Long-term productive human immunodeficiency virus infection of CD1a-sorted myeloid dendritic cells

Area of Science:

• Virology
• Immunology
• Cell Biology

Background:

• Dendritic cells (DCs) are key immune cells involved in initiating adaptive immune responses.
• Human immunodeficiency virus (HIV) infects various immune cells, including T cells and macrophages.
• The role of DCs as persistent reservoirs for HIV replication and transmission is not fully understood.

Purpose of the Study:

• To investigate the capacity of myeloid, CD1a-sorted dendritic cells (MDCs) to support productive HIV replication.
• To determine if MDCs can serve as a long-term reservoir for infectious HIV.

Main Methods:

• MDCs were infected with HIV strains encoding X4R5 or R5 envelope genes.
• Cells were cultured for up to 45 days to assess viral replication.
• Supernatants from infected MDCs were tested for infectiousness by co-culture with activated T cells.

Main Results:

• MDCs productively replicated HIV strains for up to 45 days.
• Cell-free supernatant from MDCs infected 45 days prior remained infectious to T cells.
• Evidence suggests MDCs can maintain infectious HIV over prolonged periods.

Conclusions:

• Dendritic cells can act as a persistent reservoir for infectious HIV.
• These findings highlight the potential role of MDCs in HIV persistence and transmission.
• Further research into DC-mediated HIV reservoirs is warranted.