Feeding daidzein to late pregnant sows influences the estrogen receptor beta and type 1 insulin-like growth factor receptor mRNA expression in newborn piglets
| Autor: | Gerd Nürnberg, J Wegner, Klaus Ender, Gerda Kuhn, J Chen, Mingqiang Ren |
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| Rok vydání: | 2001 |
| Předmět: |
Male
endocrine system medicine.medical_specialty Swine medicine.drug_class Endocrinology Diabetes and Metabolism Hypothalamus Gene Expression Thymus Gland Biology Polymerase Chain Reaction Receptor IGF Type 1 Embryonic and Fetal Development chemistry.chemical_compound Endocrinology Growth factor receptor Pregnancy Internal medicine Gene expression Image Processing Computer-Assisted medicine Animals Estrogen Receptor beta RNA Messenger Muscle Skeletal Receptor Estrogen receptor beta Analysis of Variance Daidzein food and beverages Skeletal muscle Isoflavones medicine.anatomical_structure Animals Newborn Liver Receptors Estrogen chemistry Estrogen Pituitary Gland Dietary Supplements Female hormones hormone substitutes and hormone antagonists |
| Zdroj: | Journal of Endocrinology. 170:129-135 |
| ISSN: | 1479-6805 0022-0795 |
| DOI: | 10.1677/joe.0.1700129 |
| Popis: | The present study was undertaken to determine the tissue-specific expression of estrogen receptor beta (ERbeta), and the effects of a daidzein supplement to the diet of pregnant sows on the expression of ERbeta, and type 1 insulin-like growth factor receptor (IGF-1R) genes in newborn piglets by using semi-quantitative RT-PCR. Eight sows received a dietary supplement of daidzein at a dosage of 8 mg per kg feed from day 85 of gestation, and six sows were used as controls. After parturition, 2 male neonatal piglets were selected from each litter for sampling. ERbeta mRNA was detected in intestine, lung, thymus, kidney, pituitary and hypothalamus tissues, but not in heart, adrenal, skeletal muscle, liver or placental tissues. Daidzein treatment significantly increased the birth weight of male piglets and markedly reduced the level of ERbeta mRNA in the hypothalamus, but not in the pituitary. An up-regulation of IGF-1R gene transcription was observed in skeletal muscles of newborn piglets. In addition, the IGF-1R mRNA was found to be most abundant in pituitary and hypothalamus, followed by skeletal muscle, thymus, and liver tissues in decreasing order. Our results demonstrate that (1) ERbeta is expressed in a tissue-specific manner in newborn piglets, (2) daidzein down-regulates ERbeta gene expression in the hypothalamus, possibly indicating central effects of daidzein, and (3) daidzein influences fetal growth associated with higher IGF-IR gene expression in skeletal muscle. |
| Databáze: | OpenAIRE |
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