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Articles by G. Ning
Total Records ( 2 ) for G. Ning
  Hong J. , Gui M.-H. , Gu W.-Q. , Zhang Y.-F. , Xu M. , Chi Z.-N. , Zhang Y. , Li X.-Y. , Wang W.-Q. and G. Ning
  Aims  To investigate changes in insulin action and insulin secretion in obese subjects with different categories of impaired glucose regulation (IGR): impaired glucose tolerance (IGT), impaired fasting glucose (IFG), and combined IFG/IGT (CGI).

Methods  A total of 222 subjects underwent an oral glucose tolerance test and a frequently sampled intravenous glucose tolerance test (FSIGTT); 100 had normal glucose tolerance (subdivided into 32 lean NGT, 68 obese NGT), and 122 were obese with IGR (82 IGT, 14 IFG and 26 CGI). The insulin sensitivity index (SI) was assessed by Bergman's minimal model method with FSIGTT; insulin secretion was determined by acute insulin response to glucose (AIRg). The disposition index (DI), the product of AIRg and SI, was used to determine whether AIRg was adequate to compensate for insulin resistance.

Results  SI was similar in NGT and IGR obese subgroups. AIRg was significantly increased in obese NGT as compared with lean NGT, significantly reduced in IGT, and further reduced in IFG and CGI subjects as compared with obese NGT subgroups. DI was reduced in NGT obese individuals. Within the obese IGR subgroups, IFG and CGI subjects had even lower DI value than IGT subjects.

Conclusions  Obese Chinese subjects with IGR have a similar degree of insulin resistance but differ in insulin secretion. Subjects with IFG and CGI have a more prominent deficiency in insulin secretion than subjects with IGT.

  W. Gu , Y. Huang , Y. Zhang , J. Hong , Y. Liu , W. Zhan , G. Ning and W. Wang


To compare the carotid intima-media thickness in patients with newly diagnosed Type 1 or Type 2 diabetes ranging from 14 to 30 years of age.


Demographic, anthropometric and laboratory data were obtained from 404 adolescents and young adults (103 subjects with Type 1 diabetes, 94 with Type 2 diabetes, 153 obese subjects and 54 normal control subjects). Carotid intima-media thickness was assessed based on Doppler ultrasound examination and compared among the four groups.


Our data showed significant increases in carotid intima-media thickness in subjects with Type 1 diabetes, Type 2 diabetes and obese subjects compared with the control subjects, with those in the group with Type 2 diabetes demonstrating the greatest change (P < 0.001). Age, BMI, percentage of fat, waist-hip ratio and total triglycerides were significantly correlated with both common and internal carotid intima-media thickness segments. From a stepwise multiple linear regression model, the independent determinants of common carotid intima-media thickness were age, BMI, HbA1c and HDL cholesterol (adjusted R2 = 0.152, P < 0.001). After adjustment for age, sex and HbA1c, the odds ratio for increased carotid intima-media thickness was 1.67 (95% CI 1.19-2.33, P = 0.003) for obese subjects, 2.38 (95% CI 1.59-9.47, P = 0.001) for subjects with Type 1 diabetes and 3.93 (95% CI 1.90-6.07, P = 0001) for subjects with Type 2 diabetes compared with the control subjects.


Compared with young control subjects, we found significant increases in carotid intima-media thickness in patients with newly diagnosed Type 1 diabetes and Type 2 diabetes, with patients with Type 2 diabetes showing greater carotid intima-media thickness. Traditional cardiovascular risk factors, such as obesity, dyslipidaemia, hypertension and hyperglycaemia, could cause vessel changes even in adolescents and young adults.

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