Potential use of chymotrypsin-like proteasomal activity as a biomarker for prostate cancer.

Abstract:

:Although it is the most widely used biomarker for prostate cancer, the use of prostate specific antigen (PSA) is controversial due to its limitations in specificity and sensitivity. The proteasome is a complex associated with cell proliferation and apoptosis, and the abnormity of these processes may lead to tumor occurrence. Previous studies have reported that proteasomal activity is associated with cancer progression and can be used in risk stratification. The purpose of the present study was thus to investigate the feasibility of proteasome activity as a biomarker for prostate cancer. Proteasome activity in vitro and in vivo was detected, along with the expression of the substrate proteins NF-κB inhibitor-α (IκB-α), Bcl-2-associated X (Bax) and p27. Chymotrypsin-like proteasomal activity was elevated by 70% in vitro and 23% in vivo, and the expression levels of the proteasome substrate proteins IκB-α, Bax and p27 were decreased in prostate cancer cells and prostate tumor xenografts compared with normal mouse prostate tissue. In conclusion, proteasomal chymotrypsin-like activity maybe a potential biomarker for prostate cancer, and may be suitable to supplement PSA in clinical application for prostate cancer diagnosis.

journal_name

Oncol Lett

journal_title

Oncology letters

authors

Wei X,Zeng W,Xie K,Diao P,Tang P

doi

10.3892/ol.2018.7936

subject

Has Abstract

pub_date

2018-04-01 00:00:00

pages

5149-5154

issue

4

eissn

1792-1074

issn

1792-1082

pii

OL-0-0-7936

journal_volume

15

pub_type

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