Expression patterns of connexin 29 (GJE1) in mouse and rat cochlea.

Abstract:

:Multiple types of connexin (Cxs) products, including Cx26, Cx30, Cx31, and Cx43, are found by immunolabeling in the mature cochlea. The transcript of Cx29, a newly discovered member of Cx gene family, was also discovered in the cochlea by cDNA macroarray hybridization. However, the functional roles of Cx29 in the cochlea remain unclear. To elucidate whether the Cx29 gap junction protein epsilon 1, GJE1, is localized in the adult mouse and rat cochlea, we performed an immunohistochemistry (IHC) and reverse transcription-polymerase chain reaction (RT-PCR) analysis. GJE1 was detected in the cochlea neurons, spiral limbus, spiral ligament, organ of Corti, and stria vascularis using IHC analysis. We also show that Cx29 mRNA is present in spiral limbus, spiral ligament, organ of Corti, stria vascularis, and lateral wall by the method of RT-PCR. Higher levels of Cx29 mRNA were found in spiral ligament and spiral limbus, whereas lower level in lateral wall. Our data first provide a comprehensive and detailed pattern of Cx29 gene expression in the mouse and rat cochlea. Knowledge of spatial distribution of Cx29 also allows the identification of candidate genes for deafness and provides important insight into mechanisms that lead to deafness due to mutations in Cx29 gene.

authors

Yang JJ,Liao PJ,Su CC,Li SY

doi

10.1016/j.bbrc.2005.09.193

subject

Has Abstract

pub_date

2005-12-16 00:00:00

pages

723-8

issue

2

eissn

0006-291X

issn

1090-2104

pii

S0006-291X(05)02223-0

journal_volume

338

pub_type

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