Antioxidant therapy attenuates diabetes-related impairment of bone marrow stem cells

Area of Science:

• * Regenerative Medicine
• * Oxidative Stress Research
• * Diabetes Complications

Background:

• * Diabetes mellitus is associated with impaired angiogenesis, potentially due to increased oxidative stress.
• * Bone marrow cells in diabetic individuals exhibit reduced angiogenic capacity.
• * This study explores antioxidant therapy as a potential intervention for diabetes-related vascular dysfunction.

Purpose of the Study:

• * To investigate whether antioxidant therapy can mitigate the diabetes-induced impairment of bone marrow mononuclear cells (BM-MNCs).
• * To assess the impact of antioxidant treatment on oxidative stress markers and endothelial progenitor cell function in diabetic mice.

Main Methods:

• * Diabetic and healthy mice were treated with a superoxide dismutase mimic or a vehicle control for four weeks.
• * Bone marrow mononuclear cells (BM-MNCs) were analyzed for endothelial progenitor cell populations (Flk-1/CD34) and intracellular reactive oxygen species (ROS) levels.
• * Endothelial differentiation potential of BM-MNCs was evaluated via VE-cadherin immunostaining.

Main Results:

• * Diabetic mice exhibited lower levels of endothelial progenitor cells and higher ROS levels in BM-MNCs compared to healthy controls.
• * Antioxidant therapy significantly reduced intracellular ROS levels in BM-MNCs from diabetic mice.
• * Treatment with antioxidant therapy significantly increased the percentage of endothelial progenitor cells and their differentiation capacity.

Conclusions:

• * Antioxidant therapy effectively attenuated diabetes-related impairments in bone marrow mononuclear cells.
• * The beneficial effects of antioxidant therapy are attributed to the reduction of oxidative stress.
• * This suggests a therapeutic strategy for improving angiogenic potential in diabetes.