The last twenty years witnessed the emergence of the thymosin 4 (T4)C em N /em -acetyl-seryl-aspartyl-lysyl-proline (Ac-SDKP) pathway as a new source of future therapeutic tools to treat cardiovascular and renal diseases. encouraging Histone-H2A-(107-122)-Ac-OH that Ac-SDKP or its degradation-resistant analogs could serve as fresh therapeutic tools to treat cardiac, vascular, and renal injury and dysfunction to be used alone or in combination with the already founded pharmacotherapy for cardiovascular diseases. strong class=”kwd-title” Keywords: Ac-SDKP, thymosin beta 4, cardiovascular, renal, angiotensin-converting enzyme Rsum: Au cours des 20 dernires annes, nous avons aid lmergence de la voie de signalisation de la thymosine 4 (T4)C em N /em -actyl-sryl-aspartyl-lysyl-proline (Ac-SDKP) comme nouvelle resource doutils thrapeutiques futurs pour le traitement de maladies cardiovasculaires et rnales. Dans cet article de synthse, nous avons tent de mettre en lumire les nombreux rsultats exprimentaux quant aux nombreuses avenues thrapeutiques cardiovasculaires prometteuses pour le T4 ou lAc-SDKP, child driv N-terminal. Spcifiquement, lAc-SDKP est un produit endogne obtenu partir de T4 de 43 acides amins par 2 enzymes successives : la mprine et la prolyl oligopeptidase. Nous avons aussi discut dventuels modes daction pouvant jouer un r?le dans les effets biologiques cardiovasculaires associs au T4CAc-SDKP. Dans le myocarde infarci, le T4 et lAc-SDKP facilitent la rparation du c?ur aprs linfarctus en favorisant la migration des cellules endothliales et la survie des myocytes. En outre, le T4 et lAc-SDKP ont des proprits anti-fibrotiques et anti-inflammatoires dans les artres, le c?ur, les poumons et les reins, et stimulent langiogense tant in vitro quin vivo. Les effets du T4 peuvent tre mdis directement par lintermdiaire dun rcepteur putatif (Ku80) ou de lAc-SDKP, child driv N-terminal, libr de manire enzymatique. En dpit de la localisation et de la caractrisation des sites de liaison de lAc-SDKP dans le myocarde, dautres tudes seraient ncessaires pour caractriser entirement et cloner les rcepteurs de lAc-SDKP. Il demeure prometteur que lAc-SDKP ou ses analogues rsistants la dgradation puissent Histone-H2A-(107-122)-Ac-OH servir de nouveaux outils thrapeutiques contre les lsions et le dysfonctionnement du c?ur, des vaisseaux et des reins utiliss seuls ou en association avec des providers pharmacothrapeutiques dj tablis contre les maladies cardiovasculaires. [Traduit par la Rdaction] strong class=”kwd-title” Mots-cls : Ac-SDKP, thymosine bta 4, cardiovasculaire, rnal, enzyme de conversion de langiotensine General aspects of thymosin 4 (T4)C em N /em -acetylseryl-aspartyl-lysyl-proline (Ac-SDKP) T4 is an endogenous 43-amino acid peptide, 1st isolated in the thymus and consequently found in the blood circulation, urine, and various organs, including the heart and kidneys (Mora et al. 1997). T4 was best known for its G-actin sequestering protein, and thus avoiding actin polymerization and ensuring the availability Histone-H2A-(107-122)-Ac-OH of an ideal amount of actin monomer for quick filament elongation (F-actin formation) when it is needed for specific cell activity (Cavasin 2006). However, it became obvious that T4 offers numerous biological functions, including activation of cell migration, angiogenesis, cell survival, cells regeneration, and inhibition of swelling (Crockford et al. 2010). T4 is the precursor of Ac-SDKP because it contains the Ac-SDKP sequence in its NH2-terminal (Hannappel 2010). Our group has shown previously that Ac-SDKP is definitely released from T4 from the peptidases present in kidney homogenates, and specific inhibitors of prolyl oligopeptidase (POP) block this launch (Cavasin et al. 2004). However, POP has a structural characteristic that prevents the enzyme from hydrolyzing peptides comprising more than 30 amino acids (Polgr 2002), meaning that larger peptides and proteins are resistant to POP hydrolysis. Therefore, prior to Ac-SDKP launch via POP cleavage, T4 must undergo hydrolysis by a newly explained peptidase, meprin (Kumar et al. 2016). T4 has several biological functions that have been reported in numerous studies. In permanently ligated mouse and ischemiaCreperfusion pig models, T4 stimulated myocardial cell migration, promoted angiogenesis and survival of cardiomyocytes, and decreased inflammation, thus improving cardiac function (Hinkel et al. 2008). We’ve reported that T4 also, at a dosage that is struggling to generate ideal circulating Ac-SDKP concentrations (Rhaleb et al. 2001 em b /em ), prevents cardiac rupture and boosts cardiac function post-myocardial infarction (MI) via its anti-inflammatory, proangiogenic, and anti-apoptotic activities inside a murine style of severe MI (Peng et al. 2014). Similar email address details are acquired when Rabbit Polyclonal to PMS1 Ac-SDKP was utilized rather than T4 (Peng et al. 2019, in press). The MI model in.