Respiratory development in burrowing rodents: Effect of perinatal hypercapnia.
Respir Physiol Neurobiol
; 288: 103640, 2021 06.
Article
em En
| MEDLINE
| ID: mdl-33588089
ABSTRACT
Burrowing rodents have a blunted hypercapnic ventilatory response compared to non-burrowing rodents, but semi-fossorial ground squirrels and hamsters are not born with this blunted response when raised in room conditions. This study examined the hypercapnic ventilatory response of rats, hamsters, and ground squirrels raised in burrow-like hypercapnia (â¼3 % CO2) through development (embryonic day 16-18 to postnatal day 30) to determine if chronic hypercapnia exerts any effect on the developing and adult semi-fossorial response. Chronic hypercapnia attenuated the ventilatory response to 5 % CO2 by 60 % (rats), 150 % (hamsters), and 70 % (squirrels) in newborns when compared to newborns raised in normal conditions. When raised in burrow conditions, squirrels and hamsters reached the blunted adult response â¼8-12 days sooner in development than their room air counterparts, while burrow-reared rats maintained a consistently blunted response until removal from chronic hypercapnia. Our study revealed no lasting effect of chronic hypercarbia on the ventilatory responses to CO2 in burrowing rodents, but rather a change in the developmental profile such that the blunted adult response was reached earlier in development.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Roedores
/
Dióxido de Carbono
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Ventilação Pulmonar
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Hipercapnia
Limite:
Animals
/
Pregnancy
Idioma:
En
Revista:
Respir Physiol Neurobiol
Ano de publicação:
2021
Tipo de documento:
Article
País de publicação:
HOLANDA
/
HOLLAND
/
NETHERLANDS
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NL
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PAISES BAJOS
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THE NETHERLANDS