title: Identification of developmentally regulated mesodermal-specific transcript in mouse embryonic metanephros.
abstract: Mesodermal-specific cDNA or transcript (MEST) was identified by suppression subtractive hybridization-PCR of cDNA isolated from embryonic day 13 vs. newborn mice kidneys. At day 13 of mouse gestation, a high expression of MEST, with a single approximately 2.7-kb transcript that was exclusively localized to the metanephric mesenchyme was observed. The MEST mRNA expression gradually decreased during the later stages and then abruptly decreased in the newborn kidneys and subsequent postnatal life, after which a very mild expression persisted in the glomerular mesangium. Regression in mRNA expression during embryonic renal development appears to be related to methylation of the MEST gene. Treatment of metanephroi, harvested at day 13 of gestation with MEST-specific antisense oligodeoxynucleotide resulted in a dose-dependent decrease in the size of the explants and the nephron population. This was associated with a selective decrease in MEST mRNA expression and accelerated apoptosis of the mesenchyme. These findings suggest that MEST, a gene with a putative mesenchymal cell-derived protein, conceivably plays a role in mammalian metanephric development.
authors.affiliation: Department of Pathology, Northwestern University Medical School, Chicago, Illinois 60611, USA. y-kanwar@northwestern.edu
authors.forename: Yashpal S
authors.initials: YS
authors.lastname: Kanwar
authors.forename: Anil
authors.initials: A
authors.lastname: Kumar
authors.forename: Kosuke
authors.initials: K
authors.lastname: Ota
authors.forename: Sun
authors.initials: S
authors.lastname: Lin
authors.forename: Jun
authors.initials: J
authors.lastname: Wada
authors.forename: Sumant
authors.initials: S
authors.lastname: Chugh
authors.forename: Elisabeth I
authors.initials: EI
authors.lastname: Wallner
mesh_terms: D000818:Animals; D000831:Animals, Newborn / Q000378:metabolism; D017209:Apoptosis; D019175:DNA Methylation; D018076:DNA, Complementary / Q000235:genetics / Q000302:isolation & purification; D005260:Female; D018507:Gene Expression Regulation, Developmental; D005865:Gestational Age; D017403:In Situ Hybridization; D020287:In Situ Nick-End Labeling; D007668:Kidney / Q000196:embryology* / Q000254:growth & development / Q000378:metabolism; D008297:Male; D008648:Mesoderm / Q000737:chemistry*; D051379:Mice; D008813:Mice, Inbred ICR; D009693:Nucleic Acid Hybridization; D020319:Oligodeoxyribonucleotides, Antisense / Q000494:pharmacology; D016133:Polymerase Chain Reaction; D011247:Pregnancy; D011506:Proteins / Q000235:genetics*; D012333:RNA, Messenger / Q000032:analysis*; D020133:Reverse Transcriptase Polymerase Chain Reaction
chemical_list: D018076:DNA, Complementary; D020319:Oligodeoxyribonucleotides, Antisense; D011506:Proteins; D012333:RNA, Messenger; C103637:mesoderm specific transcript protein