Is it time for one-step nucleic acid amplification (OSNA) in colorectal cancer? A systematic review and meta-analysis

2017 ◽  
Vol 21 (9) ◽  
pp. 693-699 ◽  
Author(s):  
J. B. Wild ◽  
N. Iqbal ◽  
J. Francombe ◽  
T. Papettas ◽  
D. S. Sanders ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Systematic Review ◽  
Nucleic Acid ◽  
Meta Analysis ◽  
Nucleic Acid Amplification ◽  
One Step

scholarly journals A Systematic Review and Meta-analysis of the Diagnostic Accuracy of Nucleic Acid Amplification Tests for Tuberculous Meningitis

2019 ◽  
Vol 57 (6) ◽  
Author(s):  
Ali Pormohammad ◽  
Mohammad Javad Nasiri ◽  
Timothy D. McHugh ◽  
Seyed Mohammad Riahi ◽  
Nathan C. Bahr
Keyword(s):  
Systematic Review ◽  
Nucleic Acid ◽  
Diagnostic Accuracy ◽  
Likelihood Ratio ◽  
Tuberculous Meningitis ◽  
Meta Analysis ◽  
Nucleic Acid Amplification ◽  
Data Sets ◽  
Reference Standard ◽  
Sensitivity Specificity

ABSTRACTThe diagnosis of tuberculous meningitis (TBM) is difficult and poses a significant challenge to physicians worldwide. Recently, nucleic acid amplification (NAA) tests have shown promise for the diagnosis of TBM, although their performance has been variable. We undertook a systematic review and meta-analysis to evaluate the diagnostic accuracy of NAA tests with cerebrospinal fluid (CSF) samples against that of culture as the reference standard or a combined reference standard (CRS) for TBM. We searched the Embase, PubMed, Web of Science, and Cochrane Library databases for the relevant records. The QUADAS-2 tool was used to assess the quality of the studies. Diagnostic accuracy measures (i.e., sensitivity and specificity) were pooled with a random-effects model. All statistical analyses were performed with STATA (version 14 IC; Stata Corporation, College Station, TX, USA), Meta-DiSc (version 1.4 for Windows; Cochrane Colloquium, Barcelona, Spain), and RevMan (version 5.3; The Nordic Cochrane Centre, the Cochrane Collaboration, Copenhagen, Denmark) software. Sixty-three studies comprising 1,381 cases of confirmed TBM and 5,712 non-TBM controls were included in the final analysis. These 63 studies were divided into two groups comprising 71 data sets (43 in-house tests and 28 commercial tests) that used culture as the reference standard and 24 data sets (21 in-house tests and 3 commercial tests) that used a CRS. Studies which used a culture reference standard had better pooled summary estimates than studies which used CRS. The overall pooled estimates of sensitivity, specificity, positive likelihood ratio (PLR), and negative likelihood ratio (NLR) of the NAA tests against culture were 82% (95% confidence interval [CI], 75 to 87%), 99% (95% CI, 98 to 99%), 58.6 (95% CI, 35.3 to 97.3), and 0.19 (95% CI, 0.14 to 0.25), respectively. The pooled sensitivity, specificity, PLR, and NLR of NAA tests against CRS were 68% (95% CI, 41 to 87%), 98% (95% CI, 95 to 99%), 36.5 (95% CI, 15.6 to 85.3), and 0.32 (95% CI, 0.15 to 0.70), respectively. The analysis has demonstrated that the diagnostic accuracy of NAA tests is currently insufficient for them to replace culture as a lone diagnostic test. NAA tests may be used in combination with culture due to the advantage of time to result and in scenarios where culture tests are not feasible. Further work to improve NAA tests would benefit from the availability of standardized reference standards and improvements to the methodology.

scholarly journals Meta-analysis of diagnostic accuracy of nucleic acid amplification tests for abdominal tuberculosis: A protocol

PLoS ONE ◽  
2020 ◽  
Vol 15 (12) ◽  
pp. e0243765
Author(s):  
Yanqin Shen ◽  
Likui Fang ◽  
Bo Ye ◽  
Guocan Yu
Keyword(s):  
Systematic Review ◽  
Nucleic Acid ◽  
Diagnostic Accuracy ◽  
Meta Analysis ◽  
Extrapulmonary Tuberculosis ◽  
Abdominal Tuberculosis ◽  
Nucleic Acid Amplification ◽  
Cochrane Library ◽  
China National Knowledge Infrastructure ◽  
Nucleic Acid Amplification Tests

Background Abdominal tuberculosis is a severe extrapulmonary tuberculosis, which can lead to serious complications. Early diagnosis and treatment are very important for the prognosis and the diagnosis of abdominal tuberculosis is still difficult. This study aims to evaluate the diagnostic accuracy of nucleic acid amplification tests (NAATs) for abdominal tuberculosis using meta-analysis method. Methods We will search PubMed, the Cochrane Library, Embase, China National Knowledge Infrastructure, and the Wanfang database for studies evaluating the diagnostic accuracy of NAATs for abdominal tuberculosis until May 2020. We will include a systematic review and meta-analysis that evaluated the accuracy of NAATs for abdominal tuberculosis. Any types of study design with full text will be sought and included. The risk of bias will be assessed using the Quality Assessment of Diagnostic Accuracy Studies tool. Stata version 15.0 with the midas command packages will be used to carry out meta-analyses. Results The results will provide clinical evidence for diagnostic accuracy of NAATs for abdominal tuberculosis, and this systematic review and meta-analysis will be submitted to a peer-reviewed journal for publication. Conclusion This overview will provide evidence of NAATs for diagnosis of abdominal tuberculosis. Systematic review registration INPLASY202060030.

scholarly journals A systematic review and meta-analysis of the sensitivity of antibody tests for the laboratory confirmation of COVID-19

2021 ◽  
Author(s):  
Nigel A Makoah ◽  
Thomas Tipih ◽  
Matefo M Litabe ◽  
Mareza Brink ◽  
Joseph B Sempa ◽  
...  
Keyword(s):  
Systematic Review ◽  
Nucleic Acid ◽  
Symptom Onset ◽  
Meta Analysis ◽  
Nucleic Acid Amplification ◽  
Serological Tests ◽  
Nucleic Acid Amplification Tests ◽  
Laboratory Confirmation ◽  
Using Data ◽  
Low Sensitivity

Aim: The aim of this study was to investigate the utility of serological tests for the diagnosis of COVID-19 during the first week of symptom onset in patients confirmed with the real-time RT-PCR. Materials & methods: A systematic review and meta-analysis of 58 publications were performed using data obtained from Academic Search Ultimate, Africa-wide, Scopus, Web of Science and MEDLINE. Results: We found that the highest pooled sensitivities were obtained with ELISA IgM-IgG and chemiluminescence immunoassay IgM tests. Conclusion: Serological tests have low sensitivity within the first week of symptom onset and cannot replace nucleic acid amplification tests. However, serological assays can be used to support nucleic acid amplification tests.

scholarly journals Molecular Staging of Patients with Colon Cancer. The C-Closer-II Study: A Multicentre Study in Portugal

2018 ◽  
Vol 31 (11) ◽  
pp. 661 ◽  
Author(s):  
María José Brito ◽  
Mrinalini Honavar ◽  
Maria Augusta Cipriano ◽  
Joanne Lopes ◽  
Helder Coelho ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Lymph Node ◽  
Nucleic Acid ◽  
Lymph Nodes ◽  
Median Number ◽  
Nucleic Acid Amplification ◽  
Cytokeratin 19 ◽  
International Studies ◽  
Molecular Staging ◽  
One Step

Introduction: Approximately 20% - 30% of histological lymph node-negative patients with colorectal cancer relapse at five years after surgical treatment. This recurrence is likely due to occult nodal disease undetected by standard histopathological practice which has implications in terms of the clinical management of patients.Material and Methods: Lymph nodes were collected from colectomy specimens. A central section from each lymph node was histologically examined following haematoxylin-eosin staining and the remaining tissue was subjected to OSNA - one step nucleic acid amplification analysis.Results: A total of 1046 lymph nodes from 59 pN0 patients were assessed. Of these, 753 lymph nodes were examined by both methods. The median number of lymph nodes assessed with OSNA - one step nucleic acid amplification was 12 (IQR: 7;16). Among pN0 patients, 17 had OSNA - one step nucleic acid amplification-positive lymph nodes, resulting in a positive molecular staging rate of 28.8% (95% CI: 17.8 - 42.1). Among these patients, 12 (70.59%) were molecular-staged as pN1 and 5 (29.41%) were molecular staged as pN2. The tumour burden of lymph nodes assessed with OSNA - one step nucleic acid amplification ranged from 270 to 17 000 cytokeratin 19 mRNA copies/μL. Most of these patients (88.2%) were found to have lymph nodes with micrometastases only (250 - 4999 copies/μL).Discussion: We provide the results from the first study of the use of the OSNA - one step nucleic acid amplification assay in colorectal cancer patients in Portugal. Our results are in-line with other international studies, showing the improvement on patients’ staging by molecular examination of lymph nodes.Conclusion: In our study, 28.8% of patients with histologically negative lymph nodes were found to have metastatic lymph nodes using OSNA - one step nucleic acid molecular assessment. OSNA - one step nucleic acid assay allows a more accurate staging of patients with colorectal cancer and standardizes lymph node assessment.

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