Synergistic targeting with bone marrow-derived cells and PDGF improves diabetic vascular function

Area of Science:

• Cardiovascular Biology
• Diabetes Research
• Regenerative Medicine

Background:

• Diabetes mellitus significantly increases vascular disease risk, affecting endothelial progenitor cells (EPCs) and vascular function.
• Diabetic complications include impaired vascularization, necessitating investigation into underlying mechanisms.

Purpose of the Study:

• To determine the contribution of systemic bone marrow cells and local vascular compartments to impaired cardiac vascularization in diabetes.
• To explore therapeutic strategies for reversing diabetic impairment in cardiac angiogenesis.

Main Methods:

• Utilized a mouse cardiac allograft model with streptozotocin-induced diabetes.
• Transplanted bone marrow cells from diabetic and control mice into recipient mice.
• Administered platelet-derived growth factor (PDGF)-AB to assess local vascular pathway contributions.

Main Results:

• Diabetic mice showed delayed vascularization of transplanted cardiac tissue.
• Bone marrow cells from diabetic mice failed to integrate into allografts.
• PDGF-AB treatment worsened allograft function in diabetic mice, but improved it when combined with wild-type bone marrow transplantation.

Conclusions:

• Diabetic impairment of cardiac angiogenesis involves both systemic bone marrow-derived cell dysfunction and local vascular pathway alterations.
• Therapeutic strategies targeting the interplay between local trophic factors and systemic cell function can restore diabetic cardiac angiogenesis.