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Jeng-Yuan Shiau, Kyoko Nakagawa-Goto, Kuo-Hsiung Lee, and Lie-Fen Shyur* (2017) Phytoagent deoxyelephantopin derivative inhibits triple negative breast cancer cell activity by inducing oxidative stress-mediated paraptosis-like cell death. Oncotarget, 2017, 8:56942-56958
Triple negative breast cancer (TNBC) is a highly metastatic cancer among the breast cancer subgroups. A thorny issue for clinical therapy of TNBC is lack of an efficient targeted therapeutic strategy. We previously created a novel sesquiterpene lactone analog (named DETD-35) derived from plant deoxyelephantopin (DET) which exhibits potent effects against human TNBC MDA-MB-231 tumor growth in a xenograft mouse model. Here we studied the mechanisms of both DET and DETD-35 against MDA-MB-231 cells. DETD-35 (3-fold decreased in IC50) exhibited better anti-TNBC cell activity than DET as observed through induction of reactive oxygen species production (within 2 h treatment) and damage to the ER structures, resulting in ER-derived cytoplasmic vacuolation and ubiquitinated protein accumulation in the treated cells. Intriguingly, the effects of both compounds were blockaded by pretreatment with ROS scavengers, N-acetylcysteine and reduced glutathione, and protein synthesis inhibitor, cycloheximide. Further, knockdown of MEK upstream regulator RAF1 and autophagosomal marker LC3, and co-treatment with JNK or ERK1/2 inhibitor resulted in the most significant attenuation of DETD-35{induced morphological and molecular or biochemical changes in cancer cells, while the inhibitory effect of DET was not influenced by MAPK inhibitor treatment. Therefore, DETD-35 exerted both ER stress-mediated paraptosis and apoptosis, which may explain its superior activity to DET against TNBC cells. Although the chemotherapeutic drug paclitaxel induced vacuole-like structures in MDA-MB-231 cells, no paraptotic cell death features were detected. This study provides a strategy for combating TNBC through sesquiterpene lactone analogs by induction of oxidative and ER stresses that cause paraptosis-like cell death. link

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*2017/12/18 10:30 AM
Dr. Anudep Rungsipipat (Associate Professor, Companion Animal Cancer Research Unit, Department of Veterinary Pathology, Faculty of Veterinary Science, Chulalongkorn University, Bangkok, Thailand)
Chemopreventive Effects of Thai Herbs on Mice Induced Colorectal Carcinogenesis
Auditorium A134, Agricultural Technology Building, Agricultural Biotechnology Research Center

*2017/12/22 10:30 AM
Hen-Hong Chang (Dean, School of Chinese Medicine, Distinguished Professor, China Medical University, Taiwan)
Herb, food and constitution in Traditional Chinese Medicine
Auditorium A134, Agricultural Technology Building, Agricultural Biotechnology Research Center

*2017/12/25 10:30 AM
Dr. Tsong-Long Hwang (Dean/Distinguished Professor, College of Human Ecology, Chang Gung University of Science and Technology, Taiwan)
Research on traditional herbal medicines for neutrophilic inflammatory diseases
Auditorium A134, Agricultural Technology Building, Agricultural Biotechnology Research Center

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Ji-Rong Yang, Chieh-Yu Cheng, Chih-Yuan Chen, Chao-Hua Lin, Chuan-Yi Kuo, Hsiang-Yi Huang, Fu-Ting Wu, Yu-Chih Yang, Chia-Ying Wu, Ming-Tsan Liu*, and Pei-Wen Hsiao* (2017) A virus-like particle vaccination strategy expands its tolerance to H3N2 antigenic drift by enhancing neutralizing antibodies against hemagglutinin stalk. Antiviral Research, 2017, 140: 62-75

Cindy Ast, Jessica Foret, Luke M. Oltrogge, Roberto De Michele, Thomas J. Kleist, Cheng-Hsun Ho & Wolf B. Frommer(2017) Ratiometric Matryoshka biosensors from a nested cassette of green- and orange-emitting fluorescent proteins.Nature Communications(2017), doi:10.1038/s41467-017-00400-2

Chin-Hsien Tsai, Sheue-Fen Tzeng, Shih-Chuan Hsieh, Chia-Jui Tsai, Yu-Chih Yang, Mong-Hsun Tsai and Pei-Wen Hsiao A Standardized Wedelia chinensis Extract Overcomes the Feedback Activation of HER2/3 Signaling upon Androgen-Ablation in Prostate Cancer. Frontiers in Pharmacology 2017 Oct; 8:721

Chin-Hsien Tsai, Sheue-Fen Tzeng, Shih-Chuan Hsieh, Yu-Chih Yang, Yi-Wen Hsiao, Mong-Hsun Tsai, and Pei-Wen Hsiao (2017) A standardized herbal extract mitigates tumor inflammation and augments chemotherapy effect of docetaxel in prostate cancer. Scientific Reports 2017 Nov; 7: 15624

Cheng-Hsun Ho* and Wolf B. Frommer (2016) Design and Functional Analysis of Fluorescent Nitrate and Peptide Transporter Acativity Sensors in Yeast Cultures Bio-protocol, vol 6, iss 3

Seasonal influenza viruses impact public health annually due to their continual evolution. However, the current inactivated seasonal vaccines provide poor protection against antigenically drifted viruses and require periodical reformulation through hit-and-miss predictions about which strains will circulate during the next season. To reduce the impact caused by vaccine mismatch, we investigated the drift-tolerance of virus-like particles (VLP) as an improved vaccine candidate. ...more
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