AIM: To investigate the mutation of EDNRB gene and EDN3 gene in sporadic Hirschsprung's disease (HD) in Chinese population.METHODS: Genomic DNA was extracted from bowel tissues of 34 unrelated HD patients which were removed by surgery.Exon 3, 4, 6 of EDNRB gene and Exon 1, 2 of EDN-3 gene were amplified by polymerase chain reaction (PCR) and analyzed by single strand conformation polymorphism (SSCP).RESULTS: EDNRB mutations were detected in 2 of the 13short-segment HD. One mutant was in the exon 3, the other was in the exon 6. EDN-3 mutation was detected in one of the 13 short-segment HD and in the exon 2. Both EDNRB and EDN-3 mutations were detected in one short-segment HD. No mutations were detected in the ordinary or longsegment HD.CONCLUSION: The mutations of EDNRB gene and EDN-3 gene are found in the short-segment HD of sporadic Hirschsprung's disease in Chinese population, which suggests that the EDNRB gene and EDN-3 gene play important roles in the pathogenesis of HD.
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