Abstract
Kaposi’s sarcoma-associated herpesvirus (KSHV) is the major
etiologic agent of Kaposi’s sarcoma, primary effusion lymphoma,
and multicentric Castleman’s disease. Recent studies
have indicated that KSHV can be detected at high frequency
in patient-derived bladder cancer tissue and might be associated
with the pathogenesis of bladder cancer. Bladder cancer
is the second most common cancer of the genitourinary
tract, and it has a high rate of recurrence. Because drug resistance
is closely related to chemotherapy failure and cancer
recurrence, we investigated whether KSHV infection is associated
with drug resistance of bladder cancer cells. Some
KSHV-infected bladder cancer cell lines showed resistance to
an anti-cancer drug, cisplatin, possibly as a result of downregulation
of reactive oxygen species. Additionally, drug resistance
acquired from KSHV infection could partly be overcome
by HDAC1 inhibitors. Taken together, the data suggest
the possible role of KSHV in chemo-resistant bladder
cancer, and indicate the therapeutic potential of HDAC1 inhibitors
in drug-resistant bladder cancers associated with
KSHV infection.
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