Old bone marrow cells inhibit skin wound vascularization.

Area of Science:

• Regenerative Medicine
• Vascular Biology
• Aging Research

Background:

• Hematopoietic stem cell-enriched cells, specifically lin- cells, promote vascularization in injury models.
• Lin- cells from obese diabetic mice inhibit vascular growth in diabetic wounds, unlike those from non-diabetic mice.
• Similarities between aging and diabetes, coupled with ongoing clinical trials of autologous bone marrow cells in elderly patients, necessitate investigation into aged cell efficacy.

Purpose of the Study:

• To investigate the impact of aged lin- bone marrow cells on skin wound vascularization.
• To assess the efficacy of old lin- cells in both non-diabetic and obese diabetic mouse models.

Main Methods:

• Utilized aged lin- bone marrow cells for local injection into skin wounds.
• Evaluated vascularization parameters, including vessel size, numerical density, and vascular volume density.
• Compared outcomes in non-diabetic and obese diabetic mouse models.

Main Results:

• Treatment with old lin- bone marrow cells significantly decreased vessel size and numerical density.
• A profound reduction in vascular volume density was observed in wounds of both non-diabetic and diabetic mice.
• Aged bone marrow cells impaired vascularization, irrespective of the host's diabetic status.

Conclusions:

• Old bone marrow-derived cells, including lin- cells, negatively affect wound vascularization.
• These cells may be unsuitable for therapeutic applications in elderly patients due to impaired angiogenic potential.
• Autologous bone marrow cell therapy in older individuals could potentially be detrimental.