Mutations in NOTCH2 in Families with Hajdu-Cheney Syndrome

作者：Majewski Jacek; Schwartzentruber Jeremy A; Caqueret Aurore; Patry Lysanne; Marcadier Janet; Fryns Jean Pierre; Boycott Kym M; Ste Marie Louis Georges; McKiernan Fergus E; Marik Ivo; Van Esch Hilde; Michaud Jacques L; Samuels Mark E^*

来源：Human Mutation, 2011, 32(10): 1114-1117.

DOI：10.1002/humu.21546

• Hajdu-Cheney Syndrome
• NOTCH2
• osteoporosis
• acro-osteolysis

Hajdu-Cheney syndrome (HCS) is a rare genetic disorder whose hallmark is acro-osteolysis, shortening of terminal phalanges, and generalized osteoporosis. We assembled a cohort of seven families with the condition and performed whole exome resequencing on a selected set of affected patients. One protein-coding gene, NOTCH2, carried heterozygous truncating variants in all patients and their affected family members. Our results replicate recently published studies of HCS and further support this as the causal gene for the disorder. In total, we identified five novel and one previously reported mutation, all clustered near the carboxyl terminus of the gene, suggesting an allele specific genotype-phenotype effect since other mutations in NOTCH2 have been reported to cause a form of Alagille syndrome. Notch-mediated signaling is known to play a role in bone metabolism. Our results support a potential therapeutic role for Notch pathways in treatment of osteoporosis. HumMutat 32:1114-1117, 2011.

• 出版日期2011-10