Transcriptional induction of slit diaphragm genes by Lmx1b is required in podocyte differentiation.
Transcriptional induction of slit diaphragm genes by Lmx1b is required in podocyte differentiation.
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Lmx1b 诱导裂隙基因转录是足细胞分化所必需的。
DOI:
10.1172/jci13954
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发表时间:
2002
期刊:
影响因子:
--
通讯作者:
Lee,Brendan
中科院分区:
文献类型:
--
作者:
Miner,JeffreyH;Morello,Roy;Andrews,KayaL;Li,Cong;Antignac,Corinne;Shaw,AndreyS;Lee,Brendan
LMX1Bencodes a LIM-homeodomain transcription factor. Mutations inLMX1Bcause nail-patella syndrome (NPS), an autosomal dominant disease with skeletal abnormalities, nail hypoplasia, and nephropathy. Expression of glomerular basement membrane (GBM) collagens is reduced inLmx1b–/–mice, suggesting one basis for NPS nephropathy. Here, we show thatLmx1b–/–podocytes have reduced numbers of foot processes, are dysplastic, and lack typical slit diaphragms, indicating an arrest in development. Using antibodies to podocyte proteins important for podocyte function, we found thatLmx1b–/–podocytes express near-normal levels of nephrin, synaptopodin, ZO-1, α3 integrin, and GBM laminins. However, mRNA and protein levels for CD2AP and podocin were greatly reduced, suggesting a cooperative role for these molecules in foot process and slit diaphragm formation. We identified several LMX1B binding sites in the putative regulatory regions of bothCD2APandNPHS2(podocin) and demonstrated that LMX1B binds to these sequences in vitro and can activate transcription through them in cotransfection assays. Thus,LMX1Bregulates the expression of multiple podocyte genes critical for podocyte differentiation and function. Our results indicate that reduced levels of proteins associated with foot processes and the glomerular slit diaphragm likely contribute, along with reduced levels of GBM collagens, to the nephropathy associated with NPS.
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DOI:
10.1242/dev.122.11.3537
发表时间:
1996
期刊:
Development (Cambridge, England)
影响因子:
--
作者:
Kreidberg,JA;Donovan,MJ;Goldstein,SL;Rennke,H;Shepherd,K;Jones,RC;Jaenisch,R
通讯作者:
Jaenisch,R
DOI:
--
发表时间:
1999-11
期刊:
Journal of the American Society of Nephrology : JASN
影响因子:
--
作者:
K. Tryggvason
通讯作者:
K. Tryggvason
影响因子:
4
作者:
DiPersio,CM;Shah,S;Hynes,RO
通讯作者:
Hynes,RO
影响因子:
10.5
作者:
Cosgrove, D;Meehan, DT;Samuelson, GC
通讯作者:
Samuelson, GC
影响因子:
0.7
作者:
K. Tryggvason;Vesa Ruotsalainen;J. Wartiovaara
通讯作者:
J. Wartiovaara