Cole-Carpenter syndrome
Definition:
Cole-Carpenter syndrome (CCS) is a severe bone fragility disorder that is characterized by frequent fractures, craniosynostosis, ocular proptosis, hydrocephalus, and distinctive facial features. CCS was first described in 1987 as a newly recognized type of osteogenesis imperfecta (OI). Despite its apparent extreme rarity, CCS is commonly classified as a separate OI-like disorder. CCS is caused by a specific de novo mutation in P4HB, the gene that encodes protein disulfide isomerase (PDI), that impairs the disulfide isomerase activity. Mutations in SEC24D, a gene encoding a component of the COPII complex machinery, have been reported to cause CCS as well.
References:
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[1]. Frank Rauch, et al. Cole-Carpenter syndrome is caused by a heterozygous missense mutation in P4HB. Am J Hum Genet. 2015 Mar 5;96(3):425-31. [Content Brief]
[2]. Lutz Garbes, et al. Mutations in SEC24D, encoding a component of the COPII machinery, cause a syndromic form of osteogenesis imperfecta. Am J Hum Genet. 2015 Mar 5;96(3):432-9. [Content Brief]
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