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Osteogenesis imperfecta, type II: Many different types of mutations in the COL1A1 gene can cause osteogenesis imperfecta type II. These mutations range from missing pieces of the COL1A1 gene to amino acid substitutions, in which the amino acid glycine is replaced by another amino acid in the protein strand. Sometimes one end of the gene (called ...
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 ).
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. Bruck syndrome type 1 is caused by a homozygous mutation in the FKBP10 gene. Type 2 is caused by a homozygous mutation in the ...
Mutations in this gene are associated with osteogenesis imperfecta, Cardiac-valvular, and Arthrochlasia type Ehlers-Danlos syndrome, idiopathic osteoporosis, and atypical Marfan syndrome. Symptoms associated with mutations in this gene, however, tend to be less severe than mutations in the gene for alpha-1 type I collagen , since alpha-2 is ...
Osteogenesis Imperfecta (types 1–4): Mutations in COL1alpha 1 and/or COL1alpha2 are known to cause several different types of Osteogenesis Imperfecta with the severity of said diseases being related to the type and frequency of the mutations occurring. [9] For further information on COL1's effect in this disease, see Collagen, type 1, alpha 1.
COL1A1/2-related osteogenesis imperfecta is inherited in an autosomal dominant manner. The proportion of cases caused by a De novo COL1A1 or COL1A2 mutations are the cause of osteogenesis imperfecta in the vast majority of perinatally lethal osteogenesis imperfecta, and progressively deforming osteogenesis imperfecta.
Recessive forms of Osteogenesis Imperfecta are partly caused by a mutation in the LEPRE1 gene. The mutation in the gene encodes prolyl 3-hydroxylase 1. The malfunctioning prolyl 3-hydroxylase in leprecan leads to inappropriate collagen folding. This is due to the instability caused by the absence of hydroxyproline. Hydroxyproline is the product ...
Osteogenesis imperfecta [ edit ] The most direct example of the role of Sp7 in human disease has been in recessive osteogenesis imperfecta (OI), which is a type-I collagen related disease that causes a heterogeneous set of bone-related symptoms which can range from mild to very severe.