Zhou Y, Liu B, Wang M, Ni J. Endothelin-1 gene polymorphisms and risk of chemoresistant pediatric osteosarcoma.
Pediatr Blood Cancer 2014;
61:612-7. [PMID:
24123836 DOI:
10.1002/pbc.24790]
[Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2013] [Accepted: 09/02/2013] [Indexed: 11/08/2022]
Abstract
BACKGROUND
Osteosarcoma (OS) is the most common childhood bone cancer. Chemoresistance is the principal reason for poor survival and disease recurrence in OS patients, and ET-1 reportedly plays an important role in the development of chemoresistance in OS cells. In the present study, we for the first time explored the association of endothelin-1 (ET-1) SNPs and haplotypes with the risk of chemoresistant pediatric OS.
PROCEDURE
We genotyped three SNPs (rs1800541, rs2070699, and rs5370) in the ET-1 gene in a case-control study, using 350 pairs of age, sex, and tumor location and stage matched pediatric patients with OS. Patients who showed <90% tumor necrosis after neochemotherapy were defined as poor responders (cases), and those who showed ≥90% tumor necrosis were defined as good responders (controls).
RESULTS
The G allele at rs1800541 and the G allele at rs2070699 were associated with reduced and increased risk of chemoresistant OS, respectively. The rs1800541-rs2070699 haplotypes TG and GT were respectively associated with increased (P = 0.012; adjusted OR, 1.82; 95% CI, 1.10-5.65) and reduced (P = 0.009; adjusted OR, 0.25; 95% CI, 0.14-0.84) risk of chemoresistant OS. The TG and the GT haplotypes have a gene-dosage effect on increasing and decreasing the ET-1 expression in primary OS tumor cells from chemoresistant pediatric OS subjects, respectively.
CONCLUSIONS
This study provides the first evidence of an association between the ET-1 gene SNPs and haplotypes and the risk of chemoresistant pediatric OS, potentially adding new insights into the pathophysiology and treatment of chemoresistant OS.
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