Consistent with our findings, previous clinical and animal studies have found increased serum TNF‐α and IFN‐γ levels in MG.30, 31 In addition, intervention with cytokines has been shown to alleviate MG severity.32 Significantly, the MMb mice reproduced the key fecal microbial and metabolic characteristics of MG patients. The gene discussed is TNF; the disease is myasthenia gravis.