Alternatively Spliced Nephrin in Experimental Glomerular Disease of the Rat
作者:
PAULIINA LUIMULA,
PETRI AALTONEN,
HEIKKI AHOLA,
TUULA PALMEN, AND,
HARRY HOLTHÖFER,
期刊:
Pediatric Research
(OVID Available online 2000)
卷期:
Volume 48,
issue 6
页码: 759-762
ISSN:0031-3998
年代: 2000
出版商: OVID
数据来源: OVID
摘要:
Nephrin is a novel transmembrane protein of kidney glomerular podocytes, which appears crucially important for the maintenance of the glomerular filtration barrier. According to its predicted structure, nephrin has additional roles in cell-cell adhesion and/or signal transduction. We have previously cloned the rat homologue of nephrin and described its alternatively spliced transcripts alpha and beta. In this study we examined the alterations in expression and regulation of particularly the major alternatively spliced nephrin-alpha giving rise to a variant lacking the membrane spanning domain in the puromycin nephrosis of the rat. A down-regulation of up to 78% was observed of the full length mRNA after 10 d of PAN treatment. The expression changes of nephrin-alpha followed closely the expression of the full length mRNA. Interestingly, we also found nephrin protein in urine at the peak proteinuria samples of this model. These results suggest that soluble nephrin variants may be important markers for proteinuric diseases.
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