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Kaur R, Suresh PK. Chemoresistance Mechanisms in Non-Small Cell Lung Cancer-Opportunities for Drug Repurposing. Appl Biochem Biotechnol 2024; 196:4382-4438. [PMID: 37721630 DOI: 10.1007/s12010-023-04595-7] [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] [Accepted: 05/26/2023] [Indexed: 09/19/2023]
Abstract
Globally, lung cancer contributes significantly to the public health burden-associated mortality. As this form of cancer is insidious in nature, there is an inevitable diagnostic delay leading to chronic tumor development. Non-small cell lung cancer (NSCLC) constitutes 80-85% of all lung cancer cases, making this neoplasia form a prevalent subset of lung carcinoma. One of the most vital aspects for proper diagnosis, prognosis, and adequate therapy is the precise classification of non-small cell lung cancer based on biomarker expression profiling. This form of biomarker profiling has provided opportunities for improvements in patient stratification, mechanistic insights, and probable druggable targets. However, numerous patients have exhibited numerous toxic side effects, tumor relapse, and development of therapy-based chemoresistance. As a result of these exacting situations, there is a dire need for efficient and effective new cancer therapeutics. De novo drug development approach is a costly and tedious endeavor, with an increased attrition rate, attributed, in part, to toxicity-related issues. Drug repurposing, on the other hand, when combined with computer-assisted systems biology approach, provides alternatives to the discovery of new, efficacious, and safe drugs. Therefore, in this review, we focus on a comparison of the conventional therapy-based chemoresistance mechanisms with the repurposed anti-cancer drugs from three different classes-anti-parasitic, anti-depressants, and anti-psychotics for cancer treatment with a primary focus on NSCLC therapeutics. Certainly, amalgamating these novel therapeutic approaches with that of the conventional drug regimen in NSCLC-affected patients will possibly complement/synergize the existing therapeutic modalities. This approach has tremendous translational significance, since it can combat drug resistance and cytotoxicity-based side effects and provides a relatively new strategy for possible application in therapy of individuals with NSCLC.
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Affiliation(s)
- Rajdeep Kaur
- Department of Bio-Medical Sciences, School of Biosciences and Technology, VIT University, Vellore, 632014, Tamil Nadu, India
| | - P K Suresh
- Department of Bio-Medical Sciences, School of Biosciences and Technology, VIT University, Vellore, 632014, Tamil Nadu, India.
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Ye JH, Yu J, Huang MY, Mo YM. The correlation study between TOP2A gene expression in circulating tumor cells and chemotherapeutic drug resistance of patients with breast cancer. Breast Cancer 2024; 31:417-425. [PMID: 38561479 PMCID: PMC11045578 DOI: 10.1007/s12282-024-01553-x] [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: 06/16/2023] [Accepted: 02/11/2024] [Indexed: 04/04/2024]
Abstract
BACKGROUND Patients with breast cancer (BC) at advanced stages have poor outcomes because of high rate of recurrence and metastasis. Biomarkers for predicting prognosis remain to be explored. This study aimed to evaluate the relationships between circulating tumor cells (CTCs) and outcomes of BC patients. PATIENTS AND METHODS A total of 50 female were enrolled in this study. Their diagnoses were determined by clinical characteristics, image data, and clinical pathology. CTC subtypes and TOP2A gene expression on CTCs were detected by CanPatrol™ technology and triple color in situ RNA hybridization (RNA-ISH), which divided into epithelial CTCs (eCTCs), mesenchymal CTCs (MCTCs), and hybrid CTCs (HCTCs) based on their surface markers. Hormone receptor, including estrogen receptor (ER), progesterone receptor (PR), and human epidermal growth factor receptor 2 (HER-2) expression, was measured by immunohistochemistry (IHC) method before treatment. The risk factors for predicting recurrence and metastasis were calculated by COX risk regression model. The progression-free survival (PFS) of patients was determined using Kaplan-Meier survival curve. RESULTS The patients with a large tumor size (≥ 3 cm) and advanced tumor node metastasis (TNM) stages had high total CTCs (TCTCs) (P < 0.05). These patients also had high TOP2A expression level. COX risk regression analysis indicated that TOP2A expression levels in TCTCs, ER + , HER-2 + , and TNM stages were critical risk factors for recurrence and metastasis of patients (P < 0.05). The PFS of patients with ≥ 5 TCTCs, ≥ 3 HCTCs, and positive TOP2A expression in ≥ 3 TCTCs was significantly longer than that in patient with < 5 TCTCs, < 3 HCTCs, and TOP2A expression in < 3 TCTCs (P < 0.05). In contrast, the PFS of patients with positive hormone receptors (ER + , PR + , HER-2 +) also was dramatically lived longer than that in patients with negative hormone receptor expression. CONCLUSIONS High TCTC, HCTCs, and positive TOP2A gene expression on CTCs were critical biomarkers for predicting outcomes of BC patients. Positive hormone receptor expression in BC patients has significant favor PFS.
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MESH Headings
- Humans
- Female
- Neoplastic Cells, Circulating/metabolism
- Neoplastic Cells, Circulating/pathology
- Breast Neoplasms/pathology
- Breast Neoplasms/genetics
- Breast Neoplasms/drug therapy
- DNA Topoisomerases, Type II/genetics
- DNA Topoisomerases, Type II/metabolism
- Middle Aged
- Drug Resistance, Neoplasm/genetics
- Biomarkers, Tumor/genetics
- Biomarkers, Tumor/metabolism
- Adult
- Aged
- Receptor, ErbB-2/metabolism
- Prognosis
- Receptors, Estrogen/metabolism
- Poly-ADP-Ribose Binding Proteins/genetics
- Poly-ADP-Ribose Binding Proteins/metabolism
- Neoplasm Recurrence, Local/pathology
- Neoplasm Recurrence, Local/genetics
- Receptors, Progesterone/metabolism
- Gene Expression Regulation, Neoplastic
- Progression-Free Survival
- Kaplan-Meier Estimate
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Affiliation(s)
- Jin-Hui Ye
- Department of Breast Disease, The First People's Hospital of Zhaoqing, Zhaoqing, 526021, Guangdong, China
| | - Jian Yu
- Department of Breast Disease, The First People's Hospital of Zhaoqing, Zhaoqing, 526021, Guangdong, China
| | - Ming-Ying Huang
- Department of Breast Disease, The First People's Hospital of Zhaoqing, Zhaoqing, 526021, Guangdong, China.
| | - Yue-Mei Mo
- Department of Breast Disease, The First People's Hospital of Zhaoqing, Zhaoqing, 526021, Guangdong, China.
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3
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Mechanisms of resistance to chemotherapy in non-small cell lung cancer. Arch Pharm Res 2021; 44:146-164. [PMID: 33608812 DOI: 10.1007/s12272-021-01312-y] [Citation(s) in RCA: 64] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Accepted: 01/16/2021] [Indexed: 02/07/2023]
Abstract
Non-small cell lung cancer (NSCLC), which represents 80-85% of lung cancer cases, is one of the leading causes of human death worldwide. The majority of patients undergo an intensive and invasive treatment regimen, which may include radiotherapy, chemotherapy, targeted therapy, immunotherapy, or a combination of these, depending on disease stage and performance status. Despite advances in therapeutic regimens, the 5-year survival of NSCLC is approximately 20-30%, largely due to diagnosis at advanced stages. Conventional chemotherapy is still the standard treatment option for patients with NSCLC, especially those with advanced disease. However, the emergence of resistance to chemotherapeutic agents (chemoresistance) poses a significant obstacle to the management of patients with NSCLC. Therefore, to develop efficacious chemotherapeutic approaches for NSCLC, it is necessary to understand the mechanisms underlying chemoresistance. Several mechanisms are known to mediate chemoresistance. These include altered cellular targets for chemotherapy, decreased cellular drug concentrations, blockade of chemotherapy-induced cell cycle arrest and apoptosis, acquisition of epithelial-mesenchymal transition and cancer stem cell-like phenotypes, deregulated expression of microRNAs, epigenetic modulation, and the interaction with tumor microenvironments. In this review, we summarize the mechanisms underlying chemoresistance and tumor recurrence in NSCLC and discuss potential strategies to avoid or overcome chemoresistance.
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Cai J, Cai H, Chen J, Yang X. Identifying "Many-to-Many" Relationships between Gene-Expression Data and Drug-Response Data via Sparse Binary Matching. IEEE/ACM TRANSACTIONS ON COMPUTATIONAL BIOLOGY AND BIOINFORMATICS 2020; 17:165-176. [PMID: 29994482 DOI: 10.1109/tcbb.2018.2849708] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Identifying gene-drug patterns is a critical step in pharmacology for unveiling disease mechanisms and drug discovery. The availability of high-throughput technologies accumulates massive large-scale pharmacological and genomic data, and thus provides a new substantial opportunity to deeply understand how the oncogenic genes and the therapeutic drugs relate to each other. However, most previous studies merely used the pharmacological and genomic datasets without any prior knowledge to infer the gene-drug patterns. Here, we proposed a novel network-guided sparse binary matching model (NSBM) to decode these relationships hidden in the datasets. Not only the large-scale gene-expression data and drug-response data are jointly analyzed in our method, but also the additional prior information of genes and drugs are integrated into the form of network-based regularization. The essential structure of the NSBM model is a convex quadratic minimization problem with network-based penalties. It was demonstrated to be superior when compared with two benchmark methods through extensive experiments on both synthetic and empirical data. Posterior validation, including gene-ontology and enrichment analysis, confirmed the effectiveness of NSBM in revealing gene-drug patterns on a large-scale heterogeneous data source.
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Jeon KH, Yu HV, Kwon Y. Hyperactivated m-calpain affects acquisition of doxorubicin resistance in breast cancer cells. Biochim Biophys Acta Gen Subj 2018; 1862:1126-1133. [DOI: 10.1016/j.bbagen.2018.02.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Revised: 12/26/2017] [Accepted: 02/04/2018] [Indexed: 11/16/2022]
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Barrera-Rodríguez R, Fuentes JM. Multidrug resistance characterization in multicellular tumour spheroids from two human lung cancer cell lines. Cancer Cell Int 2015. [PMID: 26221079 PMCID: PMC4517505 DOI: 10.1186/s12935-015-0200-6] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Background Most of the knowledge about the mechanisms of multidrug resistance in lung cancer has been achieved through the use of cell lines isolated from tumours cultivated either in suspensions of isolated cells or in monolayers and following exposition to different cytostatic agents. However, tumour cell lines growing as multicellular tumour spheroids (MTS) frequently develop multicellular resistance in a drug-independent form. The aim of this study was to characterize the phenotypic and functional differences between two human NSCLC cell lines (INER-37 and INER-51) grown as traditional monolayer cultures versus as MTS. Methods After 72 hours treatment with anticancer drugs, chemosensitivity in monolayers and tumour spheroids cultures was assessed using MTT assay. Reverse transcription-polymerase chain reaction was employed to detect the mRNAs of multidrug resistance-related genes. The expression of P-gp was analyzed by immunohistochemical staining and cell cycle profiles were analyzed using FACS. Results The results indicate that when grown as MTS each lung cancer cell line had different morphologies as well as and abrogation of cell proliferation with decrease of the G2/M phase. Also, MTS acquired multicellular resistance to several chemotherapeutic agents in only a few days of culture which were accomplished by significant changes in the expression of MDR-related genes. Conclusion Overall, the MTS culture changed the cellular response to drugs nevertheless each of the cell lines studied seems to implement different mechanisms to acquire multicellular resistance.
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Affiliation(s)
- Raúl Barrera-Rodríguez
- Departamento Bioquímica y Medicina Ambiental., Instituto Nacional de Enfermedades Respiratorias, Clza. Tlalpan, 4502, Col Sec. XVI., Mexico, 14080 Mexico
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Ávila-Moreno F, Armas-López L, Álvarez-Moran AM, López-Bujanda Z, Ortiz-Quintero B, Hidalgo-Miranda A, Urrea-Ramírez F, Rivera-Rosales RM, Vázquez-Manríquez E, Peña-Mirabal E, Morales-Gómez J, Vázquez-Minero JC, Téllez-Becerra JL, Ramírez-Mendoza R, Ávalos-Bracho A, de Alba EG, Vázquez-Santillán K, Maldonado-Lagunas V, Santillán-Doherty P, Piña-Sánchez P, Zúñiga-Ramos J. Overexpression of MEOX2 and TWIST1 is associated with H3K27me3 levels and determines lung cancer chemoresistance and prognosis. PLoS One 2014; 9:e114104. [PMID: 25460568 PMCID: PMC4252097 DOI: 10.1371/journal.pone.0114104] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2014] [Accepted: 10/29/2014] [Indexed: 12/26/2022] Open
Abstract
Lung cancer is the leading cause of death from malignant diseases worldwide, with the non-small cell (NSCLC) subtype accounting for the majority of cases. NSCLC is characterized by frequent genomic imbalances and copy number variations (CNVs), but the epigenetic aberrations that are associated with clinical prognosis and therapeutic failure remain not completely identify. In the present study, a total of 55 lung cancer patients were included and we conducted genomic and genetic expression analyses, immunohistochemical protein detection, DNA methylation and chromatin immunoprecipitation assays to obtain genetic and epigenetic profiles associated to prognosis and chemoresponse of NSCLC patients. Finally, siRNA transfection-mediated genetic silencing and cisplatinum cellular cytotoxicity assays in NSCLC cell lines A-427 and INER-37 were assessed to describe chemoresistance mechanisms involved. Our results identified high frequencies of CNVs (66–51% of cases) in the 7p22.3–p21.1 and 7p15.3–p15.2 cytogenetic regions. However, overexpression of genes, such as MEOX2, HDAC9, TWIST1 and AhR, at 7p21.2–p21.1 locus occurred despite the absence of CNVs and little changes in DNA methylation. In contrast, the promoter sequences of MEOX2 and TWIST1 displayed significantly lower/decrease in the repressive histone mark H3K27me3 and increased in the active histone mark H3K4me3 levels. Finally these results correlate with poor survival in NSCLC patients and cellular chemoresistance to oncologic drugs in NSCLC cell lines in a MEOX2 and TWIST1 overexpression dependent-manner. In conclusion, we report for the first time that MEOX2 participates in chemoresistance irrespective of high CNV, but it is significantly dependent upon H3K27me3 enrichment probably associated with aggressiveness and chemotherapy failure in NSCLC patients, however additional clinical studies must be performed to confirm our findings as new probable clinical markers in NSCLC patients.
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Affiliation(s)
- Federico Ávila-Moreno
- Universidad Nacional Autónoma de México (UNAM), Facultad de Estudios Superiores (FES)-Iztacala, Biomedicine Research Unit (UBIMED), Cancer Epigenomics Laboratory 12, Tlalnepantla, Mexico State, Mexico; Instituto Nacional de Enfermedades Respiratorias (INER), Mexico City, Mexico
| | - Leonel Armas-López
- Universidad Nacional Autónoma de México (UNAM), Facultad de Estudios Superiores (FES)-Iztacala, Biomedicine Research Unit (UBIMED), Cancer Epigenomics Laboratory 12, Tlalnepantla, Mexico State, Mexico
| | | | - Zoila López-Bujanda
- Universidad Nacional Autónoma de México (UNAM), Facultad de Estudios Superiores (FES)-Iztacala, Biomedicine Research Unit (UBIMED), Cancer Epigenomics Laboratory 12, Tlalnepantla, Mexico State, Mexico; Instituto Nacional de Enfermedades Respiratorias (INER), Mexico City, Mexico; Johns Hopkins University, Medical Institutions, Maryland, Baltimore, United States of America
| | | | | | | | | | | | - Erika Peña-Mirabal
- Instituto Nacional de Enfermedades Respiratorias (INER), Mexico City, Mexico
| | - José Morales-Gómez
- Instituto Nacional de Enfermedades Respiratorias (INER), Mexico City, Mexico
| | | | | | - Roberto Ramírez-Mendoza
- Universidad Nacional Autónoma de México (UNAM), Facultad de Estudios Superiores (FES)-Iztacala, Biomedicine Research Unit (UBIMED), Cancer Epigenomics Laboratory 12, Tlalnepantla, Mexico State, Mexico
| | | | | | | | | | | | - Patricia Piña-Sánchez
- Unidad de Investigación Médica en Enfermedades Oncológicas (UIMEO), Instituto Mexicano del Seguro Social (IMSS), Centro Médico Nacional (CMN), Siglo XXI, México City, México
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Involvement of human topoisomerase II isoforms in HIV-1 reverse transcription. Arch Biochem Biophys 2013; 532:91-102. [PMID: 23399433 DOI: 10.1016/j.abb.2013.01.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2012] [Revised: 01/28/2013] [Accepted: 01/30/2013] [Indexed: 11/20/2022]
Abstract
HIV-1 reverse transcription (RTn) involves synthesis of double strand DNA (dsDNA) from viral genomic RNA. Topoisomerase II (Topo II) alpha and beta maintains topological reorganization of dsDNA regions and catalytic inhibition of these isoforms repressed viral replicative cycle. Present study is aimed to understand the role of Topo II isoforms in HIV-1 early replication. Topo IIα and β showed differential expression in SupT1 cells and PBMCs during early hours of HIV-1 infection where Topo IIα expression increased after 4h, while Topo IIβ showed relatively higher expression at 1 and 4h. In Topo IIα and/or β down regulated cells, transcription of viral genes gag, pol and env as well as proviral DNA synthesis was abolished. In Topo IIα and/or β down regulated cells, strong stop DNA synthesis was unaffected while other downstream events of reverse transcription such as first strand transfer, full length minus strand synthesis, and second strand transfer were completely inhibited, which affects HIV-1 replication. Further, co-localization of Topo II isoforms with HIV-1 reverse transcriptase was observed in SupT1 cells and PBMCs by immunofluorescence. These results collectively suggest a role of Topo II isoforms during HIV-1 RTn probably by promoting the alignment of viral RNA-DNA hybrids.
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Mouse mammary tumor virus-like gene sequences are present in lung patient specimens. Virol J 2011; 8:451. [PMID: 21943279 PMCID: PMC3198956 DOI: 10.1186/1743-422x-8-451] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2011] [Accepted: 09/24/2011] [Indexed: 11/11/2022] Open
Abstract
Background Previous studies have reported on the presence of Murine Mammary Tumor Virus (MMTV)-like gene sequences in human cancer tissue specimens. Here, we search for MMTV-like gene sequences in lung diseases including carcinomas specimens from a Mexican population. This study was based on our previous study reporting that the INER51 lung cancer cell line, from a pleural effusion of a Mexican patient, contains MMTV-like env gene sequences. Results The MMTV-like env gene sequences have been detected in three out of 18 specimens studied, by PCR using a specific set of MMTV-like primers. The three identified MMTV-like gene sequences, which were assigned as INER6, HZ101, and HZ14, were 99%, 98%, and 97% homologous, respectively, as compared to GenBank sequence accession number AY161347. The INER6 and HZ-101 samples were isolated from lung cancer specimens, and the HZ-14 was isolated from an acute inflammatory lung infiltrate sample. Two of the env sequences exhibited disruption of the reading frame due to mutations. Conclusion In summary, we identified the presence of MMTV-like gene sequences in 2 out of 11 (18%) of the lung carcinomas and 1 out of 7 (14%) of acute inflamatory lung infiltrate specimens studied of a Mexican Population.
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Stewart DJ. Tumor and host factors that may limit efficacy of chemotherapy in non-small cell and small cell lung cancer. Crit Rev Oncol Hematol 2010; 75:173-234. [PMID: 20047843 PMCID: PMC2888634 DOI: 10.1016/j.critrevonc.2009.11.006] [Citation(s) in RCA: 152] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2009] [Revised: 11/19/2009] [Accepted: 11/27/2009] [Indexed: 12/19/2022] Open
Abstract
While chemotherapy provides useful palliation, advanced lung cancer remains incurable since those tumors that are initially sensitive to therapy rapidly develop acquired resistance. Resistance may arise from impaired drug delivery, extracellular factors, decreased drug uptake into tumor cells, increased drug efflux, drug inactivation by detoxifying factors, decreased drug activation or binding to target, altered target, increased damage repair, tolerance of damage, decreased proapoptotic factors, increased antiapoptotic factors, or altered cell cycling or transcription factors. Factors for which there is now substantial clinical evidence of a link to small cell lung cancer (SCLC) resistance to chemotherapy include MRP (for platinum-based combination chemotherapy) and MDR1/P-gp (for non-platinum agents). SPECT MIBI and Tc-TF scanning appears to predict chemotherapy benefit in SCLC. In non-small cell lung cancer (NSCLC), the strongest clinical evidence is for taxane resistance with elevated expression or mutation of class III beta-tubulin (and possibly alpha tubulin), platinum resistance and expression of ERCC1 or BCRP, gemcitabine resistance and RRM1 expression, and resistance to several agents and COX-2 expression (although COX-2 inhibitors have had minimal impact on drug efficacy clinically). Tumors expressing high BRCA1 may have increased resistance to platinums but increased sensitivity to taxanes. Limited early clinical data suggest that chemotherapy resistance in NSCLC may also be increased with decreased expression of cyclin B1 or of Eg5, or with increased expression of ICAM, matrilysin, osteopontin, DDH, survivin, PCDGF, caveolin-1, p21WAF1/CIP1, or 14-3-3sigma, and that IGF-1R inhibitors may increase efficacy of chemotherapy, particularly in squamous cell carcinomas. Equivocal data (with some positive studies but other negative studies) suggest that NSCLC tumors with some EGFR mutations may have increased sensitivity to chemotherapy, while K-ras mutations and expression of GST-pi, RB or p27kip1 may possibly confer resistance. While limited clinical data suggest that p53 mutations are associated with resistance to platinum-based therapies in NSCLC, data on p53 IHC positivity are equivocal. To date, resistance-modulating strategies have generally not proven clinically useful in lung cancer, although small randomized trials suggest a modest benefit of verapamil and related agents in NSCLC.
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Affiliation(s)
- David J Stewart
- Department of Thoracic/Head & Neck Medical Oncology, MD Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, TX 77030, USA.
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Stewart DJ. Lung Cancer Resistance to Chemotherapy. Lung Cancer 2010. [DOI: 10.1007/978-1-60761-524-8_15] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Faggad A, Darb-Esfahani S, Wirtz R, Sinn B, Sehouli J, Könsgen D, Lage H, Weichert W, Noske A, Budczies J, Müller BM, Buckendahl AC, Röske A, Eldin Elwali N, Dietel M, Denkert C. Topoisomerase IIalpha mRNA and protein expression in ovarian carcinoma: correlation with clinicopathological factors and prognosis. Mod Pathol 2009; 22:579-88. [PMID: 19270648 DOI: 10.1038/modpathol.2009.14] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Topoisomerase IIalpha (Top IIalpha) is a nuclear enzyme that plays a central role in DNA metabolism, and is a molecular target for a variety of chemotherapeutic agents. Top IIalpha has recently gained attention as a biomarker for therapy response and patient survival. In this study, we attempted to assess the feasibility of measuring Top IIalpha gene expression in RNA, isolated from archival formalin-fixed paraffin-embedded tissue specimens, which are used routinely in pathology laboratories. We have employed a new technique on the basis of magnetic particles' separation and purification of nucleic acids, and evaluated both protein and mRNA expressions from the same routinely processed tissue blocks. We investigated the expression of Top IIalpha mRNA and protein by real-time reverse transcription polymerase chain reaction and immunohistochemistry, in a cohort of 133 primary ovarian carcinomas, and evaluated the association between Top IIalpha expression and clincopathological variables as well as patient outcome. Elevated Top IIalpha mRNA expression was observed in high-grade tumors (P=0.003) and advanced stage disease (P=0.011). In univariate Kaplan-Meier analysis, patients with higher expression of Top IIalpha nuclear protein had a significantly decreased overall survival (P=0.045). Interestingly, we detected cytoplasmic protein expression of Top IIalpha in a subset of samples. Cytoplasmic expression of Top IIalpha was associated with the expression of chromosomal region maintenance/exportin 1 (CRM1)-a nuclear export protein (P=0.008). Our study suggests that Top IIalpha overexpression is involved in the progression of ovarian cancer in a subset of the patients. Our results encourage the further evaluation of the prognostic and predictive values of Top IIalpha expression in ovarian carcinoma, which might help to assess the patients' risk profile, and the planning of an individualized therapy.
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Affiliation(s)
- Areeg Faggad
- Institute of Pathology, Charité University Hospital, Berlin, Germany
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Abstract
Eukaryotic type II topoisomerases (Topo II) are implicated in a wide range of cellular processes. Cells in which Topo II protein has been specifically depleted or mutated provide powerful systems for analysing the normal in vivo functions of Topo II proteins and for assessing their roles in various chemotherapy regimens. Summarised here are the ways in which Topo II has been depleted or mutated in animal cells and the type of information gleaned. The cell lines generated are tabulated and represent a useful resource for further in vivo studies of Topo II function, one that we expect to grow in size and utility in the coming years.
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Affiliation(s)
- Andrew C G Porter
- Department of Haematology, Imperial College Faculty of Medicine, London, UK
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14
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Zapata-Benavides P, Saavedra-Alonso S, Zamora-Avila D, Vargas-Rodarte C, Barrera-Rodríguez R, Salinas-Silva J, Rodríguez-Padilla C, Tamez-Guerra R, Trejo-Avila L. Mouse mammary tumor virus-like gene sequences in breast cancer samples of Mexican women. Intervirology 2007; 50:402-7. [PMID: 17975321 DOI: 10.1159/000110652] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2007] [Accepted: 08/08/2007] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Previous reports related the presence of mouse mammary tumor virus (MMTV)-like gene sequences to human breast carcinoma. The aim of this study was to determine whether MMTV-like env gene sequences are present in breast cancer samples of Mexican women and in breast and lung cancer cell lines. METHODS Using specific primers for MMTV, we tested 3 breast cancer cell lines, 4 non-small lung cancer cell lines and 119 breast cancer samples from Mexican women. RESULTS MMTV-like gene sequences were amplified in the lung cancer cell INER-51, but not in the MCF-7 cell line that has been used as a positive control in other reports and in 5 of 119 (4.2%) breast cancer biopsy tissues. Furthermore, the identity of sequences of PCR products from INER-51 and a breast cancer-positive sample are 98 and 99% when compared with the env region of MMTV (GenBank accession No. AY161347). CONCLUSION These results indicate that MMTV-like gene sequences are present in the Mexican population.
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Affiliation(s)
- P Zapata-Benavides
- Departamento de Microbiología e Inmunología, Facultad de Ciencias Biológicas, Universidad Autónoma de Nuevo León (UANL), Ciudad Universitaria, San Nicolás de los Garza, NL, México
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