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Differential expression of polycytosine-binding protein isoforms in adrenal gland, locus coeruleus and midbrain.

Abstract：

:Polycytosine-binding proteins (PCBPs) are RNA-binding proteins that participate in post-transcriptional control pathways. Among the diverse functions of these proteins is the interaction with a 27 nucleotide pyrimidine-rich domain within the 3'UTR of tyrosine hydroxylase (TH) mRNA. Mutations to this domain result in decreased stability of TH mRNA and loss of cAMP-mediated activation of TH mRNA translation. PCBPs are hypothesized to play key roles in these regulatory mechanisms. In order to further test this hypothesis, we examined the tissue distribution of PCBPs in catecholaminergic cells. Initial studies demonstrated that proteins from catecholaminergic tissues bind to TH mRNA 3'UTR sequences and these proteins have an apparent Mr of ∼ 44 kDa, which is close to the molecular sizes for PCBPs. Fluorescent immunohistochemistry and confocal microscopy was used to analyze the distribution of PCBP isoforms in TH-positive cells of the rat midbrain, locus coeruleus, and adrenal gland. Our results suggest that: (1) PCBP2 is the predominant isoform in TH-positive cells of the rat midbrain; (2) PCBP3 is the predominant isoform in TH-positive cells of the locus coeruleus; and (3) PCBP1 is the predominant isoform in the adrenal medulla. The localization of PCBP proteins to TH-positive cells in these catecholaminergic tissues is consistent with the hypothesis that PCBPs play a role in the regulation of TH expression.

journal_name

Neuroscience

journal_title

Neuroscience

authors

Boschi NM,Takeuchi K,Sterling C,Tank AW

doi

10.1016/j.neuroscience.2014.11.038

subject

Has Abstract

pub_date

2015-02-12 00:00:00

pages

1-12

eissn

0306-4522

issn

1873-7544

pii

S0306-4522(14)01004-5

journal_volume

286

pub_type

杂志文章

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