Rapamycin alleviates mitochondrial dysfunction in anti-NMDAR encephalitis mice.

Area of Science:

• Neuroscience
• Immunology
• Cell Biology

Background:

• Anti-N-methyl-D-aspartate receptor (NMDAR) encephalitis is a common autoimmune disorder causing neurological and psychiatric symptoms.
• The precise pathological mechanisms underlying anti-NMDAR encephalitis are not fully understood.

Purpose of the Study:

• To investigate the role of mitochondrial dysfunction in anti-NMDAR encephalitis.
• To explore the therapeutic potential of targeting the mTOR signaling pathway with rapamycin.

Main Methods:

• Active immunization in a mouse model of anti-NMDAR encephalitis.
• Assessment of mitochondrial fission, autophagic flux, mitochondrial reactive oxygen species (mtROS), and mitochondrial DNA (mtDNA).
• Evaluation of the mechanistic target of rapamycin (mTOR) signaling pathway and the effects of rapamycin treatment.

Main Results:

• Mice with anti-NMDAR encephalitis exhibited increased mitochondrial fission and blocked autophagic flux, leading to elevated mtROS and mtDNA.
• Overactivation of the mTOR pathway exacerbated mitochondrial dysfunction.
• Rapamycin treatment inhibited mitochondrial fission, enhanced autophagy, reduced mtROS and mtDNA, and improved cognitive and behavioral impairments.

Conclusions:

• Mitochondrial dysfunction is a key pathological factor in anti-NMDAR encephalitis.
• Targeting the mTOR pathway with rapamycin shows therapeutic promise for anti-NMDAR encephalitis.