Cytomegalovirus as a trigger for systemic lupus erythematosus

Area of Science:

• Immunology
• Infectious Diseases
• Rheumatology

Background:

• Systemic lupus erythematosus (SLE) is a chronic autoimmune disease.
• Cytomegalovirus (CMV) infections are common and can cause mononucleosis-like illness.
• The role of CMV in triggering SLE onset is debated.

Observation:

• A 43-year-old man presented with prolonged fever, lymphadenopathy, abnormal liver function, and leukopenia.
• He met diagnostic criteria for new-onset SLE, including positive autoantibodies (ANA, anti-dsDNA, anti-Sm/RNP, RF, anticardiolipin), low complement, and proteinuria.
• Laboratory results indicated an acute CMV infection (positive IgM, negative IgG).

Findings:

• The patient's clinical presentation and laboratory findings supported both acute CMV infection and new-onset SLE.
• Treatment with methylprednisolone and ganciclovir led to symptom improvement.

Implications:

• This case provides evidence supporting CMV infection as a potential trigger for SLE development in genetically predisposed individuals.
• Further research into the mechanisms of CMV-induced autoimmunity is warranted.
• Understanding viral triggers may offer new avenues for SLE prevention and management.