In vitro modification of human immunodeficiency virus type 1 (HIV-1) infectivity by the U937 cells.

Abstract:

:The effect of host cell factors on infectivity of human immunodeficiency virus type 1 (HIV-1) was studied by infecting a monoblastoid cell line (U937) or a T-cell line (MOLT-4) with a highly infective single clone of HIV-1 and comparing the infectivity of the produced viruses to different cell lines. Chronically infected U937 cells consistently produced viruses with minimal infectivity. This phenotypic change was host-dependent as the back-passage of the U937-produced low infective viruses into MOLT-4 cells resulted in regaining their original high infectivity. Southern and Northern blot analyses of the HIV-1 grown in U937 cells did not reveal any genomic difference between it and the virus grown it MOLT-4 cells. The radioimmunoprecipitation analysis of viral proteins showed that the HIV-1-infected U937 cells had a different pattern of envelope glycoproteins and core proteins, which well correlated with the low infectivity of the produced viruses. This experimental system using MOLT-4 and U937 cell lines would be useful to further explore host cell factor(s) which play an important role in the regulation of HIV-1 infectivity.

journal_name

Microbiol Immunol

authors

el-Farrash MA,Masuda T,Kuroda MJ,Harada S

doi

10.1111/j.1348-0421.1993.tb03221.x

subject

Has Abstract

pub_date

1993-01-01 00:00:00

pages

349-57

issue

5

eissn

0385-5600

issn

1348-0421

journal_volume

37

pub_type

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