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001-es BibID:	BIBFORM109145
035-os BibID:	(scopus)85130294773 (wos)000797144600001
Első szerző:	Gömöri Kamilla
Cím:	Ca2+/calmodulin-dependent protein kinase II and protein kinase G oxidation contributes to impaired sarcomeric proteins in hypertrophy model / Gömöri Kamilla, Herwig Melissa, Budde Heidi, Hassoun Roua, Mostafi Nusratul, Zhazykbayeva Saltanat, Sieme Marcel, Modi Suvasini, Szabados Tamara, Pipis Judit, Farkas-Morvay Nikolett, Leprán István, Ágoston Gergely, Baczkó István, Kovács Árpád, Mügge Andreas, Ferdinandy Péter, Görbe Anikó, Bencsik Péter, Hamdani Nazha
Dátum:	2022
ISSN:	2055-5822
Megjegyzések:	Aims: Volume overload (VO) induced hypertrophy is one of the hallmarks to the development of heart diseases. Understanding the compensatory mechanisms involved in this process might help preventing the disease progression. Methods and results: Therefore, the present study used 2 months old Wistar rats, which underwent an aortocaval fistula to develop VO-induced hypertrophy. The animals were subdivided into four different groups, two sham operated animals served as age-matched controls and two groups with aortocaval fistula. Echocardiography was performed prior termination after 4- and 8-month. Functional and molecular changes of several sarcomeric proteins and their signalling pathways involved in the regulation and modulation of cardiomyocyte function were investigated. Results: The model was characterized with preserved ejection fraction in all groups and with elevated heart/body weight ratio, left/right ventricular and atrial weight at 4- and 8-month, which indicates VO-induced hypertrophy. In addition, 8-months groups showed increased left ventricular internal diameter during diastole, RV internal diameter, stroke volume and velocity-time index compared with their age-matched controls. These changes were accompanied by increased Ca2+ sensitivity and titin-based cardiomyocyte stiffness in 8-month VO rats compared with other groups. The altered cardiomyocyte mechanics was associated with phosphorylation deficit of sarcomeric proteins cardiac troponin I, myosin binding protein C and titin, also accompanied with impaired signalling pathways involved in phosphorylation of these sarcomeric proteins in 8-month VO rats compared with age-matched control group. Impaired protein phosphorylation status and dysregulated signalling pathways were associated with significant alterations in the oxidative status of both kinases CaMKII and PKG explaining by this the elevated Ca2+ sensitivity and titin-based cardiomyocyte stiffness and perhaps the development of hypertrophy. Conclusions: Our findings showed VO-induced cardiomyocyte dysfunction via deranged phosphorylation of myofilament proteins and signalling pathways due to increased oxidative state of CaMKII and PKG and this might contribute to the development of hypertrophy.
Tárgyszavak:	Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk
Megjelenés:	ESC heart failure. - 9 : 4 (2022), p. 2585-2600. -
További szerzők:	Herwig, Melissa Budde, Heidi Hassoun, Roua Mostafi, Nusratul Zhazykbayeva, Saltanat Sieme, Marcel Modi, Suvasini Szabados Tamara Pipis Judit Farkas-Morvay Nikolett Leprán István Ágoston Gergely Baczkó István Kovács Árpád (1986-) (kardiológus) Mügge, Andreas Ferdinándy Péter Görbe Anikó Bencsik Péter Hamdani, Nazha
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