title: Role of tumor necrosis factor alpha-induced protein 1 in paclitaxel resistance.
abstract: Paclitaxel has been extensively used as an antitumor drug to treat a broad range of epithelial cancers, including breast and cervical cancers. However, the efficacy of this drug is greatly limited by the development of acquired resistance. Identification of the underlying resistance mechanisms may inform the development of new therapies that elicit long-term response of tumors to paclitaxel treatment. Here we report that increased expression of TNFAIP1 (tumor necrosis factor alpha-induced protein 1) confers acquired resistance to paclitaxel. TNFAIP1 is shown to compete with paclitaxel for binding to β-tubulin, thereby preventing paclitaxel-induced tubulin polymerization, cell cycle arrest and ultimate cell death. We also show that expression of TNFAIP1 is regulated by the transcriptional factor Sp1. In a xenograft mouse model, increased expression of TNFAIP1 decreases, whereas knockdown of TNFAIP1 increases tumor response to paclitaxel. Therefore, these results reveal tnfaip1 as a novel paclitaxel-resistance associated gene and suggest that TNFAIP1 may represent a valuable therapeutic target for the treatment of cancer.
authors.affiliation: Hefei National Laboratory for Physical Sciences at Microscale and School of Life Sciences, University of Science and Technology of China, Anhui, China.
authors.forename: Y
authors.initials: Y
authors.lastname: Zhu
authors.affiliation: Hefei National Laboratory for Physical Sciences at Microscale and School of Life Sciences, University of Science and Technology of China, Anhui, China.
authors.forename: Z
authors.initials: Z
authors.lastname: Yao
authors.affiliation: Department of Pathology, Anhui Medical University, Anhui, China.
authors.forename: Z
authors.initials: Z
authors.lastname: Wu
authors.affiliation: Hefei National Laboratory for Physical Sciences at Microscale and School of Life Sciences, University of Science and Technology of China, Anhui, China.
authors.forename: Y
authors.initials: Y
authors.lastname: Mei
authors.affiliation: Hefei National Laboratory for Physical Sciences at Microscale and School of Life Sciences, University of Science and Technology of China, Anhui, China.
authors.forename: M
authors.initials: M
authors.lastname: Wu
mesh_terms: D048868:Adaptor Proteins, Signal Transducing; D000818:Animals; D059447:Cell Cycle Checkpoints / Q000187:drug effects / Q000235:genetics; D016923:Cell Death / Q000187:drug effects / Q000235:genetics; D045744:Cell Line, Tumor; D019008:Drug Resistance, Neoplasm; D015972:Gene Expression Regulation, Neoplastic; D006367:HeLa Cells; D006801:Humans; D007136:Immunoglobulins / Q000235:genetics / Q000378:metabolism; D051379:Mice; D008819:Mice, Nude; D017239:Paclitaxel / Q000494:pharmacology*; D011506:Proteins / Q000235:genetics* / Q000378:metabolism*; D014157:Transcription Factors / Q000235:genetics / Q000378:metabolism; D014404:Tubulin / Q000235:genetics / Q000378:metabolism
chemical_list: D048868:Adaptor Proteins, Signal Transducing; D007136:Immunoglobulins; D011506:Proteins; C090698:SP1 antigen; C115968:TNFAIP1 protein, human; D014157:Transcription Factors; D014404:Tubulin; D017239:Paclitaxel