The effects of castration and sex steroids on ventilatory control in male guinea pigs

Alan (Roger) Hohimer, Mark V. Hart, John A. Resko

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Male guinea pigs (N = 7) given progesterone hyperventilate with PaCO2 fallings from control levels of 39.0 ± 0.6 (SEM) Torr to 32.0 ± 0.7 Torr after 7 days of treatment. This response was associated with a rise in plasma progesterone concentration to approximately 15 ng ml-1 and a transient rise in plasma 17β-estradiol concentrations. To determine the role of the testes in generating teh transient estrogen increase as well as the significance of estrogens to the progesterone response, male guinea pigs were castrated and treated either with estradiol or a placebo. Estrogen-treated castrates (N = 15) had a mean PaCO2 of 36.1 ± 0.8 Torr and the castrates given the placebo (N = 7) had an average PaCo2 of 43.8 ± 1.2 Torr (P <0.001). Both of these castrate groups were also different from intact, untreated males (P <0.01). Progesterone concentrations were very low and not different. When progesterone was additionally administered, the PaCO2 's fell to 33.0 ± 0.8 and 38.2 ± 0.6 Torr for the estrogen- and placebo-treated castrate groups, respectively. The male guinea pig hyperventilates when given progesterone with the magnitude and time course of his response comparable to the human's. The response to progesterone is not critically dependent on the testes or on plasma estrogen concentrations; however, both castration and exogenous estrogen appear to influence PaCO2 without altering plasma progesterone concentrations.

Original languageEnglish (US)
Pages (from-to)383-390
Number of pages8
JournalRespiration Physiology
Volume61
Issue number3
DOIs
StatePublished - 1985

Fingerprint

Castration
Progesterone
Guinea Pigs
Steroids
Estrogens
Placebos
Testis
Estradiol

Keywords

  • Castration
  • Estrogen
  • Hyperventilation
  • Progesterone

ASJC Scopus subject areas

  • Physiology
  • Pulmonary and Respiratory Medicine

Cite this

The effects of castration and sex steroids on ventilatory control in male guinea pigs. / Hohimer, Alan (Roger); Hart, Mark V.; Resko, John A.

In: Respiration Physiology, Vol. 61, No. 3, 1985, p. 383-390.

Research output: Contribution to journalArticle

Hohimer, Alan (Roger) ; Hart, Mark V. ; Resko, John A. / The effects of castration and sex steroids on ventilatory control in male guinea pigs. In: Respiration Physiology. 1985 ; Vol. 61, No. 3. pp. 383-390.
@article{ead3e55e77e6471d8c17d755abca9acf,
title = "The effects of castration and sex steroids on ventilatory control in male guinea pigs",
abstract = "Male guinea pigs (N = 7) given progesterone hyperventilate with PaCO2 fallings from control levels of 39.0 ± 0.6 (SEM) Torr to 32.0 ± 0.7 Torr after 7 days of treatment. This response was associated with a rise in plasma progesterone concentration to approximately 15 ng ml-1 and a transient rise in plasma 17β-estradiol concentrations. To determine the role of the testes in generating teh transient estrogen increase as well as the significance of estrogens to the progesterone response, male guinea pigs were castrated and treated either with estradiol or a placebo. Estrogen-treated castrates (N = 15) had a mean PaCO2 of 36.1 ± 0.8 Torr and the castrates given the placebo (N = 7) had an average PaCo2 of 43.8 ± 1.2 Torr (P <0.001). Both of these castrate groups were also different from intact, untreated males (P <0.01). Progesterone concentrations were very low and not different. When progesterone was additionally administered, the PaCO2 's fell to 33.0 ± 0.8 and 38.2 ± 0.6 Torr for the estrogen- and placebo-treated castrate groups, respectively. The male guinea pig hyperventilates when given progesterone with the magnitude and time course of his response comparable to the human's. The response to progesterone is not critically dependent on the testes or on plasma estrogen concentrations; however, both castration and exogenous estrogen appear to influence PaCO2 without altering plasma progesterone concentrations.",
keywords = "Castration, Estrogen, Hyperventilation, Progesterone",
author = "Hohimer, {Alan (Roger)} and Hart, {Mark V.} and Resko, {John A.}",
year = "1985",
doi = "10.1016/0034-5687(85)90080-5",
language = "English (US)",
volume = "61",
pages = "383--390",
journal = "Respiratory Physiology and Neurobiology",
issn = "1569-9048",
publisher = "Elsevier",
number = "3",

}

TY - JOUR

T1 - The effects of castration and sex steroids on ventilatory control in male guinea pigs

AU - Hohimer, Alan (Roger)

AU - Hart, Mark V.

AU - Resko, John A.

PY - 1985

Y1 - 1985

N2 - Male guinea pigs (N = 7) given progesterone hyperventilate with PaCO2 fallings from control levels of 39.0 ± 0.6 (SEM) Torr to 32.0 ± 0.7 Torr after 7 days of treatment. This response was associated with a rise in plasma progesterone concentration to approximately 15 ng ml-1 and a transient rise in plasma 17β-estradiol concentrations. To determine the role of the testes in generating teh transient estrogen increase as well as the significance of estrogens to the progesterone response, male guinea pigs were castrated and treated either with estradiol or a placebo. Estrogen-treated castrates (N = 15) had a mean PaCO2 of 36.1 ± 0.8 Torr and the castrates given the placebo (N = 7) had an average PaCo2 of 43.8 ± 1.2 Torr (P <0.001). Both of these castrate groups were also different from intact, untreated males (P <0.01). Progesterone concentrations were very low and not different. When progesterone was additionally administered, the PaCO2 's fell to 33.0 ± 0.8 and 38.2 ± 0.6 Torr for the estrogen- and placebo-treated castrate groups, respectively. The male guinea pig hyperventilates when given progesterone with the magnitude and time course of his response comparable to the human's. The response to progesterone is not critically dependent on the testes or on plasma estrogen concentrations; however, both castration and exogenous estrogen appear to influence PaCO2 without altering plasma progesterone concentrations.

AB - Male guinea pigs (N = 7) given progesterone hyperventilate with PaCO2 fallings from control levels of 39.0 ± 0.6 (SEM) Torr to 32.0 ± 0.7 Torr after 7 days of treatment. This response was associated with a rise in plasma progesterone concentration to approximately 15 ng ml-1 and a transient rise in plasma 17β-estradiol concentrations. To determine the role of the testes in generating teh transient estrogen increase as well as the significance of estrogens to the progesterone response, male guinea pigs were castrated and treated either with estradiol or a placebo. Estrogen-treated castrates (N = 15) had a mean PaCO2 of 36.1 ± 0.8 Torr and the castrates given the placebo (N = 7) had an average PaCo2 of 43.8 ± 1.2 Torr (P <0.001). Both of these castrate groups were also different from intact, untreated males (P <0.01). Progesterone concentrations were very low and not different. When progesterone was additionally administered, the PaCO2 's fell to 33.0 ± 0.8 and 38.2 ± 0.6 Torr for the estrogen- and placebo-treated castrate groups, respectively. The male guinea pig hyperventilates when given progesterone with the magnitude and time course of his response comparable to the human's. The response to progesterone is not critically dependent on the testes or on plasma estrogen concentrations; however, both castration and exogenous estrogen appear to influence PaCO2 without altering plasma progesterone concentrations.

KW - Castration

KW - Estrogen

KW - Hyperventilation

KW - Progesterone

UR - http://www.scopus.com/inward/record.url?scp=0022259643&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0022259643&partnerID=8YFLogxK

U2 - 10.1016/0034-5687(85)90080-5

DO - 10.1016/0034-5687(85)90080-5

M3 - Article

VL - 61

SP - 383

EP - 390

JO - Respiratory Physiology and Neurobiology

JF - Respiratory Physiology and Neurobiology

SN - 1569-9048

IS - 3

ER -