Intraventricular Spring Expander Attenuates Cardiac Atrophy of the Failing Heart After Unloading Caused by Heterotopic Heart Transplantation: No Sex-Linked Differences

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00023001%3A_____%2F25%3A00085785" target="_blank" >RIV/00023001:_____/25:00085785 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11120/25:43928706

Výsledek na webu

<a href="https://www.biomed.cas.cz/physiolres/pdf/2025/74_373.pdf" target="_blank" >https://www.biomed.cas.cz/physiolres/pdf/2025/74_373.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.33549/physiolres.935560" target="_blank" >10.33549/physiolres.935560</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Intraventricular Spring Expander Attenuates Cardiac Atrophy of the Failing Heart After Unloading Caused by Heterotopic Heart Transplantation: No Sex-Linked Differences

Popis výsledku v původním jazyce

Cardiac atrophy is the most common complication of prolonged application of the left ventricle (LV) assist device (LVAD) in patients with advanced heart failure (HF), obviously, it is a consequence of LVAD-induced mechanical unloading. Previous studies employing heterotopic heart transplantation (HTx) as a model of heart unloading after LVAD implantation discovered sex-linked differences in the course of unloading-induced in the healthy hearts. It remains to be clarified if sex-related differences are present in the failing hearts after heterotopic HTx. Therefore, we first compared the course of unloading-induced cardiac atrophy in the failing hearts in intact (without gonadectomy) male and female rats, and in animals after gonadectomy, to explore the influence of sex hormones on this process. Second, we examined if the animal&apos;s sex modifies the effects of increased isovolumic loading of the LV on the course of unloading-induced cardiac atrophy. Heterotopic abdominal heart transplantation (HTx) was used as a rat model of heart unloading. HF was induced by volume overload achieved by creation of aorto-caval fistula. Increased isovolumic loading was obtained by implantation of specially designed three-branch spring expander into the LV. The degree of cardiac atrophy was assessed as the whole heart weight (HW) ratio of the heterotopically transplanted to the native control heart. We found that decreases in HW after HTx were similar in intact male and female rats, similarly in intact and gonadectomized animals. Implantation of the expander significantly and comparably reduced decreases in HW in male and in female rats. We conclude that there are no sex-linked differences in the development of unloading-induced cardiac atrophy in the failing hearts. Our results also show that enhanced isovolumic heart loading obtained using the spring expander attenuates the development of unloading-induced cardiac atrophy in the failing hearts; the degree of attenuation is similar in both sexes.

Název v anglickém jazyce

Intraventricular Spring Expander Attenuates Cardiac Atrophy of the Failing Heart After Unloading Caused by Heterotopic Heart Transplantation: No Sex-Linked Differences

Popis výsledku anglicky

Cardiac atrophy is the most common complication of prolonged application of the left ventricle (LV) assist device (LVAD) in patients with advanced heart failure (HF), obviously, it is a consequence of LVAD-induced mechanical unloading. Previous studies employing heterotopic heart transplantation (HTx) as a model of heart unloading after LVAD implantation discovered sex-linked differences in the course of unloading-induced in the healthy hearts. It remains to be clarified if sex-related differences are present in the failing hearts after heterotopic HTx. Therefore, we first compared the course of unloading-induced cardiac atrophy in the failing hearts in intact (without gonadectomy) male and female rats, and in animals after gonadectomy, to explore the influence of sex hormones on this process. Second, we examined if the animal&apos;s sex modifies the effects of increased isovolumic loading of the LV on the course of unloading-induced cardiac atrophy. Heterotopic abdominal heart transplantation (HTx) was used as a rat model of heart unloading. HF was induced by volume overload achieved by creation of aorto-caval fistula. Increased isovolumic loading was obtained by implantation of specially designed three-branch spring expander into the LV. The degree of cardiac atrophy was assessed as the whole heart weight (HW) ratio of the heterotopically transplanted to the native control heart. We found that decreases in HW after HTx were similar in intact male and female rats, similarly in intact and gonadectomized animals. Implantation of the expander significantly and comparably reduced decreases in HW in male and in female rats. We conclude that there are no sex-linked differences in the development of unloading-induced cardiac atrophy in the failing hearts. Our results also show that enhanced isovolumic heart loading obtained using the spring expander attenuates the development of unloading-induced cardiac atrophy in the failing hearts; the degree of attenuation is similar 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

3

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

20

Strana od-do

373-392

Kód UT WoS článku

001538912100003

EID výsledku v databázi Scopus

2-s2.0-105012235360