A TA-repeat polymorphism in the gene for the estrogen receptor alpha does not correlate with muscle strength or body composition in young adult Swedish women.

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MARC

Grundberg, ElinUppsala universitet,Institutionen för medicinska vetenskaper (author)

A TA-repeat polymorphism in the gene for the estrogen receptor alpha does not correlate with muscle strength or body composition in young adult Swedish women.

Article/chapterEnglish2005

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2005
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LIBRIS-ID:oai:DiVA.org:uu-69694
https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-69694URI

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Language:English
Summary in:English

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Subject category:ref swepub-contenttype
Subject category:art swepub-publicationtype

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OBJECTIVES: There are conflicting data in the literature whether estrogens affect muscle strength. Prospective studies with hormone replacement therapy have not been able to convincingly demonstrate a muscular effect and the putative role of estrogen in the development of lean body mass is not established. Both lean mass and fat mass are known to be under strong genetic control and therefore we have investigated the relation between a TA-repeat in the gene for the estrogen receptor alpha (ERalpha) and muscle strength and body composition. METHODS: 175 healthy Swedish women, aged 20-39 were randomly selected from the population registry and included in the study. Body mass measurements (lean mass, fat mass, body weight and BMI) and muscle strength (quadriceps, hamstring and grip strength) were evaluated. The TA-repeat in the ERalpha gene was amplified by polymerase chain reaction. RESULTS: Alleles with a TA-repeat length of 16 repeats or shorter were denoted short (e), and repeat length of 17 repeats or longer were denoted long (E). Women homozygous for the short and long genotype were denoted ee (31%) and EE (21%), respectively, while heterozygous individuals were denoted Ee (48%). The frequencies were in Hardy-Weinberg equilibrium. No associations were found between ERalpha genotypes and muscle strength or body composition. CONCLUSION: The TA-repeat in the human ERalpha gene does not correlate with muscle strength or body mass measurements, indicating that body composition is not as sensitive to genetic variation in this receptor as other target organs for estrogen.

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Ribom, Eva LUppsala universitet,Institutionen för kirurgiska vetenskaper,Ortopedi (author)
Brändström, HelenaUppsala universitet,Institutionen för medicinska vetenskaper(Swepub:uu)helebran (author)
Ljunggren, OstenUppsala universitet,Institutionen för medicinska vetenskaper(Swepub:uu)osteljun (author)
Mallmin, HansUppsala universitet,Institutionen för kirurgiska vetenskaper,Ortopedi(Swepub:uu)hansmall (author)
Kindmark, AndreasUppsala universitet,Institutionen för medicinska vetenskaper(Swepub:uu)andrkind (author)
Uppsala universitetInstitutionen för medicinska vetenskaper (creator_code:org_t)

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In:Maturitas50:3, s. 153-600378-5122

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