Mesenchymal stem cell‐based treatments for stroke, neural trauma, and heat stroke

Brain and Behavior - Tập 6 Số 10 - 2016
Yogi Hsuan1, Cheng‐Hsien Lin1, Ching‐Ping Chang2, Mao‐Tsun Lin2
1Meridigen Biotech CO., Ltd. Neihu Taipei Taiwan
2Department of Medical Research, Chi Mei Medical Center, Tainan, Taiwan

Tóm tắt

AbstractBackground

Mesenchymal stem cell (MSC) transplantation has been reported to improve neurological function following neural injury. Many physiological and molecular mechanisms involving MSC therapy‐related neuroprotection have been identified.

Methods

A review is presented of articles that pertain to MSC therapy and diverse brain injuries including stroke, neural trauma, and heat stroke, which were identified using an electronic search (e.g., PubMed), emphasize mechanisms of MSC therapy‐related neuroprotection. We aim to discuss neuroprotective mechanisms that underlie the beneficial effects of MSCs in treating stroke, neural trauma, and heatstroke.

Results

MSC therapy is promising as a means of augmenting brain repair. Cell incorporation into the injured tissue is not a prerequisite for the beneficial effects exerted by MSCs. Paracrine signaling is believed to be the most important mediator of MSC therapy in brain injury. The multiple mechanisms of action of MSCs include enhanced angiogenesis and neurogenesis, immunomodulation, and anti‐inflammatory effects. Microglia are the first source of the inflammatory cascade during brain injury. Cytokines, including tumor necrosis factor‐α, interleukin‐1β, and interleukin‐6, are significantly produced by microglia in the brain after experimental brain injury. The proinflammatory M1 phenotype of microglia is associated with tissue destruction, whereas the anti‐inflammatory M2 phenotype of microglia facilitates repair and regeneration. MSC therapy may improve outcomes of ischemic stroke, neural trauma, and heatstroke by inhibiting the activity of M1 phenotype of microglia but augmenting the activity of M2 phenotype of microglia.

Conclusion

This review offers a testable platform for targeting microglial‐mediated cytokines in clinical trials based upon the rational design of MSC therapy in the future. MSCs that are derived from the placenta provide a great choice for stem cell therapy. Although targeting the microglial activation is an important approach to reduce the burden of the injury, it is not the only one. This review focuses on this specific aspect.

Từ khóa


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Brain and Behavior

Tập 6 Số 10

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