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Aim of this study is to investigate effects of stem cells derived from the peripheral nerve and adipose tissues following the nerve crush injury in control and obese rats. For this aim, 41 Wistar Albino female rats were separated into eight equal groups; non-obese control (NOC) obese control (OC), non-obese injury (NOH), obese injury (OH), non-obese adipose (NOY), obese adipose (OY), non-obese nerve (NOPS), obese nerve (OPS). At the end of 8 weeks, all experimental animals without control groups were subjected to nerve crush procedure and sciatic nerve or fat stem cell homogenates were injected on the treatment group rats, and then, recovery process has been observed and histopathological, stereological, electrophysiological analyses and bioinformatic evaluation were made on removed sciatic nerves. Stereological results showed that adipose homogenate gave more successful results than peripheral nerve homogenates in the NOY group in comparison to the NOPS group in terms of myelinated axon number. Peripheral nerve homogenate has shown more successful results in the OPS group in comparison to the OY group. The number of unmyelinated axons was increased following treatment with adipose tissue homogenate in NOY and OY groups. In terms of myelin sheath thickness; we detected that treatments by peripheral nerve and especially adipose tissue homogenates lead to increase in the thickness of the axons of the peripheral nerves belong to the control and obese injury groups. All results showed that mesenchymal stem cell treatment by fresh tissue homogenates is successful in peripheral nerve regeneration and fat tissue is a considerable source of the stem cells for clinical applications.

Potential Effects of Stem Cells Derived from the Peripheral Nerve and Adipose Tissue after the Nerve Crush Injury in Control and Obese Rats