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Wang C, Li S, Zhao J, Yang H, Yin F, Ding M, Luo J, Wang X, Kong L. Design and SAR of Withangulatin A Analogues that Act as Covalent TrxR Inhibitors through the Michael Addition Reaction Showing Potential in Cancer Treatment. J Med Chem 2020; 63:11195-11214. [DOI: 10.1021/acs.jmedchem.0c01128] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Cheng Wang
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 210009, People’s Republic of China
| | - Shang Li
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 210009, People’s Republic of China
| | - Jinhua Zhao
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 210009, People’s Republic of China
| | - Huali Yang
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 210009, People’s Republic of China
| | - Fucheng Yin
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 210009, People’s Republic of China
| | - Ming Ding
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 210009, People’s Republic of China
| | - Jianguang Luo
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 210009, People’s Republic of China
| | - Xiaobing Wang
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 210009, People’s Republic of China
| | - Lingyi Kong
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 210009, People’s Republic of China
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Zhu T, Chen C, Wang S, Zhang Y, Zhu D, Li L, Luo J, Kong L. Cellular target identification of Withangulatin A using fluorescent analogues and subsequent chemical proteomics. Chem Commun (Camb) 2019; 55:8231-8234. [DOI: 10.1039/c9cc03653a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Find the target of Withangulatin A with the combination of fluorescent probes and chemical proteomics.
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Affiliation(s)
- Tianyu Zhu
- State Key Laboratory of Natural Medicines
- Department of Natural Medicinal Chemistry
- China Pharmaceutical University
- Nanjing 210009
- China
| | - Chen Chen
- State Key Laboratory of Natural Medicines
- Department of Natural Medicinal Chemistry
- China Pharmaceutical University
- Nanjing 210009
- China
| | - Sisi Wang
- State Key Laboratory of Natural Medicines
- Department of Natural Medicinal Chemistry
- China Pharmaceutical University
- Nanjing 210009
- China
| | - Yi Zhang
- State Key Laboratory of Natural Medicines
- Department of Natural Medicinal Chemistry
- China Pharmaceutical University
- Nanjing 210009
- China
| | - Dongrong Zhu
- State Key Laboratory of Natural Medicines
- Department of Natural Medicinal Chemistry
- China Pharmaceutical University
- Nanjing 210009
- China
| | - Lingnan Li
- State Key Laboratory of Natural Medicines
- Department of Natural Medicinal Chemistry
- China Pharmaceutical University
- Nanjing 210009
- China
| | - Jianguang Luo
- State Key Laboratory of Natural Medicines
- Department of Natural Medicinal Chemistry
- China Pharmaceutical University
- Nanjing 210009
- China
| | - Lingyi Kong
- State Key Laboratory of Natural Medicines
- Department of Natural Medicinal Chemistry
- China Pharmaceutical University
- Nanjing 210009
- China
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3
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Sun L, Liu J, Liu P, Yu Y, Ma L, Hu L. Immunosuppression effect of Withangulatin A from Physalis angulata via heme oxygenase 1-dependent pathways. Process Biochem 2011. [DOI: 10.1016/j.procbio.2010.09.022] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Sun L, Liu J, Cui D, Li J, Yu Y, Ma L, Hu L. Anti-inflammatory function of Withangulatin A by targeted inhibiting COX-2 expression via MAPK and NF-kappaB pathways. J Cell Biochem 2010; 109:532-41. [PMID: 19950196 DOI: 10.1002/jcb.22430] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Withangulatin A (WA), an active component isolated from Physalis angulata L., has been reported to possess anti-tumor and trypanocidal activities in model systems via multiple biochemical mechanisms. The aim of this study is to investigate its anti-inflammatory potential and the possible underlying mechanisms. In the current study, WA significantly suppressed mice T lymphocytes proliferation stimulated with LPS in a dose- and time-dependent manner and inhibited pro-inflammation cytokines (IL-2, IFN-gamma, and IL-6) dramatically. Moreover, WA targeted inhibited COX-2 expression mediated by MAPKs and NF-kappaB nuclear translocation pathways in mice T lymphocytes, and this result was further confirmed by the COX-1/2 luciferase reporter assay. Intriguingly, administration of WA inhibited the extent of mice ear swelling and decreased pro-inflammatory cytokines production in mice blood serum. Based on these evidences, WA influences the mice T lymphocytes function through targeted inhibiting COX-2 expression via MAPKs and NF-kappaB nuclear translocation signaling pathways, and this would make WA a strong candidate for further study as an anti-inflammatory agent.
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Affiliation(s)
- Lijuan Sun
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
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Lo CW, Chang YS, Chao CC, Chang MDT, Chang KC, Lai YK. Control mechanisms of differential translation of Hsp90 isoforms in 9L rat gliosarcoma cells. J Cell Biochem 2009; 107:418-27. [PMID: 19308988 DOI: 10.1002/jcb.22138] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Although the differential expression of heat shcok proteins, Hsp90alpha and Hsp90beta was extensively studied in many kinds of cells, the post-transcriptional regulation of Hsp90 isoforms remains unclear. In control and GA-treated rat gliosarcoma cells, it has been reported that the translational efficiency of hsp90alpha is higher than hsp90beta. In this study, we present evidences identifying the roles for leaky scanning and 5'-UTR sequence in translational regulation of Hsp90beta. The result of in vitro transcription and translation (IVTT) experiment showed that hsp90alpha exhibited higher translation efficiency than hsp90beta. Sequence analysis revealed that there is an out-of-frame downstream AUG codon in hsp90beta gene. However, elimination of the downstream AUG by site-directly mutagenesis or introducing Kozak context sequence around the initiator AUG of hsp90beta open reading frame increased its translational efficiency, which indicated that leaky scanning might be a possible mechanism regulating hsp90beta. Furthermore, we also constructed a firefly luciferase reporter system to verify the effect of subsequent translation at the downstream out-of-frame AUG codon in 9L and A549 cells. Furthermore, it is believed that 5'-untranslated region (5'-UTR) also plays a significant role in translational control. We showed hsp90beta 5'-UTR gives rise to the reduction of the translation efficiency in IVTT experiment. Additionally, the reductive effect of hsp90beta 5'-UTR was further confirmed by luciferase reporter assay using truncated deletion analyses of 5'-UTR of hsp90beta. Our results support the hypothesis that ribosome leaky scanning mechanism and 5'-UTR sequence acts as negative regulators in hsp90beta mRNA.
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Affiliation(s)
- Chih-Wei Lo
- Department of Life Science, Institute of Biotechnology, National Tsing Hua University, Hsinchu 30013, Taiwan, ROC
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Shu CW, Cheng NL, Chang WM, Tseng TL, Lai YK. Transactivation of hsp70-1/2 in geldanamycin-treated human non-small cell lung cancer H460 cells: involvement of intracellular calcium and protein kinase C. J Cell Biochem 2005; 94:1199-209. [PMID: 15696546 DOI: 10.1002/jcb.20348] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Geldanamycin is an antitumor drug that binds HSP90 and induces a wide range of heat shock proteins, including HSP70s. In this study we report that the induction of HSP70s is dose-dependent in geldanamycin-treated human non-small cell lung cancer H460 cells. Analysis of the induction of HSP70s specific isoform using LC-ESI-MS/MS analysis and Northern blotting showed that HSP70-1/2 are the major inducible forms under geldanamycin treatment. Transactivation of hsp70-1/2 was determined by electrophoretic mobility-shift assay using heat shock element (HSE) as a probe. The signaling pathway mediators involved in hsp70-1/2 transactivation were screened by the kinase inhibitor scanning technique. Pretreatment with serine/threonine protein kinase inhibitors H7 or H8 blocked geldanamycin-induced HSP70-1/2, whereas protein kinase A inhibitor HA1004, protein kinase G inhibitor KT5823, and myosin light chain kinase inhibitor ML-7 had no effect. Furthermore, the protein kinase C (PKC)-specific inhibitor Ro-31-8425 and the Ca2+-dependent PKC inhibitor Gö-6976 diminished geldanamycin-induced HSP70-1/2, suggesting an involvement of the PKC in the process. In addition, geldanamycin treatment causes a transient increase of intracellular Ca2+. Chelating intracellular Ca2+ with BAPTA-AM or depletion of intracellular Ca2+ store with A23187 or thapsigargin significantly decreased geldanamycin-transactivated HSP70-1/2 expression. Taken together, our results demonstrate that geldanamycin-induced specific HSP70-1/2 isoforms expression in H460 cells through signaling pathway mediated by Ca2+ and PKC.
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Affiliation(s)
- Chih-Wen Shu
- Department of Life Science and Institute of Biotechnology, National Tsing Hua University, Hsinchu, Taiwan, 300, Republic of China
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Cheng TJ, Lin YL, Chiang AS, Lai YK. Association of protein phosphatase 2A with its substrate vimentin intermediate filaments in 9L rat brain tumor cells. J Cell Biochem 2000. [DOI: 10.1002/1097-4644(2000)79:1<126::aid-jcb120>3.0.co;2-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Wang TT, Chiang AS, Chu JJ, Cheng TJ, Chen TM, Lai YK. Concomitant alterations in distribution of 70 kDa heat shock proteins, cytoskeleton and organelles in heat shocked 9L cells. Int J Biochem Cell Biol 1998; 30:745-59. [PMID: 9695029 DOI: 10.1016/s1357-2725(97)00133-7] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Maintenance of cell architecture and positioning of organelles are major functions of the cytoskeleton. On the other hand, induction of heat shock proteins (HSPs) and reorganization of the cytoskeleton are the most significant changes in heat-shocked mammalian cells. We examine the alterations in HSP70 and its constitutively expressed cognate, HSC70, as well as the cytoskeleton and organelles in 9L rat brain tumor cells upon heat shock. We employed fluorescence microscopy and scanning electron microscopy to follow these changes. Levels of HSP70s were quantified by Western blotting. Accumulation of HSC70 was more transient and the protein translocated to and subsequently exited from the nucleus more rapidly than HSP70. Changes in actin microfilaments include the nuclear localization of actin fraction and disappearance of cytoplasmic microfilament bundles, while the cortical actin microfilaments were almost unaffected. Furthermore, microtubules retracted slightly from the cell periphery but remained largely unchanged. In contrast, the intermediate filaments collapsed into the perinuclear region. The mitochondria converted from filamentous into granular forms and clustered in a region overlapping with the collapsed intermediate filaments. All of the above alterations are reversible and largely reverted after 8 h of recovery. The effect on Golgi organization was very transient and the apparatus assumed a normal appearance within 4 h after the heat treatment. The ER, on the other hand, was totally unaffected by the heat treatment. These observations help correlate the sequential events following a stress like heat shock and suggest possible physiological functions of these essential constituents of a cell under stress.
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Affiliation(s)
- T T Wang
- Department of Life Science, National Tsing Hua University, Hsinchu, Taiwan, Republic of China
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Vilaboa NE, García-Bermejo L, Pérez C, de Blas E, Calle C, Aller P. Heat-shock and cadmium chloride increase the vimentin mRNA and protein levels in U-937 human promonocytic cells. J Cell Sci 1997; 110 ( Pt 2):201-7. [PMID: 9044050 DOI: 10.1242/jcs.110.2.201] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Heat-shock for 2 hours at 42 degrees C, or the administration for 3 hours of 100 or 150 microM cadmium chloride, inhibited the subsequent proliferation activity, induced the expression of functional differentiation markers, and caused an increase in the amount of the stress-responsive HSP70 protein in U-937 human promonocytic cells. In addition, both heat and cadmium produced an increase in the amount of the intermediate filament protein vimentin, as determined by immunoblot and immunofluorescence assays. By contrast, the amounts of actin and beta-tubulin were not significantly altered. The amount of vimentin mRNA was also increased during recovery from stress, indicating that vimentin expression was not exclusively regulated at the protein level. Although cadmium caused an early, transient stimulation of c-jun and c-fos expression and AP-1 binding activity, heat-shock failed to alter both protooncogene expression and transcription factor binding, indicating that the stress-induced vimentin increase was not the result of AP-1-mediated transcriptional activation. Finally, it was observed that the rate of decay of vimentin mRNA upon actinomycin D administration was decreased in heat- and cadmium-pretreated cells in comparison to untreated cells. These results indicate that stress treatments cause an increase in vimentin levels in promonocytic cells, which may be explained at least in part by transcript stabilization.
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Affiliation(s)
- N E Vilaboa
- Centro de Investigaciones Biológicas, CSIC, Madrid, Spain
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Bousquet O, Basseville M, Vila-Porcile E, Billette de Villemeur T, Hauw JJ, Landrieu P, Portier MM. Aggregation of a subpopulation of vimentin filaments in cultured human skin fibroblasts derived from patients with giant axonal neuropathy. CELL MOTILITY AND THE CYTOSKELETON 1996; 33:115-29. [PMID: 8635201 DOI: 10.1002/(sici)1097-0169(1996)33:2<115::aid-cm4>3.0.co;2-b] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Giant axonal neuropathy (GAN) is a generalized disorder of intermediate filament networks which results in the formation of an ovoid aggregate in a large variety of cell types. We investigated the cytoskeletal organization of cultured skin fibroblasts derived from three GAN patients by indirect immunofluorescence, confocal, and electron microscopy. Whereas the organization of microfilaments seemed normal, the microtubule network appeared disorganized and tangled. The organization of the intermediate filament network, composed of vimentin, was probed with three antibodies directed against different epitopes: two vimentin-specific antibodies, a monoclonal antibody (mAb V9) and a polyclonal antibody, and a serum specific for all type III IFPs (PI serum). These experiments showed that 20% of cultured skin fibroblasts from GAN patients have a vimentin aggregate composed of densely packed filaments which coexists with a well-organized vimentin network. After depolymerization of microtubules with nocodazole, all fibroblasts from GAN patients contained a vimentin aggregate which seemed to arise from a subpopulation of vimentin filaments normally integrated in the vimentin network. Such aggregates were never observed in any condition in control fibroblasts. Moreover, the ultrastructural analysis of GAN cells revealed the presence of swollen mitochondria. We suggest that GAN may be due to a defect in a factor which stabilizes cytoplasmic intermediate filament networks, and we speculate on its identification and properties.
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Affiliation(s)
- O Bousquet
- Laboratoire de Biochimie Cellulaire, Collège de France, Paris
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Liao J, Lowthert LA, Ghori N, Omary MB. The 70-kDa heat shock proteins associate with glandular intermediate filaments in an ATP-dependent manner. J Biol Chem 1995; 270:915-22. [PMID: 7529764 DOI: 10.1074/jbc.270.2.915] [Citation(s) in RCA: 84] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Keratin polypeptides 8 and 18 (K8/18) are intermediate filament proteins expressed preferentially in glandular epithelia. We describe the identification, by co-immunoprecipitation from normal human colonic tissues and cultured cell lines, of the 70-kDa heat shock protein (hsp) and its related heat shock cognate protein as K8/18-associated proteins (hsp/c). The association is significant but sub-stoichiometric and occurs preferentially with the soluble rather than the cytoskeletal K8/18 fractions. Heat stress increases the level of soluble K8/18 in association with an increase in hsp70 levels and an increase in the stoichiometry of K8/18-hsp70 association. Identity of the associated proteins was confirmed by microsequencing of a tryptic digest of the purified associated protein and by using anti-hsp/c70-specific antibodies. The K8/18-hsp/c70 complex can be dissociated in a Mg-ATP-dependent manner that requires ATP hydrolysis. Binding of hsp to K8/18 can be reconstituted using purified bovine hsp70 and human K8/18 immunoprecipitates that have been depleted of bound hsp/c70 and increases slightly in the presence of ATP. The reconstituted K8/18-hsp70 complex can be again released in the presence of Mg-ATP. In addition, hsp70 binds to K8/18 without having a significant effect on in vitro filament assembly when added during or after assembly. Using an overlay assay, hsp70 binds exclusively to K8 in the presence of ATP. Our results show direct association of the hsp/c70 proteins with K8/18. This interaction may serve, at least in part, to regulate the function of these two abundant protein groups.
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Affiliation(s)
- J Liao
- Palo Alto Veterans Affairs Medical Center, California 94304
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Lee YC, Lai YK. Integrity of intermediate filaments is associated with the development of acquired thermotolerance in 9L rat brain tumor cells. J Cell Biochem 1995; 57:150-62. [PMID: 7721954 DOI: 10.1002/jcb.240570115] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Withangulatin A (WA), a newly discovered withanolide isolated from an antitumor Chinese herb, has been shown to be a vimentin intermediate filament-targeting drug by using immunofluorescence microscopy. Together with cytochalasin D and colchicine, these drugs were employed to investigate the importance of vimentin intermediate filaments, actin filaments, and microtubules in the development of acquired thermotolerance in 9L rat brain tumor cells treated at 45 degrees C for 15 min (priming heat-shock). Acquired thermotolerance was abrogated in cells incubated with WA before the priming heat-shock but it could be detected in cells treated with WA after the priming heat-shock. In contrast, cytochalasin D and colchicine do not interfere with the development of thermotolerance at all. The intracellular localizations of vimentin and the constitutive heat-shock protein70 (HSC70) in treated cells were examined by using immunofluorescence microscopy and detergent-extractability studies. In cells treated with WA before the priming heat-shock, vimentin IFs were tightly aggregated around the nucleus and unable to return to their normal organization after a recovery under normal growing conditions. In contrast, the IF network in cells treated with WA after the priming heat-shock was able to reorganize into filamentous form after a recovery period, a behavior similar to that of the cells treated with heat-shock only. HSC70 was found to be co-localized with vimentin during these changes. It is suggested that the integrity of intermediate filaments is important for the development of thermotolerance and that HSC70 may be involved in this process by stabilizing the intermediate filaments through direct or indirect binding.
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Affiliation(s)
- Y C Lee
- Institute of Life Science, National Tsing Hua University, Hsinchu, Taiwan, Republic of China
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