SARS-CoV-2 and HIV: Impact on Pulmonary Epithelial Cells

Area of Science:

• Immunology
• Virology
• Cell Biology

Background:

• The COVID-19 pandemic highlights risks for individuals with chronic infections like HIV.
• Understanding interactions between HIV and SARS-CoV-2 is crucial for public health.
• Prior HIV status impact on COVID-19 severity requires investigation.

Purpose of the Study:

• To characterize the impact of SARS-CoV-2 on human bronchial epithelial cells (HBECs) with prior HIV exposure.
• To analyze cellular stress, toxicity, and immune responses in an in vitro model.

Main Methods:

• Optimized air-liquid interface (ALI) culture for HBECs.
• Simulated HIV exposure (basolateral) and SARS-CoV-2 spike protein challenge (apical).
• Genetic analyses of cellular stress, toxicity, and immune signaling pathways (e.g., IL-10, NF-kB).

Main Results:

• Interleukin-10 (IL-10) pathway consistently activated by spike, HIV, or combination.
• SARS-CoV-2 spike protein triggered cytokine storms; HIV modulated distinct pathways.
• HIV impaired NF-kB activation and pro-inflammatory signaling; combined exposure affected ER-phagosome and non-canonical NF-kB pathways.

Conclusions:

• In vitro findings suggest prior HIV infection may not exacerbate COVID-19.
• HIV alters cellular responses to SARS-CoV-2, impacting immune signaling.
• Further in vivo studies are necessary to confirm these findings in a broader context.