Systemic inflammatory networks in HIV-associated chronic obstructive pulmonary disease.

Area of Science:

• Immunology
• Pulmonology
• Infectious Diseases

Background:

• People living with HIV (PLWH) have a higher risk of chronic obstructive pulmonary disease (COPD).
• The biological mechanisms driving this increased risk are not well understood.
• Investigating systemic inflammation may reveal key differences between PLWH with and without COPD.

Purpose of the Study:

• To determine if systemic inflammatory profiles differ between PLWH with and without COPD.
• To identify specific inflammatory markers and pathways associated with COPD in PLWH.

Main Methods:

• Serum samples from 87 PLWH (38 with COPD, 49 without) were analyzed for inflammatory proteins using the Olink Target 96 Inflammation panel.
• CytoMod identified modules of co-varying analytes, and associations with clinical features were tested.
• Key findings were validated using ELISA and replicated in an independent cohort.

Main Results:

• PLWH with COPD exhibited significantly elevated inflammatory markers compared to those without COPD.
• Two distinct inflammatory modules associated with COPD were identified, involving molecules related to tissue damage and repair.
• Specific molecules like PD-L1, FGF-23, IL-6, IL-10RB, and M-CSF were significantly dysregulated in PLWH with COPD.

Conclusions:

• PLWH with COPD display unique inflammatory signatures characterized by heightened tissue damage, immune activation, and altered repair processes.
• These findings provide novel insights into the pathogenesis of HIV-associated COPD.
• Understanding these inflammatory mechanisms could inform future therapeutic strategies for PLWH with COPD.