title: Osteogenesis imperfecta (lethal) bones contain types III and V collagens.
abstract: Lethal osteogenesis imperfecta (OI-L) and normal fetal bones contain types I and V collagen with relatively more type V in OI-L bones. The latter, unlike normal fetal bone, also contain some type III collagen. Such altered collagen ratios could directly produce the bony fragility and radiotranslucency of OI-L bones. Since this is an inherited osteoporosis similar alterations in acquired osteoporoses are also possible.
mesh_terms: D003094:Collagen / Q000032:analysis*; D004591:Electrophoresis, Polyacrylamide Gel; D005269:Femur / Q000032:analysis* / Q000196:embryology; D005865:Gestational Age; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D010013:Osteogenesis Imperfecta / Q000378:metabolism*
chemical_list: D003094:Collagen