Abstract
Tumor necrosis factor (TNF) is first identified as a mediator of lethal endotoxin poisoning. The anti-TNF therapy in the treatment of rheumatoid arthritis is based on the recognition of the role of TNF as the master regulator. Type II diabetes is characterized with altered stem cells and reduced vasculogenesis. Therefore, we aimed to determine if TNF inhibitor would improve vasculogenesis in ischemic hind-limbs of diabetic mice. Fifty male type 2 diabetic and their control (8–10 weeks old mice) were used, and ischemia was induced in the hind-limbs of all mice for 28 days. Vessel density was assessed by high-definition microangiography at the end of the treatment period. After 4 weeks, vessel density displayed no difference between the ischemic and the non-ischemic legs in control mice. However, in diabetic mice, the ischemic hind-limb vessel density was significantly decreased. Interestingly, diabetic mice displayed a significant improved vasculogenesis when treated with TNF inhibitor. Moreover, this data was confirmed by capillary density determined by immunostaining. TNF inhibitors are able to improve the formation of microvessels in response to ischemia in type 2 diabetes.
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Acknowledgments
The authors appreciate the helpful scientific revision from Prof. Dr. M.F. Ramadan (Institute of Scientific Research and Revival of Islamic Heritage, Umm Al-Qura University, Makkah, KSA)
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The authors would like to thank the Institute of Scientific Research and Revival of Islamic Heritage at Umm Al-Qura University (Project ID 43309046) for the financial support.
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Assiri, A.M.A., El-Baz, H.A. & Amin, A.H. Tumor necrosis factor inhibition increases the revascularization of ischemic hind-limbs in diabetic mice. Naunyn-Schmiedeberg's Arch Pharmacol 388, 1053–1060 (2015). https://doi.org/10.1007/s00210-015-1138-x
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DOI: https://doi.org/10.1007/s00210-015-1138-x