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Is myeloperoxidase a key component in the ROS-induced vascular damage related to nephropathy in type 2 diabetes?

Susana Rovira-Llopis1, Milagros Rocha, Rosa Falcon

  • 11 Fundacion para la Investigacion Sanitaria y Biomedica de la Comunidad Valenciana FISABIO, Endocrinology Service, University Hospital Doctor Peset , Valencia, Spain .

Antioxidants & Redox Signaling
|March 26, 2013
PubMed

Insights

Type 2 diabetes is linked to higher oxidative stress, indicated by increased myeloperoxidase (MPO) levels and heightened leukocyte-endothelium interactions. These factors correlate with the development of diabetic nephropathy.

Area of Science:

  • Endocrinology
  • Nephrology
  • Immunology

Background:

  • Microvascular complications in type 2 diabetes are not fully understood.
  • The roles of leukocyte-endothelium interactions and myeloperoxidase (MPO) in these complications require clarification.

Purpose of the Study:

  • To investigate the correlation between type 2 diabetes, microvascular complications, leukocyte-endothelium interactions, and MPO levels.
  • To explore the relationship between MPO, oxidative stress, and the development of nephropathy in type 2 diabetes.

Main Methods:

  • Measured serum glucose, reactive oxygen species (ROS) rate, and MPO concentration in type 2 diabetic patients.
  • Assessed leukocyte-endothelium interactions, including polymorphonuclear leukocyte (PMN) rolling velocity, flux, and adhesion.
  • Quantified levels of tumor necrosis factor alpha (TNFα) and E-selectin.

Main Results:

  • Type 2 diabetic patients exhibited elevated glucose, ROS, and MPO levels.
  • Patients with nephropathy showed significantly higher MPO levels, positively correlating with the albumin/creatinine ratio.
  • Nephropathic patients displayed increased PMN rolling, adhesion, and elevated TNFα and E-selectin, with MPO levels correlating positively with PMN rolling flux and adhesion.

Conclusions:

  • Type 2 diabetes induces oxidative stress, increasing MPO levels and leukocyte-endothelium interactions.
  • These elevated MPO levels and interactions are associated with the progression of diabetic nephropathy.

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