Journal of Jilin University(Medicine Edition) ›› 2020, Vol. 46 ›› Issue (6): 1208-1214.doi: 10.13481/j.1671-587x.20200616

• Research in basic medicine • Previous Articles     Next Articles

Neuroprotective effect of nasal inhalation of miRNA-124 nanoparticles on ischemic stroke model rats

Rubin HAO1,Haotian WANG2,Lihua YANG3(),Chun MA4,Shuling Li4,Xinxin LI1,Tieshu LI1   

  1. 1.Department of Chinese Internal Medicine,School of Traditional Chinese Medicine,Changchun University of Chinese Medicine,Changchun 130117,China
    2.Department of Microbiology and Biochemical Pharmacy,Institute of Biopharmaceutics,School of Pharmacy,Jilin University,Changchun 130021,China
    3.Institute for Geriatrics,Affiliated Hospital,Changchun University of Chinese Medicine,Changchun 130021,China
    4.Department of Geriatrics,Affiliated Hospital,Changchun University of Chinese Medicine,Changchun 130021,China
  • Received:2020-03-13 Online:2020-11-28 Published:2022-08-24
  • Contact: Lihua YANG E-mail:ylh7239@126.com

Abstract: Objective

To investigate the pharmacodynamic effects of nasal inhalation of microRNA-124(miRNA-124) nanoparticles on the durg distribution in brain tissue, neurological function score, water content in brain tissue and levels of serum inflammatory factors in the ischemic stroke model rats, and to elucidate its neuroprotective effect on the rats with ischemia stroke.

Methods

The target RVG29 was coupled to the poly(ethylene glycol)-poly(lactic-co-glycolic acid)(PEG-PLGA) nanoparticles, the particle size and encapsulation efficiency of the prepared nanoparticles were measured.The PEG-PLGA nanoparticles modified with neurotropic virus-derived peptide RVG29 labeled near-infrared dye 1,1'-dioctadecyl-3,3,3,3-tetramethylindole three-carbon cyanine iodide (DiR)were given to the rats, and the durg biodistribution at different time points after nasal inhalation was measured. The rat model of cerebral ischemia-reperfusion was established by the suture method, and 90 rats were randomly divided into sham operation group, model group, Fasudil group, miRNA-124 nasal inhalation group, PEG-PLGA/miRNA-124 nasal inhalation group, and RVG29-PEG-PLGA/miRNA-124 nasal inhalation group, and there were 6 rats in each group. The neurological function scores and water contents in brain tissue of the rats in various groups were evaluated; the levels of interleukin-4(IL-4), interleukin-6(IL-6), tumor necrosis factor-α(TNF-α), and interleukin-1β (IL-1β)in peripheral serum of the rats in various groups were detected by ELISA method.

Results

The average particle size of RVG29-PEG-PLGA nanoparticles was 204 nm, and the encapsulation efficiency was 28%. The rats in sham operation group had no neurological dysfunction. Compared with sham operation group, the neurological function score, water content in brain tissue, and levels of serum IL-4, IL-6, TNF-α, and IL-1β of the rats in model group were increased (P<0.05). Compared with model group, the neurological function scores, water contents in brain tissue, and levels of serum IL-4, IL-6, TNF-α, and IL-1β of the rats in Fasudil group, miR-124 nasal inhalation group, PEG-PLGA/miRNA-124 nasal inhalation group, and RVG29-PEG-PLGA/miRNA-124 nasal inhalation group were decreased (P<0.05). Compared with Fasudil group, the neurological function score, water content in brain tissue, and levels of serum IL-4, IL-6, TNF-α, and IL-1β of the rats in RVG29-PEG-PLGA/miRNA-124 nasal inhalation group were decreased (P<0.05).

Conclusion

The RVG29-PEG-PLGA nanoparticles have a good ability of nasal inhalation into the brain. Intervention of nanoparticle-carrying miRNA-124 of the rats with ischemic stroke can improve the neurological dysfunction, reduce the cerebral edema and improve the inflammation, and exert the neuroprotection effect.

Key words: nanoparticles, cerebral ischemia-reperfusion, neuroprotection, nasal inhalation, RVG29

CLC Number: 

  • R743.3