Dissertations / Theses on the topic 'Enzyme de conversion de l'angiotensine I [ECA]'
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Gomez, Catherine. "Elaboration de nouveaux inhibiteurs mixtes ECA/ECE pour le traitement de l'hypertension." Phd thesis, Université d'Orléans, 2008. http://tel.archives-ouvertes.fr/tel-00465126.
Full textTestut, Patrice. "Etude du promoteur somatique de l'enzyme de conversion de l'angiotensine 1 (ECA) dans un modèle de cellules endothéliales, génération de rats transgéniques pour l'ECA humain." Paris 11, 1994. http://www.theses.fr/1994PA11T013.
Full textBodin-Rollin, Sophie. "Rôle de l'enzyme de conversion et du système kallicréine-kinines dans le diabète et ses complications rénales." Paris 6, 2008. http://www.theses.fr/2008PA066282.
Full textDa, Silva Fabio. "Étude du rôle de R-spondin3 dans la formation des artères coronaires et des nouvelles fonctions dans la signalisation de l'acide rétinoïque au cours du développement et de la réparation cardiaque." Thesis, Université Côte d'Azur (ComUE), 2017. http://www.theses.fr/2017AZUR4082/document.
Full textCoronary heart disease is one of the leading causes of death worldwide. How coronary arteries are remodeled and the signaling molecules that govern this process are poorly understood. For the first part of my thesis, I have identified the Wnt-signaling modulator Rspo3 as a crucial regulator of coronary artery formation in the developing heart. Rspo3 is specifically expressed around the coronary stems at critical time-points in their development. Temporal ablation of Rspo3 leads to decreased β-catenin signaling and a reduction in arterial-specific proliferation. As a result, the coronary stems are defective and the arterial tree does not form properly. These results identify a mechanism through which localized expression of RSPO3 induces proliferation of the coronary arteries at their stems and permits their formation. Treating patients recovering from myocardial infarction (MI) is difficult since cardiomyocytes have a very limited capacity to proliferate and regenerate the damaged heart. The Retinoic Acid (RA) signaling pathway is essential for cardiac development and plays a protective role in damaged hearts. For the second part of my thesis, I have utilized a novel RA reporter line and I have observed a cardiomyocyte-specific response. Ablation of RA signaling through genetic deletion of the Raldh1/2/3 enzymes leads to increased myocyte apoptosis both during late development and after MI. RNA sequencing analysis of primary cardiomyocytes reveals atRA treatment represses Ace1 expression, providing a novel link between RA signaling and the Renin Angiotensin System in the context of heart repair
AFCHAIN, GERY. "Rein et inhibiteurs de l'enzyme de conversion de l'angiotensine : les inhibiteurs de l'enzyme de conversion de l'angiotensine chez le sujet age." Lille 2, 1990. http://www.theses.fr/1990LIL2M328.
Full textPANAYE, JEAN-PAUL. "Sarcoidose et inhibiteurs de l'enzyme de conversion de l'angiotensine." Toulouse 3, 1988. http://www.theses.fr/1988TOU31034.
Full textBaudin, Bruno. "L'enzyme de conversion de l'angiotensine I endothéliale : biochimie, biologie cellulaire et application à la pathologie." Paris 5, 1989. http://www.theses.fr/1989PA05P501.
Full textBenetos, Athanase. "Enzyme de conversion de l'angiotensine, alterations des gros troncs arteriels et hypertension." Paris 6, 1994. http://www.theses.fr/1994PA066780.
Full textCakmak, Zaliha. "Optimisation d'un test d'inhibition de l'enzime de conversion de l'angiotensine-1." Master's thesis, Université Laval, 2008. http://www.theses.ulaval.ca/2008/25357/25357.pdf.
Full textMorival, Laurent. "Insuffisance renale aigue sous inhibiteurs de l'enzyme de conversion de l'angiotensine." Reims, 1991. http://www.theses.fr/1991REIMM041.
Full textSNEED, FRANCOISE. "Role trophique de l'angiotensine ii et effets des inhibiteurs de l'enzyme de conversion de l'angiotensine sur la paroi vasculaire." Strasbourg 1, 1993. http://www.theses.fr/1993STR15041.
Full textHarrabi, Salem. "Production de l'enzyme de conversion de l'angiotensine I dans la sarcoïdose pulmonaire : aspects biochimiques et immunologiques." Lyon 1, 1985. http://www.theses.fr/1985LYO1W225.
Full textSimunić, Juraj. "Polymorphisme de l'enzyme de conversion de l'angiotensine chez l'écrevisse, étude de l'isoforme testiculaire." Paris 6, 2009. http://www.theses.fr/2009PA066557.
Full textNACE, LIONEL. "L'insuffisance renale aigue au cours des traitements par inhibiteurs de l'enzyme de conversion de l'angiotensine." Nancy 1, 1990. http://www.theses.fr/1990NAN11296.
Full textDidelot, Sandrine. "Obtention d'hydrolysats inhibiteurs de l'enzyme de conversion de l'angiotensine par fermentation de lactosérum caprin : caractérisation de peptides d'intérêt biologique." La Rochelle, 2005. http://www.theses.fr/2005LAROS152.
Full textEnzymatic hydrolysis of whey proteins (α-lactalbumin and β-lactoglobulin) permits the release of numerous bioactives peptides (antihypertensive, antibacterial, antitumoral…). In this study, six hydrolysates with antihypertensive activity were obtained after whey fermentation by 25 cheese microflora. The hydrolysate showing the most important activity was obtained after whey fermentation by a co-culture of Lactobacillus paracasei and Candida parapsilosis, both isolated from “Comté” cheese. During fermentation, C. Parapsilosis excrete at least one protease responsible of α-la hydrolysis, which is activated during medium acidification by L. Paracasei growth. A potential antihypertensive peptide characterised as WLAHK was identified in this hydrolysate. This peptide exhibit an IC50 value of 8 µM. During in vitro gastro-intestinal digestion, WLAHK was digested into two peptides P1 and P2 after chymotrypsin digestion. While WLAHK exhibit an ACE inhibitory activity of 35% for 4µg/ml of peptide tested, no activity was detected for the same quantity of peptides P1 and P2 tested
Nonotte, Isabelle. "Localisation et expression de l'enzyme de conversion de l'angiotensine I dans les cellules épithéliales gastriques." Montpellier 1, 1993. http://www.theses.fr/1993MON13510.
Full textAmin, Fatiha. "Relation élasticité artérielle-masse cardiaque chez le rat normotendu, hypertendu et hypertendu systolique isolé : effet d'une inhibition chronique de l'enzyme de conversion de l'angiotensine I." Nancy 1, 1996. http://www.theses.fr/1996NAN10384.
Full textCHALLAH, JACQUES MIREILLE. "Modelisations experimentales des determinants environnementaux et genetiques de l'expresion de l'enzyme de conversion de l'angiotensine i." Paris 11, 1998. http://www.theses.fr/1998PA11T005.
Full textTahraoui, Abdelkrim. "Purification et analyse biochimique comparative des enzymes de conversion de l'angiotensine 1 du poumon et du sérum de porc : structure des chaines glycaniques de l'enzyme pulmonaire." Paris 5, 1990. http://www.theses.fr/1990PA05P618.
Full textRoy, Caroline. "Nouveaux ligands du récepteur B₂ de la bradykinine : endocytose dirigée et catabolisme sélectif." Master's thesis, Université Laval, 2013. http://hdl.handle.net/20.500.11794/24341.
Full textSantiago, Zalvidea. "Role of angiotensin-converting enzyme inhibition on electrical and contractile properties of cardiomyocytes from failing heart in mice." Montpellier 1, 2009. http://www.theses.fr/2009MON1T003.
Full textSinka, Lidia. "L' enzyme de conversion de l'angiotensine (ACE) dans l'ontogenèse du systeme hématopoïetique de l'embryon et du foetus humains." Paris 7, 2008. http://www.theses.fr/2008PA077108.
Full textHematopoietic stem cell (HSC) population was previously identified adhering to the aortic endothelium of the human embryo, which is at the origin of definitive hematopoiesis in man. These precursor cells are generated in the paraaortic splanchnopleura (P-Sp): the presumptive region of the hematogenic aorta. To assess the cellular identity of this intraembryonic hematopoetic activity, we have used a novel monoclonal antibody, BB9, that typifies the most primitive HSCs in the adult. BB9 recognizes angiotensin converting enzyme (ACE). ACE is a key component of renin-angiotensin System (RAS), a blood pressure regulator. We show a direct relationship between expression of ACE and emergence of HSC in all hematopoietic organs during human development and that in vitro and in vivo hematopoietic abilities are restricted to ACE+ HSC. Furthermore, from 19 until day 26 of gestation, BB9 identifies rare CD34"CD45" cells in the hemogenic P-Sp, responsible of in vitro hematopoietic ability. Between 27 and 40 days of development, when HSC clusters are present in ventral side of dorsal aorta, ACE is expressed on intraaortic HSC clusters and surrounding aortic endothelial cells. These results are consistent with the hypothesis of a BB9+CD34" CD45" hemangioblastic precursor migrating from the P-Sp toward the ventral aorta, to give rise to CD34+ intraaortic HSC clusters. These studies demonstrate that ACE is a novel marker of primitive HSCs in the adult and in the human embryo. Moreover, our preliminary results from in vitro experiments with RAS inhibitors indicate that ACE and RAS have direct regulatory effects on developmental hematopoiesis
Plassart, Frédérique. "Intérêt de deux marqueurs biochimiques, la fibronectine et l'enzyme de conversion de l'angiotensine I, dans le diagnostic et la surveillance des brûlures pulmonaires." Paris 5, 1992. http://www.theses.fr/1992PA05P199.
Full textMurillo, Laurence. "Contribution à l'étude d'un environnement physiologique favorable à la biogenèse de peptides hémorphiniques : application au système nerveux central." La Rochelle, 2007. http://www.theses.fr/2007LAROS212.
Full textHemorphins are cryptic bioactive peptides derived from chain hemoglobin proteolysis. Their biological presence has been often associated with particular physiological or pathological conditions, in particular in the central nervous system (CNS). These crypteins, qualified as true neuropeptides by some authors, have a significant effect on the memory and seem to be associated vascular anomalies related to neurodegenerative diseases and ageing. Many studies report the hemorphins presence in the CNS but the inactivation mechanisms and generation mechanisms are not well known. The results obtained suggested that hemorphins would be relatively stable in the brain compared to most of neuropeptides. Angiotensin conversion enzyme could play a major role in cerebral catabolism of hemorphins and would be mainly localized in microsomes and cellular cytosol. Our preliminary model of in vitro cerebral cellular hemoglobin proteolysis are inspired by erythrophagocytosis studies. Glia, astrocytes or microglial cells do not seem to be responsible for hemorphins or other peptides release resulting from hemoglobin degradation under our conditions. Nevertheless, modifications of microglia model are possible in order to check if this cellular type could not be at the origin of hemorphins in the CNS
Grilh, Philippe. "Les antagonistes des récepteurs de l'angiotensine II : pharmacologie comparée avec les inhibiteurs de l'enzyme de conversion." Bordeaux 2, 1997. http://www.theses.fr/1997BOR2P002.
Full textLaurent, Virginie. "Le système rénine-angiotensine chez la sangsue Theromyzon tessulatum." Lille 1, 1998. http://www.theses.fr/1998LIL10005.
Full textLeurs caracteristiques biochimiques (km de 830 m, une activite specifique de 1. 5 nmole d'aii/mg de proteine, ic50 de 200 nmoles avec le captopril, la sequence n terminale suivante: gldpelspgcfsadeagaelfae, dependance de son activite vis a vis du chlore) permettent de supposer leur appartenance a la famille des aces de vertebres ne possedant qu'un seul site catalytique. En outre, elles possedent une activite d'endopeptidase vis a vis de neuropeptides porteurs de liaisons peptidiques hydrophobes comme la bradykinine ou les enkephalines. L'ace de sangsue fait egalement partie des convertases pour un grand nombre de precurseurs de neuropeptides et plus specifiquement les precurseurs de neuropeptides, comme la pomc. Cette double activite, endopeptidase et convertase ne semble pas etre l'apanage de l'ace
El, Debs Bachir. "Functional single-cell hybridoma screening using droplet-based microfluidics." Strasbourg, 2011. http://www.theses.fr/2011STRA6182.
Full textThis thesis describes a microfluidic platform allowing the functional screening of hybridoma cells on the single-cell level. In this system, individual cells from a heterogeneous population are encapsulated into aqueous microdroplets of a water-in-oil emulsion and assayed directly for the release of antibodies inhibiting drug targets. The microfluidic setup comprises a novel fully integrated chip which allows reinjection, fusion and sorting of droplets sufficiently large (~100 µm in diameter) for the cultivation of mammalian cells. We successfully used this device for the specific selection of hybridoma cells releasing antibodies inhibiting angiotensin converting enzyme-1 (ACE-1). After cell encapsulation, the resulting emulsion was incubated off-chip for 6h to obtain significant antibody concentrations. Subsequently, the droplets were reinjected into another chip, fused with a second droplet species containing all components of a fluorescence assay for ACE-1 activity, and droplets with low fluorescence intensity (indicating ACE-1 inhibition) were sorted. A wide variance in antibody expression levels at the single-cell level within a single hybridoma line was observed and high expressors could be sorted and recultivated. The approach enabled screening more than 5_104 cells per hour and should even be applicable to non-immortalized primary B-cells, as no cell proliferation is required
Van, Belle Eric. "Effets de l'inhibition de l'enzyme de conversion de l'angiotensine sur l'expression des oncogenes nucleaires c-myc, c-fos et c-jun et sur l'hyperplasie intimale induites par l'angioplastie experimentale." Lille 2, 1993. http://www.theses.fr/1993LIL2M261.
Full textMichel, Bruno. "L'enzyme de conversion de l'angiotensine i dans la bordure en brosse des cellules epitheliales renales : facteurs de variation de son activite." Strasbourg 1, 1992. http://www.theses.fr/1992STR15081.
Full textPavillard, Ryckwaert Frédérique. "Anesthésie et insuffisance cardiaque : influence d'un traitement préopératoire par un inhibiteur de l'enzyme de conversion : à propos d'une étude clinique réalisée chez 37 patients." Montpellier 1, 1993. http://www.theses.fr/1993MON11097.
Full textPreszburger, Léna. "Les effets secondaires des inhibiteurs de l'enzyme de conversion." Paris 5, 1991. http://www.theses.fr/1991PA05P165.
Full textAl, Bacha Jeanne D'Arc. "Nouvelles fonctions de l'enzyme de conversion de l'angiotensine et du récepteur de la (pro)rénine en pathologies cardiovasculaires et neurologiques." Thesis, Paris 6, 2015. http://www.theses.fr/2015PA066415.
Full textNew components of the renin angiotensin system (RAS) continue to be discovered and their functions studied. This thesis provides new insights on the role of angiotensin converting enzyme (ACE) in thrombosis and cardiovascular diseases (CVD) and of the (pro)renin receptor in the development of the central nervous system (CNS). First, we studied the role of ACE in CVD by analyzing the impact and the association of a mutation in ACE and in plasminogen activator inhibitor-1 (PAI-1) genes compared to other polymorphic cardiovascular genes of proinflammatory cytokines in peripheral blood mononuclear cells in hypertensive hypercholesterolemic Lebanese patients. We showed that Lebanese patients expressing a double mutation (Del/4G) of ACE and PAI-1, respectively, are at high risk of developing CVD, suggesting that combined ACE/PAI-1 mutations may be considered as a potential marker of CVD onset. In the second part, we studied the relation between the (pro)renin receptor, whose gene is called Atp6ap2, and Wnt/beta-catenin signaling pathway, in neural stem/progenitor cells (NSPC) during development. To this end, we used an in vitro model of neural stem cells (NSC) isolated from Atp6ap2-/Y mice embryos and studied their self-renewal capacity and their differentiation into neurons, astrocytes and oligodendrocytes. Our results suggest that Atp6ap2 is necessary for self-renewal of NSC independently of the Wnt/beta-catenin signaling pathway in mammals. In addition, we showed that the expression of ATP6AP2 in human mesenchymal stem cells (hMSC) isolated from adipose tissue was correlated with their degree of neuronal differentiation
Defebvre, Renaud Chevalet Pascal. "Insuffisance cardiaque à fonction systolique altérée." [S.l.] : [s.n.], 2007. http://castore.univ-nantes.fr/castore/GetOAIRef?idDoc=23246.
Full textLucas, Bruno. "Spectroscopie infrarouge couplée à la spectrométrie de masse pour la caractérisation en phase gazeuse de petits systèmes moléculaires neutres ou protonés." Paris 13, 2004. http://www.theses.fr/2004PA132014.
Full textMoutachaouiq, Touria. "Impact d'un traitement chronique par un inhibiteur de l'enzyme de conversion de l'angiotensine I, le lisinopril, sur l'élasticité artérielle et la fonction endothéliale." Nancy 1, 1994. http://www.theses.fr/1994NAN10447.
Full textKoumbadinga, Gérémy Abdull. "Régulation de l'enzyme de conversion de l'angiotensine et caractérisation du récepteur B₁ des kinines au niveau des cellules vasculaires." Doctoral thesis, Université Laval, 2010. http://hdl.handle.net/20.500.11794/21490.
Full textHELENE, ARMELLE, and Philippe Ascher. "Analyse structurale du site actif de trois metallopeptidases a zinc : endopeptidase neutre-24. ii, aminopeptidase n et enzyme de conversion de l'angiotensine." Paris 6, 1993. http://www.theses.fr/1993PA066569.
Full textJACQUEMIN-VERGUET, JEANTROUX MYRIAM. "Proprietes therapeutiques et utilisation pharmacologique de peptides du lait : cas de peptides inhibiteurs de l'enzyme de conversion de l'angiotensine i et de peptides affines pour les recepteurs opiaces." Nancy 1, 1993. http://www.theses.fr/1993NAN1P079.
Full textDuly-Bouhanick, Béatrice. "Contribution a l'evaluation pronostique et au traitement de la nephropathie du diabetique de type 1." Angers, 2001. http://www.theses.fr/2001ANGE0501.
Full textPerrot, Laurent Duchiron Francis. "Evaluation de l'effet antihypertenseur de la fraction oligopeptidique du vin de Champagne. Identification et caractérisation d'oligopeptides." Reims : S.C.D. de l'Université, 2005. http://scdurca.univ-reims.fr/exl-doc/GED00000012.pdf.
Full textPerrot, Laurent. "Evaluation de l'effet antihypertenseur de la fraction oligopeptidique du vin de Champagne. Identification et caractérisation d'oligopeptides." Reims, 2004. http://theses.univ-reims.fr/exl-doc/GED00000012.pdf.
Full textSeveral bioactive peptides, that have a positive impact on hypertension through Angiotensin Converting Enzyme (ACE) inhibition, have been identified in foods. In a previous study, we showed that a champagne extract exhibited an inhibitory activity against ACE in vitro. Therefore, Single oral administration of the champagne extract to spontaneously hypertensive (SHR) rats significantly lowered their blood pressures, when compared with baseline values, 2 hours after administration. Chronic oral administration of the champagne extract significantly lowered blood pressures in SHR too. This effect became significant after 12 days of treatment and was maintained thereafter. In contrast, no significant change in blood pressure was noted in normotensive rats. Peptide content increases on contact with lees during ageing of champagne. Studies performed on the champagne extract showed the identification 11 peptides, which 7 are considered as ACE inhibitors and 6 are of interest in wine aging
Vasconcelos, Antônio Silvio do Egito. "Les protéines du lait de jument : caractérisation physico-chimique et recherche de peptides inhibiteurs de l'enzyme de conversion de l'angiotensine I." Nancy 1, 2002. http://www.theses.fr/2002NAN10016.
Full textA better knowledge of mares' milk proteins and biological activities related to peptides was required. Mares' breeds could be distinguished by electrophoretic analysis of caseins. Equine α-Lactalbumin and lysozyme were partially glycosylated. α-Lactalbumin spontaneously underwent an irreversible conformational change in time. αs1-, ß-, [kappa]-, γ-Caseins and proteose peptone component 5-like peptides were separated and characterized by chromatography, electrophoresis, and microsequencing. The equine caseins show a great heterogeneity probably resulting from variable phosphorylations and glycosylations. [kappa]- And ß-caseins had a preferential site of hydrolysis by chymosin, which generates para-[kappa]-casein and glycomacropeptide from [kappa]-casein. Some tryptic peptides of αs1- and ?-caseins presented an inhibition of the angiotensin I converting enzyme. A concentration of 285 ?M of the ß-casein 32-40 peptide was required to reduce 50% of the enzyme activity
Tatchum, Talom Rabelais. "Fonction endothéliale dans un modèle d'hypertension systolique isolée et chez le rat âgé : impact d'une inhibition chronique de l'enzyme de conversion de l'angiotensine 1." Nancy 1, 1995. http://www.theses.fr/1995NAN10469.
Full textBastien, Dominic. "Identification d'inhibiteurs peptidiques de l'enzyme dipeptidyl peptidase 4 (DPP-4) et de l'enzyme de conversion de l'angiotensine (ACE) dans des laits fermentés." Master's thesis, Université Laval, 2017. http://hdl.handle.net/20.500.11794/28136.
Full textIncidence of hypertension and Type II diabetes (T2D) is increasing world wide. Dietetic intervention is one of the most effective way to prevent and control hypertension and T2D. Food that non-only provide all necessary nutriments but also provide ACE and DPP-4 inhibitors could offer a new health tool to prevent or control hypertension and T2D. Buttermilk, milk, whey proteins and white eggs proteins are known to possess ACE and DPP-4 inhibitors. In this regard, several fermented milks were produced using industrial starters and conditions. The products were then digested in a 2-steps in vitro digestive model. The resulting soluble extracts were screened against ACE and DPP-4 enzymes. Results showed that fermentation only did not produce ACE and DPP-4 inhibitors while the digestive process is required to release these inhibitors. Mass spectroscopy analysis of allowed the identification of 4 DPP-4 inhibitors and 9 ACE which 5 of them are known to be bioactive. This work provides the basis to produce fermented milks with ACE and DPP-4 inhibitors. Further analysis will be required to confirm if these yoghurts can improve blood pressure and glycemic response in humans.
Salfati, Katy. "Effets comparés des inhibiteurs de l'enzyme de conversion et des antagonistes des récepteurs AT1 de l'angiotensine II sur l'insuffisance cardiaque." Paris 5, 2001. http://www.theses.fr/2001PA05P038.
Full textHamdi, Haithem. "Usage des IECA / ARA II chez des aînés traités contre le diabète de type 2." Thesis, Université Laval, 2011. http://www.theses.ulaval.ca/2011/28259/28259.pdf.
Full textRenaud, Isabelle Mélanie. "Effet d'un traitement combiné du périndopril, inhibiteur de l'enzyme de conversion de l'angiotensine, et d'un agent diurétique, l' impamide sur la progression de l'insuffisance rénale chez le rat Zucker obése." Paris 6, 2005. http://www.theses.fr/2005PA066070.
Full textLavecchia, Guido. "Bicycles hétéro-aromatiques azotés et oxygéno-azotés : synthèse et évaluation pharmacologique." Orléans, 2005. http://www.theses.fr/2005ORLE2027.
Full textGodat, Emmanuel. "Contribution des protéases à cystéine à la réaction inflammatoire lors de bronchopneumopathies chroniques obstructives." Tours, 2005. http://www.theses.fr/2005TOUR4013.
Full textThe study of the role of cysteine proteases in pulmonary inflammatory pathologies was articulated around three axes. We detected for the first time active cysteine proteases in human silicotic bronchoalveolar lavages and found a protease/antiprotease imbalance in these biological fluids. In vitro as well as ex vivo experiences (analyses of bradykinin-dependent tensing of rat pulmonary smooth muscles rat) have show that cathepsin K may be, as an angiotensin converting enzyme, a potential kininase. In vitro as well as ex vivo (human monocyte/macrophages THP-1 cells) kinetic analysis indicated that cathepsin K presents an unusual resistance under conditions of oxidative stress
Ben, Henda Yesmine. "Bioactivités de cryptides marins : quels potentiels pour la santé humaine ?" Thesis, La Rochelle, 2014. http://www.theses.fr/2014LAROS032/document.
Full textMarine products represent an important source of active substances, in particular bioactive peptides called cryptides. Cryptides are hidden within the sequence of a parent protein and are released during digestion or industrial proteolytic processes. These cryptides could provide physiological benefit or protection against diseases such as those of metabolic syndrome. In this context, we investigated the action of some marine cryptides on hypertension, diabetes and obesity. We demonstrated that some cryptides can target in vitro several factors associated with the development of metabolic syndrome