Chronic hypoxia increases fetoplacental vascular resistance in rat placenta perfused with blood

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11130%2F16%3A10332612" target="_blank" >RIV/00216208:11130/16:10332612 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.4149/BLL_2016_113" target="_blank" >http://dx.doi.org/10.4149/BLL_2016_113</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.4149/BLL_2016_113" target="_blank" >10.4149/BLL_2016_113</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Chronic hypoxia increases fetoplacental vascular resistance in rat placenta perfused with blood

Popis výsledku v původním jazyce

BACKGROUND: Chronic hypoxia elevates vascular resistance on the fetal side of the placenta. However, when a low-viscosity perfusate is used, the increase in resistance caused by chronic hypoxia is relatively small (12 mmHg). In the present study, we tested the hypothesis that perfusion with more viscous fluid (blood) will reveal more substantial effect of chronic hypoxia. METHODS: Using an isolated, dually perfused rat placenta perfused at a constant flow rate with homologous blood, perfusion pressure on the fetal side was measured. Then, the relationship between perfusion pressure and flow (P/Q) was determined. RESULTS: Fetoplacental vascular resistance was increased by chronic hypoxia (10 % O-2) during the last third of gestation. This was observed when the placentas were perfused with a low viscosity Krebs solution and more enhanced when perfused with blood. Nevertheless, we found no clear advantage for using blood instead of Krebs solution to study the effects of hypoxia on the fetoplacental vasculature. The elevation of fetoplacental vascular resistance caused by chronic hypoxia was at least partly resistant to acute reoxygenation. CONCLUSION: Using blood for the perfusion of the isolated rat placenta does not confer any clear methodological advantage over using Krebs solution (Tab. 2, Fig. 2, Ref. 21). Text in PDF www.elis.sk.

Název v anglickém jazyce

Chronic hypoxia increases fetoplacental vascular resistance in rat placenta perfused with blood

Popis výsledku anglicky

BACKGROUND: Chronic hypoxia elevates vascular resistance on the fetal side of the placenta. However, when a low-viscosity perfusate is used, the increase in resistance caused by chronic hypoxia is relatively small (12 mmHg). In the present study, we tested the hypothesis that perfusion with more viscous fluid (blood) will reveal more substantial effect of chronic hypoxia. METHODS: Using an isolated, dually perfused rat placenta perfused at a constant flow rate with homologous blood, perfusion pressure on the fetal side was measured. Then, the relationship between perfusion pressure and flow (P/Q) was determined. RESULTS: Fetoplacental vascular resistance was increased by chronic hypoxia (10 % O-2) during the last third of gestation. This was observed when the placentas were perfused with a low viscosity Krebs solution and more enhanced when perfused with blood. Nevertheless, we found no clear advantage for using blood instead of Krebs solution to study the effects of hypoxia on the fetoplacental vasculature. The elevation of fetoplacental vascular resistance caused by chronic hypoxia was at least partly resistant to acute reoxygenation. CONCLUSION: Using blood for the perfusion of the isolated rat placenta does not confer any clear methodological advantage over using Krebs solution (Tab. 2, Fig. 2, Ref. 21). Text in PDF www.elis.sk.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

FA - Kardiovaskulární nemoci včetně kardiochirurgie

OECD FORD obor

—

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

2016

Kód důvěrnosti údajů

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

Název periodika

Bratislavské lekárske listy

ISSN

0006-9248

e-ISSN

—

Svazek periodika

117

Číslo periodika v rámci svazku

10

Stát vydavatele periodika

SK - Slovenská republika

Počet stran výsledku

4

Strana od-do

583-586

Kód UT WoS článku

000387631100006

EID výsledku v databázi Scopus

2-s2.0-85014922999