A total of 348 unrelated Japanese subjects (220 with NIDDM, 53 with impaired glucose tolerance (IGT) and 75 normal subjects) were screened for the presence of the Gly40-Ser mutation.
Absence of association between the Gly40-->Ser mutation in the human glucagon receptor and Japanese patients with non-insulin-dependent diabetes mellitus or impaired glucose tolerance.
Taken together, the data do not support the suggested involvement of the Gly40Ser polymorphism in impaired glucose tolerance and the hypothesis of an association between NIDDM and the glucagon receptor gene in this population.