Effects of estrogen replacement and lower androgen status on skeletal muscle collagen and myofibrillar protein synthesis in postmenopausal women

M Hansen; D Skovgaard; S Reitelseder; Lars Holm; H. Langberg; Michael Kjær

doi:10.1093/gerona/gls007

Effects of estrogen replacement and lower androgen status on skeletal muscle collagen and myofibrillar protein synthesis in postmenopausal women

M Hansen, D Skovgaard, S Reitelseder, Lars Holm, H. Langberg, Michael Kjær

25 Citationer (Scopus)

Abstract

Our aim was to determine synthesis rate of myofibrillar and collagen proteins in 20 postmenopausal women, who were either nonusers (Controls) or users of estrogen replacement therapy (ERT) after hysterectomy/oophorectomy. Myofibrillar and muscle collagen protein fractional synthesis rate (FSR) were determined in a nonexercised leg and 24 hours after exercise in the contralateral leg. A significant interaction between treatment and mechanical loading was observed in myofibrillar protein FSR. At rest, myofibrillar protein FSR was found to be lower in ERT users than in Controls. Exercise enhanced myofibrillar protein FSR only in ERT users. Similarly, muscle collagen FSR tended to be lower in ERT users compared with Controls. In ERT participants, the androgen profile was reduced, whereas estradiol and sex hormone-binding globulin were higher. In conclusion, at rest, myofibrillar protein FSR was lower in hysterectomized/oophorectomized women using ERT compared with healthy postmenopausal women. Nevertheless, resistance exercise in combination with ERT seems to have a counteracting effect on myofibrillar FSR in hysterectomized/oophorectomized women.

Originalsprog	Engelsk
Tidsskrift	The journals of gerontology. Series A, Biological sciences and medical sciences
Vol/bind	67
Udgave nummer	10
Sider (fra-til)	1005-1013
Antal sider	9
DOI	https://doi.org/10.1093/gerona/gls007
Status	Udgivet - okt. 2012

Adgang til dokumentet

10.1093/gerona/gls007

Citationsformater

Hansen, M., Skovgaard, D., Reitelseder, S., Holm, L., Langberg, H., & Kjær, M. (2012). Effects of estrogen replacement and lower androgen status on skeletal muscle collagen and myofibrillar protein synthesis in postmenopausal women. The journals of gerontology. Series A, Biological sciences and medical sciences, 67(10), 1005-1013. https://doi.org/10.1093/gerona/gls007

Effects of estrogen replacement and lower androgen status on skeletal muscle collagen and myofibrillar protein synthesis in postmenopausal women. / Hansen, M; Skovgaard, D; Reitelseder, S et al.

I: The journals of gerontology. Series A, Biological sciences and medical sciences, Bind 67, Nr. 10, 10.2012, s. 1005-1013.

Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › peer review

Hansen, M, Skovgaard, D, Reitelseder, S, Holm, L, Langberg, H & Kjær, M 2012, 'Effects of estrogen replacement and lower androgen status on skeletal muscle collagen and myofibrillar protein synthesis in postmenopausal women', The journals of gerontology. Series A, Biological sciences and medical sciences, bind 67, nr. 10, s. 1005-1013. https://doi.org/10.1093/gerona/gls007

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abstract = "Our aim was to determine synthesis rate of myofibrillar and collagen proteins in 20 postmenopausal women, who were either nonusers (Controls) or users of estrogen replacement therapy (ERT) after hysterectomy/oophorectomy. Myofibrillar and muscle collagen protein fractional synthesis rate (FSR) were determined in a nonexercised leg and 24 hours after exercise in the contralateral leg. A significant interaction between treatment and mechanical loading was observed in myofibrillar protein FSR. At rest, myofibrillar protein FSR was found to be lower in ERT users than in Controls. Exercise enhanced myofibrillar protein FSR only in ERT users. Similarly, muscle collagen FSR tended to be lower in ERT users compared with Controls. In ERT participants, the androgen profile was reduced, whereas estradiol and sex hormone-binding globulin were higher. In conclusion, at rest, myofibrillar protein FSR was lower in hysterectomized/oophorectomized women using ERT compared with healthy postmenopausal women. Nevertheless, resistance exercise in combination with ERT seems to have a counteracting effect on myofibrillar FSR in hysterectomized/oophorectomized women. ",

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AU - Langberg, H.

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AB - Our aim was to determine synthesis rate of myofibrillar and collagen proteins in 20 postmenopausal women, who were either nonusers (Controls) or users of estrogen replacement therapy (ERT) after hysterectomy/oophorectomy. Myofibrillar and muscle collagen protein fractional synthesis rate (FSR) were determined in a nonexercised leg and 24 hours after exercise in the contralateral leg. A significant interaction between treatment and mechanical loading was observed in myofibrillar protein FSR. At rest, myofibrillar protein FSR was found to be lower in ERT users than in Controls. Exercise enhanced myofibrillar protein FSR only in ERT users. Similarly, muscle collagen FSR tended to be lower in ERT users compared with Controls. In ERT participants, the androgen profile was reduced, whereas estradiol and sex hormone-binding globulin were higher. In conclusion, at rest, myofibrillar protein FSR was lower in hysterectomized/oophorectomized women using ERT compared with healthy postmenopausal women. Nevertheless, resistance exercise in combination with ERT seems to have a counteracting effect on myofibrillar FSR in hysterectomized/oophorectomized women.

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