: HCl 0,1N Codice colore Volume di ricostituzione 96 pozzetti Blu Pronte per l uso 1 flacone 0,05 ml 1 flacone 10,5 ml 6 flaconi liofiliz. 2 flaconi liofiliz. 1 flacone 10 ml 1 flacone 12 ml 1 flacone 12 ml Giallo Rosso Giallo Argento Bruno Bruno Bianco Da diluire con il tampone del coniugato (consultare l etichetta per calcolare il fattore di diluizione esatto) Pronto per l uso Aggiungere 2 ml di acqua distillata Aggiungere 2 ml di acqua distillata Diluire 200 x con acqua distillata (usando un agitatore magnetico) Pronto per l uso Pronto per l uso Note: Usare zero Calibratore per diluire i campioni. 1 pg dela calibratore preparazione è equivalente a 2,2 +/ 0,2 µiu NIBSC 68/356. Valori ottenuti in pg/ml devono essere moltiplicati per 2,2 alfine di ottenere risultati in µiu/ml o miu/l. VI. WASH Ab Piastra di microtitolazione con 96 pozzetti separabili, rivestiti anti Renina (anticorpi monoclonali) CONJ CAL SOLN HRP CONTROL CHROM STOP BUF N N CONC TMB SOLN CONC REATTIVI NON FORNITI Il seguente materiale è richiesto per il dosaggio ma non è fornito nel kit. 1. Acqua distillata di qualità elevata 2. Pipette per dispensare 25 µl, 100 µl, 200 µl e 1 ml (Si raccomanda di utilizzare pipette accurate con puntale in plastica monouso). 3. Provette di plastica per la diluizione dei campioni. 4. Agitatore tipo vortex. 5. Agitatore magnetico. 6. Agitatore orizzontale per piastre da microtitolazione, che raggiunga 400 rpm ± 100 rpm 7. Lavatrice per piastra di microtitolazione 8. Lettore di piastre per microtitolazione con letture a e 650 nm (in caso di lettura policromatica) o con letture a 450 e 650 nm (lettura monocromatica) 9. Strumentazione opzionale: ELISAAID necessario per la lettura policromatica delle piastre (vedi paragrafo XI.A.) può essere acquistato presso Robert Maciels Associates, Inc. Mass USA VII. PREPARAZIONE DEI REATTIVI A. Calibratore: Ricostituire i calibratori con 2 ml di acqua distillata.! Per una solubilizzazione completa: dopo la ricostituzione, lasciare le provette su un agitatore per 30 minuti, quindi vortexarle. B. Controlli: Ricostituire i controlli con 2 ml di acqua distillata. C. Soluzione di lavoro del coniugato ReninaHRP: Preparare la quantità necessaria di soluzione del coniugato diluendo il coniugato ReninaHRP concentrato con il tampone del coniugato. Consultare l etichetta per calcolare il fattore di diluizione esatto. Utilizzare un vortex per omogeneizzare. Si raccomanda la preparazione estemporanea. D. Soluzione di lavoro del tampone di lavaggio: Preparare la quantità necessaria di soluzione di lavoro del tampone di lavaggio aggiungendo 199 parti di acqua distillata ad una parte di tampone di lavaggio concentrato (200x). Usare un agitatore magnetico per rendere la soluzione omogenea. La soluzione di lavoro va scartata al termine della giornata. VIII. CONSERVAZIONE E SCADENZA DEI REATTIVI I reattivi non utilizzati sono stabili a 28 C fino alla data riportata su ciascuna etichetta. Dopo ricostituzione, calibratori e controlli sono molto instabili, utilizzarli immediatamente dopo ricostituzione, congelarli immediatamente in aliquote e mantenerli a 20 C per 6 settimane. Rimangono stabili dopo un ciclo di congelamento/scongelamento. Evitare ripetuti cicli di congelamentoscongelamento dei campioni. La soluzione di lavoro del tampone di lavaggio deve essere preparata fresca ogni volta e usata nello stesso giorno della preparazione. Alterazioni dell aspetto fisico dei reattivi possono indicare una loro instabilità o deterioramento. IX. RACCOLTA E PREPARAZIONE DEI CAMPIONI I campioni devono essere costituiti da plasma trattato con EDTA. Qualora il test non dovesse essere effettuato entro 4 ore, il plasma dovrà essere suddiviso in aliquote e conservato a 20 C. Evitare ripetuti cicli di congelamentoscongelamento dei campioni. Non usare campioni emolizzati. X. METODO DEL DOSAGGIO A. Avvertenze generali Non usare il kit o suoi componenti oltre la data di scadenza. Non mescolare reattivi di lotti diversi. Prima dell uso portare tutti i reattivi a temperatura ambiente. Mescolare delicatamente i campioni per inversione o rotazione. Eseguire calibratori, controlli e campioni in doppio. Si raccomanda l allineamento verticale. Utilizzare un contenitore di plastica pulito per preparare la soluzione di lavaggio. Per evitare crosscontaminazioni, cambiare il puntale della pipetta ogni volta che si usi un nuovo reattivo o campione. Per la distribuzione della soluzione cromogena e la Stop Solution evitare pipette con parti metalliche. L uso di pipette ben tarate e ripetibili o di sistemi di pipettamento automatici migliora la precisione del dosaggio. Rispettare i tempi di incubazione. Allestire una curva di calibrazione per ogni seduta analitica, in quanto non è possibile utilizzare per un dosaggio curve di calibrazione di sedute analitiche precedenti. Distribuzione della soluzione cromogena entro 15 minuti dopo il lavaggio della piastra di microtitolazione. Durante l incubazione con la soluzione cromogena evitare la luce diretta del sole sulla piastra di microtitolazione. B. Metodo del dosaggio 1. Selezionare il numero di strisce reagenti necessario per il test. Le strisce reagenti inutilizzate devono essere risigillate nel contenitore con un essiccante e conservate a 28 C. 2. Assicurare le strisce reagenti nel telaio di supporto. 3. Pipettare 200 µl di ogni calibratore, controllo e campione nei pozzetti adeguati.

13 4. Incubare per 1 ora a temperatura ambiente su un agitatore orizzontale impostato a 400 rpm ± 100 rpm. 5. Aspirare il liquido da ogni pozzetto. 6. Lavare la piastra 3 volte. 7. Pipettare 100 µl della soluzione di lavoro del coniugato ReninaHRP in tutti i pozzetti. 8. Incubare per 1 ora a temperatura ambiente su un agitatore orizzontale impostato a 400 rpm ± 100 rpm. 9. Aspirare il liquido da ogni pozzetto. 10. Lavare la piastra 3 volte. 11. Pipettare in ogni pozzetto 100 µl di Soluzione Cromogena entro 15 minuti dal termine della fase di lavaggio. 12. Incubare la piastra di microtitolazione per 30 minuti a temperatura ambiente; evitare la luce diretta del sole. 13. Pipettare 100 µl di soluzione di arresto in ogni pozzetto. 14. Leggere le assorbanze a 450 nm (filtro di riferimento a 630 nm o 650 nm) entro un ora e calcolare i risultati come descritto nella sezione XI. XI. CALCOLO DEI RISULTATI 1. Leggere la piastra a 450 nm rispetto a un filtro di riferimento regolato a 650 nm (o 630 nm). 2. Calcolare la media delle determinazioni in duplicato. 3. Costruire la curva di calibrazione su carta millimetrata semilogaritmica o lineare ponendo in ordinata le medie dei colpi per minuto (cpm) dei replicati degli standard e in ascissa le rispettive concentrazioni di Renina umano, collegando i punti tracciati con linee rette. 4. Determinare le concentrazioni e controlli per interpolazione sulla curva di taratura. 5. E possibile utilizzare un sistema di interpolazione dati automatizzato. Con un sistema automatico di interpolazione dati, utilizzare la curva a 4 parametri. XII. CARATTERISTICHE TIPICHE I dati che seguono sono esclusivamente a scopo illustrativo e non devono essere in nessun caso utilizzati al posto della curva di taratura "real time". Campione Valore della renin Valore di renina + emoglobina Valore di renina + bilirubina Plasma 1 12,8 7,5 13,1 Plasma 2 62,7 41,0 60,0 Plasma 3 10,8 7,1 11,7 D. Precisione INTRA SAGGIO Campione N <> ± SD A B ,7 ± 0,9 67,3 ± 1,5 CV 5,4 2,2 INTER SAGGIO Campione N <> ± SD A B SD : Deviazione Standard; CV: Coefficiente di Variazione E. Accuratezza Campione TEST DI RECUPERO Renina aggiunta Siero 37,1 78,0 131,2 228,5 Renina recuperata 38,0 62,0 109,1 241,5 16,8 ± 1,1 64,6 ± 2,2 CV 6,2 3,3 Recupero 102,4 79,5 83,2 105,7 ReninEASIA Unità OD TEST DI DILUIZIONE Calibratore 0 pg/ml 3,9 pg/ml 11 pg/ml 55 pg/ml 91 pg/ml 270 pg/ml 0,074 0,121 0,2 0,68 1,068 2,6 Campione Diluizione Concentrazione teorica 1 1/1 1/2 1/4 1/8 53,6 24,2 11,1 Concentrazione misurata 103,8 51,9 25,9 12,9 XIII. CARATTERISTICHE E LIMITI DEL METODO A. Sensibilità Ventiquattro replicati dello standard zero sono stati dosati insieme agli altri standard. La sensibilità, calcolata come concentrazione apparente di un campione con OD pari alla media più 2 deviazioni standard di 16 replicati dello standard zero, è risultata essere 0,8 pg/ml. B. Specificità In questo test di dosaggio EASIA della Renina, la reattività crociata della Prorenina è stata determinata misurando la risposta apparente di Renina dopo aggiunta di varie concentrazioni di Prorenina a una matrice plasmatica. La reattività crociata della Prorenina è risultata pari allo 0,2%. C. Interferenze con emoglobina e bilirubina Mediante il kit Diasource Renin EASIA sono state analizzate l'emoglobina alla concentrazione di 7,5 mg/ml e la bilirubina a 0,2 mg/lml. I risultati sono mostrati nella tabella sotto riportata. Non sono state osservate interferenze statisticamente significative con la bilirubina; tuttavia, si devono evitare i campioni emolitici. 2 1/1 1/2 1/4 1/8 1/16 52,9 26,4 13,2 6,6 I campioni sono stati diluiti con calibratore zero. XIV. CONTROLLO DI QUALITA INTERNO 105,8 51,6 26,6 13,8 5,5 Se i risultati ottenuti dosando il Controllo 1 e il Controllo 2 non sono all interno dei limiti riportati sull etichetta dei flaconi, non è opportuno utilizzare i risultati ottenuti per i campioni, a meno che non si trovi una giustificazione soddisfacente. Ogni laboratorio può preparare un proprio pool di sieri da utilizzare come controllo, da conservare congelato in aliquote. I controlli che contengono azide interferiscono con la reazione enzimatica e quindi non possono essere utilizzati. I criteri di accettazione delle differenze tra i risultati in duplicato dei campioni devono basarsi sulla buona prassi di laboratorio. Si raccomanda di saggiare i controlli con regolarità come campioni sconosciuti per misurare la variabilità del saggio. La resa del saggio deve essere monitorata con tabelle di controllo qualità dei controlli. È buona pratica verificare visivamente il modello di curva selezionato dal computer.

14 XV. INTERVALLI DI RIFERIMENTO XVIII. SCHEMA DEL DOSAGGIO Questi valori sono puramente indicativi, ciascun laboratorio potrà stabilire i propri intervalli normali. Il range di normalità (0,8 16,5 pg/ml) è stato determinato su 20 soggetti normali, con valore medio pari a 4,9 pg/ml. CALIBRATORE (µl) CAMPIONI CONTROLLI (µl) XVI. PRECAUZIONI PER L USO Calibratore (0 5) Controlli, Campioni Sicurezza Il kit è solo per uso diagnostico in vitro. I reattivi di origine umana presenti nel kit sono stati dosati con metodi approvati da organismi di controllo europei o da FDA e si sono rivelati negativi per HBs Ag, anti HCV, anti HIV1 e anti HIV2. Non sono disponibili metodi in grado di offrire la certezza assoluta che derivati da sangue umano non possano provocare epatiti, AIDS o trasmettere altre infezioni. Manipolare questi reattivi o i campioni di siero o plasma secondo le procedure di sicurezza vigenti. Tutti i prodotti di origine animale o loro derivati provengono da animali sani. I componenti di origine bovina provengono da paesi dove non sono stati segnalati casi di BSE. E comunque necessario considerare i prodotti di origine animale come potenziali fonti di infezioni. Evitare qualsiasi contatto della cute con tutti i reagenti, la soluzione di arresto contiene HCl. In caso di contatto, lavare abbondamentemente con acqua. Non fumare, bere, mangiare o applicare cosmetici nell area di lavoro. Non pipettare i reattivi con pipette a bocca. Utilizzare indumenti protettivi e guanti monouso. XVII. RIFERIMENTI BIBLIOGRAFICI (1) Primary structure of the human Renin gene : Hardman J.A; and al. ; DNA (1984): 3(6): (2) Control of glomerular filtration rate by renninangiotensin system : Hall J. E. and al; Am.J.Physiol. (1977) : 233(5) :F366F372 (3) Raised aldosterone to renine ratio predicts antihypertensive efficacity of spironolactone: a prospective cohort followup study : Lim P.O. and al ; Br. J. Clin. Pharmacol. (1999) : 48(5) : (4) Screening of primary aldosteronism :Schirpenbach C. and al ; Best Pract. Res. Clin. Endocrinol. Metab.(2006) : 20(3) : (5) Diagnostic procedure in renovascular hypertension :Distler A. and al. Clinical nephrology (1991) :36(4): (6) Circulating and tissue angiotensin systems :Campbell D.J. ; J. Clin. Invest. (1987) :79(1) :16 Incubare per 1 ora a temperatura ambiente sotto agitazione continua a 400 rpm. Aspirare il contenuto di ogni pozzetto. Lavare 3 volte con 400 µl di soluzione di lavaggio e aspirare. Conjugato antireninahrp Incubare per 1 ora a temperatura ambiente sotto agitazione continua a 400 rpm. Aspirare il contenuto di ogni pozzetto. Lavare 3 volte con 400 µl di soluzione di lavaggio e aspirare. Soluzione chromogena Incubare per 30 minuti a temperatura ambiente. Soluzione di arresto Leggere su un lettore per piastra da microtitolazione. Registrare l assorbanza di ogni pozzetto a 450 nm (rispetto a 630 o 650 nm). Numero di catalogo di DIAsource: KAP1531 P.I. numero: /it Revisione numero: /1 Data di revisione :

15 es Leer el protocolo completo antes de usar. ReninEASIA I. INSTRUCCIONES DE USO Ensayo inmunoenzimático para la determinación cuantitativa in vitro de Renina activa en plasma humano. II. INFORMACIÓN GENERAL A. Nombre: DIAsource ReninEASIA Kit B. Número de Catálogo: KAP1531 : 96 determinaciones C. Fabricado por: DIAsource ImmunoAssays S.A. Rue du Bosquet, 2, B1348 LouvainlaNeuve, Belgium. Para asistencia técnica e información sobre pedidos contactar: Tel: +32 (0) Fax : +32 (0) III. CONTEXTO CLÍNICO La Renina, una enzima polipeptídica (PM ~ 40000) (1) conocida también como angiotensinogenasa, es una proteasa circulante secretada por las células yuxtaglomerulares en el aparato yuxtaglomerular de los riñones como respuesta a bajo volumen sanguíneo o bajo contenido de NaCl en el organismo. La Renina activa el sistema reninaangiotensina dividiendo el angiotensinógeno producido en el hígado en Angiotensina I (inactiva) que a su vez es convertida en Angiotensina II (activa) en el epitelio vascular del pulmón. La Angiotensina II puede provocar vasoconstricción al estimular el sistema nervioso central, además estimula la secreción de la HAD (hormona anti diurética) y la secreción de aldosterona en la glándula suprarrenal.(6) La regulación de la presión sanguínea y el control de la filtración glomerular (2) son las funciones más importantes del sistema reninaangiotensina. La concentración plasmática de la renina está influenciada por la concentración del angiotensinógeno circulante y posteriormente por la concentración de la Angiotensina II. Niveles plasmáticos altos de Angiotensina II reducen la secreción de renina (retroalimentación negativa). La determinación de los niveles plasmáticos de renina es útil en el diagnóstico de hipertensión y en el seguimiento terapéutico de los pacientes hipertensos (3). La concentración plasmática de la renina disminuye en pacientes hipertensos debido a hiperaldosteronismo primario (4), al contrario de la hipertensión renovascular (5) donde tanto la concentración de la renina como la de aldosterona, están aumentadas.

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