Growth hormone-specific induction of the nuclear localization of porcine growth hormone receptor in porcine hepatocytes.

Abstract:

:The phenomenon of nuclear translocation of growth hormone receptor (GHR) in human, rat, and fish has been reported. To date, this phenomenon has not been described in a domestic animal (such as pig). In addition, the molecular mechanisms of GHR nuclear translocation have not been thoroughly elucidated. To this end, porcine hepatocytes were isolated and used as a cell model. We observed that porcine growth hormone (pGH) can induce porcine GHR's nuclear localization in porcine hepatocytes. Subsequently, the dynamics of pGH-induced pGHR's nuclear localization were analyzed and demonstrated that pGHR's nuclear localization occurs in a time-dependent manner. Next, we explored the mechanism of pGHR nuclear localization using different pGHR ligands, and we demonstrated that pGHR's nuclear translocation is GH(s)-dependent. We also observed that pGHR translocates into cell nuclei in a pGH dimerization-dependent fashion, whereas further experiments indicated that IMPα/β is involved in the nuclear translocation of the pGH-pGHR dimer. The pGH-pGHR dimer may form a pGH-GHR-JAK2 multiple complex in cell nuclei, which would suggest that similar to its function in the cell membrane, the nuclear-localized pGH-pGHR dimer might still have the ability to signal.

journal_name

Domest Anim Endocrinol

authors

Lan HN,Hong P,Li RN,Shan AS,Zheng X

doi

10.1016/j.domaniend.2017.05.003

subject

Has Abstract

pub_date

2017-10-01 00:00:00

pages

39-47

eissn

0739-7240

issn

1879-0054

pii

S0739-7240(17)30011-5

journal_volume

61

pub_type

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