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Xia JK, Qin XQ, Zhang L, Liu SJ, Shi XL, Ren HZ. Roles and regulation of histone acetylation in hepatocellular carcinoma. Front Genet 2022; 13:982222. [PMID: 36092874 PMCID: PMC9452893 DOI: 10.3389/fgene.2022.982222] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Accepted: 08/03/2022] [Indexed: 11/13/2022] Open
Abstract
Hepatocellular Carcinoma (HCC) is the most frequent malignant tumor of the liver, but its prognosis is poor. Histone acetylation is an important epigenetic regulatory mode that modulates chromatin structure and transcriptional status to control gene expression in eukaryotic cells. Generally, histone acetylation and deacetylation processes are controlled by the opposing activities of histone acetyltransferases (HATs) and histone deacetylases (HDACs). Dysregulation of histone modification is reported to drive aberrant transcriptional programmes that facilitate liver cancer onset and progression. Emerging studies have demonstrated that several HDAC inhibitors exert tumor-suppressive properties via activation of various cell death molecular pathways in HCC. However, the complexity involved in the epigenetic transcription modifications and non-epigenetic cellular signaling processes limit their potential clinical applications. This review brings an in-depth view of the oncogenic mechanisms reported to be related to aberrant HCC-associated histone acetylation, which might provide new insights into the effective therapeutic strategies to prevent and treat HCC.
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Affiliation(s)
- Jin-kun Xia
- Department of Hepatobiliary Surgery, Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, China
- Hepatobiliary Institute Nanjing University, Nanjing, China
| | - Xue-qian Qin
- Department of Hepatobiliary Surgery, Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, China
| | - Lu Zhang
- Department of Hepatobiliary Surgery, Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, China
| | - Shu-jun Liu
- Department of Hepatobiliary Surgery, Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, China
| | - Xiao-lei Shi
- Department of Hepatobiliary Surgery, Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, China
- Hepatobiliary Institute Nanjing University, Nanjing, China
| | - Hao-zhen Ren
- Department of Hepatobiliary Surgery, Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, China
- Hepatobiliary Institute Nanjing University, Nanjing, China
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Melekhova A, Baniahmad A. ING Tumour Suppressors and ING Splice Variants as Coregulators of the Androgen Receptor Signalling in Prostate Cancer. Cells 2021; 10:cells10102599. [PMID: 34685579 PMCID: PMC8533759 DOI: 10.3390/cells10102599] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Revised: 09/25/2021] [Accepted: 09/28/2021] [Indexed: 12/12/2022] Open
Abstract
Prevention and overcoming castration resistance of prostate cancer (PC) remains one of the main unsolved problems in modern oncology. Hence, many studies are focused on the investigation of novel androgen receptor (AR) regulators that could serve as potential drug targets in disease therapy. Among such factors, inhibitor of growth (ING) proteins were identified. Some ING proteins act as AR transcriptional coregulators, indicating their relevance for PC research. The ING family consists of five protein-coding genes from ING1 to ING5 and pseudogene INGX. The ING genes were revealed through their sequence homology to the first identified ING1 from an in vivo screen. ING factors are a part of histone modification complexes. With the help of the conserved plant homeodomain (PHD) motif, ING factors bind to Histone 3 Lysine 4 (H3K4) methylation mark with a stronger affinity to the highest methylation grade H3K4me3 and recruit histone acetyltransferases (HAT) and histone deacetylases (HDAC) to chromatin. ING1 and ING2 are core subunits of mSIN3a-HDAC corepressor complexes, whereas ING3–5 interact with different HAT complexes that serve as coactivators. ING members belong to type II tumour suppressors and are frequently downregulated in many types of malignancies, including PC. As the family name indicates, ING proteins are able to inhibit cell growth and tumour development via regulation of cell cycle and cancer-relevant pathways such as apoptosis, cellular senescence, DNA repair, cell migration, invasion, and angiogenesis. Many ING splice variants that enhance the diversity of ING activity were discovered. However, it seems that the existence of multiple ING splice variants is underestimated, since alternative splice variants, such as the AR coregulators ING1 and ING3, counteract full-length ING and thus play an opposite functional role. These results open a novel prospective investigation direction in understanding ING factors biology in PC and other malignancies.
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Affiliation(s)
| | - Aria Baniahmad
- Correspondence: ; Tel.: +49-3641-9396-820; Fax: +49-3641-9396-822
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EL Moussaoui A, Bourhia M, Jawhari FZ, Mechchate H, Slighoua M, Bari A, Ullah R, Mahmood HM, Ali SS, Ibenmoussa S, Bousta D, Bari A. Phytochemical Identification, Acute, and Sub-Acute Oral Toxicity Studies of the Foliar Extract of Withania frutescens. Molecules 2020; 25:molecules25194528. [PMID: 33023252 PMCID: PMC7583005 DOI: 10.3390/molecules25194528] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 09/19/2020] [Accepted: 09/27/2020] [Indexed: 11/20/2022] Open
Abstract
Withania frutescens (W. frutescens) is a medicinal plant widely used to treat several diseases. This work aims to study phytochemical composition as well as acute and subacute toxicity of W. frutescens hydroethanolic extract in mice. The phytochemical composition of W. frutescens extract was performed using gas chromatographic analysis. Acute toxicity was studied in vivo with oral administration of single doses 400 mg/kg, 1000 mg/kg, and 2000 mg/kg for 14 days. Subacute toxicity was studied with the administration of repeated doses of 400 mg/kg/day and 2000 mg/kg/day for 28 days. Phytochemical analysis of W. frutescens hydro-ethanolic extract confirmed the presence of interesting chemical compounds. Acute toxicity results showed no toxic symptoms in mice treated with an increasing dose up to a maximum of 2000 mg/kg. Alongside acute toxicity, subacute data showed no clinical symptoms nor biochemical or histological alteration in mice treated with an increasing dose up to a maximum of 2000 mg/kg compared to the control group (p < 0.05). This study shows no toxic effects in animals treated with W. frutescens extract, and, therefore, this plant can be considered safe in animals up to 2000 mg/kg under both acute and subacute toxicity conditions.
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Affiliation(s)
- Abdelfattah EL Moussaoui
- Laboratory of Biotechnology, Environment, Agrifood and Health, Faculty of Science, University of Sidi Mohamed Ben Abdellah, Fez BP.1796, Morocco; (A.E.M.); (F.Z.J.); (H.M.); (M.S.); (D.B.); (A.B.)
| | - Mohammed Bourhia
- Laboratory of Chemistry-Biochemistry, Environment, Nutrition, and Health, Faculty of Medicine and Pharmacy, University of Casablanca, Casablanca BP.5696, Morocco;
- Correspondence: ; Tel.: +212-610799873
| | - Fatima Zahra Jawhari
- Laboratory of Biotechnology, Environment, Agrifood and Health, Faculty of Science, University of Sidi Mohamed Ben Abdellah, Fez BP.1796, Morocco; (A.E.M.); (F.Z.J.); (H.M.); (M.S.); (D.B.); (A.B.)
| | - Hamza Mechchate
- Laboratory of Biotechnology, Environment, Agrifood and Health, Faculty of Science, University of Sidi Mohamed Ben Abdellah, Fez BP.1796, Morocco; (A.E.M.); (F.Z.J.); (H.M.); (M.S.); (D.B.); (A.B.)
| | - Meryem Slighoua
- Laboratory of Biotechnology, Environment, Agrifood and Health, Faculty of Science, University of Sidi Mohamed Ben Abdellah, Fez BP.1796, Morocco; (A.E.M.); (F.Z.J.); (H.M.); (M.S.); (D.B.); (A.B.)
| | - Ahmed Bari
- Department of Pharmaceutical Chemistry and Central Laboratory, College of Pharmacy King Saud University, Riyadh 11451, Saudi Arabia; (A.B.); (S.S.A.)
| | - Riaz Ullah
- Department of Pharmacognosy (MAPPRC), College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia;
| | - Hafiz Majid Mahmood
- Department of Pharmacology, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia;
| | - Syed Saeed Ali
- Department of Pharmaceutical Chemistry and Central Laboratory, College of Pharmacy King Saud University, Riyadh 11451, Saudi Arabia; (A.B.); (S.S.A.)
| | - Samir Ibenmoussa
- Laboratory of Chemistry-Biochemistry, Environment, Nutrition, and Health, Faculty of Medicine and Pharmacy, University of Casablanca, Casablanca BP.5696, Morocco;
| | - Dalila Bousta
- Laboratory of Biotechnology, Environment, Agrifood and Health, Faculty of Science, University of Sidi Mohamed Ben Abdellah, Fez BP.1796, Morocco; (A.E.M.); (F.Z.J.); (H.M.); (M.S.); (D.B.); (A.B.)
| | - Amina Bari
- Laboratory of Biotechnology, Environment, Agrifood and Health, Faculty of Science, University of Sidi Mohamed Ben Abdellah, Fez BP.1796, Morocco; (A.E.M.); (F.Z.J.); (H.M.); (M.S.); (D.B.); (A.B.)
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Zhang R, Jin J, Shi J, Hou Y. INGs are potential drug targets for cancer. J Cancer Res Clin Oncol 2016; 143:189-197. [PMID: 27544390 DOI: 10.1007/s00432-016-2219-z] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Accepted: 08/09/2016] [Indexed: 12/11/2022]
Abstract
PURPOSE The inhibitor of growth (ING) family consists of ING1, ING2, ING3, ING4 and ING5, which function as the type II tumor suppressors. INGs regulate cell proliferation, senescence, apoptosis, differentiation, angiogenesis, DNA repair, metastasis, and invasion by multiple pathways. In addition, INGs increase cancer cell sensitivity for chemotherapy and radiotherapy, while clinical observations show that INGs are frequently lost in some types of cancers. The aim of the study was to summarize the recent progress regarding INGs regulating tumor progression. METHODS The literatures of INGs regulating tumor progression were searched and assayed. RESULTS The regulating signaling pathways of ING1, ING2, ING3 or ING4 on tumor progression were shown. The mechanisms of INGs on tumor suppression were also assayed. CONCLUSIONS This review better summarized the signaling mechanism of INGs on tumor suppression, which provides a candidate therapy strategy for cancers.
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Affiliation(s)
- Runyun Zhang
- Department of Oncology, Affiliated Wujin People's Hospital, Jiangsu University, Changzhou, 212017, People's Republic of China.,Institute of Life Sciences, Jiangsu University, Zhenjiang, 212013, People's Republic of China
| | - Jianhua Jin
- Department of Oncology, Affiliated Wujin People's Hospital, Jiangsu University, Changzhou, 212017, People's Republic of China
| | - Juanjuan Shi
- Institute of Life Sciences, Jiangsu University, Zhenjiang, 212013, People's Republic of China.
| | - Yongzhong Hou
- Department of Oncology, Affiliated Wujin People's Hospital, Jiangsu University, Changzhou, 212017, People's Republic of China. .,Institute of Life Sciences, Jiangsu University, Zhenjiang, 212013, People's Republic of China.
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Patel SB, Rao NJ, Hingorani LL. Safety assessment of Withania somnifera extract standardized for Withaferin A: Acute and sub-acute toxicity study. J Ayurveda Integr Med 2016; 7:30-7. [PMID: 27297507 PMCID: PMC4910650 DOI: 10.1016/j.jaim.2015.08.001] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2015] [Revised: 07/06/2015] [Accepted: 08/12/2015] [Indexed: 01/24/2023] Open
Abstract
Background The use of Withania somnifera is increasing due to a number of its chemical constituents found useful for health. Objective The present study was carried out to investigate the potential adverse effects (if any) of a standardized Withania somnifera extract (WSE) in rats following acute and sub chronic administration. Materials and methods The toxicity study was performed in Wistar rats by oral administration. An acute toxicity study was done at the dose of 2000 mg/kg. In the sub-acute study, Wistar rats (10/sex/group) were administered via gavage 0 (control), 500, 1000, 2000 mg/kg body weight/day of WSE for 28 days. Among two additional satellite groups, one group did not receive any drug while the second group received 2000 mg/kg/day for 28 days. At the end of study, the animals sacrificed and their body weight, hematology, serum chemistry, and histopathology evaluation was done. Results In acute toxicity studies, oral LD50 of WSE in Wistar rats was greater than 2000 mg/kg body weight. Compared to the control group in sub-acute toxicity study, administration of extract did not show any toxicologically significant treatment related changes in clinical observations, ophthalmic examination, body weight gain, feed consumption, clinical pathology evaluation, and organ weight. Hematological and serum chemistry parameters were within the normal limits. Terminal necropsy did not reveal any treatment related gross or histopathological findings. Conclusion Based on this study, the no-observed-adverse-effect-level of WSE is 2000 mg/kg body weight, the highest level tested.
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Affiliation(s)
- Shruti B Patel
- Department of Pharmacology, Sardar Patel College of Pharmacy, Bakrol, India
| | - Nirav J Rao
- Department of Pharmacology, Sardar Patel College of Pharmacy, Bakrol, India
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Gong SJ, Feng XJ, Song WH, Chen JM, Wang SM, Xing DJ, Zhu MH, Zhang SH, Xu AM. Upregulation of PP2Ac predicts poor prognosis and contributes to aggressiveness in hepatocellular carcinoma. Cancer Biol Ther 2015; 17:151-62. [PMID: 26618405 DOI: 10.1080/15384047.2015.1121345] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Protein phosphatase 2A (PP2A) is a heterotrimeric protein phosphatase consisting of a 36-kD catalytic C subunit (PP2Ac). This study aimed to explore the prognostic and biological significance of PP2Ac in human hepatocellular carcinoma (HCC). High PP2Ac expression was significantly (P < 0.01) associated with serum hepatitis B surface antigen positivity, serum hepatitis B e antigen positivity, liver cirrhosis, moderate to poor differentiation grade, advanced disease stage, intrahepatic metastasis, and early recurrence in HCC. Multivariate analysis revealed PP2Ac as an independent prognostic factor for overall survival. Enforced expression of hepatitis B virus X protein (HBx) and its carboxyl-terminal truncated isoform induced PP2Ac expression in HCC cells. Co-immunoprecipitation assay revealed a direct interaction between PP2Ac and HBx. Small interfering RNA-mediated knockdown of PP2Ac significantly inhibited in vitro cell proliferation, colony formation, migration, and invasion and reduced tumor growth in an xenograft mouse model. In contrast, overexpression of PP2Ac promoted HCC cell proliferation, colony formation, and tumorigenesis. Additionally, silencing of PP2Ac impaired the growth-promoting effects on HepG2 HCC cells elicited by overexpression of carboxyl-terminal truncated HBx. Gene expression profiling analysis showed that PP2Ac downregulation modulated the expression of numerous genes involved in cell cycle and apoptosis regulation. Collectively, PP2Ac upregulation has a poor prognostic impact on the overall survival of HCC patients and contributes to the aggressiveness of HCC. PP2Ac may represent a potential therapeutic target for HCC.
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Affiliation(s)
- Shao-Juan Gong
- a Department of Interventional oncology , Renji Hospital, School of Medicine, Shanghai Jiao Tong University , Shanghai , China
| | - Xiao-Jun Feng
- b Department of Pathology , Yueyang Hospital, Shanghai University of Traditional Chinese Medicine , Shanghai , China
| | - Wei-Hua Song
- a Department of Interventional oncology , Renji Hospital, School of Medicine, Shanghai Jiao Tong University , Shanghai , China
| | - Jian-Ming Chen
- a Department of Interventional oncology , Renji Hospital, School of Medicine, Shanghai Jiao Tong University , Shanghai , China
| | - Shou-Mei Wang
- b Department of Pathology , Yueyang Hospital, Shanghai University of Traditional Chinese Medicine , Shanghai , China
| | - Dong-Juan Xing
- a Department of Interventional oncology , Renji Hospital, School of Medicine, Shanghai Jiao Tong University , Shanghai , China
| | - Ming-Hua Zhu
- c Department of Pathology , Changhai Hospital and Institute of Liver Diseases, Second Military Medical University , Shanghai , China
| | - Shu-Hui Zhang
- b Department of Pathology , Yueyang Hospital, Shanghai University of Traditional Chinese Medicine , Shanghai , China
| | - Ai-Min Xu
- a Department of Interventional oncology , Renji Hospital, School of Medicine, Shanghai Jiao Tong University , Shanghai , China
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Abstract
Abnormalities in the TP53 gene and overexpression of MDM2, a transcriptional target and negative regulator of p53, are commonly observed in cancers. The MDM2-p53 feedback loop plays an important role in tumor progression and thus, increased understanding of the pathway has the potential to improve clinical outcomes for cancer patients. Hepatocellular carcinoma (HCC) has emerged as one of the most commonly diagnosed forms of human cancer; yet, the current treatment for HCC is less effective than those used against other cancers. We review the current studies of the MDM2-p53 pathway in cancer with a focus on HCC and specifically discuss the impact of p53 mutations along with other alterations of the MDM2-p53 feedback loop in HCC. We also discuss the potential diagnostic and prognostic applications of p53 and MDM2 in malignant tumors as well as therapeutic avenues that are being developed to target the MDM2-p53 pathway.
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Affiliation(s)
- Xuan Meng
- Department of Radiation Oncology, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina. Lineberger Comprehensive Cancer Center, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina. Hospital and Institute of Hepatobiliary Surgery, Chinese PLA General Hospital, Beijing, China. Laboratory of Biological Cancer Therapy, Xuzhou Medical College, Xuzhou, China
| | - Derek A Franklin
- Department of Radiation Oncology, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina. Lineberger Comprehensive Cancer Center, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina. Department of Pharmacology, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Jiahong Dong
- Hospital and Institute of Hepatobiliary Surgery, Chinese PLA General Hospital, Beijing, China. Laboratory of Biological Cancer Therapy, Xuzhou Medical College, Xuzhou, China.
| | - Yanping Zhang
- Department of Radiation Oncology, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina. Lineberger Comprehensive Cancer Center, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina. Laboratory of Biological Cancer Therapy, Xuzhou Medical College, Xuzhou, China. Department of Pharmacology, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina.
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Wu Q, Chen YF, Fu J, You QH, Wang SM, Huang X, Feng XJ, Zhang SH. Short hairpin RNA-mediated down-regulation of CENP-A attenuates the aggressive phenotype of lung adenocarcinoma cells. Cell Oncol (Dordr) 2014; 37:399-407. [PMID: 25228009 DOI: 10.1007/s13402-014-0199-z] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/04/2014] [Indexed: 01/03/2023] Open
Abstract
BACKGROUND Deregulation of centromere protein (CENP)-A, a centromere-specific histone variant, has in the past been linked to cancer initiation and progression. Additionally, our previous work has shown that CENP-A upregulation predicts a poor overall survival in patients with lung adenocarcinoma. The aim of this study was to uncover the biological role of CENP-A in lung adenocarcinoma growth and invasion, including its underlying molecular mechanisms. METHODS CENP-A expression was knocked down in human lung adenocarcinoma A549 and PC-9 cells using a short hairpin RNA (shRNA) technology. Subsequently, the effects of this knock down on the proliferation, apoptosis, cell cycle progression, colony formation, migration, invasion and tumorigenicity were assessed. Additionally, Western blot analyses were performed to examine concomitant expression changes in key proteins involved in cell cycle regulation and apoptosis. RESULTS We found that shRNA-mediated knock down of CENP-A significantly inhibited the in vitro proliferation and colony formation of A549 and PC-9 cells as compared to control shRNA-transfected cells. In addition, CENP-A down-regulation was found to induce G0/G1 cell cycle arrest and apoptosis, and to inhibit the in vitro migration and invasion of A549 and PC-9 cells. Down-regulation of CENP-A was also found to significantly suppress the in vivo growth of xenografted A549 cells. At the protein level, we found that the expression of p21, p27, CHK2 and Bax was markedly increased and that the expression of CCNG1, Skp2, Cks1 and Bcl-2 was markedly decreased in CENP-A down-regulated cells. CONCLUSION Based on our results we conclude that down-regulation of CENP-A may attenuate the aggressive phenotype of lung adenocarcinoma cells. As such, CENP-A may serve as a promising therapeutic target for lung adenocarcinoma.
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Affiliation(s)
- Qing Wu
- Department of Respiratory Medicine, Guangxing Hospital, Hangzhou Hospital of Traditional Chinese Medicine, Zhejiang University of Traditional Chinese Medicine, Hangzhou, People's Republic of China,
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Guérillon C, Bigot N, Pedeux R. The ING tumor suppressor genes: Status in human tumors. Cancer Lett 2014; 345:1-16. [DOI: 10.1016/j.canlet.2013.11.016] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2013] [Revised: 11/27/2013] [Accepted: 11/29/2013] [Indexed: 12/18/2022]
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Gu XM, Fu J, Feng XJ, Huang X, Wang SM, Chen XF, Zhu MH, Zhang SH. Expression and prognostic relevance of centromere protein A in primary osteosarcoma. Pathol Res Pract 2014; 210:228-33. [DOI: 10.1016/j.prp.2013.12.007] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/23/2013] [Revised: 11/19/2013] [Accepted: 12/16/2013] [Indexed: 11/25/2022]
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Kang J, Kim E, Kim W, Seong KM, Youn H, Kim JW, Kim J, Youn B. Rhamnetin and cirsiliol induce radiosensitization and inhibition of epithelial-mesenchymal transition (EMT) by miR-34a-mediated suppression of Notch-1 expression in non-small cell lung cancer cell lines. J Biol Chem 2013; 288:27343-27357. [PMID: 23902763 DOI: 10.1074/jbc.m113.490482] [Citation(s) in RCA: 142] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Radioresistance is a major cause of decreasing the efficiency of radiotherapy for non-small cell lung cancer (NSCLC). To understand the radioresistance mechanisms in NSCLC, we focused on the radiation-induced Notch-1 signaling pathway involved in critical cell fate decisions by modulating cell proliferation. In this study, we investigated the use of Notch-1-regulating flavonoid compounds as novel therapeutic drugs to regulate radiosensitivity in NSCLC cells, NCI-H1299 and NCI-H460, with different levels of radioresistance. Rhamnetin and cirsiliol were selected as candidate Notch-1-regulating radiosensitizers based on the results of assay screening for activity and pharmacological properties. Treatment with rhamnetin or cirsiliol reduced the proliferation of NSCLC cells through the suppression of radiation-induced Notch-1 expression. Indeed, rhamnetin and cirsiliol increased the expression of tumor-suppressive microRNA, miR-34a, in a p53-dependent manner, leading to inhibition of Notch-1 expression. Consequently, reduced Notch-1 expression promoted apoptosis through significant down-regulation of the nuclear factor-κB pathway, resulting in a radiosensitizing effect on NSCLC cells. Irradiation-induced epithelial-mesenchymal transition was also notably attenuated in the presence of rhamnetin and cirsiliol. Moreover, an in vivo xenograft mouse model confirmed the radiosensitizing and epithelial-mesenchymal transition inhibition effects of rhamnetin and cirsiliol we observed in vitro. In these mice, tumor volume was significantly reduced by combinational treatment with irradiation and rhamnetin or cirsiliol compared with irradiation alone. Taken together, our findings provided evidence that rhamnetin and cirsiliol can act as promising radiosensitizers that enhance the radiotherapeutic efficacy by inhibiting radiation-induced Notch-1 signaling associated with radioresistance possibly via miR-34a-mediated pathways.
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Affiliation(s)
- JiHoon Kang
- Department of Biological Sciences, Pusan National University, Busan 609-735
| | - EunGi Kim
- Department of Biological Sciences, Pusan National University, Busan 609-735
| | - Wanyeon Kim
- Department of Biological Sciences, Pusan National University, Busan 609-735
| | - Ki Moon Seong
- Division of Radiation Effect Research, Radiation Health Research Institute, Korea Hydro and Nuclear Power Co., Ltd., Seoul 132-703
| | - HyeSook Youn
- Department of Bioscience and Biotechnology/Institute of Bioscience, Sejong University, Seoul 143-747
| | - Jung Woo Kim
- Department of Life Science and Biotechnology, Pai Chai University, Daejeon 302-735
| | - Joon Kim
- School of Life Sciences and Biotechnology and BioInstitute, Korea University, Seoul 136-701, South Korea
| | - BuHyun Youn
- Department of Biological Sciences, Pusan National University, Busan 609-735.
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Jin T, Fu J, Feng XJ, Wang SM, Huang X, Zhu MH, Zhang SH. SiRNA-targeted carboxypeptidase D inhibits hepatocellular carcinoma growth. Cell Biol Int 2013; 37:929-39. [PMID: 23589395 DOI: 10.1002/cbin.10113] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2013] [Accepted: 04/03/2013] [Indexed: 12/16/2022]
Affiliation(s)
- Tao Jin
- The First Department of Surgery; Zhejiang Hospital of Integrated Traditional Chinese and Western Medicine, Zhejiang University of Traditional Chinese Medicine; Hangzhou, P.R.; China
| | - Jie Fu
- Department of Radiation Oncology; Shanghai Sixth People's Hospital Affiliated to Shanghai Jiaotong University; Shanghai, P.R.; China
| | - Xiao-Jun Feng
- Department of Pathology; Yueyang Hospital, Shanghai University of Traditional Chinese Medicine; Shanghai, P.R.; China
| | - Shou-Mei Wang
- Department of Pathology; Yueyang Hospital, Shanghai University of Traditional Chinese Medicine; Shanghai, P.R.; China
| | - Xue Huang
- Department of Pathology; Yueyang Hospital, Shanghai University of Traditional Chinese Medicine; Shanghai, P.R.; China
| | - Ming-Hua Zhu
- Department of Pathology; Changhai Hospital and Institute of Liver Diseases, Second Military Medical University; Shanghai, P.R.; China
| | - Shu-Hui Zhang
- Department of Pathology; Yueyang Hospital, Shanghai University of Traditional Chinese Medicine; Shanghai, P.R.; China
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Jourquin J, Duncan D, Shi Z, Zhang B. GLAD4U: deriving and prioritizing gene lists from PubMed literature. BMC Genomics 2012; 13 Suppl 8:S20. [PMID: 23282288 PMCID: PMC3535723 DOI: 10.1186/1471-2164-13-s8-s20] [Citation(s) in RCA: 89] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Background Answering questions such as "Which genes are related to breast cancer?" usually requires retrieving relevant publications through the PubMed search engine, reading these publications, and creating gene lists. This process is not only time-consuming, but also prone to errors. Results We report GLAD4U (Gene List Automatically Derived For You), a new, free web-based gene retrieval and prioritization tool. GLAD4U takes advantage of existing resources of the NCBI to ensure computational efficiency. The quality of gene lists created by GLAD4U for three Gene Ontology (GO) terms and three disease terms was assessed using corresponding "gold standard" lists curated in public databases. For all queries, GLAD4U gene lists showed very high recall but low precision, leading to low F-measure. As a comparison, EBIMed's recall was consistently lower than GLAD4U, but its precision was higher. To present the most relevant genes at the top of a list, we studied two prioritization methods based on publication count and the hypergeometric test, and compared the ranked lists and those generated by EBIMed to the gold standards. Both GLAD4U methods outperformed EBIMed for all queries based on a variety of quality metrics. Moreover, the hypergeometric method allowed for a better performance by thresholding genes with low scores. In addition, manual examination suggests that many false-positives could be explained by the incompleteness of the gold standards. The GLAD4U user interface accepts any valid queries for PubMed, and its output page displays the ranked gene list and information associated with each gene, chronologically-ordered supporting publications, along with a summary of the run and links for file export and functional enrichment and protein interaction network analysis. Conclusions GLAD4U has a high overall recall. Although precision is generally low, the prioritization methods successfully rank truly relevant genes at the top of the lists to facilitate efficient browsing. GLAD4U is simple to use, and its interface can be found at: http://bioinfo.vanderbilt.edu/glad4u.
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Affiliation(s)
- Jérôme Jourquin
- Department of Biomedical Informatics, Vanderbilt University School of Medicine, 400 Eskind Biomedical Library, 2209 Garland Avenue, Nashville, TN 37232, USA
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Adenovirus-mediated expression of p33(ING1b) induces apoptosis and inhibits proliferation in gastric adenocarcinoma cells in vitro. Gastric Cancer 2012; 15:355-62. [PMID: 22237655 DOI: 10.1007/s10120-011-0123-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/12/2011] [Accepted: 11/26/2011] [Indexed: 02/07/2023]
Abstract
BACKGROUND Inhibitor of growth 1b (ING1b) is considered to be a class II tumor suppressor gene. Although reduced expression of p33(ING1b) has been reported in many human malignancies, including gastric cancers, the effect of p33(ING1b) on gastric cancer cells has yet to be investigated. METHODS Expression of p33(ING1b) in gastric adenocarcinoma tissues and their adjacent non-malignant gastric mucosa, as well as in gastric adenocarcinoma cell lines and normal gastric epithelial cells, was detected by using Western blotting. Recombinant adenoviruses were prepared to mediate the ectopic expression of p33(ING1b) (Ad-ING1b) and green fluorescent protein (GFP)(Ad-GFP) in the gastric adenocarcinoma cell lines, SGC-7901, MKN28, and MKN45 and the normal gastric epithelial cell line GES-1. Alterations in the proliferation and apoptosis of the cells after adenoviral infection were determined by the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay and flow cytometry, respectively, and cell cycle distribution was analyzed in a fluorescence-activated cell sorter. RESULTS Western blotting confirmed the reduced expression of p33(ING1b) in gastric adenocarcinoma tissues and gastric adenocarcinoma cell lines. The ectopic expression of p33(ING1b) mediated by Ad-ING1b resulted in decreased growth, increased apoptosis, and cell cycle arrest at the G1 phase in both benign and malignant gastric epithelial cells regardless of their p53 status. Addition of a p53 inhibitor, pifithrin-α, did not abolish the pro-apoptotic and cell cycle-arresting effects of p33(ING1b) in p53 wild-type cells. CONCLUSIONS Down-regulation of p33(ING1b) might play an important role in the development of gastric adenocarcinoma. Targeted local expression of p33(ING1b) may offer a promising alternative therapeutic measure for gastric cancer.
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Jafarnejad SM, Li G. Regulation of p53 by ING family members in suppression of tumor initiation and progression. Cancer Metastasis Rev 2012; 31:55-73. [PMID: 22095030 DOI: 10.1007/s10555-011-9329-5] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The INhibitor of Growth (ING) family is an evolutionarily conserved set of proteins, implicated in suppression of initiation and progression of cancers in various tissues. They promote cell cycle arrest, cellular senescence and apoptosis, participate in stress responses, regulate DNA replication and DNA damage responses, and inhibit cancer cell migration, invasion, and angiogenesis of the tumors. At the molecular level, ING proteins are believed to participate in chromatin remodeling and transcriptional regulation of their target genes. However, the best known function of ING proteins is their cooperation with p53 tumor suppressor protein in tumor suppression. All major isoforms of ING family members can promote the transactivition of p53 and the majority of them are shown to directly interact with p53. In addition, ING proteins are thought to interact with and modulate the function of auxiliary members of p53 pathway, such as MDM2, ARF , p300, and p21, indicating their widespread involvement in the regulation and function of this prominent tumor suppressor pathway. It seems that p53 pathway is the main mechanism by which ING proteins exert their functions. Nevertheless, regulation of other pathways which are not relevant to p53, yet important for tumorigenesis such as TGF-β and NF-κB, by ING proteins is also observed. This review summarizes the current understanding of the mutual interactions and cooperation between different members of ING family with p53 pathway and implications of this cooperation in the suppression of cancer initiation and progression.
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Affiliation(s)
- Seyed Mehdi Jafarnejad
- Department of Dermatology and Skin Science, University of British Columbia, Vancouver, BC, Canada
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16
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Qiu MH, Qian YM, Zhao XL, Wang SM, Feng XJ, Chen XF, Zhang SH. Expression and prognostic significance of MAP4K4 in lung adenocarcinoma. Pathol Res Pract 2012; 208:541-8. [PMID: 22824148 DOI: 10.1016/j.prp.2012.06.001] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/30/2012] [Revised: 06/02/2012] [Accepted: 06/16/2012] [Indexed: 10/28/2022]
Abstract
Accumulating evidence indicates that mitogen-activated protein 4 kinase 4 (MAP4K4) is frequently overexpressed in many types of human cancers, and plays important roles in transformation, invasiveness, adhesion, and cell migration. The aim of the present study was to explore the expression and prognostic significance of MAP4K4 in lung adenocarcinoma. The results of real-time quantitative PCR and Western blotting analysis revealed an enhanced expression of MAP4K4 in lung adenocarcinomas relative to adjacent non-tumorous lung tissues at both transcriptional and translational levels. Immunohistochemistry showed that 130 of 309 (42%) lung adenocarcinomas had high expression of MAP4K4. MAP4K4 overexpression was significantly correlated with histological grade (p=0.027), pT status (p=0.048), pN status (p=0.006), and pleural invasion (p=0.024). Patients with high MAP4K4 expression had a shorter overall survival compared with those with low MAP4K4 expression, regardless of histological grade, pT status, pN status, or pleural invasion status. Multivariate analysis identified MAP4K4 as an independent prognostic factor for lung adenocarcinoma. In conclusion, our results demonstrate that elevated MAP4K4 expression is closely associated with lung adenocarcinoma progression and has an independent prognostic value in predicting overall survival for patients with lung adenocarcinoma.
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Affiliation(s)
- Mei-Hua Qiu
- Diagnostic and Treatment Centers for Tuberculosis, Zhejiang Hospital of Integrated Traditional Chinese and Western Medicine, Zhejiang University of Traditional Chinese Medicine, Hangzhou 310003, PR China
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Zhang SH, Qian YM, Liu AW, Cai J, Zhao XL, Wei JJ, Zhu MH. Clinicopathologic significance and function of S-phase kinase-associated protein 2 overexpression in hepatocellular carcinoma. Hum Pathol 2012; 43:1084-93. [DOI: 10.1016/j.humpath.2011.08.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/29/2011] [Revised: 08/27/2011] [Accepted: 08/31/2011] [Indexed: 12/14/2022]
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Wu Q, Qian YM, Zhao XL, Wang SM, Feng XJ, Chen XF, Zhang SH. Expression and prognostic significance of centromere protein A in human lung adenocarcinoma. Lung Cancer 2012; 77:407-14. [PMID: 22542705 DOI: 10.1016/j.lungcan.2012.04.007] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2011] [Revised: 03/16/2012] [Accepted: 04/05/2012] [Indexed: 10/28/2022]
Abstract
BACKGROUND Centromere protein A (CENP-A), one of the fundamental components of the human active kinetochore, is frequently upregulated in many cancers and plays important roles in cell cycle regulation, cell survival, and genetic stability. The aim of the present study was to explore the expression and prognostic significance of CENP-A in lung adenocarcinoma. EXPERIMENTAL DESIGN The expression of CENP-A was detected in 20 fresh human lung adenocarcinoma specimens and corresponding non-tumorous lung tissues by real-time polymerase chain reaction (RT-PCR) and Western blotting analysis. Using immunohistochemistry, we analyzed CENP-A protein expression in additional 309 lung adenocarcinomas. The clinicopathological and prognostic significance of CENP-A expression was analyzed. RESULTS RT-PCR and Western blotting analysis revealed an enhanced expression of CENP-A in lung adenocarcinomas relative to adjacent non-tumorous lung tissues at both transcriptional and translational levels. Immunohistochemistry showed that 146 of 309 lung adenocarcinomas (47.3%) had high expression of CENP-A. CENP-A overexpression was significantly correlated with pathological grade (P=0.009), pT status (P=0.017), pN status (P=0.002), pleural invasion (P=0.013), high Ki-67 expression (P=0.003), and P53 positivity (P=0.001). Patients with high CENP-A expression had shorter overall survival time compared with those with low CENP-A expression. Multivariate analysis identified CENP-A as an independent prognostic factor for lung adenocarcinoma. CONCLUSION Our results demonstrate that elevated CENP-A expression is closely associated with lung adenocarcinoma progression and has an independent prognostic value in predicting overall survival for patients with lung adenocarcinoma.
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Affiliation(s)
- Qing Wu
- Department of Respiratory Medicine, Hangzhou Hospital of Traditional Chinese Medicine, Zhejiang University of Traditional Chinese Medicine, Hangzhou 310007, PR China
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Lu M, Chen F, Wang Q, Wang K, Pan Q, Zhang X. Downregulation of inhibitor of growth 3 is correlated with tumorigenesis and progression of hepatocellular carcinoma. Oncol Lett 2012; 4:47-52. [PMID: 22807958 DOI: 10.3892/ol.2012.685] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2012] [Accepted: 03/30/2012] [Indexed: 11/06/2022] Open
Abstract
ING3, a member of the inhibitor of growth (ING) family, has been reported to be involved in transcription modulation, cell cycle control and the induction of apoptosis. Previous studies have demonstrated that the expression of ING3 decreased in melanoma and head and neck squamous cell carcinoma (HNSCC). The aim of this study was to investigate the role of ING3 in hepatocellular carcinoma (HCC) tumorigenesis and progression. The correlation between ING3 expression and clinicopathological variables of HCC was analyzed. Using the real-time reverse transcription-polymerase chain reaction (RT-PCR), it was found that ING3 was downregulated in HCC tissues compared with adjacent non-cancerous tissues (p<0.05). The immunohistochemical staining of tissue microarray data indicated a significant reduction of ING3 expression in 57.14% of HCC cases (64/112). In addition, the downregulation of ING3 was associated with the tumor differentiation stage. Most HCC samples of Edmondson-Steiner grades II to III exhibited inhibition of ING3 expression. The overexpression of ING3 in HCC cells was found to suppress cell proliferation, colony formation and cell migration, suggesting that ING3 acts as a tumor suppressor in HCC cells. Taken together, the data revealed that ING3 may serve as a suppression factor during tumorigenesis and progression of HCC.
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Affiliation(s)
- Meiling Lu
- The Central Laboratory, People's 10th Hospital, Shanghai 200072
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Li Y, Zhu Z, Zhang S, Yu D, Yu H, Liu L, Cao X, Wang L, Gao H, Zhu M. ShRNA-targeted centromere protein A inhibits hepatocellular carcinoma growth. PLoS One 2011; 6:e17794. [PMID: 21423629 PMCID: PMC3058037 DOI: 10.1371/journal.pone.0017794] [Citation(s) in RCA: 91] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2010] [Accepted: 02/11/2011] [Indexed: 11/30/2022] Open
Abstract
Background Centromere protein A (CENP-A) plays important roles in cell-cycle regulation and genetic stability. Herein, we aimed to investigate its expression pattern, clinical significance, and biological function in hepatocellular carcinoma (HCC). Methodology/Principal Findings CENP-A expression at the mRNA and protein levels was examined in 20 pairs of fresh HCCs and corresponding nontumor liver tissues. Immunohistochemistry for CENP-A was performed on 80 paraffin-embedded HCC specimens, and the clinical significance of its expression was analyzed. A human HCC cell line HepG2 with high abundance of CENP-A was used to study the effects of manipulating CENP-A on HCC growth. Quantitative real-time polymerase chain reaction arrays and Western blot analysis were employed to identify the cell-cycle control- and apoptosis-related genes regulated by CENP-A. The results showed that CENP-A was aberrantly overexpressed in HCCs relative to adjacent nontumor tissues. This overexpression was significantly associated with positive serum HBsAg status, increased histological grade, high Ki-67 index and P53 immunopositivity. Knockdown of CENP-A in HepG2 cells reduced cell proliferation, blocked cell cycle at the G1 phase, and increased apoptosis. The antiproliferative effects of CENP-A silencing were also observed in vivo. Conversely, CENP-A overexpression promoted HCC cell growth and reduced apoptosis. Furthermore, many genes implicated in cell-cycle regulation and apoptosis, including CHK2, P21waf1, P27 Kip1, SKP2, cyclin G1, MDM2, Bcl-2, and Bax, were deregulated by manipulating CENP-A. Conclusions/Significance Overexpression of CENP-A is frequently observed in HCC. Targeting CENP-A can inhibit HCC growth, likely through the regulation of a large number genes involved in cell-cycle progression and apoptosis, and thereby represents a potential therapeutic strategy for this malignancy.
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Affiliation(s)
- Yongmei Li
- Department of Pathology, Changhai Hospital, Second Military Medical University, Shanghai, China
- Department of Pathology, Medical College, Tongji University, Shanghai, China
| | - Zhi Zhu
- Department of Pathology, Changhai Hospital, Second Military Medical University, Shanghai, China
| | - Shuhui Zhang
- Department of Pathology, Yueyang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Danghui Yu
- Department of Pathology, Changhai Hospital, Second Military Medical University, Shanghai, China
| | - Hongyu Yu
- Department of Pathology, Changhai Hospital, Second Military Medical University, Shanghai, China
| | - Lina Liu
- Department of Pathology, Changhai Hospital, Second Military Medical University, Shanghai, China
| | - Xiaozhe Cao
- Department of Pathology, Changhai Hospital, Second Military Medical University, Shanghai, China
| | - Li Wang
- Department of Pathology, Changhai Hospital, Second Military Medical University, Shanghai, China
| | - Hengjun Gao
- National Engineering Center for Biochip at Shanghai, Shanghai, China
| | - Minghua Zhu
- Department of Pathology, Changhai Hospital, Second Military Medical University, Shanghai, China
- Institute of Liver Diseases, Second Military Medical University, Shanghai, China
- * E-mail:
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Niini T, Lahti L, Michelacci F, Ninomiya S, Hattinger CM, Guled M, Böhling T, Picci P, Serra M, Knuutila S. Array comparative genomic hybridization reveals frequent alterations of G1/S checkpoint genes in undifferentiated pleomorphic sarcoma of bone. Genes Chromosomes Cancer 2011; 50:291-306. [DOI: 10.1002/gcc.20851] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2010] [Accepted: 12/02/2010] [Indexed: 12/13/2022] Open
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Song L, Gao M, Dong W, Hu M, Li J, Shi X, Hao Y, Li Y, Huang C. p85α mediates p53 K370 acetylation by p300 and regulates its promoter-specific transactivity in the cellular UVB response. Oncogene 2010; 30:1360-71. [PMID: 21057544 DOI: 10.1038/onc.2010.506] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Inducible acetylation of p53 at lysine residues has a great impact on regulating the transactivation of this protein, which is associated with cell growth arrest and/or apoptosis under various stress conditions. However, the factor(s) for regulating p53 acetylation remains largely unknown. In the current study, we have shown that p85α, the regulatory subunit of phosphatidylinositol-3-kinase, has a critical role in mediating p53 acetylation and promoter-specific transactivation in the ultraviolet B (UVB) response. Depletion of p85α in mouse embryonic fibroblasts significantly impairs UVB-induced apoptosis, as well as p53 transactivation and acetylation at Lys370 (Lys373 of human p53); however, the accumulation, nuclear translocation and phosphorylation of p53 are not affected. Interestingly, p85α binds to p300, promotes the p300-p53 interaction and the subsequent recruitment of the p53/p300 complex to the promoter region of the specific p53 target gene in response to UVB irradiation. Moreover, ablation of p53 acetylation at Lys370 by site-directed mutagenesis dramatically suppresses UVB-induced expression of the specific p53-responsive gene as well as cell apoptosis. Therefore, we conclude that p85α is a novel regulator of p53-mediated response under certain stress conditions, and targeting the p85α-dependent p53 pathway may be promising for cancer therapy.
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Affiliation(s)
- L Song
- Nelson Institute of Environmental Medicine, Department of Environmental Medicine, New York University School of Medicine, Tuxedo, NY, USA.
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Widodo N, Priyandoko D, Shah N, Wadhwa R, Kaul SC. Selective killing of cancer cells by Ashwagandha leaf extract and its component Withanone involves ROS signaling. PLoS One 2010; 5:e13536. [PMID: 20975835 PMCID: PMC2958829 DOI: 10.1371/journal.pone.0013536] [Citation(s) in RCA: 106] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2010] [Accepted: 09/23/2010] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND AND PURPOSE Ashwagandha is a popular Ayurvedic herb used in Indian traditional home medicine. It has been assigned a variety of health-promoting effects of which the mechanisms remain unknown. We previously reported the selective killing of cancer cells by leaf extract of Ashwagandha (i-Extract) and its purified component Withanone. In the present study, we investigated its mechanism by loss-of-function screening (abrogation of i-Extract induced cancer cell killing) of the cellular targets and gene pathways. METHODOLOGY/PRINCIPAL FINDINGS Randomized ribozyme library was introduced into cancer cells prior to the treatment with i-Extract. Ribozymes were recovered from cells that survived the i-Extract treatment. Gene targets of the selected ribozymes (as predicted by database search) were analyzed by bioinformatics and pathway analyses. The targets were validated for their role in i-Extract induced selective killing of cancer cells by biochemical and molecular assays. Fifteen gene-targets were identified and were investigated for their role in specific cancer cell killing activity of i-Extract and its two major components (Withaferin A and Withanone) by undertaking the shRNA-mediated gene silencing approach. Bioinformatics on the selected gene-targets revealed the involvement of p53, apoptosis and insulin/IGF signaling pathways linked to the ROS signaling. We examined the involvement of ROS-signaling components (ROS levels, DNA damage, mitochondrial structure and membrane potential) and demonstrate that the selective killing of cancer cells is mediated by induction of oxidative stress. CONCLUSION Ashwagandha leaf extract and Withanone cause selective killing of cancer cells by induction of ROS-signaling and hence are potential reagents that could be recruited for ROS-mediated cancer chemotherapy.
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Affiliation(s)
- Nashi Widodo
- National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, Japan
- Department of Biology, Faculty of Mathematics and Natural Sciences, Brawijaya University, Malang, Indonesia
| | - Didik Priyandoko
- National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, Japan
- Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Navjot Shah
- National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, Japan
- Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Renu Wadhwa
- National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, Japan
- * E-mail: (SCK); (RW)
| | - Sunil C. Kaul
- National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, Japan
- * E-mail: (SCK); (RW)
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Iakova P, Timchenko L, Timchenko NA. Intracellular signaling and hepatocellular carcinoma. Semin Cancer Biol 2010; 21:28-34. [PMID: 20850540 DOI: 10.1016/j.semcancer.2010.09.001] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2010] [Revised: 09/05/2010] [Accepted: 09/09/2010] [Indexed: 12/13/2022]
Abstract
Liver cancer is the fifth most common cancer and the third most common cause of cancer related death in the world. The recent development of new techniques for the investigations of global change in the gene expression, signaling pathways and wide genome binding has provided novel information for the mechanisms underlying liver cancer progression. Although these studies identified gene expression signatures in hepatocellular carcinoma, the early steps of the development of hepatocellular carcinomas (HCC) are not well understood. The development of HCC is a multistep process which includes the progressive alterations of gene expression leading to the increased proliferation and to liver cancer. This review summarizes recent progress in the identification of the key steps of the development of HCC with the focus on early events of carcinogenesis and on the role of translational and epigenetic alterations in the development of HCC. Quiescent stage of the liver is supported by several tumor suppressor proteins including p53, Rb and C/EBPα. Studies with chemical models of liver carcinogenesis and with human HCC have shown that the elevation of gankyrin is responsible for the elimination of these three proteins at early steps of carcinogenesis. Later stages of progression of the liver cancer are associated with alterations in many signaling pathways including translation which leads to epigenetic silencing/activation of many genes. Particularly, recent reports suggest a critical role of histone deacetylase 1, HDAC1, in the development of HCC through the interactions with transcription factors such as C/EBP family proteins.
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Affiliation(s)
- Polina Iakova
- Department of Pathology and Immunology and Huffington Center on Aging, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, United States
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Piche B, Li G. Inhibitor of growth tumor suppressors in cancer progression. Cell Mol Life Sci 2010; 67:1987-99. [PMID: 20195696 PMCID: PMC11115670 DOI: 10.1007/s00018-010-0312-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2009] [Revised: 01/11/2010] [Accepted: 01/29/2010] [Indexed: 12/27/2022]
Abstract
The inhibitor of growth (ING) family of tumor suppressors has five members and is implicated in the control of apoptosis, senescence, DNA repair, and cancer progression. However, little is known about ING activity in the regulation of cancer progression. ING members and splice variants seem to behave differently with respect to cancer invasion and metastasis. Interaction with histone trimethylated at lysine 4 (H3K4me3), hypoxia inducible factor-1 (HIF-1), p53, and nuclear factor kappa-B (NF-kappaB) are potential mechanisms by which ING members exert effects on invasion and metastasis. Subcellular mislocalization, rapid protein degradation, and to a lesser extent ING gene mutation are among the mechanisms responsible for inappropriate ING levels in cancer cells. The aim of this review is to summarize the different roles of ING family tumor suppressors in cancer progression and the molecular mechanisms involved.
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Affiliation(s)
- Brad Piche
- Department of Dermatology and Skin Science, Jack Bell Research Centre, Vancouver Coastal Health Research Institute, University of British Columbia, 2660 Oak Street, Vancouver, BC V6H 3Z6 Canada
| | - Gang Li
- Department of Dermatology and Skin Science, Jack Bell Research Centre, Vancouver Coastal Health Research Institute, University of British Columbia, 2660 Oak Street, Vancouver, BC V6H 3Z6 Canada
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