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Nechay M, Wang D, Kleiner RE. Inhibition of nucleolar transcription by oxaliplatin involves ATM/ATR kinase signaling. Cell Chem Biol 2023; 30:906-919.e4. [PMID: 37433295 PMCID: PMC10529435 DOI: 10.1016/j.chembiol.2023.06.010] [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: 05/06/2022] [Revised: 03/25/2023] [Accepted: 06/13/2023] [Indexed: 07/13/2023]
Abstract
Platinum (Pt) compounds are an important class of anti-cancer therapeutics, but outstanding questions remain regarding their mechanism of action. Here, we demonstrate that oxaliplatin, a Pt drug used to treat colorectal cancer, inhibits rRNA transcription through ATM and ATR signaling, and induces DNA damage and nucleolar disruption. We show that oxaliplatin causes nucleolar accumulation of the nucleolar DNA damage response proteins (n-DDR) NBS1 and TOPBP1; however transcriptional inhibition does not depend upon NBS1 or TOPBP1, nor does oxaliplatin induce substantial amounts of nucleolar DNA damage, distinguishing the nucleolar response from previously characterized n-DDR pathways. Taken together, our work indicates that oxaliplatin induces a distinct ATM and ATR signaling pathway that functions to inhibit Pol I transcription in the absence of direct nucleolar DNA damage, demonstrating how nucleolar stress and transcriptional silencing can be linked to DNA damage signaling and highlighting an important mechanism of Pt drug cytotoxicity.
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Affiliation(s)
- Misha Nechay
- Department of Chemistry, Princeton University, Princeton, NJ 08544, USA
| | - Danyang Wang
- Department of Chemistry, Princeton University, Princeton, NJ 08544, USA
| | - Ralph E Kleiner
- Department of Chemistry, Princeton University, Princeton, NJ 08544, USA.
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2
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Nechay M, Kleiner RE. Oxaliplatin Inhibits RNA Polymerase I via DNA Damage Signaling Targeted to the Nucleolus. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.04.02.535301. [PMID: 37066425 PMCID: PMC10103995 DOI: 10.1101/2023.04.02.535301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/18/2023]
Abstract
Platinum (Pt) compounds are an important class of anti-cancer therapeutics, but outstanding questions remain regarding their mode of action. In particular, emerging evidence indicates that oxaliplatin, a Pt drug used to treat colorectal cancer, kills cells by inducing ribosome biogenesis stress rather than through DNA damage generation, but the underlying mechanism is unknown. Here, we demonstrate that oxaliplatin-induced ribosomal RNA (rRNA) transcriptional silencing and nucleolar stress occur downstream of DNA damage signaling involving ATM and ATR. We show that NBS1 and TOPBP1, two proteins involved in the nucleolar DNA damage response (n-DDR), are recruited to nucleoli upon oxaliplatin treatment. However, we find that rRNA transcriptional inhibition by oxaliplatin does not depend upon NBS1 or TOPBP1, nor does oxaliplatin induce substantial amounts of nucleolar DNA damage, distinguishing it from previously characterized n-DDR pathways. Taken together, our work indicates that oxaliplatin induces a distinct DDR signaling pathway that functions in trans to inhibit Pol I transcription in the nucleolus, demonstrating how nucleolar stress can be linked to DNA damage signaling and highlighting an important mechanism of Pt drug cytotoxicity.
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3
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Asadi MR, Moslehian MS, Sabaie H, Poornabi M, Ghasemi E, Hassani M, Hussen BM, Taheri M, Rezazadeh M. Stress Granules in the Anti-Cancer Medications Mechanism of Action: A Systematic Scoping Review. Front Oncol 2021; 11:797549. [PMID: 35004322 PMCID: PMC8739770 DOI: 10.3389/fonc.2021.797549] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Accepted: 12/08/2021] [Indexed: 12/16/2022] Open
Abstract
Stress granule (SG) formation is a well-known cellular mechanism for minimizing stress-related damage and increasing cell survival. In addition to playing a critical role in the stress response, SGs have emerged as critical mediators in human health. It seems logical that SGs play a key role in cancer cell formation, development, and metastasis. Recent studies have shown that many SG components contribute to the anti-cancer medications' responses through tumor-associated signaling pathways and other mechanisms. SG proteins are known for their involvement in the translation process, control of mRNA stability, and capacity to function in both the cytoplasm and nucleus. The current systematic review aimed to include all research on the impact of SGs on the mechanism of action of anti-cancer medications and was conducted using a six-stage methodological framework and the PRISMA guideline. Prior to October 2021, a systematic search of seven databases for eligible articles was performed. Following the review of the publications, the collected data were subjected to quantitative and qualitative analysis. Notably, Bortezomib, Sorafenib, Oxaliplatin, 5-fluorouracil, Cisplatin, and Doxorubicin accounted for the majority of the medications examined in the studies. Overall, this systematic scoping review attempts to demonstrate and give a complete overview of the function of SGs in the mechanism of action of anti-cancer medications by evaluating all research.
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Affiliation(s)
- Mohammad Reza Asadi
- Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran
| | | | - Hani Sabaie
- Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Marziye Poornabi
- Student Research Committee, School of Medicine, Shahroud University of Medical Science, Shahroud, Iran
| | - Elham Ghasemi
- Department of Molecular Medicine and Biotechnology, Faculty of Medicine, Arak University of Medical Sciences, Arak, Iran
| | - Mehdi Hassani
- Student Research Committee, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
| | - Bashdar Mahmud Hussen
- Department of Pharmacognosy, College of Pharmacy, Hawler Medical University, Erbil, Iraq
| | - Mohammad Taheri
- Skull Base Research Center, Loghman Hakim Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
- Institute of Human Genetics, Jena University Hospital, Jena, Germany
| | - Maryam Rezazadeh
- Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran
- Clinical Research Development Unit of Tabriz Valiasr Hospital, Tabriz University of Medical Sciences, Tabriz, Iran
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4
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Jeon J, Lee S, Kim H, Kang H, Youn H, Jo S, Youn B, Kim HY. Revisiting Platinum-Based Anticancer Drugs to Overcome Gliomas. Int J Mol Sci 2021; 22:ijms22105111. [PMID: 34065991 PMCID: PMC8151298 DOI: 10.3390/ijms22105111] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Revised: 05/08/2021] [Accepted: 05/10/2021] [Indexed: 12/12/2022] Open
Abstract
Although there are many patients with brain tumors worldwide, there are numerous difficulties in overcoming brain tumors. Among brain tumors, glioblastoma, with a 5-year survival rate of 5.1%, is the most malignant. In addition to surgical operations, chemotherapy and radiotherapy are generally performed, but the patients have very limited options. Temozolomide is the most commonly prescribed drug for patients with glioblastoma. However, it is difficult to completely remove the tumor with this drug alone. Therefore, it is necessary to discuss the potential of anticancer drugs, other than temozolomide, against glioblastomas. Since the discovery of cisplatin, platinum-based drugs have become one of the leading chemotherapeutic drugs. Although many studies have reported the efficacy of platinum-based anticancer drugs against various carcinomas, studies on their effectiveness against brain tumors are insufficient. In this review, we elucidated the anticancer effects and advantages of platinum-based drugs used in brain tumors. In addition, the cases and limitations of the clinical application of platinum-based drugs are summarized. As a solution to overcome these obstacles, we emphasized the potential of a novel approach to increase the effectiveness of platinum-based drugs.
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Affiliation(s)
- Jaewan Jeon
- Department of Radiation Oncology, Haeundae Paik Hospital, Inje University School of Medicine, Busan 48108, Korea; (J.J.); (S.J.)
| | - Sungmin Lee
- Department of Integrated Biological Science, Pusan National University, Busan 46241, Korea; (S.L.); (H.K.); (H.K.)
| | - Hyunwoo Kim
- Department of Integrated Biological Science, Pusan National University, Busan 46241, Korea; (S.L.); (H.K.); (H.K.)
| | - Hyunkoo Kang
- Department of Integrated Biological Science, Pusan National University, Busan 46241, Korea; (S.L.); (H.K.); (H.K.)
| | - HyeSook Youn
- Department of Integrative Bioscience and Biotechnology, Sejong University, Seoul 05006, Korea;
| | - Sunmi Jo
- Department of Radiation Oncology, Haeundae Paik Hospital, Inje University School of Medicine, Busan 48108, Korea; (J.J.); (S.J.)
| | - BuHyun Youn
- Department of Integrated Biological Science, Pusan National University, Busan 46241, Korea; (S.L.); (H.K.); (H.K.)
- Department of Biological Sciences, Pusan National University, Busan 46241, Korea
- Correspondence: (B.Y.); (H.Y.K.); Tel.: +82-51-510-2264 (B.Y.); +82-51-797-3923 (H.Y.K.)
| | - Hae Yu Kim
- Department of Neurosurgery, Haeundae Paik Hospital, Inje University School of Medicine, Busan 48108, Korea
- Correspondence: (B.Y.); (H.Y.K.); Tel.: +82-51-510-2264 (B.Y.); +82-51-797-3923 (H.Y.K.)
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5
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Köberle B, Schoch S. Platinum Complexes in Colorectal Cancer and Other Solid Tumors. Cancers (Basel) 2021; 13:cancers13092073. [PMID: 33922989 PMCID: PMC8123298 DOI: 10.3390/cancers13092073] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 04/22/2021] [Accepted: 04/23/2021] [Indexed: 12/25/2022] Open
Abstract
Simple Summary Cisplatin is successfully used for the treatment of various solid cancers. Unfortunately, it shows no activity in colorectal cancer. The resistance phenotype of colorectal cancer cells is mainly caused by alterations in p53-controlled DNA damage signaling and/or defects in the cellular mismatch repair pathway. Improvement of platinum-based chemotherapy in cisplatin-unresponsive cancers, such as colorectal cancer, might be achieved by newly designed cisplatin analogues, which retain activity in unresponsive tumor cells. Moreover, a combination of cisplatin with biochemical modulators of DNA damage signaling might sensitize cisplatin-resistant tumor cells to the drug, thus providing another strategy to improve cancer therapy. Abstract Cisplatin is one of the most commonly used drugs for the treatment of various solid neoplasms, including testicular, lung, ovarian, head and neck, and bladder cancers. Unfortunately, the therapeutic efficacy of cisplatin against colorectal cancer is poor. Various mechanisms appear to contribute to cisplatin resistance in cancer cells, including reduced drug accumulation, enhanced drug detoxification, modulation of DNA repair mechanisms, and finally alterations in cisplatin DNA damage signaling preventing apoptosis in cancer cells. Regarding colorectal cancer, defects in mismatch repair and altered p53-mediated DNA damage signaling are the main factors controlling the resistance phenotype. In particular, p53 inactivation appears to be associated with chemoresistance and poor prognosis. To overcome resistance in cancers, several strategies can be envisaged. Improved cisplatin analogues, which retain activity in resistant cancer, might be applied. Targeting p53-mediated DNA damage signaling provides another therapeutic strategy to circumvent cisplatin resistance. This review provides an overview on the DNA repair pathways involved in the processing of cisplatin damage and will describe signal transduction from cisplatin DNA lesions, with special attention given to colorectal cancer cells. Furthermore, examples for improved platinum compounds and biochemical modulators of cisplatin DNA damage signaling will be presented in the context of colon cancer therapy.
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Affiliation(s)
- Beate Köberle
- Department of Food Chemistry and Toxicology, Karlsruhe Institute of Technology, Adenauerring 20a, 76131 Karlsruhe, Germany
| | - Sarah Schoch
- Department of Laboratory Medicine, Lund University, Scheelevägen 2, 223 81 Lund, Sweden
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Li Q, Li J, Song S, Chen W, Shen X, Li S, Xing D. Nanoparticle-mediated tumor vaccines for personalized therapy: preparing tumor antigens in vivo or ex vivo? J Mater Chem B 2021; 9:2352-2366. [PMID: 33659970 DOI: 10.1039/d0tb02915g] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Tumor vaccines, focusing on tailoring individual tumor antigens, have gained much attention in personalized tumor therapy. Recently, breakthroughs have been made in the development of tumor vaccines thanks to the progress in nanotechnology. We will summarize nanoparticle-mediated tumor vaccines for personalized therapy in this review. ROS/heat generating nanoparticles and molecules could induce immunogenic cell death and tumor antigen release in vivo. This strategy often includes chemotherapy, radiotherapy, photodynamic therapy, photothermal therapy, magneto-thermal therapy, etc. On the other hand, ex vivo technologies have been applied for processing of tumor cells/tissues to form effective tumor antigens, in which nanotechnology has shown very good prospects in delivering tumor antigens. In in vivo and ex vivo strategies, nanotechnology also could improve the immune effect through enhancing the uptake by targeting cells, reducing therapeutic drugs/agents, further encapsulating immuno-modulatory molecules or combining with other therapy treatments. Thus, therapeutic vaccines based on nanoparticles have the potential to enhance the immune response and reduce the side effects.
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Affiliation(s)
- Qian Li
- Cancer Institute, Affiliated Hospital of Qingdao University, Qingdao, 266071, China and Qingdao Cancer Institute, Qingdao, 266071, China
| | - Jia Li
- Qingdao Cancer Institute, Qingdao, 266071, China
| | - Sha Song
- Qingdao Cancer Institute, Qingdao, 266071, China
| | - Wujun Chen
- Qingdao Cancer Institute, Qingdao, 266071, China
| | - Xin Shen
- Cancer Institute, Affiliated Hospital of Qingdao University, Qingdao, 266071, China and CP Pharmaceutical (Qingdao) Co., Ltd, Qingdao, 266426, China.
| | - Suming Li
- Institut Européen des Membranes, IEM-UMR 5635, Univ Montpellier, ENSCM,CNRS, 34095 Montpellier, France.
| | - Dongming Xing
- Cancer Institute, Affiliated Hospital of Qingdao University, Qingdao, 266071, China and Qingdao Cancer Institute, Qingdao, 266071, China and School of Life Sciences, Tsinghua University, Beijing, 100084, China.
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7
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Hu H, Wu Z, Wang C, Huang Y, Zhang J, Cai Y, Xie X, Li J, Shen C, Li W, Ling J, Xu X, Deng Y. Duration of FOLFOX Adjuvant Chemotherapy in High-Risk Stage II and Stage III Colon Cancer With Deficient Mismatch Repair. Front Oncol 2020; 10:579478. [PMID: 33344234 PMCID: PMC7747753 DOI: 10.3389/fonc.2020.579478] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Accepted: 10/28/2020] [Indexed: 12/24/2022] Open
Abstract
Background We evaluated the impact of 3 months of mFOLFOX6 adjuvant chemotherapy or surgery alone in comparison with 6 months of mFOLFOX6 on disease-free survival (DFS) in deficient mismatch repair (dMMR) colon cancer (CC) patients. Methods This retrospective study identified a cohort of patients with high-risk stage II and III dMMR CC who underwent curative surgery between May 2011 and July 2019. DFS was compared using the Kaplan-Meier survival methods and Cox proportional hazards models. Propensity-score matching was performed to reduce imbalance in baseline characteristics. Results A total of 242 dMMR CC patients were identified; 66 patients received 6 months of mFOLFOX6, 87 patients received 3 months of mFOLFOX6, and 89 patients were treated with surgery alone. The 3-year DFS rate was 72.8% in 3-month therapy group and 86.1% in 6-month therapy group, with a hazard ratio (HR) of 2.78 (95CI%, 1.18 to 6.47; P= 0.019). The difference in DFS between surgery alone group and 6-month therapy group was also observed but was nonsignificant (HR= 2.30, 95%CI, 0.99 to 5.38; P=0.054). The benefit of 6-month therapy in DFS compared with 3-month therapy group was pronounced for patients with stage III (HR=2.81, 95%CI, 1.03 to 7.67; P=0.044) but not for high-risk stage II patients. Propensity score matched analysis confirmed a DFS benefit in the 6-month therapy group. Conclusion This study suggested that a 6-month duration of mFOLFOX6 adjuvant chemotherapy in dMMR CC patients may be associated with improved DFS compared with 3-month therapy, particularly in patients with stage III. The observational nature of the study implies caution should be taken in the interpretation of these results.
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Affiliation(s)
- Huabin Hu
- Department of Gastrointestinal Surgery, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.,Department of Medical Oncology, The Sixth Affiliated Hospital of Sun Yat-sen University, Guangzhou, China.,Guangdong Institute of Gastroenterology, Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, Guangzhou, China
| | - Zehua Wu
- Department of Medical Oncology, The Sixth Affiliated Hospital of Sun Yat-sen University, Guangzhou, China.,Guangdong Institute of Gastroenterology, Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, Guangzhou, China
| | - Chao Wang
- Guangdong Institute of Gastroenterology, Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, Guangzhou, China.,Department of Pathology, The Sixth Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Yan Huang
- Guangdong Institute of Gastroenterology, Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, Guangzhou, China.,Department of Pathology, The Sixth Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Jianwei Zhang
- Department of Medical Oncology, The Sixth Affiliated Hospital of Sun Yat-sen University, Guangzhou, China.,Guangdong Institute of Gastroenterology, Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, Guangzhou, China
| | - Yue Cai
- Department of Medical Oncology, The Sixth Affiliated Hospital of Sun Yat-sen University, Guangzhou, China.,Guangdong Institute of Gastroenterology, Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, Guangzhou, China
| | - Xiaoyu Xie
- Department of Medical Oncology, The Sixth Affiliated Hospital of Sun Yat-sen University, Guangzhou, China.,Guangdong Institute of Gastroenterology, Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, Guangzhou, China
| | - Jianxia Li
- Department of Medical Oncology, The Sixth Affiliated Hospital of Sun Yat-sen University, Guangzhou, China.,Guangdong Institute of Gastroenterology, Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, Guangzhou, China
| | - Cailu Shen
- Department of Medical Oncology, The Sixth Affiliated Hospital of Sun Yat-sen University, Guangzhou, China.,Guangdong Institute of Gastroenterology, Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, Guangzhou, China
| | - Weiwei Li
- Department of Medical Oncology, The Sixth Affiliated Hospital of Sun Yat-sen University, Guangzhou, China.,Guangdong Institute of Gastroenterology, Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, Guangzhou, China
| | - Jiayu Ling
- Department of Medical Oncology, The Sixth Affiliated Hospital of Sun Yat-sen University, Guangzhou, China.,Guangdong Institute of Gastroenterology, Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, Guangzhou, China
| | - Xuehu Xu
- Department of Gastrointestinal Surgery, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Yanhong Deng
- Department of Medical Oncology, The Sixth Affiliated Hospital of Sun Yat-sen University, Guangzhou, China.,Guangdong Institute of Gastroenterology, Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, Guangzhou, China
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8
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Oh J, Xu J, Chong J, Wang D. Molecular basis of transcriptional pausing, stalling, and transcription-coupled repair initiation. BIOCHIMICA ET BIOPHYSICA ACTA-GENE REGULATORY MECHANISMS 2020; 1864:194659. [PMID: 33271312 DOI: 10.1016/j.bbagrm.2020.194659] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Revised: 11/21/2020] [Accepted: 11/23/2020] [Indexed: 12/24/2022]
Abstract
Transcription elongation by RNA polymerase II (Pol II) is constantly challenged by numerous types of obstacles that lead to transcriptional pausing or stalling. These obstacles include DNA lesions, DNA epigenetic modifications, DNA binding proteins, and non-B form DNA structures. In particular, lesion-induced prolonged transcriptional blockage or stalling leads to genome instability, cellular dysfunction, and cell death. Transcription-coupled nucleotide excision repair (TC-NER) pathway is the first line of defense that detects and repairs these transcription-blocking DNA lesions. In this review, we will first summarize the recent research progress toward understanding the molecular basis of transcriptional pausing and stalling by different kinds of obstacles. We will then discuss new insights into Pol II-mediated lesion recognition and the roles of CSB in TC-NER.
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Affiliation(s)
- Juntaek Oh
- Division of Pharmaceutical Sciences, Skaggs School of Pharmacy & Pharmaceutical Sciences; University of California, San Diego, La Jolla, CA 92093, United States
| | - Jun Xu
- Division of Pharmaceutical Sciences, Skaggs School of Pharmacy & Pharmaceutical Sciences; University of California, San Diego, La Jolla, CA 92093, United States
| | - Jenny Chong
- Division of Pharmaceutical Sciences, Skaggs School of Pharmacy & Pharmaceutical Sciences; University of California, San Diego, La Jolla, CA 92093, United States
| | - Dong Wang
- Division of Pharmaceutical Sciences, Skaggs School of Pharmacy & Pharmaceutical Sciences; University of California, San Diego, La Jolla, CA 92093, United States; Department of Cellular and Molecular Medicine, University of California, San Diego, La Jolla, CA 92093, United States; Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA 92093, United States.
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10
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Noordhuis P, Laan AC, van de Born K, Honeywell RJ, Peters GJ. Coexisting Molecular Determinants of Acquired Oxaliplatin Resistance in Human Colorectal and Ovarian Cancer Cell Lines. Int J Mol Sci 2019; 20:ijms20153619. [PMID: 31344863 PMCID: PMC6696456 DOI: 10.3390/ijms20153619] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Revised: 07/05/2019] [Accepted: 07/19/2019] [Indexed: 02/06/2023] Open
Abstract
Oxaliplatin (OHP) treatment of colorectal cancer (CRC) frequently leads to resistance. OHP resistance was induced in CRC cell lines LoVo-92 and LoVo-Li and a platinum-sensitive ovarian cancer cell line, A2780, and related to cellular platinum accumulation, platinum-DNA adducts, transporter expression, DNA repair genes, gene expression arrays, and array-CGH profiling. Pulse (4 h, 4OHP) and continuous exposure (72 h, cOHP) resulted in 4.0 to 7.9-fold and 5.0 to 11.8-fold drug resistance, respectively. Cellular oxaliplatin accumulation and DNA-adduct formation were decreased and related to OCT1-3 and ATP7A expression. Gene expression profiling and pathway analysis showed significantly altered p53 signaling, xenobiotic metabolism, role of BRCA1 in DNA damage response, and aryl hydrocarbon receptor signaling pathways, were related to decreased ALDH1L2, Bax, and BBC3 (PUMA) and increased aldo-keto reductases C1 and C3. The array-CGH profiles showed focal aberrations. In conclusion, OHP resistance was correlated with total platinum accumulation and OCT1-3 expression, decreased proapoptotic, and increased anti-apoptosis and homologous repair genes.
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Affiliation(s)
- Paul Noordhuis
- Department of 1Medical Oncology, Amsterdam UMC, Location VU University Medical Center (VUmc), CCA 1.52, De Boelelaan 1117, 1081 HV Amsterdam, The Netherlands
| | - Adrianus C Laan
- Department of 1Medical Oncology, Amsterdam UMC, Location VU University Medical Center (VUmc), CCA 1.52, De Boelelaan 1117, 1081 HV Amsterdam, The Netherlands
| | - Kasper van de Born
- Department of 1Medical Oncology, Amsterdam UMC, Location VU University Medical Center (VUmc), CCA 1.52, De Boelelaan 1117, 1081 HV Amsterdam, The Netherlands
| | - Richard J Honeywell
- Department of 1Medical Oncology, Amsterdam UMC, Location VU University Medical Center (VUmc), CCA 1.52, De Boelelaan 1117, 1081 HV Amsterdam, The Netherlands
| | - Godefridus J Peters
- Department of 1Medical Oncology, Amsterdam UMC, Location VU University Medical Center (VUmc), CCA 1.52, De Boelelaan 1117, 1081 HV Amsterdam, The Netherlands.
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11
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Gupta D, Heinen CD. The mismatch repair-dependent DNA damage response: Mechanisms and implications. DNA Repair (Amst) 2019; 78:60-69. [PMID: 30959407 DOI: 10.1016/j.dnarep.2019.03.009] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Revised: 02/25/2019] [Accepted: 03/16/2019] [Indexed: 12/22/2022]
Abstract
An important role for the DNA mismatch repair (MMR) pathway in maintaining genomic stability is embodied in its conservation through evolution and the link between loss of MMR function and tumorigenesis. The latter is evident as inheritance of mutations within the major MMR genes give rise to the cancer predisposition condition, Lynch syndrome. Nonetheless, how MMR loss contributes to tumorigenesis is not completely understood. In addition to preventing the accumulation of mutations, MMR also directs cellular responses, such as cell cycle checkpoint or apoptosis activation, to different forms of DNA damage. Understanding this MMR-dependent DNA damage response may provide insight into the full tumor suppressing capabilities of the MMR pathway. Here, we delve into the proposed mechanisms for the MMR-dependent response to DNA damaging agents. We discuss how these pre-clinical findings extend to the clinical treatment of cancers, emphasizing MMR status as a crucial variable in selection of chemotherapeutic regimens. Also, we discuss how loss of the MMR-dependent damage response could promote tumorigenesis via the establishment of a survival advantage to endogenous levels of stress in MMR-deficient cells.
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Affiliation(s)
- Dipika Gupta
- Center for Molecular Oncology, UConn Health, Farmington, CT 06030, USA
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12
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Kim G, Kim J, Han SY, Hwang IG, Kim HS, Min H. The effects of BRCA1 expression on the chemosensitivity of gastric cancer cells to platinum agents. Oncol Lett 2019; 17:5023-5029. [PMID: 31186713 PMCID: PMC6507359 DOI: 10.3892/ol.2019.10169] [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: 08/27/2018] [Accepted: 02/20/2019] [Indexed: 01/30/2023] Open
Abstract
Breast cancer type 1 susceptibility protein (BRCA1) is a tumor suppressor gene that encodes a nuclear phosphoprotein, which is involved in homologous recombination to repair DNA double strand breaks and maintain genome stability. When BRCA1 is mutated or altered, DNA damage may not be effectively repaired, which leads to DNA replication errors and cancer growth. Accordingly, people carrying a mutation in the BRCA1 gene possess an increased risk of several types of cancer, including breast and ovarian cancer. Previous clinical studies have reported an association between BRCA1 expression level and the incidence of gastric cancer; however, to the best of our knowledge, an in vitro study has not been performed to support these clinical observations. Therefore, the present study evaluated BRCA1 expression levels in gastric cancer cell lines. In addition, the IC50 values of cisplatin and oxaliplatin in each cell line were determined to investigate a potential correlation between BRCA1 expression level and chemosensitivity to platinum agents. The present results revealed that the BRCA1 expression level in gastric cancer is variable and associated with the treatment response to platinum-based chemotherapy. This suggests that BRCA1 may serve as a therapeutic marker for platinum-based chemotherapy in gastric cancer.
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Affiliation(s)
- Geon Kim
- College of Pharmacy, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Jisu Kim
- College of Pharmacy, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Su-Young Han
- College of Pharmacy, Chung-Ang University, Seoul 06974, Republic of Korea
| | - In Gyu Hwang
- Department of Internal Medicine, College of Medicine, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Hee Sung Kim
- Department of Pathology, College of Medicine, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Hyeyoung Min
- College of Pharmacy, Chung-Ang University, Seoul 06974, Republic of Korea
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13
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Structural basis for the bypass of the major oxaliplatin-DNA adducts by human DNA polymerase η. Biochem J 2019; 476:747-758. [PMID: 30709915 PMCID: PMC6657808 DOI: 10.1042/bcj20180848] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Revised: 01/23/2019] [Accepted: 02/01/2019] [Indexed: 02/07/2023]
Abstract
Oxaliplatin, together with cisplatin, is among the most important drugs used in cancer chemotherapy. Oxaliplatin, which contains a bulky diaminocyclohexane (DACH) moiety, kills cancer cells mainly by producing (DACH)Pt-GpG intrastrand cross-links that impede transcription. The Pt-GpG tolerance by translesion DNA synthesis (TLS) polymerases contributes to the resistance of tumors to platinum-based chemotherapy. In particular, human DNA polymerase η (Polη) readily bypasses Pt-GpG adducts. While many structural studies have addressed how TLS polymerases interact with cisplatin-DNA adducts, a structure of DNA polymerase in complex with oxaliplatin-DNA adducts has not been reported, limiting our understanding of bypass of the bulky (DACH)Pt-GpG lesion by TLS polymerases. Herein, we report the first structure of DNA polymerase bound to oxaliplatinated DNA. We determined a crystal structure of Polη incorporating dCTP opposite the 3'G of the (DACH)Pt-GpG, which provides insights into accurate, efficient bypass of the oxaliplatin-GpG adducts by TLS polymerases. In the catalytic site of Polη, the 3'G of the (DACH)Pt-GpG formed three Watson-Crick hydrogen bonds with incoming dCTP and the primer terminus 3'-OH was optimally positioned for nucleotidyl transfer. To accommodate the bulky (DACH)Pt-GpG lesion, the Val59-Trp64 loop in the finger domain of Polη shifted from the positions observed in the corresponding Polη-cisplatin-GpG and undamaged structures, suggesting that the flexibility of the Val59-Trp64 loop allows the enzyme's bypass of the (DACH)Pt-GpG adducts. Overall, the Polη-oxaliplatin-GpG structure provides a structural basis for TLS-mediated bypass of the major oxaliplatin-DNA adducts and insights into resistance to platinum-based chemotherapy in humans.
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The interactions of novel mononuclear platinum-based complexes with DNA. BMC Cancer 2018; 18:1284. [PMID: 30577821 PMCID: PMC6303901 DOI: 10.1186/s12885-018-5194-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Accepted: 12/06/2018] [Indexed: 12/30/2022] Open
Abstract
Background Cisplatin has been widely used for the treatment of cancer and its antitumour activity is attributed to its capacity to form DNA adducts, predominantly at guanine residues, which impede cellular processes such as DNA replication and transcription. However, there are associated toxicity and drug resistance issues which plague its use. This has prompted the development and screening of a range of chemotherapeutic drug analogues towards improved efficacy. The biological properties of three novel platinum-based compounds consisting of varying cis-configured ligand groups, as well as a commercially supplied compound, were characterised in this study to determine their potential as anticancer agents. Methods The linear amplification reaction was employed, in conjunction with capillary electrophoresis, to quantify the sequence specificity of DNA adducts induced by these compounds using a DNA template containing telomeric repeat sequences. Additionally, the DNA interstrand cross-linking and unwinding efficiency of these compounds were assessed through the application of denaturing and native agarose gel electrophoresis techniques, respectively. Their cytotoxicity was determined in HeLa cells using a colorimetric cell viability assay. Results All three novel platinum-based compounds were found to induce DNA adduct formation at the tandem telomeric repeat sequences. The sequence specificity profile at these sites was characterised and these were distinct from that of cisplatin. Two of these compounds with the enantiomeric 1,2-diaminocyclopentane ligand (SS and RR-DACP) were found to induce a greater degree of DNA unwinding than cisplatin, but exhibited marginally lower DNA cross-linking efficiencies. Furthermore, the RR-isomer was more cytotoxic in HeLa cells than cisplatin. Conclusions The biological characteristics of these compounds were assessed relative to cisplatin, and a variation in the sequence specificity and a greater capacity to induce DNA unwinding was observed. These compounds warrant further investigations towards developing more efficient chemotherapeutic drugs.
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Hosnedlova B, Kepinska M, Skalickova S, Fernandez C, Ruttkay-Nedecky B, Peng Q, Baron M, Melcova M, Opatrilova R, Zidkova J, Bjørklund G, Sochor J, Kizek R. Nano-selenium and its nanomedicine applications: a critical review. Int J Nanomedicine 2018; 13:2107-2128. [PMID: 29692609 PMCID: PMC5901133 DOI: 10.2147/ijn.s157541] [Citation(s) in RCA: 285] [Impact Index Per Article: 47.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Traditional supplements of selenium generally have a low degree of absorption and increased toxicity. Therefore, it is imperative to develop innovative systems as transporters of selenium compounds, which would raise the bioavailability of this element and allow its controlled release in the organism. Nanoscale selenium has attracted a great interest as a food additive especially in individuals with selenium deficiency, but also as a therapeutic agent without significant side effects in medicine. This review is focused on the incorporation of nanotechnological applications, in particular exploring the possibilities of a more effective way of administration, especially in selenium-deficient organisms. In addition, this review summarizes the survey of knowledge on selenium nanoparticles, their biological effects in the organism, advantages, absorption mechanisms, and nanotechnological applications for peroral administration.
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Affiliation(s)
- Bozena Hosnedlova
- Department of Viticulture and Enology, Faculty of Horticulture, Mendel University in Brno, Lednice, Czech Republic
| | - Marta Kepinska
- Department of Biomedical and Environmental Analyses, Faculty of Pharmacy, Wroclaw Medical University, Wroclaw, Poland
| | - Sylvie Skalickova
- Central Laboratory, Faculty of Pharmacy, University of Veterinary and Pharmaceutical Sciences Brno, Brno, Czech Republic
| | - Carlos Fernandez
- School of Pharmacy and Life Sciences, Robert Gordon University, Aberdeen, UK
| | - Branislav Ruttkay-Nedecky
- Central Laboratory, Faculty of Pharmacy, University of Veterinary and Pharmaceutical Sciences Brno, Brno, Czech Republic
| | - Qiuming Peng
- State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, People's Republic of China
| | - Mojmir Baron
- Department of Viticulture and Enology, Faculty of Horticulture, Mendel University in Brno, Lednice, Czech Republic
| | - Magdalena Melcova
- Department of Biochemistry and Microbiology, University of Chemistry and Technology, Prague, Czech Republic
| | - Radka Opatrilova
- Central Laboratory, Faculty of Pharmacy, University of Veterinary and Pharmaceutical Sciences Brno, Brno, Czech Republic
| | - Jarmila Zidkova
- Department of Biochemistry and Microbiology, University of Chemistry and Technology, Prague, Czech Republic
| | - Geir Bjørklund
- Council for Nutritional and Environmental Medicine, Rana, Norway
| | - Jiri Sochor
- Department of Viticulture and Enology, Faculty of Horticulture, Mendel University in Brno, Lednice, Czech Republic
| | - Rene Kizek
- Department of Biomedical and Environmental Analyses, Faculty of Pharmacy, Wroclaw Medical University, Wroclaw, Poland.,Central Laboratory, Faculty of Pharmacy, University of Veterinary and Pharmaceutical Sciences Brno, Brno, Czech Republic
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Liu Y, Yue C, Li J, Wu J, Wang S, Sun D, Guo Y, Lin Z, Zhang D, Wang R. Enhancement of cisplatin cytotoxicity by Retigeric acid B involves blocking DNA repair and activating DR5 in prostate cancer cells. Oncol Lett 2017; 15:2871-2880. [PMID: 29435013 PMCID: PMC5778852 DOI: 10.3892/ol.2017.7664] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Accepted: 11/10/2017] [Indexed: 02/07/2023] Open
Abstract
Retigeric acid B (RAB), a natural compound isolated from lichen, has been demonstrated to inhibit cell growth and promote apoptosis in prostate cancer (PCa) cells. The present study evaluated the function of RAB combined with clinical chemotherapeutic drugs in PCa cell lines by MTT assay, reverse transcription quantitative polymerase chain reaction and western blot analysis, and identified that RAB at low doses produced significant synergistic cytotoxicity in combination with cisplatin (CDDP); however, no marked synergism between RAB and the other chemotherapeutics was observed. Additional studies revealed that RAB exerted an inhibitory effect on DNA damage repair pathways, including the nucleotide excision repair and mismatch repair pathways, which are involved in the sensitivity to CDDP-based chemotherapy, as suggested by the significantly downregulated expression of certain associated repair proteins. Notably, Excision repair cross-complementing 1, a critical gene in the nucleotide excision repair pathway, exhibited the most significant decrease. When combined with CDDP, RAB-mediated impairment of DNA repair resulted in prolonged DNA damage, as demonstrated by the long-lasting appearance of phosphorylation of histone H2AX at Ser139, which potentially enhanced the chemosensitivity to CDDP. Concurrently, the proapoptotic protein death receptor 5 (DR5) was activated by RAB, which also enhanced the chemotherapeutic response of CDDP. Knockdown of DR5 partially blocked RAB-CDDP synergism, suggesting the crucial involvement of DR5 in this event. The results of the present study identified that RAB functioned synergistically with CDDP to increase the efficacy of CDDP by inhibiting DNA damage repair and activating DR5, suggesting the mechanistic basis for the antitumor effect of RAB in combination with current chemotherapeutics.
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Affiliation(s)
- Yongqing Liu
- Department of Pharmacy, The Second Hospital of Shandong University, Jinan, Shandong 250033, P.R. China
| | - Chunwen Yue
- Department of Pharmacy, The Second Hospital of Shandong University, Jinan, Shandong 250033, P.R. China
| | - Juan Li
- Department of Pharmacy, The Second Hospital of Shandong University, Jinan, Shandong 250033, P.R. China
| | - Jing Wu
- Department of Pharmacy, The Second Hospital of Shandong University, Jinan, Shandong 250033, P.R. China
| | - Shikang Wang
- Department of Emergency Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong 250021, P.R. China
| | - Deqing Sun
- Department of Pharmacy, The Second Hospital of Shandong University, Jinan, Shandong 250033, P.R. China
| | - Yanxia Guo
- Central Research Laboratory, The Second Hospital of Shandong University, Jinan, Shandong 250033, P.R. China
| | - Zhaomin Lin
- Central Research Laboratory, The Second Hospital of Shandong University, Jinan, Shandong 250033, P.R. China
| | - Denglu Zhang
- Department of Urology Surgery, The Second Hospital of Shandong University, Jinan, Shandong 250033, P.R. China
| | - Rongmei Wang
- Department of Pharmacy, The Second Hospital of Shandong University, Jinan, Shandong 250033, P.R. China
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Cruz IN, Coley HM, Kramer HB, Madhuri TK, Safuwan NAM, Angelino AR, Yang M. Proteomics Analysis of Ovarian Cancer Cell Lines and Tissues Reveals Drug Resistance-associated Proteins. Cancer Genomics Proteomics 2017; 14:35-51. [PMID: 28031236 PMCID: PMC5267499 DOI: 10.21873/cgp.20017] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2016] [Revised: 10/16/2016] [Accepted: 10/20/2016] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Carboplatin and paclitaxel form the cornerstone of chemotherapy for epithelial ovarian cancer, however, drug resistance to these agents continues to present challenges. Despite extensive research, the mechanisms underlying this resistance remain unclear. MATERIALS AND METHODS A 2D-gel proteomics method was used to analyze protein expression levels of three human ovarian cancer cell lines and five biopsy samples. Representative proteins identified were validated via western immunoblotting. Ingenuity pathway analysis revealed metabolomic pathway changes. RESULTS A total of 189 proteins were identified with restricted criteria. Combined treatment targeting the proteasome-ubiquitin pathway resulted in re-sensitisation of drug-resistant cells. In addition, examination of five surgical biopsies of ovarian tissues revealed α-enolase (ENOA), elongation factor Tu, mitochondrial (EFTU), glyceraldehyde-3-phosphate dehydrogenase (G3P), stress-70 protein, mitochondrial (GRP75), apolipoprotein A-1 (APOA1), peroxiredoxin (PRDX2) and annexin A (ANXA) as candidate biomarkers of drug-resistant disease. CONCLUSION Proteomics combined with pathway analysis provided information for an effective combined treatment approach overcoming drug resistance. Analysis of cell lines and tissues revealed potential prognostic biomarkers for ovarian cancer.
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Affiliation(s)
- Isa N Cruz
- Department of Pharmaceutical & Biological Chemistry, UCL School of Pharmacy, London, U.K
| | - Helen M Coley
- Faculty of Health and Medical Sciences, University of Surrey, Guildford, Surrey, U.K
| | - Holger B Kramer
- Department of Physiology, Anatomy and Genetic, University of Oxford, South Parks Road, Oxford, U.K
| | - Thumuluru Kavitah Madhuri
- Faculty of Health and Medical Sciences, University of Surrey, Guildford, Surrey, U.K
- Section of Gynaecological Oncology, Royal Surrey County Hospital, Guildford, Surrey, U.K
| | - Nur A M Safuwan
- Faculty of Health and Medical Sciences, University of Surrey, Guildford, Surrey, U.K
| | - Ana Rita Angelino
- Department of Pharmaceutical & Biological Chemistry, UCL School of Pharmacy, London, U.K
| | - Min Yang
- Department of Pharmaceutical & Biological Chemistry, UCL School of Pharmacy, London, U.K.
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Wang Z, Wu M, Gou S. Toward a better understanding of the oxaliplatin mode of action upon the steric hindrance of 1,2-diaminocyclohexane and its analogue. J Inorg Biochem 2016; 157:1-7. [DOI: 10.1016/j.jinorgbio.2016.01.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2015] [Revised: 12/29/2015] [Accepted: 01/07/2016] [Indexed: 01/12/2023]
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Wallerek S, Sørensen JB. Biomarkers for efficacy of adjuvant chemotherapy following complete resection in NSCLC stages I-IIIA. Eur Respir Rev 2016; 24:340-55. [PMID: 26028645 PMCID: PMC9487808 DOI: 10.1183/16000617.00005814] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Biomarkers may be useful when deciding which nonsmall cell lung cancer (NSCLC) patients may benefit from adjuvant chemotherapy following complete resection and which chemotherapeutic agents may be used preferably in individual patients in order to maximise survival. A literature search covering the period from 2003 to May, 2014 was conducted using PubMed and the following search terms: “non-small cell lung cancer”, “NSCLC”, “adjuvant chemotherapy”, “randomized”, “randomised”, “biomarkers”, “prognostic”, “predictive”. This review focuses on current knowledge of biomarkers for prognosis or efficacy of adjuvant treatment following complete resection in stage I–IIIA NSCLC patients. This review includes results on 18 different biomarkers and five gene profiles. A statistically significant prognostic impact was reported for: iNTR, TUBB3, RRM1, ERCC1, BRCA1, p53, MRP2, MSH2, TS, mucin, BAG-1, pERK1/2, pAkt-1, microRNA, TopIIA, 15-gene profile, 92-gene profile, 31-gene profile and 14-gene profile. A statistically significant predictive impact was reported for: ERCC1, p53, MSH2, p27, TUBB3, PARP1, ATM, 37-gene profile, 31-gene profile, 15-gene profile and 92-gene profile. Uncertainties regarding the optimal analysis method and cut-off levels for the individual markers may blur the prognostic or predictive signals. None of the possible predictive markers have been validated in prospective trials. Thus, there are no biomarkers ready to use in an adjuvant setting in NSCLC. Further investigation and validation is required to explore biomarkers in completely resected NSCLC stage I–IIIAhttp://ow.ly/M0leE
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Affiliation(s)
- Sandra Wallerek
- Dept of Oncology, Finsen Centre, Copenhagen University Hospital, Copenhagen, Denmark
| | - Jens Benn Sørensen
- Dept of Oncology, Finsen Centre, Copenhagen University Hospital, Copenhagen, Denmark
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Wang S, Zhang H, Scharadin TM, Zimmermann M, Hu B, Pan AW, Vinall R, Lin TY, Cimino G, Chain P, Vuyisich M, Gleasner C, Mcmurry K, Malfatti M, Turteltaub K, de Vere White R, Pan CX, Henderson PT. Molecular Dissection of Induced Platinum Resistance through Functional and Gene Expression Analysis in a Cell Culture Model of Bladder Cancer. PLoS One 2016; 11:e0146256. [PMID: 26799320 PMCID: PMC4723083 DOI: 10.1371/journal.pone.0146256] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2015] [Accepted: 12/15/2015] [Indexed: 01/24/2023] Open
Abstract
We report herein the development, functional and molecular characterization of an isogenic, paired bladder cancer cell culture model system for studying platinum drug resistance. The 5637 human bladder cancer cell line was cultured over ten months with stepwise increases in oxaliplatin concentration to generate a drug resistant 5637R sub cell line. The MTT assay was used to measure the cytotoxicity of several bladder cancer drugs. Liquid scintillation counting allowed quantification of cellular drug uptake and efflux of radiolabeled oxaliplatin and carboplatin. The impact of intracellular drug inactivation was assessed by chemical modulation of glutathione levels. Oxaliplatin- and carboplatin-DNA adduct formation and repair was measured using accelerator mass spectrometry. Resistance factors including apoptosis, growth factor signaling and others were assessed with RNAseq of both cell lines and included confirmation of selected transcripts by RT-PCR. Oxaliplatin, carboplatin, cisplatin and gemcitabine were significantly less cytotoxic to 5637R cells compared to the 5637 cells. In contrast, doxorubicin, methotrexate and vinblastine had no cell line dependent difference in cytotoxicity. Upon exposure to therapeutically relevant doses of oxaliplatin, 5637R cells had lower drug-DNA adduct levels than 5637 cells. This difference was partially accounted for by pre-DNA damage mechanisms such as drug uptake and intracellular inactivation by glutathione, as well as faster oxaliplatin-DNA adduct repair. In contrast, both cell lines had no significant differences in carboplatin cell uptake, efflux and drug-DNA adduct formation and repair, suggesting distinct resistance mechanisms for these two closely related drugs. The functional studies were augmented by RNAseq analysis, which demonstrated a significant change in expression of 83 transcripts, including 50 known genes and 22 novel transcripts. Most of the transcripts were not previously associated with bladder cancer chemoresistance. This model system and the associated phenotypic and genotypic data has the potential to identify some novel details of resistance mechanisms of clinical importance to bladder cancer.
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Affiliation(s)
- Sisi Wang
- Department of Internal Medicine, Division of Hematology and Oncology, University of California Davis, Sacramento, California, United States of America
| | - Hongyong Zhang
- Department of Internal Medicine, Division of Hematology and Oncology, University of California Davis, Sacramento, California, United States of America
| | - Tiffany M. Scharadin
- Department of Internal Medicine, Division of Hematology and Oncology, University of California Davis, Sacramento, California, United States of America
| | - Maike Zimmermann
- Department of Internal Medicine, Division of Hematology and Oncology, University of California Davis, Sacramento, California, United States of America
- Accelerated Medical Diagnostics Incorporated, Dublin, California, United States of America
| | - Bin Hu
- Los Alamos National Laboratory, Los Alamos, New Mexico, United States of America
| | - Amy Wang Pan
- Department of Internal Medicine, Division of Hematology and Oncology, University of California Davis, Sacramento, California, United States of America
| | - Ruth Vinall
- Department of Urology, University of California Davis, Sacramento, California, United States of America
| | - Tzu-yin Lin
- Department of Internal Medicine, Division of Hematology and Oncology, University of California Davis, Sacramento, California, United States of America
| | - George Cimino
- Accelerated Medical Diagnostics Incorporated, Dublin, California, United States of America
| | - Patrick Chain
- Los Alamos National Laboratory, Los Alamos, New Mexico, United States of America
| | - Momchilo Vuyisich
- Los Alamos National Laboratory, Los Alamos, New Mexico, United States of America
| | - Cheryl Gleasner
- Los Alamos National Laboratory, Los Alamos, New Mexico, United States of America
| | - Kim Mcmurry
- Los Alamos National Laboratory, Los Alamos, New Mexico, United States of America
| | - Michael Malfatti
- Lawrence Livermore National Laboratory, Livermore, California, United States of America
| | - Kenneth Turteltaub
- Lawrence Livermore National Laboratory, Livermore, California, United States of America
| | - Ralph de Vere White
- Department of Urology, University of California Davis, Sacramento, California, United States of America
| | - Chong-xian Pan
- Department of Internal Medicine, Division of Hematology and Oncology, University of California Davis, Sacramento, California, United States of America
- Department of Urology, University of California Davis, Sacramento, California, United States of America
- VA Northern California Health Care System, Mather, California, United States of America
- * E-mail: (PTH); (CXP)
| | - Paul T. Henderson
- Department of Internal Medicine, Division of Hematology and Oncology, University of California Davis, Sacramento, California, United States of America
- Accelerated Medical Diagnostics Incorporated, Dublin, California, United States of America
- * E-mail: (PTH); (CXP)
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Sawant A, Kothandapani A, Zhitkovich A, Sobol RW, Patrick SM. Role of mismatch repair proteins in the processing of cisplatin interstrand cross-links. DNA Repair (Amst) 2015; 35:126-36. [PMID: 26519826 DOI: 10.1016/j.dnarep.2015.10.003] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2015] [Revised: 10/09/2015] [Accepted: 10/10/2015] [Indexed: 12/13/2022]
Abstract
Mismatch repair (MMR) deficiency gives rise to cisplatin resistance and can lead to poor prognosis in cancers. Various models have been proposed to explain this low level of resistance caused due to loss of MMR proteins. We have shown that MMR proteins are required to maintain cisplatin interstrand cross-links (ICLs) on the DNA leading to increased cellular sensitivity. In our previous studies, we have shown that BER processing of the cisplatin ICLs is mutagenic. Polymerase β (Polβ) can generate mismatches which leads to the activation and the recruitment of mismatch repair proteins. In this paper, we distinguished between the requirement of different downstream MMR proteins for maintaining cisplatin sensitivity. We show that the MutSα (MSH2-MSH6) heterocomplex is required to maintain cisplatin sensitivity, whereas the Mutsβ complex has no effect. These results can be correlated with the increased repair of cisplatin ICLs and ICL induced DNA double strand breaks (DSBs) in the resistant cells. Moreover, we show that MLH1 proficient cells displayed a cisplatin sensitive phenotype when compared with the MLH1 deficient cells and the ATPase activity of MLH1 is essential to mediate this effect. Based on these results, we propose that MutSα as well as the downstream MMR pathway proteins are essential to maintain a cisplatin sensitive phenotype as a consequence of processing Polβ induced mismatches at sites flanking cisplatin ICLs.
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Affiliation(s)
- Akshada Sawant
- Department of Biochemistry and Cancer Biology, University of Toledo-Health Science Campus, Toledo, OH 43614, USA
| | - Anbarasi Kothandapani
- Department of Biochemistry and Cancer Biology, University of Toledo-Health Science Campus, Toledo, OH 43614, USA
| | - Anatoly Zhitkovich
- Department of Pathology and Laboratory Medicine, Alpert Medical School, Brown University, Providence, RI 02912, USA
| | - Robert W Sobol
- Department of Pharmacology & Chemical Biology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213, USA; University of Pittsburgh Cancer Institute, Hillman Cancer Center, Pittsburgh, PA 15213, USA; Department of Human Genetics, University of Pittsburgh Graduate School of Public Health, Pittsburgh, PA 15213, USA; Department of Oncologic Sciences, Molecular & Metabolic Oncology Program, University of South Alabama Mitchell Cancer Institute, 1660 Springhill Avenue, Mobile, AL 36604, USA
| | - Steve M Patrick
- Department of Oncology, Karmanos Cancer Institute, Wayne State University, Detroit, MI 48201, USA.
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Synthesis, characterization and theoretical calculations of (1,2-diaminocyclohexane)(1,3-diaminopropane)gold(III) chloride complexes: in vitro cytotoxic evaluations against human cancer cell lines. Biometals 2015; 28:827-44. [PMID: 26099502 DOI: 10.1007/s10534-015-9869-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2015] [Accepted: 06/13/2015] [Indexed: 01/04/2023]
Abstract
The gold(III) complexes of the type (1,2-diaminocyclohexane)(1,3-diaminopropane)gold(III) chloride, [(DACH)Au(pn)]Cl3, [where DACH = cis-, trans-1,2- and S,S-1,2-diaminocyclohexane and pn = 1,3-diaminopropane] have been synthesized and characterized using various spectroscopic and analytical techniques including elemental analysis, UV-Vis and FTIR spectroscopy; solution as well as solid-state NMR measurements. The solid-state (13)C NMR shows that 1,2-diaminocyclohexane (1,2-DACH) and 1,3-diaminopropane (pn) are strongly bound to the gold(III) center via N donor atoms. The stability of the mixed diamine ligand gold(III) was checked by UV-Vis spectroscopy and NMR measurements. The molecular structure of compound 1 (containing cis-1,2-DACH) was determined by X-ray diffraction analysis. The structure of 1 consists of [(cis-DACH)Au(pn)](3+) complex ion and chloride counter ions. Each gold atom in the complex ion adopts a distorted square-planar geometry. The structural details and relative stabilities of the four possible isomers of the complexes were also estimated at the B3LYP/LANL2DZ level of theoretical calculations. The computational study demonstrates that trans- conformations are slightly more stable than the cis- conformations. The antiproliferative effects and cytotoxic properties of the mixed ligand gold(III) complexes were evaluated in vitro on human gastric SGC7901 and prostate PC3 cancer cells using MTT assay. The antiproliferative study of the gold(III) complexes on PC3 and SGC7901 cells indicate that complex 3 (containing 1S,2S-(+)-1,2-(DACH)) is the most effective antiproliferative agent. The IC50 data reveal that the in vitro cytotoxicity of complex 3 against SGC7901 cancer cells manifested similar and very pronounced cytotoxic effects with respect to cisplatin. Moreover, the electrochemical behavior, and the interaction of complex 3 with two well-known model proteins, namely, hen egg white lysozyme and bovine serum albumin is also reported.
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Liu J, Zhang L, Zhang X, Xing X. Rapamycin enhanced the antitumor efficacy of oxaliplatin in cisplatin-resistant ovarian cancer cells A2780cis both in vitro and in vivo. J Chemother 2015; 27:358-64. [PMID: 25976336 DOI: 10.1179/1973947815y.0000000021] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
OBJECTIVE This study aimed to investigate the efficacy of combination of rapamycin, an mammalian target of rapamycin (mTOR) inhibitor for treating rejection after organ transplantation, and oxaliplatin, a third-generation of platinum drug usually used to treat chemoresistant or progressive ovarian cancer, in cisplatin-resistant ovarian carcinoma cells A2780cis. METHODS/MATERIALS Expressions of mTOR and its target molecules p70S6K and 4E-BP1 were determined in cisplatin-sensitive and -resistant cells A2780 and A2780cis, respectively, using Western blotting. Proliferation of A2780cis exposure to oxaliplatin or oxaliplatin plus rapamycin was examined using MTT assay in vitro as well as a nude mice model in vivo. Cell apoptosis and proapoptosis proteins including caspase-8 and -3 and PARP were determined using flow cytometry and Western blotting. RESULTS We found that A2780cis cells had partial cross-resistance between cisplatin and oxaliplatin. The levels of phosphorylated mTOR (p-mTOR), p70S6K, and 4E-BP1 were significantly increased in A2780cis cells compared to A2780 cells, which might be implicated in cisplatin-induced chemoresistance. Rapamycin obviously enhanced the inhibitory effect of oxaliplatin on the growth of A2780cis both in vitro and in vivo. Rapamycin slightly induced cell apoptosis but significantly enhanced the effect of oxaliplatin in soliciting apoptosis of A2780cis cells, which might be ascribed to its ability in further increasing the levels of cleaved caspase-8 and -3 and PARP induced by oxaliplatin. CONCLUSION These results suggested that combination of oxaliplatin and rapamycin enhanced the antitumour efficacy of oxaliplatin in A2780cis cells and therefore might have a role in treating cisplatin-resistant ovarian carcinoma.
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Affiliation(s)
- Jin Liu
- Department of Obstetrics and Gynecology, The Third People's Hospital of Liaocheng , Shandong, China
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Roco A, Cayún J, Contreras S, Stojanova J, Quiñones L. Can pharmacogenetics explain efficacy and safety of cisplatin pharmacotherapy? Front Genet 2014; 5:391. [PMID: 25452763 PMCID: PMC4231946 DOI: 10.3389/fgene.2014.00391] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2014] [Accepted: 10/25/2014] [Indexed: 12/12/2022] Open
Abstract
Several recent pharmacogenetic studies have investigated the variability in both outcome and toxicity in cisplatin-based therapies. These studies have focused on the genetic variability of therapeutic targets that could affect cisplatin response and toxicity in diverse type of cancer including lung, gastric, ovarian, testicular, and esophageal cancer. In this review, we seek to update the reader in this area of investigation, focusing primarily on DNA reparation enzymes and cisplatin metabolism through Glutathione S-Transferases (GSTs). Current evidence indicates a potential application of pharmacogenetics in therapeutic schemes in which cisplatin is the cornerstone of these treatments. Therefore, a collaborative effort is required to study these molecular characteristics in order to generate a genetic panel with clinical utility.
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Affiliation(s)
- Angela Roco
- Servicio de Salud Metropolitano Occidente Santiago, Chile ; Laboratory of Chemical Carcinogenesis and Pharmacogenetics (CQF), Molecular and Clinical Pharmacology Program, ICBM - Insituto de Ciencias Biomédicas, Faculty of Medicine, University of Chile Santiago, Chile
| | - Juan Cayún
- Laboratory of Chemical Carcinogenesis and Pharmacogenetics (CQF), Molecular and Clinical Pharmacology Program, ICBM - Insituto de Ciencias Biomédicas, Faculty of Medicine, University of Chile Santiago, Chile
| | - Stephania Contreras
- Laboratory of Chemical Carcinogenesis and Pharmacogenetics (CQF), Molecular and Clinical Pharmacology Program, ICBM - Insituto de Ciencias Biomédicas, Faculty of Medicine, University of Chile Santiago, Chile
| | - Jana Stojanova
- Laboratory of Chemical Carcinogenesis and Pharmacogenetics (CQF), Molecular and Clinical Pharmacology Program, ICBM - Insituto de Ciencias Biomédicas, Faculty of Medicine, University of Chile Santiago, Chile
| | - Luis Quiñones
- Laboratory of Chemical Carcinogenesis and Pharmacogenetics (CQF), Molecular and Clinical Pharmacology Program, ICBM - Insituto de Ciencias Biomédicas, Faculty of Medicine, University of Chile Santiago, Chile
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Kozovska Z, Gabrisova V, Kucerova L. Colon cancer: Cancer stem cells markers, drug resistance and treatment. Biomed Pharmacother 2014; 68:911-6. [DOI: 10.1016/j.biopha.2014.10.019] [Citation(s) in RCA: 157] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2014] [Accepted: 10/15/2014] [Indexed: 12/14/2022] Open
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Al-Jaroudi SS, Monim-ul-Mehboob M, Altaf M, Al-Saadi AA, Wazeer MIM, Altuwaijri S, Isab AA. Synthesis, spectroscopic characterization, electrochemical behavior and computational analysis of mixed diamine ligand gold(III) complexes: antiproliferative and in vitro cytotoxic evaluations against human cancer cell lines. Biometals 2014; 27:1115-36. [PMID: 25034122 DOI: 10.1007/s10534-014-9771-2] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2014] [Accepted: 06/26/2014] [Indexed: 12/11/2022]
Abstract
The gold(III) complexes of the type [(DACH)Au(en)]Cl3, 1,2-Diaminocyclohexane ethylenediamine gold(III) chloride [where 1,2-DACH = cis-, trans-1,2- and S,S-1,2diaminocyclohexane and en = ethylenediamine] have been synthesized and characterized using various analytical and spectroscopic techniques including elemental analysis, UV-Vis and FTIR spectra; and solution as well as solid-state NMR measurements. The solid-state (13)C NMR shows that 1,2-diaminocyclohexane (1,2-DACH) and ethylenediamine (en) are strongly bound to the gold(III) center via N donor atoms. The stability of the mixed diamine ligand gold(III) was determined by (1)H and (13)C NMR spectra. Their electrochemical behavior was studied by cyclic voltammetry. The structural details and relative stabilities of the four possible isomers of the complexes were also reported at the B3LYP/LANL2DZ level of theory. The coordination sphere of these complexes around gold(III) center adopts distorted square planar geometry. The computational study also demonstrates that trans- conformations is slightly more stable than the cis-conformations. The antiproliferative effects and cytotoxic properties of the mixed diamine ligand gold(III) complexes were evaluated in vitro on human gastric SGC7901 and prostate PC3 cancer cells using MTT assay. The antiproliferative study of the gold(III) complexes on PC3 and SGC7901 cells indicate that complex 1 is the most effective antiproliferative agent among mixed ligand based gold(III) complexes 1-3. The IC50 data reveal that the in vitro cytotoxicity of complexes 1 and 3 against SGC7901 cancer cells are fairly better than that of cisplatin.
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Affiliation(s)
- Said S Al-Jaroudi
- Department of Chemistry, King Fahd University of Petroleum and Minerals, Dhahran, 31261, Saudi Arabia
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Al-Jaroudi SS, Monim-ul-Mehboob M, Altaf M, Fettouhi M, Wazeer MIM, Altuwaijri S, Isab AA. Synthesis, spectroscopic characterization, X-ray structure and electrochemistry of new bis(1,2-diaminocyclohexane)gold(iii) chloride compounds and their anticancer activities against PC3 and SGC7901 cancer cell lines. NEW J CHEM 2014. [DOI: 10.1039/c3nj01624b] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Promising cytotoxic gold(iii) complexes with general formula [Au{(1,2-DACH)}2]Cl3 are reported.
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Affiliation(s)
- Said S. Al-Jaroudi
- Department of Chemistry
- King Fahd University of Petroleum and Minerals
- Dhahran 31261
- Saudi Arabia
| | - M. Monim-ul-Mehboob
- Department of Chemistry
- King Fahd University of Petroleum and Minerals
- Dhahran 31261
- Saudi Arabia
| | - Muhammad Altaf
- Department of Chemistry
- King Fahd University of Petroleum and Minerals
- Dhahran 31261
- Saudi Arabia
| | - Mohammed Fettouhi
- Department of Chemistry
- King Fahd University of Petroleum and Minerals
- Dhahran 31261
- Saudi Arabia
| | - Mohammed I. M. Wazeer
- Department of Chemistry
- King Fahd University of Petroleum and Minerals
- Dhahran 31261
- Saudi Arabia
| | - Saleh Altuwaijri
- Clinical Research Laboratory
- SAAD Research and Development Center
- SAAD Specialist Hospital
- Al-Khobar 31952
- Saudi Arabia
| | - Anvarhusein A. Isab
- Department of Chemistry
- King Fahd University of Petroleum and Minerals
- Dhahran 31261
- Saudi Arabia
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Kothandapani A, Sawant A, Dangeti VSMN, Sobol RW, Patrick SM. Epistatic role of base excision repair and mismatch repair pathways in mediating cisplatin cytotoxicity. Nucleic Acids Res 2013; 41:7332-43. [PMID: 23761438 PMCID: PMC3753620 DOI: 10.1093/nar/gkt479] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Base excision repair (BER) and mismatch repair (MMR) pathways play an important role in modulating cis-Diamminedichloroplatinum (II) (cisplatin) cytotoxicity. In this article, we identified a novel mechanistic role of both BER and MMR pathways in mediating cellular responses to cisplatin treatment. Cells defective in BER or MMR display a cisplatin-resistant phenotype. Targeting both BER and MMR pathways resulted in no additional resistance to cisplatin, suggesting that BER and MMR play epistatic roles in mediating cisplatin cytotoxicity. Using a DNA Polymerase β (Polβ) variant deficient in polymerase activity (D256A), we demonstrate that MMR acts downstream of BER and is dependent on the polymerase activity of Polβ in mediating cisplatin cytotoxicity. MSH2 preferentially binds a cisplatin interstrand cross-link (ICL) DNA substrate containing a mismatch compared with a cisplatin ICL substrate without a mismatch, suggesting a novel mutagenic role of Polβ in activating MMR in response to cisplatin. Collectively, these results provide the first mechanistic model for BER and MMR functioning within the same pathway to mediate cisplatin sensitivity via non-productive ICL processing. In this model, MMR participation in non-productive cisplatin ICL processing is downstream of BER processing and dependent on Polβ misincorporation at cisplatin ICL sites, which results in persistent cisplatin ICLs and sensitivity to cisplatin.
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Affiliation(s)
- Anbarasi Kothandapani
- Department of Biochemistry and Cancer Biology, University of Toledo - Health Science Campus, Toledo, OH 43614, USA, Department of Pharmacology & Chemical Biology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213, USA, University of Pittsburgh Cancer Institute, Hillman Cancer Center, Pittsburgh, PA 15213, USA and Department of Human Genetics, University of Pittsburgh Graduate School of Public Health, Pittsburgh, PA 15213, USA
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Sun Y, Liu F, Gou S, Cheng L, Fang L, Yin R. Synthesis and in vitro antiproliferative activity of platinum(II) complexes with N-monoalkyl 1R,2R-diaminocyclohexane as ligands. Eur J Med Chem 2012; 55:297-306. [DOI: 10.1016/j.ejmech.2012.07.026] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2012] [Revised: 07/12/2012] [Accepted: 07/17/2012] [Indexed: 11/17/2022]
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Sun Y, Yin R, Gou S, Zhaojian. Antitumor platinum(II) complexes of N-monoalkyl-1R, 2R-diaminocyclohexane derivatives with alkyl groups as hindrance. J Inorg Biochem 2012; 112:68-76. [DOI: 10.1016/j.jinorgbio.2012.03.003] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2011] [Revised: 02/18/2012] [Accepted: 03/09/2012] [Indexed: 11/29/2022]
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Damodaran S, Bellavia T, Sait SNJ, Wang ES, Wetzler M, Khushalani NI. Acute myeloid leukemia secondary to oxaliplatin treatment for esophageal cancer. Clin Colorectal Cancer 2011; 11:151-4. [PMID: 22133502 DOI: 10.1016/j.clcc.2011.09.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2011] [Revised: 09/01/2011] [Accepted: 09/02/2011] [Indexed: 11/30/2022]
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Predictive markers in the adjuvant therapy of non-small cell lung cancer. Lung Cancer 2011; 74:355-63. [DOI: 10.1016/j.lungcan.2011.06.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2011] [Revised: 05/30/2011] [Accepted: 06/12/2011] [Indexed: 12/30/2022]
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Perspectives for tailored chemoprevention and treatment of colorectal cancer in Lynch syndrome. Crit Rev Oncol Hematol 2011; 80:264-77. [DOI: 10.1016/j.critrevonc.2010.11.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2010] [Revised: 11/03/2010] [Accepted: 11/18/2010] [Indexed: 12/22/2022] Open
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Zaanan A, Fléjou JF, Emile JF, Des GG, Cuilliere-Dartigues P, Malka D, Lecaille C, Validire P, Louvet C, Rougier P, de Gramont A, Bonnetain F, Praz F, Taïeb J. Defective Mismatch Repair Status as a Prognostic Biomarker of Disease-Free Survival in Stage III Colon Cancer Patients Treated with Adjuvant FOLFOX Chemotherapy. Clin Cancer Res 2011; 17:7470-8. [DOI: 10.1158/1078-0432.ccr-11-1048] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Debio 0507 primarily forms diaminocyclohexane-Pt-d(GpG) and -d(ApG) DNA adducts in HCT116 cells. Cancer Chemother Pharmacol 2011; 69:665-77. [PMID: 21968950 DOI: 10.1007/s00280-011-1744-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2011] [Accepted: 09/12/2011] [Indexed: 10/17/2022]
Abstract
PURPOSE To characterize the cellular action mechanism of Debio 0507, we compared the major DNA adducts formed by Debio 0507- and oxaliplatin-treated HCT116 human colon carcinoma cells by a combination of inductively coupled plasma mass spectrometry (ICP-MS) and ultraperformance liquid chromatography mass spectrometry (UPLC-MS/MS). METHODS HCT116 cells were treated with IC(50) doses of Debio 0507 or oxaliplatin for 3 days. Total cellular Pt-DNA adducts were determined by ICP-MS. The DNA was digested, and the major Pt-DNA adducts formed by both drugs were characterized by UPLC/MS/MS essentially as described previously for cisplatin (Baskerville-Abraham et al. in Chem Res Toxicol 22:905-912, 2009). RESULTS The Pt level/deoxynucleotide was 7.4/10(4) for DNA from Debio 0507-treated cells and 5.5/10(4) for oxaliplatin-treated cells following a 3-day treatment at the IC(50) for each drug. UPLC-MS/MS in the positive ion mode confirmed the major Pt-DNA adducts formed by both drugs were dach-Pt-d(GpG) (904.2 m/z → 610 m/z and 904.2 m/z → 459 m/z) and dach-Pt-d(ApG) (888.2 m/z → 594 m/z and 888.2 m/z → 459 m/z). CONCLUSIONS These data show that the major DNA adducts formed by Debio 0507 are the dach-Pt-d(GpG) and dach-Pt-d(ApG) adducts and at equitoxic doses Debio 0507 and oxaliplatin form similar levels of dach-Pt-d(GpG) and dach-Pt-d(ApG) adducts. This suggests that the action mechanisms of Debio 0507 and oxaliplatin are similar at a cellular level.
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Bhattacharyya D, Ramachandran S, Sharma S, Pathmasiri W, King CL, Baskerville-Abraham I, Boysen G, Swenberg JA, Campbell SL, Dokholyan NV, Chaney SG. Flanking bases influence the nature of DNA distortion by platinum 1,2-intrastrand (GG) cross-links. PLoS One 2011; 6:e23582. [PMID: 21853154 PMCID: PMC3154474 DOI: 10.1371/journal.pone.0023582] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2010] [Accepted: 07/21/2011] [Indexed: 11/28/2022] Open
Abstract
The differences in efficacy and molecular mechanisms of platinum anti-cancer drugs cisplatin (CP) and oxaliplatin (OX) are thought to be partially due to the differences in the DNA conformations of the CP and OX adducts that form on adjacent guanines on DNA, which in turn influence the binding of damage-recognition proteins that control downstream effects of the adducts. Here we report a comprehensive comparison of the structural distortion of DNA caused by CP and OX adducts in the TGGT sequence context using nuclear magnetic resonance (NMR) spectroscopy and molecular dynamics (MD) simulations. When compared to our previous studies in other sequence contexts, these structural studies help us understand the effect of the sequence context on the conformation of Pt-GG DNA adducts. We find that both the sequence context and the type of Pt-GG DNA adduct (CP vs. OX) play an important role in the conformation and the conformational dynamics of Pt-DNA adducts, possibly explaining their influence on the ability of many damage-recognition proteins to bind to Pt-DNA adducts.
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Affiliation(s)
- Debadeep Bhattacharyya
- Department of Biochemistry and Biophysics, School of Medicine, University of North Carolina, Chapel Hill, North Carolina, United States of America
| | - Srinivas Ramachandran
- Department of Biochemistry and Biophysics, School of Medicine, University of North Carolina, Chapel Hill, North Carolina, United States of America
- Program in Cellular and Molecular Biophysics, University of North Carolina, Chapel Hill, North Carolina, United States of America
| | - Shantanu Sharma
- Department of Biochemistry and Biophysics, School of Medicine, University of North Carolina, Chapel Hill, North Carolina, United States of America
| | - Wimal Pathmasiri
- Department of Biochemistry and Biophysics, School of Medicine, University of North Carolina, Chapel Hill, North Carolina, United States of America
| | - Candice L. King
- Department of Biochemistry and Biophysics, School of Medicine, University of North Carolina, Chapel Hill, North Carolina, United States of America
| | - Irene Baskerville-Abraham
- Department of Environmental Sciences and Engineering, School of Public Health, University of North Carolina, Chapel Hill, North Carolina, United States of America
| | - Gunnar Boysen
- Department of Environmental Sciences and Engineering, School of Public Health, University of North Carolina, Chapel Hill, North Carolina, United States of America
| | - James A. Swenberg
- Department of Environmental Sciences and Engineering, School of Public Health, University of North Carolina, Chapel Hill, North Carolina, United States of America
- Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, North Carolina, United States of America
| | - Sharon L. Campbell
- Department of Biochemistry and Biophysics, School of Medicine, University of North Carolina, Chapel Hill, North Carolina, United States of America
- Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, North Carolina, United States of America
- * E-mail: (SLC); (NVD); (SGC)
| | - Nikolay V. Dokholyan
- Department of Biochemistry and Biophysics, School of Medicine, University of North Carolina, Chapel Hill, North Carolina, United States of America
- Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, North Carolina, United States of America
- * E-mail: (SLC); (NVD); (SGC)
| | - Stephen G. Chaney
- Department of Biochemistry and Biophysics, School of Medicine, University of North Carolina, Chapel Hill, North Carolina, United States of America
- Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, North Carolina, United States of America
- * E-mail: (SLC); (NVD); (SGC)
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Alborzinia H, Can S, Holenya P, Scholl C, Lederer E, Kitanovic I, Wölfl S. Real-time monitoring of cisplatin-induced cell death. PLoS One 2011; 6:e19714. [PMID: 21603599 PMCID: PMC3095603 DOI: 10.1371/journal.pone.0019714] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2011] [Accepted: 04/04/2011] [Indexed: 01/01/2023] Open
Abstract
Since the discovery of cisplatin more than 40 years ago and its clinical introduction in the 1970s an enormous amount of research has gone into elucidating the mechanism of action of cisplatin on tumor cells. With a novel cell biosensor chip system allowing continuous monitoring of respiration, glycolysis, and impedance we followed cisplatin treatment of different cancer cell lines in real-time. Our measurements reveal a first effect on respiration, in all cisplatin treated cell lines, followed with a significant delay by interference with glycolysis in HT-29, HCT-116, HepG2, and MCF-7 cells but not in the cisplatin-resistant cell line MDA-MB-231. Most strikingly, cell death started in all cisplatin-sensitive cell lines within 8 to 11 h of treatment, indicating a clear time frame from exposure, first response to cisplatin lesions, to cell fate decision. The time points of most significant changes were selected for more detailed analysis of cisplatin response in the breast cancer cell line MCF-7. Phosphorylation of selected signal transduction mediators connected with cellular proliferation, as well as changes in gene expression, were analyzed in samples obtained directly from sensor chips at the time points when changes in glycolysis and impedance occurred. Our online cell biosensor measurements reveal for the first time the time scale of metabolic response until onset of cell death under cisplatin treatment, which is in good agreement with models of p53-mediated cell fate decision.
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Affiliation(s)
- Hamed Alborzinia
- Institute of Pharmacy and Molecular Biotechnology, Heidelberg University, Heidelberg, Germany
| | - Suzan Can
- Institute of Pharmacy and Molecular Biotechnology, Heidelberg University, Heidelberg, Germany
| | - Pavlo Holenya
- Institute of Pharmacy and Molecular Biotechnology, Heidelberg University, Heidelberg, Germany
| | - Catharina Scholl
- Institute of Pharmacy and Molecular Biotechnology, Heidelberg University, Heidelberg, Germany
| | - Elke Lederer
- Institute of Pharmacy and Molecular Biotechnology, Heidelberg University, Heidelberg, Germany
| | - Igor Kitanovic
- Institute of Pharmacy and Molecular Biotechnology, Heidelberg University, Heidelberg, Germany
| | - Stefan Wölfl
- Institute of Pharmacy and Molecular Biotechnology, Heidelberg University, Heidelberg, Germany
- * E-mail:
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Zaanan A, Meunier K, Sangar F, Fléjou JF, Praz F. Microsatellite instability in colorectal cancer: from molecular oncogenic mechanisms to clinical implications. Cell Oncol (Dordr) 2011; 34:155-76. [PMID: 21484480 DOI: 10.1007/s13402-011-0024-x] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/13/2011] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND Microsatellite instability (MSI) constitutes an important oncogenic molecular pathway in colorectal cancer (CRC), representing approximately 15% of all colorectal malignant tumours. In roughly one third of the cases, the underlying DNA mismatch repair (MMR) defect is inherited through the transmission of a mutation in one of the genes involved in MMR, predominantly MSH2 and MLH1, or less frequently, MSH6 or PMS2. In the overwhelming number of sporadic cases, MSI results from epigenetic MLH1 silencing through hypermethylation of its promoter. MMR deficiency promotes colorectal oncogenesis through the accumulation of numerous mutations in crucial target genes harbouring mononucleotide repeats, notably in those involved in the control of cell proliferation and differentiation, as well as DNA damage signalling and repair. DESIGN In this review, we describe the molecular aspects of the MMR system and the biological consequences of its defect on the oncogenic process, and we discuss the various experimental systems used to evaluate the efficacy of cytotoxic drugs on MSI colorectal cells lines. There is increasing evidence showing that MSI CRCs differ from all CRCs in terms of prognosis and response to the treatment. We report the clinical studies that have evaluated the prognostic and predictive value of MSI status on clinical outcome in patients treated with various chemotherapy regimens used in the adjuvant setting or for advanced CRCs. CONCLUSION In view of this, the opportunity of a systematic MSI phenotyping in the clinical management of patients with CRC is further discussed.
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Affiliation(s)
- Aziz Zaanan
- INSERM, UMR_S, Centre de Recherche Saint-Antoine, Paris, France
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Martin LM, Marples B, Coffey M, Lawler M, Lynch TH, Hollywood D, Marignol L. DNA mismatch repair and the DNA damage response to ionizing radiation: Making sense of apparently conflicting data. Cancer Treat Rev 2010; 36:518-27. [PMID: 20413225 DOI: 10.1016/j.ctrv.2010.03.008] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2010] [Revised: 03/12/2010] [Accepted: 03/21/2010] [Indexed: 10/19/2022]
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Ahmad S. Platinum-DNA interactions and subsequent cellular processes controlling sensitivity to anticancer platinum complexes. Chem Biodivers 2010; 7:543-66. [PMID: 20232326 DOI: 10.1002/cbdv.200800340] [Citation(s) in RCA: 154] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Platinum-based compounds are widely used as chemotherapeutics for the treatment of a variety of cancers. The anticancer activity of cisplatin and other platinum drugs is believed to arise from their interaction with DNA. Several cellular pathways are activated in response to this interaction, which include recognition by high-mobility group and repair proteins, translesion synthesis by polymerases, and induction of apoptosis. The apoptotic process is regulated by activation of caspases, p53 gene, and several proapoptotic and antiapoptotic proteins. Such cellular processing eventually leads to an inhibition of the replication or transcription machinery of the cell. Deactivation of platinum drugs by thiols, increased nucleotide excision repair of Pt-DNA adducts, decreased mismatch repair, and defective apoptosis result in resistance to platinum therapy. The differences in cytotoxicity of various platinum complexes are attributed to the differential recognition of their adducts by cellular proteins. Cisplatin and oxaliplatin both produce mainly 1,2-GG intrastrand cross-links as major adducts, but oxaliplatin is found to be more active particularly against cisplatin-resistant tumor cells. Mismatch repair and replicative bypass appear to be the processes most likely involved in differentiating the molecular responses to these two agents. This review describes the formation of Pt-DNA adducts, their interaction with cellular components, and biological effects of this interaction.
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Affiliation(s)
- Saeed Ahmad
- Department of Chemistry, University of Engineering and Technology, Lahore 54890, Pakistan.
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Cheng H, Sun N, Sun X, Chen B, Li F, Feng J, Cheng L, Cao Y. Polymorphisms in hMSH2 and hMLH1 and response to platinum-based chemotherapy in advanced non-small-cell lung cancer patients. Acta Biochim Biophys Sin (Shanghai) 2010; 42:311-7. [PMID: 20458443 DOI: 10.1093/abbs/gmq023] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Platinum-based chemotherapeutics are the most common regimens for advanced non-small-cell lung cancer (NSCLC) patients. However, it is difficult to identify platinum resistance in clinical treatment. Genetic factors are thought to represent important determinants of drug efficacy. In this study, we investigated whether singlenucleotide polymorphisms (SNPs) in human mutS homolog 2 (hMSH2) and the human mutL homolog 1 (hMLH1) were associated with the tumor response in advanced NSCLC patients received platinum-based chemotherapy in Chinese population. Totally, 96 patients with advanced NSCLC were routinely treated with cisplatin- or carboplatin-based chemotherapy. The three-dimensional (3D), polyacrylamide gel-based DNA microarray method was used to evaluate the genotypes of hMSH2 gIVS12-6T/ C and hMLH1-1151T/A with peripheral lymphocytes. We found that there was a significantly increased chance of treatment response to platinum-based chemotherapy with the hMSH2 gIVS12-6T/C polymorphism. The 3D polyacrylamide gel-based DNA microarray method is accurate, high-throughput, and inexpensive, especially suitable for a large scale of SNP genotyping in population.
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Affiliation(s)
- Hongyan Cheng
- Clinical Medicine College of Southeast University, Nanjing 210009, China
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Kamal NS, Soria JC, Mendiboure J, Planchard D, Olaussen KA, Rousseau V, Popper H, Pirker R, Bertrand P, Dunant A, Le Chevalier T, Filipits M, Fouret P. MutS Homologue 2 and the Long-term Benefit of Adjuvant Chemotherapy in Lung Cancer. Clin Cancer Res 2010; 16:1206-15. [DOI: 10.1158/1078-0432.ccr-09-2204] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Ramachandran S, Temple BR, Chaney SG, Dokholyan NV. Structural basis for the sequence-dependent effects of platinum-DNA adducts. Nucleic Acids Res 2009; 37:2434-48. [PMID: 19255091 PMCID: PMC2677858 DOI: 10.1093/nar/gkp029] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The differences in efficacy and molecular mechanisms of platinum based anti-cancer drugs cisplatin (CP) and oxaliplatin (OX) have been hypothesized to be in part due to the differential binding affinity of cellular and damage recognition proteins to CP and OX adducts formed on adjacent guanines in genomic DNA. HMGB1a in particular exhibits higher binding affinity to CP-GG adducts, and the extent of discrimination between CP- and OX-GG adducts is dependent on the bases flanking the adducts. However, the structural basis for this differential binding is not known. Here, we show that the conformational dynamics of CP- and OX-GG adducts are distinct and depend on the sequence context of the adduct. Molecular dynamics simulations of the Pt-GG adducts in the TGGA sequence context revealed that even though the major conformations of CP- and OX-GG adducts were similar, the minor conformations were distinct. Using the pattern of hydrogen bond formation between the Pt–ammines and the adjacent DNA bases, we identified the major and minor conformations sampled by Pt–DNA. We found that the minor conformations sampled exclusively by the CP-GG adduct exhibit structural properties that favor binding by HMGB1a, which may explain its higher binding affinity to CP-GG adducts, while these conformations are not sampled by OX-GG adducts because of the constraints imposed by its cyclohexane ring, which may explain the negligible binding affinity of HMGB1a for OX-GG adducts in the TGGA sequence context. Based on these results, we postulate that the constraints imposed by the cyclohexane ring of OX affect the DNA conformations explored by OX-GG adduct compared to those of CP-GG adduct, which may influence the binding affinities of HMG-domain proteins for Pt-GG adducts, and that these conformations are further influenced by the DNA sequence context of the Pt-GG adduct.
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Affiliation(s)
- Srinivas Ramachandran
- Department of Biochemistry and Biophysics, University of North Carolina-Chapel Hill, Chapel Hill, NC 27599-7260, USA
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Kim GP. Predictive Markers in Colorectal Cancer. SEMINARS IN COLON AND RECTAL SURGERY 2008. [DOI: 10.1053/j.scrs.2008.09.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Wilson C, Purcell C, Seaton A, Oladipo O, Maxwell PJ, O'Sullivan JM, Wilson RH, Johnston PG, Waugh DJJ. Chemotherapy-induced CXC-chemokine/CXC-chemokine receptor signaling in metastatic prostate cancer cells confers resistance to oxaliplatin through potentiation of nuclear factor-kappaB transcription and evasion of apoptosis. J Pharmacol Exp Ther 2008; 327:746-59. [PMID: 18780829 DOI: 10.1124/jpet.108.143826] [Citation(s) in RCA: 86] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Constitutive activation of nuclear factor (NF)-kappaB is linked with the intrinsic resistance of androgen-independent prostate cancer (AIPC) to cytotoxic chemotherapy. Interleukin-8 (CXCL8) is a transcriptional target of NF-kappaB whose expression is elevated in AIPC. This study sought to determine the significance of CXCL8 signaling in regulating the response of AIPC cells to oxaliplatin, a drug whose activity is reportedly sensitive to NF-kappaB activity. Administration of oxaliplatin to PC3 and DU145 cells increased NF-kappaB activity, promoting antiapoptotic gene transcription. In addition, oxaliplatin increased the transcription and secretion of CXCL8 and the related CXC-chemokine CXCL1 and increased the transcription and expression of CXC-chemokine receptors, especially CXC-chemokine receptor (CXCR) 2, which transduces the biological effects of CXCL8 and CXCL1. Stimulation of AIPC cells with CXCL8 potentiated NF-kappaB activation in AIPC cells, increasing the transcription and expression of NF-kappaB-regulated antiapoptotic genes of the Bcl-2 and IAP families. Coadministration of a CXCR2-selective antagonist, AZ10397767 (Bioorg Med Chem Lett 18:798-803, 2008), attenuated oxaliplatin-induced NF-kappaB activation, increased oxaliplatin cytotoxicity, and potentiated oxaliplatin-induced apoptosis in AIPC cells. Pharmacological inhibition of NF-kappaBorRNA interference-mediated suppression of Bcl-2 and survivin was also shown to sensitize AIPC cells to oxaliplatin. Our results further support NF-kappaB activity as an important determinant of cancer cell sensitivity to oxaliplatin and identify the induction of autocrine CXCR2 signaling as a novel mode of resistance to this drug.
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Affiliation(s)
- Catherine Wilson
- Centre for Cancer Research and Cell Biology, Queens University Belfast, 97 Lisburn Road, Belfast BT9 7BL, UK.
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Noordhuis P, Laan AC, van de Born K, Losekoot N, Kathmann I, Peters GJ. Oxaliplatin activity in selected and unselected human ovarian and colorectal cancer cell lines. Biochem Pharmacol 2008; 76:53-61. [PMID: 18508032 DOI: 10.1016/j.bcp.2008.04.007] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2008] [Revised: 04/10/2008] [Accepted: 04/11/2008] [Indexed: 12/15/2022]
Abstract
Oxaliplatin is used for treatment of colon cancer in combination with 5-fluorouracil or irinotecan. Oxaliplatin has similar, but also different resistant mechanisms as cisplatin. We studied the activity of oxaliplatin in ovarian and colon cancer cells with different resistance patterns to cisplatin. The 40-fold cisplatin-resistant cell line ADDP was only 7.5-fold resistant to oxaliplatin. The gemcitabine-resistant AG6000 cell line, 9-fold resistant to cisplatin, was not cross-resistant. LoVo-175X2, with mutant p53 showed no resistance compared to the empty vector control. However, LoVo-Li, with inactive p53, was 3.6-fold resistant corresponding to decreased accumulation and Pt adducts. Accumulation and DNA adducts formation showed no significant correlation with oxaliplatin sensitivity. Cell cycle distribution after exposure to oxaliplatin showed arrest in G2/M (A2780) or in S-phase (LoVo-92) for wt-p53 cells. ADDP and LoVo-Li showed G1 arrest followed by S-phase arrest and no changes in distribution, respectively. The cell cycle related proteins Cyclins A and B1 and (p)CDC25C were marginally affected by oxaliplatin. Expression of hCTR1 was decreased in ADDP, LoVo-Li and AG6000, OCT1 decreased in ADDP and AG6000 and OCT3 in LoVo-175X2, compared to the parental cell lines. In ADDP and LoVo-175X2 ATP7A and B were decreased but were increased in AG6000. From this study it can be concluded that changes in cell cycle distribution were cell line dependent and not related to changes in expression of Cyclin A or B1. Oxaliplatin accumulation was related to hCTR1 and, at low concentration, ATP7A to DNA adducts formation while the retention was related to hCTR1, OCT2 and ATP7B.
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Affiliation(s)
- Paul Noordhuis
- Department of Medical Oncology, VU University Medical Center, De Boelelaan 1117, 1081 HV Amsterdam, The Netherlands
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Wang X, Guo Z. Towards the rational design of platinum(ii) and gold(iii) complexes as antitumour agents. Dalton Trans 2008:1521-32. [DOI: 10.1039/b715903j] [Citation(s) in RCA: 140] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Kim GP, Colangelo LH, Paik S, O'Connell MJ, Kirsch IR, Allegra C, Wolmark N. Predictive value of microsatellite instability-high remains controversial. J Clin Oncol 2007; 25:4857; author reply 4857-8. [PMID: 17947740 DOI: 10.1200/jco.2007.13.2019] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
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Cerqueira GC, Bartholomeu DC, DaRocha WD, Hou L, Freitas-Silva DM, Machado CR, El-Sayed NM, Teixeira SMR. Sequence diversity and evolution of multigene families in Trypanosoma cruzi. Mol Biochem Parasitol 2007; 157:65-72. [PMID: 18023889 DOI: 10.1016/j.molbiopara.2007.10.002] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2007] [Revised: 10/02/2007] [Accepted: 10/03/2007] [Indexed: 10/22/2022]
Abstract
Several copies of genes belonging to three multigene families present in the genome of Trypanosoma cruzi were sequenced and comparatively analyzed across six different strains of the parasite belonging to the T. cruzi I lineage (Colombiana, Silvio X10 and Dm28c), the T. cruzi II lineage (Esmeraldo and JG) and a hybrid strain (CL Brener). For all three gene families analyzed, our results support the division in T. cruzi I and II lineages. Furthermore, in agreement with its hybrid nature, sequences derived from the CL Brener clone clustered together with T. cruzi II sequences as well as with a third group of sequences. Paralogous sequences encoding Amastin, an amastigote surface glycoprotein and TcAG48, an antigenic RNA binding protein, which are clustered in the parasite genome, present higher intragenomic variability in T. cruzi II and CL Brener strains, when compared to T. cruzi I strains. Paralogous sequences derived from the TcADC gene family, which encode various isoforms of adenylyl cyclases and are dispersed throughout the T. cruzi genome, exhibit similar degree of variability in all strains, except in the CL Brener strain, in which the sequences were more divergent. Several factors including mutation rates and gene conversion mechanisms, acting differently within the T. cruzi population, may contribute to create such distinct levels of sequence diversity in multigene families that are clustered in the T. cruzi genome.
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Affiliation(s)
- Gustavo C Cerqueira
- Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
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