Abstract
The probability of HIV infection by sexual contact, although it varies greatly, appears to be lower than that of infection by other routes of exposure. The aim of this study was to evaluate immunological determinants involved in protection against HIV infection in subjects with multiple and repeated sexual exposures to the virus. Twenty-two subjects were studied for CD8+ cell anti-HIV suppression activity and serum neutralizing activity against the HIV strain of their own partners, β-chemokine production, and natural killer cell activity. CD8+ cell anti-HIV activity and neutralizing activity of sera were found in 13 (76%) and 12 (70.5%) out of 17 HIV-1 negative subjects, respectively. Six individuals had a relevant immune response against HIV: three subjects with a high CD8+ cell antiviral suppression activity and three individuals with sera neutralizing activity titer > 1:10. These last three subjects had the highest β-chemokine levels, a very prolonged period of multiple sexual intercourse (>6 years) and a seropositive partner with a high viral load. A partial reduction of neutralizing activity titer was observed when pre-incubating the sera with anti-β-chemokine neutralizing antibodies. A spontaneous natural killer cell activity was suppressed in the majority of HIV-1 negative subjects with sexual exposure in comparison with normal individuals. The protection from sexual HIV transmission appears to be the result of a network of different humoral and cellular factors.
| Original language | English |
|---|---|
| Pages (from-to) | 232-237 |
| Number of pages | 6 |
| Journal | Journal of Medical Virology |
| Volume | 64 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 2001 |
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Keywords
- CD8+
- HIV immune protection
- HIV-neutralizing activity
- Soluble antiviral factor
ASJC Scopus subject areas
- Virology
Cite this
Human immunodeficiency virus-1 specific and natural cellular immunity in HIV seronegative subjects with multiple sexual exposures to virus. / Nicastri, E.; Ercoli, L.; Sarmati, L.; d'Ettorre, G.; Iudicone, P.; Massetti, P.; Vullo, V.; Andreoni, M.
In: Journal of Medical Virology, Vol. 64, No. 3, 2001, p. 232-237.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Human immunodeficiency virus-1 specific and natural cellular immunity in HIV seronegative subjects with multiple sexual exposures to virus
AU - Nicastri, E.
AU - Ercoli, L.
AU - Sarmati, L.
AU - d'Ettorre, G.
AU - Iudicone, P.
AU - Massetti, P.
AU - Vullo, V.
AU - Andreoni, M.
PY - 2001
Y1 - 2001
N2 - The probability of HIV infection by sexual contact, although it varies greatly, appears to be lower than that of infection by other routes of exposure. The aim of this study was to evaluate immunological determinants involved in protection against HIV infection in subjects with multiple and repeated sexual exposures to the virus. Twenty-two subjects were studied for CD8+ cell anti-HIV suppression activity and serum neutralizing activity against the HIV strain of their own partners, β-chemokine production, and natural killer cell activity. CD8+ cell anti-HIV activity and neutralizing activity of sera were found in 13 (76%) and 12 (70.5%) out of 17 HIV-1 negative subjects, respectively. Six individuals had a relevant immune response against HIV: three subjects with a high CD8+ cell antiviral suppression activity and three individuals with sera neutralizing activity titer > 1:10. These last three subjects had the highest β-chemokine levels, a very prolonged period of multiple sexual intercourse (>6 years) and a seropositive partner with a high viral load. A partial reduction of neutralizing activity titer was observed when pre-incubating the sera with anti-β-chemokine neutralizing antibodies. A spontaneous natural killer cell activity was suppressed in the majority of HIV-1 negative subjects with sexual exposure in comparison with normal individuals. The protection from sexual HIV transmission appears to be the result of a network of different humoral and cellular factors.
AB - The probability of HIV infection by sexual contact, although it varies greatly, appears to be lower than that of infection by other routes of exposure. The aim of this study was to evaluate immunological determinants involved in protection against HIV infection in subjects with multiple and repeated sexual exposures to the virus. Twenty-two subjects were studied for CD8+ cell anti-HIV suppression activity and serum neutralizing activity against the HIV strain of their own partners, β-chemokine production, and natural killer cell activity. CD8+ cell anti-HIV activity and neutralizing activity of sera were found in 13 (76%) and 12 (70.5%) out of 17 HIV-1 negative subjects, respectively. Six individuals had a relevant immune response against HIV: three subjects with a high CD8+ cell antiviral suppression activity and three individuals with sera neutralizing activity titer > 1:10. These last three subjects had the highest β-chemokine levels, a very prolonged period of multiple sexual intercourse (>6 years) and a seropositive partner with a high viral load. A partial reduction of neutralizing activity titer was observed when pre-incubating the sera with anti-β-chemokine neutralizing antibodies. A spontaneous natural killer cell activity was suppressed in the majority of HIV-1 negative subjects with sexual exposure in comparison with normal individuals. The protection from sexual HIV transmission appears to be the result of a network of different humoral and cellular factors.
KW - CD8+
KW - HIV immune protection
KW - HIV-neutralizing activity
KW - Soluble antiviral factor
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U2 - 10.1002/jmv.1041
DO - 10.1002/jmv.1041
M3 - Article
VL - 64
SP - 232
EP - 237
JO - Journal of Medical Virology
JF - Journal of Medical Virology
SN - 0146-6615
IS - 3
ER -