Sex-specific differences in plasma levels of FXII, HK, and FXIIa-C1-esterase inhibitor complexes in community acquired pneumonia.
Fiche publication
Date publication
juillet 2021
Journal
American journal of physiology. Lung cellular and molecular physiology
Auteurs
Membres identifiés du Cancéropôle Est :
Dr BARRETO Guillermo
Tous les auteurs :
Ehrlich K, Wilhelm J, Markart P, Weisser H, Wolff JC, Bein G, Pak O, Barreto G, Weissmann N, Schramm F, Seeger W, Schaefer L, Kuebler WM, Wygrecka M,
Lien Pubmed
Résumé
Sex-dependent differences in immunity and coagulation play an active role in the outcome of community-acquired pneumonia (CAP). Contact phase proteins act at the crossroads between inflammation and coagulation thus representing a point of convergence in host defense against infection. Here, we measured the levels of factor XII (FXII), FXIIa-C1 esterase inhibitor (C1INH) complexes, and high molecular weight kininogen (HK) in plasma of CAP patients and correlated them to clinical disease severity. Levels of FXIIa-C1INH/albumin ratio were elevated, irrespective of sex, in plasma of CAP patients (n=139) as compared to age-matched donors (n=58). No simultaneous decrease in FXII levels, indicating its consumption, was observed. Stratification by sex revealed augmented FXII levels in plasma of CAP women as compared to sex-matched donors yet no apparent differences in men. This sex-specific effect was, however, attributable to lower FXII levels in female donors relative to men donors. Plasma estradiol levels mirrored those for FXII. Levels of HK/albumin ratio were decreased in CAP plasma as compared to donors, however, after stratification by sex, this difference was only observed in women and was related to higher HK/albumin values in female donors as opposed to male donors. Finally, strong negative correlation between plasma levels of HK/albumin ratio and CAP severity, as assessed by CRB65 score, in males and females was observed. Our study identifies sex-dependent differences in plasma levels of the contact phase proteins in elderly subjects that may contribute to specific clinical outcomes in CAP between men and women.
Mots clés
community-acquired pneumonia, contact phase system, factor XII, high molecular weight kininogen
Référence
Am J Physiol Lung Cell Mol Physiol. 2021 07 28;: