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Several lines of evidence suggest a strong genetic component to NIDDM. To clarify the role of glucokinase gene in the development of NIDDM, restriction fragment length polymorphism (RFLP) of glucokinase gene and 3' microsatellite polymorphism analyses by polymerase chain reaction-single strand conformational polymorphism (PCR-SSCP) were performed in NIDDM and control subjects. Compared to NIDDM with 1.3 kb allele/Pvu I digestion of glucokinase, 10% of NIDDM did not demonstrate 1.3 kb allele and these patients were characterized by increased insulin secretion. In 3' microsatellite polymorphism analysis, autoradiography of PCR products revealed three different alleles, including Z, Z + 2 and Z + 4. Z was the most common allele in both NIDDM and nondiabetic controls. There was no significant allele associated with NIDDM. Frequency of the homozygote Z/Z genotype was significantly lower in NIDDM subjects (16.7%) compared to normal control (46.7%)(p < 0.05). There was no difference in clinical findings according to 3' microsatellite genotypes in NIDDM. These data suggest that there does not appear to be a significant glucokinase allele associated with NIDDM but Z/Z genotype may play a suppressive role in the pathogenesis of a certain type of NIDDM in Korea. Further studies may be required to identify the molecular basis of this association.
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October 1995,
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April 1992,
Nature,
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Diabetologia,
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The New England journal of medicine,
D Y Kim, and
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Journees annuelles de diabetologie de l'Hotel-Dieu,
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Diabetologia,
