Effects of Isovolumic Loading Elicited Either by 3-Branch or by 4-Branch Spring Expander on the Degree of Cardiac Atrophy of the Failing Heart in Rats After Heterotopic Heart Transplantation: No Evidence for Sex-Linked Differences

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00023001%3A_____%2F25%3A00086053" target="_blank" >RIV/00023001:_____/25:00086053 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.biomed.cas.cz/physiolres/pdf/2025/74_729.pdf" target="_blank" >https://www.biomed.cas.cz/physiolres/pdf/2025/74_729.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.33549/physiolres.935650" target="_blank" >10.33549/physiolres.935650</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Effects of Isovolumic Loading Elicited Either by 3-Branch or by 4-Branch Spring Expander on the Degree of Cardiac Atrophy of the Failing Heart in Rats After Heterotopic Heart Transplantation: No Evidence for Sex-Linked Differences

Popis výsledku v původním jazyce

An important harmful side effect of the prolonged support of the left ventricle (LV) with an LV assist device (LVAD) in patients with advanced heart failure (HF) is development of cardiac atrophy. Our first aim was to evaluate if implantation of the four-branch spring expander into LV of the rat will exhibit greater attenuation of unloading-induced cardiac atrophy as compared with the three-branch spring expander. The second aim was to assess if sex-related differences are present in the development of unloading-induced cardiac atrophy in the failing hearts with implanted either three-branch or four-branch spring expander into the LV. Heterotopic heart transplantation in the rat (HTx) served as the model of heart unloading after LVAD implantation. HF was induced by volume overload achieved by creation of the aorto-caval fistula. The degree of cardiac atrophy was assessed as the weight ratio of the heterotopically transplanted heart to the control native heart. We found that enhancement of isovolumic loading by implantation of either type of spring expander into the LV reduced the degree of post-HTx cardiac atrophy in the failing hearts but the four-branch variant was significantly more effective. In addition, we found that there were no sex-related differences in the development of unloading-induced cardiac atrophy or in the attenuation of this process in the failing hearts. We propose that enhancing cardiac work by increasing isovolumic loading via implantation of the spring expander might be a reasonable approach to attenuate the unloading-induced cardiac atrophy in the failing hearts in both sexes.

Název v anglickém jazyce

Effects of Isovolumic Loading Elicited Either by 3-Branch or by 4-Branch Spring Expander on the Degree of Cardiac Atrophy of the Failing Heart in Rats After Heterotopic Heart Transplantation: No Evidence for Sex-Linked Differences

Popis výsledku anglicky

An important harmful side effect of the prolonged support of the left ventricle (LV) with an LV assist device (LVAD) in patients with advanced heart failure (HF) is development of cardiac atrophy. Our first aim was to evaluate if implantation of the four-branch spring expander into LV of the rat will exhibit greater attenuation of unloading-induced cardiac atrophy as compared with the three-branch spring expander. The second aim was to assess if sex-related differences are present in the development of unloading-induced cardiac atrophy in the failing hearts with implanted either three-branch or four-branch spring expander into the LV. Heterotopic heart transplantation in the rat (HTx) served as the model of heart unloading after LVAD implantation. HF was induced by volume overload achieved by creation of the aorto-caval fistula. The degree of cardiac atrophy was assessed as the weight ratio of the heterotopically transplanted heart to the control native heart. We found that enhancement of isovolumic loading by implantation of either type of spring expander into the LV reduced the degree of post-HTx cardiac atrophy in the failing hearts but the four-branch variant was significantly more effective. In addition, we found that there were no sex-related differences in the development of unloading-induced cardiac atrophy or in the attenuation of this process in the failing hearts. We propose that enhancing cardiac work by increasing isovolumic loading via implantation of the spring expander might be a reasonable approach to attenuate the unloading-induced cardiac atrophy in the failing hearts in both sexes.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

30105 - Physiology (including cytology)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Physiological research

ISSN

0862-8408

e-ISSN

1802-9973

Svazek periodika

74

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

13

Strana od-do

729-741

Kód UT WoS článku

001631813000004

EID výsledku v databázi Scopus

2-s2.0-105020873953