How does HIV/AIDS cause cardiomyopathy? |
HIV/AIDS-related cardiomyopathy
is a relatively recent concern. Only
in the last decade, thanks to antiretroviral
therapy, have human immunodeficiency
virus type 1 (HIV 1)
infection and acquired immunodeficiency
syndrome (AIDS) become
chronic, at least in the developed
world. For this reason, and because
of confounding factors (comorbidity,
the iatrogenic impact of nucleoside
reverse transcriptase inhibitors) and
widely differing study populations,
some major issues remain unresolved:
the prevalence of cardiomyopathy
in HIV infection (figures
range from zero to 10%), the cellular
target of HIV (cardiomyocytes
lack CD4 receptors), and the specific
impact, if any, of cardiac HIV
infection. However, there is now
strong evidence, found in around
half of autopsy cases, that underlying
the cardiomyopathy is a myocarditis
resulting from interaction
between cytokines and HIV structural
proteins...
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