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Ingår i: Human reproduction update. - : Oxford University Press (OUP). - 1460-2369 .- 1355-4786. ; 15:3, s. 265-277
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(författare)
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Ingår i: Human reproduction update. - : Oxford University Press (OUP). - 1460-2369 .- 1355-4786. ; 15:6, s. 599-612
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Nutrition and reproduction in women
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Genetic aspects of female reproduction
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(författare)
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(författare)
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Contraception and society
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Ingår i: The European journal of contraception & reproductive health care : the official journal of the European Society of Contraception. - 1362-5187. ; 7:4, s. 199-209
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The past, present and future
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(författare)
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Marked upregulation of cholesterol 25-hydroxylase expression by lipopolysaccharide
- 2009
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Ingår i: Journal of Lipid Research. - 1539-7262 .- 0022-2275. ; 50:11, s. 2258-2264
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Tidskriftsartikel (refereegranskat)abstract
- During screening of genes upregulated by lipopolysaccharide (LPS; endotoxin) treatment of bone marrow-derived mouse macrophages, it was unexpectedly found that cholesterol 25-hydroxylase (Ch25h) was strongly upregulated. Treatment of macrophages with 10 ng/ml of LPS for 2 h resulted in a 35-fold increase in the expression of Ch25h. In contrast, LPS treatment did not increase the expression of Cyp27a1 or Cyp7b1. The increased Ch25h expression was found to be independent of Myeloid differentiation protein 88 signaling but dependent on Toll-like receptor 4 signaling. LPS treatment of macrophages caused a 6- to 7-fold increase in cellular 25-hydroxycholesterol concentration. When macrophages were treated with increasing concentrations of 25-hydroxycholesterol, a dose-dependent release of CCL5 into the culture medium was observed. Intravenous injection of LPS in eight healthy volunteers resulted in an increase in plasma 25-hydroxycholesterol concentration. The possibility is discussed that 25-hydroxycholesterol may have a role in the inflammatory response, in addition to its more established role in the regulation of cholesterol homeostasis.-Diczfalusy, U., K. E. Olofsson, A- M. Carlsson, M. Gong, D. T. Golenbock, O. Rooyackers, U. Flaring, and H. Bjorkbacka. Marked upregulation of cholesterol 25-hydroxylase expression by lipopolysaccharide. J. Lipids Res. 2009. 50: 2258-2264.
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(författare)
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Estetrol: a unique steroid in human pregnancy
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Ingår i: Climacteric : the journal of the International Menopause Society. - : Informa UK Limited. - 1473-0804. ; 1111 Suppl 1, s. 1-1
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Tidskriftsartikel (refereegranskat)
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| 44. |
- Holinka, CF, et al.
(författare)
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Estetrol: a unique steroid in human pregnancy
- 2008
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Ingår i: The Journal of steroid biochemistry and molecular biology. - : Elsevier BV. - 0960-0760. ; 110:1-2, s. 138-143
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Tidskriftsartikel (refereegranskat)
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| 47. |
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| 48. |
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| 49. |
- Mlugu, EM, et al.
(författare)
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Pregnancy Increases CYP3A Enzymes Activity as Measured by the 4β-Hydroxycholesterol/Cholesterol Ratio
- 2022
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Ingår i: International journal of molecular sciences. - : MDPI AG. - 1422-0067. ; 23:23
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Tidskriftsartikel (refereegranskat)abstract
- Changes in cortisol and other hormones during pregnancy may alter CYP3A enzymes activity, but data from sub-Saharan Africa are sparse. We investigated the effect of pregnancy and CYP3A5 genotypes on CYP3A enzymes activity using the plasma 4β-hydroxycholesterol (4β-OHC)/cholesterol (Chol) ratio, a known endogenous biomarker. Tanzanian pregnant women (n = 110) and non-pregnant women (n = 59) controls were enrolled. Plasma 4β-OHC and Chol were determined in the second and third trimesters for pregnant women and once for non-pregnant women using gas chromatography–mass spectrometry. Genotyping for CYP3A5 (*3, *6, *7) was performed. Wilcoxon Signed-Rank Test and Mann–Whitney U test were used to compare the median 4β-OHC/Chol ratio between trimesters in pregnant women and between pregnant and non-pregnant women. Repeated-measure ANOVA was used to evaluate the effect of the CYP3A5 genotypes on the 4β-OHC/Chol ratio in pregnant women. No significant effect of the pregnancy status or the CYP3A5 genotype on the cholesterol level was observed. The plasma 4β-OHC/Chol ratio significantly increased by 7.3% from the second trimester to the third trimester (p = 0.02). Pregnant women had a significantly higher mean 4β-OHC/Chol ratio than non-pregnant women, (p < 0.001). In non-pregnant women, the mean 4β-OHC/Chol ratio was significantly lower in carriers of defective CYP3A5 alleles (*3, *6 or *7) as compared to women with the CYP3A5*1/*1 genotypes (p = 0.002). Pregnancy increases CYP3A enzymes activity in a gestational-stage manner. The CYP3A5 genotype predicts CYP3A enzymes activity in the black Tanzanian population, but not during pregnancy-mediated CYP3A enzyme induction.
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