Acta Medica Iranica 2018. 56(7):421-428.

Acute Transplantation of Human Olfactory Mucosa-Derived Olfactory Ensheathing Cells Fails to Improve Locomotor Recovery in Rats
Mina Afhami, Mansoureh Hashemi, Khashayar Afshari, Jamal Chenari, Seyed Mohammad Tavangar, Mahmoudreza Hadjighassem, Ahmad Reza Dehpour, Ahad Muhammadnejad, Arvin Haj-Mirzaian, Vafa Rahimi-Movaghar

Abstract


Olfactory ensheathing cells-based therapy for spinal cord injury (SCI) repair has been a possible treatment for clinical study because of their safety in autologous transplantation and potential regenerative capability. However, there are contradictory reports on the results after transplantation in animal models. The purpose of this research was to investigate the effect of acute transplantation of human mucosa-derived olfactory ensheathing cells (OECs) on the repair of the spinal cord. Human olfactory ensheathing cells were isolated from the human mucosa and cultured under supplemented neuronal cell culture medium. They were characterized by immunocytochemistry for olfactory ensheathing cell markers. We induced spinal cord injury at T8-T9 of rats by aneurysm clips and simultaneously injected two million OECs into subarachnoid space of spinal cord. Sensory and motor behaviors were recorded by tail-flick reflex (TFR) and BBB scores, respectively every week for seven weeks after injury. Morphology and S100-beta antigen expression in olfactory ensheathing cells of the human olfactory mucosa was confirmed by immunostaining. OECs transplantation did not recover inflammation, neuronal vacuolation, hemorrhage, and cyst formation. These findings suggest that OECs transplantation in this experimental setting did not lead to tissue regeneration to enhance locomotion. These results broaden current knowledge and are additions to the science and literature.


Keywords


Spinal cord injury; Olfactory ensheathing cells;Functional recovery; Rat

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