NDLI: Neutrophil extracted lipocortin inhibits corticotropin secretion in the AtT-20 D16:16 clonal mouse pituitary cell line: Lipocortin inhibition of ACTH release in vitro

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Neutrophil extracted lipocortin inhibits corticotropin secretion in the AtT-20 D16:16 clonal mouse pituitary cell line: Lipocortin inhibition of ACTH release in vitro

Content Provider	Semantic Scholar
Author	Pompeo, Arsenio Luini, Alberto Hirata, Fusao Baldassarre, Massimiliano Buccione, Roberto
Copyright Year	1997
Abstract	The mechanism of short-term glucocorticoid (GC) inhibition of the hypothalamic-pituitary-adrenal axis is not well understood. The direct anti-inflammatory activities of lipocortins (LCs) have suggested a role for them as extra- and intracellular mediators of the biological effects of GCs. It has been reported that recombinant human (rh) LC1 inhibits corticotropin (ACTH) release from pituitary tissue in vitro but not from AtT-20 D16:16 corticotrophs. Using the same cell line we have tested whether other exogenous rhLCs or native LC extracted from polymorphonucleate neutrophils (neLC), likely LC1, have an effect on ACTH secretion. It is shown that: (1) basal release was not affected by a short-term incubation with neLC; (2) secretion induced by corticotropin-releasing factor (CRF) and other secretagogues (phorbol ester, potassium ion or calcium ionophore) was inhibited by neLC; (3) GC inhibition of CRF-stimulated release was reverted by a monoclonal anti-neLC antibody; (4) rhLC2, rhLC5 and the fragment 212-234 of rhLC5 were without effect. Thus, only neLC is effective on AtT-20 D16:16 cells, suggesting for this annexin a role in the early phase GC inhibition of ACTH secretion.
Starting Page	169
Ending Page	177
Page Count	9
File Format	PDF HTM / HTML
DOI	10.1016/S0167-0115(97)01057-4
PubMed reference number	9652977
Journal	Medline
Volume Number	72
Alternate Webpage(s)	https://api.elsevier.com/content/article/pii/S0167011597010574
Alternate Webpage(s)	https://www.sciencedirect.com/science/article/pii/S0167011597010574?dgcid=api_sd_search-api-endpoint
Alternate Webpage(s)	https://doi.org/10.1016/S0167-0115%2897%2901057-4
Journal	Regulatory Peptides
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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