Abnormal antibody responses in patients with persistent generalized lymphadenopathy

Area of Science:

• Immunology
• Virology
• Infectious Diseases

Background:

• Persistent, generalized lymphadenopathy (PGL) is a clinical manifestation of human immunodeficiency virus (HIV) infection.
• Understanding the impact of PGL on immune function is crucial for managing HIV.

Observation:

• Longitudinal studies assessed B and T cell function in seven homosexual men with HIV and PGL.
• Immune responses were evaluated using T-dependent and T-independent antigens, as well as recall antigens.

Findings:

• Patients with PGL exhibited abnormal antibody-mediated immunity, including lower antibody titers and impaired immunologic memory.
• A failure to switch from IgM- to IgG-isotype antibodies was observed post-immunization.
• In vitro antibody production was diminished, with some patients showing reduced mitogen responses.

Implications:

• A correlation exists between the severity of immune compromise and clinical condition in HIV-PGL patients.
• Despite significant immunologic impairment, a subset of patients remained clinically stable for up to three years.
• These findings highlight the complex interplay between immune status and clinical progression in HIV infection.