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https://www.readbyqxmd.com/read/29790386/estrogen-biosynthesis-in-breast-adipose-tissue-during-menstrual-cycle-in-women-with-and-without-breast-cancer
#1
Hanna Savolainen-Peltonen, Veera Vihma, Feng Wang, Ursula Turpeinen, Esa Hämäläinen, Mikko Haanpää, Marjut Leidenius, Matti J Tikkanen, Tomi S Mikkola
Circulating estrogens fluctuate during the menstrual cycle but it is not known whether this fluctuation is related to local hormone levels in adipose tissue. We analyzed estrogen concentrations and gene expression of estrogen-regulating enzymes in breast subcutaneous adipose tissue in premenopausal women with (n = 11) and without (n = 17) estrogen receptor-positive breast cancer. Estrone (E1 ) was the predominant estrogen in premenopausal breast adipose tissue, and E1 and mRNA expression of CYP19A1 in adipose tissue correlated positively with BMI...
May 23, 2018: Gynecological Endocrinology
https://www.readbyqxmd.com/read/29775928/tributyltin-impaired-reproductive-success-in-female-zebrafish-through-disrupting-oogenesis-reproductive-behaviors-and-serotonin-synthesis
#2
Wei-Yang Xiao, Ying-Wen Li, Qi-Liang Chen, Zhi-Hao Liu
Tributyltin (TBT), an organotin acting as aromatase (Cyp19a1) inhibitor, has been found to disrupt gametogenesis and reproductive behaviors in several fish species. However, few studies addressing the mechanisms underlying the impaired gametogenesis and reproduction have been reported. In this study, female adults of zebrafish (Danio rerio) were continuously exposed to two nominal concentrations of TBT (100 and 500 ng/L, actual concentrations: 90.8 ± 1.3 ng/L and 470.3 ± 2.7 ng/L, respectively) for 28 days...
May 12, 2018: Aquatic Toxicology
https://www.readbyqxmd.com/read/29772405/a-transcriptomic-comparison-of-theca-and-granulosa-cells-in-chicken-and-cattle-follicles-reveals-esr2-as-a-potential-regulator-of-cyp19a1-expression-in-the-theca-cells-of-chicken-follicles
#3
Ruoxi Jing, Lantao Gu, Jinqiu Li, Yanzhang Gong
Previous studies have shown that theca and granulosa cell layers in follicles do not play the same roles in mammals and birds, especially regarding the synthesis of estrogen. The functions of these two cell types have been well characterized in cattle, but they remain unclear in chickens. To clarify this issue, a comparison of small yellow follicles (SYFs) in chickens and cattle at different follicular development stages was done by weighted gene co-expression network analysis (WGCNA). The modules obtained from WGCNA were used for further identification of the key genes associated with CYP19A1 expression...
April 28, 2018: Comparative Biochemistry and Physiology. Part D, Genomics & Proteomics
https://www.readbyqxmd.com/read/29770127/temporal-expression-patterns-of-genes-related-to-sex-steroid-action-in-sexually-dimorphic-nuclei-during-puberty
#4
Moeko Kanaya, Masahiro Morishita, Shinji Tsukahara
Sex steroids play a major role in sexually dimorphic brain development during not only the perinatal period but also the pubertal period. We previously showed that, in male mice, the estrogen receptor-α ( Esr1 ) and aromatase ( Cyp19a1 ) genes are essential to the sexually dimorphic formation of the anteroventral periventricular nucleus (AVPV) and the principal nucleus of the bed nucleus of the stria terminalis (BNSTp), but the estrogen receptor-β ( Esr2 ) gene is not necessary. We also showed that the androgen receptor ( Ar ) gene is essential to the sexually dimorphic formation of the BNSTp...
2018: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/29736687/cyclooxygenase-and-lipoxygenase-gene-expression-in-the-inflammogenesis-of-breast-cancer
#5
Brian M Kennedy, Randall E Harris
We examined the expression of major inflammatory genes, cyclooxygenase-1 and 2 (COX1, COX2) and arachidonate 5-lipoxygenase (ALOX5) in 1090 tumor samples of invasive breast cancer from The Cancer Genome Atlas (TCGA). Mean cyclooxygenase expression (COX1 + COX2) ranked in the upper 99th percentile of all 20,531 genes and surprisingly, the mean expression of COX1 was more than tenfold higher than COX2. Highly significant correlations were observed between COX2 with eight tumor-promoting genes (EGR2, IL6, RGS2, B3GNT5, SGK1, SLC2A3, SFRP1 and ETS2) and between ALOX5 and ten tumor promoter genes (CD33, MYOF1, NLRP1, GAB3, CD4, IFR8, CYTH4, BTK, FGR, CD37)...
May 7, 2018: Inflammopharmacology
https://www.readbyqxmd.com/read/29728128/the-ovarian-estrogen-synthesis-function-was-impaired-in-y123f-mouse-and-partly-restored-by-exogenous-fsh-supplement
#6
Xiaoyu Tu, Miao Liu, Jianan Tang, Yu Zhang, Yan Shi, Lin Yu, Zhaogui Sun
BACKGROUND: LepR tyrosine site mutation mice (Y123F) exhibit decreased serum E2 levels, immature reproductive organs, infertility as well as metabolic abnormalities. Although the actions of leptin and lepR in the control of reproductive function are thought to be exerted mainly via the hypothalamic-pituitary-gonadal axis, relatively less is known regarding their local effects on the peripheral ovary, especially on steroid hormone synthesis. Meanwhile, whether the decreased fertility of Y123F mouse could be restored by gonadotropin has not been clear yet...
May 4, 2018: Reproductive Biology and Endocrinology: RB&E
https://www.readbyqxmd.com/read/29723543/the-transcription-factor-smad4-and-mir-10b-contribute-to-e2-release-and-cell-apoptosis-in-ovarian-granulosa-cells-by-targeting-cyp19a1
#7
Qiqi Li, Xing Du, Zengxiang Pan, Lifan Zhang, Qifa Li
The cytochrome P450 family 19 subfamily A member 1 (CYP19A1) gene, encodes aromatase, a key enzyme in estradiol (E2) synthesis, and is down-regulated during porcine follicular atresia. However, its role in and the mechanism of transcriptional repression in follicular atresia is largely unknown. In the present study, we show that the CYP19A1 gene stimulates E2 release and inhibits cell apoptosis in porcine granulosa cells (GCs). SMAD4, an anti-apoptotic moderator, was identified as a transcription factor of the porcine CYP19A1 gene and enhanced the expression and function of CYP19A1 in porcine GCs through direct binding to a SMAD4-binding element (SBE) within the promoter region of CYP19A1 gene...
April 30, 2018: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/29720337/insulin-promotes-preantral-follicle-growth-and-antrum-formation-through-temporal-expression-of-genes-regulating-steroidogenesis-and-water-transport-in-the-cat
#8
Chommanart Thongkittidilok, Ram Pratap Singh, Pierre Comizzoli, David Wildt, Nucharin Songsasen
The aims of the present study were to determine the effects of insulin, invitro, on: (1) the viability and growth of domestic cat ovarian follicles; (2) mRNA expression of genes regulating steroidogenesis (cytochrome P450 family 17 subfamily, A polypeptide 1 (Cyp17a1), cytochrome P450 family 19 subfamily, A polypeptide 1 (Cyp19a1) and steroidogenic acute regulatory protein (Star)) and water transport (aquaporins (AQPs) Aqp1, Aqp3, Aqp7, Aqp9); and (3) steroid production (17β-oestradiol (E2), progesterone (P4), androstenedione (A4))...
May 3, 2018: Reproduction, Fertility, and Development
https://www.readbyqxmd.com/read/29718108/the-antiepileptic-drug-lamotrigine-inhibits-the-cyp17a1-lyase-reaction-in-vitro
#9
Cecilie Hurup Munkboel, Lise Rudbæk Christensen, Julie Islin, Silvia Bonomo, Lars Olsen, Flemming Steen Jørgensen, Bjarne Styrishave
The potential endocrine disrupting effects of the commonly prescribed anti-epileptic drug lamotrigine (LAM) was investigated using the H295R steroidogenic in vitro assay and computational chemistry methods. The H295R cells were exposed to different concentrations of LAM and a multi-steroid LC-MS/MS method was applied to quantify the amount of secreted steroid hormones. LAM affected several steroid hormones in the steroidogenesis at therapeutic concentrations. All progestagens as well as 11-deoxycorticosterone and corticosterone increased 100-200% with increasing concentrations of LAM suggesting a selective inhibitory effect of LAM on CYP17A1, in particular on the lyase reaction...
April 26, 2018: Biology of Reproduction
https://www.readbyqxmd.com/read/29697878/connexin-43-coupling-in-bovine-cumulus-cells-during-the-follicular-growth-phase-and-its-relationship-to-in-vitro-embryo-outcomes
#10
Casey C Read, Gabby Willhelm, Paul W Dyce
Gap junctional coupling between cumulus cells is required for oocytes to reach developmental competence. Multiple connexins, which form these gap junctions, have been found within the ovarian follicles of several species including bovine. The aim of this study was to determine the role of connexin 43 (CX43) and its relationship to embryo development, following in vitro fertilization (IVF). Cumulus-oocyte-complexes (COCs) were obtained from abattoir sourced, mixed breed, bovine ovaries. COCs were isolated from follicles ranging from 2-5mm in size, representing the preselected follicle pool...
April 26, 2018: Molecular Reproduction and Development
https://www.readbyqxmd.com/read/29684814/transcriptional-and-translational-abundance-of-bone-morphogenetic-protein-bmp-2-4-6-7-and-their-receptors-bmpr1a-1b-and-bmpr2-in-buffalo-ovarian-follicle-and-the-role-of-bmp4-and-bmp7-on-estrogen-production-and-survival-of-cultured-granulosa-cells
#11
G Rajesh, S R Mishra, A Paul, M Punetha, G M Vidyalakshmi, K Narayanan, S Bag, S K Bhure, V Singh Chouhan, V P Maurya, G Singh, Mihir Sarkar
BMPs and their receptors modulate the granulosa cell (GC) function in the follicle of domestic animals. Since little is known on BMPs in the buffalo, the present study was aimed to investigate the expression of BMP2, 4, 6, 7 and their receptors BMPR1A, BMPR1B, BMPR2 in the GC and theca cells (TC) of ovarian follicles and the role of BMP4 and BMP7 on buffalo GC. Follicles were classified into four groups based on size and E2 level in the follicular fluid as follows: (i) Group1(4-6 mm; <0.5 ng/mL) (ii) Group 2 (7-9 mm; 0...
April 16, 2018: Research in Veterinary Science
https://www.readbyqxmd.com/read/29676471/vitamin-d3-regulates-steroidogenesis-in-granulosa-cells-through-amp-activated-protein-kinase-ampk-activation-in-a-mouse-model-of-polycystic-ovary-syndrome
#12
Shabnam Bakhshalizadeh, Fardin Amidi, Reza Shirazi, Maryam Shabani Nashtaei
Polycystic ovary syndrome (PCOS) is an endocrine and metabolic disorder in reproductive-aged women. Hormonal abnormality caused by steroidogenesis disturbances appears to be the main culprit of the clinical picture in PCOS. Vitamin D3 could regulate steroidogenesis in granulosa cells, but the mechanism of action of vitamin D3 on steroidogenesis remains unknown. AMP-activated protein kinase (AMPK) has a modulating role in steroid hormone production. We investigated the effect of vitamin D3 on steroidogenesis in cultured granulosa cells of dehydroepiandrosterone-induced PCOS mice and studied the involvement of AMPK signalling pathway in the current process...
April 20, 2018: Cell Biochemistry and Function
https://www.readbyqxmd.com/read/29674607/up-regulation-of-long-noncoding-rna-sra-promotes-cell-growth-inhibits-cell-apoptosis-and-induces-secretion-of-estradiol-and-progesterone-in-ovarian-granular-cells-of-mice
#13
Yan Li, Haixu Wang, Dangxia Zhou, Ting Shuang, Haibo Zhao, Biliang Chen
BACKGROUND Increasing evidence indicates that long noncoding RNAs (LncRNAs) play a key role in multiple pathological processes. It has been shown that LncRNA steroid receptor RNA activator (SRA) is elevated in peripheral blood of patients with polycystic ovary syndrome (PCOS). The aim of this study was to assess the effect of elevated LncRNA SRA on ovarian granular cells of mice in vitro. MATERIAL AND METHODS We firstly isolated granular cells from mouse ovaries and over-expressed the LncRNA SRA by means of lentiviral transfection in this cell line...
April 20, 2018: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/29668837/comprehensive-analysis-of-long-non-coding-rna-and-mrna-expression-patterns-in-sheep-testicular-maturation
#14
Hua Yang, Feng Wang, Fengzhe Li, Caifang Ren, Jing Pang, Yongjie Wan, Ziyu Wang, Xu Feng, Yanli Zhang
Long non-coding RNAs (LncRNAs) have been identified as important regulators of testis development, however, their expression patterns and roles in sheep are not yet clear. Thus, we used stranded specific RNA-seq to profile the testis transcriptome (lncRNAs and mRNAs) in premature and mature sheep. Hormone levels and the testis index were examined, and histological analyses were performed at five stages of testis development, 5-day-old (D5), 3-month-old (3M), 6-month-old (6M), 9-month-old (9M) and 2-year-old (2Y), the results of which indicate a significant difference in hormone levels and testis morphometries between the 3M and 9M stages (P < 0...
April 14, 2018: Biology of Reproduction
https://www.readbyqxmd.com/read/29667754/estrogen-regulated-expression-of-p450arom-genes-in-the-brain-and-ovaries-of-adult-female-indian-climbing-perch-anabas-testudineus
#15
Puja Pal, Sujata Roy Moulik, Shreyasi Gupta, Payel Guha, Suravi Majumder, Sourav Kundu, Buddhadev Mallick, Kousik Pramanick, Dilip Mukherjee
Cytochrome P450arom (CYP19), a product of cyp19a1 gene, catalyzes the conversion of androgens to estrogens and is essential for regulation of reproductive function in vertebrates. In the present study, we isolated partial cDNA encoding the ovarian (cyp19a1a) and brain (cyp19a1b) P450arom genes from adult female perch, Anabas testudineus and investigated their regulation by estrogen in vivo. Results demonstrated that cyp19a1a and cyp19a1b predominate in ovary and brain respectively, with quantity of both attuned to reproductive cycle...
April 18, 2018: Journal of Experimental Zoology. Part A, Ecological and Integrative Physiology
https://www.readbyqxmd.com/read/29616724/sex-determination-and-gonadal-sex-differentiation-in-the-chicken-model
#16
Claire E Hirst, Andrew T Major, Craig A Smith
Our understanding of avian sex determination and gonadal development is derived primarily from the studies in the chicken. Analysis of gynandromorphic chickens and experimental chimeras indicate that sexual phenotype is at least partly cell autonomous in the chicken, with sexually dimorphic gene expression occurring in different tissue and different stages. Gonadal sex differentiation is just one of the many manifestations of sexual phenotype. As in other birds, the chicken has a ZZ male: ZW female sex chromosome system, in which the male is the homogametic sex...
2018: International Journal of Developmental Biology
https://www.readbyqxmd.com/read/29613814/grape-seed-procyanidins-extract-attenuates-cisplatin-induced-oxidative-stress-and-testosterone-synthase-inhibition-in-rat-testes
#17
Minmin Tian, Fangfang Liu, Han Liu, Qiong Zhang, Lei Li, Xiangbo Hou, Jianxin Zhao, Sheng Li, Xuhong Chang, Yingbiao Sun
Cisplatin (CIS) is widely applied for its antihematological malignancies properties and as antisolid tumors drugs. However, it could cause testicular damage related with oxidative stress and testosterone synthesis disorder. Studies reported that grape seed procyanidins extract (GSPE) could improve CIS induced-testes lesion via scavenging free radicals in animals, although its mechanisms were unclear. Therefore, the purpose of the present study was to explore the antagonistic mechanisms of GSPE on CIS-induced testes lesion...
April 3, 2018: Systems Biology in Reproductive Medicine
https://www.readbyqxmd.com/read/29574358/hormonal-changes-and-folliculogenesis-in-female-offspring-of-rats-exposed-to-cadmium-during-gestation-and-lactation
#18
Zhiliang Li, Teng Li, Yang Leng, Shaomin Chen, Qunxing Liu, Jianfeng Feng, Hongxia Chen, Yadong Huang, Qihao Zhang
It has been suggested that the toxic effects of cadmium (Cd) may disrupt ovarian and uterine functions in adults. However, Cd exposure during gestation and lactation and its effects on the reproductive development in female offspring is still not clear, and the mechanisms underlying exposure toxicology remain mostly unexplored. To investigate how Cd exposure of female rats (F0) during gestation and lactation affects the reproductive development of their female offspring, we studied the steroidogenesis, folliculogenesis, puberty onset, and litter size of the first (F1) and second (F2) filial generations following F0 female rats which had been exposed to CdCl2 ...
March 22, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29564739/genetic-association-study-from-north-india-to-analyze-association-of-cyp19a1-and-cyp17a1-with-polycystic-ovary-syndrome
#19
Ratneev Kaur, Tajinder Kaur, Anupam Kaur
PURPOSE: Polycystic ovary syndrome (PCOS) is a complex multifactorial endocrine disorder affecting approximately 5-10% of women of reproductive age. Affected women have menstrual disturbances due to anovulation, infertility, and hyperandrogenism. Ovarian androgen overproduction is the key physiopathologic feature of PCOS. A number of genes encoding major enzymes of the androgen metabolic pathways, such as HSD17B6, CYP19A1, CYP11A1, CYP17A1, and INSR, have been examined. Very few studies have been done in North India...
March 22, 2018: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/29555404/effects-of-dietary-crude-oil-exposure-on-molecular-and-physiological-parameters-related-to-lipid-homeostasis-in-polar-cod-boreogadus-saida
#20
Ireen Vieweg, Eider Bilbao, James P Meador, Ibon Cancio, Morgan Lizabeth Bender, Miren P Cajaraville, Jasmine Nahrgang
Polar cod is an abundant Arctic key species, inhabiting an ecosystem that is subjected to rapid climate change and increased petroleum related activities. Few studies have investigated biological effects of crude oil on lipid metabolism in this species, despite lipids being a crucial compound for Arctic species to adapt to the high seasonality in food abundance in their habitat. This study examines the effects of dietary crude oil exposure on transcription levels of genes related to lipid metabolism (peroxisome proliferator-activated receptors [ppar-α, ppar-γ], retinoic X receptor [rxr-β], palmitoyl-CoA oxidase [aox1], cytochrome P4507A1 [cyp7α1]), reproduction (vitellogenin [vtg-β], gonad aromatase [cyp19a1]) and biotransformation (cytochrome P4501A1 [cyp1a1], aryl hydrocarbon receptor [ahr2])...
April 2018: Comparative Biochemistry and Physiology. Toxicology & Pharmacology: CBP
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