Abstract
Background: Alternate activation of monocytes could induce anti-inflammatory impacts. This study aimed to investigate whether monocyte cells treated with bone marrow mesenchymal stem cells supernatant (MSC-Sp) could improve anti-inflammatory responses as a cell transfer therapy for colitis. Materials and Methods: The induction of experimental colitis was done by acetic acid in four groups of male BALB/c mice, including the control colitis, treated-monocytes, non-treated-monocytes, and mesalazine groups. Following MSCs culture, the supernatant was harvested, and then 50% conditioned media, or negative control media was added to the monocytes for 24 h. After ten days, peritoneal injection of treated or non-treated-monocytes (105 cells/100µL) was performed in animals' relevant groups of colitis. Ten days later, the oxidative stress profile and histopathological evaluation of colon tissue were assessed. Results: Treated monocytes showed a significant improvement in the oxidative stress profile, namely myeloperoxidase (0.126±0.008), nitric oxide (0.153±0.01), and malondialdehyde (0.148±0.014) compared to the control colitis group (P<0.05). Also, histopathological results revealed that the rate of damage in the treated-monocytes group was less than in normal mice. Conclusion: Our study indicated that the treated monocytes had anti-oxidative potential in colitis mice and were usable as a complementary therapy. [GMJ.2021;10:e2131]
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