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A therapeutic approach to treat cardiovascular dysfunction of diabetes

L K Bhatt1, A Veeranjaneyulu

  • 1Department of Pharmacology, School of Pharmacy and Technology Management, NMIMS University, Vile Parle (W), Mumbai, Maharashtra 400 056, India.

Experimental and Toxicologic Pathology : Official Journal of the Gesellschaft Fur Toxikologische Pathologie
|April 9, 2011
PubMed

Insights

This study shows that combining minocycline and aspirin effectively treats cardiovascular dysfunction in diabetes by inhibiting matrix metalloproteinase-2 (MMP-2) and matrix metalloproteinase-9 (MMP-9). This combination therapy offers a promising approach for managing diabetes-related heart complications.

Area of Science:

  • Cardiovascular Research
  • Pharmacology
  • Diabetology

Background:

  • Diabetes mellitus significantly elevates the risk of cardiovascular dysfunction.
  • Matrix metalloproteinases, specifically matrix metalloproteinase-2 (MMP-2) and matrix metalloproteinase-9 (MMP-9), play a role in extracellular matrix remodeling and are implicated in cardiovascular complications.
  • Minocycline and aspirin are known to modulate MMP activity and inflammatory pathways.

Purpose of the Study:

  • To investigate the potential synergistic effect of minocycline and aspirin in ameliorating streptozotocin-induced cardiovascular dysfunction in diabetic rats.
  • To determine if the combination therapy enhances the inhibition of MMP-2 and MMP-9, thereby mitigating diabetes-related cardiovascular changes.
  • To evaluate the impact of this combined treatment on arterial pressure, cardiac contractility, and vascular reactivity.

Main Methods:

  • Diabetes was induced in rats using streptozotocin (55 mg/kg).
  • Following four weeks, rats were treated for four weeks with minocycline (50 mg/kg), aspirin (50 mg/kg), or a combination of both.
  • Cardiovascular parameters (arterial pressure, heart rate, left ventricular pressure), aortic ring responses to phenylephrine and acetylcholine, and MMP-2/MMP-9 levels via gel zymography were assessed.

Main Results:

  • Diabetic rats exhibited significantly decreased heart rate, mean arterial pressure, and cardiac contractility (dp/dt max/min).
  • The combination of minocycline and aspirin significantly improved these cardiovascular parameters compared to vehicle-treated diabetic rats.
  • Endothelium-dependent relaxation was impaired in diabetic rats but significantly restored by the combination therapy.
  • Levels of collagen, MMP-2, and MMP-9 were significantly reduced in the group treated with both minocycline and aspirin.

Conclusions:

  • Aspirin potentiates minocycline-induced inhibition of MMP-2 and MMP-9.
  • The combination of minocycline and aspirin effectively ameliorates cardiovascular dysfunction associated with diabetes.
  • This combined therapeutic strategy presents a potential new approach for treating diabetes-related cardiovascular complications.

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