1
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Bingham R, McCarthy H, Buckley N. Exploring Retrograde Trafficking: Mechanisms and Consequences in Cancer and Disease. Traffic 2024; 25:e12931. [PMID: 38415291 DOI: 10.1111/tra.12931] [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: 11/29/2023] [Revised: 01/25/2024] [Accepted: 01/31/2024] [Indexed: 02/29/2024]
Abstract
Retrograde trafficking (RT) orchestrates the intracellular movement of cargo from the plasma membrane, endosomes, Golgi or endoplasmic reticulum (ER)-Golgi intermediate compartment (ERGIC) in an inward/ER-directed manner. RT works as the opposing movement to anterograde trafficking (outward secretion), and the two work together to maintain cellular homeostasis. This is achieved through maintaining cell polarity, retrieving proteins responsible for anterograde trafficking and redirecting proteins that become mis-localised. However, aberrant RT can alter the correct location of key proteins, and thus inhibit or indeed change their canonical function, potentially causing disease. This review highlights the recent advances in the understanding of how upregulation, downregulation or hijacking of RT impacts the localisation of key proteins in cancer and disease to drive progression. Cargoes impacted by aberrant RT are varied amongst maladies including neurodegenerative diseases, autoimmune diseases, bacterial and viral infections (including SARS-CoV-2), and cancer. As we explore the intricacies of RT, it becomes increasingly apparent that it holds significant potential as a target for future therapies to offer more effective interventions in a wide range of pathological conditions.
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Affiliation(s)
- Rachel Bingham
- School of Pharmacy, Queen's University Belfast, Belfast, UK
| | - Helen McCarthy
- School of Pharmacy, Queen's University Belfast, Belfast, UK
| | - Niamh Buckley
- School of Pharmacy, Queen's University Belfast, Belfast, UK
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2
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Tarle M, Raguž M, Muller D, Lukšić I. Nuclear Epidermal Growth Factor Receptor Overexpression as a Survival Predictor in Oral Squamous Cell Carcinoma. Int J Mol Sci 2023; 24:ijms24065816. [PMID: 36982894 PMCID: PMC10056291 DOI: 10.3390/ijms24065816] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2023] [Revised: 03/14/2023] [Accepted: 03/17/2023] [Indexed: 03/30/2023] Open
Abstract
The aim of this study was to determine, by immunohistochemical methods, the expression of nEGFR and markers of cell proliferation (Ki-67), cell cycle (mEGFR, p53, cyclin D1), and tumor stem cells (ABCG2) in 59 pathohistological samples of healthy oral mucosa, 50 oral premalignant changes (leukoplakia and erythroplakia), and 52 oral squamous cell carcinomas (OSCC). An increase in the expression of mEGFR and nEGFR was found with the development of the disease (p < 0.0001). In the group of patients with leukoplakia and erythroplakia, we found a positive correlation between nEGFR and Ki67, p53, cyclin D1, and mEGFR, whereas in the group of patients with OSCC, we found a positive correlation between nEGFR and Ki67, mEGFR (p < 0.05). Tumors without perineural (PNI) invasion had a higher expression of p53 protein than tumors with PNI (p = 0.02). Patients with OSCC and overexpression of nEGFR had shorter overall survival (p = 0.004). The results of this study suggest a potentially important independent role of nEGFR in oral carcinogenesis.
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Affiliation(s)
- Marko Tarle
- Department of Maxillofacial Surgery, Dubrava University Hospital, 10000 Zagreb, Croatia
- School of Dental Medicine, University of Zagreb, Gundulićeva 5, 10000 Zagreb, Croatia
| | - Marina Raguž
- Department of Neurosurgery, Dubrava University Hospital, 10000 Zagreb, Croatia
- School of Medicine, Catholic University of Croatia, 10000 Zagreb, Croatia
| | - Danko Muller
- Department of Pathology and Cytology, Dubrava University Hospital, 10000 Zagreb, Croatia
- School of Medicine, University of Zagreb, 10000 Zagreb, Croatia
| | - Ivica Lukšić
- Department of Maxillofacial Surgery, Dubrava University Hospital, 10000 Zagreb, Croatia
- School of Medicine, University of Zagreb, 10000 Zagreb, Croatia
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3
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Huo Y, Cao K, Kou B, Chai M, Dou S, Chen D, Shi Y, Liu X. TP53BP2: Roles in suppressing tumorigenesis and therapeutic opportunities. Genes Dis 2022. [PMID: 37492707 PMCID: PMC10363587 DOI: 10.1016/j.gendis.2022.08.014] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022] Open
Abstract
Malignant tumor is still a major problem worldwide. During tumorigenesis or tumor development, tumor suppressor p53-binding protein 2 (TP53BP2), also known as apoptosis stimulating protein 2 of p53 (ASPP2), plays a critical role in p53 dependent and independent manner. Expression of TP53BP2 is highly correlated with the prognosis and survival rate of malignant tumor patients. TP53BP2 can interact with p53, NF-κB p65, Bcl-2, HCV core protein, PP1, YAP, CagA, RAS, PAR3, and other proteins to regulate cell function. Moreover, TP53BP2 can also regulate the proliferation, apoptosis, autophagy, migration, EMT and drug resistance of tumor cells through downstream signaling pathways, such as NF-κB, RAS/MAPK, mevalonate, TGF-β1, PI3K/AKT, aPKC-ι/GLI1 and autophagy pathways. As a potential therapeutic target, TP53BP2 has been attracted more attention. We review the role of TP53BP2 in tumorigenesis or tumor development and the signal pathway involved in TP53BP2, which may provide more deep insight and strategies for tumor treatment.
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4
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Xing F, Zhao D, Wu SY, Tyagi A, Wu K, Sharma S, Liu Y, Deshpande R, Wang Y, Cleary J, Miller LD, Chittiboyina AG, Yalamanchili C, Mo YY, Watabe K. Epigenetic and Posttranscriptional Modulation of SOS1 Can Promote Breast Cancer Metastasis through Obesity-Activated c-Met Signaling in African-American Women. Cancer Res 2021; 81:3008-3021. [PMID: 33446575 DOI: 10.1158/0008-5472.can-19-4031] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2019] [Revised: 07/28/2020] [Accepted: 01/07/2021] [Indexed: 11/16/2022]
Abstract
Ethnicity is considered to be one of the major risk factors in certain subtypes of breast cancer. However, the mechanism of this racial disparity remains poorly understood. Here, we demonstrate that SOS1, a key regulator of Ras pathway, is highly expressed in African-American (AA) patients with breast cancer compared with Caucasian-American patients. Because of the higher obesity rate in AA women, increased levels of SOS1 facilitated signal transduction of the c-Met pathway, which was highly activated in AA patients with breast cancer via hepatocyte growth factor secreted from adipocytes. Elevated expression of SOS1 also enhanced cancer stemness through upregulation of PTTG1 and promoted M2 polarization of macrophages by CCL2 in metastatic sites. SOS1 was epigenetically regulated by a super-enhancer identified by H3K27ac in AA patients. Knockout of the super-enhancer by CRISPR in AA cell lines significantly reduced SOS1 expression. Furthermore, SOS1 was posttranscriptionally regulated by miR-483 whose expression is reduced in AA patients through histone trimethylation (H3K27me3) on its promoter. The natural compound, taxifolin, suppressed signaling transduction of SOS1 by blocking the interaction between SOS1 and Grb2, suggesting a potential utility of this compound as a therapeutic agent for AA patients with breast cancer. SIGNIFICANCE: These findings elucidate the signaling network of SOS1-mediated metastasis in African-American patients, from the epigenetic upregulation of SOS1 to the identification of taxifolin as a potential therapeutic strategy against SOS1-driven tumor progression.
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Affiliation(s)
- Fei Xing
- Department of Cancer Biology, Wake Forest University School of Medicine, Winston-Salem, North Carolina.
| | - Dan Zhao
- Department of Cancer Biology, Wake Forest University School of Medicine, Winston-Salem, North Carolina
| | - Shih-Ying Wu
- Department of Cancer Biology, Wake Forest University School of Medicine, Winston-Salem, North Carolina
| | - Abhishek Tyagi
- Department of Cancer Biology, Wake Forest University School of Medicine, Winston-Salem, North Carolina
| | - Kerui Wu
- Department of Cancer Biology, Wake Forest University School of Medicine, Winston-Salem, North Carolina
| | - Sambad Sharma
- Department of Cancer Biology, Wake Forest University School of Medicine, Winston-Salem, North Carolina
| | - Yin Liu
- Department of Cancer Biology, Wake Forest University School of Medicine, Winston-Salem, North Carolina
| | - Ravindra Deshpande
- Department of Cancer Biology, Wake Forest University School of Medicine, Winston-Salem, North Carolina
| | - Yuezhu Wang
- Department of Cancer Biology, Wake Forest University School of Medicine, Winston-Salem, North Carolina
| | - Jacob Cleary
- Department of Cancer Biology, Wake Forest University School of Medicine, Winston-Salem, North Carolina
| | - Lance D Miller
- Department of Cancer Biology, Wake Forest University School of Medicine, Winston-Salem, North Carolina
| | - Amar G Chittiboyina
- National Center for Natural Products Research, School of Pharmacy, The University of Mississippi, Oxford, Mississippi
| | - Chinni Yalamanchili
- National Center for Natural Products Research, School of Pharmacy, The University of Mississippi, Oxford, Mississippi
| | - Yin-Yuan Mo
- Cancer Institute, University of Mississippi Medical Center, Jackson, Mississippi
| | - Kounosuke Watabe
- Department of Cancer Biology, Wake Forest University School of Medicine, Winston-Salem, North Carolina.
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5
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Mir-30b-5p Promotes Proliferation, Migration, and Invasion of Breast Cancer Cells via Targeting ASPP2. BIOMED RESEARCH INTERNATIONAL 2020; 2020:7907269. [PMID: 32420372 PMCID: PMC7210518 DOI: 10.1155/2020/7907269] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Revised: 01/06/2020] [Accepted: 01/16/2020] [Indexed: 12/18/2022]
Abstract
Triple-negative breast cancer (TNBC) is the most aggressive subtypes of breast cancer, which has few effective targeted therapies. Various sources of evidence confirm that microRNAs (miRNAs) contribute to the progression and metastasis of human breast cancer. However, the molecular mechanisms underlying the changes in miRNAs expression and the regulation of miRNAs functions have not been well clarified. In this study, we found that the expression of miR-30b-5p was upregulated in breast cancer tissues and breast cancer cell lines, compared to paracancer tissues and normal breast cell lines. Moreover, induced overexpression of miR-30b-5p promoted the MDA-MB-231 and HCC 1937 cell growth, migration, and invasion and reduced the cellular apoptosis. Further studies confirmed that miR-30b-5p could directly target ASPP2 and then activate the AKT signaling pathway. Our results suggested that miR-30b-5p could act as a tumor promoter in TNBC. The newly identified miR-30b-5p/ASPP2/AKT axis represents a novel therapeutic strategy for treating TNBC.
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Xu P, Yao J, Ji J, Shi H, Jiao Y, Hao S, Chen D, Shi H. Deficiency of apoptosis-stimulating protein 2 of p53 protects mice from acute hepatic injury induced by CCl 4 via autophagy. Toxicol Lett 2019; 316:85-93. [PMID: 31513885 DOI: 10.1016/j.toxlet.2019.09.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 09/02/2019] [Accepted: 09/07/2019] [Indexed: 01/20/2023]
Abstract
BACKGROUND Apoptosis-stimulating protein 2 of p53 (ASPP2) has a variety of biological functions, and is involved in cellular apoptosis, autophagy and inflammatory reaction. However, the role of ASPP2 in acute hepatic injury remains unclear. METHODS We established an animal model of acute hepatic injury by intraperitoneal injection of CCl4. The expression profile of ASPP2 was measured in wild type (ASPP2+/+) mice with acute hepatic injury induced by CCl4. Hepatic pathological changes and liver function, apoptosis, inflammation and autophagic levels were measured in ASPP2+/+and ASPP2 haploid deletion (ASPP2+/-) mice with acute hepatic injury, respectively. After 3-methyladenine (3-MA) treatment, indicators of hepatic injury were observed in ASPP2+/+and ASPP2+/- mice with CCl4 injection. RESULTS During the development of acute hepatic injury, ASPP2 expression significantly upregulated at 24 h and 48 h after CCl4 injection. ASPP2 haplotype deletion protected against acute hepatic injury, and this was mainly reflected in decreased ALT and AST levels, less hepatic tissue hemorrhage and necrosis, and reduced cellular inflammation and apoptosis in ASPP2+/- mice compared with ASPP2+/+ mice with acute hepatic injury. ASPP2 haploid deletion activates autophagy in mice with acute hepatic injury, and protects mice from acute hepatic injury via the autophagic signal pathway. CONCLUSION ASPP2 haplotype deletion protected mice against acute hepatic injury through autophagy activation, which inhibited inflammation and apoptosis in acute hepatic injury.
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Affiliation(s)
- Ping Xu
- Beijing Institute of Hepatology, Beijing Youan Hospital, Capital Medical University, Beijing, 100069, China; Beijing Engineering Research Center for Precision Medicine and Transformation of Hepatitis and Liver Cancer, China
| | - Jia Yao
- Shanxi Dayi Hospital Affiliated to Shanxi Medical University, China
| | - Jing Ji
- Shanxi Provincial People's Hospital Affiliated to Shanxi Medical University, China
| | - Honglin Shi
- Beijing Institute of Hepatology, Beijing Youan Hospital, Capital Medical University, Beijing, 100069, China; Beijing Engineering Research Center for Precision Medicine and Transformation of Hepatitis and Liver Cancer, China
| | - Yan Jiao
- Beijing Institute of Hepatology, Beijing Youan Hospital, Capital Medical University, Beijing, 100069, China; Beijing Engineering Research Center for Precision Medicine and Transformation of Hepatitis and Liver Cancer, China
| | - ShaSha Hao
- Shanxi Dayi Hospital Affiliated to Shanxi Medical University, China
| | - Dexi Chen
- Beijing Institute of Hepatology, Beijing Youan Hospital, Capital Medical University, Beijing, 100069, China; Beijing Engineering Research Center for Precision Medicine and Transformation of Hepatitis and Liver Cancer, China
| | - Hongbo Shi
- Beijing Institute of Hepatology, Beijing Youan Hospital, Capital Medical University, Beijing, 100069, China; Beijing Engineering Research Center for Precision Medicine and Transformation of Hepatitis and Liver Cancer, China.
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7
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Pang L, Xu L, Yuan C, Li X, Zhang X, Wang W, Guo X, Ouyang Y, Qiao L, Wang Z, Liu K. Activation of EGFR-KLF4 positive feedback loop results in acquired resistance to sorafenib in hepatocellular carcinoma. Mol Carcinog 2019; 58:2118-2126. [PMID: 31465134 DOI: 10.1002/mc.23102] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2019] [Revised: 08/06/2019] [Accepted: 08/07/2019] [Indexed: 11/08/2022]
Abstract
Sorafenib is the standard first-line systemic chemotherapeutic drugs for advanced hepatocellular carcinoma (HCC), but acquired resistance to sorafenib is frequently observed in clinical practice. In this study, we first produced three sorafenib resistance (SR) HCC cell lines by using two human HCC cell lines (Hep3B and Huh7) and a human primary HCC cell line. We identified that epidermal growth factor receptor (EGFR) and Kruppel-like factor 4 (KLF4) are dramatically increased in the three SR HCC cell lines. Either inhibition of tyrosine kinase activity of EGFR with Erlotinib/Icotinib or inhibition of KLF4 expression with short hairpin RNA recovered the response of three SR HCC cell lines to sorafenib, suggesting the critical roles of EGFR tyrosine kinase and KLF4 on inducing SR. Luciferase activity and chromatin immunoprecipitation assays further determined that KLF4 promoted EGFR expression through inducing its transcription by directly binding to its promoter. EGFR, conversely, could also promote KLF4 expression through inducing its transcription by binding to its promoter in a tyrosine kinase-dependent manner, suggesting that a positive feedback loop formed by EGFR and KLF4 further amplifies their effects on inducing SR. Up to now, our findings that KLF4 induces the development of SR and it cooperates with EGFR to form a positive feedback loop to amplify their SR-inducing abilities have rarely been reported. Our findings bear possible implications for the improvement of the efficacy of sorafenib in HCC.
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Affiliation(s)
- Lijun Pang
- Beijing Youan Hospital, Capital Medical University, Beijing, China.,Beijing Institute of Hepatology, Beijing, China
| | - Lin Xu
- Department of Acupuncture and Mini-invasive Oncology, Beijing University of Chinese Medicine Third Affiliated Hospital, Beijing, China
| | - Chunwang Yuan
- Beijing Youan Hospital, Capital Medical University, Beijing, China
| | - Xiuhui Li
- Beijing Youan Hospital, Capital Medical University, Beijing, China
| | - Xiangying Zhang
- Beijing Youan Hospital, Capital Medical University, Beijing, China.,Beijing Institute of Hepatology, Beijing, China
| | - Wenjing Wang
- Beijing Youan Hospital, Capital Medical University, Beijing, China.,Beijing Institute of Hepatology, Beijing, China
| | - Xianghua Guo
- Beijing Youan Hospital, Capital Medical University, Beijing, China.,Beijing Institute of Hepatology, Beijing, China
| | - Yabo Ouyang
- Beijing Youan Hospital, Capital Medical University, Beijing, China.,Beijing Institute of Hepatology, Beijing, China
| | - Luxin Qiao
- Beijing Youan Hospital, Capital Medical University, Beijing, China.,Beijing Institute of Hepatology, Beijing, China
| | - Zhenchang Wang
- Department of Radiology, Capital Medical University, Beijing, China
| | - Kai Liu
- Beijing Youan Hospital, Capital Medical University, Beijing, China.,Beijing Institute of Hepatology, Beijing, China
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8
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Yan G, Saeed MEM, Foersch S, Schneider J, Roth W, Efferth T. Relationship between EGFR expression and subcellular localization with cancer development and clinical outcome. Oncotarget 2019; 10:1918-1931. [PMID: 30956774 PMCID: PMC6443015 DOI: 10.18632/oncotarget.26727] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2018] [Accepted: 02/15/2019] [Indexed: 12/11/2022] Open
Abstract
Epidermal growth factor receptor (EGFR) as a prevalent oncogene regulates proliferation, apoptosis and differentiation and thereby contributes to carcinogenesis. Even though, the documentation on its clinical relevance is surprisingly heterogeneous in the scientific literature. Here, we systematically investigated the correlation of mRNA to survival time and pathological parameters by analyzing 30 datasets in silico. Furthermore, the prognostic value of membrane-bound, cytoplasmic (mcEGFR) and nuclear expression (nEGFR) of EGFR was experimentally analyzed by immunohistochemical staining of 502 biopsies from 27 tumor types. We found that protein expression of EGFR showed better prognostic efficiency compared to mRNA, and that mcEGFR expression was positively correlated with nEGFR expression (p < 0.001). Unexpectedly, both mcEGFR and nEGFR expression were associated with low T stage (p < 0.001 and p = 0.004; respectively). Moreover, positive mcEGFR was significantly related to high differentiation (p = 0.027). No significant correlation was found with any other pathological parameters. Collectively, our results imply that the oncogenic function of EGFR may be more related to nascent stages of carcinogenesis than to advanced and progressive tumors, which may as well explain at least partially the occurrence of secondary resistance against EGFR-directed therapy.
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Affiliation(s)
- Ge Yan
- Department of Pharmaceutical Biology, Institute of Pharmacy and Biochemistry, Johannes Gutenberg University, Mainz, Germany
| | - Mohamed E M Saeed
- Department of Pharmaceutical Biology, Institute of Pharmacy and Biochemistry, Johannes Gutenberg University, Mainz, Germany
| | | | - Jose Schneider
- Universidad Rey Juan Carlos, Facultad de Ciencias de la Salud, Móstoles, Spain
| | - Wilfried Roth
- Institute of Pathology, University Medical Center, Mainz, Germany
| | - Thomas Efferth
- Department of Pharmaceutical Biology, Institute of Pharmacy and Biochemistry, Johannes Gutenberg University, Mainz, Germany
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9
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Yoshikawa Y, Taniguchi K, Tsujino T, Heishima K, Inamoto T, Takai T, Minami K, Azuma H, Miyata K, Hayashi K, Kataoka K, Akao Y. Anti-cancer Effects of a Chemically Modified miR-143 on Bladder Cancer by Either Systemic or Intravesical Treatment. MOLECULAR THERAPY-METHODS & CLINICAL DEVELOPMENT 2019; 13:290-302. [PMID: 30911586 PMCID: PMC6416526 DOI: 10.1016/j.omtm.2019.02.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Accepted: 02/13/2019] [Indexed: 12/29/2022]
Abstract
We developed a novel chemically modified miR-143 (miR-143#12), and with it we investigated the contribution of miR-143 to the pathogenesis of bladder cancer (BC), in which miR-143 is extremely downregulated. Since miR-143 silenced K-RAS and RAS effector-signaling molecules Erk and Akt, we performed the ectopic expression of miR-143 in human BC 253J-BV cells, and we examined the growth inhibition and the mechanism of it in vitro and in orthotopic model mice. As a result, miR-143#12 induced a marked growth inhibition with apoptosis through impairing RAS-signaling networks, including SOS1, which exchanges guanosine diphosphate (GDP)/RAS for active guanosine triphosphate (GTP)/RAS. In the in vivo study, miR-143#12 exhibited a marked anti-tumor activity by either systemic or intravesical administration with polyionic copolymer (PIC) as the carrier, compared with the activity obtained by use of lipofection. These findings raised the possibility that the chemically modified miR-143#12 would be a candidate of microRNA (miRNA) medicine for BC delivered by intravesical infusion.
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Affiliation(s)
- Yuki Yoshikawa
- United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan.,Department of Urology, Osaka Medical College, 2-7 Daigaku-machi, Takatsuki, Osaka 569-8686, Japan
| | - Kohei Taniguchi
- Translational Research Program, Osaka Medical College, 2-7 Daigaku-machi, Takatsuki, Osaka 569-8686, Japan
| | - Takuya Tsujino
- United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan.,Department of Urology, Osaka Medical College, 2-7 Daigaku-machi, Takatsuki, Osaka 569-8686, Japan
| | - Kazuki Heishima
- United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
| | - Teruo Inamoto
- Department of Urology, Osaka Medical College, 2-7 Daigaku-machi, Takatsuki, Osaka 569-8686, Japan
| | - Tomoaki Takai
- United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan.,Department of Urology, Osaka Medical College, 2-7 Daigaku-machi, Takatsuki, Osaka 569-8686, Japan
| | - Koichiro Minami
- United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan.,Department of Urology, Osaka Medical College, 2-7 Daigaku-machi, Takatsuki, Osaka 569-8686, Japan
| | - Haruhito Azuma
- Department of Urology, Osaka Medical College, 2-7 Daigaku-machi, Takatsuki, Osaka 569-8686, Japan
| | - Kanjiro Miyata
- Department of Materials Engineering, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Kotaro Hayashi
- Inovation Center of NanoMedicine, Kawasaki Institute of Industrial Promotion, 3-25-14 Tonomachi, Kawasaki-ku, Kawasaki 210-0821, Japan
| | - Kazunori Kataoka
- Inovation Center of NanoMedicine, Kawasaki Institute of Industrial Promotion, 3-25-14 Tonomachi, Kawasaki-ku, Kawasaki 210-0821, Japan.,Policy Alternatives Research Institute, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Yukihiro Akao
- United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
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10
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Chao D, Pang L, Shi Y, Wang W, Liu K. AZD3759 induces apoptosis in hepatoma cells by activating a p53-SMAD4 positive feedback loop. Biochem Biophys Res Commun 2019; 509:535-540. [DOI: 10.1016/j.bbrc.2018.12.102] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2018] [Accepted: 12/14/2018] [Indexed: 02/07/2023]
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11
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Shi H, Zhang Y, Ji J, Xu P, Shi H, Yue X, Ren F, Chen Y, Duan Z, Chen D. Deficiency of apoptosis-stimulating protein two of p53 promotes liver regeneration in mice by activating mammalian target of rapamycin. Sci Rep 2018; 8:17927. [PMID: 30560875 PMCID: PMC6298958 DOI: 10.1038/s41598-018-36208-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Accepted: 11/09/2018] [Indexed: 12/13/2022] Open
Abstract
Although liver regeneration has been intensively studied in various ways, the mechanisms underlying liver regeneration remain elusive. Apoptosis-stimulating protein two of p53 (ASPP2) was discovered as a binding partner of p53 and plays an important role in regulating cell apoptosis and growth. However, the role of ASPP2 in hepatocyte proliferation and liver regeneration has not been reported. The expression profile of ASPP2 was measured in a mouse model with 70% partial hepatectomy (PHX). Liver regeneration and hepatocyte proliferation were detected in wild-type (ASPP2+/+) and ASPP2 haploinsufficient (ASPP2+/-) mice with PHX. The mammalian target of rapamycin (mTOR) and autophagy pathways were analyzed in the ASPP2+/+ and ASPP2+/- mice with PHX. After rapamycin or 3-methyladenine (3-MA) treatment, hepatocyte proliferation and liver regeneration were analyzed in the ASPP2+/+ and ASPP2+/- mice with PHX. ASPP2 expression was shown to be upregulated at the early stage and downregulated at the late stage. Compared to the ASPP2+/+ mice, liver regeneration was enhanced in ASPP2+/- mice with 70% PHX. In addition, compared to the ASPP2+/+ mice, the mTORC1 pathway was significantly upregulated and the autophagic pathway was downregulated in ASPP2+/-mice with 70% PHX. Inhibition of the mTORC1 pathway significantly suppressed liver regeneration in ASPP2+/- mice with 70% PHX. In contrast, disruption of the autophagic pathway further enhanced liver regeneration in ASPP2+/- mice with 70% PHX. ASPP2 deficiency can promote liver regeneration through activating the mTORC1 pathway, which further regulates downstream molecules, such as those related to autophagy and p70S6K expression in mouse model post-PHX.
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Affiliation(s)
- Hongbo Shi
- Beijing Youan Hospital, Capital Medical University, Beijing, 100069, China.
- Beijing Institute of Hepatology, Capital Medical University, Beijing, 100069, China.
- Beijing Precision Medicine and Transformation Engineering Technology Research Center of Hepatitis and Liver Center, Beijing, 100069, China.
| | - Yizhi Zhang
- Beijing Youan Hospital, Capital Medical University, Beijing, 100069, China
| | - Jing Ji
- Shanxi Provincial People's Hospital Affiliated to Shanxi Medical University, Shanxi, China
| | - Ping Xu
- Beijing Youan Hospital, Capital Medical University, Beijing, 100069, China
- Beijing Institute of Hepatology, Capital Medical University, Beijing, 100069, China
- Beijing Precision Medicine and Transformation Engineering Technology Research Center of Hepatitis and Liver Center, Beijing, 100069, China
| | - Honglin Shi
- Beijing Youan Hospital, Capital Medical University, Beijing, 100069, China
- Beijing Institute of Hepatology, Capital Medical University, Beijing, 100069, China
- Beijing Precision Medicine and Transformation Engineering Technology Research Center of Hepatitis and Liver Center, Beijing, 100069, China
| | - Xiujuan Yue
- Beijing Youan Hospital, Capital Medical University, Beijing, 100069, China
- Beijing Institute of Hepatology, Capital Medical University, Beijing, 100069, China
- Beijing Precision Medicine and Transformation Engineering Technology Research Center of Hepatitis and Liver Center, Beijing, 100069, China
| | - Feng Ren
- Beijing Youan Hospital, Capital Medical University, Beijing, 100069, China
- Beijing Institute of Hepatology, Capital Medical University, Beijing, 100069, China
- Beijing Precision Medicine and Transformation Engineering Technology Research Center of Hepatitis and Liver Center, Beijing, 100069, China
| | - Yu Chen
- Beijing Youan Hospital, Capital Medical University, Beijing, 100069, China
| | - Zhongping Duan
- Beijing Youan Hospital, Capital Medical University, Beijing, 100069, China
- Beijing Institute of Hepatology, Capital Medical University, Beijing, 100069, China
| | - Dexi Chen
- Beijing Youan Hospital, Capital Medical University, Beijing, 100069, China.
- Beijing Institute of Hepatology, Capital Medical University, Beijing, 100069, China.
- Beijing Precision Medicine and Transformation Engineering Technology Research Center of Hepatitis and Liver Center, Beijing, 100069, China.
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12
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Chen YX, Guo Y, Dong SS, Chen XF, Chen JB, Zhang YJ, Yao S, Thynn HN, Zhi L, Yang TL. Runs of homozygosity associate with decreased risks of lung cancer in never-smoking East Asian females. J Cancer 2018; 9:3858-3866. [PMID: 30410588 PMCID: PMC6218761 DOI: 10.7150/jca.22855] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Accepted: 02/24/2018] [Indexed: 12/14/2022] Open
Abstract
Although genome-wide association studies (GWASs) have identified some risk single-nucleotide polymorphisms in East Asian never-smoking females, the unexplained missing heritability is still required to be investigated. Runs of homozygosity (ROHs) are thought to be a type of genetic variation acting on human complex traits and diseases. We detected ROHs in 8,881 East Asian never-smoking women. The summed ROHs were used to fit a logistic regression model which noteworthily revealed a significant association between ROHs and the decreased risk of lung cancer (P < 0.05). We identified 4 common ROHs regions located at 2p22.1, which were significantly associated with decreased risk of lung cancer (P = 2.00 × 10-4 - 1.35 × 10-4). Functional annotation was conducted to investigate the regulatory function of ROHs. The common ROHs were overlapped with potential regulatory elements, such as active epigenome elements and chromatin states in lung-derived cell lines. SOS1 and ARHGEF33 were significantly up-regulated as the putative target genes of the identified ROHs in lung cancer samples according to the analysis of differently expressed genes. Our results suggest that ROHs could act as recessive contributing factors and regulatory elements to influence the risk of lung cancer in never-smoking East Asian females.
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Affiliation(s)
- Yi-Xiao Chen
- Department of Joint Surgery, Honghui Hospital; The Key Laboratory of Biomedical Information Engineering of Ministry of Education, Xi'an Jiaotong University, Xi'an, P. R. China.,Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi Province, 710049, P. R. China
| | - Yan Guo
- Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi Province, 710049, P. R. China
| | - Shan-Shan Dong
- Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi Province, 710049, P. R. China
| | - Xiao-Feng Chen
- Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi Province, 710049, P. R. China
| | - Jia-Bin Chen
- Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi Province, 710049, P. R. China
| | - Yu-Jie Zhang
- Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi Province, 710049, P. R. China
| | - Shi Yao
- Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi Province, 710049, P. R. China
| | - Hlaing Nwe Thynn
- Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi Province, 710049, P. R. China
| | - Liqiang Zhi
- Department of Joint Surgery, Honghui Hospital; The Key Laboratory of Biomedical Information Engineering of Ministry of Education, Xi'an Jiaotong University, Xi'an, P. R. China
| | - Tie-Lin Yang
- Department of Joint Surgery, Honghui Hospital; The Key Laboratory of Biomedical Information Engineering of Ministry of Education, Xi'an Jiaotong University, Xi'an, P. R. China.,Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi Province, 710049, P. R. China
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13
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Artini PG, Tatone C, Sperduti S, D'Aurora M, Franchi S, Di Emidio G, Ciriminna R, Vento M, Di Pietro C, Stuppia L, Gatta V. Cumulus cells surrounding oocytes with high developmental competence exhibit down-regulation of phosphoinositol 1,3 kinase/protein kinase B (PI3K/AKT) signalling genes involved in proliferation and survival. Hum Reprod 2018; 32:2474-2484. [PMID: 29087515 PMCID: PMC5850344 DOI: 10.1093/humrep/dex320] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2017] [Accepted: 10/02/2017] [Indexed: 12/13/2022] Open
Abstract
STUDY QUESTION Is the phosphoinositol 1,3-kinase/protein kinase B (PI3K/AKT) pathway expression profile in cumulus cells (CCs) a potential marker of oocyte competence and predictive of pregnancy outcome? SUMMARY ANSWER Eleven genes (AKT1, ARHGEF7, BCL2L1, CCND1, E2F1, HRAS, KCNH2, PIK3C2A, SHC1, SOS1 and SPP1) in the PI3K/AKT pathway were significantly down-regulated in CCs from oocytes that went on to produce a pregnancy compared to CCs associated with a negative outcome. WHAT IS KNOWN ALREADY The PI3K/AKT pathway plays a pivotal role in the interdependence and continuous feedback between the oocyte and CCs. STUDY DESIGN SIZE, DURATION The expression analysis of 92 transcripts in the PI3K/AKT pathway in CCs from patients with negative or positive pregnancy outcome, after single embryo transfer, was performed. Mouse CCs target gene expression was conducted to associate the expression profile of PI3K/AKT pathway to oocyte developmental profile. PARTICIPANTS/MATERIALS, SETTING, METHODS Fifty-five good prognosis IVF patients who had been referred to IVF or intracytoplasmic sperm injection treatment for male-factor infertility or tubal disease were enroled. CCs from single cumulus-oocyte complexes (COCs) from 16 patients who underwent a single embryo transfer were analyzed. Twenty-five CD-1 mice were used to assess gene expression in CCs associated with oocytes with different competence in relation to hCG priming. A total 220 human COCs were collected. The RNA extracted from CCs of 16 selected patients was used to analyze PI3K/AKT pathway gene expression employing a 96-well custom TaqMan Array. Expression data of CCs associated to positive IVF outcome were compared to data from negative outcome samples. Mice were sacrificed after 9, 12, 15, 21 and 24 h post-hCG administration to obtain CCs from MII oocytes with different developmental competence. Akt1, Bcl2l2 and Shc1 expression were tested in the collected mouse CCs. In addition, the expression of upstream regulator ESR1, the gene encoding for the oestrogen receptor ERβ, and the downstream effectors of the pathway FOXO1, FOXO3 and FOXO4 was evaluated in human and mouse samples. MAIN RESULTS AND THE ROLE OF CHANCE Transcripts involved in the PI3K Signaling Pathway were selectively modulated according to the IVF/ICSI outcome of the oocyte. Eleven transcripts in this pathway were significantly down-regulated in all samples of CCs from oocytes with positive when compared those with a negative outcome. These outcomes were confirmed in mouse CCs associated with oocytes at different maturation stages. Expression data revealed that the down-regulation of ESR1 could be related to oocyte competence and is likely to be the driver of expression changes highlighted in the PI3K/AKT pathway. LIMITATIONS REASONS FOR CAUTION Small sample size and retrospective design. WIDER IMPLICATIONS OF THE FINDINGS The CCs expression profile of PI3K/AKT signaling genes, disclosed a specific CCs gene signature related to oocyte competence. It could be speculated that CCs associated with competent oocytes have completed their role in sustaining oocyte development and are influencing their fate in response to metabolic and hormonal changes by de-activating anti-apoptotic signals. STUDY FUNDING/COMPETING INTEREST(S) Supported by Merck Serono an affiliate of Merck KGaA, Darmstadt, Germany (research grant for the laboratory session; Merck KGaA reviewed the manuscript for medical accuracy only before journal submission. The authors are fully responsible for the content of this manuscript, and the views and opinions described in the publication reflect solely those of the authors). The authors declare no conflict of interest.
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Affiliation(s)
- P G Artini
- Department of Clinical and Experimental Medicine, Division of Obstetrics and Gynecology Oncology, University of Pisa, Via Savi 10, 56126 Pisa, Italy
| | - C Tatone
- Department of Life, Health and Environmental Sciences, University of L'Aquila, Piazzale Salvatore Tommasi 1, 67100 L'Aquila, Italy
| | - S Sperduti
- Functional Genetics Unit, Center of Excellence on Aging (Ce.S.I.-Met), Via Dei Vestini 31, 66100 Chieti, Italy
| | - M D'Aurora
- Functional Genetics Unit, Center of Excellence on Aging (Ce.S.I.-Met), Via Dei Vestini 31, 66100 Chieti, Italy.,Department of Psychological, Health and Territorial Sciences, School of Medicine and Health Sciences, 'G.d'Annunzio' University, Via Dei Vestini 31, 66100 Chieti, Italy
| | - S Franchi
- Functional Genetics Unit, Center of Excellence on Aging (Ce.S.I.-Met), Via Dei Vestini 31, 66100 Chieti, Italy.,Department of Psychological, Health and Territorial Sciences, School of Medicine and Health Sciences, 'G.d'Annunzio' University, Via Dei Vestini 31, 66100 Chieti, Italy
| | - G Di Emidio
- Department of Life, Health and Environmental Sciences, University of L'Aquila, Piazzale Salvatore Tommasi 1, 67100 L'Aquila, Italy
| | - R Ciriminna
- AMBRA-Associazione Medici e Biologi per la Riproduzione Assistita, Palermo, Italy
| | - M Vento
- IVF Unit, Cannizzaro Hospital, Catania, Italy
| | - C Di Pietro
- Department of Biomedical Sciences and Biotechnolgy, Section of Biology and Genetics G. Sichel, University of Catania, Via S.Sofia, 87, 95123 Catania, Italy
| | - L Stuppia
- Functional Genetics Unit, Center of Excellence on Aging (Ce.S.I.-Met), Via Dei Vestini 31, 66100 Chieti, Italy.,Department of Psychological, Health and Territorial Sciences, School of Medicine and Health Sciences, 'G.d'Annunzio' University, Via Dei Vestini 31, 66100 Chieti, Italy
| | - V Gatta
- Functional Genetics Unit, Center of Excellence on Aging (Ce.S.I.-Met), Via Dei Vestini 31, 66100 Chieti, Italy.,Department of Psychological, Health and Territorial Sciences, School of Medicine and Health Sciences, 'G.d'Annunzio' University, Via Dei Vestini 31, 66100 Chieti, Italy
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14
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Incomplete radiofrequency ablation promotes the development of CD133 + cancer stem cells in hepatocellular carcinoma cell line HepG2 via inducing SOX9 expression. Hepatobiliary Pancreat Dis Int 2018; 17:416-422. [PMID: 30262419 DOI: 10.1016/j.hbpd.2018.09.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Accepted: 08/28/2018] [Indexed: 02/07/2023]
Abstract
BACKGROUND Cancer stem cells (CSCs) accelerate the growth of hepatocellular carcinoma (HCC) residual after incomplete radiofrequency ablation (In-RFA). The present study aimed to detect the effects of In-RFA on stemness transcription factors (STFs) expression which are important for the production and function of CSCs, and to find which STFs promote HCC stemness after In-RFA. METHODS HepG2 cells were used for in vitro and in vivo studies. Flow cytometry and sphere-formation assays were used to detect the level and function of CD133+CSCs in the models. PCR array and ELISA were applied to analyze the altered expression of 84 STFs in CD133+CSCs in two models. Specific lentiviral shRNA was used to knockdown STFs expression, followed by detecting In-RFA's effects on the levels and function of CD133+CSCs. RESULTS In-RFA was identified to induce CD133+CSCs and increase their tumorigenesis ability in vitro and in vivo. The mRNA levels of 84 STFs in CD133+CSCs were detected by PCR array, showing that 15 and 22 STFs were up-regulated in two models, respectively. Meanwhile, the mRNA levels of seven common STFs were up-regulated in both models. ELISA assay demonstrated that only the protein of sex determining region Y-box 9 (SOX9) was up-regulated in both models, the protein levels of the other 6 common STFs did not increase in both models. Finally, SOX9 was identified to play an important role in inducing, maintaining stemness and promoting tumorigenesis ability of CD133+CSCs in both models. CONCLUSION In-RFA-induced SOX9 stimulates CD133+CSCs proliferation and increases their tumorigenesis ability, suggesting that SOX9 may be a good target for HCC treatment.
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15
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Pang L, Liu K. Tumor-suppressing effects of autophagy on hepatocellular carcinoma. LIVER RESEARCH 2018. [DOI: 10.1016/j.livres.2018.08.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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16
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Gandhi D, Sivanesan S, Kannan K. Manganese-Induced Neurotoxicity and Alterations in Gene Expression in Human Neuroblastoma SH-SY5Y Cells. Biol Trace Elem Res 2018; 183:245-253. [PMID: 28914406 DOI: 10.1007/s12011-017-1153-5] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Accepted: 09/06/2017] [Indexed: 12/13/2022]
Abstract
Manganese (Mn) is an essential trace element required for many physiological functions including proper biochemical and cellular functioning of the central nervous system (CNS). However, exposure to excess level of Mn through occupational settings or from environmental sources has been associated with neurotoxicity. The cellular and molecular mechanism of Mn-induced neurotoxicity remains unclear. In the current study, we investigated the effects of 30-day exposure to a sub-lethal concentration of Mn (100 μM) in human neuroblastoma cells (SH-SY5Y) using transcriptomic approach. Microarray analysis revealed differential expression of 1057 transcripts in Mn-exposed SH-SY5Y cells as compared to control cells. Gene functional annotation cluster analysis exhibited that the differentially expressed genes were associated with several biological pathways. Specifically, genes involved in neuronal pathways including neuron differentiation and development, regulation of neurogenesis, synaptic transmission, and neuronal cell death (apoptosis) were found to be significantly altered. KEGG pathway analysis showed upregulation of p53 signaling pathways and neuroactive ligand-receptor interaction pathways, and downregulation of neurotrophin signaling pathway. On the basis of the gene expression profile, possible molecular mechanisms underlying Mn-induced neuronal toxicity were predicted.
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Affiliation(s)
- Deepa Gandhi
- Environmental Impact and Sustainability Division, CSIR-National Environmental Engineering Research Institute (NEERI), Nagpur, India
| | - Saravanadevi Sivanesan
- Environmental Impact and Sustainability Division, CSIR-National Environmental Engineering Research Institute (NEERI), Nagpur, India.
| | - Krishnamurthi Kannan
- Environmental Impact and Sustainability Division, CSIR-National Environmental Engineering Research Institute (NEERI), Nagpur, India
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17
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Liu D, Li R, Guo X, Pang L, Zang Y, Liu K, Chen D. DNA damage regulated autophagy modulator 1 recovers the function of apoptosis-stimulating of p53 protein 2 on inducing apoptotic cell death in Huh7.5 cells. Oncol Lett 2018; 15:9333-9338. [PMID: 29844830 DOI: 10.3892/ol.2018.8453] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2016] [Accepted: 03/02/2018] [Indexed: 12/18/2022] Open
Abstract
Overexpression of apoptosis-stimulating of p53 protein 2 (ASPP2) can induce apoptotic cell death in hepatoma cells, which contributes to a killing effect of ASPP2 on treating hepatocellular carcinoma (HCC). In the present study, ASPP2 overexpression failed to induce apoptotic cell death in the HCC Huh7.5 cell line, but promoted autophagy development by inhibiting AKT/mTOR pathway. Inhibition of autophagy using 3-methyladenosine recovered the function of ASPP2 on inducing apoptotic cell death, indicating that ASPP2-induced autophagy has an anti-apoptotic role in Huh7.5 cells. A previous study demonstrated that ASPP2-induced autophagy could induce apoptosis in a CHOP- and DRAM-dependent manner, in which CHOP is involved in the initiation of autophagy and DRAM allows autophagy to induce apoptosis. In the present study, CHOP and DRAM were not involved in ASPP2-induced autophagy; however, the induction of DRAM overexpression recovered the apoptosis-inducing function of ASPP2, indicating that DRAM overexpression switches the role of ASPP2-induced autophagy from anti-apoptotic to pro-apoptotic in Huh7.5 cells. Thus, in combination with DRAM, ASPP2 may better perform its pro-apoptotic role by preventing the occurrence of anti-apoptotic autophagy.
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Affiliation(s)
- Dongjie Liu
- Capital Medical University Affiliated to Beijing You An Hospital, Beijing 100069, P.R. China.,Beijing Institute of Hepatology, Beijing 100069, P.R. China
| | - Rui Li
- Department of Acupuncture and Mini-invasive Oncology, Beijing University of Chinese Medicine Third Affiliated Hospital, Beijing 100029, P.R. China
| | - Xianghua Guo
- Capital Medical University Affiliated to Beijing You An Hospital, Beijing 100069, P.R. China.,Beijing Institute of Hepatology, Beijing 100069, P.R. China
| | - Lijun Pang
- Capital Medical University Affiliated to Beijing You An Hospital, Beijing 100069, P.R. China.,Beijing Institute of Hepatology, Beijing 100069, P.R. China
| | - Yunjin Zang
- Capital Medical University Affiliated to Beijing You An Hospital, Beijing 100069, P.R. China.,Organ Transplantation Center, The Affiliated Hospital of Qingdao University, Qingdao, Shandong 266003, P.R. China
| | - Kai Liu
- Capital Medical University Affiliated to Beijing You An Hospital, Beijing 100069, P.R. China.,Beijing Institute of Hepatology, Beijing 100069, P.R. China
| | - Dexi Chen
- Capital Medical University Affiliated to Beijing You An Hospital, Beijing 100069, P.R. China.,Beijing Institute of Hepatology, Beijing 100069, P.R. China.,Organ Transplantation Center, The Affiliated Hospital of Qingdao University, Qingdao, Shandong 266003, P.R. China
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18
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Wu T, Song H, Xie D, Zhao B, Xu H, Wu C, Hua K, Deng Y, Ji C, Hu J, Fang L. Silencing of ASPP2 promotes the proliferation, migration and invasion of triple-negative breast cancer cells via the PI3K/AKT pathway. Int J Oncol 2018; 52:2001-2010. [PMID: 29568874 DOI: 10.3892/ijo.2018.4331] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Accepted: 03/08/2018] [Indexed: 11/06/2022] Open
Abstract
Apoptosis-stimulating p53 protein 2 (ASPP2) is an apoptosis inducer that acts via binding with p53 and then enhancing the transcriptional activities toward pro‑apoptosis genes. ASPP2 has recently been reported to serve a major role in p53‑independent pathways. Triple‑negative breast cancer (TNBC) is a type of breast cancer that is more aggressive and highly lethal when p53 is mutated. In the present study, the mRNA level of ASPP2 was found to be suppressed in breast tumors compared with that in adjacent normal breast tissues, and the expression of ASPP2 was also decreased in a series of breast cancer cell lines compared with that in MCF‑10A normal breast cells. Downregulation of ASPP2 by specific small interfering RNA (siRNA) transfection was able to promote cell growth, reduce cell apoptosis, and contribute to cell migration and invasion. Furthermore, downregulation of ASPP2 promoted cell epithelial‑mesenchymal transition (EMT) in MDA‑MB‑231 and HCC‑1937 TNBC cells. Furthermore, it was found that when ASPP2 siRNA was transfected into MDA‑MB‑231 and HCC‑1937 cells, the expression of phosphoinositide‑3‑kinase regulatory subunit 1 (p85α) decreased and phosphorylation of protein kinase B (AKT) increased, which are key molecular regulators in the phosphatidylinositol 3-kinase (PI3K)/AKT pathway. In conclusion, the present data indicated that ASPP2 had a crucial influence on the proliferation and metastasis in TNBC, and that the functional mechanism may be p53‑independent to a great extent. ASPP2 and its link with the PI3K/AKT pathway deserve further investigation and may provide novel insights into therapeutic targets for TNBC.
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Affiliation(s)
- Tianqi Wu
- Department of Breast and Thyroid Surgery, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, P.R. China
| | - Hongming Song
- Department of Breast and Thyroid Surgery, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, P.R. China
| | - Dan Xie
- Department of Breast and Thyroid Surgery, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, P.R. China
| | - Bingkun Zhao
- Department of Breast and Thyroid Surgery, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, P.R. China
| | - Hui Xu
- Department of Breast and Thyroid Surgery, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, P.R. China
| | - Chenyang Wu
- Department of Breast and Thyroid Surgery, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, P.R. China
| | - Kaiyao Hua
- Department of Breast and Thyroid Surgery, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, P.R. China
| | - Yijun Deng
- Department of Breast and Thyroid Surgery, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, P.R. China
| | - Changle Ji
- Department of Breast and Thyroid Surgery, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, P.R. China
| | - Jiashu Hu
- Department of Breast and Thyroid Surgery, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, P.R. China
| | - Lin Fang
- Department of Breast and Thyroid Surgery, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, P.R. China
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Liu K, Lee J, Kim JY, Wang L, Tian Y, Chan ST, Cho C, Machida K, Chen D, Ou JHJ. Mitophagy Controls the Activities of Tumor Suppressor p53 to Regulate Hepatic Cancer Stem Cells. Mol Cell 2017; 68:281-292.e5. [PMID: 29033320 PMCID: PMC5687282 DOI: 10.1016/j.molcel.2017.09.022] [Citation(s) in RCA: 173] [Impact Index Per Article: 24.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Revised: 08/03/2017] [Accepted: 09/15/2017] [Indexed: 12/25/2022]
Abstract
Autophagy is required for benign hepatic tumors to progress into malignant hepatocellular carcinoma. However, the mechanism is unclear. Here, we report that mitophagy, the selective removal of mitochondria by autophagy, positively regulates hepatic cancer stem cells (CSCs) by suppressing the tumor suppressor p53. When mitophagy is enhanced, p53 co-localizes with mitochondria and is removed by a mitophagy-dependent manner. However, when mitophagy is inhibited, p53 is phosphorylated at serine-392 by PINK1, a kinase associated with mitophagy, on mitochondria and translocated into the nucleus, where it binds to the NANOG promoter to prevent OCT4 and SOX2 transcription factors from activating the expression of NANOG, a transcription factor critical for maintaining the stemness and the self-renewal ability of CSCs, resulting in the reduction of hepatic CSC populations. These results demonstrate that mitophagy controls the activities of p53 to maintain hepatic CSCs and provide an explanation as to why autophagy is required to promote hepatocarcinogenesis.
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Affiliation(s)
- Kai Liu
- Department of Molecular Microbiology and Immunology, University of Southern California Keck School of Medicine, Los Angeles, CA 90033, USA; Beijing You'an Hospital, Capital Medical University, Beijing 100069, China; Beijing Institute of Hepatology, Beijing 100069, China
| | - Jiyoung Lee
- Department of Molecular Microbiology and Immunology, University of Southern California Keck School of Medicine, Los Angeles, CA 90033, USA
| | - Ja Yeon Kim
- Department of Molecular Microbiology and Immunology, University of Southern California Keck School of Medicine, Los Angeles, CA 90033, USA
| | - Linya Wang
- Department of Molecular Microbiology and Immunology, University of Southern California Keck School of Medicine, Los Angeles, CA 90033, USA
| | - Yongjun Tian
- Department of Molecular Microbiology and Immunology, University of Southern California Keck School of Medicine, Los Angeles, CA 90033, USA
| | - Stephanie T Chan
- Department of Molecular Microbiology and Immunology, University of Southern California Keck School of Medicine, Los Angeles, CA 90033, USA
| | - Cecilia Cho
- Department of Molecular Microbiology and Immunology, University of Southern California Keck School of Medicine, Los Angeles, CA 90033, USA
| | - Keigo Machida
- Department of Molecular Microbiology and Immunology, University of Southern California Keck School of Medicine, Los Angeles, CA 90033, USA
| | - Dexi Chen
- Beijing You'an Hospital, Capital Medical University, Beijing 100069, China; Beijing Institute of Hepatology, Beijing 100069, China
| | - Jing-Hsiung James Ou
- Department of Molecular Microbiology and Immunology, University of Southern California Keck School of Medicine, Los Angeles, CA 90033, USA.
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20
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Zang Y, Shi Y, Liu K, Qiao L, Guo X, Chen D. Δ40p53 is involved in the inactivation of autophagy and contributes to inhibition of cell death in HCT116-Δ40p53 cells. Oncotarget 2017; 8:12754-12763. [PMID: 28061446 PMCID: PMC5355051 DOI: 10.18632/oncotarget.14460] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2016] [Accepted: 12/12/2016] [Indexed: 12/02/2022] Open
Abstract
Δ40p53 is an isoform of wild-type p53 (wtp53). Here, we assessed whether Δ40p53 has the same functions as wild-type p53 in the regulation of cell death and autophagy. First, we used HCT116 (p53+/+) and H1299 (p53-free) cells to produce two cell lines (HCT116-Δ40p53 and H1299-Δ40p53) that express exogenous Δ40p53 but not wtp53. By using these cell lines, we determined that Δ40p53 inhibited starvation-induced autophagy, as does wtp53. This inhibition arises from both Δ40p53 and wtp53 having 3′-5′ exonuclease activity, which reduces the levels of double-stranded RNA (dsRNA) and then inhibits PKR/eIF2α-induced autophagy in cells exposed to starvation. Like wtp53, the translocation of Δ40p53 to the nucleus increased in cells in response to Methyl methane sulfonate (MMS) treatment-induced DNA damage. Previous studies have shown that nuclear wtp53 can induce DRAM expression and DRAM-induced autophagy in cells in response to DNA damage, thereby contributing to apoptotic cell death as DRAM-induced autophagy is a pro-apoptotic factor. Here, nuclear Δ40p53 did not individually induce DRAM-induced autophagy and cell death in response to DNA damage. However, nuclear Δ40p53 inhibited wtp53-induced DRAM expression and cell death. Thus, Δ40p53 and wtp53 have 3′-5′ exonuclease activity and inhibit starvation-induced autophagy in the cytoplasm; however, nuclear Δ40p53 inhibits wtp53-induced cell death by impairing the transactivation activity of wtp53. Because wtp53 inhibits tumor and viral infection by inhibiting autophagy and promoting degradation of viral dsRNA, it is reasonable to believe that Δ40p53 has the similar functions. A deeper study of these functions of Δ40p53 is needed in the future.
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Affiliation(s)
- Yunjin Zang
- Capital Medical University affiliated Beijing You An Hospital, Beijing 100069, China.,Organ Transplantation Center, The Affiliated Hospital of Qingdao University, Shandong Province, 266003, China
| | - Ying Shi
- Beijing Institute of Hepatology, Beijing 100069, China.,Capital Medical University affiliated Beijing You An Hospital, Beijing 100069, China
| | - Kai Liu
- Beijing Institute of Hepatology, Beijing 100069, China.,Capital Medical University affiliated Beijing You An Hospital, Beijing 100069, China
| | - Luxin Qiao
- Beijing Institute of Hepatology, Beijing 100069, China.,Capital Medical University affiliated Beijing You An Hospital, Beijing 100069, China
| | - Xianghua Guo
- Beijing Institute of Hepatology, Beijing 100069, China.,Capital Medical University affiliated Beijing You An Hospital, Beijing 100069, China
| | - Dexi Chen
- Beijing Institute of Hepatology, Beijing 100069, China.,Capital Medical University affiliated Beijing You An Hospital, Beijing 100069, China.,Organ Transplantation Center, The Affiliated Hospital of Qingdao University, Shandong Province, 266003, China
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21
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Burgermeister E, Höde P, Betge J, Gutting T, Merkel A, Wu W, Tänzer M, Mossner M, Nowak D, Magdeburg J, Rückert F, Sticht C, Breitkopf-Heinlein K, Schulte N, Härtel N, Belle S, Post S, Gaiser T, Heppner BI, Behrens HM, Röcken C, Ebert MPA. Epigenetic silencing of tumor suppressor candidate 3 confers adverse prognosis in early colorectal cancer. Oncotarget 2017; 8:84714-84728. [PMID: 29156678 PMCID: PMC5689568 DOI: 10.18632/oncotarget.20950] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Accepted: 08/23/2017] [Indexed: 01/22/2023] Open
Abstract
Colorectal cancer (CRC) is a biologically and clinically heterogeneous disease. Even though many recurrent genomic alterations have been identified that may characterize distinct subgroups, their biological impact and clinical significance as prognostic indicators remain to be defined. The tumor suppressor candidate-3 (TUSC3/N33) locates to a genomic region frequently deleted or silenced in cancers. TUSC3 is a subunit of the oligosaccharyltransferase (OST) complex at the endoplasmic reticulum (ER) which catalyzes bulk N-glycosylation of membrane and secretory proteins. However, the consequences of TUSC3 loss are largely unknown. Thus, the aim of the study was to characterize the functional and clinical relevance of TUSC3 expression in CRC patients' tissues (n=306 cases) and cell lines. TUSC3 mRNA expression was silenced by promoter methylation in 85 % of benign adenomas (n=46 cases) and 35 % of CRCs (n =74 cases). Epidermal growth factor receptor (EGFR) was selected as one exemplary ER-derived target protein of TUSC3-mediated posttranslational modification. We found that TUSC3 inhibited EGFR-signaling and promoted apoptosis in human CRC cells, whereas TUSC3 siRNA knock-down increased EGFR-signaling. Accordingly, in stage I/II node negative CRC patients (n=156 cases) loss of TUSC3 protein expression was associated with poor overall survival. In sum, our data suggested that epigenetic silencing of TUSC3 may be useful as a molecular marker for progression of early CRC.
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Affiliation(s)
- Elke Burgermeister
- Department of Medicine II, University Hospital Mannheim, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Patrick Höde
- Department of Medicine II, University Hospital Mannheim, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Johannes Betge
- Department of Medicine II, University Hospital Mannheim, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Tobias Gutting
- Department of Medicine II, University Hospital Mannheim, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Andreas Merkel
- Department of Medicine II, University Hospital Mannheim, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Wen Wu
- Department of Medicine II, University Hospital Mannheim, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Marc Tänzer
- Department of Medicine II, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Maximilian Mossner
- Department of Medicine III, University Hospital Mannheim, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Daniel Nowak
- Department of Medicine III, University Hospital Mannheim, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Julia Magdeburg
- Department of Surgery, University Hospital Mannheim, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Felix Rückert
- Department of Surgery, University Hospital Mannheim, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Carsten Sticht
- Center for Medical Research (ZMF), Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Katja Breitkopf-Heinlein
- Department of Medicine II, University Hospital Mannheim, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Nadine Schulte
- Department of Medicine II, University Hospital Mannheim, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Nicolai Härtel
- Department of Medicine II, University Hospital Mannheim, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Sebastian Belle
- Department of Medicine II, University Hospital Mannheim, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Stefan Post
- Department of Surgery, University Hospital Mannheim, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Timo Gaiser
- Institute of Pathology, University Hospital Mannheim, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | | | | | - Christoph Röcken
- Institute of Pathology, Christian-Albrechts University, Kiel, Germany
| | - Matthias P A Ebert
- Department of Medicine II, University Hospital Mannheim, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
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22
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Ijiri M, Fujiya M, Konishi H, Tanaka H, Ueno N, Kashima S, Moriichi K, Sasajima J, Ikuta K, Okumura T. Ferrichrome identified from Lactobacillus casei ATCC334 induces apoptosis through its iron-binding site in gastric cancer cells. Tumour Biol 2017. [PMID: 28639907 DOI: 10.1177/1010428317711311] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Ferrichrome is known to be a siderophore, but it was recently identified as a tumor-suppressive molecule derived from Lactobacillus casei ATCC334 ( L. casei). In the present study, we investigated the effects of ferrichrome in gastric cancer cells. Cell lines and xenograft models treated with ferrichrome demonstrated growth suppression. The expression levels of cleaved poly (adenosine diphosphate-ribose) polymerase, and cleaved caspase-9 were increased by ferrichrome treatment. Although the tumor-suppressive effects of ferrichrome were almost completely diminished by the iron chelation, the reduction in the intracellular iron by ferrichrome did not correlate with its tumor-suppressive effects. An exhaustive docking simulation indicated that iron-free ferrichrome can make stable conformations with various mammalian molecules, including transporters and receptors. In conclusion, probiotic-derived ferrichrome induced apoptosis in gastric cancer cells. The iron binding site of ferrichrome is the structure responsible for its tumor suppressive function.
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Affiliation(s)
- Masami Ijiri
- 1 Division of Gastroenterology and Hematology/Oncology, Department of Medicine, Asahikawa Medical University, Asahikawa, Japan
| | - Mikihiro Fujiya
- 1 Division of Gastroenterology and Hematology/Oncology, Department of Medicine, Asahikawa Medical University, Asahikawa, Japan
| | - Hiroaki Konishi
- 1 Division of Gastroenterology and Hematology/Oncology, Department of Medicine, Asahikawa Medical University, Asahikawa, Japan
| | - Hiroki Tanaka
- 2 Department of Legal Medicine, Asahikawa Medical University, Asahikawa, Japan
| | - Nobuhiro Ueno
- 1 Division of Gastroenterology and Hematology/Oncology, Department of Medicine, Asahikawa Medical University, Asahikawa, Japan
| | - Shin Kashima
- 1 Division of Gastroenterology and Hematology/Oncology, Department of Medicine, Asahikawa Medical University, Asahikawa, Japan
| | - Kentaro Moriichi
- 1 Division of Gastroenterology and Hematology/Oncology, Department of Medicine, Asahikawa Medical University, Asahikawa, Japan
| | - Junpei Sasajima
- 1 Division of Gastroenterology and Hematology/Oncology, Department of Medicine, Asahikawa Medical University, Asahikawa, Japan
| | - Katsuya Ikuta
- 1 Division of Gastroenterology and Hematology/Oncology, Department of Medicine, Asahikawa Medical University, Asahikawa, Japan
| | - Toshikatsu Okumura
- 1 Division of Gastroenterology and Hematology/Oncology, Department of Medicine, Asahikawa Medical University, Asahikawa, Japan
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23
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Liu K, Lin D, Ouyang Y, Pang L, Guo X, Wang S, Zang Y, Chen D. Amphiregulin impairs apoptosis-stimulating protein 2 of p53 overexpression-induced apoptosis in hepatoma cells. Tumour Biol 2017; 39:1010428317695026. [PMID: 28351301 DOI: 10.1177/1010428317695026] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Overexpression of apoptosis-stimulating protein 2 of p53 (ASPP2) induces apoptotic cell death in hepatoma cells (e.g. HepG2 cells) by enhancing the transactivation activity of p53, but long-term ASPP2 overexpression fails to induce more apoptosis since activation of the epidermal growth factor/epidermal growth factor receptor/SOS1 pathway impairs the pro-apoptotic role of ASPP2. In this study, in recombinant adenovirus-ASPP2-infected HepG2 cells, ASPP2 overexpression induces amphiregulin expression in a p53-dependent manner. Although amphiregulin initially contributes to ASPP2-induced apoptosis, it eventually impairs the pro-apoptotic function of ASPP2 by activating the epidermal growth factor/epidermal growth factor receptor/SOS1 pathway, leading to apoptosis resistance. Moreover, blocking soluble amphiregulin with a neutralizing antibody also significantly increased apoptotic cell death of HepG2 cells due to treatment with methyl methanesulfonate, cisplatin, or a recombinant p53 adenovirus, suggesting that the function of amphiregulin involved in inhibiting apoptosis may be a common mechanism by which hepatoma cells escape from stimulus-induced apoptosis. Thus, our data elucidate an apoptosis-evasion mechanism in hepatocellular carcinoma and have potential implications for hepatocellular carcinoma therapy.
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Affiliation(s)
- Kai Liu
- 1 Beijing Institute of Hepatology, Capital Medical University affiliated Beijing You An Hospital, Beijing, P.R. China.,2 Capital Medical University affiliated Beijing You An Hospital, Beijing, P.R. China
| | - Dongdong Lin
- 2 Capital Medical University affiliated Beijing You An Hospital, Beijing, P.R. China
| | - Yabo Ouyang
- 1 Beijing Institute of Hepatology, Capital Medical University affiliated Beijing You An Hospital, Beijing, P.R. China.,2 Capital Medical University affiliated Beijing You An Hospital, Beijing, P.R. China
| | - Lijun Pang
- 1 Beijing Institute of Hepatology, Capital Medical University affiliated Beijing You An Hospital, Beijing, P.R. China.,2 Capital Medical University affiliated Beijing You An Hospital, Beijing, P.R. China
| | - Xianghua Guo
- 1 Beijing Institute of Hepatology, Capital Medical University affiliated Beijing You An Hospital, Beijing, P.R. China.,2 Capital Medical University affiliated Beijing You An Hospital, Beijing, P.R. China
| | - Shanshan Wang
- 1 Beijing Institute of Hepatology, Capital Medical University affiliated Beijing You An Hospital, Beijing, P.R. China.,2 Capital Medical University affiliated Beijing You An Hospital, Beijing, P.R. China
| | - Yunjin Zang
- 2 Capital Medical University affiliated Beijing You An Hospital, Beijing, P.R. China.,3 Organ Transplantation Center, The Affiliated Hospital of Qingdao University, Qingdao, P.R. China
| | - Dexi Chen
- 1 Beijing Institute of Hepatology, Capital Medical University affiliated Beijing You An Hospital, Beijing, P.R. China.,2 Capital Medical University affiliated Beijing You An Hospital, Beijing, P.R. China.,3 Organ Transplantation Center, The Affiliated Hospital of Qingdao University, Qingdao, P.R. China
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24
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Liu K, Hao M, Ouyang Y, Zheng J, Chen D. CD133 + cancer stem cells promoted by VEGF accelerate the recurrence of hepatocellular carcinoma. Sci Rep 2017; 7:41499. [PMID: 28134312 PMCID: PMC5278354 DOI: 10.1038/srep41499] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Accepted: 12/21/2016] [Indexed: 12/12/2022] Open
Abstract
The role of cancer stem cells (CSCs) in inducing the recurrence of hepatocellular carcinoma (HCC) after radiofrequency ablation (RFA) remains unclear. Here, we found that a dramatic increase in plasma vascular endothelial growth factor (VEGF) and an induction of local CD133+ CSCs are associated with early HCC recurrence, suggesting that VEGF expression and tumour stemness contribute to the relapse. In vitro studies demonstrated that VEGF, via activation of VEGFR2, increased the number of CD133+ CSCs and enhanced their capacity for self-renewal by inducing the expression of Nanog. In vivo studies further demonstrated that VEGF-treated CD133+ CSCs formed tumours larger than those developing from unstimulated cells and VEGF pre-treatment increased the tumorigenic cell frequency of primary HCC cells dependently on the presence of Nanog and VEGFR2. In HCC tissue derived from patients with early recurrence, almost all CD133+ cells were Nanog and p-VEGFR2 positive, suggesting that activation of VEGFR2 is critical for RFA-induced tumour stemness in HCC. In summary, RFA-induced VEGF promotes tumour stemness and accelerates tumourigenesis in HCC in a manner dependent on Nanog and VEGFR2, which is valuable for the prediction of HCC recurrence after RFA and the development of novel therapeutics.
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Affiliation(s)
- Kai Liu
- Capital Medical University affiliated Beijing You An Hospital, Beijing, 100069, China.,Beijing Institute of Hepatology, Beijing, 100069, China
| | - Meijun Hao
- Capital Medical University affiliated Beijing You An Hospital, Beijing, 100069, China
| | - Yabo Ouyang
- Capital Medical University affiliated Beijing You An Hospital, Beijing, 100069, China.,Beijing Institute of Hepatology, Beijing, 100069, China
| | - Jiasheng Zheng
- Capital Medical University affiliated Beijing You An Hospital, Beijing, 100069, China
| | - Dexi Chen
- Capital Medical University affiliated Beijing You An Hospital, Beijing, 100069, China.,Beijing Institute of Hepatology, Beijing, 100069, China.,Organ Transplantation Center, the Affiliated Hospital of Qingdao University, Qingdao City, Shandong Province, 266003, China
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25
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ASPP2 involvement in p53-mediated HIV-1 envelope glycoprotein gp120 neurotoxicity in mice cerebrocortical neurons. Sci Rep 2016; 6:33378. [PMID: 27625111 PMCID: PMC5022057 DOI: 10.1038/srep33378] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2016] [Accepted: 08/22/2016] [Indexed: 12/12/2022] Open
Abstract
The mechanisms behind HIV-1-associated neurocognitive disorders are still unclear. Apoptosis-stimulating protein 2 of p53 (ASPP2) is a damage-inducible p53-binding protein that stimulates p53-mediated apoptosis and transactivates proapoptotic and cell cycle regulatory genes. It has been reported that ASPP2 has a specific regulatory function in the death of retinal ganglion cells and the development of Alzheimer's disease. In this study, we used p53 and ASPP2 knockout mice and primary cerebrocortical neuron culture to analyze the role of the interaction between ASPP2 with p53 in HIV-1 envelope glycoprotein gp120-induced neurotoxicity. The results showed that 10 ng/mL gp120 protein might stimulate p53 overexpression and translocation to the nucleus, and 30 ng/mL gp120 protein could stimulate both p53 and ASPP2 translocation to the nucleus, but only with p53 overexpression. The primary cultured neurons of p53(-/-)ASPP2(+/-) mice had a higher survival rate than p53(-/-) mice under gp120 protein stress. The interaction of ASPP2 with p53 induced by a high dose of gp120 stimulated Bax transcription and contributed to caspase-3 cleavage, and ASPP2-siRNA attenuated gp120 induced neuron death through inhibition of Bax expression. These results suggest that ASPP2 plays an important role in p53-mediated neuronal apoptosis under gp120 stress.
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