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Campos-Sánchez JC, Guardiola FA, Esteban MÁ. In vitro immune-depression and anti-inflammatory activities of cantharidin on gilthead seabream (Sparus aurata) leucocytes activated by λ-carrageenan. FISH & SHELLFISH IMMUNOLOGY 2024; 148:109470. [PMID: 38442766 DOI: 10.1016/j.fsi.2024.109470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2023] [Revised: 02/26/2024] [Accepted: 02/27/2024] [Indexed: 03/07/2024]
Abstract
Cantharidin is a natural compound with known therapeutic applications in humans. The aim of this study was to investigate the in vitro effects of cantharidin on gilthead seabream (Sparus aurata) head kidney leucocytes (HKL) stimulated with λ-carrageenan. HKLs were incubated for 24 h with cantharidin (0, 2.5 and 5 μg mL-1) and λ-carrageenan (0 and 1000 μg mL-1). The results showed that HKL viability only decreased by 15.2% after incubated with 5 μg mL-1 of cantharidin and λ-carrageenan. Cantharidin increased the peroxidase activity of HKLs only when incubated in combination with λ-carrageenan. Besides this, cantharidin inhibited the respiratory burst and phagocytic activities. Furthermore, cantharidin induced morphological changes in HKLs (apoptotic and vacuolization signs) that were enhanced when incubated with λ-carrageenan. Considering the analysis of the selected gene expression studied in HKLs [NF-κB subunits (rela, relb, crel, nfkb1, nfkb2), proinflammatory cytokines (il1b, tnfa), anti-inflammatory cytokines (il10, tgfb) and caspases (casp1, casp3, casp8, casp9)], although λ-carrageenan up-regulated the expression of the proinflammatory gene il1b, λ-carrageenan and cantharidin down-regulated its expression in HKLs. In addition, cantharidin up-regulated casp3 and casp9 expression. The casp3 and casp9 gene expression was down-regulated while casp1 gene expression was up-regulated in HKLs incubated with both cantharidin and λ-carrageenan. All the effects of cantharidin are related to its inhibitory effect on protein phosphatases, which induce apoptosis at long exposure times, and minimize the effects of λ-carrageenan. The present results provide detailed insight into the immune-depressive and anti-inflammatory properties of cantharidin on immune cells, which could be of interest to the aquaculture sector.
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Affiliation(s)
- Jose Carlos Campos-Sánchez
- Immunobiology for Aquaculture Group, Department of Cell Biology and Histology Faculty of Biology, Campus Regional de Excelencia Internacional "Campus Mare Nostrum", University of Murcia, 30100, Murcia, Spain
| | - Francisco A Guardiola
- Immunobiology for Aquaculture Group, Department of Cell Biology and Histology Faculty of Biology, Campus Regional de Excelencia Internacional "Campus Mare Nostrum", University of Murcia, 30100, Murcia, Spain
| | - María Ángeles Esteban
- Immunobiology for Aquaculture Group, Department of Cell Biology and Histology Faculty of Biology, Campus Regional de Excelencia Internacional "Campus Mare Nostrum", University of Murcia, 30100, Murcia, Spain.
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2
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Wu Y, Liu Z, He Z, Yi J, Qiao X, Tan C, Xing Y, Zeng Y, Yang D, Yin J, Fan B, Zeng G. Cantharidin analogue alleviates dextran sulfate sodium-induced colitis in mice by inhibiting the activation of NF-κB signaling. Eur J Med Chem 2023; 260:115731. [PMID: 37643546 DOI: 10.1016/j.ejmech.2023.115731] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2023] [Revised: 07/28/2023] [Accepted: 08/14/2023] [Indexed: 08/31/2023]
Abstract
Ulcerative colitis is a chronic inflammatory disease with a remitting-relapsing clinical course, it has evolved into a global burden given its high incidence worldwide. Cantharidin (CTD) derivatives are a class of compounds whose structures characterized with a 7-oxabicyclo [2.2.1]heptane core. Though potent cytotoxicity CTD and its derivatives showed, their clinical usage as anti-cancer drugs was limited by the toxicity in organs. In order to find new CTD analogues with good activity and lower toxicity, 21 CTD analogues with or without alkynyl substitution at C5 position of 7-oxabicyclo [2.2.1]heptane core were synthesized, some compounds showed better in vitro anti-inflammatory activity compared to CTD and norcantharidin (NCTD). Based on the structure-activity relationship results of in vitro experiment, analogue 3i was chosen for further study. Results from the acute toxicity in mice showed that 3i was hypotoxic with the single-dose MTD (maximum tolerated dose) for oral administration is over 1852 mg/kg, at least 35-fold lower than that of NCTD. Mechanism study indicated that 3i could potently inhibit TNF-α induced activation of NF-κB signaling by down-regulation the expression levels of phosphor- IKK, IκBα, and NF-κB p65, and alleviated dextran sulfate sodium-induced colitis in mice. This study indicated that CTD analogues with alkynyl substitution at C5 position of 7-oxabicyclo [2.2.1]heptane core is a kind of new compounds with good anti-inflammatory activity and lower toxicity in vivo, and might be used as therapeutic agents for inflammatory diseases.
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Affiliation(s)
- Yihang Wu
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, State Ethnic Affairs Commission and Ministry of Education, Yunnan Minzu University, Kunming 650504, China
| | - Zixiu Liu
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, State Ethnic Affairs Commission and Ministry of Education, Yunnan Minzu University, Kunming 650504, China
| | - Zhenxiu He
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, State Ethnic Affairs Commission and Ministry of Education, Yunnan Minzu University, Kunming 650504, China
| | - Jumei Yi
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, State Ethnic Affairs Commission and Ministry of Education, Yunnan Minzu University, Kunming 650504, China
| | - Xingfang Qiao
- Chongqing Key Laboratory of Traditional Chinese Medicine Health, Chongqing Academy of Chinese Materia Medica, Chongqing 400065, China
| | - Chunbin Tan
- Chongqing Key Laboratory of Traditional Chinese Medicine Health, Chongqing Academy of Chinese Materia Medica, Chongqing 400065, China
| | - Yajing Xing
- Chongqing Key Laboratory of Traditional Chinese Medicine Health, Chongqing Academy of Chinese Materia Medica, Chongqing 400065, China
| | - Yaobo Zeng
- Chongqing Key Laboratory of Traditional Chinese Medicine Health, Chongqing Academy of Chinese Materia Medica, Chongqing 400065, China
| | - Dajian Yang
- Chongqing Key Laboratory of Traditional Chinese Medicine Health, Chongqing Academy of Chinese Materia Medica, Chongqing 400065, China.
| | - Junlin Yin
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, State Ethnic Affairs Commission and Ministry of Education, Yunnan Minzu University, Kunming 650504, China
| | - Baomin Fan
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, State Ethnic Affairs Commission and Ministry of Education, Yunnan Minzu University, Kunming 650504, China.
| | - Guangzhi Zeng
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, State Ethnic Affairs Commission and Ministry of Education, Yunnan Minzu University, Kunming 650504, China.
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3
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Jin D, Huang NN, Wei JX. Hepatotoxic mechanism of cantharidin: insights and strategies for therapeutic intervention. Front Pharmacol 2023; 14:1201404. [PMID: 37383714 PMCID: PMC10293652 DOI: 10.3389/fphar.2023.1201404] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Accepted: 06/01/2023] [Indexed: 06/30/2023] Open
Abstract
Cantharidin (CTD), a natural compound derived from Mylabris, is widely used in traditional Oriental medicine for its potent anticancer properties. However, its clinical application is restricted due to its high toxicity, particularly towards the liver. This review provides a concise understanding of the hepatotoxic mechanisms of CTD and highlights novel therapeutic strategies to mitigate its toxicity while enhancing its anticancer efficacy. We systematically explore the molecular mechanisms underlying CTD-induced hepatotoxicity, focusing on the involvement of apoptotic and autophagic processes in hepatocyte injury. We further discuss the endogenous and exogenous pathways implicated in CTD-induced liver damage and potential therapeutic targets. This review also summarizes the structural modifications of CTD derivatives and their impact on anticancer activity. Additionally, we delve into the advancements in nanoparticle-based drug delivery systems that hold promise in overcoming the limitations of CTD derivatives. By offering valuable insights into the hepatotoxic mechanisms of CTD and outlining potential avenues for future research, this review contributes to the ongoing efforts to develop safer and more effective CTD-based therapies.
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Affiliation(s)
- Dian Jin
- Department of Pharmacy, Sixth People’s Hospital of Chengdu, Chengdu, China
| | - Na-Na Huang
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Jing-Xia Wei
- Department of Pharmacy, Sixth People’s Hospital of Chengdu, Chengdu, China
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Kuang H, Wang P, Wang Y, Li J, Yu J, Jia L, Li S, Ma Y, Liu H, He Z, Wang Y. Liposomal Nanodrug Based on Norcantharidin Derivative for Increased in Vivo Activity. AAPS PharmSciTech 2023; 24:118. [PMID: 37165275 DOI: 10.1208/s12249-023-02572-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2023] [Accepted: 04/19/2023] [Indexed: 05/12/2023] Open
Abstract
To address the limitations of norcantharidin (NCTD) in clinical applications, including restricted tumor accumulation and intense irritation, we have developed a new derivative of NCTD with (S)-1-benzyl-3-pyrrolidinol, which can be actively loaded into liposomes to achieve drug encapsulation and sustained release properties by using pH gradient loading technique. Cytotoxicity tests against cancer cell lines (Hepa 1-6 and 4 T1 cells) have demonstrated that this derivative exhibits comparable activity to NCTD in vitro. The NCTD derivative can be efficiently loaded into liposomes with high encapsulation efficiency (98.7%) and high drug loading (32.86%). Tolerability and antitumor efficacy studies showed that the liposomal NCTD derivative was well tolerated at intravenous injection doses of 3 folds higher than the parent drug solution, while significantly improved anticancer activity in vivo was achieved. This liposomal nanodrug could become a potent and safe NCTD formulation alternative for cancer therapy.
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Affiliation(s)
- Hailong Kuang
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang, 110016, China
| | - Peipei Wang
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang, 110016, China
| | - Yuhang Wang
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang, 110016, China
| | - Jinbo Li
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang, 110016, China
| | - Jiang Yu
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang, 110016, China
| | - Lirui Jia
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang, 110016, China
| | - Shuo Li
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang, 110016, China
| | - Yan Ma
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Hongzhuo Liu
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang, 110016, China
| | - Zhonggui He
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang, 110016, China.
| | - Yongjun Wang
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang, 110016, China.
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He T, Xiong L, Zhang Y, Yan R, Yu M, Liu M, Liu L, Duan C, Li X, Zhang J. Mice kidney biometabolic process analysis after cantharidin exposure using widely-targeted metabolomics combined with network pharmacology. Food Chem Toxicol 2022; 171:113541. [PMID: 36464109 DOI: 10.1016/j.fct.2022.113541] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Revised: 11/01/2022] [Accepted: 11/27/2022] [Indexed: 12/05/2022]
Abstract
Cantharidin (CTD) is a principal bioactive component of traditional Chinese medicine Mylabris used in cancer treatment. However, CTD clinical application is limited due to nephrotoxicity, and the mechanism is unknown. The present study used widely-targeted metabolomics, network pharmacology, and cell experiments to investigate the nephrotoxicity mechanism after CTD exposure. In mice exposed to CTD, serum creatinine and urea nitrogen levels increased with renal injury. Then, 74 differential metabolites were detected, including 51 up-regulated and 23 down-regulated metabolites classified as amino acids, small peptides, fatty acyl, arachidonic acid metabolite, organic acid, and nucleotides. Sixteen metabolic pathways including tyrosine, sulfur, and pyrimidine metabolism were all disrupted in the kidney. Furthermore, network pharmacology revealed that 258 metabolic targets, and pathway enrichment indicated that CTD could activate oxidative phosphorylation and oxidative stress (OS). Subsequently, HK-2 cell experiments demonstrated that CTD could reduce superoxide dismutase while increasing malondialdehyde levels. In conclusion, after CTD exposure, biometabolic processes may be disrupted with renal injury in mice, resulting in oxidative phosphorylation and OS.
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Affiliation(s)
- Tianmu He
- School of Basic Medicine, Guizhou Medical University, Guiyang, 550025, China; School of Basic Medicine, Zunyi Medical University, Zunyi, 563000, China
| | - Lijuan Xiong
- School of Pharmacy and Key Laboratory of Basic Pharmacology Ministry Education, Joint International Research Laboratory of Ethnomedicine Ministry of Education, Zunyi Medical University, Zunyi, 563000, China
| | - Yixin Zhang
- School of Basic Medicine, Zunyi Medical University, Zunyi, 563000, China
| | - Rong Yan
- School of Basic Medicine, Zunyi Medical University, Zunyi, 563000, China
| | - Ming Yu
- School of Pharmacy and Key Laboratory of Basic Pharmacology Ministry Education, Joint International Research Laboratory of Ethnomedicine Ministry of Education, Zunyi Medical University, Zunyi, 563000, China
| | - Meichen Liu
- School of Basic Medicine, Zunyi Medical University, Zunyi, 563000, China
| | - Liu Liu
- School of Basic Medicine, Zunyi Medical University, Zunyi, 563000, China
| | - Cancan Duan
- School of Pharmacy and Key Laboratory of Basic Pharmacology Ministry Education, Joint International Research Laboratory of Ethnomedicine Ministry of Education, Zunyi Medical University, Zunyi, 563000, China
| | - Xiaofei Li
- School of Basic Medicine, Guizhou Medical University, Guiyang, 550025, China; School of Basic Medicine, Zunyi Medical University, Zunyi, 563000, China.
| | - Jianyong Zhang
- School of Pharmacy and Key Laboratory of Basic Pharmacology Ministry Education, Joint International Research Laboratory of Ethnomedicine Ministry of Education, Zunyi Medical University, Zunyi, 563000, China.
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Campos-Sánchez JC, Guardiola FA, Esteban MÁ. In vitro effects of cantharidin on gilthead seabream (Sparus aurata) head-kidney leucocytes. FISH & SHELLFISH IMMUNOLOGY 2022; 123:20-35. [PMID: 35218974 DOI: 10.1016/j.fsi.2022.02.045] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2021] [Revised: 12/30/2021] [Accepted: 02/21/2022] [Indexed: 06/14/2023]
Abstract
Cantharidin is a toxic vesicant terpene used in folk and traditional medicine due to its various therapeutic effects. Since there are no previous data on the effect of cantharidin in fish, this study aimed to investigate the in vitro related-inflammatory effects of cantharidin in gilthead seabream (Sparus aurata L.) head-kidney leucocytes (HKLs). In the first experiment, the HKLs were incubated with 0, 5 and 10 μg mL-1 of cantharidin for 24 h to delimit its possible toxic effects. In a second experiment, leucocytes were incubated with ranging concentrations from 0 to 10 μg mL-1 for 3, 6, or 12 h. Cell viability was higher in acidophilic granulocytes than in monocytes/macrophages and lymphocytes. Cantharidin caused apoptosis as was evidenced by transmission electron microscopy. In addition, cantharidin produced a time- and dose-dependent decrease of respiratory burst and phagocytic activities in HKLs, while their peroxidase activity was increased at 24 h of incubation with 5 and 10 μg mL-1 of cantharidin. Different changes in the gene expression were observed after incubation with cantharidin. While the gene expression of tnfa, il1b and crel was up-regulated in HKLs, the nfkb1 and igmh genes were down-regulated in comparison to the expression found in control HKLs. Present results offer a first view of the possible effects and action mechanisms of cantharidin in HKLs, as well as its implication in the inflammatory process, which could be of interest not only for basic research but also in the aquaculture sector.
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Affiliation(s)
- José Carlos Campos-Sánchez
- Immunobiology for Aquaculture Group, Department of Cell Biology and Histology. Faculty of Biology, Campus Regional de Excelencia Internacional "Campus Mare Nostrum", University of Murcia, 30100, Murcia, Spain
| | - Francisco A Guardiola
- Immunobiology for Aquaculture Group, Department of Cell Biology and Histology. Faculty of Biology, Campus Regional de Excelencia Internacional "Campus Mare Nostrum", University of Murcia, 30100, Murcia, Spain
| | - María Ángeles Esteban
- Immunobiology for Aquaculture Group, Department of Cell Biology and Histology. Faculty of Biology, Campus Regional de Excelencia Internacional "Campus Mare Nostrum", University of Murcia, 30100, Murcia, Spain.
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Synthesis and bioactivity evaluation of 5,6-epoxynorcantharidin mono-amide and imide derivatives. MONATSHEFTE FUR CHEMIE 2022. [DOI: 10.1007/s00706-022-02905-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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8
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Norcantharidin induces G2/M arrest and apoptosis via activation of ERK and JNK, but not p38 signaling in human renal cell carcinoma ACHN cells. ACTA PHARMACEUTICA (ZAGREB, CROATIA) 2021; 71:267-278. [PMID: 33151174 DOI: 10.2478/acph-2021-0012] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 04/15/2020] [Indexed: 01/19/2023]
Abstract
Renal cell carcinoma (RCC) is generally acknowledged as the most resistant primary malignancy unresponsive to conventional radiotherapy and chemotherapy treatments. Norcantharidin (NCTD), a therapeutic compound derived from medicinal plants, has been shown to trigger apoptosis, as well as antimetastatic and antioxidant activities in several tumor cells. However, NCTD's mechanism of antitumor activity in the RCC cell line remains unclear. In this study, we report that NCTD led to a time- and dose-dependent inhibition of cell proliferation. It had also markedly induced apoptosis and G2/M phase cell cycle arrest in a dose-dependent manner by decreasing the expressions of pro-caspase-3, pro-caspase-9, cyclin B1, and pCDC25C while increasing active caspase-3, cleaved-PARP, P21, and pCDC2 levels. Interestingly, NCTD treatment provoked the phosphorylation of extracellular-regulated protein kinase (ERK) and c-Jun-N-terminal kinase (JNK), but not of p38 MAPK. Moreover, SCH772984 and SP600125, ERK and JNK inhibitors, respectively, could partially abolish NCTD-induced apoptosis and G2/M phase cell cycle arrest. Collectively, these findings suggest that NCTD might activate JNK and ERK signaling pathways, consequently inducing apoptosis and G2/M arrest through the modulation of related proteins. This study provided evidence that NCTD is a promising therapeutic drug for the treatment of RCC.
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Lawrenson SB, Pearce AK, Hart S, Whitwood AC, O’Reilly RK, North M. Synthesis of cytotoxic spirocyclic imides from a biomass-derived oxanorbornene. Tetrahedron 2021. [DOI: 10.1016/j.tet.2020.131754] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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He T, Liu J, Wang X, Duan C, Li X, Zhang J. Analysis of cantharidin-induced nephrotoxicity in HK-2 cells using untargeted metabolomics and an integrative network pharmacology analysis. Food Chem Toxicol 2020; 146:111845. [DOI: 10.1016/j.fct.2020.111845] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 10/27/2020] [Accepted: 10/30/2020] [Indexed: 02/08/2023]
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Shao H, Dong L, Feng Y, Wang C, Tong H. The protective effect of L-glutamine against acute Cantharidin-induced Cardiotoxicity in the mice. BMC Pharmacol Toxicol 2020; 21:71. [PMID: 33004081 PMCID: PMC7528483 DOI: 10.1186/s40360-020-00449-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Accepted: 09/22/2020] [Indexed: 01/19/2023] Open
Abstract
Background Cantharidin (CTD) is a compound which have the potential to be exploited as an antitumor drug, and it has been demonstrated antitumor effects in a variety of cancers. However, the use is limited due to its severe toxicity. It has reported that it can induce fatal cardiac arrhythmias. Fortunately, we found that L-glutamine can alleviate cardiac toxicity caused by cantharidin in mice. Methods To investigate the protective effect of L-glutamine, we used a high dose of cantharidin in mice to create a model of cardiotoxicity. In the experimental mice, glutamine was given orally half an hour before they were administrated with cantharidin. The mice of control group were intraperitoneally injected with DMSO solution. The general state of all mice, cardiac mass index, electrocardiogram change and biological markers were determined. Hematoxylin-eosin staining (HE staining) of heart tissue was carried out in each group to reflect the protective effect of glutamine. To investigate the mechanisms underlying the injury and cardio-protection, multiple oxidative stress indexes were determined and succinate dehydrogenase activity was evaluated. Result The results showed that L-glutamine (Gln) pretreatment reduced weight loss and mortality. It also decreased the biological markers (p < 0.05), improved electrocardiogram and histological changes that CTD induced cardiotoxicity in mice. Subsequently, the group pretreated with L-glutamine before CTD treatment increases in MDA but decreases in SOD and GSH, in comparison to the group treated with CTD alone. Besides, succinate dehydrogenase activity also was improved when L-glutamine was administrated before cantharidin compared to cantharidin. Conclusions This study provided evidence that L-glutamine could protect cardiac cells against the acute cantharidin-induced cardiotoxicity and the protective mechanism of glutamine may be related to the myocardial cell membrane or the tricarboxylic acid cycle in the mitochondria.
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Affiliation(s)
- Haozhen Shao
- Institute of Basic Theory for Chinese Medicine, China Academy of Chinese Medical Sciences, Beijing, 100700, China.,School of Life Sciences, Beijing University of Chinese Medicine, Beijing, 10029, China
| | - Lei Dong
- School of Life Sciences, Beijing University of Chinese Medicine, Beijing, 10029, China
| | - Yanyan Feng
- School of Life Sciences, Beijing University of Chinese Medicine, Beijing, 10029, China
| | - Chunhui Wang
- Fangshan Hospital of Beijing University of Chinese Medicine, Beijing, 102400, China.
| | - Hongxuan Tong
- Institute of Basic Theory for Chinese Medicine, China Academy of Chinese Medical Sciences, Beijing, 100700, China. .,School of Life Sciences, Beijing University of Chinese Medicine, Beijing, 10029, China.
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12
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Norcantharidin: research advances in pharmaceutical activities and derivatives in recent years. Biomed Pharmacother 2020; 131:110755. [PMID: 33152920 DOI: 10.1016/j.biopha.2020.110755] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Revised: 09/08/2020] [Accepted: 09/10/2020] [Indexed: 12/20/2022] Open
Abstract
Cantharidin (CTD) is the main bioactive component of Cantharides, which is called Banmao in Traditional Chinese Medicine (TCM). Norcantharidin (NCTD) is a structural modifier of CTD. To compare with CTD, NCTD has lighter side effects and stronger bioactivity in anti-cancer through inhibiting cell proliferation, causing apoptosis and autophagy, overwhelming migration and metastasis, affecting immunity as well as lymphangiogenesis. Examples of these effects include suppressing Protein Phosphatase 2A and modulating Wnt/beta catenin signal, with Caspase family proteins, AMPK pathway and c-Met/EGFR pathway involving respectively. Moreover, NCTD has the effects of immune enhancement, anti-platelet aggregation and inhibition of renal interstitial fibrosis with distinct signaling pathways. The immunological effects induced by NCTD are related to the regulation of macrophage polarization and LPS-mediated immune response. The antiplatelet activity that NCTD induced is relevant to the inhibition of platelet signaling and the downregulation of α2 integrin. Furthermore, some of novel derivatives designed and synthesized artificially show stronger biological activities (e.g., anticancer effect, enzyme inhibition effect, antioxidant effect) and lower toxicity than NCTD itself. Plenty of literatures have reported various pharmacological effects of NCTD, particularly the anticancer effect, which has been widely concerned in clinical application and laboratory research. In this review, the pharmaceutical activities and derivatives of NCTD are discussed, which can be reference for further study.
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Özkan H, Adem Ş. Synthesis, Spectroscopic Characterizations of Novel Norcantharimides, Their ADME Properties and Docking Studies Against COVID-19 M pr°. ChemistrySelect 2020; 5:5422-5428. [PMID: 32518817 PMCID: PMC7272884 DOI: 10.1002/slct.202001123] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Accepted: 04/27/2020] [Indexed: 01/05/2023]
Abstract
A series of novel Norcantharimide derivatives were synthesized and their structures were characterized by FTIR, 1H and 13C NMR spectroscopy as well as elemental analyses. The absorption, distribution, metabolism and excretion (ADME) properties of the synthesized molecules were investigated. The results obtained in silico demonstrated that these molecules can be considered as orally active drug candidates due to their physicochemical properties. Also, docking studies demonstrated that all derivatives exhibit a good theoretical affinity with MolDock Score in between 124-138 against the main protease of Coronavirus Disease 2019 (COVID-19 Mpr°) that caused worldwide epidemics. We believe that newly synthesized norcantharimide derivatives can guide many future studies in organic synthesis, medicine and pharmaceutical applications.
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Affiliation(s)
- Hamdi Özkan
- Department of Chemistry, Faculty of ScienceGazi University06500AnkaraTurkey
| | - Şevki Adem
- Department of Chemistry, Faculty of ScienceÇankırı Karatekin University18100ÇankırıTurkey
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14
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Ye K, Wei QY, Long TX, He HG, Huang YF, Xiong LJ, Lan J, Huang YY, Gong ZF, Peng XM, Wu QX. Norcantharidin Enhances High Concentrations of Fetal Bovine Serum-Induced Apoptosis in Human Mesangial Cells by Regulating the Mitogen-Activated Protein Kinase Signaling Pathway. Kidney Blood Press Res 2019; 44:1339-1351. [PMID: 31661692 DOI: 10.1159/000502524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Accepted: 08/06/2019] [Indexed: 11/19/2022] Open
Abstract
AIM This study aimed to investigate the effect of norcantharidin (NCTD) on human mesangial cells (HMCs) apoptosis in vitro and further examine its molecular mechanism. METHODS HMCs were divided into 5 groups: control group, 25% fetal bovine serum (FBS)-treated group, and NCTD groups (NCTD [2.5, 5 and 10 µg/mL] + 25% FBS, respectively). Cell proliferation was determined by MTT assay, while apoptosis was evaluated by Hoechest 33258 staining, the level of cytochrome c, immunohistochemistry, and apoptotic-related proteins/gene expression. RESULTS Cell viability was inhibited in NCTD-treated HMCs in a dose-dependent manner. The number of apoptotic cells and the content of cytochrome c were significantly increased by NCTD treatment but that of mitochondrial membrane was decreased. Moreover, the expression of bcl-2 and caspase-3 was prompted by NCTD, but the expression of bax, MMP-2, and MMP-9 in 25% FBS-treated HMCs was inhibited. In addition, NCTD markedly unregulated the expression of apoptosis-related gene/protein, including p-Erk1/2, phosphorylated-Jun N-terminal kinase (JNK), p-p38, and p53. CONCLUSION NCTD enhances 25% FBS-treated HMC apoptosis in vitro, and this effect may be attributed to the modulation of the ERK, JNK, and p38 mitogen-activated protein kinase signaling pathways.
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Affiliation(s)
- Kun Ye
- Department of Nephrology, The People's Hospital of Guangxi Zhuang Autonomous Region, Qingxiu, China
| | - Qiao-Yu Wei
- Department of Nephrology, The People's Hospital of Guangxi Zhuang Autonomous Region, Qingxiu, China
| | - Teng-Xiang Long
- Department of Sci-Tech Novelty Retrieval, Guangxi Medical Information Institute, Qingxiu, China
| | - Hong-Guang He
- Department of Nephrology, The People's Hospital of Guangxi Zhuang Autonomous Region, Qingxiu, China
| | - Yun-Feng Huang
- Department of Nephrology, The People's Hospital of Guangxi Zhuang Autonomous Region, Qingxiu, China
| | - Li-Jia Xiong
- Department of Nephrology, The People's Hospital of Guangxi Zhuang Autonomous Region, Qingxiu, China
| | - Jiao Lan
- Department of Nephrology, The People's Hospital of Guangxi Zhuang Autonomous Region, Qingxiu, China
| | - Yi-Yun Huang
- Department of Nephrology, The People's Hospital of Guangxi Zhuang Autonomous Region, Qingxiu, China
| | - Zhi-Feng Gong
- Department of Nephrology, The People's Hospital of Guangxi Zhuang Autonomous Region, Qingxiu, China
| | - Xiao-Mei Peng
- Department of Nephrology, The People's Hospital of Guangxi Zhuang Autonomous Region, Qingxiu, China,
| | - Qiu-Xia Wu
- Department of Nephrology, The People's Hospital of Guangxi Zhuang Autonomous Region, Qingxiu, China
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Xiao H, Liao Y, Tang C, Xiao Z, Luo H, Li J, Liu H, Sun L, Zeng D, Li Y. RNA‐Seq analysis of potential lncRNAs and genes for the anti‐renal fibrotic effect of norcantharidin. J Cell Biochem 2019; 120:17354-17367. [PMID: 31104327 DOI: 10.1002/jcb.28999] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Revised: 04/02/2019] [Accepted: 04/08/2019] [Indexed: 12/15/2022]
Affiliation(s)
- Hengting Xiao
- Department of Nephrology The Second Xiangya Hospital of Central South University and Blood Purification Changsha China
- Hunan Key Laboratory of Kidney Disease and Blood Purification The Second Xiangya Hospital, Central South University Changsha China
| | - Yingjun Liao
- Department of Nephrology The Second Xiangya Hospital of Central South University and Blood Purification Changsha China
- Hunan Key Laboratory of Kidney Disease and Blood Purification The Second Xiangya Hospital, Central South University Changsha China
| | - Chengyuan Tang
- Department of Nephrology The Second Xiangya Hospital of Central South University and Blood Purification Changsha China
- Hunan Key Laboratory of Kidney Disease and Blood Purification The Second Xiangya Hospital, Central South University Changsha China
| | - Zheng Xiao
- Department of Nephrology The Second Xiangya Hospital of Central South University and Blood Purification Changsha China
- Hunan Key Laboratory of Kidney Disease and Blood Purification The Second Xiangya Hospital, Central South University Changsha China
| | - Hanwen Luo
- Department of Nephrology The Second Xiangya Hospital of Central South University and Blood Purification Changsha China
- Hunan Key Laboratory of Kidney Disease and Blood Purification The Second Xiangya Hospital, Central South University Changsha China
| | - Jun Li
- Department of Nephrology The Second Xiangya Hospital of Central South University and Blood Purification Changsha China
- Hunan Key Laboratory of Kidney Disease and Blood Purification The Second Xiangya Hospital, Central South University Changsha China
| | - Hong Liu
- Department of Nephrology The Second Xiangya Hospital of Central South University and Blood Purification Changsha China
- Hunan Key Laboratory of Kidney Disease and Blood Purification The Second Xiangya Hospital, Central South University Changsha China
| | - Lin Sun
- Department of Nephrology The Second Xiangya Hospital of Central South University and Blood Purification Changsha China
- Hunan Key Laboratory of Kidney Disease and Blood Purification The Second Xiangya Hospital, Central South University Changsha China
| | - Dong Zeng
- Department of Nephrology The Second Xiangya Hospital of Central South University and Blood Purification Changsha China
- Hunan Key Laboratory of Kidney Disease and Blood Purification The Second Xiangya Hospital, Central South University Changsha China
| | - Ying Li
- Department of Nephrology The Second Xiangya Hospital of Central South University and Blood Purification Changsha China
- Hunan Key Laboratory of Kidney Disease and Blood Purification The Second Xiangya Hospital, Central South University Changsha China
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Hizartzidis L, Gilbert J, Gordon CP, Sakoff JA, McCluskey A. Synthesis and Cytotoxicity of Octahydroepoxyisoindole‐7‐carboxylic Acids and Norcantharidin–Amide Hybrids as Norcantharidin Analogues. ChemMedChem 2019; 14:1152-1161. [DOI: 10.1002/cmdc.201900180] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Indexed: 01/17/2023]
Affiliation(s)
- Lacey Hizartzidis
- Chemistry, School of Environmental & Life Sciences The University of Newcastle 1 University Drive Callaghan NSW 2308 Australia
| | - Jayne Gilbert
- Experimental Therapeutics Group, Department of Medical Oncology Calvary Mater Hospital Edith Street Waratah NSW 2298 Australia
| | - Christopher P. Gordon
- Chemistry, School of Environmental & Life Sciences The University of Newcastle 1 University Drive Callaghan NSW 2308 Australia
- Present address: Department: School of Science and Health Western Sydney University Locked Bag 1797 Penrith South DC NSW 2750 Australia
| | - Jennette A. Sakoff
- Experimental Therapeutics Group, Department of Medical Oncology Calvary Mater Hospital Edith Street Waratah NSW 2298 Australia
| | - Adam McCluskey
- Chemistry, School of Environmental & Life Sciences The University of Newcastle 1 University Drive Callaghan NSW 2308 Australia
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17
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Wu MH, Chiou HL, Lin CL, Lin CY, Yang SF, Hsieh YH. Induction of endoplasmic reticulum stress and mitochondrial dysfunction dependent apoptosis signaling pathway in human renal cancer cells by norcantharidin. Oncotarget 2017; 9:4787-4797. [PMID: 29435141 PMCID: PMC5797012 DOI: 10.18632/oncotarget.23465] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Accepted: 11/16/2017] [Indexed: 11/25/2022] Open
Abstract
Previous studies reported that norcantharidin (NCTD) has anti-tumor effects. We investigated the antitumor effects and underlying mechanism of NCTD on human renal cancer in vitro and in vivo. NCTD significantly decreased renal cancer cell viability by induction of apoptosis, as determined by the MTT assay and annexin V/PI staining. NCTD treatment of 786-O and A-498 cells altered the expression of caspase family proteins and PARP. Moreover, NCTD induced mitochondrial depolarization, which was accompanied by an increased level of Bax and decreased levels of Bcl-2 and Mcl-1. NCTD induced endoplasmic reticulum (ER) stress by increasing the expression of Grp78, p-elF2α, ATF4, and CHOP. Pretreatment with an ER stress inhibitor (salubrinal) significantly attenuated the effect of NCTD. NCTD also induced activation of the AKT pathway in 786-O and A-498 cells. Overexpression of AKT partly reversed the effect of NCTD on apoptosis. NCTD treatment led to decreased expression of Bcl-2 and Mcl-1, and increased expression of Bax, cleaved-caspase-9, cleaved-PARP, and p-elF2α. Our in vivo studies demonstrated that NCTD significantly inhibited tumor growth in a nude mouse xenograft model. Taken together, our results suggest that NCTD is a potential anti-tumor agent for treatment of renal carcinoma.
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Affiliation(s)
- Min-Hua Wu
- Institute of Medicine, Chung Shan Medical University, Taichung, Taiwan.,Department of Laboratory, Chung-Kang Branch, Cheng-Ching General Hospital, Taichung, Taiwan
| | - Hui-Ling Chiou
- School of Medical Laboratory and Biotechnology, Chung Shan Medical University, Taichung, Taiwan
| | - Chu-Liang Lin
- Institute of Biochemistry, Microbiology and Immunology, Chung Shan Medical University, Taichung, Taiwan
| | - Ching-Yi Lin
- Division Of Chest Medicine, Department of Internal Medicine, Taichung Veterans General Hospital, Taichung, Taiwan
| | - Shun-Fa Yang
- Institute of Medicine, Chung Shan Medical University, Taichung, Taiwan.,Department of Medical Research, Chung Shan Medical University Hospital, Taichung, Taiwan
| | - Yi-Hsien Hsieh
- Institute of Biochemistry, Microbiology and Immunology, Chung Shan Medical University, Taichung, Taiwan.,Department of Biochemistry, School of Medicine, Chung Shan Medical University, Taichung, Taiwan.,Clinical Laboratory, Chung Shan Medical University Hospital, Taichung, Taiwan
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18
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Wang W, Deng L, Hu C, Zhang Y, Li Y, Zuo S. Synthesis of Isoxazole‐Linked Norcantharidin Analogues of Substituted Chromones. J Heterocycl Chem 2016. [DOI: 10.1002/jhet.2767] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Wei Wang
- Chemistry and Chemical Engineering InstituteShaoxing University Shaoxing 312000 People's Republic of China
- Zhejiang Supor Pharmaceuticals Shaoxing 312000 People's Republic of China
| | - Liping Deng
- Chemistry and Chemical Engineering InstituteShaoxing University Shaoxing 312000 People's Republic of China
- Zhejiang Supor Pharmaceuticals Shaoxing 312000 People's Republic of China
| | - Chunqi Hu
- Chemistry and Chemical Engineering InstituteShaoxing University Shaoxing 312000 People's Republic of China
| | - Yaohong Zhang
- Chemistry and Chemical Engineering InstituteShaoxing University Shaoxing 312000 People's Republic of China
| | - Yan Li
- Chemistry and Chemical Engineering InstituteShaoxing University Shaoxing 312000 People's Republic of China
| | - Shufeng Zuo
- Chemistry and Chemical Engineering InstituteShaoxing University Shaoxing 312000 People's Republic of China
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Chang MC, Wu JY, Liao HF, Chen YJ, Kuo CD. Comparative assessment of therapeutic safety of norcantharidin, N-farnesyloxy-norcantharimide, and N-farnesyl-norcantharimide against Jurkat T cells relative to human normal lymphoblast: A quantitative pilot study. Medicine (Baltimore) 2016; 95:e4467. [PMID: 27495082 PMCID: PMC4979836 DOI: 10.1097/md.0000000000004467] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
The therapeutic safety of an anticancer drug is one of the most important concerns of the physician treating the cancer patient. Half maximal inhibitory concentration (IC50) and hillslope are usually used to represent the strength and sensitivity of an anticancer drug on cancer cells. The therapeutic safety of the anticancer drug can be assessed by comparing the IC50 and hillslope of anticancer drugs on cancer cells relative to normal cells. Since there are situations where "more anticancer activity" implies "more toxicity," the safety of an anticancer drug in these situations is hard to evaluate by using IC50 and hillslope alone. In a previous study, the "net effect" index was devised to represent the net therapeutic effects of one anticancer drug relative to the other. However, the therapeutic safety of one specific anticancer drug alone was not defined in the "net effect" index. This study introduced the "safety index (SI)" to quantify the degree of safety of an anticancer drug by using 4-parameter logistic model on cancer cells relative to normal cells. The therapeutic safety of norcantharidin (NCTD), N-farnesyloxy-norcantharimide (NOC15), and N-farnesyl-norcantharimide (NC15) in the treatment of Jurkat T cells relative to human normal lymphoblast was compared using the newly defined SI. We found that the SI of NOC15 and NC15 was significantly higher than that of NCTD, suggesting that both NOC15 and NC15 can damage more cancer cells and less normal cells than NCTD. We conclude that both NOC15 and NC15 are safer anticancer drugs than NCTD in the treatment of Jurkat T cells relative to human normal lymphoblast. The SI can be further applied to the screening, developments, and applications of anticancer drugs in the future.
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Affiliation(s)
- Ming-Che Chang
- Laboratory of Biophysics, Department of Medical Research, Taipei Veterans General Hospital, Taipei
| | - Jin-Yi Wu
- Department of Microbiology, Immunology and Biopharmaceutics, College of Life Sciences
| | - Hui-Fen Liao
- Department of Molecular Biology and Biochemistry, National Chiayi University, Chiayi
| | - Yu-Jen Chen
- Department of Radiation Oncology, Mackay Memorial Hospital, Taipei
| | - Cheng-Deng Kuo
- Laboratory of Biophysics, Department of Medical Research, Taipei Veterans General Hospital, Taipei
- Chest Medicine and Physiological Signals Research Center, Changhua Christian Hospital, Changhua, Taiwan
- Correspondence: Cheng-Deng Kuo, Chest Medicine and Physiological Signals Research Center, Changhua Christian Hospital, Changhua 500, Taiwan (e-mail: )
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N-Farnesyloxy-norcantharimide inhibits progression of human leukemic Jurkat T cells through regulation of mitogen-activated protein kinase and interleukin-2 production. Anticancer Drugs 2015; 26:1034-42. [PMID: 26288134 PMCID: PMC4588604 DOI: 10.1097/cad.0000000000000284] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
This study investigated the anticancer effects of N-farnesyloxy-norcantharimide (NOC15), a newly synthesized norcantharidin (NCTD) analogue, on human leukemic Jurkat T cells and the signaling pathway underlying its effects. We found that the half maximal inhibitory concentration (IC50) of NOC15 on Jurkat T cells is 1.4 μmol/l, which is 11.14-fold (=15.6÷1.4) smaller than the 15.6 μmol/l of NCTD on Jurkat T cells, whereas the IC50 of NOC15 on human normal lymphoblast (HNL) is 207.9 μmol/l, which is 8.17-fold (=1698.0÷207.8) smaller than the 1698.0 μmol/l of NCTD on HNL cells. These results indicated that NOC15 exerts a higher anticancer effect on Jurkat T cells and has higher toxicity toward HNL cells than NCTD. Thus, NOC15 is 1.36-fold (=11.14÷8.17) beneficial as an anticancer agent toward Jurkat T cells compared with NCTD. Moreover, NOC15 can increase the percentage of cells in the sub-G1 phase and reduce the cell viability of Jurkat T cells, stimulate p38 and extracellular signal-regulated protein kinase 1/2 (ERK1/2) of mitogen-activated protein kinases (MAPKs) signaling pathway, and inhibit calcineurin expression and interleukin-2 (IL-2) production. However, NOC15 exerted no effects on the Jun-N-terminal kinase 1/2 (JNK1/2) signaling pathway, the production of IL-8, and tumor necrosis factor-α. We conclude that the anticancer activity of the newly synthesized NOC15 is 1.36-fold beneficial than NCTD as an anticancer agent and that NOC15 can increase the percentage of cells in the sub-G1 phase through the stimulation of p38 and ERK1/2 of the MAPK signaling pathway and the inhibition of calcineurin expression and IL-2 production. The NOC15 may have the potential of being developed into an anticancer agent in the future.
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21
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N-Farnesyloxy-norcantharimide and N-farnesyl-norcantharimide inhibit the progression of leukemia and increase survival days in a syngeneic mouse leukemia model. Anticancer Drugs 2015; 26:508-17. [PMID: 25588161 DOI: 10.1097/cad.0000000000000210] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
This study investigated the anticancer effects of two newly synthesized norcantharidin analogs, N-farnesyloxy-norcantharimide (NOC15) and N-farnesyl-norcantharimide (NC15), in L1210 cells and in a syngeneic mouse leukemia model (L1210 cell line plus DBA/2 mice). We found that the half-maximal inhibitory concentration (IC50) of NOC15 and NC15 on L1210 cells is 1.56 and 2.62 μmol/l, respectively, and that the IC50 of NOC15 and NC15 on human normal lymphoblast is 207.9 and 2569 μmol/l, respectively. In cell cycle analysis, NOC15 could increase the sub-G1 phase, whereas NC15 could induce G2/M arrest. Annexin-V apoptosis assay indicated that both NOC15 and NC15 could induce cell apoptosis. In the syngeneic mouse leukemia model, both NOC15 and NC15 could increase the survival days of mice and decrease the tumor weight. Moreover, both NOC15 and NC15 could retard the increase in peripheral blood leukocyte count due to L1210 cells. In the subcutaneous (s.c.) group, the treatment with NOC15 could retard the decrease in the weight of the liver and the spleen caused by L1210 cells, whereas the treatment with NC15 could retard the decrease in the weight of the spleen caused by L1210 cells. We conclude that the new compounds NOC15 and NC15 have strong anticancer activity and low toxicity both in vitro and in vivo. NOC15 and NC15 may have the potential to be developed into anticancer agents in the future.
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Wu JY, Kuo CD, Chu CY, Chen MS, Lin JH, Chen YJ, Liao HF. Synthesis of novel lipophilic N-substituted norcantharimide derivatives and evaluation of their anticancer activities. Molecules 2014; 19:6911-28. [PMID: 24865603 PMCID: PMC6271113 DOI: 10.3390/molecules19066911] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2014] [Revised: 05/21/2014] [Accepted: 05/22/2014] [Indexed: 12/16/2022] Open
Abstract
This research attempted to study the effect of lipophilicity on the anticancer activity of N-substituted norcantharimide derivatives. Twenty-three compounds were synthesized and their cytotoxicities against five human cancer cell lines studied. The lipophilicity of each derivative was altered by its substituent, an alkyl, alkyloxy, terpenyl or terpenyloxy group at the N-position of norcantharimide. Further, among all synthesized derivatives studied, the compounds N-farnesyloxy-7-oxabicyclo[2.2.1]heptane-2,3-dicarboximide (9), and N-farnesyl-7-oxabicyclo[2.2.1]heptane-2,3-dicarboximide (18), have shown the highest cytotoxicity, anti-proliferative and apoptotic effect against human liver carcinoma HepG2 cell lines, yet displayed no significant cytotoxic effect on normal murine embryonic liver BNL CL.2 cells. Their overall performance led us to believe that these two compounds might be potential candidates for anticancer drugs development.
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Affiliation(s)
- Jin-Yi Wu
- Department of Microbiology, Immunology and Biopharmaceutics, College of Life Sciences, National Chiayi University, Chiayi 60004, Taiwan.
| | - Cheng-Deng Kuo
- Laboratory of Biophysics, Department of Medical Research, Taipei Veterans General Hospital, Taipei 11217, Taiwan
| | - Chien-Yu Chu
- Department of Microbiology, Immunology and Biopharmaceutics, College of Life Sciences, National Chiayi University, Chiayi 60004, Taiwan
| | - Min-Shin Chen
- Department of Microbiology, Immunology and Biopharmaceutics, College of Life Sciences, National Chiayi University, Chiayi 60004, Taiwan
| | - Jia-Hua Lin
- Department of Microbiology, Immunology and Biopharmaceutics, College of Life Sciences, National Chiayi University, Chiayi 60004, Taiwan
| | - Yu-Jen Chen
- Department of Radiation Oncology, Mackay Memorial Hospital, New Taipei City 25160, Taiwan
| | - Hui-Fen Liao
- Department of Biochemical Science and Technology, College of Life Sciences, National Chiayi University, Chiayi 60004, Taiwan
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Hizartzidis L, Tarleton M, Gordon CP, McCluskey A. Chemoselective flow hydrogenation approaches to isoindole-7-carboxylic acids and 7-oxa-bicyclio[2.2.1]heptanes. RSC Adv 2014. [DOI: 10.1039/c3ra47657j] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
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Yu CH, Liu ZY, Sun LS, Li YJ, Zhang DS, Pan RT, Sun ZL. Effect of Danofloxacin on Reactive Oxygen Species Production, Lipid Peroxidation and Antioxidant Enzyme Activities in Kidney Tubular Epithelial Cell Line, LLC-PK1. Basic Clin Pharmacol Toxicol 2013; 113:377-84. [PMID: 23855763 DOI: 10.1111/bcpt.12110] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2013] [Accepted: 07/09/2013] [Indexed: 12/18/2022]
Abstract
The purpose of this study was to investigate the possibility that oxidative stress was involved in danofloxacin-induced toxicity in renal tubular cells epithelial cell line (LLC-PK1). Confluent LLC-PK1 cells were incubated with various concentrations of danofloxacin. The extent of oxidative damage was assessed by measuring the reactive oxygen species (ROS) level, lipid peroxidation, cell apoptosis and antioxidative enzyme activities. Danofloxacin induced a concentration-dependent increase in the ROS production, not even cytotoxic conditions. Similarly, danofloxacin caused an about 4 times increase in the level of thiobarbituric acid reactive substances at the concentration of 400 μM for 24 hr, but it did not induce cytotoxicity and apoptosis. Antioxidant enzymes activities, such as superoxide dismutase (SOD) and catalase (CAT), were increased after treatment with 100, 200 and 400 μM of danofloxacin for 24 hr. The activity of glutathione peroxidase (GPX) was significantly decreased in a concentration-dependent manner. In addition, ROS production, lipid peroxidation and GPX decline were inhibited by additional glutathione and N-acetyl cysteine. These data suggested that danofloxacin could not induce oxidative stress in LLC-PK1 cells at the concentration (≤400 μM) for 24 hr. The increase levels of ROS and lipid peroxidation could be partly abated by the increase activities of SOD and CAT.
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Affiliation(s)
- Chun-Hong Yu
- Hunan Engineering Research Center of Veterinary Drug, College of Veterinary Medicine, Hunan Agricultural University, Changsha, China
| | - Zhao-Ying Liu
- Hunan Engineering Research Center of Veterinary Drug, College of Veterinary Medicine, Hunan Agricultural University, Changsha, China
| | - Lei-Sheng Sun
- College of Pharmacy, China Pharmaceutical University, Nanjing, China
| | - Yu-Juan Li
- Hunan Engineering Research Center of Veterinary Drug, College of Veterinary Medicine, Hunan Agricultural University, Changsha, China
| | - Da-Sheng Zhang
- Hunan Engineering Research Center of Veterinary Drug, College of Veterinary Medicine, Hunan Agricultural University, Changsha, China
| | - Ren-Tao Pan
- Hunan Engineering Research Center of Veterinary Drug, College of Veterinary Medicine, Hunan Agricultural University, Changsha, China
| | - Zhi-Liang Sun
- Hunan Engineering Research Center of Veterinary Drug, College of Veterinary Medicine, Hunan Agricultural University, Changsha, China
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Kim YM, Ku MJ, Son YJ, Yun JM, Kim SH, Lee SY. Anti-metastatic effect of cantharidin in A549 human lung cancer cells. Arch Pharm Res 2013; 36:479-84. [PMID: 23435912 DOI: 10.1007/s12272-013-0044-3] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2012] [Accepted: 01/28/2013] [Indexed: 11/28/2022]
Abstract
Cancer metastasis is represented by migration and invasion of cancer cells. Cancer cells invade into the blood or lymphatic vessels and this leads to the spread of cancer into the organs in distant sites. For cancer cells to migrate, extracellular matrix (ECM) must be degraded. Cantharidin, a compound derived from blister beetles, is known for its anti-cancer effect in several cancer cells. Here we report that cantharidin inhibits migration and invasion of A549 human lung cancer cell. We found that cantharidin inhibits activation of phosphatidylinositol 3-kinase/Akt signaling pathway. This leads to the selective attenuation of one of the gelatinases, matrix metalloproteinase 2, which can degrade components of ECM, and inhibits migration and invasion of A549 human lung cancer cell.
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Affiliation(s)
- Young Min Kim
- Department of Life Science, Gachon University, San 65, Bokjeong-Dong, Sujeong-Gu, Seongnam-Si, Kyeonggi-Do, 461-701, Korea
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26
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Norcantharidin inhibits proliferation and fibronectin expression of HK-2 cells induced by albumin in vitro. Cell Biol Int 2012; 35:1239-41. [PMID: 21675961 DOI: 10.1042/cbi20100850] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The present study aims to observe the effects of NCTD (norcantharidin) on proliferation and FN (fibronectin) expression in human renal proximal tubular epithelial cell line (HK-2) induced by albumin in vitro. HK-2 cells were divided into control group, albumin group and different concentration of NCTD intervention groups. Proliferation of HK-2 cells was determined by MTT [3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-2H-tetrazolium bromide], FN protein in culture media of HK-2 cells was examined by ELISA, and FN mRNA was analysed by RT-PCR (reverse transcription-PCR). We chose less than 5.0 mg/l of NCTD as the experimental concentration for the cytotoxicity test. MTT score was higher in the albumin group than in the control group (P<0.05). As compared with that of the albumin group, MTT score and FN protein concentration decreased, FN mRNA significantly down-regulated in NCTD intervention groups respectively (P<0.05). Our study showed that NCTD could inhibit the albumin-induced cell proliferation and FN expression in HK-2 cells, which might further prove the anti-fibrotic role of NCTD in proteinuria-associated tubulointerstitial damage.
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Norcantharidin inhibits the expression of extracellular matrix and TGF-β1 in HK-2 cells induced by high glucose independent of calcineurin signal pathway. J Transl Med 2011; 91:1706-16. [PMID: 21931301 DOI: 10.1038/labinvest.2011.119] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Norcantharidin (NCTD) was shown in our previous studies to attenuate renal tubulointerstitial fibrosis in rat models with diabetic nephropathy (DN). The aim of this study was to determine the effects of NCTD on the expression of extracellular matrix (ECM) and TGF-β1 in HK-2 cells stimulated by high glucose and on calcineurin (CaN)/NFAT pathway. Whether or not the antifibrotic effect of NCTD on renal interstitium was dependent on its inhibition of CaN pathway was also investigated. Experimental concentrations of NCTD were verified by cytotoxic test and MTT assay. HK-2 cells were transfected with CaN small interference RNA (siRNA). The mRNA and protein expressions of FN, ColIV, TGF-β1, and CaN in HK-2 cells were detected by real-time PCR and western blot. The CaN/NFAT pathway was examined by indirect immunofluorescence and western blot. Our study revealed that NCTD concentrations over 5 mg/l had overt cytotoxicity on HK-2 cells. Meanwhile, both 2.5 and 5 mg/l NCTD inhibited HK-2 cell proliferation (P < 0.05). NCTD inhibited the upregulation of FN, ColIV, and TGF-β1 of HK-2 cells stimulated by high glucose (P < 0.05), and also significantly downregulated the expression of CaN mRNA and protein in HK-2 cells (P < 0.05). In addition, not only was the nuclear translocation of NFATc inhibited, but its protein level in the nucleus was also reduced. Following CaN siRNA transfection, CaN mRNA and protein expression were significantly decreased. In contrast, the protein levels of FN, ColIV, and TGF-β1 increased in HK-2 cells stimulated by high glucose (P < 0.05). However, NCTD treatment downregulated their expression. These results indicated that NCTD could decrease the expression of ECM and TGF-β1 in HK-2 cells stimulated by high glucose, downregulate CaN expression, and block the CaN/NFAT signaling pathway. However, the effect of NCTD on inhibition of the expression of ECM and TGF-β1 was not associated with its inhibition of the CaN/NFAT pathway.
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Cimmino F, Scoppettuolo MN, Carotenuto M, De Antonellis P, Dato VD, De Vita G, Zollo M. Norcantharidin impairs medulloblastoma growth by inhibition of Wnt/β-catenin signaling. J Neurooncol 2011; 106:59-70. [PMID: 21735115 DOI: 10.1007/s11060-011-0645-y] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2011] [Accepted: 06/18/2011] [Indexed: 01/12/2023]
Abstract
Medulloblastoma is one of the leading causes of morbidity and mortality in pediatric cancer. Wnt-active tumors, an independent molecular subgroup in medulloblastoma, are characterized by a distinct pattern of genomic aberrations. We assessed the anticancer activity of cantharidin and norcantharidin against medulloblastoma, as cell lines in vitro and in athymic nude mice in vivo. Cantharidin and norcantharidin treatment impaired the growth of DAOY and UW228 medulloblastoma cells and promoted the loss of β-catenin activation and the β-catenin nuclearization linked to N-cadherin impairment in vitro. Intra-peritoneal administration of norcantharidin inhibited the growth of intra-cerebellum tumors in orthotopic xenograft nude mice. Analysis of the xenograft tissues revealed enhanced neuronal differentiation and reduced β-catenin expression. Our findings suggest that norcantharidin has potential therapeutic applications in the treatment of medulloblastoma as a result of its ability to cross the blood-brain barrier and its impairment of Wnt-β-catenin signaling.
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Affiliation(s)
- Flora Cimmino
- CEINGE, Centro di Ingegneria Genetica, Biotecnologie Avanzate, Via Gaetano Salvatore 486, 80145 Naples, Italy
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Li Y, Chen Q, Liu FY, Peng YM, Hou T, Duan SB, Li J, Luo JH, Sun L, Ling GH. Norcantharidin attenuates tubulointerstitial fibrosis in rat models with diabetic nephropathy. Ren Fail 2011; 33:233-41. [PMID: 21332346 DOI: 10.3109/0886022x.2011.553305] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
OBJECTIVE To investigate the effects of norcantharidin (NCTD) on tubulointerstitial fibrosis of diabetic nephropathy (DN) in streptozotocin-induced rat model. METHODS Sprague-Dawley rats were randomly divided into control group, model group, low-dose NCTD (0.05 mg/kg/day) group, and high-dose NCTD (0.1 mg/kg/day) group. The model group was induced by injection intraperitoneally with 30 mg/kg streptozotocin in 0.1 mol/L sodium citrate solution (pH 4.5), after high-calorie foods were given for 2 months. NCTD was administered daily after the DN rat model was built. Rats were sacrificed at the end of the third and the eighth week; renal fibrosis and the expression of FN, collagen IV, TGF-β1, and calcineurin (CaN) were detected by Masson and immunohistochemistry staining, respectively. RESULTS Tubulointerstitial fibrosis was observed in DN rats, this kind of pathological changes was ameliorated in NCTD treatment group (p < 0.05). The expressions of FN, collagen IV, and TGF-β1 protein increased in the tubulointerstitial field of DN rats compared with the rats in control group. NCTD treatment could dose-dependently decrease their expression and reverse the fibrotic degree (p < 0.05). Meanwhile, the expression of CaN was detected in tubular fields of normal kidney and increased in the tubulointerstitial field in DN rats. However, NCTD downregulated its expression in a dose-dependent manner (p < 0.05). CONCLUSIONS NCTD could downregulate FN, collagen IV, and TGF-β1 expression in tubulointerstitial fields and attenuate tubulointerstitial fibrosis in the early stage of DN rats. NCTD also alleviated the expression of CaN in tubules in DN. The relationship between the role of NCTD's anti-tubulointerstitial fibrosis and its inhibition to CaN expression remains to be further elucidated.
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Affiliation(s)
- Ying Li
- Division of Nephrology, The Second Xiangya Hospital, Research Institute of Nephrology, Central South University, Changsha, PR China.
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Norcantharidin induces cell cycle arrest and inhibits progression of human leukemic Jurkat T cells through mitogen-activated protein kinase-mediated regulation of interleukin-2 production. Toxicol In Vitro 2011; 25:206-12. [DOI: 10.1016/j.tiv.2010.11.001] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2010] [Revised: 10/06/2010] [Accepted: 11/03/2010] [Indexed: 01/01/2023]
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Chen YJ, Chang WM, Liu YW, Lee CY, Jang YH, Kuo CD, Liao HF. A small-molecule metastasis inhibitor, norcantharidin, downregulates matrix metalloproteinase-9 expression by inhibiting Sp1 transcriptional activity in colorectal cancer cells. Chem Biol Interact 2009; 181:440-6. [DOI: 10.1016/j.cbi.2009.07.004] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2009] [Revised: 07/03/2009] [Accepted: 07/07/2009] [Indexed: 11/30/2022]
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Chen YC, Chang SC, Wu MH, Chuang KA, Wu JY, Tsai WJ, Kuo YC. Norcantharidin reduced cyclins and cytokines production in human peripheral blood mononuclear cells. Life Sci 2008; 84:218-26. [PMID: 19100750 DOI: 10.1016/j.lfs.2008.11.020] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2008] [Revised: 11/04/2008] [Accepted: 11/27/2008] [Indexed: 12/24/2022]
Abstract
AIMS To evaluate potential agents of therapeutic value in tissue inflammation, we studied norcantharidin (NCTD) and its derivatives for their effects on immune responses of human peripheral blood mononuclear cells (PBMC) in vitro. MAIN METHODS PBMC proliferation was evaluated by tritiated thymidine uptake method. The production and gene expression of cytokines were determined with enzyme immunoassays (EIA) and reverse transcription-polymerase chain reaction (RT-PCR), respectively. KEY FINDINGS Five derivatives from NCTD had no significant effect on cell proliferation in PBMC. NCTD inhibited PBMC proliferation induced by phytohemagglutinin (PHA) with a 50% inhibitory concentration (IC(50)) 42.1+/-2.3 microM. The inhibitory action of NCTD did not involve direct cytotoxicity. To localize the point in the PBMC proliferation where arrest occurred, a set of key regulatory events leading to the cell proliferation, including cell cycle progression, production and gene expression of interleukin-2 (IL-2), IL-4, IL-10, and interferon-gamma (IFN-gamma) and cyclins was examined. Data demonstrated NCTD arrested the cell cycle progression of activated PBMC from the G1 transition to the S phase. The cyclin D3, E, A, and B transcripts and protein production in PHA-treated PBMC was reduced by NCTD. Whereas NCTD exerted no effect on IL-4 and IFN-gamma production, it significantly alleviated the production and mRNA expression of IL-2 and IL-10 in activated PBMC. SIGNIFICANCE The suppressant effects of NCTD on proliferation of PBMC activated by PHA therefore appear to be mediated, at least in part, through inhibition of cyclins and IL-2 production and arrest of cell cycle progression in the cells.
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Affiliation(s)
- Yi-Chun Chen
- Institute of Pharmacology, National Yang-Ming University, Taiwan, ROC
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Norcantharidin induces anoikis through Jun-N-terminal kinase activation in CT26 colorectal cancer cells. Anticancer Drugs 2008; 19:55-64. [DOI: 10.1097/cad.0b013e3282f18826] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Pang SK, Yu CW, Au-Yeung SCF, Ho YP. DNA damage induced by novel demethylcantharidin-integrated platinum anticancer complexes. Biochem Biophys Res Commun 2007; 363:235-40. [PMID: 17868646 DOI: 10.1016/j.bbrc.2007.08.172] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2007] [Accepted: 08/29/2007] [Indexed: 11/21/2022]
Abstract
Oxaliplatin is a third generation platinum (Pt) drug with a diaminocyclohexane (DACH) entity, which has recently obtained worldwide approval for the clinical treatment of colon cancer, and apparently operates by a different mechanism of action to the classical cisplatin or carboplatin. Introducing a novel dual mechanism of action is one approach in designing a new platinum-based anticancer agent, whereby an appropriate ligand, such as demethylcantharidin (DMC), is released from the parent compound to exert a cytotoxic effect, in addition to that of the DNA-alkylating function of the platinum moiety. To investigate the likelihood of a novel dual mechanism of anticancer action, demethylcantharidin-integrated Pt complexes: Pt(R,R-DACH)(DMC) with the same Pt-DACH moiety as oxaliplatin, and Pt(NH(3))(2)(DMC) akin to carboplatin; were studied for their ability to induce DNA damage in HCT116 colorectal cancer cells by an alkaline comet assay. The results showed that the DMC ligand released from the novel complexes caused additional DNA lesions when compared with oxaliplatin and carboplatin. The comet assay also revealed that the DNA-damaging behavior of cisplatin is characteristically different; and this study is the first to demonstrate the ability of DMC to induce DNA lesions, thus providing sufficient evidence to explain the superior antiproliferative effect of the novel DMC-integrated complexes.
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Affiliation(s)
- Siu-Kwong Pang
- School of Pharmacy, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR, China
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Liao HF, Su SL, Chen YJ, Chou CH, Kuo CD. Norcantharidin preferentially induces apoptosis in human leukemic Jurkat cells without affecting viability of normal blood mononuclear cells. Food Chem Toxicol 2007; 45:1678-87. [PMID: 17442474 DOI: 10.1016/j.fct.2007.03.003] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2006] [Revised: 10/27/2006] [Accepted: 03/02/2007] [Indexed: 01/17/2023]
Abstract
Norcantharidin (NCTD) is known to have anti-cancer potentials. The aim of this study was to assess the apoptosis-inducing effect of NCTD on human leukemic Jurkat cells. We found that NCTD preferentially inhibited the growth of Jurkat cells in a dose- and time-dependent manner, but not the growth of normal blood mononuclear cells (MNC). Pretreatment with agonistic (CH-11) and antagonistic (ZB4) Fas antibodies on Jurkat cells showed that NCTD-induced apoptosis might not involve Fas-FasL signaling. Flow cytometric assay of Jurkat cells treated with NCTD showed a markedly increased sub-G1 DNA phase and cell cycle arrest at S phase. Western blot analysis of NCTD-treated cells showed increased expressions of cytochrome c, active caspase-9 and -3, and cleavage of poly(ADP-ribose) polymerase (PARP), but the expressions of Bcl-2, Bax and apoptosis-inducing factor were not increased. The transcription factor STAT1 was translocated from cytosol to nucleus. Pancaspase inhibitor z-VAD-FMK not only limited the level of sub-G1 phase, but also prevented the degradation of PARP in NCTD-treated cells. The NCTD-induced cell cycle arrest and apoptosis were mediated through the regulation of ataxia-telangiectasia mutated (ATM), rather than P63 protein. The conditioned medium produced from human MNC (NCTD-MNC-CM) increased the percentage of apoptotic cells and the expression of PARP cleavage in Jurkat cells. Protein array assay of NCTD-MNC-CM showed 32.4- and 6.2-folds increases in TNF-alpha and GM-CSF, respectively, and the expression of MCP-1, GRO, RANTES and IL-10 was decreased. We conclude that NCTD can induce apoptosis in human leukemic Jurkat cells via a caspase-dependent pathway without affecting the viability of normal MNC, and that the apoptosis-inducing effect of NCTD can also be achieved by soluble cytokines produced from peripheral MNC.
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Affiliation(s)
- Hui-Fen Liao
- Laboratory of Biophysics, Department of Research and Education, Taipei Veterans General Hospital, Taipei 112, Taiwan
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