Abstract:
:Chloride channels in the ocular ciliary epithelium are believed to play a key role in aqueous humor formation. We isolated a cDNA clone from a lambda Uni-ZAP cDNA library of human nonpigmented ciliary epithelial (NPE) cells encoding the swelling-induced chloride channel/channel regulator pICln. The human clone contains an open reading frame of 237 amino acids (M(r) 26,293). The deduced human amino-acid sequence shows 90.2% and 92.7% identity with counterparts isolated from rat kidney and the canine kidney epithelial cell line MDCK. Human NPE cell lines exhibited significant levels of pICln transcripts. Complementary perforated-patch, whole-cell patch clamping demonstrated that swelling activates Cl- channels of the NPE cells, as suggested by ruptured-patch measurements. The results document the molecular isolation and identification of a human cDNA clone of a Cl- conductance regulator from ocular cells displaying volume-activated Cl-channels.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Anguita J,Chalfant ML,Civan MM,Coca-Prados Mdoi
10.1006/bbrc.1995.1309subject
Has Abstractpub_date
1995-03-08 00:00:00pages
89-95issue
1eissn
0006-291Xissn
1090-2104pii
S0006291X85713095journal_volume
208pub_type
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