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Tafazzin Protein Expression Is Associated with Tumorigenesis and Radiation Response in Rectal Cancer: A Study of Swedish Clinical Trial on Preoperative Radiotherapy
Linköping University, Linköping, Sweden; County Council of Östergötland, Linköping, Sweden.
Linköping University, Linköping, Sweden; County Council of Östergötland, Linköping, Sweden; West China Hospital, Sichuan University, Chengdu, China.
Örebro University, School of Medicine, Örebro University, Sweden.
Linköping University, Linköping, Sweden; County Council of Östergötland, Linköping, Sweden.
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2014 (English)In: PLoS ONE, ISSN 1932-6203, E-ISSN 1932-6203, Vol. 9, no 5, article id e98317Article in journal (Refereed) Published
Abstract [en]

Background: Tafazzin (TAZ), a transmembrane protein contributes in mitochondrial structural and functional modifications through cardiolipin remodeling. TAZ mutations are associated with several diseases, but studies on the role of TAZ protein in carcinogenesis and radiotherapy (RT) response is lacking. Therefore we investigated the TAZ expression in rectal cancer, and its correlation with RT, clinicopathological and biological variables in the patients participating in a clinical trial of preoperative RT.

Methods: 140 rectal cancer patients were included in this study, of which 65 received RT before surgery and the rest underwent surgery alone. TAZ expression was determined by immunohistochemistry in primary cancer, distant, adjacent normal mucosa and lymph node metastasis. In-silico protein-protein interaction analysis was performed to study the predictive functional interaction of TAZ with other oncoproteins.

Results: TAZ showed stronger expression in primary cancer and lymph node metastasis compared to distant or adjacent normal mucosa in both non-RT and RT patients. Strong TAZ expression was significantly higher in stages I-III and non-mucinious cancer of non-RT patients. In RT patients, strong TAZ expression in biopsy was related to distant recurrence, independent of gender, age, stages and grade (p = 0.043, HR, 6.160, 95% CI, 1.063-35.704). In silico protein-protein interaction study demonstrated that TAZ was positively related to oncoproteins, Livin, MAC30 and FXYD-3.

Conclusions: Strong expression of TAZ protein seems to be related to rectal cancer development and RT response, it can be a predictive biomarker of distant recurrence in patients with preoperative RT.

Place, publisher, year, edition, pages
San Francisco: Public Library Science , 2014. Vol. 9, no 5, article id e98317
National Category
Medical and Health Sciences Cancer and Oncology
Research subject
Medicine
Identifiers
URN: urn:nbn:se:oru:diva-35835DOI: 10.1371/journal.pone.0098317ISI: 000336839400065PubMedID: 24858921Scopus ID: 2-s2.0-84901467875OAI: oai:DiVA.org:oru-35835DiVA, id: diva2:735684
Funder
Swedish Research CouncilSwedish Cancer Society
Note

Funding Agency:

Health Research Council in the South-East of Sweden

Available from: 2014-07-30 Created: 2014-07-30 Last updated: 2018-06-07Bibliographically approved

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