Interferon-α exacerbates neuropsychiatric phenotypes in lupus-prone mice

Area of Science:

• Immunology
• Neuroscience
• Genetics

Background:

• Neuropsychiatric systemic lupus erythematosus (NP-SLE) is a significant lupus manifestation with unknown mechanisms.
• Type I interferon (IFN) signaling pathway activation is implicated in SLE and NP-SLE, but IFN-α's specific role in NP-SLE encephalopathy is understudied.

Purpose of the Study:

• To investigate the effect of IFN-α on the development of neuropsychiatric symptoms in a mouse model.
• To establish a comprehensive mouse model for NP-SLE to facilitate mechanistic studies and therapeutic development.

Main Methods:

• Administered intravenous Adv-IFN-α to mice and assessed behavioral phenotypes using various tests (e.g., elevated plus-maze, open-field test).
• Evaluated gene expression via RT-qPCR, detected antibodies using ELISA, and analyzed kidney histology (H&E, PAS staining).

Main Results:

• IFN-α-treated mice exhibited anxiety-like, depression-like behaviors, social deficits, and cognitive impairments.
• These induced phenotypes closely mimicked the neuropsychiatric manifestations observed in NP-SLE, with similar onset and progression.

Conclusions:

• IFN-α plays a critical role in the pathogenesis of NP-SLE.
• The developed mouse model serves as a valuable tool for understanding NP-SLE mechanisms and exploring therapeutic interventions.