title: Embryonic expression of type XIX collagen is transient and confined to muscle cells.
abstract: Type XIX collagen is a poorly characterized extracellular matrix component thought to be involved in the formation of specialized basement membrane zones. Here we examined the developmental expression of the mouse gene (Col19a1) by in situ hybridization. Col19a1 expression during embryogenesis commences at approximately E9.5 in the myotome and with a pattern that closely follows the myogenic regulatory factor myf-5. Like myf-5, Col19a1 transcription gradually decreases in differentiating skeletal muscle progenitors and concomitantly to increased myogenin gene expression. Transient expression of Col19a1 in muscular tissues is confined to a few sites of the developing embryo, such as limbs, tongue, and the smooth muscle layers of the stomach and esophagus. Additional non-muscular sites of Col19a1 activity include the skin of the E16.5 embryos and the cerebral cortex and hippocampus of the new born brain. Unlike all other tissues, expression of Col19a1 in the central nervous system gradually increases after birth.
authors.affiliation: Brookdale Center in the Department of Biochemistry and Molecular Biology, Mount Sinai School of Medicine-New York University, One Gustave L. Levy Place, New York, NY 10029, USA.
authors.forename: H
authors.initials: H
authors.lastname: Sumiyoshi
authors.forename: F
authors.initials: F
authors.lastname: Laub
authors.forename: H
authors.initials: H
authors.lastname: Yoshioka
authors.forename: F
authors.initials: F
authors.lastname: Ramirez
mesh_terms: D000818:Animals; D000831:Animals, Newborn; D001921:Brain / Q000166:cytology / Q000196:embryology; D002454:Cell Differentiation; D003094:Collagen / Q000032:analysis / Q000235:genetics*; D004268:DNA-Binding Proteins; D005314:Embryonic and Fetal Development; D024021:Fibril-Associated Collagens; D018507:Gene Expression Regulation, Developmental; D017403:In Situ Hybridization; D051379:Mice; D009124:Muscle Proteins / Q000235:genetics; D018482:Muscle, Skeletal / Q000196:embryology*; D009130:Muscle, Smooth / Q000196:embryology; D051787:Myogenic Regulatory Factor 5; D018008:Myogenin / Q000235:genetics; D009928:Organ Specificity; D015534:Trans-Activators; D014157:Transcription Factors / Q000235:genetics; D014158:Transcription, Genetic
chemical_list: D004268:DNA-Binding Proteins; D024021:Fibril-Associated Collagens; D009124:Muscle Proteins; C497418:Myf5 protein, mouse; C503801:Myog protein, mouse; D051787:Myogenic Regulatory Factor 5; D018008:Myogenin; D015534:Trans-Activators; D014157:Transcription Factors; C425332:col19a1 protein, mouse; D003094:Collagen