Induction of expression of human immunodeficiency virus in a chronically infected promonocytic cell line by ultraviolet irradiation

Journal Article · Tue Aug 01 00:00:00 EDT 1989 · Aids Research and Human Retroviruses; (USA)

DOI:https://doi.org/10.1089/aid.1989.5.375· OSTI ID:5348108

Stanley, S K; Folks, T M; Fauci, A S ^[1]

---

1. National Institutes of Health, Bethesda, MD (USA)

Infection with the human immunodeficiency virus (HIV) is often followed by a prolonged latent state, and mechanisms of maintaining latency or inducing expression from latency are active areas in AIDS research. It has been previously shown using a variety of viruses and cell systems that ultraviolet (UV) irradiation is capable of inducing the expression of latent viruses as well as augmenting the effects of acute viral infection. The ability of UV irradiation to affect HIV latency was investigated using a chronically HIV-infected, virus nonexpressing promonocytic cell line termed U1. After exposure to UV-C in doses ranging from 0.75 to 2.0 mJ/cm{sup 2}, U1 cells were induced to express virus as assessed by detection of elevated reverse transcriptase activity and p24 antigen levels in culture supernatants of treated cells compared with unstimulated controls. In addition, immunofluorescence on cytospin preparations of UV-irradiated cells revealed a time-dependent increase in viral antigen production after UV stimulation. A similar increase in RT levels was seen after exposure of U1 cells to UV-B, although somewhat higher doses of UV-B (mJ) were required compared with UV-C (mJ). Viral induction by UV irradiation was associated with a drop in viability and a static growth curve, suggesting that a certain level of cellular stress was most likely necessary to initiate viral expression. The potential role of UV-induced cell damage with activation of a cellular SOS repair response is a probable explanation of the enhanced viral production observed.

• OSTI ID: 5348108
• Journal Information: Aids Research and Human Retroviruses; (USA), Vol. 5:4; ISSN 0889-2229
• Country of Publication: United States
• Language: English

Related Subjects

63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
AIDS VIRUS
BIOLOGICAL RADIATION EFFECTS
DNA POLYMERASES
ENZYME ACTIVITY
ANTIGENS
CELL DIVISION
DNA REPAIR
MAN
ULTRAVIOLET RADIATION
VIABILITY
ANIMALS
BIOLOGICAL EFFECTS
BIOLOGICAL RECOVERY
BIOLOGICAL REPAIR
ELECTROMAGNETIC RADIATION
ENZYMES
MAMMALS
MICROORGANISMS
NUCLEOTIDYLTRANSFERASES
PARASITES
PHOSPHORUS-GROUP TRANSFERASES
POLYMERASES
PRIMATES
RADIATION EFFECTS
RADIATIONS
RECOVERY
REPAIR
TRANSFERASES
VERTEBRATES
VIRUSES
560130* - Radiation Effects on Microorganisms