Objective: To determine the frequency of the transforming growth factor-alpha (TGFalpha) Taq1 polymorphism in nonsyndromic cleft lip with or without cleft palate (CL+/-P) and cleft palate only (CP) in Kelantan, Malaysia.
Setting: The study was conducted at the Combined Cleft Clinic and at the Human Genome Centre in Hospital Universiti Sains Malaysia in Kelantan, Malaysia.
Design: We examined the C2/Taq1 variant of the TGFalpha gene in 46 patients with nonsyndromic CL+/-P or CP only and in 33 controls. The TGFalpha genotype frequencies in patients were compared with those in controls using the chi-square or Fisher exact test. DNA samples were obtained from peripheral blood.
Results: No association was found between TGFalphaTaq1 polymorphism and CL+/-P or CP in this case-control study. In addition, no homozygosity for the rare allele C2 was noted in CL+/-P, CP, or the controls.
Conclusion: No evidence of TGFalphaTaq1 polymorphism was observed in association with CL+/-P and CP in this study.