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Timóteo M, Tavares A, Cruz S, Campos C, Medeiros R, Sousa H. Association of Murine Double Minute 2 polymorphisms with gastric cancer: A systematic review with meta-analysis. Biomed Rep 2021; 15:69. [PMID: 34257965 DOI: 10.3892/br.2021.1445] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Accepted: 04/20/2021] [Indexed: 01/09/2023] Open
Abstract
Gastric cancer (GC) is the 5th most common type of cancer, with the 3rd highest mortality rate worldwide in both sexes. Murine double minute 2 (MDM2) protein is the major negative regulator of p53, and genetic polymorphisms in this gene have shown to be associated with several types of cancer. In the present study, a literature search was performed using PubMed and Scopus with the following key word combinations 'gastric cancer AND polymorphism AND MDM2'. Studies were carefully revised according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines to identify eligible studies that matched the inclusion criteria. Statistical analysis was performed to assess the association between the different genetic polymorphisms and GC risk, by calculating the odds ratios (OR) and the confidence intervals (CI), with a 5% level of significance. A total of 11 manuscripts studied MDM2 polymorphisms in GC: rs937283 (n=1), rs3730485 (n=1) and rs2279744 (n=9). Both the rs937283 and rs3730485 reports showed an association with GC; however, there was only one study on each of these polymorphisms in the literature. A meta-analysis was performed for the rs2279744 polymorphism, of which studies showed a positive association between the G allele and risk of GC, either in the dominant model (OR=1.46; 95% CI 1.21-1.75; P<0.001) or recessive model (OR 1.65; 95% CI 1.45-1.87; P<0.001). In conclusion, genetic polymorphisms in MDM2 seemed to be associated with an increased risk of GC development, nevertheless, the number of studies were relatively low and the studied populations were primarily Chinese. The present meta-analysis emphasizes the need for additional studies in other populations to corroborate the association of these polymorphisms with GC.
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Affiliation(s)
- Mafalda Timóteo
- Molecular Oncology and Viral Pathology Group (CI-IPOP), Portuguese Oncology Institute of Porto, 4200-072 Porto, Portugal
| | - Ana Tavares
- Molecular Oncology and Viral Pathology Group (CI-IPOP), Portuguese Oncology Institute of Porto, 4200-072 Porto, Portugal.,Pathology Department, Portuguese Oncology Institute of Porto, 4200-072 Porto, Portugal
| | - Sara Cruz
- Molecular Oncology and Viral Pathology Group (CI-IPOP), Portuguese Oncology Institute of Porto, 4200-072 Porto, Portugal
| | - Carla Campos
- Molecular Oncology and Viral Pathology Group (CI-IPOP), Portuguese Oncology Institute of Porto, 4200-072 Porto, Portugal.,Microbiology Service, Portuguese Oncology Institute of Porto, 4200-072 Porto, Portugal
| | - Rui Medeiros
- Molecular Oncology and Viral Pathology Group (CI-IPOP), Portuguese Oncology Institute of Porto, 4200-072 Porto, Portugal.,Virology Service, Portuguese Oncology Institute of Porto, 4200-072 Porto, Portugal.,Research Department, Portuguese League Against Cancer (Liga Portuguesa Contra o Cancro-Núcleo Regional do Norte), 4200-172 Porto, Portugal
| | - Hugo Sousa
- Molecular Oncology and Viral Pathology Group (CI-IPOP), Portuguese Oncology Institute of Porto, 4200-072 Porto, Portugal.,Virology Service, Portuguese Oncology Institute of Porto, 4200-072 Porto, Portugal
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Roumani F, Azinheiro S, Sousa H, Sousa A, Timóteo M, Varandas T, Fonseca-Silva D, Baldaque I, Carvalho J, Prado M, Garrido-Maestu A. Optimization and Clinical Evaluation of a Multi-Target Loop-Mediated Isothermal Amplification Assay for the Detection of SARS-CoV-2 in Nasopharyngeal Samples. Viruses 2021; 13:940. [PMID: 34069710 PMCID: PMC8161362 DOI: 10.3390/v13050940] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Revised: 05/13/2021] [Accepted: 05/16/2021] [Indexed: 12/23/2022] Open
Abstract
SARS-CoV-2 is the coronavirus responsible for COVID-19, which has spread worldwide, affecting more than 200 countries, infecting over 140 million people in one year. The gold standard to identify infected people is RT-qPCR, which is highly sensitive, but needs specialized equipment and trained personnel. The demand for these reagents has caused shortages in certain countries. Isothermal nucleic acid techniques, such as loop-mediated isothermal amplification (LAMP) have emerged as an alternative or as a complement to RT-qPCR. In this study, we developed and evaluated a multi-target RT-LAMP for the detection of SARS-CoV-2. The method was evaluated against an RT-qPCR in 152 clinical nasopharyngeal swab samples. The results obtained indicated that both assays presented a "good concordance" (Cohen's k of 0.69), the RT-LAMP was highly specific (99%) but had lower sensitivity compared to the gold standard (63.3%). The calculated low sensitivity was associated with samples with very low viral load (RT-qPCR Cq values higher than 35) which may be associated with non-infectious individuals. If an internal Cq threshold below 35 was set, the sensitivity and Cohen's k increased to 90.9% and 0.92, respectively. The interpretation of the Cohen's k for this was "very good concordance". The RT-LAMP is an attractive approach for frequent individual testing in decentralized setups.
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Affiliation(s)
- Foteini Roumani
- Food Quality and Safety Research Group, International Iberian Nanotechnology Laboratory, Av. Mestre José Veiga s/n, 4715-330 Braga, Portugal; (F.R.); (S.A.); (J.C.); (M.P.)
- Department of Analytical Chemistry, Nutrition and Food Science, School of Veterinary Sciences, University of Santiago de Compostela, Campus of Lugo, 27002 Lugo, Spain
| | - Sarah Azinheiro
- Food Quality and Safety Research Group, International Iberian Nanotechnology Laboratory, Av. Mestre José Veiga s/n, 4715-330 Braga, Portugal; (F.R.); (S.A.); (J.C.); (M.P.)
- Department of Analytical Chemistry, Nutrition and Food Science, School of Veterinary Sciences, University of Santiago de Compostela, Campus of Lugo, 27002 Lugo, Spain
| | - Hugo Sousa
- Virology Service, Portuguese Oncology Institute of Porto, Rua Dr. António Bernardino de Almeida, 4200-072 Porto, Portugal; (H.S.); (A.S.); (T.V.); (D.F.-S.); (I.B.)
- Molecular Oncology and Viral Pathology Group (CI-IPOP), Portuguese Oncology Institute of Porto, Rua Dr. António Bernardino de Almeida, 4200-072 Porto, Portugal;
| | - Ana Sousa
- Virology Service, Portuguese Oncology Institute of Porto, Rua Dr. António Bernardino de Almeida, 4200-072 Porto, Portugal; (H.S.); (A.S.); (T.V.); (D.F.-S.); (I.B.)
- Molecular Oncology and Viral Pathology Group (CI-IPOP), Portuguese Oncology Institute of Porto, Rua Dr. António Bernardino de Almeida, 4200-072 Porto, Portugal;
| | - Mafalda Timóteo
- Molecular Oncology and Viral Pathology Group (CI-IPOP), Portuguese Oncology Institute of Porto, Rua Dr. António Bernardino de Almeida, 4200-072 Porto, Portugal;
| | - Tatiana Varandas
- Virology Service, Portuguese Oncology Institute of Porto, Rua Dr. António Bernardino de Almeida, 4200-072 Porto, Portugal; (H.S.); (A.S.); (T.V.); (D.F.-S.); (I.B.)
- Molecular Oncology and Viral Pathology Group (CI-IPOP), Portuguese Oncology Institute of Porto, Rua Dr. António Bernardino de Almeida, 4200-072 Porto, Portugal;
| | - Daniela Fonseca-Silva
- Virology Service, Portuguese Oncology Institute of Porto, Rua Dr. António Bernardino de Almeida, 4200-072 Porto, Portugal; (H.S.); (A.S.); (T.V.); (D.F.-S.); (I.B.)
| | - Inês Baldaque
- Virology Service, Portuguese Oncology Institute of Porto, Rua Dr. António Bernardino de Almeida, 4200-072 Porto, Portugal; (H.S.); (A.S.); (T.V.); (D.F.-S.); (I.B.)
| | - Joana Carvalho
- Food Quality and Safety Research Group, International Iberian Nanotechnology Laboratory, Av. Mestre José Veiga s/n, 4715-330 Braga, Portugal; (F.R.); (S.A.); (J.C.); (M.P.)
- Department of Analytical Chemistry, Nutrition and Food Science, School of Veterinary Sciences, University of Santiago de Compostela, Campus of Lugo, 27002 Lugo, Spain
| | - Marta Prado
- Food Quality and Safety Research Group, International Iberian Nanotechnology Laboratory, Av. Mestre José Veiga s/n, 4715-330 Braga, Portugal; (F.R.); (S.A.); (J.C.); (M.P.)
| | - Alejandro Garrido-Maestu
- Food Quality and Safety Research Group, International Iberian Nanotechnology Laboratory, Av. Mestre José Veiga s/n, 4715-330 Braga, Portugal; (F.R.); (S.A.); (J.C.); (M.P.)
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Cruz S, Campos C, Timóteo M, Tavares A, José Nascimento MS, Medeiros R, Sousa H. Hepatitis E virus in hematopoietic stem cell transplant recipients: A systematic review. J Clin Virol 2019; 119:31-36. [DOI: 10.1016/j.jcv.2019.08.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Revised: 07/30/2019] [Accepted: 08/01/2019] [Indexed: 12/28/2022]
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