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- W2012065640 abstract "Suppressor of Cytokine Signaling-2 (SOCS2) is a negative regulator of growth hormone (GH) signaling and bone growth via inhibition of the Janus kinase/signal transducers and activators of transcription (JAK/STAT) pathway. This has been classically demonstrated by the overgrowth phenotype of SOCS2(-/-) mice, which has normal systemic insulin-like growth factor 1 (IGF-1) levels. The local effects of GH on bone growth are equivocal, and therefore this study aimed to understand better the SOCS2 signaling mechanisms mediating the local actions of GH on epiphyseal chondrocytes and bone growth. SOCS2, in contrast to SOCS1 and SOCS3 expression, was increased in cultured chondrocytes after GH challenge. Gain- and loss-of-function studies indicated that GH-stimulated chondrocyte STATs-1, -3, and -5 phosphorylation was increased in SOCS2(-/-) chondrocytes but not in cells overexpressing SOCS2. This increased chondrocyte STAT signaling in the absence of SOCS2 is likely to explain the observed GH stimulation of longitudinal growth of cultured SOCS2(-/-) embryonic metatarsals and the proliferation of chondrocytes within. Consistent with this metatarsal data, bone growth rates, growth plate widths, and chondrocyte proliferation were all increased in SOCS2(-/-) 6-week-old mice as was the number of phosphorylated STAT-5-positive hypertrophic chondrocytes. The SOCS2(-/-) mouse represents a valid model for studying the local effects of GH on bone growth." @default.
- W2012065640 created "2016-06-24" @default.
- W2012065640 creator A5009271948 @default.
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- W2012065640 creator A5019731927 @default.
- W2012065640 creator A5049108308 @default.
- W2012065640 creator A5078164354 @default.
- W2012065640 date "2012-04-18" @default.
- W2012065640 modified "2023-10-07" @default.
- W2012065640 title "SOCS2 is the critical regulator of GH action in murine growth plate chondrogenesis" @default.
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- W2012065640 doi "https://doi.org/10.1002/jbmr.1544" @default.
- W2012065640 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/22228213" @default.
- W2012065640 hasPublicationYear "2012" @default.
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