The average serum levels of AST and ALT, indicators of hepatic injury, in the HED group (202.3 ± 30.1 and 51.5 ± 15.4 U/L, respectively) were significantly higher than those of the ND group (142.5 ± 23.5 and 43.6 ± 17.1 U/L, respectively; p < 0.05). The gene discussed is GPT; the disease is hypohidrotic ectodermal dysplasia.