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Osteogenesis imperfecta is a group of genetic disorders, all of which cause bone fragility. OI has high genetic heterogeneity , that is, many different genetic mutations lead to the same or similar sets of observable symptoms ( phenotypes ).
The most important risk factors for osteoporosis are advanced age (in both men and women) and female sex; estrogen deficiency following menopause or surgical removal of the ovaries is correlated with a rapid reduction in bone mineral density, while in men, a decrease in testosterone levels has a comparable (but less pronounced) effect.
1277 12842 Ensembl ENSG00000108821 ENSMUSG00000001506 UniProt P02452 P11087 RefSeq (mRNA) NM_000088 NM_007742 RefSeq (protein) NP_000079 NP_031768 Location (UCSC) Chr 17: 50.18 – 50.2 Mb Chr 11: 94.83 – 94.84 Mb PubMed search Wikidata View/Edit Human View/Edit Mouse Collagen, type I, alpha 1, also known as alpha-1 type I collagen, is a protein that in humans is encoded by the COL1A1 gene ...
In classic non-deforming osteogenesis imperfecta with blue sclerae or common variable osteogenesis imperfecta with normal sclerae, nearly 60% of cases are de novo. COL1A1/2-related osteogenesis imperfecta is identified by repeated fractures with trivial trauma, defective dentinogenesis imperfecta (DI), and hearing loss.
Gaelynn Lea was born with osteogenesis imperfecta, a genetic condition that causes complications in the development of bones and limbs.Lea became impassioned by classical music from an early age, and in fourth grade a teacher took notice and encouraged Lea to pursue music after she had the class's only perfect score on a music listening test. [1]
When Stephenson was born, doctors quickly recognized the signs of the genetic mutation osteogenesis imperfecta, commonly known as "brittle bone disease". Most of his bones had been broken during the delivery. He was placed in intensive care at Chicago Children's Hospital, and doctors warned his parents that he might die very soon. [1]
The genetics of Bruck syndrome differs from osteogenesis imperfecta. Osteogenesis imperfecta usually involves autosomal dominant mutations to COL1A1 or COL1A2 which encode type 1 procollagen. [ 6 ] Bruck syndrome is linked to mutations in two genes, and therefore is divided in two types.
The Brittle Bone Society was established in 1968 in Dundee by Margaret Grant, who has OI. When she was young, Grant was aware that there was virtually no support for people with OI and that many medical professionals knew little or nothing about the condition.