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Raza S, Siddiqui JA, Srivastava A, Chattopadhyay N, Sinha RA, Chakravarti B. Autophagy as a Therapeutic Target in Breast Tumors: The Cancer stem cell perspective. AUTOPHAGY REPORTS 2024; 3:27694127.2024.2358648. [PMID: 39006309 PMCID: PMC7616179 DOI: 10.1080/27694127.2024.2358648] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Accepted: 05/16/2024] [Indexed: 07/16/2024]
Abstract
Breast cancer is a heterogeneous disease, with a subpopulation of tumor cells known as breast cancer stem cells (BCSCs) with self-renewal and differentiation abilities that play a critical role in tumor initiation, progression, and therapy resistance. The tumor microenvironment (TME) is a complex area where diverse cancer cells reside creating a highly interactive environment with secreted factors, and the extracellular matrix. Autophagy, a cellular self-digestion process, influences dynamic cellular processes in the tumor TME integrating diverse signals that regulate tumor development and heterogeneity. Autophagy acts as a double-edged sword in the breast TME, with both tumor-promoting and tumor-suppressing roles. Autophagy promotes breast tumorigenesis by regulating tumor cell survival, migration and invasion, metabolic reprogramming, and epithelial-mesenchymal transition (EMT). BCSCs harness autophagy to maintain stemness properties, evade immune surveillance, and resist therapeutic interventions. Conversely, excessive, or dysregulated autophagy may lead to BCSC differentiation or cell death, offering a potential avenue for therapeutic exploration. The molecular mechanisms that regulate autophagy in BCSCs including the mammalian target of rapamycin (mTOR), AMPK, and Beclin-1 signaling pathways may be potential targets for pharmacological intervention in breast cancer. This review provides a comprehensive overview of the relationship between autophagy and BCSCs, highlighting recent advancements in our understanding of their interplay. We also discuss the current state of autophagy-targeting agents and their preclinical and clinical development in BCSCs.
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Affiliation(s)
- Sana Raza
- Department of Endocrinology, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow226014, India
| | - Jawed Akhtar Siddiqui
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE-68198, USA
| | - Anubhav Srivastava
- Department of Molecular Medicine & Biotechnology, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow226014, India
| | - Naibedya Chattopadhyay
- Division of Endocrinology and Center for Research in Anabolic Skeletal Target in Health and Illness (ASTHI), CSIR-Central Drug Research Institute, Council of Scientific and Industrial Research, Sector 10, Jankipuram Extension, Sitapur Road, Lucknow, 226031, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Rohit Anthony Sinha
- Department of Endocrinology, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow226014, India
| | - Bandana Chakravarti
- Department of Endocrinology, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow226014, India
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Beilankouhi EAV, Valilo M, Dastmalchi N, Teimourian S, Safaralizadeh R. The Function of Autophagy in the Initiation, and Development of Breast Cancer. Curr Med Chem 2024; 31:2974-2990. [PMID: 37138421 DOI: 10.2174/0929867330666230503145319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Revised: 02/26/2021] [Accepted: 03/15/2021] [Indexed: 05/05/2023]
Abstract
Autophagy is a significant catabolic procedure that increases in stressful conditions. This mechanism is mostly triggered after damage to the organelles, the presence of unnatural proteins, and nutrient recycling in reaction to these stresses. One of the key points in this article is that cleaning and preserving damaged organelles and accumulated molecules through autophagy in normal cells helps prevent cancer. Since dysfunction of autophagy is associated with various diseases, including cancer, it has a dual function in tumor suppression and expansion. It has newly become clear that the regulation of autophagy can be used for the treatment of breast cancer, which has a promising effect of increasing the efficiency of anticancer treatment in a tissue- and cell-type-specific manner by affecting the fundamental molecular mechanisms. Regulation of autophagy and its function in tumorigenesis is a vital part of modern anticancer techniques. This study discusses the current advances related to the mechanisms that describe essential modulators of autophagy involved in the metastasis of cancers and the development of new breast cancer treatments.
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Affiliation(s)
| | - Mohammad Valilo
- Department of Biochemistry, Faculty of Medicine, Urmia University of Medical Sciences, Urmia, Iran
| | - Narges Dastmalchi
- Department of Biology, University College of Nabi Akram, Tabriz, Iran
| | - Shahram Teimourian
- Department of Medical Genetics, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Reza Safaralizadeh
- Department of Animal Biology, Faculty of Natural Sciences, University of Tabriz, Tabriz, Iran
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Samy A, Hussein MA, Munirathinam G. Eprinomectin: a derivative of ivermectin suppresses growth and metastatic phenotypes of prostate cancer cells by targeting the β-catenin signaling pathway. J Cancer Res Clin Oncol 2023:10.1007/s00432-023-04829-5. [PMID: 37171616 DOI: 10.1007/s00432-023-04829-5] [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: 03/20/2023] [Accepted: 04/29/2023] [Indexed: 05/13/2023]
Abstract
PURPOSE Prostate cancer (PCa) is the second leading cause of cancer death among men in the USA. The emergence of resistance to androgen deprivation therapy gives rise to metastatic castration-resistant prostate cancer. Eprinomectin (EP) is a member of a family of drugs called avermectins with parasiticide and anticancer properties. The pupose of this study was to evaluate the anticancer effects of EP against metastatic PCa using cellular models. METHODS: In this study, we have investigated the effect of EP's anticancer properties and delineated the underlying mechanisms in the DU145 cellular model using several assays such as cell viability assay, colony formation assay, wound-healing assay, immunofluorescence, apoptosis assay, cell cycle analysis, and immunoblotting. RESULTS Our results indicate that EP significantly inhibits the cell viability, colony formation, and migration capacities of DU145 cells. EP induces cell cycle arrest at the G0/G1 phase, apoptosis via the activation of different caspases, and autophagy through the increase in the generation of reactive oxygen species and endoplasmic reticulum stress. In addition, EP downregulates the expression of cancer stem cell markers and mediates the translocation of β-catenin from the nucleus to the cytoplasm, indicating its role in inhibiting downstream target genes such as c-Myc and cyclin D1. CONCLUSION Our study shows that EP has tremendous potential to target metastatic PCa cells and provides new avenues for therapeutic approaches for advanced PCa.
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Affiliation(s)
- Angela Samy
- Department of Biomedical Sciences, University of Illinois College of Medicine, 1601 Parkview Avenue, Rockford, IL, 61107, USA
| | - Mohamed Ali Hussein
- Department of Biomedical Sciences, University of Illinois College of Medicine, 1601 Parkview Avenue, Rockford, IL, 61107, USA
- Department of Pharmaceutical Services, Children's Cancer Hospital Egypt 57357, Cairo, Egypt
| | - Gnanasekar Munirathinam
- Department of Biomedical Sciences, University of Illinois College of Medicine, 1601 Parkview Avenue, Rockford, IL, 61107, USA.
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Li T, Liu N, Zhang G, Chen M. CASP4 and CASP8 as newly defined autophagy-pyroptosis-related genes associated with clinical and prognostic features of renal cell carcinoma. J Cancer Res Ther 2022; 18:1952-1960. [PMID: 36647955 DOI: 10.4103/jcrt.jcrt_126_22] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Objective The rapid discoveries of autophagy and pyroptosis have opened new avenues for treating renal cell carcinoma (RCC). The objective was to identify potential autophagy-pyroptosis-related drug targets and plausible prognostic biomarkers crucial for disease detection. Materials and Methods Gene expression data were downloaded from Gene Expression Omnibus (GSE168845), and autophagy-pyroptosis-related differentially expressed genes (DEGs) were identified. The prognostic values of DEGs were assessed using differential expression analysis and Kaplan-Meier curves, a prognostic nomogram was constructed using the DEG data, and the correlation between DEGs and infiltrating immune cells was evaluated. Additionally, quantitative real-time polymerase chain reaction (qRT-PCR) and immunohistochemistry (IHC) were carried out to verify the expression levels of DEGs. Results CASP4 and CASP8 were identified as RCC-associated autophagy-pyroptosis-related genes, and CASP4 and CASP8 were found to be highly expressed in RCC tumor tissues. High expression of CASP4 and CASP8 was associated with higher pathological staging and poorer prognosis, whereas a prognostic nomogram constructed based on CASP4 and CASP8 could better predict RCC patient survival rates. Additionally, increased expression of CASP4 and CASP8 was highly correlated with the expression levels of multiple infiltrating immune cell types. Moreover, qRT-PCR and IHC validated the increased expression of CASP4 and CASP8 in RCC. Conclusion CASP4 and CASP8 were autophagy-pyroptosis-related genes associated with immunotherapy in RCC. CASP4 and CASP8 were identified as potential targets and effective prognostic biomarkers for RCC.
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Affiliation(s)
- Tao Li
- Department of Urology, Affiliated Zhongda Hospital of Southeast University, Nanjing, China
| | - Ning Liu
- Department of Urology, Affiliated Zhongda Hospital of Southeast University, Nanjing, China
| | - Guangyuan Zhang
- Department of Urology, Affiliated Zhongda Hospital of Southeast University, Nanjing, China
| | - Ming Chen
- Department of Urology, Affiliated Zhongda Hospital of Southeast University, Nanjing, China
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The cross-talk of autophagy and apoptosis in breast carcinoma: implications for novel therapies? Biochem J 2022; 479:1581-1608. [PMID: 35904454 DOI: 10.1042/bcj20210676] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2021] [Revised: 07/05/2022] [Accepted: 07/06/2022] [Indexed: 12/12/2022]
Abstract
Breast cancer is still the most common cancer in women worldwide. Resistance to drugs and recurrence of the disease are two leading causes of failure in treatment. For a more efficient treatment of patients, the development of novel therapeutic regimes is needed. Recent studies indicate that modulation of autophagy in concert with apoptosis induction may provide a promising novel strategy in breast cancer treatment. Apoptosis and autophagy are two tightly regulated distinct cellular processes. To maintain tissue homeostasis abnormal cells are disposed largely by means of apoptosis. Autophagy, however, contributes to tissue homeostasis and cell fitness by scavenging of damaged organelles, lipids, proteins, and DNA. Defects in autophagy promote tumorigenesis, whereas upon tumor formation rapidly proliferating cancer cells may rely on autophagy to survive. Given that evasion of apoptosis is one of the characteristic hallmarks of cancer cells, inhibiting autophagy and promoting apoptosis can negatively influence cancer cell survival and increase cell death. Hence, combination of antiautophagic agents with the enhancement of apoptosis may restore apoptosis and provide a therapeutic advantage against breast cancer. In this review, we discuss the cross-talk of autophagy and apoptosis and the diverse facets of autophagy in breast cancer cells leading to novel models for more effective therapeutic strategies.
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Ravichandran R, PriyaDharshini LC, Sakthivel KM, Rasmi RR. Role and regulation of autophagy in cancer. Biochim Biophys Acta Mol Basis Dis 2022; 1868:166400. [PMID: 35341960 DOI: 10.1016/j.bbadis.2022.166400] [Citation(s) in RCA: 62] [Impact Index Per Article: 31.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Revised: 03/17/2022] [Accepted: 03/18/2022] [Indexed: 02/07/2023]
Abstract
Autophagy is an intracellular self-degradative mechanism which responds to cellular conditions like stress or starvation and plays a key role in regulating cell metabolism, energy homeostasis, starvation adaptation, development and cell death. Numerous studies have stipulated the participation of autophagy in cancer, but the role of autophagy either as tumor suppressor or tumor promoter is not clearly understood. However, mechanisms by which autophagy promotes cancer involves a diverse range of modifications of autophagy associated proteins such as ATGs, Beclin-1, mTOR, p53, KRAS etc. and autophagy pathways like mTOR, PI3K, MAPK, EGFR, HIF and NFκB. Furthermore, several researches have highlighted a context-dependent, cell type and stage-dependent regulation of autophagy in cancer. Alongside this, the interaction between tumor cells and their microenvironment including hypoxia has a great potential in modulating autophagy response in favour to substantiate cancer cell metabolism, self-proliferation and metastasis. In this review article, we highlight the mechanism of autophagy and their contribution to cancer cell proliferation and development. In addition, we discuss about tumor microenvironment interaction and their consequence on selective autophagy pathways and the involvement of autophagy in various tumor types and their therapeutic interventions concentrated on exploiting autophagy as a potential target to improve cancer therapy.
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Affiliation(s)
- Rakesh Ravichandran
- Department of Biotechnology, PSG College of Arts and Science, Civil Aerodrome Post, Coimbatore 641 014, Tamil Nadu, India
| | | | - Kunnathur Murugesan Sakthivel
- Department of Biochemistry, PSG College of Arts and Science, Civil Aerodrome Post, Coimbatore 641 014, Tamil Nadu, India
| | - Rajan Radha Rasmi
- Department of Biotechnology, PSG College of Arts and Science, Civil Aerodrome Post, Coimbatore 641 014, Tamil Nadu, India.
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Curcumin as an Enhancer of Therapeutic Efficiency of Chemotherapy Drugs in Breast Cancer. Int J Mol Sci 2022; 23:ijms23042144. [PMID: 35216255 PMCID: PMC8878285 DOI: 10.3390/ijms23042144] [Citation(s) in RCA: 34] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2021] [Revised: 01/30/2022] [Accepted: 02/01/2022] [Indexed: 12/21/2022] Open
Abstract
Female breast cancer is the world’s most prevalent cancer in 2020. Chemotherapy still remains a backbone in breast cancer therapy and is crucial in advanced and metastatic breast cancer treatment. The clinical efficiency of chemotherapy regimens is limited due to tumor heterogeneity, chemoresistance, and side effects. Chemotherapeutic drug combinations with natural products hold great promise for enhancing their anticancer efficacy. Curcumin is an ideal chemopreventive and chemotherapy agent owning to its multitargeting function on various regulatory molecules, key signaling pathways, and pharmacological safety. This review aimed to elucidate the potential role of curcumin in enhancing the efficacy of doxorubicin, paclitaxel, 5-fluorouracil, and cisplatin via combinational therapy. Additionally, the molecular mechanisms underlying the chemosensitizing activity of these combinations have been addressed. Overall, based on the promising therapeutic potential of curcumin in combination with conventional chemotherapy drugs, curcumin is of considerable value to develop as an adjunct for combination chemotherapy with current drugs to treat breast cancer. Furthermore, this topic may provide the frameworks for the future research direction of curcumin–chemotherapy combination studies and may benefit in the development of a novel therapeutic strategy to maximize the clinical efficacy of anticancer drugs while minimizing their side effects in the future breast cancer treatment.
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Kim YS, Lee YG, Kim MT, Lee HJ. Treatment With Glycogen Synthase Kinase 3β Inhibitor Decreases Apoptotic and Autophagic Reactions in Rat Rotator Cuff Tears. Orthop J Sports Med 2021; 9:23259671211060771. [PMID: 34901295 PMCID: PMC8652192 DOI: 10.1177/23259671211060771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Accepted: 08/24/2021] [Indexed: 11/15/2022] Open
Abstract
Background: Apoptosis and autophagy are known to be correlated with the extent of damage in torn rotator cuffs, and there is no biological evidence for self-recovery or healing of the rotator cuff tear. Purpose: To establish in a rat model of partial- and full-thickness rotator cuff tears how a glycogen synthase kinase 3β (GSK-3β) inhibitor affects the expression of apoptotic and autophagic markers. Study Design: Controlled laboratory study. Methods: Twelve-week-old Sprague Dawley rats were divided into 3 groups (n = 16 per group). Group 1 acted as the control, with no treatment; group 2 received partial-thickness (right side) and full-thickness (left side) rotator cuff tears only; and group 3 received the same rotator cuff injuries, with GSK-3β inhibitor injected afterward. The tendons from each group were harvested 42 days after surgery. Evaluation of gene expression, immunohistochemistry, and TUNEL staining (terminal deoxynucleotidyl transferase–mediated dUTP nick end labeling) were performed for the following markers: caspases 3, 8, and 9 as well as Bcl-2 (B-cell lymphoma 2); BAX (Bcl-2-associated X protein); beclin 1; p53; and GSK-3β; which represented apoptotic and autophagic reactions. Statistical analysis was performed using 1-way analysis of variance. Results: In the group 2 rats with partial- and full-thickness tears, there were significant increases in the mRNA levels (fold changes) of all 8 markers as compared with group 1 (control). All these increased markers showed significant downregulation by the GSK-3β inhibitor in partial-thickness tears. However, the response to the GSK-3β inhibitor in full-thickness tears was not as prominent as in partial-thickness tears. The number of TUNEL-positive cells in group 2 (partial, 35.08% ± 1.625% [mean ± SE]; full, 46.92% ± 1.319%) was significantly higher than in group 1 (18.02% ± 1.036%; P < .01) and group 3 (partial, 28.04% ± 2.607% [P < .01]; full, 38.97% ± 2.772% [P < .01]), and immunohistochemistry revealed increased expression of all the markers in group 2 as compared with control. Conclusion: The apoptotic and autophagic activity induced in a rat model of an acute rotator cuff tear was downregulated after treatment with a GSK-3β inhibitor, particularly with partial-thickness rotator cuff tears. Clinical Relevance: A GSK-3β inhibitor may be able to modulate deterioration in a torn rotator cuff.
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Affiliation(s)
- Yang-Soo Kim
- Department of Orthopedic Surgery, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Yun-Gyoung Lee
- Department of Orthopedic Surgery, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Min-Tae Kim
- Department of Orthopedic Surgery, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Hyo-Jin Lee
- Department of Orthopedic Surgery, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
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Hu X, Li J. Inhibition of Liver Cancer Cell Growth by Triethylsilyl Resveratrol through Targeting Phosphoinositide-3 Kinase Pathway. DOKL BIOCHEM BIOPHYS 2021; 501:449-453. [PMID: 34966970 DOI: 10.1134/s1607672921060065] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2021] [Revised: 07/27/2021] [Accepted: 07/27/2021] [Indexed: 11/22/2022]
Abstract
Liver cancer is one of the commonly detected malignancy and third highest cause of deaths caused by cancer worldwide. The current study investigated the effect of triethylsilyl resveratrol on HuH7 and hep3B cell proliferation and explored the underlying mechanism. The viability of HuH7 and hep3B cells was suppressed to 23 and 18%, respectively on exposure to 2 µM triethylsilyl resveratrol for 72 h. Triethylsilyl resveratrol treatment of HuH7 cells led to a prominent increase in expression of Atg-5, LC3B-II and Beclin proteins. In triethylsilyl resveratrol treated HuH7 cells expression of activated PI3K and Akt proteins showed a prominent decrease compared to the control cells. Moreover, p-mTOR protein expression was also suppressed in HuH7 cells on treatment with 2 µM triethylsilyl resveratrol. In triethylsilyl resveratrol treated cells a marked increase in ERK1/2 phosphorylation was observed compared to the control cells. Treatment with 2 µM triethylsilyl resveratrol for 72 h led to a significant (p < 0.05) increase in GFP-LC3B labelling in HuH7 cells compared to the control cells. Thus, triethylsilyl resveratrol reduced liver cancer cell viability through increase expression of proteins associated with autophagy. Moreover, it increased p-ERK1/2 expression and targeted activation of PI3K/Akt protein in HuH7 cells. Therefore, triethylsilyl resveratrol may be studied further as a promising therapeutic agent for treatment of liver cancer.
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Affiliation(s)
- Xiaolin Hu
- Department of General Surgery (Hepatobiliary, Gastrointestinal), The People's Hospital of Shouguang, 262700, Shouguang City, Shandong Province, China
| | - Ji Li
- Department of Hepatobiliary Surgery, People's Hospital of He Chuan Chong Qing, No. 1366, Hechuan District, 401520, Chongqing, China.
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Inhibition of autophagy enhances apoptosis induced by Ce6-photodynamic therapy in human colon cancer cells. Photodiagnosis Photodyn Ther 2021; 36:102605. [PMID: 34715368 DOI: 10.1016/j.pdpdt.2021.102605] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Revised: 10/16/2021] [Accepted: 10/22/2021] [Indexed: 12/24/2022]
Abstract
OBJECTIVE To evaluate the therapeutic effect of Chlorin e6 photodynamic therapy (Ce6-PDT) in human colorectal cancer cells and investigate the role of autophagy in Ce6-PDT. METHODS SW480 cells underwent Ce6-PDT with and without pretreatment with the autophagy inhibitor 3-methyladenine (3MA). Cell viability was assessed using 3-(4,5-dimethylthiazol-2-yl)-2, 5-diphenyltetrazolium bromide (MTT) assay. Apoptosis was evaluated using an Annexin V assay, using a rhodamine 123 (RH123) assay to evaluate mitochondrial membrane potential (MMP), and by measuring Caspase-3 and Bcl-2 protein expression using western blotting. Autophagy was evaluated by directly visualizing acridine orange-stained acidic vesicular organelles (AVOs) using fluorescent microscopy and by measuring LC3Ⅰ/Ⅱand Atg5 expression using western blotting. RESULTS Ce6-PDT decreased SW480 viability in a dose-dependent manner. Ce6-PDT induced apoptosis in SW480 cells via the mitochondrial apoptosis pathway as indicated by decreased mitochondrial membrane potential, increased Annexin V staining, and increased Caspase-3 expression. Ce6-PDT was also shown to induce autophagy as demonstrated by increased acridine-orange stained AVOs as well as increased expression of the autophagy-associated proteins Atg5. Inhibition of autophagy with 3MA potentiated SW480 cell response to Ce6-PDT and increased the rate of apoptosis in the treated cells. CONCLUSIONS Ce6-PDT induces autophagy and apoptosis of SW480 cells in a dose-dependent manner. Inhibition of autophagy increases the apoptosis induced by Ce6-PDT. Modulation of autophagy may be a potential therapeutic target for colon cancer cells treated with Ce6-PDT.
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Cui X, Qin X. Hydroxypyridinone-Coumarin Inhibits the Proliferation of MHCC97 and HepG2 Human Hepatocellular Carcinoma Cells and Down-Regulates the Phosphoinositide-3 Kinase Pathway. Med Sci Monit 2020; 26:e920785. [PMID: 32218414 PMCID: PMC7133445 DOI: 10.12659/msm.920785] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Background Worldwide, hepatocellular carcinoma (HCC) is one of the most commonly diagnosed malignant diseases and is the third leading cause of cancer-related death. This study aimed to investigate the effect of hydroxypyridinone-coumarin (HPC) on MHCC97 and HepG2 human HCC cells and the mechanisms involved. Material/Methods MHCC97 and HepG2 human HCC cells were cultured in vitro. An MTT cytotoxicity assay was used to assess cell viability and proliferation, with and without treatment with HPC. Cell autophagosomes were labeled with GFP-LC3 using confocal fluorescence microscopy. Western blot was used to measure protein expression. Results HPC significantly reduced the cell proliferation rate in a concentration-dependent manner, with 2 μM of HPC resulting in a reduced proliferation rate of MHCC97 cells (by 36%) and HepG2 cells (by 29%) (P<0.02). HPC significantly reduced autophagy in MHCC97 and HepG2 cells. Western blot showed that treatment with HPC significant upregulated Atg5, beclin-1, LC3-phosphatidylethanolamine conjugate (LC3-II), and Atg-3, reduced p62 and Akt protein expression, and induced phosphorylation of ERK1/2. GFP-LC3B labeling in MHCC97 and HepG2 cells was increased following HPC treatment. Conclusions HPC induced autophagy and inhibited the proliferation of MHCC97 and HepG2 HCC cells in vitro and involved activation of ERK1/2 and down-regulation of the Akt pathway.
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Affiliation(s)
- Xiaopeng Cui
- Department of General Surgery, Shanxi Provincial People's Hospital, Taiyuan, Shanxi, China (mainland)
| | - Xueliang Qin
- Department of General Surgery, Shanxi Provincial People's Hospital, Taiyuan, Shanxi, China (mainland)
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Hou G, Bai Y, Jia A, Ren Y, Wang Y, Lu J, Wang P, Zhang J, Lu Z. Inhibition of autophagy improves resistance and enhances sensitivity of gastric cancer cells to cisplatin. Can J Physiol Pharmacol 2020; 98:449-458. [PMID: 32058824 DOI: 10.1139/cjpp-2019-0477] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Autophagy plays critical roles in tumorigenesis, while the effects of autophagy on chemoresistance of cancer cells had great disparity. This study aims to explore the impacts of autophagy on the sensitivity and resistance of gastric cancer cells to cisplatin (DDP). We firstly demonstrated that there was stronger autophagy activity in gastric cancer SGC-7901 cells than that in DDP-resisting SGC-7901/DDP cells. Then, we discovered that inhibiting autophagy by chloroquine (CQ) significantly enhanced the proliferation-inhibiting and apoptosis-inducing effects of DDP to SGC-7901 and SGC-7901/DDP cells. Moreover, CQ could partially reverse the resistance of SGC-7901/DDP cells to DDP in a concentration-dependent manner. However, the autophagy inducer everolimus (RAD001) had no obvious effects on the sensitivity of gastric cells to DDP. Mechanistically, we demonstrated that CQ might enhance the sensitivity of SGC-7901cells and improve the resistance of SGC-7901/DDP cells to DDP through inhibiting the mTORC1 pathway, especially to SGC-7901/DDP cells. Additionally, we found interfering Beclin-1 using Beclin-1 shRNA also enhanced the proliferation-inhibiting and apoptosis-inducing effects of DDP on gastric cancer cells by inhibiting phosphorylation of Akt. Our study shows that inhibiting autophagy could improve the chemoresistance and enhanced sensitivity of gastric cancer cells to DDP and provide a rationale for the administration of cisplatin combined with CQ for treating patients with gastric cancer.
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Affiliation(s)
- Guiqin Hou
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, Henan 450001, People's Republic of China
| | - Yiru Bai
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, Henan 450001, People's Republic of China.,First Affiliated Hospital of Henan University of Science and Technology, Luoyang, Henan 471000, People's Republic of China
| | - Ang Jia
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, Henan 450001, People's Republic of China
| | - Yandan Ren
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, Henan 450001, People's Republic of China
| | - Yang Wang
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, Henan 450001, People's Republic of China
| | - Jie Lu
- College of Public Health, Zhengzhou University, Zhengzhou, Henan 450001, People's Republic of China
| | - Peng Wang
- College of Public Health, Zhengzhou University, Zhengzhou, Henan 450001, People's Republic of China
| | - Jianying Zhang
- Henan Academy of Medical and Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, Henan 450001, People's Republic of China
| | - Zhaoming Lu
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, Henan 450001, People's Republic of China.,Collaborative Innovation Center of Cancer Chemoprevention, Henan Province, Zhengzhou 450001, People's Republic of China
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Abstract
As a double-edged sword, autophagy in cancer cells could either suppress or promote tumorigenesis. Nowadays, more and more natural compounds with autophagy-regulating activities exhibit therapeutic effects against various cancers. N-Heterocycle derivatives plays an important role for discovery new drugs. In this review, we summarize and classify 116 N-heterocycle derivatives with autophagy-regulating activities in the past decade into 12 classes according to structure characteristics. The structural features, bioactivities, mechanism and problems faced in this field are discussed and reported for the first time. Some of these even exhibited outstanding in vivo antitumor activities, including bisaminoquinoline (3), pancratistatin (8), 10-hydroxyevodiamine (18), lycorine (28), piperine (31) and iridium (III) complex (57), which are potential drug candidates for antitumor therapy.
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14
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Oh JY, Kim EH, Lee YJ, Sai S, Lim SH, Park JW, Chung HK, Kim J, Vares G, Takahashi A, Jeong YK, Kim MS, Kong CB. Synergistic Autophagy Effect of miR-212-3p in Zoledronic Acid-Treated In Vitro and Orthotopic In Vivo Models and in Patient-Derived Osteosarcoma Cells. Cancers (Basel) 2019; 11:cancers11111812. [PMID: 31752184 PMCID: PMC6895802 DOI: 10.3390/cancers11111812] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Revised: 11/11/2019] [Accepted: 11/13/2019] [Indexed: 12/19/2022] Open
Abstract
Osteosarcoma (OS) originates from osteoid bone tissues and is prone to metastasis, resulting in a high mortality rate. Although several treatments are available for OS, an effective cure does not exist for most patients with advanced OS. Zoledronic acid (ZOL) is a third-generation bisphosphonate that inhibits osteoclast-mediated bone resorption and has shown efficacy in treating bone metastases in patients with various types of solid tumors. Here, we sought to clarify the mechanisms through which ZOL inhibits OS cell proliferation. ZOL treatment inhibited OS cell proliferation, viability, and colony formation. Autophagy inhibition by RNA interference against Beclin-1 or ATG5 inhibited ZOL-induced OS cell death. ZOL induced autophagy by repressing the protein kinase B/mammalian target of rapamycin/p70S6 kinase pathway and extracellular signal-regulated kinase signaling-dependent autophagy in OS cell lines and patient-derived OS cells. Microarrays of miRNA showed that ZOL increased the levels of miR-212-3p, which is known to play an important role in autophagy, in OS in vitro and in vivo systems. Collectively, our data provided mechanistic insight into how increased miR-212-3p through ZOL treatment induces autophagy synergistically in OS cells, providing a preclinical rationale for conducting a broad-scale clinical evaluation of ZOL + miR-212-3p in treating OS.
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Affiliation(s)
- Ju Yeon Oh
- Laboratory of Biochemistry, School of Life Sciences and Biotechnology, Korea University, Seongbuk-gu, Seoul 136-701, Korea; (J.Y.O.); (J.K.)
- Division of Radiological Science and Clinical Translational Research Korea Cancer Center Hospital, Nowon-gu, Seoul 01812, Korea
| | - Eun Ho Kim
- Department of Biochemistry, School of Medicine, Daegu Catholic University, Nam-gu, Daegu 42472, Korea; (E.H.K.); (S.H.L.)
| | - Yeon-Joo Lee
- Division of Radiation Biomedical Research, Korea Institute of Radiological and Medical Sciences, Seoul 01812, Korea;
| | - Sei Sai
- Department of Basic Medical Sciences for Radiation Damages, National Institute of Radiological Sciences, Chiba 263-8555, Japan;
| | - Sun Ha Lim
- Department of Biochemistry, School of Medicine, Daegu Catholic University, Nam-gu, Daegu 42472, Korea; (E.H.K.); (S.H.L.)
| | - Jang Woo Park
- Korea Drug Development Platform using Radio-isotope, Korea Institute of Radiological & Medical Sciences, Seoul 139-706, Korea; (J.W.P.); (H.K.C.)
| | - Hye Kyung Chung
- Korea Drug Development Platform using Radio-isotope, Korea Institute of Radiological & Medical Sciences, Seoul 139-706, Korea; (J.W.P.); (H.K.C.)
| | - Joon Kim
- Laboratory of Biochemistry, School of Life Sciences and Biotechnology, Korea University, Seongbuk-gu, Seoul 136-701, Korea; (J.Y.O.); (J.K.)
| | - Guillaume Vares
- Cell Signal Unit, Okinawa Institute of Science and Technology Graduate University (OIST), Okinawa 1919-1, Japan;
| | - Akihisa Takahashi
- Gunma University Heavy Ion Medical Center, Maebashi 371-8511, Gunma, Japan;
| | - Youn Kyoung Jeong
- Research Center for Radiotherapy, Korea Institute of Radiological and Medical Sciences, Seoul 139-706, Korea;
| | - Mi-Sook Kim
- Department of Radiation Oncology, Korea Institute of Radiological and Medical Sciences, Seoul 139-706, Korea
- Correspondence: or (M.-S.K.); (C.-B.K.)
| | - Chang-Bae Kong
- Department of Orthopaedic Surgery, Korea Institute of Radiological and Medical Sciences, Seoul 139-706, Korea
- Correspondence: or (M.-S.K.); (C.-B.K.)
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15
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Yang ZM, Yang MF, Yu W, Tao HM. Molecular mechanisms of estrogen receptor β-induced apoptosis and autophagy in tumors: implication for treating osteosarcoma. J Int Med Res 2019; 47:4644-4655. [PMID: 31526167 PMCID: PMC6833400 DOI: 10.1177/0300060519871373] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
The estrogen receptors α (ERα) and β (ERβ) are located in the nucleus and bind to estrogen to initiate transcription of estrogen-responsive genes. In a variety of tumor cells, ERβ has been shown to be a tumor suppressor. In particular, ERβ has anti-proliferative effects in osteosarcoma cells. Additionally, ERβ has been proven to regulate the apoptosis-related molecules IAP, BAX, caspase-3, and PARP, and to act on the NF-κB/BCL-2 pathway to induce apoptosis in tumors. Moreover, ERβ can regulate the expression of the autophagy associated markers LC3-I/LC-3II and p62 and induce autophagy in tumors by inhibiting the PI3K/AKT/mTOR pathway and activating the AMPK pathway. Here, we review the molecular mechanisms by which ERβ induces apoptosis and autophagy in a variety of tumors to further delineate more specific molecular mechanisms underlying osteosarcoma tumorigenesis and pathogenesis. Considering the broad involvement of ERβ in apoptosis, autophagy, and their interaction, it is plausible that the critical role of ERβ in inhibiting the proliferation and metastasis of osteosarcoma cells is closely related to its regulation of apoptosis and autophagy.
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Affiliation(s)
- Zheng-Ming Yang
- Department of Orthopaedics, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Min-Fei Yang
- Department of Emergency, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Wei Yu
- Department of Orthopaedics, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Hui-Min Tao
- Department of Orthopaedics, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
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16
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Antunes F, Erustes AG, Costa AJ, Nascimento AC, Bincoletto C, Ureshino RP, Pereira GJS, Smaili SS. Autophagy and intermittent fasting: the connection for cancer therapy? Clinics (Sao Paulo) 2018; 73:e814s. [PMID: 30540126 PMCID: PMC6257056 DOI: 10.6061/clinics/2018/e814s] [Citation(s) in RCA: 83] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Accepted: 09/25/2018] [Indexed: 01/07/2023] Open
Abstract
Cancer is a leading cause of death worldwide, and its incidence is continually increasing. Although anticancer therapy has improved significantly, it still has limited efficacy for tumor eradication and is highly toxic to healthy cells. Thus, novel therapeutic strategies to improve chemotherapy, radiotherapy and targeted therapy are an important goal in cancer research. Macroautophagy (herein referred to as autophagy) is a conserved lysosomal degradation pathway for the intracellular recycling of macromolecules and clearance of damaged organelles and misfolded proteins to ensure cellular homeostasis. Dysfunctional autophagy contributes to many diseases, including cancer. Autophagy can suppress or promote tumors depending on the developmental stage and tumor type, and modulating autophagy for cancer treatment is an interesting therapeutic approach currently under intense investigation. Nutritional restriction is a promising protocol to modulate autophagy and enhance the efficacy of anticancer therapies while protecting normal cells. Here, the description and role of autophagy in tumorigenesis will be summarized. Moreover, the possibility of using fasting as an adjuvant therapy for cancer treatment, as well as the molecular mechanisms underlying this approach, will be presented.
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Affiliation(s)
- Fernanda Antunes
- Departamento de Farmacologia, Escola Paulista de Medicina, Universidade Federal de Sao Paulo (EPM-UNIFESP), Sao Paulo, SP, BR
| | - Adolfo Garcia Erustes
- Departamento de Farmacologia, Escola Paulista de Medicina, Universidade Federal de Sao Paulo (EPM-UNIFESP), Sao Paulo, SP, BR
| | - Angélica Jardim Costa
- Departamento de Farmacologia, Escola Paulista de Medicina, Universidade Federal de Sao Paulo (EPM-UNIFESP), Sao Paulo, SP, BR
| | - Ana Carolina Nascimento
- Departamento de Farmacologia, Escola Paulista de Medicina, Universidade Federal de Sao Paulo (EPM-UNIFESP), Sao Paulo, SP, BR
| | - Claudia Bincoletto
- Departamento de Farmacologia, Escola Paulista de Medicina, Universidade Federal de Sao Paulo (EPM-UNIFESP), Sao Paulo, SP, BR
| | | | - Gustavo José Silva Pereira
- Departamento de Farmacologia, Escola Paulista de Medicina, Universidade Federal de Sao Paulo (EPM-UNIFESP), Sao Paulo, SP, BR
| | - Soraya Soubhi Smaili
- Departamento de Farmacologia, Escola Paulista de Medicina, Universidade Federal de Sao Paulo (EPM-UNIFESP), Sao Paulo, SP, BR
- *Corresponding author. E-mail:
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17
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Han Y, Fan S, Qin T, Yang J, Sun Y, Lu Y, Mao J, Li L. Role of autophagy in breast cancer and breast cancer stem cells (Review). Int J Oncol 2018; 52:1057-1070. [PMID: 29436618 DOI: 10.3892/ijo.2018.4270] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Accepted: 01/09/2018] [Indexed: 11/05/2022] Open
Abstract
Autophagy is a key catabolic process, in which cytosolic cargo is engulfed by the formation of a double membrane and then degraded through the fusing of autophagosomes with lysosomes. Autophagy is a constitutively active, evolutionarily conserved, catabolic process important for the maintenance of homeostasis in cellular stress responses and cell survival. Although the mechanisms of autophagy have not yet been fully elucidated, emerging evidence suggests that it plays a dual role in breast cancer and in maintaining the activity of breast cancer stem cells (CSCs). However, it may play a complex role in breast CSC therapy. Breast CSCs, a population of cells with the ability to self-renew, differentiate, and initiate and sustain tumor growth, play an essential role in cancer recurrence, anticancer resistance and metastasis. In addition, the elucidation of the association between autophagy and apoptosis in the tumor context is crucial in order to better address appropriate therapy strategies. In the present review, a summary of the mechanisms and roles of autophagy in breast cancer and CSCs is presented. The potential value of such autophagy modulators in the development of novel breast cancer therapies is discussed.
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Affiliation(s)
- Yanyan Han
- Department of Pathology, Dalian Medical University, Liaoning 116044, P.R. China
| | - Shujun Fan
- Department of Pathology, Dalian Medical University, Liaoning 116044, P.R. China
| | - Tao Qin
- Department of Pathology, Dalian Medical University, Liaoning 116044, P.R. China
| | - Jinfeng Yang
- Department of Pathology, Dalian Medical University, Liaoning 116044, P.R. China
| | - Yan Sun
- Department of Pathology, Dalian Medical University, Liaoning 116044, P.R. China
| | - Ying Lu
- Department of Pathology, Dalian Medical University, Liaoning 116044, P.R. China
| | - Jun Mao
- Department of Pathology, Dalian Medical University, Liaoning 116044, P.R. China
| | - Lianhong Li
- Department of Pathology, Dalian Medical University, Liaoning 116044, P.R. China
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18
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Xia T, Wang J, Wang Y, Wang Y, Cai J, Wang M, Chen Q, Song J, Yu Z, Huang W, Fang J. Inhibition of autophagy potentiates anticancer property of 20(S)-ginsenoside Rh2 by promoting mitochondria-dependent apoptosis in human acute lymphoblastic leukaemia cells. Oncotarget 2017; 7:27336-49. [PMID: 27027340 PMCID: PMC5053654 DOI: 10.18632/oncotarget.8285] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2015] [Accepted: 03/01/2016] [Indexed: 01/03/2023] Open
Abstract
Acute lymphoblastic leukaemia (ALL) is the most prevalent childhood malignancy. Although most children with ALL are cured, there is still a group of patients for which therapy fails owing to severe toxicities and drug resistance. Ginsenoside Rh2 (GRh2), a major bioactive component isolated from Panax ginseng, has been shown to have a therapeutic effect on some tumors. However, the molecular mechanisms of cell death induced by 20(S)-GRh2 in ALL cells remains unclear. In this study, we showed that 20(S)-GRh2 inhibited the cell growth and induced mitochondria-dependent apoptosis and autophagy. But it has no cytotoxic effect on human normal blood cells. Furthermore, autophagy plays a protective role in 20(S)-GRh2-induced apoptosis in ALL cell lines and human primary ALL cells. We demonstrated that either genetic or pharmacologic inhibition of autophagy could be more effective in reducing viability and enhancing 20(S)-GRh2-induced toxicity than 20(S)-GRh2 treatment alone. In addition, inhibition of autophagy could aggravate mitochondrial ROS generation and mitochondrial damage, and then accelerate mitochondria-dependent apoptosis. Taken together, these results suggest that inhibition of autophagy can sensitize ALL cells towards 20(S)-GRh2. The appropriate inhibition of autophagy could provide a powerful strategy to increase the potency of 20(S)-GRh2 as a novel anticancer agent for ALL therapy.
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Affiliation(s)
- Ting Xia
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, P.R. China
| | - Jiancheng Wang
- Center for Stem Cell Biology and Tissue Engineering, Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Sun Yat-Sen University, Guangzhou, P.R. China
| | - Yingnan Wang
- Center for Stem Cell Biology and Tissue Engineering, Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Sun Yat-Sen University, Guangzhou, P.R. China
| | - Yuanyuan Wang
- Center for Stem Cell Biology and Tissue Engineering, Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Sun Yat-Sen University, Guangzhou, P.R. China
| | - Jianye Cai
- Center for Stem Cell Biology and Tissue Engineering, Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Sun Yat-Sen University, Guangzhou, P.R. China
| | - Min Wang
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, P.R. China
| | - Qidan Chen
- Department of Chemistry and Pharmacy, Zhuhai College, Jilin University, Zhuhai, P.R. China
| | - Jia Song
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, P.R. China
| | - Ziqi Yu
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, P.R. China
| | - Wei Huang
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, P.R. China
| | - Jianpei Fang
- Department of Pediatrics, Sun Yat-sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, P.R. China.,Key Laboratory of Malignant Tumor Gene Regulation and Target Therapy of Guangdong Higher Education Institutes, Sun Yat-Sen University, Guangzhou, P.R. China
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19
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Ren J, Liu Y, Li L, Zhao Y, Li Z, Wu C, Chen L, Hu K. OAMDP, a novel podophyllotoxin derivative, induces apoptosis, cell cycle arrest and autophagy in hepatoma HepG2 cells. Cell Biol Int 2017; 42:194-204. [DOI: 10.1002/cbin.10892] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2017] [Accepted: 09/30/2017] [Indexed: 12/27/2022]
Affiliation(s)
- Jie Ren
- School of Pharmaceutical Engineering & Life Science; Changzhou University; Changzhou Jiangsu 213164 P. R. China
| | - Yu Liu
- School of Pharmaceutical Engineering & Life Science; Changzhou University; Changzhou Jiangsu 213164 P. R. China
| | - Lixia Li
- School of Pharmaceutical Engineering & Life Science; Changzhou University; Changzhou Jiangsu 213164 P. R. China
| | - Yuexin Zhao
- School of Pharmaceutical Engineering & Life Science; Changzhou University; Changzhou Jiangsu 213164 P. R. China
| | - Zhongyu Li
- School of Pharmaceutical Engineering & Life Science; Changzhou University; Changzhou Jiangsu 213164 P. R. China
| | - Chao Wu
- School of Pharmaceutical Engineering & Life Science; Changzhou University; Changzhou Jiangsu 213164 P. R. China
| | - Lin Chen
- School of Pharmaceutical Engineering & Life Science; Changzhou University; Changzhou Jiangsu 213164 P. R. China
| | - Kun Hu
- School of Pharmaceutical Engineering & Life Science; Changzhou University; Changzhou Jiangsu 213164 P. R. China
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20
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Tesselaar MH, Smit JW, Nagarajah J, Netea-Maier RT, Plantinga TS. Pathological processes and therapeutic advances in radioiodide refractory thyroid cancer. J Mol Endocrinol 2017; 59:R141-R154. [PMID: 28931558 DOI: 10.1530/jme-17-0134] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/12/2017] [Accepted: 09/20/2017] [Indexed: 12/19/2022]
Abstract
While in most patients with non-medullary thyroid cancer (TC), disease remission is achieved by thyroidectomy and ablation of tumor remnants by radioactive iodide (RAI), a substantial subgroup of patients with metastatic disease present tumor lesions that have acquired RAI resistance as a result of dedifferentiation. Although oncogenic mutations in BRAF, TERT promoter and TP53 are associated with an increased propensity for induction of dedifferentiation, the role of genetic and epigenetic aberrations and their effects on important intracellular signaling pathways is not yet fully elucidated. Also immune, metabolic, stemness and microRNA pathways have emerged as important determinants of TC dedifferentiation and RAI resistance. These signaling pathways have major clinical implications since their targeting could inhibit TC progression and could enable redifferentiation to restore RAI sensitivity. In this review, we discuss the current insights into the pathological processes conferring dedifferentiation and RAI resistance in TC and elaborate on novel advances in diagnostics and therapy to improve the clinical outcome of RAI-refractory TC patients.
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Affiliation(s)
- Marika H Tesselaar
- Department of PathologyRadboud University Medical Center, Nijmegen, The Netherlands
| | - Johannes W Smit
- Internal MedicineDivision of Endocrinology Radboud University Medical Center, Nijmegen, The Netherlands
| | - James Nagarajah
- Radiology & Nuclear MedicineRadboud University Medical Center, Nijmegen, The Netherlands
| | - Romana T Netea-Maier
- Internal MedicineDivision of Endocrinology Radboud University Medical Center, Nijmegen, The Netherlands
| | - Theo S Plantinga
- Department of PathologyRadboud University Medical Center, Nijmegen, The Netherlands
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21
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Sung B, Chung HY, Kim ND. Role of Apigenin in Cancer Prevention via the Induction of Apoptosis and Autophagy. J Cancer Prev 2016; 21:216-226. [PMID: 28053955 PMCID: PMC5207605 DOI: 10.15430/jcp.2016.21.4.216] [Citation(s) in RCA: 134] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2016] [Revised: 11/28/2016] [Accepted: 11/29/2016] [Indexed: 12/12/2022] Open
Abstract
Apigenin (4′,5,7-trihydroxyflavone) is a flavonoid commonly found in many fruits and vegetables such as parsley, chamomile, celery, and kumquats. In the last few decades, recognition of apigenin as a cancer chemopreventive agent has increased. Significant progress has been made in studying the chemopreventive aspects of apigenin both in vitro and in vivo. Several studies have demonstrated that the anticarcinogenic properties of apigenin occur through regulation of cellular response to oxidative stress and DNA damage, suppression of inflammation and angiogenesis, retardation of cell proliferation, and induction of autophagy and apoptosis. One of the most well-recognized mechanisms of apigenin is the capability to promote cell cycle arrest and induction of apoptosis through the p53-related pathway. A further role of apigenin in chemoprevention is the induction of autophagy in several human cancer cell lines. In this review, we discuss the details of apigenin, apoptosis, autophagy, and the role of apigenin in cancer chemoprevention via the induction of apoptosis and autophagy.
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Affiliation(s)
- Bokyung Sung
- Department of Pharmacy, College of Pharmacy, Molecular Inflammation Research Center for Aging Intervention, Pusan National University, Busan, Korea
| | - Hae Young Chung
- Department of Pharmacy, College of Pharmacy, Molecular Inflammation Research Center for Aging Intervention, Pusan National University, Busan, Korea
| | - Nam Deuk Kim
- Department of Pharmacy, College of Pharmacy, Molecular Inflammation Research Center for Aging Intervention, Pusan National University, Busan, Korea
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22
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Gil J, Ramsey D, Szmida E, Leszczynski P, Pawlowski P, Bebenek M, Sasiadek MM. The BAX gene as a candidate for negative autophagy-related genes regulator on mRNA levels in colorectal cancer. Med Oncol 2016; 34:16. [PMID: 28035578 PMCID: PMC5199770 DOI: 10.1007/s12032-016-0869-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Accepted: 12/09/2016] [Indexed: 02/07/2023]
Abstract
Autophagy is a catabolic process, which is involved in the maintenance of intracellular homeostasis by degrading redundant molecules and organelles. Autophagy begins with the formation of a double-membrane phagophore, followed by its enclosure, thus leading to the appearance of an autophagosome which fuses with lysosome. This process is highly conserved, precisely orchestrated and regulated by autophagy-related genes. Recently, autophagy has been widely studied in different types of cancers, including colorectal cancer. As it has been revealed, autophagy plays two opposite roles in tumorigenesis, as a tumor suppressor and a tumor enhancer/activator, and therefore is called a double-edge sword. Recently, interaction between autophagy and apoptosis has been found. Therefore, we aimed to study the mRNA levels of genes engaged in autophagy and apoptosis in colorectal cancer tissues. Colorectal cancer and adjacent healthy tissues were obtained from 73 patients diagnosed with primary colorectal cancer. Real-time PCR analysis employing Universal Probe Library was used to assess the expression of the seven following selected genes: BECN1, UVRAG, ULK1, ATG13, Bif-1, BCL2 and BAX. For all but one of the tested genes, a decrease in expression was observed. An increase in expression was observed for BAX. BAX expression decreases consistently from early to more advanced stages. High expression of BAX was strongly associated with negative UVRAG expression. The high expression of the BAX gene seems to be a negative regulator of autophagy in colorectal cancer cells. The relative downregulation of autophagy-related genes was observed in colorectal cancer samples.
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Affiliation(s)
- Justyna Gil
- Department of Genetics, Wroclaw Medical University, 50-368, Wroclaw, Poland.
| | - David Ramsey
- Department of Operations Research, Wroclaw University of Technology, 50-372, Wroclaw, Poland
| | - Elzbieta Szmida
- Department of Genetics, Wroclaw Medical University, 50-368, Wroclaw, Poland
| | - Przemyslaw Leszczynski
- Department of Biology and Medical Parasitology, Wroclaw Medical University, 50-345, Wroclaw, Poland
| | - Pawel Pawlowski
- Department of Genetics, Wroclaw Medical University, 50-368, Wroclaw, Poland
| | - Marek Bebenek
- First Department of Surgical Oncology, Lower Silesian Oncology Center, 53-413, Wroclaw, Poland
| | - Maria M Sasiadek
- Department of Genetics, Wroclaw Medical University, 50-368, Wroclaw, Poland
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23
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Koceva-Chyła A, Matczak K, Hikisz MP, Durka MK, Kochel MK, Süss-Fink G, Furrer J, Kowalski K. Insights into the in vitro Anticancer Effects of Diruthenium-1. ChemMedChem 2016; 11:2171-2187. [DOI: 10.1002/cmdc.201600315] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2016] [Indexed: 01/22/2023]
Affiliation(s)
- Aneta Koceva-Chyła
- Department of Medical Biophysics; Faculty of Biology and Environmental Protection; University of Łódź; Pomorska St. 141/143 90236 Łódź Poland
| | - Karolina Matczak
- Department of Medical Biophysics; Faculty of Biology and Environmental Protection; University of Łódź; Pomorska St. 141/143 90236 Łódź Poland
| | - Msc. Paweł Hikisz
- Department of Medical Biophysics; Faculty of Biology and Environmental Protection; University of Łódź; Pomorska St. 141/143 90236 Łódź Poland
| | - Msc. Kamil Durka
- Department of Medical Biophysics; Faculty of Biology and Environmental Protection; University of Łódź; Pomorska St. 141/143 90236 Łódź Poland
| | - Msc. Krzysztof Kochel
- Department of Medical Biophysics; Faculty of Biology and Environmental Protection; University of Łódź; Pomorska St. 141/143 90236 Łódź Poland
| | - Georg Süss-Fink
- Institut de Chimie; Université de Neuchâtel; Avenue de Bellevaux 51 2000 Neuchâtel Switzerland
| | - Julien Furrer
- Department für Chemie und Biochemie; Universität Bern; Freiestrasse 3 3012 Bern Switzerland
| | - Konrad Kowalski
- Department of Organic Chemistry; Faculty of Chemistry; University of Łódź; Tamka St. 12 91403 Łódź Poland
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24
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Tu P, Huang Q, Ou Y, Du X, Li K, Tao Y, Yin H. Aloe-emodin-mediated photodynamic therapy induces autophagy and apoptosis in human osteosarcoma cell line MG‑63 through the ROS/JNK signaling pathway. Oncol Rep 2016; 35:3209-15. [PMID: 27035222 PMCID: PMC4872276 DOI: 10.3892/or.2016.4703] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2015] [Accepted: 02/12/2016] [Indexed: 12/31/2022] Open
Abstract
The present study was carried out to investigate the effect and mechanisms of aloe-emodin (AE)-mediated photodynamic therapy (AE-PDT) on the human osteosarcoma cell line MG-63. After treatment with AE-PDT, the human osteosarcoma cell line MG-63 was tested for levels of viability, autophagy, reactive oxygen species (ROS) and apoptosis and changes in cell morphology with the Cell Counting Kit-8 (CCK-8), monodansylcadaverine (MDC) and Hoechst staining and transmission electron microscopy. The expression of proteins including LC-3, cleaved caspase-3, Beclin-1, Bcl-2, p-JNK, t-JNK and β-actin was examined with western blotting. AE-PDT significantly inhibited the viability of the MG-63 cells in an AE-concentration- and PDT energy density-dependent manner. Autophagy and apoptosis of MG-63 cells was substantially promoted in the AE-PDT group compared to the control group, the AE alone group and the light emitting diode (LED) alone group. Inhibition of autophagy by 3-meth-yladenine (3-MA) (5 mM) and chloroquine (CQ) (15 µM) significantly promoted the apoptosis rate and improved the sensitivity of the MG-63 cells to AE-PDT. AE-PDT was found to induce the expression of ROS and p-JNK. ROS scavenger, N-acetyl-L-cysteine (NAC, 5 mM), was able to hinder the autophagy, apoptosis and phosphorylation of JNK, and JNK inhibitor (SP600125, 10 µM) significantly inhibited the autophagy and apoptosis, and attenuated the sensitivity of MG63 cells to AE-PDT. In conclusion, AE-PDT induced the autophagy and apoptosis of human osteosarcoma cell line MG-63 through the activation of the ROS-JNK signaling pathway. Autophagy may play a protective role during the early stage following treatment of AE-PDT.
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Affiliation(s)
- Pinghua Tu
- Department of Orthopedics, The First Affiliated Hospital of Chongqing Medical University, Yuzhong, Chongqing 400016, P.R. China
| | - Qiu Huang
- Department of Orthopedics, The First Affiliated Hospital of Chongqing Medical University, Yuzhong, Chongqing 400016, P.R. China
| | - Yunsheng Ou
- Department of Orthopedics, The First Affiliated Hospital of Chongqing Medical University, Yuzhong, Chongqing 400016, P.R. China
| | - Xing Du
- Department of Orthopedics, The First Affiliated Hospital of Chongqing Medical University, Yuzhong, Chongqing 400016, P.R. China
| | - Kaiting Li
- Department of Orthopedics, The First Affiliated Hospital of Chongqing Medical University, Yuzhong, Chongqing 400016, P.R. China
| | - Yong Tao
- Department of Orthopedics, The First Affiliated Hospital of Chongqing Medical University, Yuzhong, Chongqing 400016, P.R. China
| | - Hang Yin
- Department of Orthopedics, The First Affiliated Hospital of Chongqing Medical University, Yuzhong, Chongqing 400016, P.R. China
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Nowacki L, Vigneron P, Rotellini L, Cazzola H, Merlier F, Prost E, Ralanairina R, Gadonna JP, Rossi C, Vayssade M. Betanin-Enriched Red Beetroot (Beta vulgaris L.) Extract Induces Apoptosis and Autophagic Cell Death in MCF-7 Cells. Phytother Res 2015; 29:1964-73. [PMID: 26463240 DOI: 10.1002/ptr.5491] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2015] [Revised: 07/27/2015] [Accepted: 09/21/2015] [Indexed: 01/01/2023]
Abstract
Recent studies have pointed out the preventive role of beetroot extracts against cancers and their cytotoxic activity on cancer cells. Among many different natural compounds, these extracts contained betanin and its stereoisomer isobetanin, which belongs to the betalain group of highly bioavailable antioxidants. However, a precise identification of the molecules responsible for this tumor-inhibitory effect was still required. We isolated a betanin/isobetanin concentrate from fresh beetroots, corresponding to the highest purified betanin extract used for studying anticancer activities of these molecules. The cytotoxicity of this betanin-enriched extract was then characterized on cancer and normal cells and we highlighted the death signalling pathways involved. Betanin/isobetanin concentrate significantly decreased cancer cell proliferation and viability. Particularly in MCF-7-treated cells, the expressions of apoptosis-related proteins (Bad, TRAILR4, FAS, p53) were strongly increased and the mitochondrial membrane potential was altered, demonstrating the involvement of both intrinsic and extrinsic apoptotic pathways. Autophagosome vesicles in MCF-7-treated cells were observed, also suggesting autophagic cell death upon betanin/isobetanin treatment. Importantly, the betanin-enriched extract had no obvious effect towards normal cell lines. Our data bring new insight to consider the betanin/isobetanin mix as therapeutic anticancer compound, alone or in combination with classical chemotherapeutic drugs, especially in functional p53 tumors.
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Affiliation(s)
- Laëtitia Nowacki
- Sorbonne Universités, Université de Technologie de Compiègne, CNRS, Unité Génie Enzymatique et Cellulaire, Centre de Recherche Royallieu, CS 60319, Compiègne cedex, 60203, France.,Sorbonne Universités, Université de Technologie de Compiègne, CNRS, UMR 7338 Biomécanique et Bioingénierie, Centre de Recherche Royallieu, CS 60319, Compiègne cedex, 60203, France
| | - Pascale Vigneron
- Sorbonne Universités, Université de Technologie de Compiègne, CNRS, UMR 7338 Biomécanique et Bioingénierie, Centre de Recherche Royallieu, CS 60319, Compiègne cedex, 60203, France
| | - Laura Rotellini
- Sorbonne Universités, Université de Technologie de Compiègne, CNRS, UMR 7338 Biomécanique et Bioingénierie, Centre de Recherche Royallieu, CS 60319, Compiègne cedex, 60203, France
| | - Hélène Cazzola
- Sorbonne Universités, Université de Technologie de Compiègne, CNRS, Unité Génie Enzymatique et Cellulaire, Centre de Recherche Royallieu, CS 60319, Compiègne cedex, 60203, France
| | - Franck Merlier
- Sorbonne Universités, Université de Technologie de Compiègne, CNRS, Unité Génie Enzymatique et Cellulaire, Centre de Recherche Royallieu, CS 60319, Compiègne cedex, 60203, France
| | - Elise Prost
- Sorbonne Universités, Université de Technologie de Compiègne, CNRS, Unité Génie Enzymatique et Cellulaire, Centre de Recherche Royallieu, CS 60319, Compiègne cedex, 60203, France
| | - Robert Ralanairina
- Institut Polytechnique LaSalle Beauvais, Département STAI, rue Pierre Waguet, BP 30313, Beauvais, 60026, France
| | - Jean-Pierre Gadonna
- Institut Polytechnique LaSalle Beauvais, Département STAI, rue Pierre Waguet, BP 30313, Beauvais, 60026, France
| | - Claire Rossi
- Sorbonne Universités, Université de Technologie de Compiègne, CNRS, Unité Génie Enzymatique et Cellulaire, Centre de Recherche Royallieu, CS 60319, Compiègne cedex, 60203, France
| | - Muriel Vayssade
- Sorbonne Universités, Université de Technologie de Compiègne, CNRS, UMR 7338 Biomécanique et Bioingénierie, Centre de Recherche Royallieu, CS 60319, Compiègne cedex, 60203, France
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Alphitolic acid, an anti-inflammatory triterpene, induces apoptosis and autophagy in oral squamous cell carcinoma cells, in part, through a p53-dependent pathway. J Funct Foods 2015. [DOI: 10.1016/j.jff.2015.07.017] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
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LV XIAOQIN, LIU FANG, SHANG YUE, CHEN SHUZHEN. Honokiol exhibits enhanced antitumor effects with chloroquine by inducing cell death and inhibiting autophagy in human non-small cell lung cancer cells. Oncol Rep 2015; 34:1289-300. [DOI: 10.3892/or.2015.4091] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2015] [Accepted: 06/03/2015] [Indexed: 11/06/2022] Open
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Vizcaíno C, Rodríguez-Sánchez MA, Núñez LE, Morís F, Portugal J. Cytotoxic effects of mithramycin DIG-MSK can depend on the rise of autophagy. Toxicol In Vitro 2015; 29:1537-44. [PMID: 26079942 DOI: 10.1016/j.tiv.2015.06.008] [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: 03/11/2015] [Revised: 06/11/2015] [Accepted: 06/12/2015] [Indexed: 11/29/2022]
Abstract
DIG-MSK (demycarosil-3D-β-D-digitoxosyl mithramycin SK; EC-8042), a novel analogue of mithramycin A, induced autophagy in HCT116 human colon carcinoma and, to a lesser extent, in A2780 human ovarian carcinoma cell lines, which was followed by apoptosis and/or necrotic cell death in a time-dependent way. The effects of DIG-MSK included changes in the expression of a set of genes involved in autophagy, the progression of cells through the different phases of cell cycle, and their halting at the checkpoints. Cells treated with the glucose analogue 2-DG (2-deoxy-D-glucose), which induces autophagy because it impairs cell metabolism, or co-treated with 2-DG plus DIG-MSK, also showed altered gene expression and autophagy. In A2780 cells, some genes involved in autophagy were down-regulated by the different treatments, yet the levels of the proteins they encode could be enough to ensure autophagic flux. In HCT116 cells, up-regulation of several pro-autophagic genes resulted in strong autophagic response. Acidic cell organelles and autophagic flux were more evident in HCT116 than in A2780 cells. DIG-MSK was still cytotoxic in cells that underwent autophagy induced by 2-DG. Therefore, we verified that autophagy resulting from a stress response did not protect cells against DIG-MSK, but, instead, autophagy promoted by either 2-DG or the novel mithralogue can enhance the antitumour activity, which depended on the cell type.
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Affiliation(s)
- Carolina Vizcaíno
- Instituto de Biología Molecular de Barcelona, CSIC, Parc Cientific de Barcelona, Barcelona, Spain
| | | | | | | | - José Portugal
- Instituto de Biología Molecular de Barcelona, CSIC, Parc Cientific de Barcelona, Barcelona, Spain.
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Chuang WL, Su CC, Lin PY, Lin CC, Chen YL. Sann-Joong-Kuey-Jian-Tang induces autophagy in HepG2 cells via regulation of the phosphoinositide-3 kinase/Akt/mammalian target of rapamycin and p38 mitogen-activated protein kinase pathways. Mol Med Rep 2015; 12:1677-84. [PMID: 25847489 PMCID: PMC4464480 DOI: 10.3892/mmr.2015.3573] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2014] [Accepted: 02/23/2015] [Indexed: 12/31/2022] Open
Abstract
Sann-Joong-Kuey-Jian-Tang (SJKJT), a traditional Chinese medicine, was previously reported to induce autophagy and inhibit the proliferation of the human HepG2 hepatocellular carcinoma cell line via an extrinsic pathway. In the present study, the effects of SJKJT-induced autophagy and the cytotoxic mechanisms mediating these effects were investigated in HepG2 cells. The cytotoxicity of SJKJT in the HepG2 cells was evaluated using a 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay. The results demonstrated that the half-maximal inhibitory concentration of SJKJT was 2.91 mg/ml at 24 h, 1.64 mg/ml at 48 h and 1.26 mg/ml at 72 h. The results of confocal fluorescence microscopy indicated that SJKJT resulted in the accumulation of green fluorescent protein-LC3 and vacuolation of the cytoplasm. Flow cytometric analysis revealed the accumulation of acidic vesicular organelles. Furthermore, western blot analysis, used to determine the expression levels of autophagy-associated proteins, demonstrated that the HepG2 cells treated with SJKJT exhibited LC3B-I/LC3B-II conversion, increased expression levels of Beclin, Atg-3 and Atg-5 and reduced expression levels of p62 and decreased signaling of the phosphoinositide-3 kinase/Akt/mammalian target of rapamycin and the p38 mitogen-activated protein kinase pathways. Taken together, these findings may assist in the development of novel chemotherapeutic agents for the treatment of malignant types of liver cancer.
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Affiliation(s)
- Wan-Ling Chuang
- Transplant Medicine and Surgery Research Centre, Changhua Christian Hospital, Changhua 50006, Taiwan, R.O.C
| | - Chin-Cheng Su
- Department of Surgery, Changhua Christian Hospital, Changhua 50006, Taiwan, R.O.C
| | - Ping-Yi Lin
- Transplant Medicine and Surgery Research Centre, Changhua Christian Hospital, Changhua 50006, Taiwan, R.O.C
| | - Chi-Chen Lin
- Institute of Biomedical Science, National Chung-Hsing University, Taichung 40227, Taiwan, R.O.C
| | - Yao-Li Chen
- Transplant Medicine and Surgery Research Centre, Changhua Christian Hospital, Changhua 50006, Taiwan, R.O.C
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Apostolova N, Victor VM. Molecular strategies for targeting antioxidants to mitochondria: therapeutic implications. Antioxid Redox Signal 2015; 22:686-729. [PMID: 25546574 PMCID: PMC4350006 DOI: 10.1089/ars.2014.5952] [Citation(s) in RCA: 180] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Mitochondrial function and specifically its implication in cellular redox/oxidative balance is fundamental in controlling the life and death of cells, and has been implicated in a wide range of human pathologies. In this context, mitochondrial therapeutics, particularly those involving mitochondria-targeted antioxidants, have attracted increasing interest as potentially effective therapies for several human diseases. For the past 10 years, great progress has been made in the development and functional testing of molecules that specifically target mitochondria, and there has been special focus on compounds with antioxidant properties. In this review, we will discuss several such strategies, including molecules conjugated with lipophilic cations (e.g., triphenylphosphonium) or rhodamine, conjugates of plant alkaloids, amino-acid- and peptide-based compounds, and liposomes. This area has several major challenges that need to be confronted. Apart from antioxidants and other redox active molecules, current research aims at developing compounds that are capable of modulating other mitochondria-controlled processes, such as apoptosis and autophagy. Multiple chemically different molecular strategies have been developed as delivery tools that offer broad opportunities for mitochondrial manipulation. Additional studies, and particularly in vivo approaches under physiologically relevant conditions, are necessary to confirm the clinical usefulness of these molecules.
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Affiliation(s)
- Nadezda Apostolova
- 1 Faculty of Health Sciences, University Jaume I , Castellón de la Plana, Spain
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Min A, Im SA, Kim DK, Song SH, Kim HJ, Lee KH, Kim TY, Han SW, Oh DY, Kim TY, O'Connor MJ, Bang YJ. Histone deacetylase inhibitor, suberoylanilide hydroxamic acid (SAHA), enhances anti-tumor effects of the poly (ADP-ribose) polymerase (PARP) inhibitor olaparib in triple-negative breast cancer cells. Breast Cancer Res 2015; 17:33. [PMID: 25888415 PMCID: PMC4425881 DOI: 10.1186/s13058-015-0534-y] [Citation(s) in RCA: 131] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2014] [Accepted: 02/10/2015] [Indexed: 12/19/2022] Open
Abstract
Introduction Olaparib, a poly (ADP-ribose) polymerase (PARP) inhibitor, has been found to have therapeutic potential for treating cancers associated with impaired DNA repair capabilities, particularly those with deficiencies in the homologous recombination repair (HRR) pathway. Histone deacetylases (HDACs) are important for enabling functional HRR of DNA by regulating the expression of HRR-related genes and promoting the accurate assembly of HRR-directed sub-nuclear foci. Thus, HDAC inhibitors have recently emerged as a therapeutic agent for treating cancer by inhibiting DNA repair. Based on this, HDAC inhibition could be predicted to enhance the anti-tumor effect of PARP inhibitors in cancer cells by blocking the HRR pathway. Methods We determined whether suberoylanilide hydroxamic acid (SAHA), a HDAC inhibitor, could enhance the anti-tumor effects of olaparib on breast cancer cell lines using a cytotoxic assay, cell cycle analysis, and Western blotting. We evaluated how exposure to SAHA affects the expression of HRR-associated genes. The accumulation of DNA double strand breaks (DSBs) induced by combination treatment was assessed. Induction of autophagy was monitored by imaging green fluorescent protein-tagged microtubule-associated protein 1A/1B-light chain 3 (LC3) expression following co-treatment with olaparib and SAHA. These in vitro data were validated in vivo using a human breast cancer xenograft model. Results Triple-negative breast cancer cell (TNBC) lines showed heterogeneous responses to the PARP and HDAC inhibitors. Co-administration of olaparib and SAHA synergistically inhibited the growth of TNBC cells that expressed functional Phosphatase and tensin homolog (PTEN). This effect was associated with down-regulation of the proliferative signaling pathway, increased apoptotic and autophagic cell death, and accumulation of DNA damage. The combined anti-tumor effect of olaparib and SAHA was also observed in a xenograft model. These data suggest that PTEN expression in TNBC cells can sensitize the cell response to simultaneous inhibition of PARP and HDAC both in vitro and in vivo. Conclusion Our findings suggest that expression of functional PTEN may serve as a biomarker for selecting TNBC patients that would favorably respond to a combination of olaparib with SAHA. This provides a strong rationale for treating TNBC patients with PTEN expression with a combination therapy consisting of olaparib and SAHA. Electronic supplementary material The online version of this article (doi:10.1186/s13058-015-0534-y) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Ahrum Min
- Cancer Research Institute, Seoul National University College of Medicine, Seoul, 110-799, Korea. .,Biomedical Research Institute, Seoul National University Hospital, Seoul, 110-799, Korea.
| | - Seock-Ah Im
- Cancer Research Institute, Seoul National University College of Medicine, Seoul, 110-799, Korea. .,Department of Internal Medicine, Seoul National University College of Medicine, Seoul, 110-799, Korea. .,Biomedical Research Institute, Seoul National University Hospital, Seoul, 110-799, Korea.
| | | | - Sang-Hyun Song
- Cancer Research Institute, Seoul National University College of Medicine, Seoul, 110-799, Korea.
| | - Hee-Jun Kim
- Cancer Research Institute, Seoul National University College of Medicine, Seoul, 110-799, Korea. .,Department of Internal Medicine, Chung Ang University College of Medicine, Seoul, 156-755, Korea.
| | - Kyung-Hun Lee
- Cancer Research Institute, Seoul National University College of Medicine, Seoul, 110-799, Korea. .,Department of Internal Medicine, Seoul National University College of Medicine, Seoul, 110-799, Korea. .,Biomedical Research Institute, Seoul National University Hospital, Seoul, 110-799, Korea.
| | - Tae-Yong Kim
- Cancer Research Institute, Seoul National University College of Medicine, Seoul, 110-799, Korea. .,Department of Internal Medicine, Seoul National University College of Medicine, Seoul, 110-799, Korea. .,Biomedical Research Institute, Seoul National University Hospital, Seoul, 110-799, Korea.
| | - Sae-Won Han
- Cancer Research Institute, Seoul National University College of Medicine, Seoul, 110-799, Korea. .,Department of Internal Medicine, Seoul National University College of Medicine, Seoul, 110-799, Korea. .,Biomedical Research Institute, Seoul National University Hospital, Seoul, 110-799, Korea.
| | - Do-Youn Oh
- Cancer Research Institute, Seoul National University College of Medicine, Seoul, 110-799, Korea. .,Department of Internal Medicine, Seoul National University College of Medicine, Seoul, 110-799, Korea. .,Biomedical Research Institute, Seoul National University Hospital, Seoul, 110-799, Korea.
| | - Tae-You Kim
- Cancer Research Institute, Seoul National University College of Medicine, Seoul, 110-799, Korea. .,Department of Internal Medicine, Seoul National University College of Medicine, Seoul, 110-799, Korea. .,Biomedical Research Institute, Seoul National University Hospital, Seoul, 110-799, Korea.
| | | | - Yung-Jue Bang
- Cancer Research Institute, Seoul National University College of Medicine, Seoul, 110-799, Korea. .,Department of Internal Medicine, Seoul National University College of Medicine, Seoul, 110-799, Korea. .,Biomedical Research Institute, Seoul National University Hospital, Seoul, 110-799, Korea.
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Mansilla S, Vizcaíno C, Rodríguez-Sánchez MA, Priebe W, Portugal J. Autophagy modulates the effects of bis-anthracycline WP631 on p53-deficient prostate cancer cells. J Cell Mol Med 2015; 19:786-98. [PMID: 25689150 PMCID: PMC4395193 DOI: 10.1111/jcmm.12402] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2014] [Accepted: 07/18/2014] [Indexed: 12/19/2022] Open
Abstract
Treatment of p53-deficient PC-3 human prostate carcinoma cells with nanomolar concentrations of bis-anthracycline WP631 induced changes in gene expression, which resulted in G2/M cell cycle arrest, autophagy and cell death. The presence of 2-deoxy-D-glucose (2-DG), which induces metabolic stress and autophagy, enhanced the antiproliferative effects of WP631. Changes induced by WP631, 2-DG, or co-treatments with both compounds, in the expression of a variety of genes involved in autophagy and apoptosis were quantified by real-time PCR. They were consistent with a raise in autophagy followed by cell death. Some cells dying from G2/M phase showed features of necrosis like early changes in membrane permeability, while others were dying by apoptosis that occurred in presence of little caspase-3 activity. Our results indicate that WP631 is not only an antiproliferative agent acting on gene transcription, but it can also induce autophagy regardless of the presence of other pro-autophagy stimuli. The development of autophagy seemed to improve the cytotoxicity of WP631 in PC-3 cells. Our results indicate that autophagy would enhance the activity of DNA-binding drugs like WP631 that are potent inhibitors of gene transcription.
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Affiliation(s)
- Sylvia Mansilla
- Instituto de Biología Molecular de Barcelona, CSIC, Parc Científic de Barcelona, Barcelona, Spain
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33
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Wang L, Li MD, Cao PP, Zhang CF, Huang F, Xu XH, Liu BL, Zhang M. Astin B, a cyclic pentapeptide from Aster tataricus, induces apoptosis and autophagy in human hepatic L-02 cells. Chem Biol Interact 2014; 223:1-9. [DOI: 10.1016/j.cbi.2014.09.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2014] [Revised: 08/21/2014] [Accepted: 09/04/2014] [Indexed: 12/18/2022]
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Abstract
Chloroquine is an established antimalarial agent that has been recently tested in clinical trials for its anticancer activity. The favorable effect of chloroquine appears to be due to its ability to sensitize cancerous cells to chemotherapy, radiation therapy, and induce apoptosis. The present study investigated the interaction of zinc ions with chloroquine in a human ovarian cancer cell line (A2780). Chloroquine enhanced zinc uptake by A2780 cells in a concentration-dependent manner, as assayed using a fluorescent zinc probe. This enhancement was attenuated by TPEN, a high affinity metal-binding compound, indicating the specificity of the zinc uptake. Furthermore, addition of copper or iron ions had no effect on chloroquine-induced zinc uptake. Fluorescent microscopic examination of intracellular zinc distribution demonstrated that free zinc ions are more concentrated in the lysosomes after addition of chloroquine, which is consistent with previous reports showing that chloroquine inhibits lysosome function. The combination of chloroquine with zinc enhanced chloroquine's cytotoxicity and induced apoptosis in A2780 cells. Thus chloroquine is a zinc ionophore, a property that may contribute to chloroquine's anticancer activity.
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Liu Y, Wan ST, Zhang P, Zhang WX, Zheng JL, Lin JX, Li YP. Expression levels of autophagy related proteins and their prognostic significance in retinocytoma and retinoblastoma. Int J Ophthalmol 2014; 7:594-601. [PMID: 25161927 DOI: 10.3980/j.issn.2222-3959.2014.04.02] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2013] [Accepted: 05/09/2014] [Indexed: 01/14/2023] Open
Abstract
AIM To discuss the prognostic significant of autophagy related proteins (ARPs) in retinoblastoma (RB) and to find the molecular marker to distinguish retinocytoma (RC) and RB by investigating the different expression profiling of microtubule-associated protein light chain 3 (LC3B) and other ARPs in RC and RB. METHODS Specimens with retinocytoma region (RCR) or mainly composed with Flexner-Winterstein rosettes (FWR) were screen out from 219 paraffin-embedded RB samples and respectively taken as RCR group and FWR group. Others were taken as undifferentiated (UD) group. Immunochemistry (IHC) of LC3B and electronic microscopy was used to identify autophagy. The IHC scores of LC3B and other ARPs, such as Beclin, PTEN, p27, p16(INK4a), mTOR and BCL-2 were compared and correlation analysis was applied to find potential proteins which may involve in autophagy regulation. The prognostics significance of LC3B was evaluated by comparing the high risk features (HRFs) in 3 groups of total 219 samples. RESULTS Twenty-one specimens with RCR and 36 specimens mainly composed with FWR were screen out. RCR cell had a high level of LC3B and lots of autophagic vacuoles. Beclin, PTEN, p27 had positive correlation with LC3, and p16(INK4a) had negative correlation, while the expression of mTOR and BCL-2 in RCR and RB region did not show any difference. Cases with RCR had lower rate of HRFs than undifferentiated cases. CONCLUSION ARPs had different expression pattern between RCR and other pathological types of RB, and could be ideal markers to distinguish RC from RB. Our finding indicated cases with RCR had favorable prognosis just like those with FWR.
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Affiliation(s)
- Yue Liu
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, Guangdong Province, China
| | - Shang-Tao Wan
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, Guangdong Province, China
| | - Ping Zhang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, Guangdong Province, China
| | - Wen-Xin Zhang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, Guangdong Province, China
| | - Jian-Ling Zheng
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, Guangdong Province, China
| | - Jian-Xian Lin
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, Guangdong Province, China
| | - Yong-Ping Li
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, Guangdong Province, China
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Shen S, Zhang Y, Zhang R, Tu X, Gong X. Ursolic acid induces autophagy in U87MG cells via ROS-dependent endoplasmic reticulum stress. Chem Biol Interact 2014; 218:28-41. [PMID: 24802810 DOI: 10.1016/j.cbi.2014.04.017] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2014] [Revised: 03/20/2014] [Accepted: 04/23/2014] [Indexed: 12/19/2022]
Abstract
Malignant gliomas are the most common primary brain tumors, and novel ways of treating gliomas are urgently needed. Ursolic acid (UA), a pentacyclic triterpenoid, has been reported to exhibit promising antitumor activity. Here, we evaluated the effects of UA on U87MG cells and explored the underlying molecular mechanisms. The results demonstrated that both G1-phase arrest and autophagy were induced by UA in U87MG cells. Evidence of UA-induced autophagy included the formation of acidic vesicular organelles, increase of autophagolysosomes and LC3-II accumulation. UA was also found to induce ER stress and an increase in intracellular calcium accompanied by ROS production. The increase in free cytosolic calcium induced by UA activated the CaMKK-AMPK-mTOR kinase signaling cascade, which ultimately triggered autophagy. Western blot analysis showed that UA promoted the phosphorylation of PERK and eIF2α; this was followed by the upregulation of the downstream protein CHOP, implying the involvement of the ER stress-mediated PERK/eIF2α/CHOP pathway in glioma cells. Meanwhile, UA activated IRE1α and subsequently increased the levels of phosphorylated JNK and Bcl-2, resulting in the dissociation of Beclin1 from Bcl-2. Furthermore, TUDCA and the silencing of either PERK or IRE1α partially blocked the UA-induced accumulation of LC3-II, suggesting that ER stress precedes the process of autophagy. Additionally, NAC attenuated the UA-induced elevation in cytosolic calcium, ER stress markers and autophagy-related proteins, indicating that UA triggered ER stress and autophagy via a ROS-dependent pathway. Collectively, our findings revealed a novel cellular mechanism triggered by UA and provide a molecular basis for developing UA into a drug candidate.
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Affiliation(s)
- Shuying Shen
- The Institute of Biochemistry, Zhejiang University, Hangzhou 310058, China.
| | - Yi Zhang
- The Institute of Biochemistry, Zhejiang University, Hangzhou 310058, China.
| | - Rui Zhang
- Department of Neurosurgery, The First Affiliated Hospital of Nanjing Medical University, No. 300 Guangzhou Road, Nanjing 210029, China.
| | - Xintao Tu
- The Institute of Biochemistry, Zhejiang University, Hangzhou 310058, China
| | - Xingguo Gong
- The Institute of Biochemistry, Zhejiang University, Hangzhou 310058, China.
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Palmeira dos Santos C, Pereira GJS, Barbosa CMV, Jurkiewicz A, Smaili SS, Bincoletto C. Comparative study of autophagy inhibition by 3MA and CQ on Cytarabine‑induced death of leukaemia cells. J Cancer Res Clin Oncol 2014; 140:909-20. [PMID: 24659340 DOI: 10.1007/s00432-014-1640-4] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2014] [Accepted: 03/06/2014] [Indexed: 12/21/2022]
Abstract
BACKGROUND As the molecular mechanisms of Cytarabine,one of the most important drugs used in the leukaemia’s treatment, are only partially understood and the role of autophagy on leukaemia development and treatment is only recently being investigated, in this study, by using Chloroquine (CQ) and 3-methyladenine (3MA) as autophagy inhibitors, we aim to evaluate the contribution of an autophagic mechanism to Cytarabine (AraC)-induced death of HL60 leukaemia cells. METHODS Trypan blue exclusion and AnnexinV/PI assays were used to evaluate HL60 cell death under AraC treatment in the presence or absence of 3MA and CQ. Western blotting and immunofluorescence experiments were performed to show the involvement of apoptosis and autophagy protein expressions. Phenotypic characterization of HL60-treated cells was performed by using immunophenotyping. Clonogenic assays were applied to analyse clonal function of HL60-treated cells. RESULTS We observed that although autophagy inhibition by 3MA, but not CQ, increased the death of HL60 AraC cells after 24 h of treatment, no significant differences between AraC and AraC + 3MA-treated groups were observed by using clonogenic assay. In addition, increased number of immature (CD34(+)/CD38(−)Lin(−/low)) HL60 cells was found in AraC and AraC-3MA groups when compared with control untreated cells. CONCLUSIONS Although AraC anti-leukaemia effects could be potentiated by 3MA autophagy inhibition after 24 h of exposure, leukaemia cell resistance, the main causes of treatment failure, is also promoted by autophagy initial stage impairment by 3MA, denoting the complex role of autophagy in leukaemia cells’ response to chemotherapy.
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Rubella virus perturbs autophagy. Med Microbiol Immunol 2014; 203:323-31. [PMID: 24824868 DOI: 10.1007/s00430-014-0340-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2014] [Accepted: 05/02/2014] [Indexed: 12/17/2022]
Abstract
Autophagy is a cellular catabolic process implicated in numerous physiological processes and pathological conditions, including infections. Viruses have evolved different strategies to modulate the autophagic process. Since the effects of rubella virus (RV) on autophagy have not yet been reported, we evaluated the autophagic activity in the Statens Seruminstitut Rabbit Cornea cell line infected with the To336 strain of RV. Our results showed that RV lowered the levels of microtubule-associated protein 1 light chain 3 B-II (LC3B-II) and the autophagy-related gene 12-autophagy-related gene 5 conjugate, inhibited the autophagic flux, suppressed the intracellular redistribution of LC3B, decreased both the average number and the size of autophagosomes per cell and impeded the formation of acidic vesicular organelles. Induction of autophagy by using rapamycin decreased both the viral yields and the apoptotic rates of infected cultures. Besides its cytoprotective effects, autophagy furnishes an important antiviral mechanism, inhibition of which may reorchestrate intracellular environment so as to better serve the unique requirements of RV replication. Together, our observations suggest that RV utilizes a totally different strategy to cope with autophagy than that evolved by other positive-stranded RNA viruses, and there is considerable heterogeneity among the members of the Togaviridae family in terms of their effects on the cellular autophagic cascade.
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Hsu YC, Huang TY, Chen MJ. Therapeutic ROS targeting of GADD45γ in the induction of G2/M arrest in primary human colorectal cancer cell lines by cucurbitacin E. Cell Death Dis 2014; 5:e1198. [PMID: 24763055 PMCID: PMC4001305 DOI: 10.1038/cddis.2014.151] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2014] [Revised: 02/21/2014] [Accepted: 03/10/2014] [Indexed: 02/06/2023]
Abstract
Cucurbitacin E (CuE) or α-elaterin is a natural compound previously shown to be an antifeedant as well as a potent chemopreventive agent against several types of cancer. The present study investigated the anticancer effects of CuE on colorectal cancer (CRC) using primary cell lines isolated from five CRC patients in Taiwan, Specifically, we explored the anti-proliferation and cell cycle G2/M arrest induced by CuE in CRC cells. MPM-2 flow cytometry tests show that CuE-treated cells accumulated in metaphase (CuE 2.5-7.5 μM). Results further indicate that CuE produced G2/M arrest as well as the downregulation of CDC2 and cyclin B1 expression and dissociation. Both effects increased proportionally with the dose of CuE; however, the inhibition of proliferation, arrest of mitosis, production of reactive oxygen species (ROS), and loss of mitochondrial membrane potential (ΔΨm) were found to be dependent on the quantity of CuE used to treat the cancer cells. In addition, cell cycle arrest in treated cells coincided with the activation of the gene GADD45(α, β, γ). Incubation with CuE resulted in the binding of GADD45γ to CDC2, which suggests that the delay in CuE-induced mitosis is regulated by the overexpression of GADD45γ. Our findings suggest that, in addition to the known effects on cancer prevention, CuE may have antitumor activities in established CRC.
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Affiliation(s)
- Y-C Hsu
- Graduate Institute of Medical Science, College of Health Sciences, Chang Jung Christian University, Tainan, Taiwan
- Innovative Research Center of Medicine, College of Health Sciences, Chang Jung Christian University, Tainan, Taiwan
| | - T-Y Huang
- Department of Neurosurgery, Tainan Sin-Lau Hospital, Tainan, Taiwan
| | - M-J Chen
- Division of Traumatology, Department of Surgery, Chi Mei Medical Center, Tainan, Taiwan
- Department of Sports Management, College of Leisure and Recreation Management, Chia Nan University of Pharmacy and Science, Tainan, Taiwan
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Yang C, Gao R, Wang J, Yuan W, Wang C, Zhou X. High-mobility group nucleosome-binding domain 5 increases drug resistance in osteosarcoma through upregulating autophagy. Tumour Biol 2014; 35:6357-63. [PMID: 24664583 DOI: 10.1007/s13277-014-1833-0] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2014] [Accepted: 03/06/2014] [Indexed: 01/25/2023] Open
Abstract
Although tumor therapy has been improved in the past decades, the survival outcomes for osteosarcoma remain unsatisfactory, and one of the primary reasons for the failure of current treatment is that patients with late-stage cancer often develop resistance to anticancer drugs. High-mobility group nucleosome-binding domain 5 (HMGN5) is a newly identified gene associated with cancer and autophagy, which could inhibit apoptosis induced by anticancer agents. However, it is still unclear whether HMGN5 regulated autophagy in osteosarcoma, and the mechanism and significance of HMGN5-mediated autophagy in tumor therapy is never investigated. In this study, we first detected HMGN5 in vivo and in vitro. HMGN5 was highly expressed in osteosarcoma tumor, especially in posttreatment tumor. Next, we employed adenovirus-mediated overexpression of HMGN5 in U-2OS and MG63 to investigate the role of HMGN5 in osteosarcoma cell lines. Adenovirus-mediated overexpression of HMGN5 could efficiently upregulate the expression level of HMGN5 in osteosarcoma cell lines at both messenger RNA (mRNA) and protein levels. Anticancer agents namely doxorubicin, cisplatin, and methotrexate each induced HMGN5 upregulation in human U-2OS and MG63 osteosarcoma cell lines. In addition, overexpression of HMGN5 reduced the chemosensitivity of osteosarcoma cells in vitro, and the mechanistic investigation revealed that HMGN5 increased drug resistance by upregulating autophagy. Therefore, HMGN5 is a critical factor in the development of chemoresistance through regulating autophagy, and it offers a novel target for improving osteosarcoma therapy.
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Affiliation(s)
- Chaoqun Yang
- Department of Orthopedic Surgery, Changzheng Hospital, Second Military Medical University, 415 Fengyang Road, Shanghai, 200003, People's Republic of China,
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Abstract
The immune system and bone are intimately linked with significant physical and functionally related interactions. The innate immune system functions as an immediate response system to initiate protections against local challenges such as pathogens and cellular damage. Bone is a very specific microenvironment, in which infectious attack is less common but repair and regeneration are ongoing and important functions. Thus, in the bone the primary goal of innate immune and bone interactions is to maintain tissue integrity. Innate immune signals are critical for removal of damaged and apoptotic cells and to stimulate normal tissue repair and regeneration. In this review we focus on the innate immune mechanisms that function to regulate bone homeostasis.
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Affiliation(s)
- Julia F. Charles
- Department of Medicine, Division of Rheumatology, Allergy and Immunology, Brigham and Women’s Hospital, 75 Francis Street, Boston, MA, 02115 Phone: FAX:
| | - Mary C. Nakamura
- Department of Medicine, Division of Rheumatology, University of California, San Francisco, 513 Parnassus Avenue, San Francisco, CA, 94143
- Arthritis/Immunology Section, Veterans Affairs Medical Center, 4150 Clement Street, 111R, San Francisco, CA 94121, Phone: 415 750-2104, FAX: 415 750-6920,
- corresponding author: Arthritis/Immunology Section, Veterans Affairs Medical Center, 4150 Clement Street, 111R, San Francisco, CA 94121
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