Linked Life Data

16572591

Source:http://linkedlifedata.com/resource/pubmed/id/16572591

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2006-3-31
pubmed:abstractText
Podocin (NPHS2) is a component of the glomerular slit-diaphragm, with major regulatory functions in renal permeability of proteins. Loss of podocin and decrease in resynthesis may influence the outcome of proteinuric renal disease such as segmental glomerulosclerosis (FSGS), and promoter functionality plays a key role in this process. NPHS2 promoter variants with functional activity may be a part of the problem of podocin resynthesis. We sequenced NPHS2 promoter region from -628 to ATG in a large cohort of 260 nephrotic patients (161 with FSGS) who were presenting proteinuria from moderate to severe and were receiving or had received modular therapies according to their sensitivity to steroids and other immune modulators. Three sequence variants (-236C>T, -52C>G, -26C>G) were identified in our study population that gave an allele frequency below 1% (5 patients out of 520 alleles). Functional implications were shown for each variants that were most evident for -52C>G and -26C>G (-50% of luciferase expression compared to the wild-type sequence, p < 0.01). Consensus analysis for homology of the -52 region with regulatory factors revealed homology for USF1 and the sum of experiments with gel retardation and with cells silenced for USF1 confirmed that this factor regulates NPHS2 expression at this site. In conclusion, three functional variants in NPHS2 promoter have been identified in a large cohort of patients with nephrotic syndrome and FSGS that have a frequency <1%. One of these (i.e., -52C>G) is associated with a poor clinical outcome and evolution to end-stage renal failure. USF1 was identified as the transcriptional factor regulating NPHS2 at this site. Even if not sufficient to cause FSGS per se, these variants could represent modifiers for severity and/or progression of the disease.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
1052-2166
pubmed:author
pubmed:issnType
Print
pubmed:volume
13
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
59-66
pubmed:dateRevised
2008-11-21
pubmed:meshHeading
pubmed-meshheading:16572591-Adolescent, pubmed-meshheading:16572591-Adult, pubmed-meshheading:16572591-Aged, pubmed-meshheading:16572591-Child, pubmed-meshheading:16572591-Child, Preschool, pubmed-meshheading:16572591-Cohort Studies, pubmed-meshheading:16572591-Female, pubmed-meshheading:16572591-Glomerulosclerosis, Focal Segmental, pubmed-meshheading:16572591-Humans, pubmed-meshheading:16572591-Infant, pubmed-meshheading:16572591-Infant, Newborn, pubmed-meshheading:16572591-Intracellular Signaling Peptides and Proteins, pubmed-meshheading:16572591-Luciferases, pubmed-meshheading:16572591-Male, pubmed-meshheading:16572591-Membrane Proteins, pubmed-meshheading:16572591-Middle Aged, pubmed-meshheading:16572591-Mutation, pubmed-meshheading:16572591-Nephrotic Syndrome, pubmed-meshheading:16572591-Promoter Regions, Genetic, pubmed-meshheading:16572591-Proteinuria, pubmed-meshheading:16572591-Upstream Stimulatory Factors
pubmed:year
2006
pubmed:articleTitle
Rare functional variants of podocin (NPHS2) promoter in patients with nephrotic syndrome.
pubmed:affiliation
Department of Clinical Medicine, Nephrology and Health Sciences, University of Parma, Italy.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't