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Chinese Journal of Neurotraumatic Surgery(Electronic Edition) ›› 2022, Vol. 08 ›› Issue (04): 196-203. doi: 10.3877/cma.j.issn.2095-9141.2022.04.002

• Basic Research • Previous Articles     Next Articles

Effect of folic acid on Parkinson's like injury of HT22 cells through the NLRP3/ASC/Caspase-1 signaling pathway

Liya Ji1, Ang Ji2, Zhengli Di1, Jing Xiong1, Zhiqin Liu1, Xiuyun Xue1, Xiaowei Fei2, Yanan Dou2, Li Wang2,()   

  1. 1. Department of Neurology, Xi'an Third Hospital, Xi'an 710032, China
    2. Department of Neurosurgery, Xijing Hospital, Xi’an 710032, China
  • Received:2022-06-28 Online:2022-08-15 Published:2022-09-05
  • Contact: Li Wang

Abstract:

Objective

To investigate the effect of folic acid on Parkinson's like injury in mouse HT22 cells.

Methods

Mouse HT22 cells were used as the study subjects, and were randomly divided into four groups: Control group, MPP+ group (Model group), Folic acid group and MPP+ + Folic acid (Treatment group). CCK-8, LDH, TUNEL and immunofluorescence assay were used to detect the effect of folic acid on cell viability and expression of NLRP3 induced by MPP+. The effects of folic acid on the expression of NLRP3, ASC and Caspase-1 after MPP+-induced cell injury were detected by Western blot and qPCR. ELISA was used to detect the effect of folic acid on the expression of interleukin (IL)-18 and IL-1β after MPP+-induced cell injury. Finally, Western blot was used to examine the expression of ASC, Caspase-1, IL-18 and IL-1β after CY-09 treatment.

Results

MPP+ can cause Parkinson’s like injury to HT22 cells. The results of CCK-8, LDH and TUNEL experiments showed folic acid can significantly alleviate the decrease of cell viability and the increase of apoptotic cells caused by injury. Immunofluorescence test showed that folic acid could reduce the increase of NLRP3 fluorescence intensity in injured cells. Western blot and qPCR test showed that folic acid decreased the increase of NLRP3, ASC and Caspase-1 in protein level and mRNA level. ELISA results showed that folic acid treatment significantly alleviated the secretion of intracellular IL-18 and IL-1β after injury. Finally, Western blot showed that CY-09 could block the increase of ASC, Caspase-1 and IL-18 and IL-1β protein levels in cells after injury.

Conclusion

Folic acid can cause Parkinson's like injury to HT22 cells by decreasing IL-18 and IL-1β expression and protecting MPP+, and the potential protective mechanism may be closely related to the NLRP3/ASC/Caspase-1 signaling pathway.

Key words: Parkinson’s disease, Folic acid, NOD-like receptor protein 3, Interleukin-1β, Interleukin-18

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