Intracranial transplantation of human bone marrow mesenchymal stem cells alleviates rat brain ischemia-reperfusion injury

doi:10.12307/2024.709

Abstract

Abstract: BACKGROUND: Studies have found that activation of nuclear factor-erythroid 2-related factor 2/heme oxidase-1 (Nrf2/HO-1) pathway can alleviate oxidative stress caused by cerebral ischemia-reperfusion injury, but whether human bone marrow mesenchymal stem cells (hBMSC) can activate Nrf2/HO-1 pathway to alleviate cerebral ischemia-reperfusion injury is still lacking relevant studies.
OBJECTIVE: To investigate whether intracranial transplantation of hBMSC alleviates oxidative stress injury in cerebral ischemia-reperfusion animal models by activating Nrf2/HO-1 pathway.
METHODS: Totally 40 male SPF SD rats were randomly divided into sham operation group, model group, hBMSC transplantation group, hBMSC+solvent group and hBMSC+Nrf2 inhibitor group. Each group consisted of eight animals. In the model group and the hBMSC transplantation group, middle cerebral artery occlusion model was prepared by thread embolization method. The thread embolization was removed 1 hour later, and 30 μL PBS or hBMSC cultured to at least passage 5 was injected into the right cortex and striatum of rats. In the hBMSC+Nrf2 inhibitor group and hBMSC+solvent group, the left ventricle was injected with Nrf2 inhibitor Brusatol and its solvent dimethyl sulfoxide respectively 24 hours before model establishment, then the middle cerebral artery occlusion model was prepared, and hBMSC was injected. Relevant indexes were detected 3 days after transplantation.
RESULTS AND CONCLUSION: (1) CT and TTC staining showed the same area and volume of cerebral infarction: model group > hBMSC+Nrf2 inhibitor group > hBMSC+solvent group > hBMSC transplantation group > sham operation group. (2) Hematoxylin-eosin staining and Nissl’s staining showed that the ischemic brain tissue was intact and the neurons were normal in the sham operation group. Compared with the model group, the pathological morphology and neuronal injury of the hBMSC transplantation group and the hBMSC+solvent group were significantly improved. Compared with the hBMSC+solvent group, the hBMSC+Nrf2 inhibitor group had more serious pathological morphology and neuronal damage. (3) Western blot assay and oxidative stress index detection results showed that compared with the sham operation group, Nrf2 and HO-1 proteins were decreased (all P < 0.05), malondialdehyde was increased and superoxide dismutase was decreased (all P < 0.05) in the model group. Compared with the model group, the expression levels of Nrf2 and HO-1 proteins were increased (all P < 0.05), malondialdehyde was decreased and superoxide dismutase was increased (all P < 0.05) in the hBMSC transplantation group and the hBMSC+solvent group. Compared with the hBMSC+solvent group, the expression levels of Nrf2 and HO-1 proteins were simultaneously decreased (all P < 0.05), and malondialdehyde was increased and superoxide dismutase was decreased (all P < 0.05) in the hBMSC+Nrf2 inhibitor group. (4) These results indicate that hBMSC can alleviate cerebral ischemia-reperfusion injury possibly by activating Nrf2/HO-1 pathway.

Key words: human bone marrow mesenchymal stem cell, cerebral ischemia-reperfusion injury, oxidative stress, nuclear factor-erythroid 2-related factor 2, heme oxidase-1

CLC Number:

Song Wenxue, Liao Yidong, Ming Jiang, He Longcai, Chen Guangtang, Chen Chen, Wang Zili, Xiong Mingsong, Cui Junshuan, Xu Kaya. Intracranial transplantation of human bone marrow mesenchymal stem cells alleviates rat brain ischemia-reperfusion injury[J]. Chinese Journal of Tissue Engineering Research, 2024, 28(31): 5036-5041.

Figures/Tables 6

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