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Co-immunoprecipitation Assay Using Endogenous Nuclear Proteins from Cells Cultured Under Hypoxic Conditions
Published on: August 2, 2018
The RNA-Binding Proteins Promote Resistance of Microglial Cells to Hypoxia
Mohammad Khosravi1, Zohreh Ghotbeddin2, Sorour Chinipardaz3
1Department of Pathobiology, Faculty of Veterinary Medicine, Shahid Chamran University of Ahvaz, Ahvaz, Iran.
Introduction:
Microglial cells play a crucial role in responding to brain hypoxia. This study aimed to evaluate the effect of RNA-binding proteins (RBPs) on the resistance of microglial cells to hypoxia.
Methods:
Newborn rats were subjected to hypoxia under four conditions: hypoxia (H), one week after hypoxia induction (H1), control (C), and control one week after hypoxia induction (C1). Microglial cells were isolated and cultured, and exosomes were extracted from brain samples of healthy newborn rats of C1 group. RBPs were extracted from the aforementioned groups and transferred into the microglial cells using exosomes from the C1 group. Cell viability, expression of specific RBP genes, and innate immune factors were evaluated in the studied groups. Additionally, exosomes containing RBPs were injected into the hypoxic rats to investigate behavioral changes in-vivo.
Results:
The treatment of microglial cells with C1 exosomes elevated the viability rate. The RBP-H proteins significantly elevated the expression of the CPE, HIF-1α, PDI, and VEGF-A genes. Improvements in anti-protease activity, along with decreases in lysozyme and myeloperoxidase activity, were observed in hypoxic microglial cells following treatment with RBP-H and exosomes containing RBP-H. In vivo evaluations revealed that the hypoxic group treated with exosome loading with RBP-H exhibited significant improvements in recognition and balance maintenance.
Conclusion:
The RBPs may be considered a promising option for further studies in the treatment of brain disorders resulting from hypoxia.
Insights
RNA-binding proteins (RBPs) enhance microglial cell resistance to hypoxia. Treatment improved cell viability and reduced inflammatory markers, showing promise for treating hypoxic brain disorders.
Area of Science:
- Neuroscience
- Cell Biology
- Molecular Biology
Background:
- Microglial cells are key responders to brain hypoxia.
- RNA-binding proteins (RBPs) role in microglial response to hypoxia is under investigation.
Purpose of the Study:
- To evaluate the effect of RBPs on microglial cell resistance to hypoxia.
- To investigate RBP-mediated changes in cell viability and immune factors.
Main Methods:
- Hypoxia was induced in newborn rats; microglial cells were isolated and treated with RBPs via exosomes.
- Gene expression (CPE, HIF-1α, PDI, VEGF-A) and innate immune factors were analyzed.
- In vivo studies assessed behavioral changes after exosome-RBP treatment in hypoxic rats.
Main Results:
- Exosome treatment with RBPs (RBP-H) increased microglial viability and expression of key genes (CPE, HIF-1α, PDI, VEGF-A).
- RBP-H treatment improved anti-protease activity and reduced lysozyme/myeloperoxidase activity in hypoxic cells.
- In vivo, exosome-RBP treatment significantly improved recognition and balance in hypoxic rats.
Conclusions:
- RBPs show potential in enhancing microglial resistance to hypoxia.
- RBP-based therapies may offer a promising strategy for treating hypoxia-induced brain disorders.
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