- 著者
- Yanqin Lu Shie Zhang Yanzhou Wang Xiuzhi Ren Jinxiang Han
- 出版者
- International Research and Cooperation Association for Bio & Socio-Sciences Advancement
- 雑誌
- Intractable & Rare Diseases Research (ISSN:21863644)
- 巻号頁・発行日
- vol.8, no.2, pp.98-107, 2019-05-31 (Released:2019-06-14)
- 参考文献数
- 110
- 被引用文献数
- 27
Type I collagen is an important structural protein of bone, skin, tendon, ligament and other connective tissues. It is initially synthesized as a precursor form, procollagen, consisting of two identical pro-α1(I) and one proα2(I) chains, encoded by COL1A1 and COL1A2, respectively. The N- and C- terminal propeptides of procollagen are cleavage by N-proteinase and C-proteinase correspondingly, to form the central triple helix structure with Gly-X-Y repeat units. Mutations of COL1A1 and COL1A2 genes are associated with osteogenesis imperfecta, some types of Ehlers-Danlos syndrome, Caffey diseases, and osteogenesis imperfect/Ehlers-Danlos syndrome overlapping diseases. Clinical symptoms caused by different variations can be variable or similar, mild to lethal, and vice versa. We reviewed the relationship between clinical manifestations and type I collagen – related rare genetic disorders and their possible molecular mechanisms for different mutations and disorders.
- 著者
- Xianlong Shi Yanqin Lu Yanzhou Wang Yu-ang Zhang Yuanwei Teng Wanshui Han Zhenzhong Han Tianyou Li Mei Chen Junlong Liu Fengling Fang Conghui Dou Xiuzhi Ren Jinxiang Han
- 出版者
- バイオ&ソーシャル・サイエンス推進国際研究交流会
- 雑誌
- Intractable & Rare Diseases Research (ISSN:21863644)
- 巻号頁・発行日
- vol.4, no.1, pp.49-53, 2015-01-31 (Released:2015-02-05)
- 参考文献数
- 23
- 被引用文献数
- 8
Osteogenesis imperfecta (OI) is an inheritable connective tissue disorder with a broad clinical heterozygosis, which can be complicated by other connective tissue disorders like Ehlers-Danlos syndrome (EDS). OI/EDS are rarely documented. Most OI/EDS mutations are located in the N-anchor region of type I procollagen and predominated by glycine substitution. We identified a c.3521C>T (p.A1174V) heterozygous mutation in COL1A1 gene in a four-generation pedigree with proposed mild OI/EDS phenotype. The affected individuals had blue sclera and dentinogenesis imperfecta (DI) was uniformly absent. The OI phenotype varied from mild to moderate, with the absence of scoliosis and increased skin extensibility. Easy bruising, joint dislocations and high Beighton score were present in some affected individuals. EDS phenotype is either mild or unremarkable in some individuals. The mutation is poorly conserved and in silico prediction support the relatively mild phenotype. The molecular mechanisms of the mutation that leads to the possible OI/EDS phenotype should be further identified by biochemical analysis of N-propeptide processing and steady state collagen analysis.