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Cicirò Y, Ragusa D, Sala A. Expression of the checkpoint kinase BUB1 is a predictor of response to cancer therapies. Sci Rep 2024; 14:4461. [PMID: 38396175 PMCID: PMC10891059 DOI: 10.1038/s41598-024-55080-y] [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: 10/04/2023] [Accepted: 02/19/2024] [Indexed: 02/25/2024] Open
Abstract
The identification of clinically-relevant biomarkers is of upmost importance for the management of cancer, from diagnosis to treatment choices. We performed a pan-cancer analysis of the mitotic checkpoint budding uninhibited by benzimidazole 1 gene BUB1, in the attempt to ascertain its diagnostic and prognostic values, specifically in the context of drug response. BUB1 was found to be overexpressed in the majority of cancers, and particularly elevated in clinically aggressive molecular subtypes. Its expression was correlated with clinico-phenotypic features, notably tumour staging, size, invasion, hypoxia, and stemness. In terms of prognostic value, the expression of BUB1 bore differential clinical outcomes depending on the treatment administered in TCGA cancer cohorts, suggesting sensitivity or resistance, depending on the expression levels. We also integrated in vitro drug sensitivity data from public projects based on correlation between drug efficacy and BUB1 expression to produce a list of candidate compounds with differential responses according to BUB1 levels. Gene Ontology enrichment analyses revealed that BUB1 overexpression in cancer is associated with biological processes related to mitosis and chromosome segregation machinery, reflecting the mechanisms of action of drugs with a differential effect based on BUB1 expression.
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Affiliation(s)
- Ylenia Cicirò
- Centre for Inflammation Research and Translational Medicine (CIRTM), Brunel University London, Uxbridge, UB8 3PH, UK
| | - Denise Ragusa
- Centre for Genome Engineering and Maintenance (CenGEM), Brunel University London, Uxbridge, UB8 3PH, UK.
| | - Arturo Sala
- Centre for Inflammation Research and Translational Medicine (CIRTM), Brunel University London, Uxbridge, UB8 3PH, UK.
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2
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Borges DDP, Dos Santos AWA, Paier CRK, Ribeiro HL, Costa MB, Farias IR, de Oliveira RTG, França IGDF, Cavalcante GM, Magalhães SMM, Pinheiro RF. Prognostic importance of Aurora Kinases and mitotic spindle genes transcript levels in Myelodysplastic syndrome. Leuk Res 2017; 64:61-70. [PMID: 29220700 DOI: 10.1016/j.leukres.2017.11.013] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2017] [Revised: 11/22/2017] [Accepted: 11/27/2017] [Indexed: 12/25/2022]
Abstract
Myelodysplastic syndrome (MDS) are a heterogeneous group of clonal disease characterized by insufficiency of bone marrow, increase of apoptosis and increased risk of acute leukemia progression. Proteins related to the mitotic spindle (AURKA, AURKB, TPX2), to the mitotic checkpoint (MAD2, CDC20) and the regulation of the cell cycle (p21) are directly related to chromosomal stability and tumor development. This study aimed to evaluate the mRNA expression levels of these genes in 101 MDS patients using a real-time PCR methodology. We identified that CDC20 expression are increased in patients with dysmegakaryopoiesis (p=0.024), thrombocytopenia (p=0.000) and high-risk patients (p=0.014, 0.018) MAD2 expression are decreased in patients with 2 or 3 cytopenias (p=0.000) and neutrophil below 800/mm3. TPX2 is also overexpressed in patients presenting dysmegakaryopoiesis (p=0.009). A decrease in AURKA and AURKB expression were observed in patients with altered karyotype (p=0.000), who presented dysplasia in 3 lineages (p=0.000; 0.017) and hemoglobin inferior to 8g/dL (p=0.024). The expression of AURKA, AURKB and MAD2 (p=0.000; 0.001; 0.025) were decreased in patients with hypoplastic MDS, associated with high frequency of chromosomal alterations and high mortality rate. This study reaffirms the importance of aurora kinases and mitotic spindle genes to the pathogenesis and clinical evolution of MDS.
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Affiliation(s)
- Daniela de Paula Borges
- Cancer Cytogenomic Laboratory, Federal University of Ceara, Fortaleza, Ceara, Brazil; Post-Graduate Program in Medical Science, Federal University of Ceara, Fortaleza, Ceara, Brazil; Center for Research and Drug Development (NPDM), Federal University of Ceara, Fortaleza, Ceara, Brazil
| | - Antônio Wesley Araújo Dos Santos
- Cancer Cytogenomic Laboratory, Federal University of Ceara, Fortaleza, Ceara, Brazil; Center for Research and Drug Development (NPDM), Federal University of Ceara, Fortaleza, Ceara, Brazil
| | | | - Howard Lopes Ribeiro
- Cancer Cytogenomic Laboratory, Federal University of Ceara, Fortaleza, Ceara, Brazil; Post-Graduate Program in Medical Science, Federal University of Ceara, Fortaleza, Ceara, Brazil; Center for Research and Drug Development (NPDM), Federal University of Ceara, Fortaleza, Ceara, Brazil
| | - Marília Braga Costa
- Cancer Cytogenomic Laboratory, Federal University of Ceara, Fortaleza, Ceara, Brazil; Post-Graduate Program in Medical Science, Federal University of Ceara, Fortaleza, Ceara, Brazil; Center for Research and Drug Development (NPDM), Federal University of Ceara, Fortaleza, Ceara, Brazil
| | - Izabelle Rocha Farias
- Cancer Cytogenomic Laboratory, Federal University of Ceara, Fortaleza, Ceara, Brazil; Post-Graduate Program in Medical Science, Federal University of Ceara, Fortaleza, Ceara, Brazil; Center for Research and Drug Development (NPDM), Federal University of Ceara, Fortaleza, Ceara, Brazil
| | - Roberta Taiane Germano de Oliveira
- Cancer Cytogenomic Laboratory, Federal University of Ceara, Fortaleza, Ceara, Brazil; Post-Graduate Program in Medical Science, Federal University of Ceara, Fortaleza, Ceara, Brazil; Center for Research and Drug Development (NPDM), Federal University of Ceara, Fortaleza, Ceara, Brazil
| | - Ivo Gabriel da Frota França
- Cancer Cytogenomic Laboratory, Federal University of Ceara, Fortaleza, Ceara, Brazil; Center for Research and Drug Development (NPDM), Federal University of Ceara, Fortaleza, Ceara, Brazil
| | - Gabrielle Melo Cavalcante
- Cancer Cytogenomic Laboratory, Federal University of Ceara, Fortaleza, Ceara, Brazil; Center for Research and Drug Development (NPDM), Federal University of Ceara, Fortaleza, Ceara, Brazil
| | - Sílvia Maria Meira Magalhães
- Cancer Cytogenomic Laboratory, Federal University of Ceara, Fortaleza, Ceara, Brazil; Post-Graduate Program in Medical Science, Federal University of Ceara, Fortaleza, Ceara, Brazil; Center for Research and Drug Development (NPDM), Federal University of Ceara, Fortaleza, Ceara, Brazil
| | - Ronald Feitosa Pinheiro
- Cancer Cytogenomic Laboratory, Federal University of Ceara, Fortaleza, Ceara, Brazil; Post-Graduate Program in Medical Science, Federal University of Ceara, Fortaleza, Ceara, Brazil; Center for Research and Drug Development (NPDM), Federal University of Ceara, Fortaleza, Ceara, Brazil; Post-Graduate Program of Pathology, Federal University of Ceara, Fortaleza, Ceara, Brazil.
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3
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Cierna Z, Mego M, Jurisica I, Machalekova K, Chovanec M, Miskovska V, Svetlovska D, Kalavska K, Rejlekova K, Kajo K, Mardiak J, Babal P. Fibrillin-1 (FBN-1) a new marker of germ cell neoplasia in situ. BMC Cancer 2016; 16:597. [PMID: 27487789 PMCID: PMC4973050 DOI: 10.1186/s12885-016-2644-z] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2016] [Accepted: 07/28/2016] [Indexed: 01/09/2023] Open
Abstract
Background Germ cell neoplasia in situ (GCNIS), is preinvasive stage of testicular germ cell tumours (TGCTs). Fibrillins, which are integral components of microfibrils are suggested to be involved in cancer pathogenesis and maintenance of embryonic stem cells pluripotency. The aim of this study was to examine fibrillin-1 (FBN-1) expression in TGCTs patients. Methods Surgical specimens from 203 patients with TGCTs were included into the translational study. FBN-1 expression was evaluated in the tumour tissue, in GCNIS and in adjacent non-neoplastic testicular tissue in all available cases. Tissue samples were processed by the tissue microarray method. FBN-1 was detected by immunohistochemistry using goat polyclonal antibody and the expression was evaluated by the multiplicative quickscore (QS). Results The highest FBN-1 positivity was detected in GCNIS (mean QS = 11.30), with overexpression of FBN-1 (QS >9) in the majority (77.1 %) of cases. Expression of FBN-1 in all subtypes of TGCTs was significantly lower in comparison to expression in GCNIS (all p <0.001). Seminoma had significantly higher expression compared to EC, ChC and TER (all p <0.05), but not to YST (p = 0.84). In non-neoplastic testicular tissue the FBN-1 positivity was very low (mean QS = 0.02). Sensitivity, specificity, positive and negative predictive value of FBN-1 expression for diagnosis of GCNIS were 97.1, 98.8, 98.6 and 97.7 %. Conclusions FBN-1 is overexpressed in TGCTs and especially in GCNIS when compared to non-neoplastic testicular tissue in patients with germ cell tumors and could be involved in germ cell neoplasia in situ development.
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Affiliation(s)
- Z Cierna
- Department of Pathology, Faculty of Medicine, Comenius University, Bratislava, Slovakia
| | - M Mego
- 2nd Department of Oncology, Faculty of Medicine, Comenius University, Bratislava, Slovakia. .,Translational Research Unit, Faculty of Medicine, Comenius University, Bratislava, Slovakia. .,National Cancer Institute, Bratislava, Slovakia. .,2nd Department of Oncology, Faculty of Medicine, National Cancer Institute, Comenius University, Klenova 1, 833 10, Bratislava, Slovak Republic.
| | - I Jurisica
- Princess Margaret Cancer Centre, University Health Network and University of Toronto, Toronto, Canada
| | - K Machalekova
- St. Elisabeth Cancer Institute, Bratislava, Slovakia
| | - M Chovanec
- 2nd Department of Oncology, Faculty of Medicine, Comenius University, Bratislava, Slovakia.,National Cancer Institute, Bratislava, Slovakia
| | - V Miskovska
- St. Elisabeth Cancer Institute, Bratislava, Slovakia.,1st Department of Oncology, Faculty of Medicine, Comenius University, Bratislava, Slovakia
| | - D Svetlovska
- Translational Research Unit, Faculty of Medicine, Comenius University, Bratislava, Slovakia.,National Cancer Institute, Bratislava, Slovakia
| | - K Kalavska
- Translational Research Unit, Faculty of Medicine, Comenius University, Bratislava, Slovakia.,National Cancer Institute, Bratislava, Slovakia
| | - K Rejlekova
- 2nd Department of Oncology, Faculty of Medicine, Comenius University, Bratislava, Slovakia.,National Cancer Institute, Bratislava, Slovakia
| | - K Kajo
- St. Elisabeth Cancer Institute, Bratislava, Slovakia
| | - J Mardiak
- 2nd Department of Oncology, Faculty of Medicine, Comenius University, Bratislava, Slovakia.,National Cancer Institute, Bratislava, Slovakia
| | - P Babal
- Department of Pathology, Faculty of Medicine, Comenius University, Bratislava, Slovakia
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López-Saavedra A, Ramírez-Otero M, Díaz-Chávez J, Cáceres-Gutiérrez R, Justo-Garrido M, Andonegui MA, Mendoza J, Downie-Ruíz Á, Cortés-González C, Reynoso N, Castro-Hernández C, Domínguez-Gómez G, Santibáñez M, Fabián-Morales E, Pruefer F, Luna-Maldonado F, González-Barrios R, Herrera LA. MAD2γ, a novel MAD2 isoform, reduces mitotic arrest and is associated with resistance in testicular germ cell tumors. Cell Cycle 2016; 15:2066-76. [PMID: 27315568 PMCID: PMC4968973 DOI: 10.1080/15384101.2016.1198863] [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] [Indexed: 11/28/2022] Open
Abstract
Background: Prolonged mitotic arrest in response to anti-cancer chemotherapeutics, such as DNA-damaging agents, induces apoptosis, mitotic catastrophe, and senescence. Disruptions in mitotic checkpoints contribute resistance to DNA-damaging agents in cancer. MAD2 has been associated with checkpoint failure and chemotherapy response. In this study, a novel splice variant of MAD2, designated MAD2γ, was identified, and its association with the DNA damage response was investigated. Methods: Endogenous expression of MAD2γ and full-length MAD2 (MAD2α) was measured using RT-PCR in cancer cell lines, normal foreskin fibroblasts, and tumor samples collected from patients with testicular germ cell tumors (TGCTs). A plasmid expressing MAD2γ was transfected into HCT116 cells, and its intracellular localization and checkpoint function were evaluated according to immunofluorescence and mitotic index. Results: MAD2γ was expressed in several cancer cell lines and non-cancerous fibroblasts. Ectopically expressed MAD2γ localized to the nucleus and reduced the mitotic index, suggesting checkpoint impairment. In patients with TGCTs, the overexpression of endogenous MAD2γ, but not MAD2α, was associated with resistance to cisplatin-based chemotherapy. Likewise, cisplatin induced the overexpression of endogenous MAD2γ, but not MAD2α, in HCT116 cells. Conclusions: Overexpression of MAD2γ may play a role in checkpoint disruption and is associated with resistance to cisplatin-based chemotherapy in TGCTs.
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Affiliation(s)
- Alejandro López-Saavedra
- a Unidad de Investigación Biomédica en Cáncer , Instituto Nacional de Cancerología (INCan) - Instituto de Investigaciones Biomédicas - Universidad Nacional Autónoma de México (UNAM) , Del. Tlalpan , Mexico D.F
| | - Miguel Ramírez-Otero
- a Unidad de Investigación Biomédica en Cáncer , Instituto Nacional de Cancerología (INCan) - Instituto de Investigaciones Biomédicas - Universidad Nacional Autónoma de México (UNAM) , Del. Tlalpan , Mexico D.F
| | - José Díaz-Chávez
- a Unidad de Investigación Biomédica en Cáncer , Instituto Nacional de Cancerología (INCan) - Instituto de Investigaciones Biomédicas - Universidad Nacional Autónoma de México (UNAM) , Del. Tlalpan , Mexico D.F
| | - Rodrigo Cáceres-Gutiérrez
- a Unidad de Investigación Biomédica en Cáncer , Instituto Nacional de Cancerología (INCan) - Instituto de Investigaciones Biomédicas - Universidad Nacional Autónoma de México (UNAM) , Del. Tlalpan , Mexico D.F
| | - Monserrat Justo-Garrido
- a Unidad de Investigación Biomédica en Cáncer , Instituto Nacional de Cancerología (INCan) - Instituto de Investigaciones Biomédicas - Universidad Nacional Autónoma de México (UNAM) , Del. Tlalpan , Mexico D.F
| | - Marco A Andonegui
- a Unidad de Investigación Biomédica en Cáncer , Instituto Nacional de Cancerología (INCan) - Instituto de Investigaciones Biomédicas - Universidad Nacional Autónoma de México (UNAM) , Del. Tlalpan , Mexico D.F
| | - Julia Mendoza
- a Unidad de Investigación Biomédica en Cáncer , Instituto Nacional de Cancerología (INCan) - Instituto de Investigaciones Biomédicas - Universidad Nacional Autónoma de México (UNAM) , Del. Tlalpan , Mexico D.F
| | - Ángela Downie-Ruíz
- a Unidad de Investigación Biomédica en Cáncer , Instituto Nacional de Cancerología (INCan) - Instituto de Investigaciones Biomédicas - Universidad Nacional Autónoma de México (UNAM) , Del. Tlalpan , Mexico D.F
| | - Carlo Cortés-González
- a Unidad de Investigación Biomédica en Cáncer , Instituto Nacional de Cancerología (INCan) - Instituto de Investigaciones Biomédicas - Universidad Nacional Autónoma de México (UNAM) , Del. Tlalpan , Mexico D.F
| | - Nancy Reynoso
- a Unidad de Investigación Biomédica en Cáncer , Instituto Nacional de Cancerología (INCan) - Instituto de Investigaciones Biomédicas - Universidad Nacional Autónoma de México (UNAM) , Del. Tlalpan , Mexico D.F
| | - Clementina Castro-Hernández
- a Unidad de Investigación Biomédica en Cáncer , Instituto Nacional de Cancerología (INCan) - Instituto de Investigaciones Biomédicas - Universidad Nacional Autónoma de México (UNAM) , Del. Tlalpan , Mexico D.F
| | - Guadalupe Domínguez-Gómez
- a Unidad de Investigación Biomédica en Cáncer , Instituto Nacional de Cancerología (INCan) - Instituto de Investigaciones Biomédicas - Universidad Nacional Autónoma de México (UNAM) , Del. Tlalpan , Mexico D.F
| | - Miguel Santibáñez
- a Unidad de Investigación Biomédica en Cáncer , Instituto Nacional de Cancerología (INCan) - Instituto de Investigaciones Biomédicas - Universidad Nacional Autónoma de México (UNAM) , Del. Tlalpan , Mexico D.F
| | - Eunice Fabián-Morales
- a Unidad de Investigación Biomédica en Cáncer , Instituto Nacional de Cancerología (INCan) - Instituto de Investigaciones Biomédicas - Universidad Nacional Autónoma de México (UNAM) , Del. Tlalpan , Mexico D.F
| | - Franz Pruefer
- a Unidad de Investigación Biomédica en Cáncer , Instituto Nacional de Cancerología (INCan) - Instituto de Investigaciones Biomédicas - Universidad Nacional Autónoma de México (UNAM) , Del. Tlalpan , Mexico D.F
| | - Fernando Luna-Maldonado
- a Unidad de Investigación Biomédica en Cáncer , Instituto Nacional de Cancerología (INCan) - Instituto de Investigaciones Biomédicas - Universidad Nacional Autónoma de México (UNAM) , Del. Tlalpan , Mexico D.F
| | - Rodrigo González-Barrios
- a Unidad de Investigación Biomédica en Cáncer , Instituto Nacional de Cancerología (INCan) - Instituto de Investigaciones Biomédicas - Universidad Nacional Autónoma de México (UNAM) , Del. Tlalpan , Mexico D.F
| | - Luis A Herrera
- a Unidad de Investigación Biomédica en Cáncer , Instituto Nacional de Cancerología (INCan) - Instituto de Investigaciones Biomédicas - Universidad Nacional Autónoma de México (UNAM) , Del. Tlalpan , Mexico D.F
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5
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Hehnly H, Canton D, Bucko P, Langeberg LK, Ogier L, Gelman I, Santana LF, Wordeman L, Scott JD. A mitotic kinase scaffold depleted in testicular seminomas impacts spindle orientation in germ line stem cells. eLife 2015; 4:e09384. [PMID: 26406118 PMCID: PMC4612572 DOI: 10.7554/elife.09384] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Accepted: 09/20/2015] [Indexed: 12/19/2022] Open
Abstract
Correct orientation of the mitotic spindle in stem cells underlies organogenesis. Spindle abnormalities correlate with cancer progression in germ line-derived tumors. We discover a macromolecular complex between the scaffolding protein Gravin/AKAP12 and the mitotic kinases, Aurora A and Plk1, that is down regulated in human seminoma. Depletion of Gravin correlates with an increased mitotic index and disorganization of seminiferous tubules. Biochemical, super-resolution imaging, and enzymology approaches establish that this Gravin scaffold accumulates at the mother spindle pole during metaphase. Manipulating elements of the Gravin-Aurora A-Plk1 axis prompts mitotic delay and prevents appropriate assembly of astral microtubules to promote spindle misorientation. These pathological responses are conserved in seminiferous tubules from Gravin(-/-) mice where an overabundance of Oct3/4 positive germ line stem cells displays randomized orientation of mitotic spindles. Thus, we propose that Gravin-mediated recruitment of Aurora A and Plk1 to the mother (oldest) spindle pole contributes to the fidelity of symmetric cell division.
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Affiliation(s)
- Heidi Hehnly
- Department of Pharmacology, Howard Hughes Medical Institute, University of Washington, Seattle, United States
- Department of Cell and Developmental Biology, State University of New York Upstate Medical University, Syracuse, United States
| | - David Canton
- Department of Pharmacology, Howard Hughes Medical Institute, University of Washington, Seattle, United States
| | - Paula Bucko
- Department of Pharmacology, Howard Hughes Medical Institute, University of Washington, Seattle, United States
| | - Lorene K Langeberg
- Department of Pharmacology, Howard Hughes Medical Institute, University of Washington, Seattle, United States
| | - Leah Ogier
- Department of Pharmacology, Howard Hughes Medical Institute, University of Washington, Seattle, United States
| | - Irwin Gelman
- Department of Cancer Genetics, Roswell Park Cancer Institute, Buffalo, United States
| | - L Fernando Santana
- Department of Physiology and Biophysics, University of Washington, Seattle, United States
| | - Linda Wordeman
- Department of Physiology and Biophysics, University of Washington, Seattle, United States
| | - John D Scott
- Department of Pharmacology, Howard Hughes Medical Institute, University of Washington, Seattle, United States
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6
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Mohiuddin MK, Chava S, Upendrum P, Latha M, Zubeda S, Kumar A, Ahuja YR, Hasan Q, Mohan V. Role of Human papilloma virus infection and altered methylation of specific genes in esophageal cancer. Asian Pac J Cancer Prev 2014; 14:4187-93. [PMID: 23991974 DOI: 10.7314/apjcp.2013.14.7.4187] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Evaluation of Human papilloma virus (HPV) and its association with promoter methylation of candidate genes, p53 and Aurora A in esophageal cancer. MATERIALS AND METHODS One hundred forty-one esophageal tissue samples from different pathologies were evaluated for HPV infection by PCR, while the promoter methylation status of p53 and Aurora A was assessed by methylation-specific restriction based PCR assay. Statistical analyses were performed with MedCalc and MDR software. RESULTS Based on endoscopy and histopathology, samples were categorized: cancers (n=56), precancers (n=7), esophagitis (n=19) and normals (n=59). HPV infection was found to be less common in cancers (19.6%), whereas its prevalence was relatively high in precancers (71.4%), esophagitis (57.8%) and normals (45.7%). p53 promoter methylation did not show any significant difference between cancer and normal tissues, whereas Aurora A promoter methylation demonstrated significant association with disease (p=0.00016, OR:5.6452, 95%CI:2.18 to 14.6) when compared to normals. Aurora A methylation and HPV infection was found in a higher percentages of precancer (66.6%), esophagitis (54.5%) and normal (45.2%) when compared to cancers (14.2%). CONCLUSIONS Aurora A promoter methylation is significantly associated with esophageal cancer, but the effect of HPV infection on this epigenetic alteration is not significant. However MDR analysis showed that the hypostatic effect of HPV was nullified when the cases had Aurora methylation and tobacco exposure. Further HPV sub-typing may give an insight into its reduced prevalence in esophageal cancer verses normal tissue. However, with the present data it is difficult to assign any significant role to HPV in the etiopathology of esophageal cancer.
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Affiliation(s)
- Mohammed Khaliq Mohiuddin
- Department of Genetics, Vasavi Medical and Research Centre, Kamineni Hospitals, LB Nagar, Andhra Pradesh, India.
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7
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Bhattacharya A, Gupta A. Evaluation of Acinetobacter sp. B9 for Cr (VI) resistance and detoxification with potential application in bioremediation of heavy-metals-rich industrial wastewater. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2013; 20:6628-6637. [PMID: 23619927 DOI: 10.1007/s11356-013-1728-4] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2013] [Accepted: 04/08/2013] [Indexed: 06/02/2023]
Abstract
Present work demonstrates Cr (VI) detoxification and resistance mechanism of a newly isolated strain (B9) of Acinetobacter sp. Bioremediation potential of the strain B9 is shown by simultaneous removal of major heavy metals including chromium from heavy-metals-rich metal finishing industrial wastewater. Strain B9 tolerate up to 350 mg L(-1) of Cr (VI) and also shows level of tolerance to Ni (II), Zn (II), Pb (II), and Cd (II). The strain was capable of reducing 67 % of initial 7.0 mg L(-1) of Cr (VI) within 24 h of incubation, while in presence of Cu ions 100 % removal of initial 7.0 and 10 mg L(-1) of Cr (VI) was observed with in 24 h. pH in the range of 6.0-8.0 and inoculum size of 2 % (v/v) were determined to be optimum for dichromate reduction. Fourier transform infrared spectroscopy and transmission electron microscopy studies suggested absorption or intracellular accumulation and that might be one of the major mechanisms behind the chromium resistance by strain B9. Scanning electron microscopy showed morphological changes in the strain due to chromium stress. Relevance of the strain for treatment of heavy-metals-rich industrial wastewater resulted in 93.7, 55.4, and 68.94 % removal of initial 30 mg L(-1) Cr (VI), 246 mg L(-1) total Cr, and 51 mg L(-1) Ni, respectively, after 144 h of treatment in a batch mode.
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Affiliation(s)
- Amrik Bhattacharya
- University School of Environment Management, Guru Gobind Singh Indraprastha University, Sector 16-C, Dwarka, New Delhi, 110078, India
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Schuyler SC, Wu YF, Kuan VJW. The Mad1-Mad2 balancing act--a damaged spindle checkpoint in chromosome instability and cancer. J Cell Sci 2012; 125:4197-206. [PMID: 23093575 DOI: 10.1242/jcs.107037] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Cancer cells are commonly aneuploid. The spindle checkpoint ensures accurate chromosome segregation by controlling cell cycle progression in response to aberrant microtubule-kinetochore attachment. Damage to the checkpoint, which is a partial loss or gain of checkpoint function, leads to aneuploidy during tumorigenesis. One form of damage is a change in levels of the checkpoint proteins mitotic arrest deficient 1 and 2 (Mad1 and Mad2), or in the Mad1:Mad2 ratio. Changes in Mad1 and Mad2 levels occur in human cancers, where their expression is regulated by the tumor suppressors p53 and retinoblastoma 1 (RB1). By employing a standard assay, namely the addition of a mitotic poison at mitotic entry, it has been shown that checkpoint function is normal in many cancer cells. However, in several experimental systems, it has been observed that this standard assay does not always reveal checkpoint aberrations induced by changes in Mad1 or Mad2, where excess Mad1 relative to Mad2 can lead to premature anaphase entry, and excess Mad2 can lead to a delay in entering anaphase. This Commentary highlights how changes in the levels of Mad1 and Mad2 result in a damaged spindle checkpoint, and explores how these changes cause chromosome instability that can lead to aneuploidy during tumorigenesis.
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Affiliation(s)
- Scott C Schuyler
- Department of Biomedical Sciences, College of Medicine, Chang Gung University, Kwei-Shan, Tao-Yuan, 333 Taiwan, Republic of China.
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9
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Signal transducer and activator of transcription 3 (STAT3): a promising target for anticancer therapy. Future Med Chem 2011; 3:567-97. [PMID: 21526897 DOI: 10.4155/fmc.11.22] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Signal transducer and activator of transcription 3 (STAT3) is an oncogenic protein whose inhibition is sought for the prevention and treatment of cancer. In this review, the validated therapeutic strategy to block aberrant activity of STAT3 in many tumor cell lines is evaluated by presenting the most promising inhibitors to date. The compounds are discussed in classes based on their different mechanisms of action, which are critically explained. In addition, their future clinical development as anticancer agents is considered. Furthermore, the efforts devoted to the comprehension of the structure-activity relationships and to the identification of the biological effects are brought to attention. The synthetic and technological approaches recently developed to overcome the difficulties in the obtainment of clinically suitable drugs are also presented.
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