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Fei Q, Song F, Jiang X, Hong H, Xu X, Jin Z, Zhu X, Dai B, Yang J, Sui C, Xu M. LncRNA ST8SIA6-AS1 promotes hepatocellular carcinoma cell proliferation and resistance to apoptosis by targeting miR-4656/HDAC11 axis. Cancer Cell Int 2020; 20:232. [PMID: 32536820 PMCID: PMC7288512 DOI: 10.1186/s12935-020-01325-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Accepted: 06/04/2020] [Indexed: 12/24/2022] Open
Abstract
Background Dysregulation of long non-coding RNAs (lncRNAs) results in development of human diseases including hepatocellular carcinoma (HCC). Although several HCC related lncRNAs have been reported, the biological functions of many lncRNAs during the development of HCC remains unknown. Methods The expression of ST8SIA6-AS1 was studied by realtime PCR (RT-qPCR) and bioinformatic analysis. The biological functions of ST8SIA6-AS1 was examined by CCK-8 assay and flow cytometry analysis. The target of ST8SIA6-AS1 was analyzed by bioinformatic analysis and validated by dual luciferase reporter assay, western blotting and RT-qPCR. Results In this study we demonstrated that ST8SIA6-AS1 was an upregulated lncRNA in hepatocellular carcinoma. SiRNA-mediated knockdown of ST8SIA6-AS1 repressed cell proliferation and induced cell apoptosis in HCC cells. Bioinformatic analysis and RT-qPCR further showed that ST8SIA6-AS1 mainly located in cytoplasm. Dual luciferase reporter assay further revealed that ST8SIA6-AS1 interacted with miR-4656 in HCC cells. In addition, HDAC11 was identified as a target gene in HCC cells and ST8SIA6-AS1 could upregulate HDAC11 via sponging miR-4656. Transfection of recombinant HDAC11 partially rescued the inhibition of cell proliferation and increase of cell apoptosis inducing by knockdown of ST8SIA6-AS1. Conclusion In conclusion, our findings suggested that ST8SIA6-AS1 was a novel upregulated lncRNA in HCC and could facilitate cell proliferation and resistance to cell apoptosis via sponging miR-4656 and elevation of HDAC11, which might be a promising biomarker for patients with HCC.
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Affiliation(s)
- Qiang Fei
- Department of Hepato-Pancreato-Biliary Surgery, The Affiliated Suzhou Hospital of Nanjing Medical University, 215001 Suzhou, China
| | - Feihong Song
- Department of Special Treatment and Liver Transplantation, Shanghai Eastern Hepatobiliary Surgery Hospital, Shanghai, 200438 China
| | - Xinwei Jiang
- Department of Hepato-Pancreato-Biliary Surgery, The Affiliated Suzhou Hospital of Nanjing Medical University, 215001 Suzhou, China
| | - Han Hong
- Department of Hepato-Pancreato-Biliary Surgery, The Affiliated Suzhou Hospital of Nanjing Medical University, 215001 Suzhou, China
| | - Xiaoyong Xu
- Department of Hepato-Pancreato-Biliary Surgery, The Affiliated Suzhou Hospital of Nanjing Medical University, 215001 Suzhou, China
| | - Zhengkang Jin
- Department of Hepato-Pancreato-Biliary Surgery, The Affiliated Suzhou Hospital of Nanjing Medical University, 215001 Suzhou, China
| | - Xiang Zhu
- Department of Hepato-Pancreato-Biliary Surgery, The Affiliated Suzhou Hospital of Nanjing Medical University, 215001 Suzhou, China
| | - Binghua Dai
- Department of Special Treatment and Liver Transplantation, Shanghai Eastern Hepatobiliary Surgery Hospital, Shanghai, 200438 China
| | - Jiamei Yang
- Department of Special Treatment and Liver Transplantation, Shanghai Eastern Hepatobiliary Surgery Hospital, Shanghai, 200438 China
| | - Chengjun Sui
- Department of Special Treatment and Liver Transplantation, Shanghai Eastern Hepatobiliary Surgery Hospital, Shanghai, 200438 China
| | - Minhui Xu
- Department of Hepato-Pancreato-Biliary Surgery, The Affiliated Suzhou Hospital of Nanjing Medical University, 215001 Suzhou, China
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Xu T, Guo P, Pi C, He Y, Yang H, Hou Y, Feng X, Jiang Q, Wei Y, Zhao L. Synergistic Effects of Curcumin and 5-Fluorouracil on the Hepatocellular Carcinoma In vivo and vitro through regulating the expression of COX-2 and NF-κB. J Cancer 2020; 11:3955-3964. [PMID: 32328199 PMCID: PMC7171506 DOI: 10.7150/jca.41783] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Accepted: 03/04/2020] [Indexed: 12/29/2022] Open
Abstract
Curcumin (CU) has shown broad anti-cancer effects. 5-fluorouracil (5-FU) has been a conventional chemotherapeutic agent for hepatocellular carcinoma. Unfortunately, the nonspecific cytotoxicity and multidrug resistance caused by long-term use limited the clinical efficacy of 5-FU. This study was aimed to investigate whether the combination of CU and 5-FU could generate synergistic effect in inhibiting the human hepatocellular carcinoma. The results of cytotoxicity test showed that compared with applying single drugs, the combination of CU and 5-FU (1:1, 1:2, 1:4, 2:1 and 4:1, mol/mol) presented stronger cytotoxicity in SMMC-7721, Bel-7402, HepG-2 and MHCC97H cells, while the combination groups are relatively insensitive to normal hepatocytes (L02). Among them, the molar ratio of 2:1 combination group showed strong synergistic effect in SMMC-7721cells. Then, western blotting assay further verified that the mechanism of the synergistic effect may be related to the inhibition of the expression of NF-κB (overall) and COX-2 protein. In addition, the synergistic effect was also validated in the xenograft mice in vivo. This research not only provides a novel and effective combination strategy for the therapy of hepatocellular carcinoma but also provides an experimental basis for the development of CU and 5-FU compound preparation.
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Affiliation(s)
- Ting Xu
- Department of Pharmaceutics, School of Pharmacy, Southwest Medical University, No. 319, Zhongshan Rd Sanduan, Jiangyang District,Luzhou, Sichuan, 646000, P.R.China
| | - Pu Guo
- Department of Pharmaceutics, School of Pharmacy, Southwest Medical University, No. 319, Zhongshan Rd Sanduan, Jiangyang District,Luzhou, Sichuan, 646000, P.R.China
| | - Chao Pi
- Department of Pharmaceutics, School of Pharmacy, Southwest Medical University, No. 319, Zhongshan Rd Sanduan, Jiangyang District,Luzhou, Sichuan, 646000, P.R.China
| | - Yingmeng He
- Department of Pharmaceutics, School of Pharmacy, Southwest Medical University, No. 319, Zhongshan Rd Sanduan, Jiangyang District,Luzhou, Sichuan, 646000, P.R.China
| | - Hongru Yang
- The Affiliated Hospital, Southwest Medical University, No.25, Taiping Street, Luzhou, Sichuan, 646000, China
- Department of Oncology, Luzhou People's Hospital, No.316, Jiugu Dadao Erduan, Luzhou, Sichuan, 646000, China
| | - Yi Hou
- Department of Pharmaceutics, School of Pharmacy, Southwest Medical University, No. 319, Zhongshan Rd Sanduan, Jiangyang District,Luzhou, Sichuan, 646000, P.R.China
| | - Xianhu Feng
- Department of Pharmaceutics, School of Pharmacy, Southwest Medical University, No. 319, Zhongshan Rd Sanduan, Jiangyang District,Luzhou, Sichuan, 646000, P.R.China
| | - Qingsheng Jiang
- School of International Education, Southwest Medical University, No.1, Xianglin Rd Yiduan, Longmatan District, Luzhou, Sichuan, 646000, China
| | - Yumeng Wei
- Department of Pharmaceutics, School of Pharmacy, Southwest Medical University, No. 319, Zhongshan Rd Sanduan, Jiangyang District,Luzhou, Sichuan, 646000, P.R.China
| | - Ling Zhao
- Department of Pharmaceutics, School of Pharmacy, Southwest Medical University, No. 319, Zhongshan Rd Sanduan, Jiangyang District,Luzhou, Sichuan, 646000, P.R.China
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Naselli F, Catanzaro I, Bellavia D, Perez A, Sposito L, Caradonna F. Role and importance of polymorphisms with respect to DNA methylation for the expression of CYP2E1 enzyme. Gene 2013; 536:29-39. [PMID: 24333271 DOI: 10.1016/j.gene.2013.11.097] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2013] [Revised: 11/10/2013] [Accepted: 11/25/2013] [Indexed: 12/26/2022]
Abstract
Different individuals possess slightly different genetic information and show genetically-determined differences in several enzyme activities due to genetic variability. Following an integrated approach, we studied the polymorphisms and methylation of sites contained in the 5' flanking region of the metabolizing enzyme CYP2E1 in correlation to its expression in both tumor and non-neoplastic liver cell lines, since to date little is known about the influence of these (epi)genetic elements in basal conditions and under induction by the specific inductor and a demethylating agent. In treated cells, reduced DNA methylation, assessed both at genomic and gene level, was not consistently associated with the increase of enzyme expression. Interestingly, the Rsa/Pst haplotype differentially influenced CYP2E1 enzyme expression. In addition, regarding the Variable Number of Tandem Repeats polymorphism, cells with A4/A4 genotype showed a greater expression inhibition (ranging from 20% to 30%) compared with others carrying the A2/A2 one, while those cells bringing A2/A3 genotype showed an increase of expression (of 25%, about). Finally, we demonstrated for the first time that the A2 and A3 CYP2E1 alleles play a more important role in the expression of the enzyme, compared with other (epi)genetic factors, since they are binding sites for trans-acting proteins.
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Affiliation(s)
- Flores Naselli
- Dipartimento di Scienze e Tecnologie Biologiche Chimiche e Farmaceutiche (STEBICEF), Sezione di Biologia Cellulare, Edificio 16, Università di Palermo, V.le delle Scienze, 90128 Palermo, Italy
| | - Irene Catanzaro
- Dipartimento di Scienze e Tecnologie Biologiche Chimiche e Farmaceutiche (STEBICEF), Sezione di Biologia Cellulare, Edificio 16, Università di Palermo, V.le delle Scienze, 90128 Palermo, Italy
| | - Daniele Bellavia
- Dipartimento di Scienze e Tecnologie Biologiche Chimiche e Farmaceutiche (STEBICEF), Sezione di Biologia Cellulare, Edificio 16, Università di Palermo, V.le delle Scienze, 90128 Palermo, Italy; Istituto Ortopedico Rizzoli, c/o Dipartimento di Biopatologia e Biotecnologie Mediche e Forensi (DIBIMEF), Università di Palermo, Via Divisi, 81, 90133 Palermo, Italy
| | - Alessandro Perez
- Dipartimento di Scienze e Tecnologie Biologiche Chimiche e Farmaceutiche (STEBICEF), Sezione di Biologia Cellulare, Edificio 16, Università di Palermo, V.le delle Scienze, 90128 Palermo, Italy
| | - Laura Sposito
- Dipartimento di Scienze e Tecnologie Biologiche Chimiche e Farmaceutiche (STEBICEF), Sezione di Biologia Cellulare, Edificio 16, Università di Palermo, V.le delle Scienze, 90128 Palermo, Italy
| | - Fabio Caradonna
- Dipartimento di Scienze e Tecnologie Biologiche Chimiche e Farmaceutiche (STEBICEF), Sezione di Biologia Cellulare, Edificio 16, Università di Palermo, V.le delle Scienze, 90128 Palermo, Italy.
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Shaker GH, Melake NA. Use of the single cell gel electrophoresis (comet assay) for comparing apoptotic effect of conventional antibodies versus nanobodies. Saudi Pharm J 2012; 20:221-7. [PMID: 23960797 PMCID: PMC3745001 DOI: 10.1016/j.jsps.2011.11.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2011] [Accepted: 11/24/2011] [Indexed: 12/19/2022] Open
Abstract
The large molecular size of antibodies is considered one major factor preventing them from becoming more efficient therapeutically. It is well established that all camelids have unique antibodies circulating in their blood called heavy-chain antibodies (HcAbs). Unlike antibodies from other species, these HcAbs contain a single variable domain and two constant domains (CH2 and CH3). HcAbs are a novel type of immunoglobulin-like, antigen binding protein with beneficial pharmacokinetic properties that are ideally suited to targeting cellular antigens for molecular imaging or therapeutic purposes. Since the antigen-binding site of dromedary HcAb is comprised in one single domain, it was referred to as nanobody. In the present work, the different IgG subclasses from immunized camel (Camelus dromedairus) were purified employing their different affinity for protein A column (PA) and protein G column (PG). Characterization of IgG subclasses was done by using 12% SDS-PAGE under reducing conditions. Protein bands were visualized after staining with Coomassie Brilliant Blue, showing two bands at 50 kDa and 30 kDa in case of IgG1 while IgG2 and IgG3 produce only one band at 46 kDa and 43 kDa respectively. The induction of apoptosis by either conventional or nanobodies was evaluated on two different cell lines, Colon and Hepatic cancer cell (HCT116 and HepG2), using the comet assay. Induced apoptosis were confirmed by visualizing DNA fragmentation bands on 2% agarose gel, and the gel was photographed under UV light. This study demonstrates the successful targeting of human cancer colon cell lines by nanobodies in vitro. It may open perspectives for their future use as tumor target vehicle, due to their small size, soluble behavior and they interact with epitopes that are less antigenic for conventional antibodies.
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Affiliation(s)
- Ghada H. Shaker
- Department of Microbiology and Immunology, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
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