ArticleThe journal of histochemistry and cytochemistry : official journal of the Histochemistry Society2010
Expression of IGFBP7 mRNA in corticotrophs in the anterior pituitary of adrenalectomized rats.
Article in The journal of histochemistry and cytochemistry : official journal of the Histochemistry Society, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed, 10 citations in OpenAlex.
- Expression and localization of forkhead box protein FOXJ1 in S100β-positive multiciliated cells of the rat pituitary.Medical molecular morphology · 2017Article
- Intracellular localization of α-tubulin acetyltransferase ATAT1 in rat ciliated cells.Medical molecular morphology · 2016Article
- The elongation of primary cilia via the acetylation of α-tubulin by the treatment with lithium chloride in human fibroblast KD cells.Medical molecular morphology · 2015Article
- miR-449a contributes to glucocorticoid-induced CRF-R1 downregulation in the pituitary during stress.Molecular endocrinology (Baltimore, Md.) · 2013Article
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Authors and funding
5 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The number of corticotrophs increases in the anterior pituitary (AP) gland in adrenalectomized (AdX) rats. In this study, aimed at identifying the growth factor implicated in this proliferation, we analyzed proteins secreted from a cDNA library of the AP of AdX rats, using the signal sequence trap method. A PCR analysis of several cDNAs that coded for insulin-like growth factor binding protein (IGFBP) 5, IGFBP7, and vacuolar H+-ATPase accessory subunit Ac45 revealed an increased and decreased expression level of IGFBP7 mRNA in the AP of AdX rats and AdX rats injected with dexamethasone, respectively. IGFBP7 mRNA was predominately expressed in the corticotrophs of the APs of both sham-operated and AdX rats. The AP of AdX rats contained an increased number of IGFBP7 mRNA-expressing cells and corticotrophs compared with that of sham-operated rats, but the ratio of IGFBP7 mRNA-positive corticotrophs per total number of corticotrophs did not significantly change in either group. Histochemical analysis of labeled proliferating cell nuclear antigen (PCNA) and sex-determining region Y box-2 (SOX2) revealed the presence of several PCNA-positive signals and the absence of SOX2 cells among the corticotrophs, suggesting that IGFBP7 mRNA-expressing corticotrophs are derived from in situ corticotrophs and that they increase in number as corticotrophs increase. The possible roles of IGFBP7 in the corticotrophs are also discussed.
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