1
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Muzza M, Pogliaghi G, Colombo C, Grassi ES, Carbone E, Palazzo S, Frattini F, Gazzano G, Persani L, Fugazzola L. Extra-nuclear TERT counteracts oxidative stress and promotes progression in papillary thyroid carcinoma. Transl Res 2024; 271:1-12. [PMID: 38670453 DOI: 10.1016/j.trsl.2024.04.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Revised: 04/16/2024] [Accepted: 04/16/2024] [Indexed: 04/28/2024]
Abstract
The reactivation of TERT is associated with poor outcome in papillary thyroid cancer (PTC). Extra-telomeric functions of TERT were reported, with a protective role against oxidative stress (OS). The aim of the present study was to explore the extra-nuclear TERT localization in PTC and its role in cancer progression. TERT nuclear export under OS were analyzed in K1 PTC cell line. We investigated the role of different TERT localizations using specific TERT constructs that limit its localization to the nucleus or to the mitochondria. The effect of SRC kinase inhibitor PP2, which reduces TERT nuclear export, was investigated as well. Moreover, TERT localization was analyzed in 39 PTC tissues and correlated with the genetic profile and the level of OS, DNA damage and apoptosis in the tumors and with the clinical characteristics of the patients. We demonstrated that TERT is exported from the nucleus in response to OS induced either from H2O2 or the BRAF inhibitor PLX4720. We proved that extra-nuclear TERT reduces mitochondrial OS and induces mitochondrial fragmentation. Moreover, limiting mitochondrial TERT localization reduced proliferation, migration, AKT phosphorylation and glycolysis and increased DNA damage and p21 expression. Finally, in PTC tissues the fraction of mitochondrial/nuclear TERT resulted inversely correlated with OS and p21 expression and associated with tumor persistence. In conclusion, our data indicate that extra-nuclear TERT is involved in reducing the effect of excessive OS, thus promoting cancer cell survival. Extra-nuclear TERT may thus represent a marker of cancer progression and a possible therapeutic target in PTC.
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Affiliation(s)
- Marina Muzza
- Department of Endocrine and Metabolic Diseases, Endocrine Oncology Unit, IRCCS Istituto Auxologico Italiano, Milan, Italy.
| | - Gabriele Pogliaghi
- Department of Endocrine and Metabolic Diseases, Endocrine Oncology Unit, IRCCS Istituto Auxologico Italiano, Milan, Italy
| | - Carla Colombo
- Department of Endocrine and Metabolic Diseases, Endocrine Oncology Unit, IRCCS Istituto Auxologico Italiano, Milan, Italy; Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
| | - Elisa Stellaria Grassi
- Department of Medical Biotechnology and Translational Medicine, University of Milan, Milan, Italy
| | - Erika Carbone
- Department of Endocrine and Metabolic Diseases, Endocrine Oncology Unit, IRCCS Istituto Auxologico Italiano, Milan, Italy
| | - Sonia Palazzo
- Pathology Unit, IRCCS Istituto Auxologico Italiano, Milan, Italy
| | | | - Giacomo Gazzano
- Pathology Unit, IRCCS Istituto Auxologico Italiano, Milan, Italy
| | - Luca Persani
- Department of Endocrine and Metabolic Diseases, Endocrine Oncology Unit, IRCCS Istituto Auxologico Italiano, Milan, Italy; Department of Medical Biotechnology and Translational Medicine, University of Milan, Milan, Italy
| | - Laura Fugazzola
- Department of Endocrine and Metabolic Diseases, Endocrine Oncology Unit, IRCCS Istituto Auxologico Italiano, Milan, Italy; Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
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2
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Cengiz M, Sezer CV, Gür B, Bayrakdar A, İzgördü H, Alanyalı F, Öziç C, Kutlu HM. The role of ceranib-2 and its nanoform on the decrease of telomerase levels in human non-small cell cancer. Mol Biol Rep 2024; 51:889. [PMID: 39105852 DOI: 10.1007/s11033-024-09838-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2024] [Accepted: 07/31/2024] [Indexed: 08/07/2024]
Abstract
BACKGROUND Ceranib-2, an acid ceramidase (AC) inhibitor, can inhibit cancer cell proliferation and tumor development. However, poor water solubility and low cellular bioavailability limit its efficacy in cancer treatment. METHODS AND RESULTS This study aimed to investigate the cell death induced by ceranib-2 and its solid lipid nanoformulation (ceranib-2-SLN) produced by the hot homogenization technique and the synergistic relationship between ceramide and telomerase in vitro and in silico. Furthermore, this study proved the possible mechanism of ceranib-2-induced AC inhibition by in silico studies. The effective cytotoxic concentrations of ceranib-2, telomerase level, and changes in ceramide levels were measured by MTT colorimetric cytotoxicity assay, ELISA, and LC/MS/MS methods, respectively. TEM results showed that ceranib-2-SLN was 13-fold smaller than the size of ceranib-2. Ceranib-2 and ceranib-2-SLN had IC50 concentrations of 31.62 (± 2.1) and 27.69 (± 1.75) µM in A549, and 48.79 (± 1.56) and 67.98 (± 2.33) in Beas-2B cells. These compounds simultaneously increased ceramide levels and decreased telomerase levels in A549 cells. Ceranib-2 increased telomerase levels while decreasing ceramide levels in Beas-2B cells. It was shown how the synergistic impact of ceranib-2-induced ceramide production and ceramide-induced telomerase level reduction on cytotoxicity in A549 cells. CONCLUSIONS Ceranib-2-SLN was discovered to be more cytotoxic on cancer cells than ceranib-2, suggesting that it could be a promising option for the development of a new anti-cancer agent.
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Affiliation(s)
- Mustafa Cengiz
- Department of Elementary Education, Faculty of Education, Siirt University, Siirt, 56100, Türkiye.
| | - Canan Vejselova Sezer
- Department of Biology, Faculty of Science, Eskişehir Technical University, Eskişehir, 26470, Türkiye
| | - Bahri Gür
- Department of Biochemistry, Faculty of Sciences and Arts, Iğdır University, Iğdır, 76300, Türkiye.
| | - Alpaslan Bayrakdar
- Vocational School of Higher Education for Healthcare Services, Iğdır University, Iğdır, 76000, Türkiye
| | - Hüseyin İzgördü
- Department of Biology, Faculty of Science, Eskişehir Technical University, Eskişehir, 26470, Türkiye
| | - Filiz Alanyalı
- Department of Biology, Faculty of Science, Eskişehir Technical University, Eskişehir, 26470, Türkiye
| | - Cem Öziç
- Department of Medical Biology, Kafkas University, Medicine Faculty, Ahmet Arslan Street, Kars, 36100, Türkiye
| | - Hatice Mehtap Kutlu
- Department of Biology, Faculty of Science, Eskişehir Technical University, Eskişehir, 26470, Türkiye
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3
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Palamarchuk AI, Kovalenko EI, Streltsova MA. Multiple Actions of Telomerase Reverse Transcriptase in Cell Death Regulation. Biomedicines 2023; 11:biomedicines11041091. [PMID: 37189709 DOI: 10.3390/biomedicines11041091] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 03/25/2023] [Accepted: 04/02/2023] [Indexed: 04/07/2023] Open
Abstract
Telomerase reverse transcriptase (TERT), a core part of telomerase, has been known for a long time only for its telomere lengthening function by reverse transcription of RNA template. Currently, TERT is considered as an intriguing link between multiple signaling pathways. The diverse intracellular localization of TERT corresponds to a wide range of functional activities. In addition to the canonical function of protecting chromosome ends, TERT by itself or as a part of the telomerase complex participates in cell stress responses, gene regulation and mitochondria functioning. Upregulation of TERT expression and increased telomerase activity in cancer and somatic cells relate to improved survival and persistence of such cells. In this review, we summarize the data for a comprehensive understanding of the role of TERT in cell death regulation, with a focus on the interaction of TERT with signaling pathways involved in cell survival and stress response.
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Affiliation(s)
- Anastasia I. Palamarchuk
- Shemyakin & Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Ul. Miklukho-Maklaya 16/10, 117997 Moscow, Russia
| | - Elena I. Kovalenko
- Shemyakin & Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Ul. Miklukho-Maklaya 16/10, 117997 Moscow, Russia
| | - Maria A. Streltsova
- Shemyakin & Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Ul. Miklukho-Maklaya 16/10, 117997 Moscow, Russia
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4
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Uno Y, Tanaka H, Miyakawa K, Akiyama N, Kamikokura Y, Yuzawa S, Kitada M, Takei H, Tanino M. Subcellular localization of hTERT in breast cancer: insights into its tumorigenesis and drug resistance mechanisms in HER2-immunopositive breast cancer. Hum Pathol 2022; 134:74-84. [PMID: 36549600 DOI: 10.1016/j.humpath.2022.12.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 12/14/2022] [Accepted: 12/15/2022] [Indexed: 12/24/2022]
Abstract
Human telomerase reverse transcriptase (hTERT) is highly expressed in various cancers, including breast cancer. Although telomere elongation is an essential role for hTERT, the nuclear export after oxdative stress has also been shown in several cancer cell lines and is associated with drug-resistance in vitro. As only a few reports focused on the subcellular localization of hTERT in clinical specimens, we performed immunohistochemistry (IHC) and analyzed the correlation between intracellular hTERT expression and the clinicopathological characteristics to identify the clinical significance of hTERT subcellular expression in breast cancers. 144 invasive breast cancers classified by IHC subtype without primary systemic therapy (PST), were selected from a surgical resection cohort and were immunostained for hTERT, p-STAT3, p-AKT and p-ERK. The nuclear and/or cytoplasmic staining intensity and proportion of hTERT were scored and compared with clinicopathological parameters. The nuclear hTERT expression was significantly correlated with HER2 expression (p = 0.00156), and the scores were significantly correlated with p-STAT3 and p-AKT expression scores (r = 0.532, p = 0.000587 and r = 0.345, p = 0.0339, respectively) in the HER2-immunopositive breast cancer including luminal-HER2 and HER2 subtypes. Furthermore, hTERT was expressed more in cytoplasm in the specimens after PST than those before PST, and the score tended to be negatively correlated with tumor shrinkage rate in HER2 subtype (r = -0.593, p = 0.0705). These results suggest that nuclear and/or cytoplasmic hTERT may play a different role before and after PST including the tumorigenesis and drug-resistance in breast cancer. Suppression of cytoplasmic hTERT expression may lead to more effective strategy for drug-resistant HER2 subtype in breast cancer.
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Affiliation(s)
- Yuji Uno
- Department of Diagnostic Pathology, Asahikawa Medical University Hospital, Midorigaoka-Higashi 2-1-1-1, Asahikawa, Hokkaido, 0788510, Japan
| | - Hiroki Tanaka
- Division of Tumor Pathology, Department of Pathology, Asahikawa Medical University, Midorigaoka-Higashi 2-1-1-1, Asahikawa, Hokkaido, 0788510, Japan
| | - Keita Miyakawa
- Department of Diagnostic Pathology, Asahikawa Medical University Hospital, Midorigaoka-Higashi 2-1-1-1, Asahikawa, Hokkaido, 0788510, Japan
| | - Naoko Akiyama
- Department of Diagnostic Pathology, Asahikawa Medical University Hospital, Midorigaoka-Higashi 2-1-1-1, Asahikawa, Hokkaido, 0788510, Japan
| | - Yuki Kamikokura
- Department of Diagnostic Pathology, Asahikawa Medical University Hospital, Midorigaoka-Higashi 2-1-1-1, Asahikawa, Hokkaido, 0788510, Japan
| | - Sayaka Yuzawa
- Department of Diagnostic Pathology, Asahikawa Medical University Hospital, Midorigaoka-Higashi 2-1-1-1, Asahikawa, Hokkaido, 0788510, Japan
| | - Masahiro Kitada
- Breast Center, Asahikawa Medical University Hospital, Midorigaoka-Higashi 2-1-1-1, Asahikawa, Hokkaido, 0788510, Japan
| | - Hidehiro Takei
- Ochsner LSU Health Shreveport-Academic Medical Center, 1541 Kings Highway Shreveport, LA, 71103, USA
| | - Mishie Tanino
- Department of Diagnostic Pathology, Asahikawa Medical University Hospital, Midorigaoka-Higashi 2-1-1-1, Asahikawa, Hokkaido, 0788510, Japan.
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5
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Judasz E, Lisiak N, Kopczyński P, Taube M, Rubiś B. The Role of Telomerase in Breast Cancer's Response to Therapy. Int J Mol Sci 2022; 23:12844. [PMID: 36361634 PMCID: PMC9654063 DOI: 10.3390/ijms232112844] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Revised: 10/13/2022] [Accepted: 10/24/2022] [Indexed: 11/26/2023] Open
Abstract
Currently, breast cancer appears to be the most widespread cancer in the world and the most common cause of cancer deaths. This specific type of cancer affects women in both developed and developing countries. Prevention and early diagnosis are very important factors for good prognosis. A characteristic feature of cancer cells is the ability of unlimited cell division, which makes them immortal. Telomeres, which are shortened with each cell division in normal cells, are rebuilt in cancer cells by the enzyme telomerase, which is expressed in more than 85% of cancers (up to 100% of adenocarcinomas, including breast cancer). Telomerase may have different functions that are related to telomeres or unrelated. It has been shown that high activity of the enzyme in cancer cells is associated with poor cell sensitivity to therapies. Therefore, telomerase has become a potential target for cancer therapies. The low efficacy of therapies has resulted in the search for new combined and more effective therapeutic methods, including the involvement of telomerase inhibitors and telomerase-targeted immunotherapy.
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Affiliation(s)
- Eliza Judasz
- Department of Clinical Chemistry and Molecular Diagnostics, Poznan University of Medical Sciences, 60-806 Poznan, Poland
| | - Natalia Lisiak
- Department of Clinical Chemistry and Molecular Diagnostics, Poznan University of Medical Sciences, 60-806 Poznan, Poland
| | - Przemysław Kopczyński
- Centre for Orthodontic Mini-Implants at the Department and Clinic of Maxillofacial Orthopedics and Orthodontics, Poznan University of Medical Sciences, 60-812 Poznan, Poland
| | - Magdalena Taube
- Department of Clinical Chemistry and Molecular Diagnostics, Poznan University of Medical Sciences, 60-806 Poznan, Poland
| | - Błażej Rubiś
- Department of Clinical Chemistry and Molecular Diagnostics, Poznan University of Medical Sciences, 60-806 Poznan, Poland
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6
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Chatterjee D, Chakrabarti O. Role of stress granules in modulating senescence and promoting cancer progression: Special emphasis on glioma. Int J Cancer 2021; 150:551-561. [PMID: 34460104 DOI: 10.1002/ijc.33787] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Revised: 07/22/2021] [Accepted: 08/24/2021] [Indexed: 12/12/2022]
Abstract
Stress granules (SGs) contain mRNAs and proteins stalled in translation during stress; these are increasingly being implicated in diseases, including neurological disorders and cancer. The dysregulated assembly, persistence, disassembly and clearance of SGs contribute to the process of senescence. Senescence has long been a mysterious player in cellular physiology and associated diseases. The systemic process of aging has been pivotal in the development of various neurological disorders like age-related neuropathy, Alzheimer's disease and Parkinson's disease. Glioma is a cancer of neurological origin with a very poor prognosis and high rate of recurrence, SGs have only recently been implicated in its pathogenesis. Senescence has long been established to play an antitumorigenic role, however, relatively less studied is its protumorigenic importance. Here, we have evaluated the existing literature to assess the crosstalk of the two biological phenomena of senescence and SG formation in the context of tumorigenesis. In this review, we have attempted to analyze the contribution of senescence in regulating diverse cellular processes, like, senescence associated secretory phenotype (SASP), microtubular reorganization, telomeric alteration, autophagic clearance and how intricately these phenomena are tied with the formation of SGs. Finally, we propose that interplay between senescence, its contributing factors and the genesis of SGs can drive tumorigenicity of gliomas, which can potentially be utilized for therapeutic intervention.
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Affiliation(s)
- Debmita Chatterjee
- Biophysics & Structural Genomics Division, Saha Institute of Nuclear Physics, Kolkata, India
| | - Oishee Chakrabarti
- Biophysics & Structural Genomics Division, Saha Institute of Nuclear Physics, Kolkata, India.,Homi Bhabha National Institute, Mumbai, Maharashtra, India
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7
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Romaniuk-Drapała A, Totoń E, Konieczna N, Machnik M, Barczak W, Kowal D, Kopczyński P, Kaczmarek M, Rubiś B. hTERT Downregulation Attenuates Resistance to DOX, Impairs FAK-Mediated Adhesion, and Leads to Autophagy Induction in Breast Cancer Cells. Cells 2021; 10:cells10040867. [PMID: 33920284 PMCID: PMC8068966 DOI: 10.3390/cells10040867] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Revised: 04/06/2021] [Accepted: 04/07/2021] [Indexed: 12/13/2022] Open
Abstract
Telomerase is known to contribute to telomere maintenance and to provide cancer cell immortality. However, numerous reports are showing that the function of the enzyme goes far beyond chromosome ends. The study aimed to explore how telomerase downregulation in MCF7 and MDA-MB-231 breast cancer cells affects their ability to survive. Consequently, sensitivity to drug resistance, proliferation, and adhesion were assessed. The lentiviral-mediated human telomerase reverse transcriptase (hTERT) downregulation efficiency was performed at gene expression and protein level using qPCR and Western blot, respectively. Telomerase activity was evaluated using the Telomeric Repeat Amplification Protocol (TRAP) assay. The study revealed that hTERT downregulation led to an increased sensitivity of breast cancer cells to doxorubicin which was demonstrated in MTT and clonogenic assays. During a long-term doubling time assessment, a decreased population doubling level was observed. Interestingly, it did not dramatically affect cell cycle distribution. hTERT downregulation was accompanied by an alteration in β1-integrin- and by focal adhesion kinase (FAK)-driven pathways together with the reduction of target proteins phosphorylation, i.e., paxillin and c-Src. Additionally, autophagy activation was observed in MDA-MB-231 cells manifested by alternations in Atg5, Beclin 1, LC3II/I ratio, and p62. These results provide new evidence supporting the possible therapeutic potential of telomerase downregulation leading to induction of autophagy and cancer cells elimination.
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Affiliation(s)
- Aleksandra Romaniuk-Drapała
- Department of Clinical Chemistry and Molecular Diagnostics, Poznan University of Medical Sciences, 49 Przybyszewskiego St., 60-355 Poznań, Poland; (A.R.-D.); (E.T.); (N.K.); (D.K.)
| | - Ewa Totoń
- Department of Clinical Chemistry and Molecular Diagnostics, Poznan University of Medical Sciences, 49 Przybyszewskiego St., 60-355 Poznań, Poland; (A.R.-D.); (E.T.); (N.K.); (D.K.)
| | - Natalia Konieczna
- Department of Clinical Chemistry and Molecular Diagnostics, Poznan University of Medical Sciences, 49 Przybyszewskiego St., 60-355 Poznań, Poland; (A.R.-D.); (E.T.); (N.K.); (D.K.)
| | - Marta Machnik
- Department of Cancer Immunology, Poznan University of Medical Sciences, 60-806 Poznan, Poland;
| | - Wojciech Barczak
- Department of Head and Neck Surgery, Poznan University of Medical Sciences, The Greater Poland Cancer Centre, 61-866 Poznan, Poland;
| | - Dagmar Kowal
- Department of Clinical Chemistry and Molecular Diagnostics, Poznan University of Medical Sciences, 49 Przybyszewskiego St., 60-355 Poznań, Poland; (A.R.-D.); (E.T.); (N.K.); (D.K.)
| | - Przemysław Kopczyński
- Centre for Orthodontic Mini-Implants at the Department and Clinic of Maxillofacial Orthopedics and Orthodontics, Poznan University of Medical Sciences, 60-812 Poznan, Poland;
| | - Mariusz Kaczmarek
- Department of Immunology, Chair of Clinical Immunology, Poznań University of Medical Sciences, 5D Rokietnicka St., 60-806 Poznań, Poland;
| | - Błażej Rubiś
- Department of Clinical Chemistry and Molecular Diagnostics, Poznan University of Medical Sciences, 49 Przybyszewskiego St., 60-355 Poznań, Poland; (A.R.-D.); (E.T.); (N.K.); (D.K.)
- Correspondence: ; Tel.: +48-61-869-14-27
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8
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Qin H, Yan Z, Du Z, Ren J, Qu X. Developing Enzyme‐Responsive Nanomedicine for Inhibition of hTERT Mitochondrial Translocation. ADVANCED THERAPEUTICS 2020. [DOI: 10.1002/adtp.201900203] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Hongshuang Qin
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource UtilizationChangchun Institute of Applied ChemistryChinese Academy of Sciences Changchun Jilin 130022 China
| | - Zhengqing Yan
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource UtilizationChangchun Institute of Applied ChemistryChinese Academy of Sciences Changchun Jilin 130022 China
- University of Chinese Academy of Sciences Beijing 100039 China
| | - Zhi Du
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource UtilizationChangchun Institute of Applied ChemistryChinese Academy of Sciences Changchun Jilin 130022 China
- University of Chinese Academy of Sciences Beijing 100039 China
| | - Jinsong Ren
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource UtilizationChangchun Institute of Applied ChemistryChinese Academy of Sciences Changchun Jilin 130022 China
| | - Xiaogang Qu
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource UtilizationChangchun Institute of Applied ChemistryChinese Academy of Sciences Changchun Jilin 130022 China
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Sheng J, Shen L, Sun L, Zhang X, Cui R, Wang L. Inhibition of PI3K/mTOR increased the sensitivity of hepatocellular carcinoma cells to cisplatin via interference with mitochondrial-lysosomal crosstalk. Cell Prolif 2019; 52:e12609. [PMID: 31033054 PMCID: PMC6536453 DOI: 10.1111/cpr.12609] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2018] [Revised: 01/31/2019] [Accepted: 02/13/2019] [Indexed: 12/18/2022] Open
Abstract
OBJECTIVES The genotoxicity of cisplatin towards nuclear DNA is not sufficient to explain the cisplatin resistance of hepatocellular carcinoma (HCC) cells; cisplatin interacts with many organelles, which can influence the sensitivity. Here, we explored the role of mitochondrial-lysosomal crosstalk in the cisplatin resistance of HCC cells. MATERIALS AND METHODS Huh7 and HepG2 cells were subjected to different treatments. Flow cytometry was conducted to detect mitochondrial reactive oxygen species, mitochondrial mass, lysosomal function, mitochondrial membrane potential and apoptosis. Western blotting was performed to evaluate protein levels. The oxygen consumption rate was measured to evaluate mitochondrial function. RESULTS Cisplatin activated mitophagy and lysosomal biogenesis, resulting in crosstalk between mitochondria and lysosomes and cisplatin resistance in HCC cells. Furthermore, a combination of cisplatin with the phosphatidylinositol-3-kinase/mammalian target of rapamycin (PI3K/mTOR) inhibitor PKI-402 induced lysosomal membrane permeabilization. This effect changed the role of the lysosome from a protective one to that of a cell death promoter, completely destroying the mitochondrial-lysosomal crosstalk and significantly enhancing the sensitivity of HCC cells to cisplatin. CONCLUSIONS This is the first evidence of the importance of mitochondrial-lysosomal crosstalk in the cisplatin resistance of HCC cells and of the destruction of this crosstalk by a PI3K/mTOR inhibitor to increase the sensitivity of HCC cells to cisplatin. This mechanism could be developed as a novel target for treatment of HCC in the future.
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Affiliation(s)
- Jiyao Sheng
- Department of Hepatobiliary and Pancreatic SurgeryThe Second Hospital of Jilin UniversityChangchunJilinChina
| | - Luyan Shen
- Department of Pathophysiology, College of Basic Medical SciencesJilin UniversityChangchunJilinChina
| | - Liankun Sun
- Department of Pathophysiology, College of Basic Medical SciencesJilin UniversityChangchunJilinChina
| | - Xuewen Zhang
- Department of Hepatobiliary and Pancreatic SurgeryThe Second Hospital of Jilin UniversityChangchunJilinChina
| | - Ranji Cui
- Jilin Provincial Key Laboratory on Molecular and Chemical GeneticThe Second Hospital of Jilin UniversityChangchunJilinChina
| | - Lizhong Wang
- Jilin Provincial Key Laboratory on Molecular and Chemical GeneticThe Second Hospital of Jilin UniversityChangchunJilinChina
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10
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Kuşoğlu A, Biray Avcı Ç. Cancer stem cells: A brief review of the current status. Gene 2018; 681:80-85. [PMID: 30268439 DOI: 10.1016/j.gene.2018.09.052] [Citation(s) in RCA: 133] [Impact Index Per Article: 22.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2018] [Accepted: 09/26/2018] [Indexed: 12/18/2022]
Abstract
Cancer stem cells (CSCs) comprise the subpopulation of tumor bulk and acquire resistant to conventional therapies and are considered as the primary tumor initiator cells. Nowadays, the tumor heterogeneity originated from CSCs, and its progenitors are accepted as a mortifying drawback in front of the cancer therapies. However, escalating knowledge gained from studies investigating the biology of CSCs will open up new frames for targeted therapies and decrease the chance of recurrence of the disease. In this review, the general understanding of CSCs and current studies were discussed briefly. Considering the latest data collected from studies of CSCs, defining the tumor heterogeneity and tumor microenvironment comprehensively will be very important to step up the cancer research.
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Affiliation(s)
- Alican Kuşoğlu
- Ege University Medical School, Department of Medical Biology, Turkey.
| | - Çığır Biray Avcı
- Ege University Medical School, Department of Medical Biology, Turkey
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11
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Ni Z, He J, Wu Y, Hu C, Dai X, Yan X, Li B, Li X, Xiong H, Li Y, Li S, Xu L, Li Y, Lian J, He F. AKT-mediated phosphorylation of ATG4B impairs mitochondrial activity and enhances the Warburg effect in hepatocellular carcinoma cells. Autophagy 2018; 14:685-701. [PMID: 29165041 DOI: 10.1080/15548627.2017.1407887] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Phosphorylation is a major type of post-translational modification, which can influence the cellular physiological function. ATG4B, a key macroautophagy/autophagy-related protein, has a potential effect on the survival of tumor cells. However, the role of ATG4B phosphorylation in cancers is still unknown. In this study, we identified a novel phosphorylation site at Ser34 of ATG4B induced by AKT in HCC cells. The phosphorylation of ATG4B at Ser34 had little effect on autophagic flux, but promoted the Warburg effect including the increase of L-lactate production and glucose consumption, and the decrease of oxygen consumption in HCC cells. The Ser34 phosphorylation of ATG4B also contributed to the impairment of mitochondrial activity including the inhibition of F1Fo-ATP synthase activity and the elevation of mitochondrial ROS in HCC cells. Moreover, the phosphorylation of ATG4B at Ser34 enhanced its mitochondrial location and the subsequent colocalization with F1Fo-ATP synthase in HCC cells. Furthermore, recombinant human ATG4B protein suppressed the activity of F1Fo-ATP synthase in MgATP submitochondrial particles from patient-derived HCC tissues in vitro. In brief, our results demonstrate for the first time that the phosphorylation of ATG4B at Ser34 participates in the metabolic reprogramming of HCC cells via repressing mitochondrial function, which possibly results from the Ser34 phosphorylation-induced mitochondrial enrichment of ATG4B and the subsequent inhibition of F1Fo-ATP synthase activity. Our findings reveal a noncanonical working pattern of ATG4B under pathological conditions, which may provide a scientific basis for developing novel strategies for HCC treatment by targeting ATG4B and its Ser34 phosphorylation.
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Affiliation(s)
- Zhenhong Ni
- a Department of Biochemistry and Molecular Biology , College of Basic Medical Sciences, Third Military Medical University , Chongqing, China
| | - Jintao He
- b Battalion 17 of Students , College of Preventive Medicine, Third Military Medical University , Chongqing, China
| | - Yaran Wu
- a Department of Biochemistry and Molecular Biology , College of Basic Medical Sciences, Third Military Medical University , Chongqing, China
| | - Changjiang Hu
- c Department of Gastroenterology , Xinqiao Hospital, Third Military Medical University , Chongqing , China
| | - Xufang Dai
- d College of Educational Science, Chongqing Normal University , Chongqing , China
| | - Xiaojing Yan
- a Department of Biochemistry and Molecular Biology , College of Basic Medical Sciences, Third Military Medical University , Chongqing, China
| | - Bo Li
- a Department of Biochemistry and Molecular Biology , College of Basic Medical Sciences, Third Military Medical University , Chongqing, China
| | - Xinzhe Li
- a Department of Biochemistry and Molecular Biology , College of Basic Medical Sciences, Third Military Medical University , Chongqing, China
| | - Haojun Xiong
- a Department of Biochemistry and Molecular Biology , College of Basic Medical Sciences, Third Military Medical University , Chongqing, China
| | - Yuming Li
- e Department of Hepatobiliary Surgery , Xinqiao Hospital, Third Military Medical University , Chongqing , China
| | - Song Li
- f Center for Pharmacogenetics , Department of Pharmaceutical Sciences, School of Pharmacy , University of Pittsburgh , Pittsburgh , PA , USA
| | - Liang Xu
- g Department of Molecular Biosciences and Department of Radiation Oncology , University of Kansas Cancer Center, University of Kansas , Lawrence , KS , USA
| | - Yongsheng Li
- h Institute of Cancer, Xinqiao Hospital, Third Military Medical University , Chongqing , China
| | - Jiqin Lian
- a Department of Biochemistry and Molecular Biology , College of Basic Medical Sciences, Third Military Medical University , Chongqing, China
| | - Fengtian He
- a Department of Biochemistry and Molecular Biology , College of Basic Medical Sciences, Third Military Medical University , Chongqing, China
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12
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Wang D, Zhang S, Zhang T, Wan G, Chen B, Xiong Q, Zhang J, Zhang W, Wang Y. Pullulan-coated phospholipid and Pluronic F68 complex nanoparticles for carrying IR780 and paclitaxel to treat hepatocellular carcinoma by combining photothermal therapy/photodynamic therapy and chemotherapy. Int J Nanomedicine 2017; 12:8649-8670. [PMID: 29255359 PMCID: PMC5722019 DOI: 10.2147/ijn.s147591] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
IR780, a near-infrared dye, can also be used as a photosensitizer both for photothermal therapy (PTT) and photodynamic therapy (PDT). In this study, we designed a simple but effective nanoparticle system for carrying IR780 and paclitaxel, thus hoping to combine PTT/PDT and chemotherapy to treat hepatocellular carcinoma (HCC). This nanosystem, named PDF nanoparticles, consisted of phospholipid/Pluronic F68 complex nanocores and pullulan shells. IR780 and paclitaxel were loaded separately into PDF nanoparticles to form PDFI and PDFP nanoparticles, which had regular sphere shapes and relatively small sizes. Upon near-infrared laser irradiation at 808 nm, PDFI nanoparticles showed strong PTT/PDT efficacy both in vitro and in vivo. In MHCC-97H cells, the combined treatment of PDFI nanoparticles/laser irradiation and PDFP nanoparticles exhibited significant synergistic effects on inhibiting cell proliferation and inducing cell apoptosis and cell cycle arrest at G2/M phase. In MHCC-97H tumor-bearing mice, PDFI nanoparticles exhibited excellent HCC-targeting and accumulating capability after intravenous injection. Furthermore, the combined treatment of PDFI nanoparticles/laser irradiation and PDFP nanoparticles also effectively inhibited the tumor growth and the tumor angiogenesis in MHCC-97H tumor-bearing mice. In summary, we put forward a therapeutic strategy for HCC treatment by combining PTT/PDT and chemotherapy.
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Affiliation(s)
- Dan Wang
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics (Theranostics), School of Pharmacy, Tianjin Medical University
| | - Sipei Zhang
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics (Theranostics), School of Pharmacy, Tianjin Medical University
| | - Tao Zhang
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics (Theranostics), School of Pharmacy, Tianjin Medical University
| | - Guoyun Wan
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics (Theranostics), School of Pharmacy, Tianjin Medical University
| | - Bowei Chen
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics (Theranostics), School of Pharmacy, Tianjin Medical University
| | - Qingqing Xiong
- Key Laboratory of Cancer Prevention and Therapy, National Clinical Research Center for Cancer, Tianjin Medical University Cancer Institute and Hospital
| | | | - Wenxue Zhang
- Radiotherapy Department, Tianjin Medical University General Hospital, Tianjin, China
| | - Yinsong Wang
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics (Theranostics), School of Pharmacy, Tianjin Medical University
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13
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Jue C, Min Z, Zhisheng Z, Lin C, Yayun Q, Xuanyi W, Feng J, Haibo W, Youyang S, Tadashi H, Shintaro I, Shiyu G, Yanqing L. COE inhibits vasculogenic mimicry in hepatocellular carcinoma via suppressing Notch1 signaling. JOURNAL OF ETHNOPHARMACOLOGY 2017; 208:165-173. [PMID: 28694103 DOI: 10.1016/j.jep.2017.07.007] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Revised: 06/11/2017] [Accepted: 07/02/2017] [Indexed: 06/07/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Vasculogenic mimicry (VM) has been suggested to be present in various malignant tumors and associated with tumor nutrition supply and metastasis, leading to poor prognosis of patients. Notch1 has been demonstrated to contribute to VM formation in hepathocellular carcinoma (HCC). Celastrus orbiculatus extract (COE), a mixture of 11 terpenoids isolated from the Chinese Herb Celastrus orbiculatus Vine, has been suggested to be effective in cancer treatment. AIM OF THE STUDY In the current study, experiments were carried out to examine the effect of COE on VM formation and HCC tumor growth both in vitro and in vivo. MATERIALS AND METHODS CCK-8 assay and Nikon live-work station were used to observe the viability of malignant cells treated with COE. Cell invasion was examined using Transwell. Matrigel was used to establish a 3-D culture condition for VM formation. Changes of mRNA and protein expression were examined by RT-PCR and Western Blot respectively. Tumor growth in vivo was monitored using in vivo fluorescence imaging device. PAS-CD34 dual staining and electron microscopy were used to observe VM formation. Immunohistochemical staining (IHC) was used to examine Notch1 and Hes1 expression in tumor tissues. RESULTS Results showed that COE can inhibit HCC cells proliferation and invasion in a concentration-dependent manner. VM formation induced by TGF-β1 was blocked by COE. In mouse xenograft model, COE inhibited tumor growth and VM formation. Both in vitro and in vivo studies showed that COE can downregulate expression of Notch1 and Hes1. CONCLUSION The current results indicate that COE can inhibit VM formation and HCC tumor growth by downregulating Notch1 signaling. This study demonstrates that COE is superior to other anti-angiogenesis agents and can be considered as a promising candidate in HCC treatment.
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Affiliation(s)
- Chen Jue
- Institution of Integrated Traditional Chinese and Western Medicine, Medical College, Yangzhou University, Yangzhou, Jiangsu, China; Department of Oncology, the Second People's Hospital of Taizhou Affiliated to Yangzhou University, Jiangsu, China; Department of Physiology, School of Medicine, Showa University, Tokyo, Japan.
| | - Zhao Min
- Institution of Integrated Traditional Chinese and Western Medicine, Medical College, Yangzhou University, Yangzhou, Jiangsu, China.
| | - Zhang Zhisheng
- Department of Oncology, the Second People's Hospital of Taizhou Affiliated to Yangzhou University, Jiangsu, China.
| | - Cui Lin
- Department of Oncology, the Second People's Hospital of Taizhou Affiliated to Yangzhou University, Jiangsu, China.
| | - Qian Yayun
- Institution of Integrated Traditional Chinese and Western Medicine, Medical College, Yangzhou University, Yangzhou, Jiangsu, China.
| | - Wang Xuanyi
- Institution of Integrated Traditional Chinese and Western Medicine, Medical College, Yangzhou University, Yangzhou, Jiangsu, China.
| | - Jin Feng
- Institution of Integrated Traditional Chinese and Western Medicine, Medical College, Yangzhou University, Yangzhou, Jiangsu, China.
| | - Wang Haibo
- Institution of Integrated Traditional Chinese and Western Medicine, Medical College, Yangzhou University, Yangzhou, Jiangsu, China.
| | - Shi Youyang
- Institution of Integrated Traditional Chinese and Western Medicine, Medical College, Yangzhou University, Yangzhou, Jiangsu, China.
| | - Hisamitsu Tadashi
- Department of Physiology, School of Medicine, Showa University, Tokyo, Japan.
| | - Ishikawa Shintaro
- Institution of Integrated Traditional Chinese and Western Medicine, Medical College, Yangzhou University, Yangzhou, Jiangsu, China; Department of Oncology, the Second People's Hospital of Taizhou Affiliated to Yangzhou University, Jiangsu, China; Department of Physiology, School of Medicine, Showa University, Tokyo, Japan.
| | - Guo Shiyu
- Department of Physiology, School of Medicine, Showa University, Tokyo, Japan.
| | - Liu Yanqing
- Institution of Integrated Traditional Chinese and Western Medicine, Medical College, Yangzhou University, Yangzhou, Jiangsu, China.
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14
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Abstract
It is well known that a decreased expression or inhibited activity of telomerase in cancer cells is accompanied by an increased sensitivity to some drugs (e.g., doxorubicin, cisplatin, or 5-fluorouracil). However, the mechanism of the resistance resulting from telomerase alteration remains elusive. There are theories claiming that it might be associated with telomere shortening, genome instability, hTERT translocation, mitochondria functioning modulation, or even alterations in ABC family gene expression. However, association of those mechanisms, i.e., drug resistance and telomerase alterations, is not fully understood yet. We review the current theories on the aspect of the role of telomerase in cancer cells resistance to therapy. We believe that revealing/unravelling this correlation might significantly contribute to an increased efficiency of cancer cells elimination, especially the most difficult ones, i.e., drug resistant.
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15
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Miao GY, Zhou X, Zhang X, Xie Y, Sun C, Liu Y, Gan L, Zhang H. Telomere-Mitochondrion Links Contribute to Induction of Senescence in MCF-7 Cells after Carbon-Ion Irradiation. Asian Pac J Cancer Prev 2017; 17:1993-8. [PMID: 27221886 DOI: 10.7314/apjcp.2016.17.4.1993] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
The effects of carbon-ion irradiation on cancer cell telomere function have not been comprehensively studied. In our previous report cancer cells with telomere dysfunction were more sensitive to carbon-ion irradiation, but the underlying mechanisms remained unclear. Here we found that telomerase activity was suppressed by carbon-ion irradiation via hTERT down-regulation. Inhibition of telomere activity by MST-312 further increased cancer cell radiosensitivity to carbon-ion radiation. hTERT suppression caused by either carbon-ion irradiation or MST-312 impaired mitochondrial function, as indicated by decreased membrane potential, mtDNA copy number, mitochondrial mass, total ATP levels and elevated reactive oxygen species (ROS). PGC-1α expression was repressed after carbion-ion irradiation, and hTERT inhibition by MST-312 could further exacerbate this effect. Lowering the mitochondrial ROS level by MitoTEMPO could partially counteract the induction of cellular senescence induced by carbon-ion radiation and MST-312 incubation. Taken together, the current data suggest that telomere-mitochondrion links play a role in the induction of senescence in MCF-7 cells after carbon-ion irradiation.
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Affiliation(s)
- Guo-Ying Miao
- Department of Heavy Ion Radiation Medicine, Institute of Modern Physics, Chinese Academy of Sciences, Gansu Province, China E-mail :
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16
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Han MH, Lee DS, Jeong JW, Hong SH, Choi IW, Cha HJ, Kim S, Kim HS, Park C, Kim GY, Moon SK, Kim WJ, Hyun Choi Y. Fucoidan Induces ROS-Dependent Apoptosis in 5637 Human Bladder Cancer Cells by Downregulating Telomerase Activity via Inactivation of the PI3K/Akt Signaling Pathway. Drug Dev Res 2016; 78:37-48. [PMID: 27654302 DOI: 10.1002/ddr.21367] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2016] [Accepted: 08/25/2016] [Indexed: 12/31/2022]
Abstract
Preclinical Research Fucoidan, a sulfated polysaccharide, is a compound found in various species of seaweed that has anti-viral, anti-bacterial, anti-oxidant, anti-inflammatory, and immunomodulatory activities; however, the underlying relationship between apoptosis and anti-telomerase activity has not been investigated. Here, we report that fucoidan-induced apoptosis in 5637 human bladder cancer cells was associated with an increase in the Bax/Bcl-2 ratio, the dissipation of the mitochondrial membrane potential (MMP, Δψm), and cytosolic release of cytochrome c from the mitochondria. Under the same experimental conditions, fucoidan-treatment decreased hTERT (human telomerase reverse transcriptase) expression and the transcription factors, c-myc and Sp1. This was accompanied by decreased telomerase activity. Fucoidan-treatment also suppressed activation of the PI3K/Akt signaling pathway. Inhibition of PI3K/Akt signaling enhanced fucoidan-induced apoptosis and anti-telomerase activity. Meanwhile, fucoidan treatment increased the generation of intracellular ROS, whereas the over-elimination of ROS by N-acetylcysteine, an anti-oxidant, attenuated fucoidan-induced apoptosis, inhibition of hTERT, c-myc, and Sp1 expression, and reversed fucoidan-induced inactivation of the PI3K/Akt signaling pathway. Collectively, these data indicate that the induction of apoptosis and the inhibition of telomerase activity by fucoidan are mediated via ROS-dependent inactivation of the PI3K/Akt pathway. Drug Dev Res 78 : 37-48, 2017. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Min Ho Han
- Natural Products Research Team, Marine Biodiversity Institute of Korea, Seocheon, 325-902, Republic of Korea
| | - Dae-Sung Lee
- Natural Products Research Team, Marine Biodiversity Institute of Korea, Seocheon, 325-902, Republic of Korea
| | - Jin-Woo Jeong
- Anti-Aging Research Center & Blue-Bio Industry RIC, Dongeui University, Busan, 614-714, Republic of Korea
| | - Su-Hyun Hong
- Department of Biochemistry, Dongeui University College of Korean Medicine, Busan, 614-052, Republic of Korea
| | - Il-Whan Choi
- Department of Microbiology, College of Medicine, Inje University, Busan, 608-756, Republic of Korea
| | - Hee-Jae Cha
- Departments of Parasitology and Genetics, College of Medicine, Kosin University, Busan, 602-702, Republic of Korea
| | - Suhkmann Kim
- Department of Chemistry, College of Natural Sciences, Pusan National University, Busan, 609-735, Republic of Korea
| | - Heui-Soo Kim
- Department of Biological Sciences, College of Natural Sciences, Pusan National University, Busan, 609-735, Republic of Korea
| | - Cheol Park
- Department of Molecular Biology, College of Natural Sciences and Human Ecology, Dongeui University, Busan, 614-714, Republic of Korea
| | - Gi-Young Kim
- Laboratory of Immunobiology, Department of Marine Life Sciences, Jeju National University, Jeju, 690-756, Republic of Korea
| | - Sung-Kwon Moon
- School of Food Science and Technology, Chung-Ang University, Ansung, 456-756, Republic of Korea
| | - Wun-Jae Kim
- Department of Urology, College of Medicine and Institute for Tumor Research, Chungbuk National University, Cheongju, 28644, Republic of Korea
| | - Yung Hyun Choi
- Natural Products Research Team, Marine Biodiversity Institute of Korea, Seocheon, 325-902, Republic of Korea.,Anti-Aging Research Center & Blue-Bio Industry RIC, Dongeui University, Busan, 614-714, Republic of Korea.,Department of Biochemistry, Dongeui University College of Korean Medicine, Busan, 614-052, Republic of Korea
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17
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Gu YJ, Li HD, Zhao L, Zhao S, He WB, Rui L, Su C, Zheng HC, Su RJ. GRP78 confers the resistance to 5-FU by activating the c-Src/LSF/TS axis in hepatocellular carcinoma. Oncotarget 2016; 6:33658-74. [PMID: 26378040 PMCID: PMC4741793 DOI: 10.18632/oncotarget.5603] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2015] [Accepted: 08/26/2015] [Indexed: 11/25/2022] Open
Abstract
5-FU is a common first-line chemotherapeutic drug for the treatment of hepatocellular carcinoma. However the development of acquired resistance to 5-FU confines its clinical usages. Although this phenomenon has been the subject of intense investigation, the exact mechanism of acquired resistance to 5-FU remains elusive. Here, we report that over-expression of GRP78 contributes to acquired resistance to 5-FU in HCC by up-regulating the c-Src/LSF/TS axis. Moreover, we found that the resistance to 5-FU conferred by GRP78 is mediated by its ATPase domain. The ATPase domain differentially increased the expression of LSF, TS and promoted the phosphorylation of ERK and Akt. We further identified that GRP78 interacts physically with c-Src through its ATPase domain and promotes the phosphorylation of c-Src, which in turn increases the expression of LSF in the nucleus. Together, GRP78 confers the resistance to 5-FU by up-regulating the c-Src/LSF/TS axis via its ATPase domain.
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Affiliation(s)
- Yan-jiao Gu
- Pathology Department, The First Affiliated Hospital of Liaoning Medical College, Jinzhou, China
| | - Hong-dan Li
- Central Laboratory, Liaoning Medical College, Jinzhou, China
| | - Liang Zhao
- Central Laboratory, Liaoning Medical College, Jinzhou, China
| | - Song Zhao
- Pharmacy Department, Liaoning Medical College, Jinzhou, China
| | - Wu-bin He
- Pathology Department, The First Affiliated Hospital of Liaoning Medical College, Jinzhou, China
| | - Li Rui
- Pathology Department, The First Affiliated Hospital of Liaoning Medical College, Jinzhou, China
| | - Chang Su
- Veterinary Medicine Department, Liaoning Medical College, Jinzhou, China
| | - Hua-chuan Zheng
- Cancer Research Center, Key Laboratory of Brain and Spinal Cord Injury of Liaoning Province and Laboratory Animal Center, The First Affiliated Hospital of Liaoning Medical College, Jinzhou, China
| | - Rong-jian Su
- Central Laboratory, Liaoning Medical College, Jinzhou, China
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18
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Wu W, Yang JL, Wang YL, Wang H, Yao M, Wang L, Gu JJ, Cai Y, Shi Y, Yao DF. Reversal of multidrug resistance of hepatocellular carcinoma cells by metformin through inhibiting NF-κB gene transcription. World J Hepatol 2016; 8:985-993. [PMID: 27621764 PMCID: PMC4990762 DOI: 10.4254/wjh.v8.i23.985] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Revised: 05/25/2016] [Accepted: 06/16/2016] [Indexed: 02/06/2023] Open
Abstract
AIM: To interfere with the activation of nuclear factor-κB (NF-κB) with metformin and explore its effect in reversing multidrug resistance (MDR) of hepatocellular carcinoma (HCC) cells.
METHODS: Expression of P-glycoprotein (P-gp) and NF-κB in human HepG2 or HepG2/adriamycin (ADM) cells treated with pCMV-NF-κB-small interference RNA (siRNA) with or without metformin, was analyzed by Western blot or fluorescence quantitative PCR. Cell viability was tested by CCK-8 assay. Cell cycle and apoptosis were measured by flow cytometry and Annexin-V-PE/7-AnnexinV apoptosis detection double staining assay, respectively.
RESULTS: P-gp overexpression in HepG2 and HepG2/ADM cells was closely related to mdr1 mRNA (3.310 ± 0.154) and NF-κB mRNA (2.580 ± 0.040) expression. NF-κB gene transcription was inhibited by specific siRNA with significant down-regulation of P-gp and enhanced HCC cell chemosensitivity to doxorubicin. After pretreatment with metformin, HepG2/ADM cells were sensitized to doxorubicin and P-gp was decreased through the NF-κB signaling pathway. The synergistic effect of metformin and NF-κB siRNA were found in HepG2/ADM cells with regard to proliferation inhibition, cell cycle arrest and inducing cell apoptosis.
CONCLUSION: Metformin via silencing NF-κB signaling could effectively reverse MDR of HCC cells by down-regulating MDR1/P-gp expression.
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19
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Muzza M, Colombo C, Cirello V, Perrino M, Vicentini L, Fugazzola L. Oxidative stress and the subcellular localization of the telomerase reverse transcriptase (TERT) in papillary thyroid cancer. Mol Cell Endocrinol 2016; 431:54-61. [PMID: 27164443 DOI: 10.1016/j.mce.2016.05.005] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Revised: 05/04/2016] [Accepted: 05/04/2016] [Indexed: 01/23/2023]
Abstract
During hormonogenesis, thyrocytes are physiologically exposed to high levels of oxidative stress (OS) which could either be involved in the pathogenesis of thyroid cancer or exert a cytotoxic effect. We analyzed the oxidative status of papillary thyroid cancer (PTC) both directly, by measuring H2O2 generation by NADPH oxidases (NOXs), and indirectly, by evaluating the antioxidant activity of glutathione peroxidase (GPX), which neutralizes H2O2 excess, and the lipid peroxidation (LP). Moreover, we investigated the subcellular localization of telomerase reverse transcriptase (TERT), and the H2O2 levels in the mitochondria of tumor and normal tissues. The calcium-dependent and independent H2O2 generation activity was significantly higher in tumors than in normal tissues. The GPX activity was higher in PTCs than in normal tissues, and, consistently, no differences were found in LP levels. Moreover, while TERT nuclear expression was similar in tumor and normal tissues, the mitochondrial localization was significantly higher in tumors. At the mitochondrial level, no differences were found in H2O2 generation between tumor and normal tissues. In conclusion, present data demonstrate that the intracellular H2O2 generation by NOXs is significantly higher in PTCs than in normal thyroid tissues. The increased GPX activity found in tumors counteracts the potential cytotoxic effects of high OS exposure. The significantly higher mitochondrial localization of TERT in tumors is consistent with its shuttling from the nucleus upon exposure to high OS. Finally, mitochondrial OS was not significantly different in tumors and normal tissues, supporting the postulated role of mitochondrial TERT in the control of local H2O2 production.
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Affiliation(s)
- Marina Muzza
- Endocrine Unit, Fondazione IRCCS Ca' Granda, Milan, Italy; Department of Clinical Sciences and Community Health, University of Milan, Milan, Italy
| | - Carla Colombo
- Endocrine Unit, Fondazione IRCCS Ca' Granda, Milan, Italy; Department of Clinical Sciences and Community Health, University of Milan, Milan, Italy
| | - Valentina Cirello
- Endocrine Unit, Fondazione IRCCS Ca' Granda, Milan, Italy; Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
| | - Michela Perrino
- Endocrine Unit, Fondazione IRCCS Ca' Granda, Milan, Italy; Department of Clinical Sciences and Community Health, University of Milan, Milan, Italy
| | | | - Laura Fugazzola
- Endocrine Unit, Fondazione IRCCS Ca' Granda, Milan, Italy; Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy.
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20
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Beyer AM, Freed JK, Durand MJ, Riedel M, Ait-Aissa K, Green P, Hockenberry JC, Morgan RG, Donato AJ, Peleg R, Gasparri M, Rokkas CK, Santos JH, Priel E, Gutterman DD. Critical Role for Telomerase in the Mechanism of Flow-Mediated Dilation in the Human Microcirculation. Circ Res 2015; 118:856-66. [PMID: 26699654 PMCID: PMC4772813 DOI: 10.1161/circresaha.115.307918] [Citation(s) in RCA: 69] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/12/2015] [Accepted: 12/21/2015] [Indexed: 02/02/2023]
Abstract
RATIONALE Telomerase is a nuclear regulator of telomere elongation with recent reports suggesting a role in regulation of mitochondrial reactive oxygen species. Flow-mediated dilation in patients with cardiovascular disease is dependent on the formation of reactive oxygen species. OBJECTIVE We examined the hypothesis that telomerase activity modulates microvascular flow-mediated dilation, and loss of telomerase activity contributes to the change of mediator from nitric oxide to mitochondrial hydrogen peroxide in patients with coronary artery disease (CAD). METHODS AND RESULTS Human coronary and adipose arterioles were isolated for videomicroscopy. Flow-mediated dilation was measured in vessels pretreated with the telomerase inhibitor BIBR-1532 or vehicle. Statistical differences between groups were determined using a 2-way analysis of variance repeated measure (n≥4; P<0.05). L-NAME (N(ω)-nitro-L-arginine methyl ester; nitric oxide synthase inhibitor) abolished flow-mediated dilation in arterioles from subjects without CAD, whereas polyethylene glycol-catalase (PEG-catalase; hydrogen peroxide scavenger) had no effect. After exposure to BIBR-1532, arterioles from non-CAD subjects maintained the magnitude of dilation but changed the mediator from nitric oxide to mitochondrial hydrogen peroxide (% max diameter at 100 cm H2O: vehicle 74.6±4.1, L-NAME 37.0±2.0*, PEG-catalase 82.1±2.8; BIBR-1532 69.9±4.0, L-NAME 84.7±2.2, PEG-catalase 36.5±6.9*). Conversely, treatment of microvessels from CAD patients with the telomerase activator AGS 499 converted the PEG-catalase-inhibitable dilation to one mediated by nitric oxide (% max diameter at 100 cm H2O: adipose, AGS 499 78.5±3.9; L-NAME 10.9±17.5*; PEG-catalase 79.2±4.9). Endothelial-independent dilation was not altered with either treatment. CONCLUSIONS We have identified a novel role for telomerase in re-establishing a physiological mechanism of vasodilation in arterioles from subjects with CAD. These findings suggest a new target for reducing the oxidative milieu in the microvasculature of patients with CAD.
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Affiliation(s)
- Andreas M Beyer
- From the Department of Medicine, Cardiovascular Center (A.M.B., M.J.D., M.R., K.A.-A., J.C.H., D.D.G.), Department of Physiology (A.M.B., K.A.-A., D.D.G.), Department of Anesthesiology (J.K.F.), Department of Physical Medicine and Rehabilitation (M.J.D.), and Departments of Surgery, Cardiothoracic Surgery (M.G., C.K.R.), Medical College of Wisconsin, Milwaukee; Departments of Pharmacology and Physiology, New Jersey Medical School of Rutgers, Newark (P.G., J.H.S.); Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City (R.G.M., A.J.D.); and Shraga Segal Departments of Immunology and Microbiology, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel (R.P., E.P.).
| | - Julie K Freed
- From the Department of Medicine, Cardiovascular Center (A.M.B., M.J.D., M.R., K.A.-A., J.C.H., D.D.G.), Department of Physiology (A.M.B., K.A.-A., D.D.G.), Department of Anesthesiology (J.K.F.), Department of Physical Medicine and Rehabilitation (M.J.D.), and Departments of Surgery, Cardiothoracic Surgery (M.G., C.K.R.), Medical College of Wisconsin, Milwaukee; Departments of Pharmacology and Physiology, New Jersey Medical School of Rutgers, Newark (P.G., J.H.S.); Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City (R.G.M., A.J.D.); and Shraga Segal Departments of Immunology and Microbiology, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel (R.P., E.P.)
| | - Matthew J Durand
- From the Department of Medicine, Cardiovascular Center (A.M.B., M.J.D., M.R., K.A.-A., J.C.H., D.D.G.), Department of Physiology (A.M.B., K.A.-A., D.D.G.), Department of Anesthesiology (J.K.F.), Department of Physical Medicine and Rehabilitation (M.J.D.), and Departments of Surgery, Cardiothoracic Surgery (M.G., C.K.R.), Medical College of Wisconsin, Milwaukee; Departments of Pharmacology and Physiology, New Jersey Medical School of Rutgers, Newark (P.G., J.H.S.); Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City (R.G.M., A.J.D.); and Shraga Segal Departments of Immunology and Microbiology, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel (R.P., E.P.)
| | - Michael Riedel
- From the Department of Medicine, Cardiovascular Center (A.M.B., M.J.D., M.R., K.A.-A., J.C.H., D.D.G.), Department of Physiology (A.M.B., K.A.-A., D.D.G.), Department of Anesthesiology (J.K.F.), Department of Physical Medicine and Rehabilitation (M.J.D.), and Departments of Surgery, Cardiothoracic Surgery (M.G., C.K.R.), Medical College of Wisconsin, Milwaukee; Departments of Pharmacology and Physiology, New Jersey Medical School of Rutgers, Newark (P.G., J.H.S.); Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City (R.G.M., A.J.D.); and Shraga Segal Departments of Immunology and Microbiology, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel (R.P., E.P.)
| | - Karima Ait-Aissa
- From the Department of Medicine, Cardiovascular Center (A.M.B., M.J.D., M.R., K.A.-A., J.C.H., D.D.G.), Department of Physiology (A.M.B., K.A.-A., D.D.G.), Department of Anesthesiology (J.K.F.), Department of Physical Medicine and Rehabilitation (M.J.D.), and Departments of Surgery, Cardiothoracic Surgery (M.G., C.K.R.), Medical College of Wisconsin, Milwaukee; Departments of Pharmacology and Physiology, New Jersey Medical School of Rutgers, Newark (P.G., J.H.S.); Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City (R.G.M., A.J.D.); and Shraga Segal Departments of Immunology and Microbiology, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel (R.P., E.P.)
| | - Paula Green
- From the Department of Medicine, Cardiovascular Center (A.M.B., M.J.D., M.R., K.A.-A., J.C.H., D.D.G.), Department of Physiology (A.M.B., K.A.-A., D.D.G.), Department of Anesthesiology (J.K.F.), Department of Physical Medicine and Rehabilitation (M.J.D.), and Departments of Surgery, Cardiothoracic Surgery (M.G., C.K.R.), Medical College of Wisconsin, Milwaukee; Departments of Pharmacology and Physiology, New Jersey Medical School of Rutgers, Newark (P.G., J.H.S.); Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City (R.G.M., A.J.D.); and Shraga Segal Departments of Immunology and Microbiology, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel (R.P., E.P.)
| | - Joseph C Hockenberry
- From the Department of Medicine, Cardiovascular Center (A.M.B., M.J.D., M.R., K.A.-A., J.C.H., D.D.G.), Department of Physiology (A.M.B., K.A.-A., D.D.G.), Department of Anesthesiology (J.K.F.), Department of Physical Medicine and Rehabilitation (M.J.D.), and Departments of Surgery, Cardiothoracic Surgery (M.G., C.K.R.), Medical College of Wisconsin, Milwaukee; Departments of Pharmacology and Physiology, New Jersey Medical School of Rutgers, Newark (P.G., J.H.S.); Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City (R.G.M., A.J.D.); and Shraga Segal Departments of Immunology and Microbiology, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel (R.P., E.P.)
| | - R Garret Morgan
- From the Department of Medicine, Cardiovascular Center (A.M.B., M.J.D., M.R., K.A.-A., J.C.H., D.D.G.), Department of Physiology (A.M.B., K.A.-A., D.D.G.), Department of Anesthesiology (J.K.F.), Department of Physical Medicine and Rehabilitation (M.J.D.), and Departments of Surgery, Cardiothoracic Surgery (M.G., C.K.R.), Medical College of Wisconsin, Milwaukee; Departments of Pharmacology and Physiology, New Jersey Medical School of Rutgers, Newark (P.G., J.H.S.); Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City (R.G.M., A.J.D.); and Shraga Segal Departments of Immunology and Microbiology, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel (R.P., E.P.)
| | - Anthony J Donato
- From the Department of Medicine, Cardiovascular Center (A.M.B., M.J.D., M.R., K.A.-A., J.C.H., D.D.G.), Department of Physiology (A.M.B., K.A.-A., D.D.G.), Department of Anesthesiology (J.K.F.), Department of Physical Medicine and Rehabilitation (M.J.D.), and Departments of Surgery, Cardiothoracic Surgery (M.G., C.K.R.), Medical College of Wisconsin, Milwaukee; Departments of Pharmacology and Physiology, New Jersey Medical School of Rutgers, Newark (P.G., J.H.S.); Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City (R.G.M., A.J.D.); and Shraga Segal Departments of Immunology and Microbiology, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel (R.P., E.P.)
| | - Refael Peleg
- From the Department of Medicine, Cardiovascular Center (A.M.B., M.J.D., M.R., K.A.-A., J.C.H., D.D.G.), Department of Physiology (A.M.B., K.A.-A., D.D.G.), Department of Anesthesiology (J.K.F.), Department of Physical Medicine and Rehabilitation (M.J.D.), and Departments of Surgery, Cardiothoracic Surgery (M.G., C.K.R.), Medical College of Wisconsin, Milwaukee; Departments of Pharmacology and Physiology, New Jersey Medical School of Rutgers, Newark (P.G., J.H.S.); Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City (R.G.M., A.J.D.); and Shraga Segal Departments of Immunology and Microbiology, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel (R.P., E.P.)
| | - Mario Gasparri
- From the Department of Medicine, Cardiovascular Center (A.M.B., M.J.D., M.R., K.A.-A., J.C.H., D.D.G.), Department of Physiology (A.M.B., K.A.-A., D.D.G.), Department of Anesthesiology (J.K.F.), Department of Physical Medicine and Rehabilitation (M.J.D.), and Departments of Surgery, Cardiothoracic Surgery (M.G., C.K.R.), Medical College of Wisconsin, Milwaukee; Departments of Pharmacology and Physiology, New Jersey Medical School of Rutgers, Newark (P.G., J.H.S.); Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City (R.G.M., A.J.D.); and Shraga Segal Departments of Immunology and Microbiology, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel (R.P., E.P.)
| | - Chris K Rokkas
- From the Department of Medicine, Cardiovascular Center (A.M.B., M.J.D., M.R., K.A.-A., J.C.H., D.D.G.), Department of Physiology (A.M.B., K.A.-A., D.D.G.), Department of Anesthesiology (J.K.F.), Department of Physical Medicine and Rehabilitation (M.J.D.), and Departments of Surgery, Cardiothoracic Surgery (M.G., C.K.R.), Medical College of Wisconsin, Milwaukee; Departments of Pharmacology and Physiology, New Jersey Medical School of Rutgers, Newark (P.G., J.H.S.); Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City (R.G.M., A.J.D.); and Shraga Segal Departments of Immunology and Microbiology, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel (R.P., E.P.)
| | - Janine H Santos
- From the Department of Medicine, Cardiovascular Center (A.M.B., M.J.D., M.R., K.A.-A., J.C.H., D.D.G.), Department of Physiology (A.M.B., K.A.-A., D.D.G.), Department of Anesthesiology (J.K.F.), Department of Physical Medicine and Rehabilitation (M.J.D.), and Departments of Surgery, Cardiothoracic Surgery (M.G., C.K.R.), Medical College of Wisconsin, Milwaukee; Departments of Pharmacology and Physiology, New Jersey Medical School of Rutgers, Newark (P.G., J.H.S.); Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City (R.G.M., A.J.D.); and Shraga Segal Departments of Immunology and Microbiology, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel (R.P., E.P.)
| | - Esther Priel
- From the Department of Medicine, Cardiovascular Center (A.M.B., M.J.D., M.R., K.A.-A., J.C.H., D.D.G.), Department of Physiology (A.M.B., K.A.-A., D.D.G.), Department of Anesthesiology (J.K.F.), Department of Physical Medicine and Rehabilitation (M.J.D.), and Departments of Surgery, Cardiothoracic Surgery (M.G., C.K.R.), Medical College of Wisconsin, Milwaukee; Departments of Pharmacology and Physiology, New Jersey Medical School of Rutgers, Newark (P.G., J.H.S.); Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City (R.G.M., A.J.D.); and Shraga Segal Departments of Immunology and Microbiology, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel (R.P., E.P.)
| | - David D Gutterman
- From the Department of Medicine, Cardiovascular Center (A.M.B., M.J.D., M.R., K.A.-A., J.C.H., D.D.G.), Department of Physiology (A.M.B., K.A.-A., D.D.G.), Department of Anesthesiology (J.K.F.), Department of Physical Medicine and Rehabilitation (M.J.D.), and Departments of Surgery, Cardiothoracic Surgery (M.G., C.K.R.), Medical College of Wisconsin, Milwaukee; Departments of Pharmacology and Physiology, New Jersey Medical School of Rutgers, Newark (P.G., J.H.S.); Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City (R.G.M., A.J.D.); and Shraga Segal Departments of Immunology and Microbiology, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel (R.P., E.P.)
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Lee YJ, Jang BK. The Role of Autophagy in Hepatocellular Carcinoma. Int J Mol Sci 2015; 16:26629-43. [PMID: 26561802 PMCID: PMC4661843 DOI: 10.3390/ijms161125984] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2015] [Revised: 10/26/2015] [Accepted: 10/30/2015] [Indexed: 12/23/2022] Open
Abstract
Autophagy is a catabolic process involved in cellular homeostasis under basal and stressed conditions. Autophagy is crucial for normal liver physiology and the pathogenesis of liver diseases. During the last decade, the function of autophagy in hepatocellular carcinoma (HCC) has been evaluated extensively. Currently, autophagy is thought to play a dual role in HCC, i.e., autophagy is involved in tumorigenesis and tumor suppression. Recent investigations of autophagy have suggested that autophagy biomarkers can facilitate HCC prognosis and the establishment of therapeutic approaches. In this review, we briefly summarize the current understanding of autophagy and discuss recent evidence for its role in HCC.
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MESH Headings
- AMP-Activated Protein Kinases/genetics
- AMP-Activated Protein Kinases/metabolism
- Animals
- Apoptosis Regulatory Proteins/genetics
- Apoptosis Regulatory Proteins/metabolism
- Autophagy/genetics
- Autophagy-Related Protein-1 Homolog
- Beclin-1
- Biomarkers, Tumor/genetics
- Biomarkers, Tumor/metabolism
- Carcinoma, Hepatocellular/diagnosis
- Carcinoma, Hepatocellular/genetics
- Carcinoma, Hepatocellular/metabolism
- Carcinoma, Hepatocellular/pathology
- Cell Transformation, Neoplastic/genetics
- Cell Transformation, Neoplastic/metabolism
- Cell Transformation, Neoplastic/pathology
- Gene Expression Regulation, Neoplastic
- Humans
- Intracellular Signaling Peptides and Proteins/genetics
- Intracellular Signaling Peptides and Proteins/metabolism
- Liver Neoplasms/diagnosis
- Liver Neoplasms/genetics
- Liver Neoplasms/metabolism
- Liver Neoplasms/pathology
- Mechanistic Target of Rapamycin Complex 1
- Mice
- Multiprotein Complexes/genetics
- Multiprotein Complexes/metabolism
- Prognosis
- Protein Serine-Threonine Kinases/genetics
- Protein Serine-Threonine Kinases/metabolism
- Signal Transduction
- TOR Serine-Threonine Kinases/genetics
- TOR Serine-Threonine Kinases/metabolism
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Affiliation(s)
- Yoo Jin Lee
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Keimyung University School of Medicine, Daegu 700-712, Korea.
| | - Byoung Kuk Jang
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Keimyung University School of Medicine, Daegu 700-712, Korea.
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