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Effective killing of cancer cells and regression of tumor growth by K27 targeting sulfiredoxin

Title
Effective killing of cancer cells and regression of tumor growth by K27 targeting sulfiredoxin
Authors
Kim J.Lee G.-R.Kim H.Jo Y.-J.Hong S.-E.Lee J.Lee H.I.Jang Y.-S.Oh S.-H.Lee H.J.Lee J.-S.Jeong W.
Ewha Authors
이화정정우진
SCOPUS Author ID
이화정scopus; 정우진scopus
Issue Date
2016
Journal Title
Free Radical Biology and Medicine
ISSN
0891-5849JCR Link
Citation
vol. 101, pp. 384 - 392
Keywords
ApoptosisCancerMitochondrial damageReactive oxygen speciesSulfiredoxin
Publisher
Elsevier Inc.
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
Cancer cells have been suggested to be more susceptible to oxidative damages and highly dependent on antioxidant capacity in comparison with normal cells, and thus targeting antioxidant enzymes has been a strategy for effective cancer treatment. Sulfiredoxin (Srx) is an enzyme that catalyzes the reduction of sulfinylated peroxiredoxins and thereby reactivates them. In this study we developed a Srx inhibitor, K27 (N-[7-chloro-2-(4-fluorophenyl)-4-quinazolinyl]-N-(2-phenylethyl)-β-alanine), and showed that it induces the accumulation of sulfinylated peroxiredoxins and oxidative stress, which leads to mitochondrial damage and apoptotic death of cancer cells. The effects of K27 were significantly reversed by ectopic expression of Srx or antioxidant N-acetyl cysteine. In addition, K27 led to preferential death of tumorigenic cells over non-tumorigenic cells, and suppressed the growth of xenograft tumor without acute toxicity. Our results suggest that targeting Srx might be an effective therapeutic strategy for cancer treatment through redox-mediated cell death. © 2016 Elsevier Inc.
DOI
10.1016/j.freeradbiomed.2016.11.001
Appears in Collections:
약학대학 > 약학과 > Journal papers
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