Abstract
HIV assembly has been intensively studied as the assembly and release of cell-free virus. However, it is becoming increasingly clear that HIV can also bypass cell-free spread by direct transmission from cell to cell across zones of tight contact designated virological synapses. Here, we introduce the concept of the virological synapse, compare it with that of immunological synapses, and discuss current virological synapse models to explain HIV spread in different lymphocytes. We will discuss how cell–cell contact modifies the classical life cycle of cell-free HIV in the donor as well as in the target cell. Finally, because HIV cell-to-cell transmission can be more resistant than cell-free virus to restriction factors, neutralizing antibodies, and anti-retroviral therapies, it may also affect the pathogenesis of HIV/AIDS.
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- APC:
-
Antigen-presenting cell
- DC:
-
Dendritic cell
- Env:
-
Viral envelope glycoprotein
- Gag:
-
General antigen polyprotein precursor
- HIV:
-
Human immunodeficiency virus 1
- HTLV-1:
-
Human lymphotropic virus 1
- ICAM-1:
-
Intercellular Adhesion Molecule 1
- IS:
-
Immunological synapse
- LFA-1:
-
Lymphocyte function-associated antigen 1
- MHC:
-
Major histocompatibility complex
- MLV:
-
Murine leukemia virus
- MOI:
-
Multiplicity of infection
- Nef:
-
Negative factor
- Pol:
-
Polymerase
- SMAC:
-
Supramolecular activation cluster
- TCR:
-
T cell receptor
- TRIM5-α:
-
Tripartite motif 5-alpha
- Vpu:
-
Viral protein u
- VS:
-
Virological synapse
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Agosto, L.M., Zhong, P., Mothes, W. (2013). Cell-to-Cell Transmission of HIV. In: Freed, E. (eds) Advances in HIV-1 Assembly and Release. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-7729-7_7
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