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Advances in Diabetes Research: New Findings from the University of Texas

Strategic Insights

— 2 min read

Researchers at the University of Texas have made significant progress in understanding various aspects of diabetes, a chronic disease that affects millions worldwide. Recent studies have shed new light on the mechanisms underlying diabetic retinopathy, microvascular dysfunction, and weight gain in type 1 diabetes mellitus.

Key Takeaways:

  • Diabetic retinopathy may be a by-product of bone morphogenetic protein-4 (BMP-4) activity, which stimulates vascular endothelial growth factor (VEGF) release from retinal pigment epithelial cells.
  • The study found that BMP-4 levels in the conditioned media of ARPE-19 cells cultured in high glucose increased significantly, and the effect of BMP-4 on VEGF release from ARPE-19 cells was dose- and time-dependent.
  • Diabetic microvascular dysfunction can lead to macroangiopathy and microangiopathy, and evidence suggests that endothelial dysfunction could be involved in the pathogenesis of these conditions.
  • Insulin therapy in type 1 diabetes mellitus may cause weight gain due to the lipogenic effect of insulin, followed by an increase in fat mass, rather than increased energy intake or appetite.
  • The study found that weight increased by 2.15 kg (2.69% of baseline) after 6 months of insulin therapy, whereas HbA1c dropped by 1.71% (16.3%) to 7.9%.
  • Glycaemic control did not correlate with weight change but tended to correlate with fat mass increase (p=0.064; r=-0.51).
  • An increase in activity levels between 3 and 6 months correlated with decreasing fat mass (p=0.037; r=-0.74).

Statistics:

  • 21 subjects with type 1 diabetes were enrolled in the study.
  • At baseline, average weight was 73.7+/-17.4 kg and HbA1c was 10.0+/-2.2%.
  • Weight increased by 2.15 kg (2.69% of baseline) after 6 months of insulin therapy.
  • The changes in appetite scores had a negative correlation with fat mass gain (p=0.035; r=-0.61).
  • The changes in lean body mass correlated with protein and total energy intake (p=0.007, r=0.85 and p=0.003, r=0.73 respectively).
  • The changes in leptin levels correlated with weight gain that can be attenuated by the increases in the activity levels.

Sources:

  • La Fontaine, J., et al. (2006). Current concepts in diabetic microvascular dysfunction. J Am Podiatr Med Assoc, 96(3), 245-252.
  • Jacob, A. N., et al. (2006). Potential causes of weight gain in type 1 diabetes mellitus. Diabetes Obes Metab, 8(4), 404-411.
  • Vogt, R. R., et al. (2006). Bone morphogenetic protein-4 enhances vascular endothelial growth factor secretion by human retinal pigment epithelial cells. J Cell Biochem, 98(5), 1196-1202.

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