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Reproduction, Department of Obstetrics and Gynecology, Perinatal and Child Health, CHUQ Research Centre, CHUL Room T1-49, 2705 Laurier Boulevard, Québec, Québec, Canada G1V 4G2
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information regarding the molecular mechanisms that regulate its expression in Leydig cells. However, in vascular smooth muscle cells (VSMC), expression of the rat Pdgfra gene is under the positive regulatory influence of the transcription factor specificity
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has been associated with endocrine diseases such as breast and prostate cancers, and the action of ERs is linked to the growth promotion and invasion of breast cancer cells ( Pearce & Jordan 2004 ). ERs modulate the transcription of target genes when
Physiologie de la Reproduction et des Comportements – UMR 6175 INRA-CNRS-Université de Tours, Haras Nationaux, 37380 Nouzilly, France
INSERM U709 Génomique et Epigénétique des Pathologies Placentaires (Ex. U361), Hôpital Cochin, Pavillon Baudelocque, 123 Bd de Port Royal, 75014 Paris, France
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Physiologie de la Reproduction et des Comportements – UMR 6175 INRA-CNRS-Université de Tours, Haras Nationaux, 37380 Nouzilly, France
INSERM U709 Génomique et Epigénétique des Pathologies Placentaires (Ex. U361), Hôpital Cochin, Pavillon Baudelocque, 123 Bd de Port Royal, 75014 Paris, France
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Physiologie de la Reproduction et des Comportements – UMR 6175 INRA-CNRS-Université de Tours, Haras Nationaux, 37380 Nouzilly, France
INSERM U709 Génomique et Epigénétique des Pathologies Placentaires (Ex. U361), Hôpital Cochin, Pavillon Baudelocque, 123 Bd de Port Royal, 75014 Paris, France
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Physiologie de la Reproduction et des Comportements – UMR 6175 INRA-CNRS-Université de Tours, Haras Nationaux, 37380 Nouzilly, France
INSERM U709 Génomique et Epigénétique des Pathologies Placentaires (Ex. U361), Hôpital Cochin, Pavillon Baudelocque, 123 Bd de Port Royal, 75014 Paris, France
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Physiologie de la Reproduction et des Comportements – UMR 6175 INRA-CNRS-Université de Tours, Haras Nationaux, 37380 Nouzilly, France
INSERM U709 Génomique et Epigénétique des Pathologies Placentaires (Ex. U361), Hôpital Cochin, Pavillon Baudelocque, 123 Bd de Port Royal, 75014 Paris, France
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Physiologie de la Reproduction et des Comportements – UMR 6175 INRA-CNRS-Université de Tours, Haras Nationaux, 37380 Nouzilly, France
INSERM U709 Génomique et Epigénétique des Pathologies Placentaires (Ex. U361), Hôpital Cochin, Pavillon Baudelocque, 123 Bd de Port Royal, 75014 Paris, France
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Physiologie de la Reproduction et des Comportements – UMR 6175 INRA-CNRS-Université de Tours, Haras Nationaux, 37380 Nouzilly, France
INSERM U709 Génomique et Epigénétique des Pathologies Placentaires (Ex. U361), Hôpital Cochin, Pavillon Baudelocque, 123 Bd de Port Royal, 75014 Paris, France
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Physiologie de la Reproduction et des Comportements – UMR 6175 INRA-CNRS-Université de Tours, Haras Nationaux, 37380 Nouzilly, France
INSERM U709 Génomique et Epigénétique des Pathologies Placentaires (Ex. U361), Hôpital Cochin, Pavillon Baudelocque, 123 Bd de Port Royal, 75014 Paris, France
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Physiologie de la Reproduction et des Comportements – UMR 6175 INRA-CNRS-Université de Tours, Haras Nationaux, 37380 Nouzilly, France
INSERM U709 Génomique et Epigénétique des Pathologies Placentaires (Ex. U361), Hôpital Cochin, Pavillon Baudelocque, 123 Bd de Port Royal, 75014 Paris, France
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Physiologie de la Reproduction et des Comportements – UMR 6175 INRA-CNRS-Université de Tours, Haras Nationaux, 37380 Nouzilly, France
INSERM U709 Génomique et Epigénétique des Pathologies Placentaires (Ex. U361), Hôpital Cochin, Pavillon Baudelocque, 123 Bd de Port Royal, 75014 Paris, France
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Introduction Recent accumulating evidence indicates that the transcription factor FOXL2 is a crucial actor in early ovarian differentiation and maintenance. Natural mutations affecting FOXL2 have been shown to be involved in two
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function of both the CCAAT-enhancer-binding protein (C/EBP) and the JUN families of transcription factors ( Vinson et al . 1993 ) implicated in adipocyte growth and development ( Herrera et al . 1989 , Linhart et al . 2001 ). The resulting TG mice, A
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ABSTRACT
The present study examined turkey prolactin (PRL) transcription and PRL mRNA stability during different reproductive stages. Nuclear run-on transcription assays were performed using isolated nuclei from pituitaries of turkeys at different reproductive stages. Meanwhile, cytoplasmic PRL mRNA and plasma PRL were measured by slot blot and RIA respectively. The PRL transcription, pituitary cytoplasmic PRL mRNA abundance and plasma PRL levels increased after photostimulation and peaked at the incubating stage (P<0·05). A decrease in PRL transcription, pituitary cytoplasmic PRL mRNA and plasma PRL (P<0·05) was observed during the transition from incubation to photorefractoriness. Nest-deprivation reduced circulating PRL (P<0·05), whereas pituitary cytoplasmic PRL mRNA and PRL transcription were not significantly altered from those in incubating birds (P>0·05). The half-life of PRL mRNA was determined in pituitaries of non-photostimulated, laying, incubating and photorefractory hens. Primary pituitary cell cultures were treated with the transcription inhibitor actinomycin-D and the decay of the pre-existing PRL mRNA was quantified using Northern blot analysis. The PRL mRNA half-life was 1·5- and 1·4-fold greater in incubating and laying birds respectively than in non-photostimulated turkeys (P<0·05). The half-life of PRL mRNA in photorefractory and incubating hens was similar in spite of great differences in pituitary PRL mRNA steady-state levels and PRL transcription. Our data suggest that photoinduced changes in pituitary PRL mRNA and plasma PRL are due to changes in both PRL transcription and PRL mRNA stability. Nest-deprivation inhibits the PRL releasing mechanism(s) independently of PRL transcription in turkeys.
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-mediated mechanisms that involve transcriptional induction. Despite our current knowledge surrounding the regulation of the StAR gene, a complete understanding of the cAMP-dependent signaling events involved in this process is still lacking. Transcriptional
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transcriptional activation of the hMC4-R gene. Materials and methods Materials Penicillin, streptomycin, fetal calf serum (FCS), Dulbecco’s Modified Eagle’s Medium/Ham’s nutrient mixture (DMEM/F-12, 15 mM Hepes
Geriatric Research, Division of Endocrinology, Division of Gastroenterology and Hepatology, Department of Obstetrics and Gynecology, State Key Laboratory of Cellular Stress Biology, Program in Molecular Medicine, Education and Clinical Center (GRECC-182B), VA Palo Alto Health Care System, 3801 Miranda Avenue, Palo Alto, California 94304, USA
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Geriatric Research, Division of Endocrinology, Division of Gastroenterology and Hepatology, Department of Obstetrics and Gynecology, State Key Laboratory of Cellular Stress Biology, Program in Molecular Medicine, Education and Clinical Center (GRECC-182B), VA Palo Alto Health Care System, 3801 Miranda Avenue, Palo Alto, California 94304, USA
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Geriatric Research, Division of Endocrinology, Division of Gastroenterology and Hepatology, Department of Obstetrics and Gynecology, State Key Laboratory of Cellular Stress Biology, Program in Molecular Medicine, Education and Clinical Center (GRECC-182B), VA Palo Alto Health Care System, 3801 Miranda Avenue, Palo Alto, California 94304, USA
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Geriatric Research, Division of Endocrinology, Division of Gastroenterology and Hepatology, Department of Obstetrics and Gynecology, State Key Laboratory of Cellular Stress Biology, Program in Molecular Medicine, Education and Clinical Center (GRECC-182B), VA Palo Alto Health Care System, 3801 Miranda Avenue, Palo Alto, California 94304, USA
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. 2010 ). These isoforms differ in their organ/tissue distribution, regulation of kinase activation and subsequent phosphorylation of downstream substrates, kinases or transcription factors, and sensitivity to pharmacological inhibition by pyridinyl
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abundance of every single IRS protein in a specific tissue. One of the most important aspects of protein expression is its transcriptional regulation in different tissues ( Vassen et al . 1999 ). The mechanisms leading to transcriptional activation of the
Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, People’s Republic of China
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Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, People’s Republic of China
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Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, People’s Republic of China
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Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, People’s Republic of China
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Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, People’s Republic of China
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Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, People’s Republic of China
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Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, People’s Republic of China
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parturition. The signal transducer and activator of transcription 3 (STAT3) is a transcription factor, which can be activated upon phosphorylation at Tyr 705 ( Darnell 1997 ). In silico analysis of the SAA1 gene reveals putative STAT3-binding sites in