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Chiu CH, Ramesh S, Liao PH, Kuo WW, Chen MC, Kuo CH, Li CC, Wang TF, Lin YM, Lin YJ, Huang CY. Phosphorylation of Bcl-2 by JNK confers gemcitabine resistance in lung cancer cells by reducing autophagy-mediated cell death. ENVIRONMENTAL TOXICOLOGY 2023; 38:2121-2131. [PMID: 37219008 DOI: 10.1002/tox.23836] [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: 03/15/2023] [Revised: 04/26/2023] [Accepted: 05/07/2023] [Indexed: 05/24/2023]
Abstract
The most common cancer-related death in the world is non-small cell lung cancer (NSCLC). Gemcitabine (GEM) is a common and effective first-line chemotherapeutic drug for the treatment of NSCLC. However, the long-term use of chemotherapeutic drugs in patients usually induces cancer cell drug resistance, leading to poor survival, and prognosis. In this study, to observe and explore the key targets and potential mechanisms of NSCLC resistance to GEM, we first cultured lung cancer CL1-0 cells in a GEM-containing medium to induce CL1-0 cells to develop GEM resistance. Next, we compared protein expression between the parental and GEM-R CL1-0 cell groups. We observed significantly lower expression of autophagy-related proteins in GEM-R CL1-0 cells than in parental CL1-0 cells, indicating that autophagy is associated with GEM resistance in CL1-0 cells. Furthermore, a series of autophagy experiments revealed that GEM-R CL1-0 cells had significantly reduced GEM-induced c-Jun N-terminal kinase phosphorylation, which further affected the phosphorylation of Bcl-2, thereby reducing the dissociation of Bcl-2 and Beclin-1 and ultimately reducing the generation of GEM-induced autophagy-dependent cell death. Our findings suggest that altering the expression of autophagy is a promising therapeutic option for drug-resistant lung cancer.
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Affiliation(s)
- Chih-Hao Chiu
- Graduate Institute of Biomedical Sciences, China Medical University, Taichung, Taiwan
| | - Samiraj Ramesh
- Cardiovascular and Mitochondrial Related Disease Research Center, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien, Taiwan
- Department of Research and Innovation, Institute of Biotechnology, Saveetha School of Engineering (SSE), Saveetha Institute of Medical and Technical Sciences (SIMATS), Chennai, India
| | - Po-Hsiang Liao
- Division of General Surgery, Department of Surgery, Shuang Ho Hospital, Taipei Medical University, New Taipei City, Taiwan
| | - Wei-Wen Kuo
- Department of Biological Science and Technology, College of Biopharmaceutical and Food Sciences, China Medical University, Taichung, Taiwan
| | - Ming-Cheng Chen
- Division of Colorectal Surgery, Department of Surgery, Taichung Veterans General Hospital, Taichung, Taiwan
- Institute of Traditional Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Chia-Hua Kuo
- Laboratory of Exercise Biochemistry, University of Taipei, Taipei, Taiwan
| | - Chi-Cheng Li
- Center of Stem Cell & Precision Medicine, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien, Taiwan
| | - Tso-Fu Wang
- Department of Hematology and Oncology, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien, Taiwan
| | - Yueh-Min Lin
- Department of Pathology, Changhua Christian Hospital, Changhua, Taiwan
- Department of Medical Technology, Jen-Teh Junior College of Medicine, Nursing and Management, Miaoli, Taiwan
| | - Yu-Jung Lin
- Cardiovascular and Mitochondrial Related Disease Research Center, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien, Taiwan
| | - Chih-Yang Huang
- Graduate Institute of Biomedical Sciences, China Medical University, Taichung, Taiwan
- Cardiovascular and Mitochondrial Related Disease Research Center, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien, Taiwan
- Center of General Education, Buddhist Tzu Chi Medical Foundation, Tzu Chi University of Science and Technology, Hualien, Taiwan
- Department of Medical Research, China Medical University Hospital, China Medical University, Taichung, Taiwan
- Department of Medical Laboratory Science and Biotechnology, Asia University, Taichung, Taiwan
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2
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Yu T, Xu X, Mao H, Han X, Liu Y, Zhang H, Lai J, Gu J, Xia M, Hu C, Li D. Fenpropathrin exposure induces neurotoxicity in zebrafish embryos. FISH PHYSIOLOGY AND BIOCHEMISTRY 2022; 48:1539-1554. [PMID: 36266516 DOI: 10.1007/s10695-022-01134-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2022] [Accepted: 10/10/2022] [Indexed: 06/16/2023]
Abstract
Fenpropathrin has been a commonly used insecticide to control agricultural and household insects over a few decades. Up to now, fenpropathrin residue in soil and water has been often determined due to its widespread use, which poses serious threat to environment and aquatic organisms. The potential of fenpropathrin to affect aquatic lives is still poorly understood. In this study, we used zebrafish (Danio rerio) embryo as an experimental model system to evaluate the toxicity of fenpropathrin to the development of zebrafish nervous system. Zebrafish embryos were separately exposed to fenpropathrin at the dose of 0.016 mg/L, 0.032 mg/L, 0.064 mg/L, starting at 6 h post-fertilizationhpf (hpf) up to 96 hpf. The results showed that fenpropathrin exposure gives rise to physiological, behavioral, and neurodevelopmental impairments in zebrafish embryos, including enhanced acetylcholinesterase (AChE) activity, abnormal swimming behavior, karyopyknosis in brain cells, increased intercellular space, and uneven migration of neuron in brain area. In addition, the expressions of genes concerning neurodevelopment and neurotransmitter system were inhibited following fenpropathrin exposure. We also found that fenpropathrin exposure distinctly induced oxidative stress by increasing reactive oxygen species (ROS) generation and inhibiting the production of antioxidant enzymes catalase (CAT) and superoxide dismutase (SOD). Expectedly, some apoptosis-associated genes were induced and the apoptosis appeared in the brain and heart cells of zebrafish embryos. Moreover, fenpropathrin exposure also inhibited the expressions of genes in Nrf2 signaling pathway, such as heme oxygenase-1 (HO-1) and SOD. In summary, the results of this study indicate that oxidative stress-triggered apoptosis may be an underlying fundamental of fenpropathrin-induced neurotoxicity in zebrafish embryos.
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Affiliation(s)
- Tingting Yu
- School of Life Science, Nanchang University, Nanchang, 330031, Jiangxi, China
| | - Xiaowen Xu
- School of Life Science, Nanchang University, Nanchang, 330031, Jiangxi, China
| | - Huiling Mao
- School of Life Science, Nanchang University, Nanchang, 330031, Jiangxi, China
| | - Xue Han
- School of Life Science, Nanchang University, Nanchang, 330031, Jiangxi, China
| | - Yulong Liu
- School of Life Science, Nanchang University, Nanchang, 330031, Jiangxi, China
| | - Hongying Zhang
- School of Life Science, Nanchang University, Nanchang, 330031, Jiangxi, China
| | - Jingli Lai
- School of Life Science, Nanchang University, Nanchang, 330031, Jiangxi, China
| | - Jianfeng Gu
- School of Life Science, Nanchang University, Nanchang, 330031, Jiangxi, China
| | - Mengling Xia
- School of Life Science, Nanchang University, Nanchang, 330031, Jiangxi, China
| | - Chengyu Hu
- School of Life Science, Nanchang University, Nanchang, 330031, Jiangxi, China
| | - Dongming Li
- School of Life Science, Nanchang University, Nanchang, 330031, Jiangxi, China.
- School of Basic Medical Sciences, Fuzhou Medical College, Nanchang University, Fuzhou, 344000, Jiangxi, China.
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Imidazopyridazine Acetylcholinesterase Inhibitors Display Potent Anti-Proliferative Effects in the Human Neuroblastoma Cell-Line, IMR-32. Molecules 2021; 26:molecules26175319. [PMID: 34500749 PMCID: PMC8434581 DOI: 10.3390/molecules26175319] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Revised: 08/23/2021] [Accepted: 08/27/2021] [Indexed: 11/29/2022] Open
Abstract
Imidazo[1,2-b]pyridazine compounds are a new class of promising lead molecules to which we have incorporated polar nitro and amino moieties to increase the scope of their biological activity. Two of these substituted 3-nitro-6-amino-imidazo[1,2-b]pyridazine compounds (5c and 5h) showed potent acetylcholinesterase (AChE) inhibitory activity (IC50 40–50 nM), which we have previously reported. In this study, we wanted to test the biological efficacy of these compounds. Cytotoxicity assays showed that compound 5h mediated greater cell death with over 43% of cells dead at 100 μM and activation of caspase 3-mediated apoptosis. On the other hand, compound 5c mediated a dose-dependent decrease in cell proliferation. Both compounds showed cell cycle arrest in the G0/G1 phase and reduced cellular ATP levels leading to activation of adenosine monophosphate-activated protein kinase (AMPK) and enhanced mitochondrial oxidative stress. It has to be noted that all these effects were observed at doses beyond 10 μM, 200-fold above the IC50 for AChE inhibition. Both compounds also inhibited bacterial lipopolysaccharide-mediated cyclooxygenase-2 and nitric oxide release in primary rat microglial cells. These results suggested that the substituted imidazo (1,2-b) pyridazine compounds, which have potent AChE inhibitory activity, were also capable of antiproliferative, anti-migratory, and anti-inflammatory effects at higher doses.
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Hudáčová M, Hamuľaková S, Konkoľová E, Jendželovský R, Vargová J, Ševc J, Fedoročko P, Soukup O, Janočková J, Ihnatova V, Kučera T, Bzonek P, Novakova N, Jun D, Junova L, Korábečný J, Kuča K, Kožurková M. Synthesis of New Biscoumarin Derivatives, In Vitro Cholinesterase Inhibition, Molecular Modelling and Antiproliferative Effect in A549 Human Lung Carcinoma Cells. Int J Mol Sci 2021; 22:ijms22083830. [PMID: 33917200 PMCID: PMC8068036 DOI: 10.3390/ijms22083830] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Revised: 03/30/2021] [Accepted: 04/01/2021] [Indexed: 12/29/2022] Open
Abstract
A series of novel C4-C7-tethered biscoumarin derivatives (12a–e) linked through piperazine moiety was designed, synthesized, and evaluated biological/therapeutic potential. Biscoumarin 12d was found to be the most effective inhibitor of both acetylcholinesterase (AChE, IC50 = 6.30 µM) and butyrylcholinesterase (BChE, IC50 = 49 µM). Detailed molecular modelling studies compared the accommodation of ensaculin (well-established coumarin derivative tested in phase I of clinical trials) and 12d in the human recombinant AChE (hAChE) active site. The ability of novel compounds to cross the blood–brain barrier (BBB) was predicted with a positive outcome for compound 12e. The antiproliferative effects of newly synthesized biscoumarin derivatives were tested in vitro on human lung carcinoma cell line (A549) and normal colon fibroblast cell line (CCD-18Co). The effect of derivatives on cell proliferation was evaluated by MTT assay, quantification of cell numbers and viability, colony-forming assay, analysis of cell cycle distribution and mitotic activity. Intracellular localization of used derivatives in A549 cells was confirmed by confocal microscopy. Derivatives 12d and 12e showed significant antiproliferative activity in A549 cancer cells without a significant effect on normal CCD-18Co cells. The inhibition of hAChE/human recombinant BChE (hBChE), the antiproliferative activity on cancer cells, and the ability to cross the BBB suggest the high potential of biscoumarin derivatives. Beside the treatment of cancer, 12e might be applicable against disorders such as schizophrenia, and 12d could serve future development as therapeutic agents in the prevention and/or treatment of Alzheimer’s disease.
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Affiliation(s)
- Monika Hudáčová
- Department of Biochemistry, Faculty of Science, Pavol Jozef Šafárik University in Košice, Šrobárova 2, 041 54 Košice, Slovakia; (M.H.); (E.K.); (M.K.)
| | - Slávka Hamuľaková
- Department of Organic Chemistry, Institute of Chemical Sciences, Faculty of Science, Pavol Jozef Šafárik University in Košice, Moyzesova 11, 040 01 Kosice, Slovakia
- Correspondence:
| | - Eva Konkoľová
- Department of Biochemistry, Faculty of Science, Pavol Jozef Šafárik University in Košice, Šrobárova 2, 041 54 Košice, Slovakia; (M.H.); (E.K.); (M.K.)
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo Náměstí 542/2, 160 00 Prague 6, Czech Republic
| | - Rastislav Jendželovský
- Department of Cellular Biology, Faculty of Science, Pavol Jozef Šafárik University in Košice, Šrobárova 2, 041 54 Košice, Slovakia; (R.J.); (J.V.); (J.Š.); (P.F.)
| | - Jana Vargová
- Department of Cellular Biology, Faculty of Science, Pavol Jozef Šafárik University in Košice, Šrobárova 2, 041 54 Košice, Slovakia; (R.J.); (J.V.); (J.Š.); (P.F.)
| | - Juraj Ševc
- Department of Cellular Biology, Faculty of Science, Pavol Jozef Šafárik University in Košice, Šrobárova 2, 041 54 Košice, Slovakia; (R.J.); (J.V.); (J.Š.); (P.F.)
| | - Peter Fedoročko
- Department of Cellular Biology, Faculty of Science, Pavol Jozef Šafárik University in Košice, Šrobárova 2, 041 54 Košice, Slovakia; (R.J.); (J.V.); (J.Š.); (P.F.)
| | - Ondrej Soukup
- Department of Toxicology and Military Pharmacy, Faculty of Military Health Sciences, University of Defense, Trebesska 1575, 500 05 Hradec Kralove, Czech Republic; (O.S.); (V.I.); (T.K.); (P.B.); (D.J.); (L.J.); (J.K.)
- Biomedical Research Centre, University Hospital Hradec Kralove, Sokolska 581, 500 05 Hradec Kralove, Czech Republic; (J.J.); (N.N.); (K.K.)
| | - Jana Janočková
- Biomedical Research Centre, University Hospital Hradec Kralove, Sokolska 581, 500 05 Hradec Kralove, Czech Republic; (J.J.); (N.N.); (K.K.)
| | - Veronika Ihnatova
- Department of Toxicology and Military Pharmacy, Faculty of Military Health Sciences, University of Defense, Trebesska 1575, 500 05 Hradec Kralove, Czech Republic; (O.S.); (V.I.); (T.K.); (P.B.); (D.J.); (L.J.); (J.K.)
| | - Tomáš Kučera
- Department of Toxicology and Military Pharmacy, Faculty of Military Health Sciences, University of Defense, Trebesska 1575, 500 05 Hradec Kralove, Czech Republic; (O.S.); (V.I.); (T.K.); (P.B.); (D.J.); (L.J.); (J.K.)
| | - Petr Bzonek
- Department of Toxicology and Military Pharmacy, Faculty of Military Health Sciences, University of Defense, Trebesska 1575, 500 05 Hradec Kralove, Czech Republic; (O.S.); (V.I.); (T.K.); (P.B.); (D.J.); (L.J.); (J.K.)
- Biomedical Research Centre, University Hospital Hradec Kralove, Sokolska 581, 500 05 Hradec Kralove, Czech Republic; (J.J.); (N.N.); (K.K.)
| | - Nikola Novakova
- Biomedical Research Centre, University Hospital Hradec Kralove, Sokolska 581, 500 05 Hradec Kralove, Czech Republic; (J.J.); (N.N.); (K.K.)
| | - Daniel Jun
- Department of Toxicology and Military Pharmacy, Faculty of Military Health Sciences, University of Defense, Trebesska 1575, 500 05 Hradec Kralove, Czech Republic; (O.S.); (V.I.); (T.K.); (P.B.); (D.J.); (L.J.); (J.K.)
- Biomedical Research Centre, University Hospital Hradec Kralove, Sokolska 581, 500 05 Hradec Kralove, Czech Republic; (J.J.); (N.N.); (K.K.)
| | - Lucie Junova
- Department of Toxicology and Military Pharmacy, Faculty of Military Health Sciences, University of Defense, Trebesska 1575, 500 05 Hradec Kralove, Czech Republic; (O.S.); (V.I.); (T.K.); (P.B.); (D.J.); (L.J.); (J.K.)
| | - Jan Korábečný
- Department of Toxicology and Military Pharmacy, Faculty of Military Health Sciences, University of Defense, Trebesska 1575, 500 05 Hradec Kralove, Czech Republic; (O.S.); (V.I.); (T.K.); (P.B.); (D.J.); (L.J.); (J.K.)
- National Institute of Mental Health, Topolová 748, 250 67 Klecany, Czech Republic
| | - Kamil Kuča
- Biomedical Research Centre, University Hospital Hradec Kralove, Sokolska 581, 500 05 Hradec Kralove, Czech Republic; (J.J.); (N.N.); (K.K.)
| | - Mária Kožurková
- Department of Biochemistry, Faculty of Science, Pavol Jozef Šafárik University in Košice, Šrobárova 2, 041 54 Košice, Slovakia; (M.H.); (E.K.); (M.K.)
- Biomedical Research Centre, University Hospital Hradec Kralove, Sokolska 581, 500 05 Hradec Kralove, Czech Republic; (J.J.); (N.N.); (K.K.)
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Gao P, Wang H, Liu J, Wu Y, Hei W, He Z, Cai C, Guo X, Cao G, Li B. miR-128 regulated the proliferation and autophagy in porcine adipose-derived stem cells through targeting the JNK signaling pathway. J Recept Signal Transduct Res 2020; 41:196-201. [PMID: 32772776 DOI: 10.1080/10799893.2020.1805627] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
PURPOSE microRNA-128 (miR-128), a brain-enriched microRNA, has been reported to play a crucial role in the treatment of diseases. The c-Jun N-terminal kinase (JNK) signaling pathway exerts various biological functions such as regulation of cell proliferation, differentiation and apoptosis. In this study, we investigated the role of the miRNA-128-JNK signaling pathway in proliferation, apoptosis and autophagy of porcine adipose-derived stem cells (ASCs). METHODS After over-expressing miR-128 in porcine ASCs, cell proliferation was determined by 2,3-Bis-(2-Methoxy-4-Nitro-5-Sulfophenyl)-2H-Tetrazolium-5-Carboxanilide (XTT) method, cell apoptosis was observed by Flow cytometry (FCM), the expression of miR-128, B-cell lymphoma 2 (Bcl-2), and Bcl-2-associated X protein (Bax) was measured by RNA preparation and reverse transcription polymerase chain reaction (RT-PCR), and protein expression of JNK, phosphorylated JNK (p-JNK) and LC3B was analyzed by Western Blot analysis. RESULTS The over-expression of miR-128 potently promoted cell proliferation and autophagy while suppressed the apoptosis of porcine ASCs. In addition, the down-regulated expression level of p-JNK was detected in miR-128-over-expressed porcine ASCs. However, followed by the block of the JNK signaling pathway using SP600125 inhibitor, the effects of miR-128 on the proliferation, apoptosis and autophagy of porcine ASCs were significantly suppressed. CONCLUSION It is demonstrated that the miR-128-JNK signaling pathway is a potential therapeutic target for the treatment of obesity.
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Affiliation(s)
- Pengfei Gao
- Department of Animal Sciences and Veterinary Medicine, Shanxi Agricultural University, Taigu, China
| | - Haizhen Wang
- Department of Animal Sciences and Veterinary Medicine, Shanxi Agricultural University, Taigu, China
| | - Juan Liu
- Department of Animal Sciences and Veterinary Medicine, Shanxi Agricultural University, Taigu, China
| | - Yiqi Wu
- Department of Animal Sciences and Veterinary Medicine, Shanxi Agricultural University, Taigu, China
| | - Wei Hei
- Department of Animal Sciences and Veterinary Medicine, Shanxi Agricultural University, Taigu, China
| | - Zhiqiang He
- Department of Animal Sciences and Veterinary Medicine, Shanxi Agricultural University, Taigu, China
| | - Chunbo Cai
- Department of Animal Sciences and Veterinary Medicine, Shanxi Agricultural University, Taigu, China
| | - Xiaohong Guo
- Department of Animal Sciences and Veterinary Medicine, Shanxi Agricultural University, Taigu, China
| | - Guoqing Cao
- Department of Animal Sciences and Veterinary Medicine, Shanxi Agricultural University, Taigu, China
| | - Bugao Li
- Department of Animal Sciences and Veterinary Medicine, Shanxi Agricultural University, Taigu, China
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Fonseca TG, Carriço T, Fernandes E, Abessa DMS, Tavares A, Bebianno MJ. Impacts of in vivo and in vitro exposures to tamoxifen: Comparative effects on human cells and marine organisms. ENVIRONMENT INTERNATIONAL 2019; 129:256-272. [PMID: 31146160 DOI: 10.1016/j.envint.2019.05.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Accepted: 05/06/2019] [Indexed: 06/09/2023]
Abstract
Tamoxifen (TAM) is a first generation-SERM administered for hormone receptor-positive (HER+) breast cancer in both pre- and post-menopausal patients and may undergo metabolic activation in organisms that share similar receptors and thus face comparable mechanisms of response. The present study aimed to assess whether environmental trace concentrations of TAM are bioavailable to the filter feeder M. galloprovincialis (100 ng L-1) and to the deposit feeder N. diversicolor (0.5, 10, 25 and 100 ng L-1) after 14 days of exposure. Behavioural impairment (burrowing kinetic), neurotoxicity (AChE activity), endocrine disruption by alkali-labile phosphate (ALP) content, oxidative stress (SOD, CAT, GPXs activities), biotransformation (GST activity), oxidative damage (LPO) and genotoxicity (DNA damage) were assessed. Moreover, this study also pertained to compare TAM cytotoxicity effects to mussels and targeted human (i.e. immortalized retinal pigment epithelium - RPE; and human transformed endothelial cells - HeLa) cell lines, in a range of concentrations from 0.5 ng L-1 to 50 μg L-1. In polychaetes N. diversicolor, TAM exerted remarkable oxidative stress and damage at the lowest concentration (0.5 ng L-1), whereas significant genotoxicity was reported at the highest exposure level (100 ng L-1). In mussels M. galloprovincialis, 100 ng L-1 TAM caused endocrine disruption in males, neurotoxicity, and an induction in GST activity and LPO byproducts in gills, corroborating in genotoxicity over the exposure days. Although cytotoxicity assays conducted with mussel haemocytes following in vivo exposure was not effective, in vitro exposure showed to be a feasible alternative, with comparable sensitivity to human cell line (HeLa).
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Affiliation(s)
- T G Fonseca
- CIMA, Centro de Investigação Marinha e Ambiental, Universidade do Algarve, Campus Gambelas, 8005-135 Faro, Portugal; NEPEA, Núcleo de Estudos em Poluição e Ecotoxicologia, Aquática, Universidade Estadual Paulista (UNESP), Campus do Litoral Paulista, São Vicente, SP 11330-900, Brazil
| | - T Carriço
- CIMA, Centro de Investigação Marinha e Ambiental, Universidade do Algarve, Campus Gambelas, 8005-135 Faro, Portugal
| | - E Fernandes
- CIMA, Centro de Investigação Marinha e Ambiental, Universidade do Algarve, Campus Gambelas, 8005-135 Faro, Portugal
| | - D M S Abessa
- NEPEA, Núcleo de Estudos em Poluição e Ecotoxicologia, Aquática, Universidade Estadual Paulista (UNESP), Campus do Litoral Paulista, São Vicente, SP 11330-900, Brazil
| | - A Tavares
- Departamento de Ciências Biomédicas e Medicina, Universidade do Algarve, Campus Gambelas, 8005-135 Faro, Portugal
| | - M J Bebianno
- CIMA, Centro de Investigação Marinha e Ambiental, Universidade do Algarve, Campus Gambelas, 8005-135 Faro, Portugal.
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7
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Sun X, Yan P, Zou C, Wong YK, Shu Y, Lee YM, Zhang C, Yang ND, Wang J, Zhang J. Targeting autophagy enhances the anticancer effect of artemisinin and its derivatives. Med Res Rev 2019; 39:2172-2193. [PMID: 30972803 DOI: 10.1002/med.21580] [Citation(s) in RCA: 64] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Revised: 03/07/2019] [Accepted: 03/16/2019] [Indexed: 12/12/2022]
Abstract
Artemisinin and its derivatives, with their outstanding clinical efficacy and safety, represent the most effective and impactful antimalarial drugs. Apart from its antimalarial effect, artemisinin has also been shown to exhibit selective anticancer properties against multiple cancer types both in vitro and in vivo. Specifically, our previous studies highlighted the therapeutic effects of artemisinin on autophagy regulation. Autophagy is a well-conserved degradative process that recycles cytoplasmic contents and organelles in lysosomes to maintain cellular homeostasis. The deregulation of autophagy is often observed in cancer cells, where it contributes to tumor adaptation to nutrient-deficient tumor microenvironments. This review discusses recent advances in the anticancer properties of artemisinin and its derivatives via their regulation of autophagy, mitophagy, and ferritinophagy. In particular, we will discuss the mechanisms of artemisinin activation in cancer and novel findings regarding the role of artemisinin in regulating autophagy, which involves changes in multiple signaling pathways. More importantly, with increasing failure rates and the high cost of the development of novel anticancer drugs, the strategy of repurposing traditional therapeutic Chinese medicinal agents such as artemisinin to treat cancer provides a more attractive alternative. We believe that the topics covered here will be important in demonstrating the potential of artemisinin and its derivatives as safe and potent anticancer agents.
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Affiliation(s)
- Xin Sun
- Department of Oncology, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou, China
| | - Peiyi Yan
- Department of Clinical Laboratory, Shanghai Putuo District People's Hospital, Shanghai, China
| | - Chang Zou
- Clinical Medical Research Center, The Second Clinical Medical College of Jinan University, The First Affiliated Hospital of Southern University, Shenzhen Public Service Platform on Tumor Precision Medicine and Molecular Diagnosis, Shenzhen People's Hospital, Shenzhen, China
| | - Yin-Kwan Wong
- Department of Pharmacology, Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Yuhan Shu
- College of Biomedical Engineering & Instrument Science, Zhejiang University, Hangzhou, China
| | - Yew Mun Lee
- Department of Pharmacology, Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Chongjing Zhang
- Institute of Material Medical, Peking Union Medical College, Beijing, China
| | - Nai-Di Yang
- Department of Pharmacology, Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Jigang Wang
- Clinical Medical Research Center, The Second Clinical Medical College of Jinan University, The First Affiliated Hospital of Southern University, Shenzhen Public Service Platform on Tumor Precision Medicine and Molecular Diagnosis, Shenzhen People's Hospital, Shenzhen, China.,Department of Pharmacology, Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.,Artemisinin Research Center, Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, China.,Key Laboratory of Cardio-Cerebrovascular Disease Prevention & Therapy, Gannan Medical University, Ganzhou, China
| | - Jianbin Zhang
- Department of Oncology, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou, China
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8
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Wang QQ, Zhai C, Wahafu A, Zhu YT, Liu YH, Sun LQ. Salvianolic acid B inhibits the development of diabetic peripheral neuropathy by suppressing autophagy and apoptosis. J Pharm Pharmacol 2018; 71:417-428. [PMID: 30537209 DOI: 10.1111/jphp.13044] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Accepted: 10/19/2018] [Indexed: 01/07/2023]
Abstract
OBJECTIVES The aim of this study was to evaluate the neuroprotective effects of SalB on high glucose (HG)-induced excessive autophagy and apoptosis in vitro. METHODS The proliferation and apoptosis of RSC96 cells were determined using the MTT assay and flow cytometry, respectively. Western blot analysis was performed to examine the expression of autophagy and apoptosis-related proteins. RT-PCR and flow cytometry were manipulated to examine the level of Bcl-2. The signals of autophagy markers were detected using immunofluorescence methods. KEY FINDINGS We found that HG significantly reduced RSC96 cell's proliferation and induced apoptosis. What's more, HG increased the level of autophagy and apoptosis-related proteins. However, these effects were reversed by SalB. In addition, we also found that 3-MA decreased the expression of LC3A/B and Beclin1, while the JNK inhibitor SP600125 reduced the levels of phosphorylated JNK, LC3A/B and Beclin1. CONCLUSIONS High glucose not only induced apoptosis but also caused autophagic cell death by activating the JNK pathway. These effects prevented by SalB in an opposite manner.
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Affiliation(s)
- Qian-Qian Wang
- Department of Traditional Chinese Medicine, the First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Cui Zhai
- Department of Respiration, the First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Alafate Wahafu
- Department of Neurosurgery, the First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Yan-Ting Zhu
- Department of Respiration, the First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Yong-Hui Liu
- Department of Traditional Chinese Medicine, the First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Lian-Qing Sun
- Department of Traditional Chinese Medicine, the First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
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Georgiadis G, Mavridis C, Belantis C, Zisis IE, Skamagkas I, Fragkiadoulaki I, Heretis I, Tzortzis V, Psathakis K, Tsatsakis A, Mamoulakis C. Nephrotoxicity issues of organophosphates. Toxicology 2018; 406-407:129-136. [PMID: 30063941 DOI: 10.1016/j.tox.2018.07.019] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2018] [Revised: 07/15/2018] [Accepted: 07/25/2018] [Indexed: 12/12/2022]
Abstract
Organophosphates are a large class of chemicals, initially invented in 1850 and since then they have been applied in numerous aspects of science to serve our purposes. Their mechanism of action in living organisms involves the irreversible inhibition of acetylcholinesterase, therefore they interfere with neuromuscular signal transmission. Due to the systematic and exaggerated use of these chemicals, there is massive exposure to them, hence there is great concern regarding the ramifications to all mammalian organisms. It has been widely accepted that over-exposure to organophosphates, has a deleterious impact on the renal tissue and subsequently on the renal function. Despite the significance of this global issue, limited knowledge exists, regarding the effect of these substances on our health. Therefore, new and extensive research is required to expand our knowledge and ensure proper guidance regarding the use of organophosphates as well the protection against their detrimental consequences. The aim of this review is to negotiate the effect of organophosphate exposure on renal tissue and kidney function.
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Affiliation(s)
- G Georgiadis
- Department of Urology, University General Hospital of Heraklion, University of Crete, Medical School, Heraklion, Crete, Greece
| | - C Mavridis
- Department of Urology, University General Hospital of Heraklion, University of Crete, Medical School, Heraklion, Crete, Greece
| | - C Belantis
- Department of Urology, University General Hospital of Heraklion, University of Crete, Medical School, Heraklion, Crete, Greece
| | - I E Zisis
- Department of Urology, University General Hospital of Heraklion, University of Crete, Medical School, Heraklion, Crete, Greece
| | - I Skamagkas
- Department of Urology, University General Hospital of Heraklion, University of Crete, Medical School, Heraklion, Crete, Greece
| | - I Fragkiadoulaki
- Department of Urology, University General Hospital of Heraklion, University of Crete, Medical School, Heraklion, Crete, Greece; Department of Forensic Sciences and Toxicology, University of Crete, Medical School, Heraklion, Crete, Greece
| | - I Heretis
- Department of Urology, University General Hospital of Heraklion, University of Crete, Medical School, Heraklion, Crete, Greece
| | - V Tzortzis
- Department of Urology, University of Thessaly, Larissa, Greece
| | - K Psathakis
- Department of Forensic Sciences and Toxicology, University of Crete, Medical School, Heraklion, Crete, Greece
| | - A Tsatsakis
- Department of Forensic Sciences and Toxicology, University of Crete, Medical School, Heraklion, Crete, Greece.
| | - C Mamoulakis
- Department of Urology, University General Hospital of Heraklion, University of Crete, Medical School, Heraklion, Crete, Greece
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Sui C, Zhuang C, Sun D, Yang L, Zhang L, Song L. Notch1 regulates the JNK signaling pathway and increases apoptosis in hepatocellular carcinoma. Oncotarget 2018; 8:45837-45847. [PMID: 28507277 PMCID: PMC5542231 DOI: 10.18632/oncotarget.17434] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Accepted: 04/11/2017] [Indexed: 12/11/2022] Open
Abstract
Notch1-induced pathways are involved in cell growth, apoptosis, motility, and invasion in many cancers. In the present study, the expression of Notch1 and NICD1 was detected in hepatocellular carcinoma (HCC) tissues using in-vitro assays. And then, we explored cell biology and signaling pathways using Notch1 siRNA or plasmids. Here, the expression of Notch1 and NICD1 was significantly decreased in HCC tissues. In-vitro, Notch1 plasmids inhibited cell proliferation, migration and invasion, but enhanced apoptosis of HepG2 and Hep3B cells. Conversely, si-Notch1 enhanced cell proliferation, migration and invasion, but inhibited apoptosis of HepG2 and Hep3B cells. Mechanically, Notch1 decreased the expression of cyclin D1, MMP-9 and Bcl-2, but increased the expression of p-JNK, Bax and cleaved caspase 3 in HepG2 and Hep3B cells. Besides, si-JNK or JNK inhibitor SP600125 affected the activation of Notch1 signaling pathway, and prevents cell apoptosis. In conclusion, Notch1 regulates the JNK signaling pathway and increases apoptosis in HCC. Because patients with HCC have a poor prognosis, Notch1 pathway may provide a novel treatment strategy.
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Affiliation(s)
- Chengxu Sui
- Department of Interventional Therapy, The Second Affiliated Hospital of Dalian Medical University, Dalian, 116027, Liaoning, China
| | - Chengjun Zhuang
- Department of Intensive Care Unit, The Second Affiliated Hospital of Dalian Medical University, Dalian, 116027, Liaoning, China
| | - Deguang Sun
- Department of Hepatobiliary Surgery, The Second Affiliated Hospital of Dalian Medical University, Dalian, 116027, Liaoning, China
| | - Li Yang
- Department of Intensive Care Unit, The Second Affiliated Hospital of Dalian Medical University, Dalian, 116027, Liaoning, China
| | - Liang Zhang
- Department of Interventional Therapy, The Second Affiliated Hospital of Dalian Medical University, Dalian, 116027, Liaoning, China
| | - Lei Song
- Department of Interventional Therapy, The Second Affiliated Hospital of Dalian Medical University, Dalian, 116027, Liaoning, China
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11
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Wang X, Liu Y, Wu R, Guo F, Zhang L, Cui M, Wu X, Zhang Y, Liu W. Role of ubenimex as an anticancer drug and its synergistic effect with Akt inhibitor in human A375 and A2058 cells. Onco Targets Ther 2018; 11:943-953. [PMID: 29503569 PMCID: PMC5826084 DOI: 10.2147/ott.s157480] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Background Malignant melanoma (MM) is a malignant tumor produced by changes in melanocytes in the skin or other organs. In the classification of skin tumor mortality, skin melanoma ranks the highest. Ubenimex, an Aminopeptidase N (APN) inhibitor, is now widely used for cancer as an adjunct therapy, conferring antitumor effects. Apoptosis and the induction of autophagy have both been found to be closely associated with tumor cell death. Methods In this study, the A375 and A2058 cell lines were treated with ubenimex. Cell viability was measured using the Cell Counting Kit 8 assay. Apoptosis and autophagic cell death were assessed using flow cytometry and acridine orange/ethidium bromide staining. Protein expression was assessed by Western blot analyses and immunofluorescence. Matrigel invasion and migration assays were used to examine the metastatic ability of melanoma cells. Results The results revealed that ubenimex inhibited the expression of APN in melanoma cells, which may be connected with the inhibition of metastasis. In addition, it increased melanoma cell death by inducing apoptosis and autophagic cell death. This effect was accompanied by increased levels of p-JNK. Moreover, treatment with ubenimex induced protective Akt activation, and combined use of an Akt inhibitor with ubenimex provided a better effect for inducing tumor cell death. Conclusion As an effective anti-tumor drug in vitro, ubenimex might be an excellent adjunctive therapy for the treatment of melanoma, with greater effects when combined with the use of an Akt inhibitor.
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Affiliation(s)
- Xiaoqing Wang
- Department of Pediatric Surgery, Shandong Provincial Hospital affiliated to Shandong University, Jinan, People's Republic of China
| | - Yang Liu
- Department of Pediatric Surgery, Shandong Provincial Hospital affiliated to Shandong University, Jinan, People's Republic of China
| | - Rongde Wu
- Department of Pediatric Surgery, Shandong Provincial Hospital affiliated to Shandong University, Jinan, People's Republic of China
| | - Feng Guo
- Department of Pediatric Surgery, Shandong Provincial Hospital affiliated to Shandong University, Jinan, People's Republic of China
| | - Lijuan Zhang
- Department of Pediatric Surgery, Shandong Provincial Hospital affiliated to Shandong University, Jinan, People's Republic of China
| | - Mingyu Cui
- Department of Pediatric Surgery, Shandong Provincial Hospital affiliated to Shandong University, Jinan, People's Republic of China
| | - Xiangyu Wu
- Department of Pediatric Surgery, Shandong Provincial Hospital affiliated to Shandong University, Jinan, People's Republic of China
| | - Yongfei Zhang
- Department of Dermatology, Shandong Provincial Qianfoshan Hospital affiliated to Shandong University, Jinan, People's Republic of China
| | - Wei Liu
- Department of Pediatric Surgery, Shandong Provincial Hospital affiliated to Shandong University, Jinan, People's Republic of China
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12
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Characteristics of Mel Ibr Melanoma Line Subclone after Treatment with Chicken Embryo Extract. Bull Exp Biol Med 2017; 163:255-259. [PMID: 28726209 DOI: 10.1007/s10517-017-3778-y] [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: 04/20/2016] [Indexed: 10/19/2022]
Abstract
We continue analysis of the phenotype of human melanoma cell Mel Ibr subclone obtained previously by treatment of the parental cell line by chicken embryo extract. The present study is focused on detection of markers of epithelial-mesenchymal transition that determine enhanced metastatic and invasive potential of malignant tumors of various locations. Analysis of the expression of E-cadherin and vimentin genes in the subclone and parental cells detected activation of epithelial-mesenchymal transition in the subclone. Immunological markers CD90, CD271, and CD95 were present in the parental population, but were not detected on the subclone cells. In contrast to the parental line, cells of the analyzed subclone retain viability in serum-free medium and formed vessel-like structures characteristic of vasculogenic mimicry.
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13
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Zhu X, Zhou M, Liu G, Huang X, He W, Gou X, Jiang T. Autophagy activated by the c-Jun N-terminal kinase-mediated pathway protects human prostate cancer PC3 cells from celecoxib-induced apoptosis. Exp Ther Med 2017; 13:2348-2354. [PMID: 28565848 PMCID: PMC5443255 DOI: 10.3892/etm.2017.4287] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2016] [Accepted: 02/03/2017] [Indexed: 12/23/2022] Open
Abstract
The aim of the present study was to investigate the role of autophagy in celecoxib-induced apoptosis in human hormone-insensitive prostate cancer cell line PC3 cells and to explore the underlying molecular mechanism leading to autophagic activation. A cell viability assay was applied to investigate the effect of various concentrations of celecoxib (0, 40, 60, 80, 100 and 120 µmol/l) on PC3 cells for 24 and 48 h, respectively. The 50% inhibitory concentration of celecoxib for 24 h was chosen for subsequent experiments. Annexin V-fluorescein isothiocyanate/propidium iodide double staining flow cytometry, as well as caspase 3 and poly (ADP-ribose) polymerase proteins detected by western blotting, were applied to analyze cellular apoptosis induced by celecoxib. Ultrastructural cellular changes observed by transmission electron microscopy and the level of LC-3 II and P62 detected by western blotting were used to determine the activation of autophagy. It was demonstrated that celecoxib induced apoptosis and activated autophagy in PC3 cells in a dose- and time-dependent manner. Furthermore, flow cytometry and western blotting were applied to elucidate whether the role of autophagy in celecoxib-induced apoptosis is protective or destructive. Blockade of autophagy markedly increased apoptosis, suggesting that celecoxib-activated autophagy was cytoprotective. Additionally, c-jun-N-terminal kinase (JNK) was demonstrated to have a role in autophagic activation, and suppression of JNK was able to reduce autophagy and increase apoptosis. In conclusion, the results of the present study indicate that celecoxib induces apoptosis in PC3 cells; however, celecoxib also activates JNK-mediated autophagy, which exerts cytoprotective effects in prostate cancer PC3 cells. Blockade of autophagy via the JNK-mediated pathway may provide a promising strategy for prostate cancer therapy.
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Affiliation(s)
- Xin Zhu
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P.R. China
| | - Mi Zhou
- Department of Respiratory Medicine, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P.R. China
| | - Guanyu Liu
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P.R. China.,Department of Molecular Oncology and Epigenetics, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P.R. China
| | - Xiaolong Huang
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P.R. China.,Department of Molecular Oncology and Epigenetics, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P.R. China
| | - Weiyang He
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P.R. China
| | - Xin Gou
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P.R. China
| | - Tao Jiang
- Department of Respiratory Medicine, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P.R. China
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Campoy FJ, Vidal CJ, Muñoz-Delgado E, Montenegro MF, Cabezas-Herrera J, Nieto-Cerón S. Cholinergic system and cell proliferation. Chem Biol Interact 2016; 259:257-265. [PMID: 27083142 DOI: 10.1016/j.cbi.2016.04.014] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2016] [Revised: 04/05/2016] [Accepted: 04/08/2016] [Indexed: 12/31/2022]
Abstract
The cholinergic system, comprising acetylcholine, the proteins responsible for acetylcholine synthesis and release, acetylcholine receptors and cholinesterases, is expressed by most human cell types. Acetylcholine is a neurotransmitter, but also a local signalling molecule which regulates basic cell functions, and cholinergic responses are involved in cell proliferation and apoptosis. So, activation of nicotinic and muscarinic receptors has a proliferative and anti-apoptotic effect in many cells. The content of choline acetyltransferase, acetylcholine receptors and cholinesterases is altered in many tumours, and cholinesterase content correlates with patient survival in some cancers. During apoptosis, acetylcholinesterase is induced and appears in the nuclei. Acetylcholinesterase participates in the regulation of cell proliferation and apoptosis through hydrolysis of acetylcholine and by other catalytic and non catalytic mechanisms, in a variant-specific manner. This review gathers information on the role of cholinergic system and specially acetylcholinesterase in cell proliferation and apoptosis.
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Affiliation(s)
- F J Campoy
- Departamento de Bioquímica y Biología Molecular-A, Universidad de Murcia, IMIB, Regional Campus of International Excellence "Campus Mare Nostrum", E-30071 Murcia, Spain.
| | - C J Vidal
- Departamento de Bioquímica y Biología Molecular-A, Universidad de Murcia, IMIB, Regional Campus of International Excellence "Campus Mare Nostrum", E-30071 Murcia, Spain
| | - E Muñoz-Delgado
- Departamento de Bioquímica y Biología Molecular-A, Universidad de Murcia, IMIB, Regional Campus of International Excellence "Campus Mare Nostrum", E-30071 Murcia, Spain
| | - M F Montenegro
- Departamento de Bioquímica y Biología Molecular-A, Universidad de Murcia, IMIB, Regional Campus of International Excellence "Campus Mare Nostrum", E-30071 Murcia, Spain
| | - J Cabezas-Herrera
- Molecular Therapy and Biomarker Research Group, Clinical Analysis Service, University Hospital Virgen de la Arrixaca, IMIB-Arrixaca, E-30120 El Palmar, Murcia, Spain
| | - S Nieto-Cerón
- Molecular Therapy and Biomarker Research Group, Clinical Analysis Service, University Hospital Virgen de la Arrixaca, IMIB-Arrixaca, E-30120 El Palmar, Murcia, Spain
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15
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Xi Q, Gao N, Yang Y, Ye W, Zhang B, Wu J, Jiang G, Zhang X. Anticancer drugs induce hypomethylation of the acetylcholinesterase promoter via a phosphorylated-p38-DNMT1-AChE pathway in apoptotic hepatocellular carcinoma cells. Int J Biochem Cell Biol 2015; 68:21-32. [DOI: 10.1016/j.biocel.2015.08.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2015] [Revised: 08/17/2015] [Accepted: 08/17/2015] [Indexed: 10/23/2022]
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16
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MAPK/JNK signalling: a potential autophagy regulation pathway. Biosci Rep 2015; 35:BSR20140141. [PMID: 26182361 PMCID: PMC4613668 DOI: 10.1042/bsr20140141] [Citation(s) in RCA: 302] [Impact Index Per Article: 33.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2014] [Accepted: 03/17/2015] [Indexed: 01/07/2023] Open
Abstract
Autophagy refers to a lysosomal degradative pathway or a process of self-cannibalization. This pathway maintains nutrients levels for vital cellular functions during periods of starvation and it provides cells with survival advantages under various stress situations. However, the mechanisms responsible for the induction and regulation of autophagy are poorly understood. The c-Jun NH2-terminal kinase (JNK) signal transduction pathway functions to induce defence mechanisms that protect organisms against acute oxidative and xenobiotic insults. This pathway has also been repeatedly linked to the molecular events involved in autophagy regulation. The present review will focus on recent advances in understanding of the relationship between mitogen-activated protein kinase (MAPK)/JNK signalling and autophagic cell death.
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Castillo-González AC, Pelegrín-Hernández JP, Nieto-Cerón S, Madrona AP, Noguera JA, López-Moreno MF, Rodríguez-López JN, Vidal CJ, Hellín-Meseguer D, Cabezas-Herrera J. Unbalanced acetylcholinesterase activity in larynx squamous cell carcinoma. Int Immunopharmacol 2015; 29:81-6. [PMID: 26002584 DOI: 10.1016/j.intimp.2015.05.011] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2015] [Revised: 05/04/2015] [Accepted: 05/07/2015] [Indexed: 01/01/2023]
Abstract
Previous reports have demonstrated that a non-neuronal cholinergic system is expressed aberrantly in airways. A proliferative effect is exerted directly by cholinergic agonists through the activation of nicotinic and muscarinic receptors. In cancer, particularly those related with smoking, the mechanism through which tumour cells respond to aberrantly activated cholinergic signalling is a key question. Fifty paired pieces of larynx squamous cell carcinoma and adjacent non-cancerous tissue were compared in terms of their acetylcholinesterase activity (AChE). The AChE activity in non-cancerous tissues (0.248 ± 0.030 milliunits per milligram of wet tissue; mU/mg) demonstrates that upper respiratory tissues express sufficient AChE activity for controlling the level of acetylcholine (ACh). In larynx carcinomas, the AChE activity decreased to 0.157 ± 0.024 mU/mg (p=0.009). Larynx cancer patients exhibiting low ACh-degrading enzymatic activity had a significantly shorter overall survival (p=0.031). Differences in the mRNA levels of alternatively spliced AChE isoforms and molecular compositions were noted between glottic and supraglottic cancers. Our results suggest that the low AChE activity observed in larynx squamous cell carcinoma may be useful for predicting the outcome of patients.
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Affiliation(s)
- Ana Cristina Castillo-González
- Molecular Therapy and Biomarkers Research Group, Clinical Analysis Service, University Hospital Virgen de la Arrixaca, IMIB-Arrixaca, Ctra Madrid-Cartagena s/n, El Palmar, 30120 Murcia, Spain; Department of Biochemistry and Molecular Biology A, School of Biology, Regional Campus of International Excellence "Campus Mare Nostrum", University of Murcia, 30100 Murcia, Spain
| | - Juan Pablo Pelegrín-Hernández
- Otorhinolaryngology Surgical Service, University Hospital Virgen de la Arrixaca IMIB-Arrixaca, Ctra Madrid-Cartagena s/n, El Palmar, 30120 Murcia, Spain
| | - Susana Nieto-Cerón
- Molecular Therapy and Biomarkers Research Group, Clinical Analysis Service, University Hospital Virgen de la Arrixaca, IMIB-Arrixaca, Ctra Madrid-Cartagena s/n, El Palmar, 30120 Murcia, Spain
| | - Antonio Piñero Madrona
- Surgery Service of University Hospital Virgen de la Arrixaca IMIB, Ctra Madrid-Cartagena s/n, El Palmar, 30120 Murcia, Spain
| | - José Antonio Noguera
- Molecular Therapy and Biomarkers Research Group, Clinical Analysis Service, University Hospital Virgen de la Arrixaca, IMIB-Arrixaca, Ctra Madrid-Cartagena s/n, El Palmar, 30120 Murcia, Spain
| | - María Fuensanta López-Moreno
- Molecular Therapy and Biomarkers Research Group, Clinical Analysis Service, University Hospital Virgen de la Arrixaca, IMIB-Arrixaca, Ctra Madrid-Cartagena s/n, El Palmar, 30120 Murcia, Spain
| | - José Neptuno Rodríguez-López
- Surgery Service of University Hospital Virgen de la Arrixaca IMIB, Ctra Madrid-Cartagena s/n, El Palmar, 30120 Murcia, Spain
| | - Cecilio J Vidal
- Surgery Service of University Hospital Virgen de la Arrixaca IMIB, Ctra Madrid-Cartagena s/n, El Palmar, 30120 Murcia, Spain
| | - Diego Hellín-Meseguer
- Otorhinolaryngology Surgical Service, University Hospital Virgen de la Arrixaca IMIB-Arrixaca, Ctra Madrid-Cartagena s/n, El Palmar, 30120 Murcia, Spain.
| | - Juan Cabezas-Herrera
- Molecular Therapy and Biomarkers Research Group, Clinical Analysis Service, University Hospital Virgen de la Arrixaca, IMIB-Arrixaca, Ctra Madrid-Cartagena s/n, El Palmar, 30120 Murcia, Spain.
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18
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Castillo-González AC, Nieto-Cerón S, Pelegrín-Hernández JP, Montenegro MF, Noguera JA, López-Moreno MF, Rodríguez-López JN, Vidal CJ, Hellín-Meseguer D, Cabezas-Herrera J. Dysregulated cholinergic network as a novel biomarker of poor prognostic in patients with head and neck squamous cell carcinoma. BMC Cancer 2015; 15:385. [PMID: 25956553 PMCID: PMC4435806 DOI: 10.1186/s12885-015-1402-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2014] [Accepted: 04/29/2015] [Indexed: 01/03/2023] Open
Abstract
BACKGROUND In airways, a proliferative effect is played directly by cholinergic agonists through nicotinic and muscarinic receptors activation. How tumors respond to aberrantly activated cholinergic signalling is a key question in smoking-related cancer. This research was addressed to explore a possible link of cholinergic signalling changes with cancer biology. METHODS Fifty-seven paired pieces of head and neck squamous cell carcinoma (HNSCC) and adjacent non-cancerous tissue (ANCT) were compared for their mRNA levels for ACh-related proteins and ACh-hydrolyzing activity. RESULTS The measurement in ANCT of acetylcholinesterase (AChE) and butyrylcholinesterase (BChE) activities (5.416 ± 0.501 mU/mg protein and 6.350 ± 0.599 mU/mg protein, respectively) demonstrated that upper respiratory tract is capable of controlling the availability of ACh. In HNSCC, AChE and BChE activities dropped to 3.584 ± 0.599 mU/mg protein (p = 0.002) and 3.965 ± 0.423 mU/mg protein (p < 0.001). Moreover, tumours with low AChE activity and high BChE activity were associated with shorter patient overall survival. ANCT and HNSCC differed in mRNA levels for AChE-T, α3, α5, α9 and β2 for nAChR subunits. Tobacco exposure had a great impact on the expression of both AChE-H and AChE-T mRNAs. Unaffected and cancerous pieces contained principal AChE dimers and BChE tetramers. The lack of nerve-born PRiMA-linked AChE agreed with pathological findings on nerve terminal remodelling and loss in HNSCC. CONCLUSIONS Our results suggest that the low AChE activity in HNSCC can be used to predict survival in patients with head and neck cancer. So, the ChE activity level can be used as a reliable prognostic marker.
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Affiliation(s)
- Ana Cristina Castillo-González
- Molecular Therapy and Biomarkers Research Group, Clinical Analysis Service, University Hospital Virgen de la Arrixaca, IMIB-Arrixaca, Ctra Madrid-Cartagena s/n, El Palmar, Murcia, 30120, Spain.
| | - Susana Nieto-Cerón
- Molecular Therapy and Biomarkers Research Group, Clinical Analysis Service, University Hospital Virgen de la Arrixaca, IMIB-Arrixaca, Ctra Madrid-Cartagena s/n, El Palmar, Murcia, 30120, Spain.
| | - Juan Pablo Pelegrín-Hernández
- Otorhinolaryngology Surgical Service, University Hospital Virgen de la Arrixaca IMIB-Arrixaca, Ctra Madrid-Cartagena s/n, El Palmar, Murcia, 30120, Spain.
| | - María Fernanda Montenegro
- Department of Biochemistry and Molecular Biology A, School of Biology, Regional Campus of International Excellence "Campus Mare Nostrum", IMIB-University of Murcia, Murcia, 30100, Spain.
| | - José Antonio Noguera
- Molecular Therapy and Biomarkers Research Group, Clinical Analysis Service, University Hospital Virgen de la Arrixaca, IMIB-Arrixaca, Ctra Madrid-Cartagena s/n, El Palmar, Murcia, 30120, Spain.
| | - María Fuensanta López-Moreno
- Molecular Therapy and Biomarkers Research Group, Clinical Analysis Service, University Hospital Virgen de la Arrixaca, IMIB-Arrixaca, Ctra Madrid-Cartagena s/n, El Palmar, Murcia, 30120, Spain.
| | - José Neptuno Rodríguez-López
- Department of Biochemistry and Molecular Biology A, School of Biology, Regional Campus of International Excellence "Campus Mare Nostrum", IMIB-University of Murcia, Murcia, 30100, Spain.
| | - Cecilio J Vidal
- Department of Biochemistry and Molecular Biology A, School of Biology, Regional Campus of International Excellence "Campus Mare Nostrum", IMIB-University of Murcia, Murcia, 30100, Spain.
| | - Diego Hellín-Meseguer
- Otorhinolaryngology Surgical Service, University Hospital Virgen de la Arrixaca IMIB-Arrixaca, Ctra Madrid-Cartagena s/n, El Palmar, Murcia, 30120, Spain.
| | - Juan Cabezas-Herrera
- Molecular Therapy and Biomarkers Research Group, Clinical Analysis Service, University Hospital Virgen de la Arrixaca, IMIB-Arrixaca, Ctra Madrid-Cartagena s/n, El Palmar, Murcia, 30120, Spain.
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Xi HJ, Wu RP, Liu JJ, Zhang LJ, Li ZS. Role of acetylcholinesterase in lung cancer. Thorac Cancer 2015; 6:390-8. [PMID: 26273392 PMCID: PMC4511315 DOI: 10.1111/1759-7714.12249] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2015] [Accepted: 02/07/2015] [Indexed: 12/14/2022] Open
Abstract
Acetylcholinesterase (AChE) plays a key role in catalytic hydrolysis of cholinergic neurotransmitters. Intensive research has proven the involvement of this protein in novel functions, such as cell adhesion, differentiation, and proliferation. In addition, several recent studies have indicated that acetylcholinesterase is potentially a marker and regulator of apoptosis. Importantly, AChE is also a promising tumor suppressor. In this review, we briefly summarize the involvement of AChE in apoptosis and cancer, focusing on the role of AChE in lung cancer, as well as the therapeutic consideration of AChE for cancer therapy.
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Affiliation(s)
- Hui-Jun Xi
- Digestive Endoscopy Center, Changhai Hospital, Second Military Medical University Shanghai, China
| | - Ren-Pei Wu
- Digestive Endoscopy Center, Changhai Hospital, Second Military Medical University Shanghai, China
| | - Jing-Jing Liu
- School of Nursing, Second Military Medical University Shanghai, China
| | - Ling-Juan Zhang
- Department of Nursing, Changhai Hospital, Second Military Medical University Shanghai, China
| | - Zhao-Shen Li
- Digestive Endoscopy Center, Changhai Hospital, Second Military Medical University Shanghai, China ; Department of Gastroenterology, Changhai Hospital, Second Military Medical University Shanghai, China
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Ye X, Zhang C, Chen Y, Zhou T. Upregulation of Acetylcholinesterase Mediated by p53 Contributes to Cisplatin-Induced Apoptosis in Human Breast Cancer Cell. J Cancer 2015; 6:48-53. [PMID: 25553088 PMCID: PMC4278914 DOI: 10.7150/jca.10521] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2014] [Accepted: 10/21/2014] [Indexed: 11/05/2022] Open
Abstract
BACKGROUND The expression of acetylcholinesterase (AChE) could be induced during apoptosis in various cell types. And reduced AChE expression either by siRNA could prevent apoptosis. However, the detailed mechanisms underlying the AChE regulation are largely unknown in human breast cancer cell. MATERIAL AND METHODS MCF-7 cells were cultured and treated by cisplatin in the absence or presence of p53 siRNA. RESULTS In this study, the regulation of AChE expression during apoptosis induced by cisplatin, a current used anticancer drug, was investigated in human breast cancer cell line MCF-7. Exposure of MCF-7 cells to cisplatin resulted in apoptosis in a time- and concentration-dependent manner. Meanwhile, the upregulated AChE and p53 were also observed during apoptosis. Silencing interfering RNA directed against p53 blocked the expression of AChE. CONCLUSION Taken together, these results suggested that AChE expression could be upregulated by the activation of p53 during apoptosis induced by cisplatin in MCF-7 cells.
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Affiliation(s)
- Xiaolei Ye
- 1. Ningbo Institute of Medical Sciences, Ningbo 315020, China
| | - Changsong Zhang
- 2. Clinical Oncology Laboratory, Changzhou Cancer Hospital of Soochow University, Changzhou 213002, China
| | - Yichen Chen
- 1. Ningbo Institute of Medical Sciences, Ningbo 315020, China
| | - Tianbao Zhou
- 3. The Hepatobiliary Surgery Centre, the Ningbo No. 2 Hospital, Ningbo 315010, China
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Feedback loops blockade potentiates apoptosis induction and antitumor activity of a novel AKT inhibitor DC120 in human liver cancer. Cell Death Dis 2014; 5:e1114. [PMID: 24625973 PMCID: PMC3973233 DOI: 10.1038/cddis.2014.43] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2013] [Revised: 12/22/2013] [Accepted: 01/17/2014] [Indexed: 12/20/2022]
Abstract
The serine/threonine kinase AKT is generally accepted as a promising anticancer therapeutic target. However, the relief of feedback inhibition and enhancement of other survival pathways often attenuate the anticancer effects of AKT inhibitors. These compensatory mechanisms are very complicated and remain poorly understood. In the present study, we found a novel 2-pyrimidyl-5-amidothiazole compound, DC120, as an ATP competitive AKT kinase inhibitor that suppressed proliferation and induced apoptosis in liver cancer cells both in vitro and in vivo. DC120 blocked the phosphorylation of downstream molecules in the AKT signal pathway in dose- and time-dependent manners both in vitro and in vivo. However, unexpectedly, DC120 activated mammalian target of rapamycin complex 1 (mTORC1) pathway that was suggested by increased phosphorylation of 70KD ribosomal protein S6 kinase (P70S6K) and eukaryotic translation initiation factor 4E binding protein 1 (4E-BP1). The activated mTORC1 signal was because of increase of intracellular Ca(2+) via Ca(2+)/calmodulin (CaM)/ signaling to human vacuolar protein sorting 34 (hVps34) upon AKT inhibition. Meanwhile, DC120 attenuated the inhibitory effect of AKT on CRAF by decreasing phosphorylation of CRAF at Ser259 and thus activated the mitogen-activated protein kinase (MAPK) pathway. The activation of the mTORC1 and MAPK pathways by DC120 was not mutually dependent, and the combination of DC120 with mTORC1 inhibitor and/or MEK inhibitor induced significant apoptosis and growth inhibition both in vitro and in vivo. Taken together, the combination of AKT, mTORC1 and/or MEK inhibitors would be a promising therapeutic strategy for liver cancer treatment.
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Jia G, Kong R, Ma ZB, Han B, Wang YW, Pan SH, Li YH, Sun B. The activation of c-Jun NH₂-terminal kinase is required for dihydroartemisinin-induced autophagy in pancreatic cancer cells. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2014; 33:8. [PMID: 24438216 PMCID: PMC3901759 DOI: 10.1186/1756-9966-33-8] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/04/2013] [Accepted: 01/17/2014] [Indexed: 11/21/2022]
Abstract
Background c-Jun NH2-terminal kinases (JNKs) are strongly activated by a stressful cellular environment, such as chemotherapy and oxidative stress. Autophagy is a protein-degradation system in which double-membrane vacuoles called autophagosomes are formed. The autophagy-related gene Beclin 1 plays a key role in this process. We previously found that autophagy was induced by dihydroartemisinin (DHA) in pancreatic cancer cells. However, little is known about the complex relationship between ROS, JNK activation, autophagy induction, and Beclin 1 expression. Methods Cell viability and CCK-8 assays were carried out to determine the cell proliferation; small interfering RNAs (siRNAs) were used to knockdown c-Jun NH2-terminal kinases (JNK1/2) genes; western blot was performed to detect the protein expression of LC3, JNK, Beclin 1, caspase 3 and β-actin; production of intracellular ROS was analyzed using FACS flow cytometry; autophagy induction was confirmed by electron microscopy. Results In the present study, we explored the role of DHA and Beclin 1 expression in autophagy. DHA-treated cells showed autophagy characteristics, and DHA also activated the JNK pathway and up-regulated the expression of Beclin 1. Conversely, blocking JNK signaling inhibited Beclin 1 up-regulation. JNK activation was found to primarily depend on reactive oxygen species (ROS) resulting from the DHA treatment. Moreover, JNK pathway inhibition and Beclin 1 silencing prevented the induction of DHA-induced autophagy. Conclusions These results suggest that the induction of autophagy by DHA is required for JNK-mediated Beclin 1 expression.
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Affiliation(s)
| | | | | | | | | | | | | | - Bei Sun
- Department of Pancreatic and Biliary Surgery; Key Laboratory of Hepatosplenic Surgery, the First Affiliated Hospital of Harbin Medical University, Harbin, China.
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Qin J, Tang J, Jiao L, Ji J, Chen WD, Feng GK, Gao YH, Zhu XF, Deng R. A diterpenoid compound, excisanin A, inhibits the invasive behavior of breast cancer cells by modulating the integrin β1/FAK/PI3K/AKT/β-catenin signaling. Life Sci 2013; 93:655-63. [DOI: 10.1016/j.lfs.2013.09.002] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2013] [Revised: 08/27/2013] [Accepted: 09/04/2013] [Indexed: 11/26/2022]
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Shan C, Tan JH, Ou TM, Huang ZS. Natural products and their derivatives as G-quadruplex binding ligands. Sci China Chem 2013. [DOI: 10.1007/s11426-013-4920-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Dual phosphoinositide 3-kinase/mammalian target of rapamycin inhibitor NVP-BEZ235 has a therapeutic potential and sensitizes cisplatin in nasopharyngeal carcinoma. PLoS One 2013; 8:e59879. [PMID: 23533654 PMCID: PMC3606339 DOI: 10.1371/journal.pone.0059879] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2012] [Accepted: 02/19/2013] [Indexed: 12/20/2022] Open
Abstract
Phosphoinositide 3-kinase (PI3K)/AKT/mammalian target of rapamycin inhibitor (mTOR) pathway is often constitutively activated in human tumor cells and thus has been considered as a promising drug target. To ascertain a therapeutical approach of nasopharyngeal carcinoma (NPC), we hypothesized NVP-BEZ235, a novel and potent imidazo[4,5-c] quinolone derivative, that dually inhibits both PI3K and mTOR kinases activities, had antitumor activity in NPC. Expectedly, we found that NVP-BEZ235 selectively inhibited proliferation of NPC cells rather than normal nasopharyngeal cells using MTT assay. In NPC cell lines, with the extended exposure, NVP-BEZ235 selectively inhibited proliferation of NPC cells harboring PIK3CA mutation, compared to cells with wild-type PIK3CA. Furthermore, exposure of NPC cells to NVP-BEZ235 resulted in G1 growth arrest by Propidium iodide uptake assay, reduction of cyclin D1and CDK4, and increased levels of P27 and P21 by Western blotting, but negligible apoptosis. Moreover, we found that cisplatin (CDDP) activated PI3K/AKT and mTORC1 pathways and NVP-BEZ235 alleviated the activation by CDDP through dually targeting PI3K and mTOR kinases. Also, NVP-BEZ235 combining with CDDP synergistically inhibited proliferation and induced apoptosis in NPC cells. In CNE2 and HONE1 nude mice xenograft models, orally NVP-BEZ235 efficiently attenuated tumor growth with no obvious toxicity. In combination with NVP-BEZ235 and CDDP, there was dramatic synergy in shrinking tumor volumes and inducing apoptosis through increasing Noxa, Bax and decreasing Mcl-1, Bcl-2. Based on the above results, NVP-BEZ235, which has entered phase I/II clinical trials in patients with advanced solid tumors, has a potential as a monotherapy or in combination with CDDP for NPC treatment.
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Yang F, Chen WD, Deng R, Zhang H, Tang J, Wu KW, Li DD, Feng GK, Lan WJ, Li HJ, Zhu XF. Hirsutanol A, a novel sesquiterpene compound from fungus Chondrostereum sp., induces apoptosis and inhibits tumor growth through mitochondrial-independent ROS production: hirsutanol A inhibits tumor growth through ROS production. J Transl Med 2013; 11:32. [PMID: 23394457 PMCID: PMC3637523 DOI: 10.1186/1479-5876-11-32] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2012] [Accepted: 01/21/2013] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND Hirsutanol A is a novel sesquiterpene compound purified from fungus Chondrostereum sp. in Sarcophyton tortuosum. Our previous studies had demonstrated that hirsutanol A exhibited potent cytotoxic effect on many kinds of cancer cell lines. In the current study, the antitumor activity of hirsutanol A and its molecular mechanisms were investigated. METHODS Hirsutanol A induced growth inhibition and apoptotic cell death of human colon cancer SW620 cells and human breast cancer MDA-MB-231cells were determined using MTT assay and flow cytometry assay, respectively. The effect of hirsutanol A on intrinsic ROS level and change in mitochondrial membrane potential (△ψm) of different cell lines were also measured by flow cytometry assay. The function of JNK was compromised by JNK siRNA or JNK inhibitor SP600125. The expression of cytochrome c, p-JNK, p-c-Jun after treatment with hirsutanol A were detected by Western blot analysis. Finally, the in vivo anti-tumor effect of hirsutanol A was examined in human cancer cell SW620 xenograft model. RESULTS The results showed that hirsutanol A significantly induced apoptosis, mitochondrial-independent increase of Reactive Oxygen Species (ROS) level, change of mitochondrial membrane potential, release of cytochrome c in human cancer cells. Preventing increase of ROS level using the potent antioxidant N-acetyl-L-cysteine (NAC) markedly decreased hirsutanol A-induced apoptosis. In addition, JNK signaling pathway was activated by hirsutanol A through elevating ROS level. Blockade of JNK signaling pathway by JNK specific inhibitor SP600125 enhanced apoptosis and hirsutanol A-induced ROS accumulation. Also, hirsutanol A exhibited antitumor activity in human cancer cell SW620 xenograft model. CONCLUSION These data suggested that hirsutanol A inhibited tumor growth through triggering ROS production and apoptosis.
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Affiliation(s)
- Fen Yang
- State Key Laboratory of Oncology in South China, Cancer Center, Sun Yat-Sen University, 651 Dongfeng Road East, Guangzhou 510060, China
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Yang F, Chen WD, Deng R, Li DD, Wu KW, Feng GK, Li HJ, Zhu XF. Hirsutanol A induces apoptosis and autophagy via reactive oxygen species accumulation in breast cancer MCF-7 cells. J Pharmacol Sci 2012; 119:214-20. [PMID: 22786562 DOI: 10.1254/jphs.11235fp] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
Abstract
Hirsutanol A is a novel sesquiterpene compound purified from the marine fungus Chondrostereum sp in the coral Sarcophyton tortuosum. Our previous studies had demonstrated that hirsutanol A exerted potent cytotoxic effect in many kinds of cancer cell lines. Here, the anticancer molecular mechanisms of hirsutanol A were investigated in breast cancer MCF-7 cells. The results showed that hirsutanol A could inhibit cell proliferation, elevate reactive oxygen species (ROS) level, and induce apoptosis and autophagy. Co-treatment with the potent antioxidant agent N-acetyl-L-cysteine could effectively reverse the effect of enhanced ROS production, which in turn, reduces growth inhibition, apoptosis, and autophagy mediated by hirsutanol A. In addition, blocking autophagy by bafilomycin A1 or Atg7-siRNA could synergistically enhance the antiproliferative effect and apoptosis induced by hirsutanol A. These data suggested that hirsutanol A could induce apoptosis and autophagy via accumulation of ROS and co-treatment with an autophagy inhibitor could sensitize MCF-7 cells to hirsutanol A.
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Affiliation(s)
- Fen Yang
- State Key Laboratory of Oncology in South China, Cancer Center, Sun Yat-Sen University, Guangzhou, 510060, China
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Masha'our RS, Heinrich R, Garzozi HJ, Perlman I. Acetylcholinesterase (AChE) is an important link in the apoptotic pathway induced by hyperglycemia in Y79 retinoblastoma cell line. Front Mol Neurosci 2012; 5:69. [PMID: 22685426 PMCID: PMC3368359 DOI: 10.3389/fnmol.2012.00069] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2011] [Accepted: 05/14/2012] [Indexed: 01/26/2023] Open
Abstract
Acetylcholinesterase (AChE) expression was found to be induced in the mammalian CNS, including the retina, by different types of stress leading to cellular apoptosis. Here, we tested possible involvement of AChE in hyperglycemia-induced apoptosis in a retinal cell line. Y79 retinoblastoma cells were incubated in starvation media (1% FBS and 1 mg/ml glucose) for 16–24 h, and then exposed to hyperglycemic environment by raising extracellular glucose concentrations to a final level of 3.5 mg/ml or 6 mg/ml. Similar levels of mannitol were used as control for hyperosmolarity. Cells were harvested at different time intervals for analysis of apoptosis and AChE protein expression. Apoptosis was detected by the cleavage of Poly ADP-ribose polymerase (PARP) using western blot, and by Terminal deoxynucleotidyl-transferase-mediated dUTP nick-end-labeling (TUNEL) assay. AChE protein expression and activity was detected by western blot and by the Karnovsky and Roots method, respectively. MissionTM shRNA for AChE was used to inhibit AChE protein expression. Treating Y79 cells with 3.5 mg/ml of glucose, but not with 3.5 mg/ml mannitol, induced apoptosis which was confirmed by TUNEL assay and by cleavage of PARP. A part of the signaling pathway accompanying the apoptotic process involved up-regulation of the AChE-R variant and an N-extended AChE variant as verified at the mRNA and protein level. Inhibition of AChE protein expression by shRNA protected Y79 cell from entering the apoptotic pathway. Our data suggest that expression of an N-extended AChE variant, most probably an R isoform, is involved in the apoptotic pathway caused by hyperglycemia in Y79 cells.
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Zhang XJ, Greenberg DS. Acetylcholinesterase involvement in apoptosis. Front Mol Neurosci 2012; 5:40. [PMID: 22514517 PMCID: PMC3322359 DOI: 10.3389/fnmol.2012.00040] [Citation(s) in RCA: 101] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2012] [Accepted: 03/18/2012] [Indexed: 01/22/2023] Open
Abstract
To date, more than 40 different types of cells from primary cultures or cell lines have shown AChE expression during apoptosis and after the induction apoptosis by different stimuli. It has been well-established that increased AChE expression or activity is detected in apoptotic cells after apoptotic stimuli in vitro and in vivo, and AChE could be therefore used as a marker of apoptosis. AChE is not an apoptosis initiator, but the cells in which AChE is overexpressed undergo apoptosis more easily than controls. Interestingly, cells with downregulated levels of AChE are not sensitive to apoptosis induction and AChE deficiency can protect against apoptosis. Some tumor cells do not express AChE, but when AChE is introduced into a tumor cell, the cells cease to proliferate and undergo apoptosis more readily. Therefore, AChE can be classified as a tumor suppressor gene. AChE plays a pivotal role in apoptosome formation, and silencing of the AChE gene prevents caspase-9 activation, with consequent decreased cell viability, nuclear condensation, and poly (adenosine diphosphate-ribose) polymerase cleavage. AChE is translocated into the nucleus, which may be an important event during apoptosis. Several questions still need to be addressed, and further studies that address the non-classical function of AChE in apoptosis are needed.
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Affiliation(s)
- Xue-Jun Zhang
- State Key Laboratory of Cell Biology, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences Shanghai, China
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Qin W, Lin ZM, Deng R, Li DD, Song Z, Tian YG, Wang RF, Ling JQ, Zhu XF. p38a MAPK is involved in BMP-2-induced odontoblastic differentiation of human dental pulp cells. Int Endod J 2011; 45:224-33. [DOI: 10.1111/j.1365-2591.2011.01965.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Sun T, Li D, Wang L, Xia L, Ma J, Guan Z, Feng G, Zhu X. c-Jun NH2-terminal kinase activation is essential for up-regulation of LC3 during ceramide-induced autophagy in human nasopharyngeal carcinoma cells. J Transl Med 2011; 9:161. [PMID: 21943220 PMCID: PMC3189397 DOI: 10.1186/1479-5876-9-161] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2010] [Accepted: 09/26/2011] [Indexed: 01/02/2023] Open
Abstract
Background Autophagy is a dynamic catabolic process characterized by the formation of double membrane vacuoles termed autophagosomes. LC3, a homologue of yeast Atg8, takes part in autophagosome formation, but the exact regulation mechanism of LC3 still needs to be elucidated. Methods Ceramide-induced autophagy was determined by detecting LC3 expression with Western blotting and confocal microscopy in human nasopharyngeal carcinoma cell lines CNE2 and SUNE1. The activation of JNK pathway was assessed by Western blotting for phospho-specific forms of JNK and c-Jun. The JNK activity specific inhibitor, SP600125, and siRNA directed against JNK were used to block JNK/c-Jun pathway. ChIP and luciferase reporter analysis were applied to determine whether c-Jun was involved in the regulation of LC3 transcription. Results Ceramide-treated cells exhibited the characteristics of autophagy and JNK pathway activation. Inhibition of JNK pathway could block the ceramide-induced autophagy and the up-regulation of LC3 expression. Transcription factor c-Jun was involved in LC3 transcription regulation in response to ceramide treatment. Conclusions Ceramide could induce autophagy in human nasopharyngeal carcinoma cells, and activation of JNK pathway was involved in ceramide-induced autophagy and LC3 expression.
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Affiliation(s)
- Ting Sun
- State Key Laboratory of Oncology in South China, Cancer Center, Sun Yat-Sen University, Guangzhou 510060, China
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Duysen EG, Lockridge O. Induction of plasma acetylcholinesterase activity in mice challenged with organophosphorus poisons. Toxicol Appl Pharmacol 2011; 255:214-20. [PMID: 21767560 DOI: 10.1016/j.taap.2011.06.021] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2011] [Revised: 06/03/2011] [Accepted: 06/24/2011] [Indexed: 11/16/2022]
Abstract
The restoration of plasma acetylcholinesterase activity in mice following inhibition by organophosphorus pesticides and nerve agents has been attributed to synthesis of new enzyme. It is generally assumed that activity levels return to normal, are stable and do not exceed the normal level. We have observed over the past 10 years that recovery of acetylcholinesterase activity levels in mice treated with organophosphorus agents (OP) exceeds pretreatment levels and remains elevated for up to 2 months. The most dramatic case was in mice treated with tri-cresyl phosphate and tri-ortho-cresyl phosphate, where plasma acetylcholinesterase activity rebounded to a level 250% higher than the pretreatment activity. The present report summarizes our observations on plasma acetylcholinesterase activity in mice treated with chlorpyrifos, chlorpyrifos oxon, diazinon, tri-ortho-cresyl phosphate, tri-cresyl phosphate, tabun thiocholine, parathion, dichlorvos, and diisopropylfluorophosphate. We have developed a hypothesis to explain the excess acetylcholinesterase activity, based on published observations. We hypothesize that acetylcholinesterase activity is induced when cells undergo apoptosis and that consequently there is a rise in the level of plasma acetylcholinesterase.
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Affiliation(s)
- Ellen G Duysen
- Eppley Institute, University of Nebraska Medical Center, Omaha, NE 68198-5950, USA
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Neuroactive Multifunctional Tacrine Congeners with Cholinesterase, Anti-Amyloid Aggregation and Neuroprotective Properties. Pharmaceuticals (Basel) 2011. [PMCID: PMC4053961 DOI: 10.3390/ph4020382] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Bodur E, Layer PG. Counter-regulation of cholinesterases: differential activation of PKC and ERK signaling in retinal cells through BChE knockdown. Biochimie 2010; 93:469-76. [PMID: 21094673 DOI: 10.1016/j.biochi.2010.10.020] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2010] [Accepted: 10/31/2010] [Indexed: 10/18/2022]
Abstract
The ubiquitous cholinesterase (ChE) enzymes, functioning in the termination of acetylcholine mediated neural transmission, are also reported to have additional functions. Through application of siRNAs against butyrylcholinesterase (BChE) in R28 cells, a retinal cell line with pluripotent properties, a counter-regulation between ChEs was revealed. BChE knock down resulted in an up-regulation of not only acetylcholinesterase (AChE), but also altered the signaling status of PKC and ERK. Knockdown of BChE modified ERK signaling most notably through ERK1/2 proteins, together with the transcription activator P90RSK1 and c-fos. Stimulation of the R28 cell line by forskolin revealed that ChEs are involved in an intricate cross talk between different signaling pathways. Forskolin-stimulated R28 cells displayed a robust cholinergic response, as detected by both electrophysiology and ChE expression, and changed the activation status of PKC/ERK signaling pathways. The findings in R28 cells show that ChE expressions are inversely co-regulated and act through the transcription factors c-fos and P90RSK1. Since R28 cells have the capacity to differentiate into different cell types through stimulation of signaling pathways, ChEs are likely to be associated with cell fate determination, rather than just terminating cholinergic responses.
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Affiliation(s)
- Ebru Bodur
- Hacettepe University, Faculty of Medicine, Department of Biochemistry, Sıhhiye, Ankara, Turkey.
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PKB/Akt promotes DSB repair in cancer cells through upregulating Mre11 expression following ionizing radiation. Oncogene 2010; 30:944-55. [PMID: 20956948 DOI: 10.1038/onc.2010.467] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
An elevated DNA-repair capacity in cancer cells leads to radiation resistance and severely limits the efficacy of radiation therapy. Activation of Akt is tightly associated with resistance to radiotherapy, and Mre11 protein has important role during the repair of DNA double-strand breaks (DSBs). In this report, our results showed that inhibition of Akt activity impaired the repair of DSBs in CNE2 cells, whereas activated Akt promoted the repair of DSBs in HeLa cells. Knockdown of Mre11 also impaired the process of DSB repair in both these two cell lines. More importantly, we found that Akt could regulate Mre11 expression. Inhibition of Akt activity by small interfering RNA or LY294002 efficiently downregulated the Mre11 expression in CNE2 cells, and transfection with myr-Akt plasmid in HeLa cells upregulated the Mre11 expression. In addition, luciferase reporter analysis revealed that Mre11 reporter activity increased after transfection with myr-Akt1 plasmids, and this myr-Akt1-induced transcriptional activity was blocked in the presence of LY294002. Further study showed GSK3β/β-catenin/LEF-1 pathway was involved in this regulation. Knockdown of β-catenin or LEF-1 led to the downregulation of Mre11, whereas overexpression of β-catenin led to upregulation of Mre11. The chromatin immunoprecipitation assay assay showed β-catenin/LEF-1 heterodimer could directly bind to the promoter of Mre11 in vivo. And the luciferase activity of the pGL3-Mre11 and pGL3-Lef increased in HeLa cells following β-catenin plasmid co-transfected, but was abolished when the LEF-1-binding conserved sequences of Mre11 promoter were mutated. These results together support Akt can upregulate the expression of Mre11 through GSK3β/ β-catenin/LEF pathway to elevate DSB-repair capacity in cancer cells.
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Ye W, Gong X, Xie J, Wu J, Zhang X, Ouyang Q, Zhao X, Shi Y, Zhang X. AChE deficiency or inhibition decreases apoptosis and p53 expression and protects renal function after ischemia/reperfusion. Apoptosis 2010; 15:474-87. [PMID: 20054652 DOI: 10.1007/s10495-009-0438-3] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
We recently reported that the expression of the synaptic form of acetylcholinesterase (AChE) is induced during apoptosis in various cell types in vitro. Here, we provide evidence to confirm that AChE is expressed during ischemia-reperfusion (I/R)-induced apoptosis in vivo. Renal I/R is a major cause of acute renal failure (ARF), resulting in injury and the eventual death of renal cells due to a combination of apoptosis and necrosis. Using AChE-deficient mice and AChE inhibitors, we investigated whether AChE deficiency or inhibition can protect against apoptosis caused by I/R in a murine kidney model. Unilateral clamping of renal pedicles for 90 min followed by reperfusion for 24 h caused significant renal dysfunction and injury. Both genetic AChE deficiency and chemical inhibition of AChE (provided by huperzine A, tacrine and donepezil) significantly reduced the biochemical and histological evidence of renal dysfunction following I/R. Activation of caspases-8, -9, -12, and -3 in vivo were prevented and associated with reduced levels of cell apoptosis and cell death. A further investigation also confirmed that AChE deficiency down-regulated p53 induction and phosphorylation at serine-15, and decreased the Bax/Bcl-2 ratio during I/R. In conclusion, our study demonstrates that AChE may be a pro-apoptotic factor and the inhibition of AChE reduces renal I/R injury. These findings suggest that AChE inhibitors may represent a therapeutic strategy for protection against ischemic acute renal failure.
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Affiliation(s)
- Weiyuan Ye
- Shanghai Institutes for Biological Sciences, Graduate School of the Chinese Academy of Sciences, Chinese Academy of Sciences, China.
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Deng R, Tang J, Xie BF, Feng GK, Huang YH, Liu ZC, Zhu XF. SYUNZ-16, a newly synthesized alkannin derivative, induces tumor cells apoptosis and suppresses tumor growth through inhibition of PKB/AKT kinase activity and blockade of AKT/FOXO signal pathway. Int J Cancer 2010; 127:220-9. [PMID: 19904742 DOI: 10.1002/ijc.25032] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Alkannin is the major bioactive compound of Arnebia euchroma roots, which is used in many therapeutic remedies in Chinese traditional medicine. SYUNZ-16 is a new derivative of alkannin. In this study, anticancer effects of SYUNZ-16 on human lung adenocarcinoma cell line GLC-82 and human hepatocarcinoma cell line Hep3B were tested in vitro. The results showed SYUNZ-16 could obviously inhibit the proliferation of these cancer cell lines via induction of apoptosis, with the evidence of increasing AnnexinV-positive cells and cleaved caspase-3 and PARP fragments. More importantly, we found that SYUNZ-16 could inhibit AKT activity in cell-free system. Treatment of cancer cells with SYUNZ-16 decreased the phosphorylation of AKT. Additionally, SYUNZ-16 partially attenuated the phosphorylation levels of FKHR and FKHRL1 in a dose-dependent and time-dependent fashion, and led to an increase in the nuclear accumulation of exogenous FKHR, and upregulated the mRNA expression of Bim and TRADD in cancer cells. Further study showed that constitutively activated AKT1 transfection could reduce apoptosis induction mediated by SYUNZ-16. The in vivo experiments showed that SYUNZ-16 had inhibitory effects on S-180 sarcoma implanted to mice. And in GLC-82 xenograft models, SYUNZ-16 at 20 mg/kg/qod remarkably inhibited the tumor growth with the T/C value of 45.3%. Taken together, SYUNZ-16 might be a potent inhibitor of AKT signaling pathway in tumor cells. These data provide evidence for the development of SYUNZ-16 as a potential antitumor drug candidate for further research and development.
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Affiliation(s)
- Rong Deng
- The State Key Laboratory of Oncology in South China, Cancer Center, Sun Yat-Sen University, Guangzhou, China
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Calcium induces expression of cytoplasmic gelsolin in SH-SY5Y and HEK-293 cells. Neurochem Res 2010; 35:1075-82. [PMID: 20339915 DOI: 10.1007/s11064-010-0157-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/12/2010] [Indexed: 12/28/2022]
Abstract
Gelsolin plays an important role in the regulation of amyloid beta-protein fibrillogenesis. We report here that calcium ionophore A23187 induces the expression of cytoplasmic gelsolin (c-gelsolin), and that protein kinase C (PKC) is involved in the up-regulation of c-gelsolin. In the presence of calcium, both SH-SY5Y and HEK-293 cells upon treatment with A23187 showed an increase in c-gelsolin expression in a concentration-dependent manner. Calcium-mediated up-regulation of c-gelsolin was inhibited by cycloheximide (a general inhibitor of protein synthesis). When cells were pretreated with staurosporine (an inhibitor of a variety of protein kinases including PKC), the up-regulation of c-gelsolin induced by A23187 was inhibited. Calphostin C, an inhibitor of PKC, blocked the up-regulation of c-gelsolin induced by A23187, while inhibitors of mitogen-activated protein kinases had no effect on c-gelsolin expression. In addition, phorbol-12-myristate-13-acetate, an activator of PKC, up-regulated c-gelsolin expression. These results suggest that calcium mediates up-regulation of c-gelsolin in a PKC-dependent manner.
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Zhou WJ, Deng R, Zhang XY, Feng GK, Gu LQ, Zhu XF. G-quadruplex ligand SYUIQ-5 induces autophagy by telomere damage and TRF2 delocalization in cancer cells. Mol Cancer Ther 2010; 8:3203-13. [PMID: 19996277 DOI: 10.1158/1535-7163.mct-09-0244] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Agents stabilizing G-quadruplexes have the potential to destroy the functional structure of telomere and could therefore act as antitumor agents. We previously reported that SYUIQ-5 could stabilize G-quadruplex, induce senescence, and inhibit c-myc gene promoter activity. In this study, we showed that SYUIQ-5 inhibited proliferation of CNE2 and HeLa cancer cells, triggered a rapid and potent telomere DNA damage response characterized by the formation of telomeric foci gamma-H2AX, and obviously induced autophagy with the features of increased LC3-II and a punctuated pattern of YFP-LC3 fluorescence. These phenomena may primarily depend on the delocalization of TRF2 from telomere, which was further degraded by proteasomes. Furthermore, overexpression of TRF2 inhibited SYUIQ-5-induced gamma-H2AX expression. Also, ATM was activated following SYUIQ-5 treatment. The pretreatment with ATM inhibitor ku55933 and ATM siRNA effectively reduced the production of gamma-H2AX and LC3-II. ATM knockdown partially antagonized the anticancer effects of SYUIQ-5. Moreover, inhibition of autophagy by short hairpin RNA against the autophagy-related gene ATG5 attenuated the cytotoxicity of SYUIQ-5. These results indicated that SYUIQ-5 triggered potent telomere damage through TRF2 delocalization from telomeres, and eventually induced autophagic cell death in cancer cells. Our findings exhibit a novel mechanism that is responsible for the antitumor effects of SYUIQ-5.
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Affiliation(s)
- Wen-Jun Zhou
- State Key Laboratory of Oncology in South China, Cancer Center, Sun Yat-sen University, 651 Dongfeng Road East, Guangzhou 510060, China
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Lee SLO, Hong SW, Shin JS, Kim JS, Ko SG, Hong NJ, Kim DJ, Lee WJ, Jin DH, Lee MS. p34SEI-1 inhibits doxorubicin-induced senescence through a pathway mediated by protein kinase C-delta and c-Jun-NH2-kinase 1 activation in human breast cancer MCF7 cells. Mol Cancer Res 2009; 7:1845-53. [PMID: 19903772 DOI: 10.1158/1541-7786.mcr-09-0086] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In this study, we describe a novel function of the p34(SEI-1) protein, which is both an oncogenic protein and a positive regulator of the cell cycle. The p34(SEI-1) protein was found to inhibit doxorubicin-induced senescence. We investigated the molecular mechanisms of the inhibitory effect of p34(SEI-1) on senescence. First, we found that the activation of protein kinase C-delta (PKC-delta), which is cleaved into a 38 kDa active form from a 78 kDa pro-form, induced after doxorubicin treatment, was inhibited by p34(SEI-1). Furthermore, p34(SEI-1) induced the ubiquitination of PKC-delta. Yet, there is no interaction between p34(SEI-1) and PKC-delta. We also found that the phosphorylation of c-Jun-NH(2)-kinase 1 (JNK1) induced after doxorubicin treatment was suppressed by p34(SEI-1), but not in JNK2. Consistently, pharmacologic or genetic inactivation of either PKC-delta or JNK1 was found to inhibit doxorubicin-induced senescence. In addition, the genetic inactivation of PKC-delta by PKC-delta small interfering RNA resulted in an inhibition of JNK1 activation, but PKC-delta expression was not inactivated by JNK1 small interfering RNA, implying that the activation of JNK1 could be dependently induced by PKC-delta. Therefore, p34(SEI-1) inhibits senescence by inducing PKC-delta ubiquitination and preventing PKC-delta-dependent phosphorylation of JNK1.
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Affiliation(s)
- Sae Lo Oom Lee
- Research Center for Women's Diseases, Division of Biological Sciences, Sookmyung Women's University, Seoul, Korea
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Deng R, Tang J, Xia LP, Li DD, Zhou WJ, Wang LL, Feng GK, Zeng YX, Gao YH, Zhu XF. ExcisaninA, a diterpenoid compound purified from Isodon MacrocalyxinD, induces tumor cells apoptosis and suppresses tumor growth through inhibition of PKB/AKT kinase activity and blockade of its signal pathway. Mol Cancer Ther 2009; 8:873-82. [PMID: 19372560 DOI: 10.1158/1535-7163.mct-08-1080] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Isodon diterpenoids have received considerable phytochemical and biological attention for their strong antitumor activity with low toxicity. In this study, ExcisaninA, a diterpenoid compound purified from Isodon MacrocalyxinD, was tested on human Hep3B and MDA-MB-453 cell lines and Hep3B xenograft models. The results showed ExcisaninA could inhibit the proliferation of Hep3B and MDA-MB-453 cells via induction of apoptosis, with the evidence of increasing AnnexinV-positive cells and characteristic morphologic changes of apoptosis in the nucleus. Also, ExcisaninA sensitized Hep3B cells to 5-fluorouracil treatment or MDA-MB-453 cells to ADM treatment in vitro. In Hep3B xenograft models, ExcisaninA at 20 mg/kg/d remarkably decreased the xenograft tumor size and induced tumor cells apoptosis using transferase-mediated FITC-12-dUTP nick-end labeling assay. More importantly, we found that ExcisaninA could inhibit AKT activity and block its signal pathway in vitro and in vivo. And treatment with ExcisaninA significantly reduced the number of viable cells in Hep3B/myr-AKT1 cells more than that in control cells. Together, ExcisaninA might be a potent inhibitor of AKT signaling pathway in tumor cells. These data provide validation for the development of ExcisaninA to treat cancers displaying elevated levels of AKT.
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Affiliation(s)
- Rong Deng
- State Key Laboratory of Oncology in South China, Cancer Center, Sun Yat-sen University, 651 Dongfeng Road East, Guangzhou 510060, China
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Is acetylcholine an autocrine/paracrine growth factor via the nicotinic α7-receptor subtype in the human colon cancer cell line HT-29? Eur J Pharmacol 2009; 609:27-33. [DOI: 10.1016/j.ejphar.2009.03.002] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2008] [Revised: 02/16/2009] [Accepted: 03/03/2009] [Indexed: 12/31/2022]
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The pivotal role of c-Jun NH2-terminal kinase-mediated Beclin 1 expression during anticancer agents-induced autophagy in cancer cells. Oncogene 2008; 28:886-98. [PMID: 19060920 DOI: 10.1038/onc.2008.441] [Citation(s) in RCA: 216] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The c-Jun NH2-terminal kinase (JNK) pathway represents one subgroup of MAP kinases that are activated primarily by cytokines and exposure to environmental stress. Autophagy is a protein-degradation system characterized by the formation of double-membrane vacuoles termed autophagosomes. Autophagy-related gene beclin 1 plays a key role in autophagosome formation. However, the relationships between activation of JNK pathway, autophagy induction and Beclin 1 expression remain elusive. In this study, we used human cancer cell lines CNE2 and Hep3B to investigate the role of JNK-mediated Beclin 1 expression in ceramide-induced autophagic cell death. Ceramide-treated cells exhibited the characteristics of autophagy (that is, acidic vesicular organelle formation and the LC3-II generation). JNK was activated in these two cell lines exposed to ceramide and the phosphorylation of c-Jun also increased. In the meantime, we found that ceramide upregulated Beclin 1 expression in cancer cells. The upregulation of Beclin 1 expression could be blocked by SP600125 (a specific inhibitor of JNK) or a small interfering RNA (siRNA) directed against JNK1/2 or c-Jun. Chromatin immunoprecipitation and luciferase reporter analysis revealed that c-Jun was involved in the regulation of beclin 1 transcription in response to ceramide treatment. In addition, inhibition of JNK activity by SP600125 could inhibit autophagy induction by ceramide. Furthermore, Beclin 1 knockdown by siRNA also inhibited ceramide-mediated autophagic cell death. JNK-mediated Beclin 1 expression was also observed in topotecan-induced autophagy. These data suggest that activation of JNK pathway can mediate Beclin 1 expression, which plays a key role in autophagic cell death in cancer cells.
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Cancer-associated differences in acetylcholinesterase activity in bronchial aspirates from patients with lung cancer. Clin Sci (Lond) 2008; 115:245-53. [PMID: 18211261 DOI: 10.1042/cs20070393] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
In non-neuronal contexts, ACh (acetylcholine) is thought to be involved in the regulation of vital cell functions, such as proliferation, differentiation, apoptosis and cell-cell interaction. In airways, most cells express the non-neuronal cholinergic system, each containing a specific set of components required for synthesis, signal transduction and ACh hydrolysis. The aim of the present study was determine the expression of cholinergic system components in bronchial aspirates from control subjects and patients with lung cancer. We conducted an analysis of cholinergic components in the stored soluble and cellular fraction of bronchial aspirates from non-cancerous patients and patients diagnosed with lung cancer. The results show that the fluid secreted by human lung cells contains enough AChE (acetylcholinesterase) activity to control ACh levels. Thus these findings demonstrate that: (i) AChE activity is significantly lower in aspirates from squamous cell carcinomas; (ii) the molecular distribution of AChE in both bronchial cells and fluids consisted of amphiphilic monomers and dimers; and (iii) choline acetyltransferase, nicotinic receptors and cholinesterases are expressed in cultured human lung cells, as demonstrated by RT-PCR (reverse transcriptase-PCR). It appears that the non-neuronal cholinergic system is involved in lung physiology and lung cancer. The physiological consequences of the presence of non-neuronal ACh will depend on the particular cholinergic signalling network in each cell type. Clarifying the pathophysiological actions of ACh remains an essential task and warrants further investigation.
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45
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Old and new questions about cholinesterases. Chem Biol Interact 2008; 175:30-44. [DOI: 10.1016/j.cbi.2008.04.039] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2007] [Revised: 04/25/2008] [Accepted: 04/28/2008] [Indexed: 01/21/2023]
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Toiber D, Berson A, Greenberg D, Melamed-Book N, Diamant S, Soreq H. N-acetylcholinesterase-induced apoptosis in Alzheimer's disease. PLoS One 2008; 3:e3108. [PMID: 18769671 PMCID: PMC2518620 DOI: 10.1371/journal.pone.0003108] [Citation(s) in RCA: 78] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2008] [Accepted: 08/08/2008] [Indexed: 12/17/2022] Open
Abstract
Background Alzheimer's disease (AD) involves loss of cholinergic neurons and Tau protein hyper-phosphorylation. Here, we report that overexpression of an N-terminally extended “synaptic” acetylcholinesterase variant, N-AChE-S is causally involved in both these phenomena. Methodology and Principal Findings In transfected primary brain cultures, N-AChE-S induced cell death, morphological impairments and caspase 3 activation. Rapid internalization of fluorescently labeled fasciculin-2 to N-AChE-S transfected cells indicated membranal localization. In cultured cell lines, N-AChE-S transfection activated the Tau kinase GSK3, induced Tau hyper-phosphorylation and caused apoptosis. N-AChE-S-induced cell death was suppressible by inhibiting GSK3 or caspases, by enforced overexpression of the anti-apoptotic Bcl2 proteins, or by AChE inhibition or silencing. Moreover, inherent N-AChE-S was upregulated by stressors inducing protein misfolding and calcium imbalances, both characteristic of AD; and in cortical tissues from AD patients, N-AChE-S overexpression coincides with Tau hyper-phosphorylation. Conclusions Together, these findings attribute an apoptogenic role to N-AChE-S and outline a potential value to AChE inhibitor therapeutics in early AD.
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Affiliation(s)
- Debra Toiber
- Department of Biological Chemistry, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Amit Berson
- Department of Biological Chemistry, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - David Greenberg
- Department of Biological Chemistry, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Naomi Melamed-Book
- Department of Biological Chemistry, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Sophia Diamant
- Department of Biological Chemistry, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Hermona Soreq
- Department of Biological Chemistry, The Hebrew University of Jerusalem, Jerusalem, Israel
- Interdisciplinary Center for Neuronal Computation (ICNC), The Hebrew University of Jerusalem, Jerusalem, Israel
- * E-mail:
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Bates JS, Petry DB, Eudy J, Bough L, Johnson RK. Differential expression in lung and bronchial lymph node of pigs with high and low responses to infection with porcine reproductive and respiratory syndrome virus. J Anim Sci 2008; 86:3279-89. [PMID: 18641179 DOI: 10.2527/jas.2007-0685] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
One hundred Hampshire x Duroc cross-bred pigs and 100 Nebraska Index line pigs were infected with porcine reproductive and respiratory syndrome virus (PRRSV) and evaluated for resistance and susceptibility. Controls (100/line) were uninfected littermates to infected pigs. Viremia (V), BW change (WTDelta), and rectal temperature at 0, 4, 7, and 14 d postinfection were recorded. Lung, bronchial lymph node (BLN), and blood tissue were collected at necropsy (14 d postinfection). Infected pigs were classified as low or high responders to PRRSV based on the first principal component from principal component analyses of all variables. Low responders to PRRSV (low PRRSV burden) and their uninfected littermates were assigned to the low (L) class. High responders to PRRSV (high PRRSV burden) and their uninfected littermates were assigned to the high (H) class. Infected pigs in the L class had large WTDelta, low V, and few lung lesions; H-class pigs had small WTDelta, high V, and many lung lesions. Ribonucleic acid was extracted from lung and BLN tissue of the 7 highest and 7 lowest responders per line and from each of their control littermates. A control reference design was used, and cDNA from each reference sample tissue was prepared from pooled RNA extracted from 2 control pigs from each line whose infected littermates had a principal component value of 0. Design variables in data analyses were line (Index vs. Hampshire x Duroc), class (H vs. L), treatment (infected vs. uninfected controls), and slide/pig as error. Oligo differential expression was based on P < 0.01 occurring in both lung and BLN. Line and treatment effects were significant for 38 and 541 oligos, respectively, in both lung and BLN. Line x class interaction existed for expression of thymosin beta-4, DEAD box RNA helicase 3, acetyl-cholinesterase, and Homo sapiens X (inactive)-specific transcript in both tissues. Treatment x class existed for expression of CCAAT/enhancer-binding delta protein, nuclear factor of kappa light polypeptide gene enhancer in B cells inhibitor alpha, thioredoxin-interacting protein, major facilitator superfamily domain containing 1, and unknown sequences SS00012040 and SS00012343. Line x treatment and line x treatment x class interactions were not significant. Possible important genetic associations for fine-mapping candidate genes related to response to PRRSV and determining causative alleles were revealed.
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Affiliation(s)
- J S Bates
- Department of Animal Science, University of Nebraska, Lincoln 68583-0908, USA
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Syed M, Fenoglio-Preiser C, Skau KA, Weber GF. Acetylcholinesterase supports anchorage independence in colon cancer. Clin Exp Metastasis 2008; 25:787-98. [PMID: 18612832 DOI: 10.1007/s10585-008-9192-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2007] [Accepted: 06/19/2008] [Indexed: 11/24/2022]
Abstract
Various roles have been attributed to Acetylcholinesterase (AChE) in cancer. Evidence exists for a pro-apoptotic function, consistent with a protective role of AChE. Because other reports suggested that upregulated AChE in some tumors may control cell adhesion, we tested the effects of AChE on anchorage independence (an essential component of metastasis) of colon tumor cells. Several AChE inhibitors dose-dependently suppressed colony formation of HTB-38 cells in soft agar. This effect of AChE was confirmed with HTB-38 cells stably overexpressing AChE. In contrast, cell proliferation was not altered by the effective doses of these chemical inhibitors or by transfected AChE. Protection from cell cycle arrest consecutive to cancer cell detachment may be conveyed by changes in cell-matrix interactions. Reflective of such changes, the AChE overexpressing cells adhered more strongly to Fibronectin than did the vector controls. The AChE-dependent adhesion was RGD-dependent and accompanied by increased c-Myb DNA-binding, suggesting that AChE upregulates an Integrin receptor via c-Myb. In support of these observations, we find AChE message and protein to be expressed in a large fraction of colon cancers and in all colon tumor cell lines analyzed, but only rarely in normal colon specimens. Our results imply a dual role for AChE in colon cancer. While the anti-apoptotic effects of AChE may be protective against early stages of tumorigenesis, this gene product may support the later stages of transformation by enhancing anchorage independent growth. The induction of Integrins could render the cells independent of microenvironmental cues and override cell cycle arrest after deadhesion.
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Affiliation(s)
- Moyeenuddin Syed
- College of Pharmacy, University of Cincinnati Academic Health Center, 3225 Eden Avenue, Cincinnati, OH 45267-0004, USA
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Park SE, Jeong SH, Yee SB, Kim TH, Soung YH, Ha NC, Kim ND, Park JY, Bae HR, Park BS, Lee HJ, Yoo YH. Interactions of acetylcholinesterase with caveolin-1 and subsequently with cytochrome c are required for apoptosome formation. Carcinogenesis 2008; 29:729-37. [PMID: 18258603 DOI: 10.1093/carcin/bgn036] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Acetylcholinesterase (AChE) is emerging as an important component in leading to apoptosis. Our previous study demonstrated that silencing of the AChE gene blocked the interaction between cytochrome c and apoptotic protease-activating factor-1 (Apaf-1) in etoposide-induced apoptosis of HT-29 cells. We undertook this study to further dissect the molecular role of AChE in apoptosome formation. The present study elicited that small interfering RNA (siRNA) to cytochrome c gene blocked the interaction of AChE with Apaf-1, whereas siRNA to Apaf-1 gene did not block the interaction of AChE with cytochrome c, indicating that the interaction of AChE with cytochrome c is required for the interaction between cytochrome c and protease-activating factor-1. We further observed that AChE is localized to caveolae via interacting with caveolin-1 during apoptosis and that the disruption of caveolae prevented apoptosome formation. These data indicate that the interactions of AChE with caveolin-1 and subsequently with cytochrome c appear to be indispensable for apoptosome formation.
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Affiliation(s)
- Sang Eun Park
- Department of Anatomy and Cell Biology, Dong-A University College of Medicine and Medical Science Research Center, Busan 602-714, South Korea
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Abstract
Acetylcholinesterase is indispensable for terminating acetylcholine-mediated neurotransmission at cholinergic synapses. In addition, there is evidence to suggest that acetylcholinesterase contributes to various physiological processes through its involvement in the regulation of cell proliferation, differentiation and survival. The effects of acetylcholinesterase depend on the cell type and cell-differentiation state, the modulation of expression levels, cellular distribution and binding with its protein partners. This minireview highlights recent progress that has advanced our understanding of the role of acetylcholinesterase in the process of cell proliferation and apoptosis.
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Affiliation(s)
- Hua Jiang
- Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, China
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