PMID- 26031207 OWN - NLM STAT- MEDLINE DCOM- 20160119 LR - 20150929 IS - 1097-4652 (Electronic) IS - 0021-9541 (Linking) VI - 231 IP - 1 DP - 2016 Jan TI - Cell-penetrating and endoplasmic reticulum-locating TAT-IL-24-KDEL fusion protein induces tumor apoptosis. PG - 84-93 LID - 10.1002/jcp.25054 [doi] AB - Interleukin-24 (IL-24) is a unique IL-10 family cytokine that could selectively induce apoptosis in cancer cells without harming normal cells. Previous research demonstrated that intracellular IL-24 protein induces an endoplasmic reticulum (ER) stress response only in cancer cells, culminating in apoptosis. In this study, we developed a novel recombinant fusion protein to penetrate into cancer cells and locate on ER. It is composed of three distinct functional domains, IL-24, and the targeting domain of transactivator of transcription (TAT) and an ER retention four-peptide sequence KDEL (Lys-Asp-Glu-Leu) that link at its NH2 and COOH terminal, respectively. The in vitro results indicated that TAT-IL-24-KDEL inhibited growth in bladder cancer cells, as well as in non-small cell lung cancer cell line and breast cancer cell line, but the normal human lung fibroblast cell line was not affected, indicating the cancer specificity of TAT-IL-24-KDEL. Western blot analysis showed that apoptosis activation was induced by TAT-IL-24-KDEL through the ER stress-mediated cell death pathway. Treatment with TAT-IL-24-KDEL significantly inhibited the growth of human H460 xenografts in nude mice, and the tumor growth inhibition was correlated with increased hematoxylin and eosin (H&E) staining and terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling (TUNEL) staining. These findings suggest that the artificially designed recombinant fusion protein TAT-IL-24-KDEL may be highly effective in cancer therapy and worthy of further evaluation and development. CI - (c) 2015 Wiley Periodicals, Inc. FAU - Zhang, Jian AU - Zhang J AD - State Key Laboratory of Bioreactor Engineering, New World Institute of Biotechnology, East China University of Science and Technology, Shanghai, People's Republic of China. FAU - Sun, Aiyou AU - Sun A AD - State Key Laboratory of Bioreactor Engineering, New World Institute of Biotechnology, East China University of Science and Technology, Shanghai, People's Republic of China. FAU - Xu, Rui AU - Xu R AD - State Key Laboratory of Bioreactor Engineering, New World Institute of Biotechnology, East China University of Science and Technology, Shanghai, People's Republic of China. FAU - Tao, Xinyi AU - Tao X AD - State Key Laboratory of Bioreactor Engineering, New World Institute of Biotechnology, East China University of Science and Technology, Shanghai, People's Republic of China. FAU - Dong, Yuguo AU - Dong Y AD - State Key Laboratory of Bioreactor Engineering, New World Institute of Biotechnology, East China University of Science and Technology, Shanghai, People's Republic of China. FAU - Lv, Xinxin AU - Lv X AD - State Key Laboratory of Bioreactor Engineering, New World Institute of Biotechnology, East China University of Science and Technology, Shanghai, People's Republic of China. FAU - Wei, Dongzhi AU - Wei D AD - State Key Laboratory of Bioreactor Engineering, New World Institute of Biotechnology, East China University of Science and Technology, Shanghai, People's Republic of China. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - J Cell Physiol JT - Journal of cellular physiology JID - 0050222 RN - 0 (Interleukins) RN - 0 (Oligopeptides) RN - 0 (Protein Sorting Signals) RN - 0 (Recombinant Fusion Proteins) RN - 0 (interleukin-24) RN - 113516-56-6 (lysyl-aspartyl-glutamyl-leucine) SB - IM MH - Animals MH - Apoptosis/genetics/*physiology MH - Cell Line, Tumor MH - Endoplasmic Reticulum/*metabolism MH - Endoplasmic Reticulum Stress/genetics/*physiology MH - Humans MH - Interleukins/genetics/*metabolism MH - Mice MH - Mice, Nude MH - Neoplasms/metabolism/*pathology MH - Oligopeptides/*metabolism MH - Protein Sorting Signals MH - Recombinant Fusion Proteins/*metabolism EDAT- 2015/06/03 06:00 MHDA- 2016/01/20 06:00 CRDT- 2015/06/03 06:00 PHST- 2015/01/21 00:00 [received] PHST- 2015/05/20 00:00 [accepted] PHST- 2015/06/03 06:00 [entrez] PHST- 2015/06/03 06:00 [pubmed] PHST- 2016/01/20 06:00 [medline] AID - 10.1002/jcp.25054 [doi] PST - ppublish SO - J Cell Physiol. 2016 Jan;231(1):84-93. doi: 10.1002/jcp.25054.