Published 2018
| Version v1
Publication
CD8+CD28-CD127loCD39+regulatory T-cell expansion: A new possible pathogenic mechanism for HIV infection?
Creators
- Fenoglio, Daniela
- Dentone, Chiara
- Signori, Alessio
- Di Biagio, Antonio
- Parodi, Alessia
- Kalli, Francesca
- Nasi, Giorgia
- Curto, Monica
- Cenderello, Giovanni
- De Leo, Pasqualina
- Bartolacci, Valentina
- Orofino, Giancarlo
- Nicolini, Laura Ambra
- Taramasso, Lucia
- Fiorillo, Edoardo
- Orrù, Valeria
- Traverso, Paolo
- Bruzzone, Bianca
- Ivaldi, Federico
- Mantia, Eugenio
- Guerra, Michele
- Negrini, Simone
- Giacomini, Mauro
- Bhagani, Sanjay
- Filaci, Gilberto
Contributors
Others:
- Fenoglio, Daniela
- Dentone, Chiara
- Signori, Alessio
- Di Biagio, Antonio
- Parodi, Alessia
- Kalli, Francesca
- Nasi, Giorgia
- Curto, Monica
- Cenderello, Giovanni
- De Leo, Pasqualina
- Bartolacci, Valentina
- Orofino, Giancarlo
- Nicolini, Laura Ambra
- Taramasso, Lucia
- Fiorillo, Edoardo
- Orrù, Valeria
- Traverso, Paolo
- Bruzzone, Bianca
- Ivaldi, Federico
- Mantia, Eugenio
- Guerra, Michele
- Negrini, Simone
- Giacomini, Mauro
- Bhagani, Sanjay
- Filaci, Gilberto
Description
Background: HIV-associated immunodeficiency is related to loss of CD4+T cells. This mechanism does not explain certain manifestations of HIV disease, such as immunodeficiency events in patients with greater than 500 CD4+T cells/μL. CD8+CD28-CD127loCD39+T cells are regulatory T (Treg) lymphocytes that are highly concentrated within the tumor microenvironment and never analyzed in the circulation of HIV-infected patients. Objectives: We sought to analyze the frequency of CD8+CD28-CD127loCD39+Treg cells in the circulation of HIV-infected patients. Methods: The frequency of circulating CD8+CD28-CD127loCD39+Treg cells was analyzed and correlated with viral load and CD4+T-cell counts/percentages in 93 HIV-1-infected patients subdivided as follows: naive (n = 63), elite controllers (n = 19), long-term nonprogressors (n = 7), and HIV-infected patients affected by tumor (n = 4). The same analyses were performed in HIV-negative patients with cancer (n = 53), hepatitis C virus-infected patients (n = 17), and healthy donors (n = 173). Results: HIV-infected patients had increased circulating levels of functional CD8+CD28-CD127loCD39+Treg cells. These cells showed antigen specificity against HIV proteins. Their frequency after antiretroviral therapy (ART) correlated with HIV viremia, CD4+T-cell counts, and immune activation markers, suggesting their pathogenic involvement in AIDS- or non-AIDS-related complications. Their increase after initiation of ART heralded a lack of virologic or clinical response, and hence their monitoring is clinically relevant. Conclusion: HIV infection induces remarkable expansion of CD8+CD28-CD127loCD39+Treg cells, the frequency of which correlates with both clinical disease and signs of chronic immune cell activation. Monitoring their frequency in the circulation is a new marker of response to ART when effects on viremia and clinical response are not met.
Additional details
Identifiers
- URL
- http://hdl.handle.net/11567/889112
- URN
- urn:oai:iris.unige.it:11567/889112
Origin repository
- Origin repository
- UNIGE