Abstract：
:The FOXO1 transcription factor is important for multiple aspects of reproductive function. We previously reported that FOXO1 functions as a repressor of gonadotropin hormone synthesis, but how FOXO1 is regulated in pituitary gonadotropes is unknown. The growth factors, insulin and insulin-like growth factor I (IGF1), function as key regulators of cell proliferation, metabolism and apoptosis in multiple cell types through the PI3K/AKT signaling pathway. In this study, we found that insulin and IGF1 signaling in gonadotropes induced FOXO1 phosphorylation through the PI3K/AKT pathway in immortalized and primary cells, resulting in FOXO1 relocation from the nucleus to the cytoplasm. Furthermore, insulin administration in vivo induced phosphorylation of FOXO1 and AKT in the pituitary. Thus, insulin and IGF1 act as negative regulators of FOXO1 activity and may serve to fine-tune gonadotropin expression.
journal_name
Mol Cell Endocrinoljournal_title
Molecular and cellular endocrinologyauthors
Skarra DV,Thackray VGdoi
10.1016/j.mce.2015.02.006subject
Has Abstractpub_date
2015-04-15 00:00:00pages
14-24eissn
0303-7207issn
1872-8057pii
S0303-7207(15)00082-9journal_volume
405pub_type
杂志文章abstract：:Type 4 phosphodiesterases (PDE4s) of the large PDE enzyme superfamily have unique specificity for cAMP and may, therefore, be relevant for somatotroph tumorigenesis. Somatotroph adenomas typically overexpress PDEs probably as part of a compensatory mechanism to reduce cAMP levels. The rat PDE4A5 isoform (human homolog...
journal_title：Molecular and cellular endocrinology
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journal_title：Molecular and cellular endocrinology
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doi：10.1016/0303-7207(92)90005-q
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journal_title：Molecular and cellular endocrinology
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doi：10.1016/0303-7207(96)03891-9
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journal_title：Molecular and cellular endocrinology
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journal_title：Molecular and cellular endocrinology
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journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章,评审
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pub_type： 杂志文章,评审
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journal_title：Molecular and cellular endocrinology
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journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章
doi：10.1016/s0303-7207(98)00134-8
更新日期：1998-08-25 00:00:00
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pub_type： 杂志文章
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journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章
doi：10.1016/s0303-7207(99)00092-1
更新日期：1999-07-20 00:00:00
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journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章
doi：10.1016/0303-7207(92)90195-c
更新日期：1992-01-01 00:00:00
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journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章
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journal_title：Molecular and cellular endocrinology
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journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章
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journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章
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更新日期：2014-01-25 00:00:00
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journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章
doi：10.1016/s0303-7207(03)00234-x
更新日期：2003-08-29 00:00:00
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journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章
doi：10.1016/j.mce.2016.06.014
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journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章,评审
doi：10.1016/j.mce.2013.09.008
更新日期：2014-01-25 00:00:00
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journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章
doi：10.1016/s0303-7207(00)00275-6
更新日期：2000-08-30 00:00:00
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journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章
doi：10.1016/j.mce.2017.02.003
更新日期：2017-03-15 00:00:00
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journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章
doi：10.1016/j.mce.2017.01.051
更新日期：2017-03-15 00:00:00
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journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章
doi：10.1016/0303-7207(95)03592-u
更新日期：1995-08-11 00:00:00
abstract：:The aim of our study was to investigate the direct effects of atypical antipsychotics on muscle cell functions in order to ascertain the diabetic liability of these drugs. We investigated the effects of olanzapine, clozapine and alpha-methyl-5-hydroxytryptamine on basal glucose uptake and glucose uptake in response to...
journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章
doi：10.1016/j.mce.2008.04.010
更新日期：2008-09-24 00:00:00
abstract：:Regulation of the ovalbumin (Ov) gene is strictly controlled by precise developmental, tissue-specific, and hormonal cues. The Ov gene is transcriptionally activated by four classes of steroid hormones: estrogens, androgens, glucocorticoids, and progestins. Although it has served as a model to study multi-hormone gene...
journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章
doi：10.1016/s0303-7207(02)00088-6
更新日期：2002-06-28 00:00:00
