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Espitia-Pérez L, Brango H, Peñata-Taborda A, Galeano-Páez C, Jaramillo-García M, Espitia-Pérez P, Pastor-Sierra K, Bru-Cordero O, Hoyos-Giraldo LS, Reyes-Carvajal I, Saavedra-Trujillo D, Ricardo-Caldera D, Coneo-Pretelt A. Influence of genetic polymorphisms of Hg metabolism and DNA repair on the frequencies of micronuclei, nucleoplasmic bridges, and nuclear buds in communities living in gold mining areas. MUTATION RESEARCH. GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2024; 897:503790. [PMID: 39054006 DOI: 10.1016/j.mrgentox.2024.503790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/29/2024] [Revised: 06/07/2024] [Accepted: 06/12/2024] [Indexed: 07/27/2024]
Abstract
Fishing communities living near gold mining areas are at increased risk of mercury (Hg) exposure via bioaccumulation of methylmercury (MeHg) in fish. This exposure has been linked to health effects that may be triggered by genotoxic events. Genetic polymorphisms play a role in the risk associated with Hg exposure. This study evaluated the effect of single nucleotide polymorphisms (SNPs) in metabolic and DNA repair genes on genetic instability and total hair Hg (T-Hg) levels in 78 individuals from "La Mojana" in northern Colombia and 34 individuals from a reference area. Genetic instability was assessed by the frequency of micronuclei (MNBN), nuclear buds (NBUDS), and nucleoplasmic bridges (NPB). We used a Poisson regression to assess the influence of SNPs on T-Hg levels and genetic instability, and a Bayesian regression to examine the interaction between Hg detoxification and DNA repair. Among exposed individuals, carriers of XRCC1Arg399Gln had a significantly higher frequency of MNBN. Conversely, the XRCC1Arg194Trp and OGG1Ser326Cys polymorphisms were associated with lower frequencies of MNBN. XRCC1Arg399Gln, XRCC1Arg280His, and GSTM1Null carriers showed lower NPB frequencies. Our results also indicated that individuals with the GSTM1Nulland GSTT1null polymorphisms had a 1.6-fold risk for higher T-Hg levels. The Bayesian model showed increased MNBN frequencies in carriers of the GSTM1Null polymorphism in combination with XRCC1Arg399Gln and increased NBUDS frequencies in the GSTM1Null carriers with the XRCC3Thr241Met and OGG1Ser326Cys alleles. The GSTM1+ variant was found to be a protective factor in individuals carrying OGG1Ser326Cys (MNBN) and XRCC1Arg280His (NPB); the GSTT1+ polymorphism combined with XRCCArg194Trp also modulated lower MNBN frequencies, while GSTT1+ carriers with the XRCC1Arg399Gln allele showed lower NPB frequencies. Consistent with GSTM1, GSTT1Null carriers with XRCC3Thr241Met showed increased NBUDS frequency. With the rise of gold mining activities, these approaches are vital to identify and safeguard populations vulnerable to Hg's toxic effects.
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Affiliation(s)
- Lyda Espitia-Pérez
- Facultad de Ciencias de la Salud, Laboratorio de Investigación Biomédica y Biología Molecular, Universidad del Sinú, Montería, Córdoba, Colombia.
| | - Hugo Brango
- Departamento de Matemáticas y Estadística, Universidad del Norte, Barranquilla, Colombia
| | - Ana Peñata-Taborda
- Facultad de Ciencias de la Salud, Laboratorio de Investigación Biomédica y Biología Molecular, Universidad del Sinú, Montería, Córdoba, Colombia
| | - Claudia Galeano-Páez
- Facultad de Ciencias de la Salud, Laboratorio de Investigación Biomédica y Biología Molecular, Universidad del Sinú, Montería, Córdoba, Colombia
| | - Manolo Jaramillo-García
- Facultad de Ciencias de la Salud, Laboratorio de Investigación Biomédica y Biología Molecular, Universidad del Sinú, Montería, Córdoba, Colombia (Postmorten)
| | - Pedro Espitia-Pérez
- Facultad de Ciencias de la Salud, Laboratorio de Investigación Biomédica y Biología Molecular, Universidad del Sinú, Montería, Córdoba, Colombia
| | - Karina Pastor-Sierra
- Facultad de Ciencias de la Salud, Laboratorio de Investigación Biomédica y Biología Molecular, Universidad del Sinú, Montería, Córdoba, Colombia
| | - Osnamir Bru-Cordero
- Universidad Nacional de Colombia, Dirección académica, kilómetro 9, vía Valledupar-La Paz, La Paz, Cesar, Colombia
| | - Luz Stella Hoyos-Giraldo
- Department of Biology, Research Group Genetic Toxicology and Cytogenetics, Faculty of Natural Sciences and Education, Universidad del Cauca, Popayán, Cauca, Colombia
| | - Ingrid Reyes-Carvajal
- Department of Biology, Research Group Genetic Toxicology and Cytogenetics, Faculty of Natural Sciences and Education, Universidad del Cauca, Popayán, Cauca, Colombia
| | - Diana Saavedra-Trujillo
- Department of Biology, Research Group Genetic Toxicology and Cytogenetics, Faculty of Natural Sciences and Education, Universidad del Cauca, Popayán, Cauca, Colombia
| | - Dina Ricardo-Caldera
- Grupo de Investigación Enfermedades Tropicales y Resistencia Bacteriana, Universidad del Sinú, Montería, Córdoba, Colombia
| | - Andrés Coneo-Pretelt
- Facultad de Ciencias de la Salud, Laboratorio de Investigación Biomédica y Biología Molecular, Universidad del Sinú, Montería, Córdoba, Colombia
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Nigam K, Verma Y, Dwivedi M, Sanyal S. BER genes expression in oral and pre-oral cancer: Combinatorial approach to propose potential biomarker. Curr Probl Cancer 2024; 50:101104. [PMID: 38718710 DOI: 10.1016/j.currproblcancer.2024.101104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2024] [Revised: 04/03/2024] [Accepted: 04/30/2024] [Indexed: 06/16/2024]
Abstract
OBJECTIVE DNA repair genes and their variants have been found to alter the risk of oral cancer. METHOD The level of expression of XRCC3, NBS1, and OGG1 genes among 20 cases of oral cancer, 6 pre-oral cancer, and 50 healthy control subjects was measured with RT-PCR. All the subjects were also genotyped for XRCC3 rs861539 C>T, NBS1 rs1805794 C>G, and OGG1 rs1052133 C>G polymorphisms by the PCR-RFLP method; their genotypes were correlated with their level of expression. Further, a localized fold structure analysis of the mRNA sequence surrounding the studied SNPs was performed with RNAfold. RESULTS Results showed increased expression of XRCC3, NBS1, and OGG1 transcripts among oral cancer (4.49 fold, 3.45 fold, and 3.27 fold) as well as pre-oral cancer (3.04 fold, 5.32 fold, and 1.74 fold) as compared to control subjects. The transcript level of OGG1 was found to be significantly increased (6.68 fold, p-value 0.009) with the GG genotype compared to the CC genotype. The C>T polymorphism of XRCC3 and the C>G polymorphism of OGG1 result in an apparent change in its mRNA secondary structure. Folding energy with the C allele for XRCC3 C>T polymorphism was lower than that of the T allele (MFE C vs T: -50.20 kcal/mol vs -48.70 kcal/mol). In the case of OGG1 C>G polymorphism MFE for the C allele was higher (-23.30 kcal/mole) than with the G allele (-24.80 kcal/mol). CONCLUSION Our results showed elevated levels of XRCC3, NBS1, and OGG1 both in oral cancer and pre-oral cancer conditions, which indicates their role as prospective biomarkers of oral cancer and pre-cancerous lesions. SNPs in these genes alter their level of expression, possibly by altering the secondary structure of their transcript. However, due to the small sample size our study can only provide a suggestive conclusion and warned future study with large sample size to verify our findings.
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Affiliation(s)
- Kumud Nigam
- Amity Institute of Biotechnology, Amity University Uttar Pradesh, Lucknow, Gomti Nagar Ext. Lucknow-226028, India
| | - Yogendra Verma
- Department of Oral Pathology, King George's Medical University, Lucknow, India
| | - Manish Dwivedi
- Amity Institute of Biotechnology, Amity University Uttar Pradesh, Lucknow, Gomti Nagar Ext. Lucknow-226028, India
| | - Somali Sanyal
- Amity Institute of Biotechnology, Amity University Uttar Pradesh, Lucknow, Gomti Nagar Ext. Lucknow-226028, India.
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Wang YY, Cheng KH, Hung AC, Lo S, Chen PY, Wu YC, Hou MF, Yuan SSF. Differential impact of cytoplasmic vs. nuclear RAD51 expression on breast cancer progression and patient prognosis. Int J Oncol 2024; 64:12. [PMID: 38063232 PMCID: PMC10734667 DOI: 10.3892/ijo.2023.5600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Accepted: 11/14/2023] [Indexed: 12/18/2023] Open
Abstract
RAD51 recombinase is one of the DNA damage repair proteins associated with breast cancer risk. Apart from its function to maintain genomic integrity within the cell nucleus, RAD51 localized to the cytoplasm has also been implicated in breast malignancy. However, limited information exists on the roles of cytoplasmic vs. nuclear RAD51 in breast cancer progression and patient prognosis. In the present study, the association of cytoplasmic and nuclear RAD51 with clinical outcomes of patients with breast cancer was analyzed, revealing that elevated cytoplasmic RAD51 expression was associated with breast cancer progression, including increased cancer stage, grade, tumor size, lymph node metastasis and chemoresistance, along with reduced patient survival. By contrast, elevated nuclear RAD51 expression largely had the inverse effect. Results from in vitro investigations supported the cancer‑promoting effect of RAD51, showing that overexpression of RAD51 promoted breast cancer cell growth, chemoresistance and metastatic ability, while knockdown of RAD51 repressed these malignant behaviors. The current data suggest that differential expression of subcellular RAD51 had a distinct impact on breast cancer progression and patient survival. Specifically, cytoplasmic RAD51 in contrast to nuclear RAD51 was potentially an adverse marker in breast cancer.
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Affiliation(s)
- Yen-Yun Wang
- School of Dentistry, College of Dental Medicine, Kaohsiung Medical University Hospital, Kaohsiung 807
- Drug Development and Value Creation Research Center, Kaohsiung Medical University Hospital, Kaohsiung 807, Taiwan, R.O.C
- Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung 807, Taiwan, R.O.C
| | - Kuang-Hung Cheng
- Institute of Biomedical Sciences, National Sun Yat-Sen University, Kaohsiung 804, Taiwan, R.O.C
- Department of Medical Laboratory Science and Biotechnology, College of Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan, R.O.C
| | - Amos C. Hung
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan, R.O.C
| | - Steven Lo
- College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow G12 8QQ, UK
| | - Pang-Yu Chen
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan, R.O.C
| | - Yi-Chia Wu
- Division of Plastic Surgery, Department of Surgery, Kaohsiung Medical University, Kaohsiung 807, Taiwan, R.O.C
- School of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan, R.O.C
- Division of Breast Oncology and Surgery, Department of Surgery, Kaohsiung Medical University, Kaohsiung 807, Taiwan, R.O.C
| | - Ming-Feng Hou
- Division of Breast Oncology and Surgery, Department of Surgery, Kaohsiung Medical University, Kaohsiung 807, Taiwan, R.O.C
- Department of Biomedical Science and Environmental Biology, College of Life Science, Kaohsiung Medical University, Kaohsiung 807, Taiwan, R.O.C
| | - Shyng-Shiou F. Yuan
- Drug Development and Value Creation Research Center, Kaohsiung Medical University Hospital, Kaohsiung 807, Taiwan, R.O.C
- Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung 807, Taiwan, R.O.C
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan, R.O.C
- Department of Biological Science and Technology, Institute of Molecular Medicine and Bioengineering, Center for Intelligent Drug Systems and Smart Bio-devices (IDSB), National Yang Ming Chiao Tung University, Hsinchu 300, Taiwan, R.O.C
- Translational Research Center, Kaohsiung Medical University Hospital, Kaohsiung 807, Taiwan, R.O.C
- Department of Obstetrics and Gynecology, Kaohsiung Medical University Hospital, Kaohsiung 807, Taiwan, R.O.C
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Abbasi SF, Mahjabeen I, Parveen N, Qamar I, Haq MFU, Shafique R, Saeed N, Ashraf NS, Kayani MA. Exploring homologous recombination repair and base excision repair pathway genes for possible diagnostic markers in hematologic malignancies. Mol Genet Genomics 2023; 298:1527-1543. [PMID: 37861816 DOI: 10.1007/s00438-023-02078-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Accepted: 10/04/2023] [Indexed: 10/21/2023]
Abstract
Hematologic malignancies (HMs) are a collection of malignant transformations, originating from the cells in the bone marrow and lymphoid organs. HMs comprise three main types; leukemia, lymphoma, and multiple myeloma. Globally, HMS accounts for approximately 10% of newly diagnosed cancer. DNA repair pathways defend the cells from recurrent DNA damage. Defective DNA repair mechanisms such as homologous recombination repair (HRR), nucleotide excision repair (NER), and base excision repair (BER) pathways may lead to genomic instability, which initiates HM progression and carcinogenesis. Expression deregulation of HRR, NER, and BER has been investigated in various malignancies. However, no studies have been reported to assess the differential expression of selected DNA repair genes combinedly in HMs. The present study was designed to assess the differential expression of HRR and BER pathway genes including RAD51, XRCC2, XRCC3, APEX1, FEN1, PARP1, and XRCC1 in blood cancer patients to highlight their significance as diagnostic/ prognostic marker in hematological malignancies. The study cohort comprised of 210 blood cancer patients along with an equal number of controls. For expression analysis, q-RT PCR was performed. DNA damage was measured in blood cancer patients and controls using the comet assay and LORD Q-assay. Data analysis showed significant downregulation of selected genes in blood cancer patients compared to healthy controls. To check the diagnostic value of selected genes, the Area under curve (AUC) was calculated and 0.879 AUC was observed for RAD51 (p < 0.0001) and 0.830 (p < 0.0001) for APEX1. Kaplan-Meier analysis showed that downregulation of RAD51 (p < 0.0001), XRCC3 (p < 0.02), and APEX1 (p < 0.0001) was found to be associated with a significant decrease in survival of blood cancer patients. Cox regression analysis showed that deregulation of RAD51 (p < 0.0001), XRCC2 (p < 0.02), XRCC3 (p < 0.003), and APEX1 (p < 0.00001) was found to be associated with the poor prognosis of blood cancer patients. Comet assay showed an increased number of comets in blood cancer patients compared to controls. These results are confirmed by performing the LORD q-assay and an increased frequency of lesions/Kb was observed in selected genes in cancer patients compared to controls. Our results showed significant downregulation of RAD51, XRCC2, XRCC3, APEX1, FEN1, PARP1, and XRCC1 genes with increased DNA damage in blood cancer patients. The findings of the current research suggested that deregulated expression of HRR and BER pathway genes can act as a diagnostic/prognostic marker in hematologic malignancies.
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Affiliation(s)
- Sumaira Fida Abbasi
- Cancer Genetics and Epigenetics Research Group, Department of Biosciences, COMSATS University, Park Road, Islamabad, Pakistan
| | - Ishrat Mahjabeen
- Cancer Genetics and Epigenetics Research Group, Department of Biosciences, COMSATS University, Park Road, Islamabad, Pakistan.
| | - Neelam Parveen
- Cancer Genetics and Epigenetics Research Group, Department of Biosciences, COMSATS University, Park Road, Islamabad, Pakistan
| | - Imama Qamar
- Cancer Genetics and Epigenetics Research Group, Department of Biosciences, COMSATS University, Park Road, Islamabad, Pakistan
| | - Maria Fazal Ul Haq
- Cancer Genetics and Epigenetics Research Group, Department of Biosciences, COMSATS University, Park Road, Islamabad, Pakistan
| | - Rabia Shafique
- Cancer Genetics and Epigenetics Research Group, Department of Biosciences, COMSATS University, Park Road, Islamabad, Pakistan
| | - Nadia Saeed
- Cancer Genetics and Epigenetics Research Group, Department of Biosciences, COMSATS University, Park Road, Islamabad, Pakistan
| | - Nida Sarosh Ashraf
- Cancer Genetics and Epigenetics Research Group, Department of Biosciences, COMSATS University, Park Road, Islamabad, Pakistan
| | - Mahmood Akhtar Kayani
- Cancer Genetics and Epigenetics Research Group, Department of Biosciences, COMSATS University, Park Road, Islamabad, Pakistan
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Yu X, Wang Q, He G, Yu H. Association between XRCC3 Thr241Met polymorphism and risk of gynecological malignancies: A meta-analysis. Cancer Genet 2021; 254-255:11-17. [PMID: 33515810 DOI: 10.1016/j.cancergen.2021.01.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Revised: 10/19/2020] [Accepted: 01/09/2021] [Indexed: 11/27/2022]
Abstract
Studies have investigated the relationship between the X-ray cross- complementing group 3 (XRCC3) Thr241Met polymorphism and the risk of gynecological malignancies (GM) with the contradictory conclusions. Here, a meta-analysis was performed to provide clear picture of the association between Thr241Met and GM risk. The Pubmed and Chinese National Knowledge Infrastructure (CNKI) databases were searched for published eligible studies. The pooled odds ratios (OR) with their corresponding 95% confidence interval (CI) was used to assessed the strength of association. Totally, 15 publications with 5,740 cases and 9,931 controls were included. In the overall analysis, the results of meta-analysis showed no significant association between the Thr241Met and the risk of GM. However, in the Asians subgroup, significant increased risks were found in the comparisons of TT/CT+TT vs. CC(TT vs. CC: OR=3.25, 95% CI=1.47-7.18; CT+TT vs. CC: OR=1.51, 95%CI=1.10-2.09) in Asians; additionally, stratified analysis by cancer type in Asians, significantly increased risks was found in cervical carcinoma (CT vs. CC: OR=1.50, 95%CI=1.04-2.14; TT vs. CC: OR=3.14, 95%CI=1.38-7.14; CT+TT vs. CC: OR=1.64, 95% CI=1.17-2.31). It suggests that the risk of GM might be significantly increased by the XRCC3 Thr241Met polymorphism according to ethnicity and cancer types. Further studies with larger sample size in different ethnic populations and different sites of GM are needed to verify the findings.
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Affiliation(s)
- Xiangyuan Yu
- Department of Epidemiology, School of Public Health, Guilin Medical University, Guilin 541004, China
| | - Qianqian Wang
- Department of Oncology, Ezhou Central Hospital, Ezhou 436000, China
| | - Gaofeng He
- Department of Oncology, Ezhou Central Hospital, Ezhou 436000, China
| | - Hongping Yu
- Affiliated Tumor Hospital of Guangxi Medical University, Nanning 530021, China.
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Guo T, Jiang ZB, Tong ZY, Zhou Y, Chai XP, Xiao XZ. Shikonin Ameliorates LPS-Induced Cardiac Dysfunction by SIRT1-Dependent Inhibition of NLRP3 Inflammasome. Front Physiol 2020; 11:570441. [PMID: 33178042 PMCID: PMC7596688 DOI: 10.3389/fphys.2020.570441] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Accepted: 09/16/2020] [Indexed: 12/21/2022] Open
Abstract
Shikonin (SHI) is an anti-inflammatory agent extracted from natural herbs. It is still unknown whether SHI ameliorates lipopolysaccharide (LPS)-induced cardiac dysfunction. This study aims to explore the protective effects of SHI on LPS-induced myocardial injury and its mechanism. The LPS-induced cardiac dysfunction mouse model was employed to investigate the protective effects of SHI. In the present study, we found that SHI treatment improved the survival rate and cardiac function and remarkably ameliorated the release of inflammatory cytokines and macrophage infiltration in heart tissue of LPS-treated mice. SHI also reduced lactate dehydrogenase (LDH) and cardiac troponin (cTn) release, cell inflammation, and apoptosis in LPS plus adenosine triphosphate (ATP)-treated H9c2 cells. In addition, SHI significantly upregulated silent information regulator 1 (SIRT1) expression and suppressed the upregulation of NOD-like receptor protein 3 (NLRP3), cleaved caspase-1, and caspase-1 activity in heart tissues induced by LPS. Meanwhile, we got the same results in LPS plus ATP-treated H9c2 cells in vitro. Further, SIRT1 inhibitor or siRNA partially blocked SHI-mediated upregulation of SIRT1 expression and downregulation of NLRP3, cleaved caspase-1, and caspase-1 activity in heart tissues induced by LPS. Therefore, we conclude that SHI ameliorates LPS-induced cardiac dysfunction by inhibiting SIRT1-dependent activation of NLRP3 inflammasomes and might be a promising therapeutic strategy for the treatment of LPS-induced cardiac dysfunction.
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Affiliation(s)
- Tao Guo
- Department of Emergency Medicine, Second Xiangya Hospital, Emergency Medicine and Difficult Diseases Institute, Central South University, Changsha, China.,Department of Pathophysiology, Sepsis Translational Medicine Key Laboratory of Hunan Province, Xiangya School of Medicine, Central South University, Changsha, China
| | - Zhong-Biao Jiang
- Department of Radiology, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Zhong-Yi Tong
- Department of Pathology, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Yang Zhou
- Department of Emergency Medicine, Second Xiangya Hospital, Emergency Medicine and Difficult Diseases Institute, Central South University, Changsha, China
| | - Xiang-Ping Chai
- Department of Emergency Medicine, Second Xiangya Hospital, Emergency Medicine and Difficult Diseases Institute, Central South University, Changsha, China
| | - Xian-Zhong Xiao
- Department of Pathophysiology, Sepsis Translational Medicine Key Laboratory of Hunan Province, Xiangya School of Medicine, Central South University, Changsha, China
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Alkasaby MK, Abd El-Fattah AI, Ibrahim IH, Abd El-Samie HS. Polymorphism of XRCC3 in Egyptian Breast Cancer Patients. PHARMACOGENOMICS & PERSONALIZED MEDICINE 2020; 13:273-282. [PMID: 32821150 PMCID: PMC7418173 DOI: 10.2147/pgpm.s260682] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Accepted: 07/20/2020] [Indexed: 12/20/2022]
Abstract
Purpose Polymorphisms of DNA repair genes may contribute to variations in DNA repair capacity and subsequent genetic susceptibility to different cancers. In Egypt, breast cancer is the most common cancer among women, representing 18.9% of the total cancer cases. The present study assesses the correlation between X-ray repair cross-complementing group 3 (XRCC3) polymorphism with breast cancer and treatment response in Egyptian female breast cancer patients. Patients and Methods This pilot case–control study was conducted on 66 female breast cancer patients and 20 apparently healthy females as a control group. Tumor grading, immunohistostaining of hormone (progesterone and estrogen) receptors and human epidermal growth factor receptor 2 (HER2), and RFLP-PCR for XRCC3 (rs861539) polymorphism were performed. All breast cancer patients received a treatment protocol (after surgery) which was either chemotherapy (anthracyclines followed by paclitaxel or anthracyclines + fluorouracil) or radiotherapy, or both. Disease-free survival (DFS) and overall survival (OS) were recorded. Results The number of patients with a heterozygous allele (GA) was significantly higher in cases of tumor size >20 mm. The A allele was correlated with younger age at diagnosis in both chemotherapy and radiotherapy groups. Poor treatment response and higher mortality rates were significantly associated with AA and GA compared with GG alleles (normal allele). In the chemotherapy group, out of eight patients with the A allele, six showed a poor response to treatment containing fluorouracil. Conclusion XRCC3 rs861539 polymorphism could be associated with lower DFS and OS and poor treatment response. So, we recommend carrying out XRCC3 genotyping before starting treatment to choose the most effective treatment strategy according to XRCC3 polymorphism. ![]()
Point your SmartPhone at the code above. If you have a QR code reader the video abstract will appear. Or use: https://youtu.be/_MRawBP1Tmg
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Affiliation(s)
- Mona Khyri Alkasaby
- Department of Biochemistry and Molecular Biology, Faculty of Pharmacy (Girls), Al-Azhar University, Nasr City, Cairo, Egypt
| | - Abeer Ibrahim Abd El-Fattah
- Department of Biochemistry and Molecular Biology, Faculty of Pharmacy (Girls), Al-Azhar University, Nasr City, Cairo, Egypt
| | - Iman Hassan Ibrahim
- Department of Biochemistry and Molecular Biology, Faculty of Pharmacy (Girls), Al-Azhar University, Nasr City, Cairo, Egypt
| | - Hesham Samir Abd El-Samie
- Department of Clinical Pathology, Faculty of Medicine (New Damietta), Al-Azhar University, New Damietta, Damietta, Egypt
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Evaluation of X-Ray Repair Cross-Complementing Family Members as Potential Biomarkers for Predicting Progression and Prognosis in Hepatocellular Carcinoma. BIOMED RESEARCH INTERNATIONAL 2020; 2020:5751939. [PMID: 32258128 PMCID: PMC7103035 DOI: 10.1155/2020/5751939] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Accepted: 01/24/2020] [Indexed: 12/28/2022]
Abstract
The X-ray repair cross-complementing (XRCC) gene family has been revealed to participate in the carcinogenesis and development of numerous cancers. However, the expression profiles and prognostic values of XRCCs (XRCC1-6) in hepatocellular carcinoma (HCC) have not been explored up to now. The transcriptional levels of XRCCs in primary HCC tissues were analyzed by UALCAN and GEPIA. The relationship between XRCCs expression and HCC clinical characteristics was evaluated using UALCAN. Moreover, the prognostic values of XRCCs expression and mutations in HCC patients were investigated via the GEPIA and cBioPortal, respectively. Last but not least, the functions and pathways of XRCCs in HCC were also predicted by cBioPortal and DVAID. The transcriptional levels of all XRCCs in HCC tissues were notably elevated compared with normal liver tissues. Meanwhile, upregulated XRCCs expression was positively associated with clinical stages and tumor grades of HCC patients. Survival analysis using the GEPIA database revealed that high transcription levels of XRCC2/3/4/5/6 were associated with lower overall survival (OS) and high transcription levels of XRCC1/2/3/6 were correlated with poor disease-free survival (DFS) in HCC patients. Furthermore, Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) demonstrated the possible mechanisms of XRCCs and their associated genes participating in the oncogenesis of HCC. Our findings systematically elucidate the expression profiles and distinct prognostic values of XRCCs in HCC, which might provide promising therapeutic targets and novel prognostic biomarkers for HCC patients.
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Luo L, Gao W, Wang J, Wang D, Peng X, Jia Z, Jiang Y, Li G, Tang D, Wang Y. Study on the Mechanism of Cell Cycle Checkpoint Kinase 2 (CHEK2) Gene Dysfunction in Chemotherapeutic Drug Resistance of Triple Negative Breast Cancer Cells. Med Sci Monit 2018; 24:3176-3183. [PMID: 29761796 PMCID: PMC5978023 DOI: 10.12659/msm.907256] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Background This study aimed to investigate the mechanism of CHEK2 gene dysfunction in drug resistance of triple negative breast cancer (TNBC) cells. Material/Methods To perform our study, a stable CHEK2 wild type (CHEK2 WT) or CHEK2 Y390C mutation (CHEK2 Y390C) expressed MDA-MB-231 cell line was established. MTT assay, cell apoptosis assay and cell cycle assay were carried out to analyze the cell viability, apoptosis, and cell cycle respectively. Western blotting and qRT-PCR were applied for related protein and gene expression detection. Results We found that the IC50 value of DDP (Cisplatin) to CHEK2 Y390C expressed MDA-MB-231 cells was significantly higher than that of the CHEK2 WT expressed cells and the control cells. After treatment with DDP for 48 h, cells expressing CHEK2 WT showed lower cell viability than that of the CHEK2 Y390C expressed cells and the control cells; compared with the CHEK2 Y390C expressed cells and the control cells, cells expressing CHEK2 WT showed significant G1/S arrest. Meanwhile, we found that compared with the CHEK2 Y390C expressed cells and the control cells, cell apoptosis was significantly increased in CHEK2 WT expressed cells. Moreover, our results suggested that cells expressing CHEK2 WT showed higher level of p-CDC25A, p-p53, p21, Bax, PUMA, and Noxa than that of the CHEK2 Y390C expressed cells and the control cells. Conclusions Our findings indicated that CHEK2 Y390C mutation induced the drug resistance of TNBC cells to chemotherapeutic drugs through administrating cell apoptosis and cell cycle arrest via regulating p53 activation and CHEK2-p53 apoptosis pathway.
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Affiliation(s)
- Li Luo
- Department of Oncological Hematology, First Affiliated Hospital of Guiyang College of Traditional Chinese Medicine (TCM), Guiyang, Guizhou, China (mainland).,Department of Oncology, Guihang Guiyang Hospital, Guiyang, Guizhou, China (mainland)
| | - Wei Gao
- Department of Radiation Oncology, Shanghai Ninth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China (mainland)
| | - Jinghui Wang
- Department of Oncological Hematology, First Affiliated Hospital of Guiyang College of Traditional Chinese Medicine (TCM), Guiyang, Guizhou, China (mainland)
| | - Dingxue Wang
- Department of Oncological Hematology, First Affiliated Hospital of Guiyang College of Traditional Chinese Medicine (TCM), Guiyang, Guizhou, China (mainland)
| | - Xiaobo Peng
- Department of Oncology, Changhai Hospital, Second Military Medical University, Shanghai, China (mainland)
| | - Zhaoyang Jia
- Department of Radiotherapy, Shanghai Tenth People's Hospital of Tongji University, Shanghai, China (mainland)
| | - Ye Jiang
- Department of Oncology, GuiHang Guiyang Hospital, Guiyang, Guizhou, China (mainland)
| | - Gongzhuo Li
- Department of Oncology, GuiHang Guiyang Hospital, Guiyang, Guizhou, China (mainland)
| | - Dongxin Tang
- Department of Science and Education, First Affiliated Hospital of Guiyang College of Traditional Chinese Medicine (TCM), Guiyang, Guizhou, China (mainland)
| | - Yajie Wang
- Department of Oncology, Changhai Hospital, Second Military Medical University, Shanghai, China (mainland)
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10
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Gao W, Wu M, Wang N, Zhang Y, Hua J, Tang G, Wang Y. Increased expression of mitochondrial transcription factor A and nuclear respiratory factor-1 predicts a poor clinical outcome of breast cancer. Oncol Lett 2017; 15:1449-1458. [PMID: 29434836 PMCID: PMC5774493 DOI: 10.3892/ol.2017.7487] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Accepted: 08/11/2017] [Indexed: 01/19/2023] Open
Abstract
Nuclear respiratory factor-1 (Nrf1) and mitochondrial transcription factor A (TFAM) are involved in the regulation of a variety of mitochondrial functional genes, which are associated with decreased sensitivity of tumor cells to chemotherapy. However, the expression status of Nrf1 and TFAM, as well as their clinical significance in breast cancer, is unknown. In the present study, tumor tissues and corresponding adjacent normal tissues were collected from 336 patients with breast cancer, and Nrf1 and TFAM expression was analyzed by immunohistochemistry using a tissue microarray. Expression of Nrf1 and TFAM was significantly increased in breast cancer tissue compared with adjacent normal tissues. In addition, patients positive for Nrf1 or TFAM had a poorer clinical prognosis than patients who were negative, and those positive for Nrf1 and TFAM had the shortest survival time. These results suggest that Nrf1 and TFAM are potential biomarkers for the determination of individualized therapy and the prognosis of breast cancer, and molecular targeting of Nrf1 and TFAM is a promising strategy for the sensitization of breast cancer cells to chemotherapeutics.
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Affiliation(s)
- Wei Gao
- Department of Radiation Oncology, Shanghai 9th People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai 200433, P.R. China.,Department of Oncology, Changhai Hospital, The Second Military Medical University, Shanghai 200433, P.R. China
| | - Meihong Wu
- Department of Oncology, Changhai Hospital, The Second Military Medical University, Shanghai 200433, P.R. China
| | - Ning Wang
- Department of Oncology, Changhai Hospital, The Second Military Medical University, Shanghai 200433, P.R. China
| | - Yingyi Zhang
- Department of Oncology, Changhai Hospital, The Second Military Medical University, Shanghai 200433, P.R. China
| | - Jing Hua
- Department of Oncology, Changhai Hospital, The Second Military Medical University, Shanghai 200433, P.R. China
| | - Gusheng Tang
- Department of Hematology, Changhai Hospital, The Second Military Medical University, Shanghai 200433, P.R. China
| | - Yajie Wang
- Department of Oncology, Changhai Hospital, The Second Military Medical University, Shanghai 200433, P.R. China
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11
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Fan W, Fan SS, Feng J, Xiao D, Fan S, Luo J. Elevated expression of HSP10 protein inhibits apoptosis and associates with poor prognosis of astrocytoma. PLoS One 2017; 12:e0185563. [PMID: 29028811 PMCID: PMC5640213 DOI: 10.1371/journal.pone.0185563] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Accepted: 09/14/2017] [Indexed: 11/18/2022] Open
Abstract
Astrocytoma is the most common type of primary malignant brain tumor, with pretty lowly 5-year survival rate in patients. Although extended surgical removal of the tumor and postoperative chemotherapy/radiotherapy executed, still there is large recurrence rate, mainly because diffuse glioma tumor cells ubiquitously infiltrate into normal parenchyma. So it becomes a priority to hunt novel molecular and signaling pathway targets to suppress astrocyma progression. HSP10, an important member of Heat shock proteins (Hsps) family, classically works as molecular chaperone folding or degradating of target proteins. Evolutionarily, HSP10 is also reported to be involved in immunomodulation and tumor progression. Poly (ADP-ribose) polymerase (PARP), important in DNA repair, is one of the main cleavage targets of caspase. And cleaved PARP (c-PARP) can serve as a marker of cells undergoing apoptosis. So far, whether the expression of HSP10 or c-PARP is associated with clinicopathologic implication for astrocytoma has not been reported. Meanwhile, it is unclear about the relationship between HSP10 and cell apoptosis. The purpose of this research is to elucidate the association between the expression of HSP10 and c-PARP and clinicopathological characteristics of astrocytoma by immunohistochemistry. The results showed that positive percentage of high HSP10 expression in astrocytoma 42/103, 40.8%) was significantly higher than that in the non-tumor control brain tissues (8/43, 18.6%) (P = 0.01). While no apparent difference of high c-PARP expression existed between astrocytoma and non-tumor control brain tissues. Furthermore, elevated expression of HSP10 was negative related to low expression of c-PARP (r = -0.224, P = 0.023), indicating high expression of HSP10 in astrocytoma inhibited apoptosis process effectively. And overexpression of HSP10 was proved to be the independent poor prognostic factor for astrocytoma by multivariate analysis. Taken together, our results suggest that elevated expression of HSP10 protein inhibits apoptosis and associates with poor prognosis of astrocytoma.
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Affiliation(s)
- Weibing Fan
- Department of Neurology, The Third Hospital of Changsha, Changsha, Hunan, China
| | - Shuang-Shi Fan
- Department of Surgery, Children′s Hospital of Hunan Province, Changsha, Hunan, China
| | - Juan Feng
- Department of Pathology, The Second Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - Desheng Xiao
- Department of Pathology, Xiangya Hospital Central South University, Changsha, Hunan, China
| | - Songqing Fan
- Department of Pathology, The Second Xiangya Hospital of Central South University, Changsha, Hunan, China
- * E-mail: (SF); (JL)
| | - Jiadi Luo
- Department of Pathology, The Second Xiangya Hospital of Central South University, Changsha, Hunan, China
- * E-mail: (SF); (JL)
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12
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Polymorphisms and mutations in GSTP1, RAD51, XRCC1 and XRCC3 genes in breast cancer patients. Int J Biol Markers 2017; 32:e337-e343. [PMID: 28315507 DOI: 10.5301/ijbm.5000258] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/15/2017] [Indexed: 01/12/2023]
Abstract
BACKGROUND Genotoxic factors, including ionizing radiation and oxidative stress, are associated with genomic instability and development of breast cancer (BC). The homologous recombination DNA repair (HRR) pathway, base excision repair (BER) mechanism, and antioxidative enzymes are required as defense mechanisms against these DNA damaging agents. GSTP1, XRCC1, XRCC3 and RAD51 proteins are essential components of antioxidation, BER and HRR of DNA, respectively. Deficiencies in BER, HRR and antioxidation pathways are involved in the progression of cancer. METHODS Genomic DNA was extracted from formalin-fixed, paraffin-embedded tissue and blood samples of BC patients of an Italian population. Genomic DNA was also extracted from blood specimens of a control group. DNA sequencing was performed for six single-nucleotide polymorphisms (SNPs) in the GSTP1, RAD51, XRCC1 and XRCC3 genes in BC patients and the control group. RESULTS Two variants in the 5'-UTR of the XRCC3 (rs1799794 A/G) and RAD51 (rs1801321) genes showed a significant association with susceptibility to BC (OR = 4.125; 95% CI 1.057-16.102; p = 0.03 and OR = 2.04; 95% CI 0.4925-8.449; p = 0.007, respectively). Additionally, we reported 2 mutations in intron 7 of the XRCC3 gene, CTdel (rs543072564) and A/G (rs369703243). CONCLUSIONS Our results underscored the existence of an association between XRCC3-5'-UTR-A/G (rs1799794) and RAD51-5'-UTR G172T (rs1801321) genotypes and BC risk in an Italian population. The presence of mutations in the intronic region of the XRCC3 gene highlights the importance of more sequence screening of DNA repair genes for possible genetic penetrance in BC.
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13
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Feng J, Luo J, Wang H, Lu J, Zhan Y, Zang H, Wen Q, Wang W, Chen L, Xu L, Chu S, Fan S. High expression of heat shock protein 10 (Hsp10) is associated with poor prognosis in oral squamous cell carcinoma. INTERNATIONAL JOURNAL OF CLINICAL AND EXPERIMENTAL PATHOLOGY 2017; 10:7784-7791. [PMID: 31966626 PMCID: PMC6965241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Accepted: 04/26/2017] [Indexed: 06/10/2023]
Abstract
Heat shock protein 10 (Hsp10), located in mitochondria, is a co-chaperone involved in the protein folding and aggregation with Hsp60. Besides, a wide range of other extramitochondrial and extracellular activities, such a mammalian mitochondrial chaperonin including modulation of apoptosis, inflammation, and carcinogenesis, have been reported. Expression of Hsp10 protein in oral squamous cell carcinomas (OSCC) and the non-cancerous squamous epithelium was detected using immunohistochemistry we retrospectively evaluated the correlations between Hsp10 expression and the clinicopathological characteristics of OSCC. Our results showed that percentage of high expression of Hsp10 in the OSCC was statistically higher than that in the non-cancerous squamous epithelium (P = 0.006). What is more, high Hsp10 expression was significantly associated with shorter overall survival in patients with OSCC (P<0.001). In addition, our results identified that the high expression of Hsp10 was significantly correlated with OSCC patients age, the history of chewing betel nut, pathological grade, lymph node metastasis and radiotherapy after operation (P = 0.008, P = 0.021, P = 0.026, P = 0.008, P = 0.049 respectively). Multivariate Cox regression analysis further identified that high expression of Hsp10 protein was an independent poor prognostic factor for OSCC (P<0.001). High Hsp10 expression might play important roles in the progression of OSCC, and it might act as a novel valuable independent biomarker to predict poor prognosis in patients with OSCC.
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Affiliation(s)
- Juan Feng
- Department of Pathology, The Second Xiangya Hospital, Central South UniversityChangsha, Hunan, China
| | - Jiadi Luo
- Department of Pathology, The Second Xiangya Hospital, Central South UniversityChangsha, Hunan, China
| | - Haiqing Wang
- Department of Stomatology, The Third Xiangya Hospital, Central South UniversityChangsha, Hunan, China
| | - Junmi Lu
- Department of Pathology, The Second Xiangya Hospital, Central South UniversityChangsha, Hunan, China
| | - Yuting Zhan
- Department of Pathology, The Second Xiangya Hospital, Central South UniversityChangsha, Hunan, China
| | - Hongjing Zang
- Department of Pathology, The Second Xiangya Hospital, Central South UniversityChangsha, Hunan, China
| | - Qiuyuan Wen
- Department of Pathology, The Second Xiangya Hospital, Central South UniversityChangsha, Hunan, China
| | - Weiyuan Wang
- Department of Pathology, The Second Xiangya Hospital, Central South UniversityChangsha, Hunan, China
| | - Lingjiao Chen
- Department of Pathology, The Second Xiangya Hospital, Central South UniversityChangsha, Hunan, China
| | - Lina Xu
- Department of Pathology, The Second Xiangya Hospital, Central South UniversityChangsha, Hunan, China
| | - Shuzhou Chu
- Department of Pathology, The Second Xiangya Hospital, Central South UniversityChangsha, Hunan, China
| | - Songqing Fan
- Department of Pathology, The Second Xiangya Hospital, Central South UniversityChangsha, Hunan, China
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14
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Hallajian Z, Mahjoubi F, Nafissi N. Simultaneous ATM/BRCA1/RAD51 expression variations associated with prognostic factors in Iranian sporadic breast cancer patients. Breast Cancer 2017; 24:624-634. [DOI: 10.1007/s12282-016-0750-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2016] [Accepted: 12/27/2016] [Indexed: 01/09/2023]
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15
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The Expression and Clinical Outcome of pCHK2-Thr68 and pCDC25C-Ser216 in Breast Cancer. Int J Mol Sci 2016; 17:ijms17111803. [PMID: 27801830 PMCID: PMC5133804 DOI: 10.3390/ijms17111803] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2016] [Revised: 09/23/2016] [Accepted: 10/12/2016] [Indexed: 02/08/2023] Open
Abstract
Checkpoint kinase 2 (CHK2) and cell division cycle 25C (CDC25C) are two proteins involved in the DNA damage response pathway, playing essential roles in maintaining genome integrity. As one of the major hallmarks of abnormal cellular division, genomic instability occurs in most cancers. In this study, we identified the functional expression of pCHK2-Thr68 and pCDC25C-Ser216 in breast cancer, as well as its association with breast cancer survival. Tissue microarray analysis using immunohistochemistry was constructed to identify the expression of pCHK2-Thr68 and pCDC25C-Ser216 in 292 female breast cancer patients. The relationship among protein expression, clinicopathological factors (e.g., human epidermal growth factor receptor 2 (HER 2), tumor size, tumor-node-metastasis (TNM) classification), and overall survival of the breast cancer tissues were analyzed using Pearson’s χ-square (χ2) test, Fisher’s exact test, multivariate logistic regression and Kaplan–Meier survival analysis. Significantly higher expressions of pCHK2-Thr68 and pCDC25C-Ser216 were observed in the nucleus of the breast cancer cells compared to the paracancerous tissue (pCHK2-Thr68, 20.38% vs. 0%; pCDC25C-Ser216, 82.26% vs. 24.24%). The expression of pCHK2-Thr68 and pCDC25C-Ser216 in breast cancer showed a positive linear correlation (p = 0.026). High expression of pCHK2-Thr68 was associated with decreased patient survival (p = 0.001), but was not an independent prognostic factor. Our results suggest that pCHK2-Thr68 and pCDC25C-Ser216 play important roles in breast cancer and may be potential treatment targets.
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16
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Alshareeda AT, Negm OH, Aleskandarany MA, Green AR, Nolan C, TigHhe PJ, Madhusudan S, Ellis IO, Rakha EA. Clinical and biological significance of RAD51 expression in breast cancer: a key DNA damage response protein. Breast Cancer Res Treat 2016; 159:41-53. [DOI: 10.1007/s10549-016-3915-8] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2015] [Accepted: 07/15/2016] [Indexed: 01/15/2023]
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17
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Yang L, Liu L, Xu Z, Liao W, Feng D, Dong X, Xu S, Xiao L, Lu J, Luo X, Tang M, Bode AM, Dong Z, Sun L, Cao Y. EBV-LMP1 targeted DNAzyme enhances radiosensitivity by inhibiting tumor angiogenesis via the JNKs/HIF-1 pathway in nasopharyngeal carcinoma. Oncotarget 2016; 6:5804-17. [PMID: 25714020 PMCID: PMC4467403 DOI: 10.18632/oncotarget.3331] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2014] [Accepted: 01/03/2015] [Indexed: 02/05/2023] Open
Abstract
LMP1, which is encoded by the Epstein-Barr virus, is proposed to be one of the major oncogenic factors involved in nasopharyngeal carcinoma (NPC). Previous studies demonstrated that down-regulation of LMP1 by LMP1-targeted DNAzyme (DZ1) increases the radiosensitivity of NPC. However, the mechanism by which DZ1 contributes to this radiosensitivity remains unclear. In this study, we determined whether a DZ1 blockade of LMP1 expression has an overall positive effect on the radiotherapy of NPCs by repressing HIF-1/VEGF activity and to investigate the mechanisms underlying LMP1-induced HIF-1 activation in NPC cells. The results showed that DZ1 inhibited the microtubule-forming ability of HUVECs co-cultured with NPC cells, which occurs with the down-regulation of VEGF expression and secretion. Moreover, LMP1 increases phosphorylated JNKs/c-Jun signaling, which is involved in the regulation of HIF-1/VEGF activity. After silencing LMP1 and decreasing phosphorylation of JNKs, NPC cells exhibited an enhanced radiosensitivity. Furthermore, in vivo experiments revealed a significant inhibition of tumor growth and a marked reduction of the Ktrans parameter, which reflects the condition of tumor micro-vascular permeability. Taken together, our data suggested that VEGF expression is increased by LMP1 through the JNKs/c-Jun signaling pathway and indicated that DZ1 enhances the radiosensitivity of NPC cells by inhibiting HIF-1/VEGF activity.
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Affiliation(s)
- Lifang Yang
- Cancer Research Institute, Key Laboratory of Chinese Ministry of Education, Xiangya School of Medicine, Central South University, Changsha, China.,Center for Molecular Medicine, Xiangya Hospital, Central South University, Changsha, China
| | - Liyu Liu
- Cancer Research Institute, Key Laboratory of Chinese Ministry of Education, Xiangya School of Medicine, Central South University, Changsha, China
| | - Zhijie Xu
- Cancer Research Institute, Key Laboratory of Chinese Ministry of Education, Xiangya School of Medicine, Central South University, Changsha, China
| | - Weihua Liao
- Department of Radiology, Xiangya Hospital, Central South University, Changsha, China
| | - Deyun Feng
- Department of Pathology, Xiangya Hospital, Central South University, Changsha, China
| | - Xin Dong
- Cancer Research Institute, Key Laboratory of Chinese Ministry of Education, Xiangya School of Medicine, Central South University, Changsha, China
| | - San Xu
- Cancer Research Institute, Key Laboratory of Chinese Ministry of Education, Xiangya School of Medicine, Central South University, Changsha, China
| | - Lanbo Xiao
- Cancer Research Institute, Key Laboratory of Chinese Ministry of Education, Xiangya School of Medicine, Central South University, Changsha, China
| | - Jingchen Lu
- Cancer Research Institute, Key Laboratory of Chinese Ministry of Education, Xiangya School of Medicine, Central South University, Changsha, China
| | - Xiangjian Luo
- Cancer Research Institute, Key Laboratory of Chinese Ministry of Education, Xiangya School of Medicine, Central South University, Changsha, China
| | - Min Tang
- Cancer Research Institute, Key Laboratory of Chinese Ministry of Education, Xiangya School of Medicine, Central South University, Changsha, China
| | - Ann M Bode
- The Hormel Institute, University of Minnesota, Austin, MN, USA
| | - Zigang Dong
- The Hormel Institute, University of Minnesota, Austin, MN, USA
| | - Lunquan Sun
- Center for Molecular Medicine, Xiangya Hospital, Central South University, Changsha, China
| | - Ya Cao
- Cancer Research Institute, Key Laboratory of Chinese Ministry of Education, Xiangya School of Medicine, Central South University, Changsha, China
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18
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Li J, Wen Q, Xu L, Wang W, Luo J, Chu S, Xie G, Shi L, Huang D, Li J, Fan S. Fatty acid synthase–associated protein with death domain: a prognostic factor for survival in patients with nasopharyngeal carcinoma. Hum Pathol 2014; 45:2447-52. [DOI: 10.1016/j.humpath.2014.08.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/07/2014] [Revised: 08/07/2014] [Accepted: 08/13/2014] [Indexed: 11/29/2022]
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19
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Activation of Akt/mTOR pathway is associated with poor prognosis of nasopharyngeal carcinoma. PLoS One 2014; 9:e106098. [PMID: 25165983 PMCID: PMC4148345 DOI: 10.1371/journal.pone.0106098] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2014] [Accepted: 07/23/2014] [Indexed: 12/21/2022] Open
Abstract
Nasopharyngeal carcinoma (NPC) is a malignant tumor of the head and neck region, which frequently occurs in Southeast Asia, especially in the south of China. It is known that the mammalian target of rapamycin (mTOR) pathway plays a central role in regulating cellular functions, including proliferation, growth, survival, mobility, and angiogenesis. Aberrant expression of the mTOR signaling pathway molecules has been found in many types of cancer. However, whether the alterations of p-Akt, p-p70S6K and p-4EBP1 protein expression are associated with clinicopathological features and prognostic implications in NPC have not been reported. The purposes of the present study are to investigate the association between the expression of p-Akt, p-p70S6K and p-4EBP1 proteins and clinicopathological features in NPC by immunohistochemistry. The results showed that the positive percentage of p-Akt, p-p70S6K and p-4EBP1 proteins expression in NPC (47.2%, 73.0% and 61.7%, respectively) was significantly higher than that in the non-cancerous nasopharyngeal control tissue (33.3%, 59.1% and 47.0%, respectively). There was a significantly higher positive expression of p-Akt in undifferentiated non-keratinizing nasopharyngeal carcinoma than that in differentiated non-keratinizing nasopharyngeal carcinoma (P = 0.014). Additionally, positive expression of p-p70S6K and p-4EBP1 proteins, and positive expression of either of p-Akt, p-p70S6K and p-4EBP1 were significantly correlated inversely with overall survival rates of NPC patients (P = 0.023, P = 0.033, P = 0.008, respectively). Spearman’s rank correlation test showed that expression of p-Akt in NPC was significantly associated with expression of p-p70S6K (r = 0.263, P<0.001) and p-4EBP1(r = 0.284, P<0.001). Also there was an obviously positive association between expression of p-p70S6K and p-4EBP1 proteins in NPC (r = 0.286, P<0.001). Multivariate Cox regression analysis further identified positive expression of p-4EBP1 and p-p70S6K proteins were the independent poor prognostic factors for NPC (P = 0.043, P = 0.027, respectively). Taken together, high expression of p-p70S6K and p-4EBP1 proteins may act as valuable independent biomarkers to predict a poor prognosis of NPC.
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20
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Luo J, Wen Q, Li J, Xu L, Chu S, Wang W, Shi L, Xie G, Huang D, Fan S. Increased expression of IRS-1 is associated with lymph node metastasis in nasopharyngeal carcinoma. INTERNATIONAL JOURNAL OF CLINICAL AND EXPERIMENTAL PATHOLOGY 2014; 7:6117-6124. [PMID: 25337259 PMCID: PMC4203230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 07/02/2014] [Accepted: 08/20/2014] [Indexed: 06/04/2023]
Abstract
Nasopharyngeal carcinoma (NPC) is a head and neck malignant tumor rare throughout most of the world but common in Southeast Asia, especially in Southern China, which is with characteristics of early cervical lymph node metastasis and high incidence rate of distant metastasis. Insulin receptor substrate 1 (IRS-1) is a signaling adapter protein that is encoded by the IRS-1 gene in humans, plays an important role in the development, progression, invasion and metastasis of tumors. The aim of the present study was to investigate the association between the expression of IRS-1 protein and clinicopathological characteristics in NPC by immunohistochemistry. The results showed that the expression level of IRS-1 was significant higher in NPC than that in the control nasopharyngeal epithelia (P = 0.042). The positive percentage of IRS-1 expression in NPC with lymph node metastasis was also significantly higher than those without lymph node metastasis (P = 0.008). Positive expression of IRS-1 was proved to be the independent predicted factor for lymph node metastasis of NPC (P = 0.025) regardless of age, gender, histological type and clinical stages by multivariate logistic regression analysis. In addition, results showed higher sensitivity and agreement rate of IRS-1 for predicting lymph node metastasis of NPC patients. Taken together, high expression of IRS-1 might be closely correlated with lymph node metastasis in NPC and positive expression of IRS-1 could be used as an independent biomarker for predicting lymph node metastasis of NPC.
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Affiliation(s)
- Jiadi Luo
- Department of Pathology, The Second Xiangya Hospital, Central South UniversityChangsha, Hunan, China
| | - Qiuyuan Wen
- Department of Pathology, The Second Xiangya Hospital, Central South UniversityChangsha, Hunan, China
| | - Jiao Li
- Department of Pathology, The Second Xiangya Hospital, Central South UniversityChangsha, Hunan, China
| | - Lina Xu
- Department of Pathology, The Second Xiangya Hospital, Central South UniversityChangsha, Hunan, China
| | - Shuzhou Chu
- Department of Pathology, The Second Xiangya Hospital, Central South UniversityChangsha, Hunan, China
| | - Weiyuan Wang
- Department of Pathology, The Second Xiangya Hospital, Central South UniversityChangsha, Hunan, China
| | - Lei Shi
- Department of Pathology, The Second Xiangya Hospital, Central South UniversityChangsha, Hunan, China
| | - Guiyuan Xie
- Department of Oncology, The Second Xiangya Hospital, Central South UniversityChangsha, Hunan, China
| | - Donghai Huang
- Department of Otorhinolaryngology, Xiangya Hospital, Central South UniversityChangsha, Hunan, China
| | - Songqing Fan
- Department of Pathology, The Second Xiangya Hospital, Central South UniversityChangsha, Hunan, China
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