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- Alexanderson, Camilla, 1978, et al.
(författare)
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A single early postnatal estradiol injection affects morphology and gene expression of the ovary and parametrial adipose tissue in adult female rats.
- 2010
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Ingår i: The Journal of steroid biochemistry and molecular biology. - : Elsevier BV. - 1879-1220 .- 0960-0760. ; 122:1-3, s. 82-90
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Tidskriftsartikel (refereegranskat)abstract
- Events during early life can affect reproductive and metabolic functions in adulthood. We evaluated the programming effects of a single early postnatal estradiol injection (within 3h after birth) in female rats. We assessed ovarian and parametrial adipose tissue morphology, evaluated gene expression related to follicular development and adipose tissue metabolism, and developed a non-invasive volumetric estimation of parametrial adipose tissue by magnetic resonance imaging. Estradiol reduced ovarian weight, increased antral follicle size and number of atretic antral follicles, and decreased theca interna thickness in atretic antral follicles. Adult estradiol-injected rats also had malformed vaginal openings and lacked corpora lutea, confirming anovulation. Estradiol markedly reduced parametrial adipose tissue mass. Adipocyte size was unchanged, suggesting reduced adipocyte number. Parametrial adipose tissue lipoprotein lipase activity was increased. In ovaries, estradiol increased mRNA expression of adiponectin, complement component 3, estrogen receptor alpha, and glucose transporter 3 and 4; in parametrial adipose tissue, expression of complement component 3 was increased, expression of estrogen receptor alpha was decreased, and expression of leptin, lipoprotein lipase, and hormone-sensitive lipase was unaffected. These findings suggest that early postnatal estradiol exposure of female rats result in long-lasting effects on the ovary and parametrial adipose tissue at adult age.
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| 2. |
- Brunius, Carl, et al.
(författare)
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Feeding dried chicory root to pigs decrease androstenone accumulation in fat by increasing hepatic 3 beta hydroxysteroid dehydrogenase expression
- 2012
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Ingår i: Journal of Steroid Biochemistry and Molecular Biology. - : Elsevier BV. - 0960-0760 .- 1879-1220. ; 130, s. 90-95
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Tidskriftsartikel (refereegranskat)abstract
- The present study investigated the in vivo effect of chicory root on testicular steroid concentrations and androstenone metabolizing enzymes in entire male pigs. Furthermore, the effect on skatole and indole concentrations in plasma and adipose tissue was investigated. The pigs were divided into two groups; one receiving experimental feed containing 10% dried chicory root for 16 days before slaughter, the control group was fed a standard diet. Plasma, adipose and liver tissue samples were collected at slaughter. Plasma was analyzed for the concentration of testosterone, estradiol, insulin-like growth factor 1 (IGF-1), skatole and indole. Adipose tissue was analyzed for the concentration of androstenone, skatole and indole, while the liver tissue was analyzed for mRNA and protein expressions of 3 beta-hydroxysteroid dehydrogenase (3 beta-HSD), sulfotransferase 2A1 and heat-shock protein 70 (HSP70). The results showed that the androstenone concentrations in the adipose tissue of chicory fed pigs were significantly (p < 0.05) lower and indole concentrations were higher (p < 0.05) compared to control fed pigs. Moreover the chicory root fed pigs had increased mRNA and protein expression of 3 beta-HSD and decreased HSP70 expression (p < 0.05). Testosterone and IGF-1 concentrations in plasma as well as skatole concentrations in adipose tissue were not altered by dietary intake of chicory root. It is concluded that chicory root in the diet reduces the concentration of androstenone in adipose tissue via induction of 3 beta-HSD, and that these changes were not due to increased cellular stress. (C) 2012 Elsevier Ltd. All rights reserved.
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| 6. |
- Fernández-Calero, Tamara, et al.
(författare)
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The transcriptional activities and cellular localization of the human estrogen receptor alpha are affected by the synonymous Ala87 mutation.
- 2014
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Ingår i: Journal of Steroid Biochemistry and Molecular Biology. - : Elsevier BV. - 1879-1220 .- 0960-0760. ; 143:Mar 4, s. 99-104
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Tidskriftsartikel (refereegranskat)abstract
- Until recently, synonymous mutations (which do not change amino acids) have been much neglected. Some evidence suggests that this kind of mutations could affect mRNA secondary structure or stability, translation kinetics and protein structure. To explore deeper the role of synonymous mutations, we studied their consequence on the functional activity of the estrogen receptor alpha (ERα). The ERα is a ligand-inducible transcription factor that orchestrates pleiotropic cellular effects, at both genomic and non-genomic levels in response to estrogens. In this work we analyzed in transient transfection experiments, the activity of ERα carrying the synonymous mutation Ala87, a polymorphism involving about 5-10% of the population. In comparison to the wild type receptor, our results show that ERαA87 mutation reduces the transactivation efficiency of ERα on an ERE reporter gene while its expression level remains similar. This mutation enhances 4-OHT-induced transactivation of ERα on an AP1 reporter gene. Finally, the mutation affects the subcellular localization of ERα in a cell type specific manner. It enhances the cytoplasmic location of ERα without significant changes in non-genomic effects of E2. The functional alteration of the ERαA87 determined in this work highlights the relevance of synonymous mutations for biomedical and pharmacological points of view.
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| 8. |
- Gustafsson, JA
(författare)
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Elwood V. Jensen memorial letter
- 2013
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Ingår i: JOURNAL OF STEROID BIOCHEMISTRY AND MOLECULAR BIOLOGY. - : Elsevier BV. - 0960-0760. ; 137, s. 3-4
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)
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| 9. |
- Humble, Mats B., 1952-, et al.
(författare)
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Low serum levels of 25-hydroxyvitamin D (25-OHD) among psychiatric out-patients in Sweden : Relations with season, age, ethnic origin and psychiatric diagnosis
- 2010
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Ingår i: Journal of Steroid Biochemistry and Molecular Biology. - Oxford, United Kingdom : Elsevier BV. - 0960-0760 .- 1879-1220. ; 121:1-2, s. 467-470
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Tidskriftsartikel (refereegranskat)abstract
- In a chart review at a psychiatric out-patient department, latitude 59.3 degrees N, a sample of patients with tests of serum 25-hydroxy-vitamin D (25-OHD) and plasma intact parathyroid hormone (iPTH) was collected, together with demographic data and psychiatric diagnoses. During 19 months, 117 patients were included. Their median 25-0HD was 45 nmol/l; considerably lower than published reports on Swedish healthy populations. Only 14.5% had recommended levels (over 75). In 56.4%, 25-OHD was under 50 nmol/l, which is related to several unfavourable health outcomes. Seasonal variation of 25-OHD was blunted. Patients with ADHD had unexpectedly low iPTH levels. Middle East, South-East Asian or African ethnic origin, being a young male and having a diagnosis of autism spectrum disorder or schizophrenia predicted low 25-OHD levels. Hence, the diagnoses that have been hypothetically linked to developmental (prenatal) vitamin D deficiency, schizophrenia and autism, had the lowest 25-OHD levels in this adult sample, supporting the notion that vitamin D deficiency may not only be a predisposing developmental factor but also relate to the adult patients' psychiatric state. This is further supported by the considerable psychiatric improvement that coincided with vitamin D treatment in some of the patients whose deficiency was treated.
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