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Journal of Molecular Diagnostics: JMD

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https://www.readbyqxmd.com/read/29305225/droplet-digital-pcr-for-mutation-detection-in-formalin-fixed-paraffin-embedded-melanoma-tissues-a-comparison-with-sanger-sequencing-and-pyrosequencing
#1
Ashleigh C McEvoy, Benjamin A Wood, Nima M Ardakani, Michelle Pereira, Robert Pearce, Lester Cowell, Cleo Robinson, Fabienne Grieu-Iacopetta, Alexander J Spicer, Benhur Amanuel, Melanie Ziman, Elin S Gray
Identification of somatic mutations is crucial to guide therapeutic decisions for personalized melanoma treatment. However, genetic analysis of the tumor is usually performed on limited and often low-quality DNA, from tumors with low tumor cellularity and high tumor heterogeneity. Different mutation detection platforms exist with varying analytical sensitivities. Here we evaluated the detection of common mutations in BRAF, NRAS, and TERT-promoter in 40 melanoma formalin-fixed, paraffin-embedded tissues using droplet digital PCR (ddPCR), and compared the results to the detection rate obtained by Sanger sequencing and pyrosequencing...
January 2, 2018: Journal of Molecular Diagnostics: JMD
https://www.readbyqxmd.com/read/29305224/snpitty-an-intuitive-web-application-for-interactive-b-allele-frequency-and-copy-number-visualization-of-next-generation-sequencing-data
#2
Job van Riet, Niels M G Krol, Peggy N Atmodimedjo, Erwin Brosens, Wilfred F J van IJcken, Maurice P H M Jansen, John W M Martens, Leendert H Looijenga, Guido Jenster, Hendrikus J Dubbink, Winand N M Dinjens, Harmen J G van de Werken
Exploration and visualization of next-generation sequencing data is crucial for clinical diagnostics. Software allowing simultaneous visualization of multiple regions-of-interest coupled with dynamic heuristic filtering of genetic aberrations is however lacking. Therefore, we developed the web-application SNPitty that allows interactive visualization and interrogation of variant call format (VCF) files by utilizing B-allele frequencies of single nucleotide polymorphisms and single nucleotide variants, coverage metrics and copy-numbers analysis results...
January 2, 2018: Journal of Molecular Diagnostics: JMD
https://www.readbyqxmd.com/read/29277636/evaluation-of-diagnostic-utility-of-a-high-risk-human-papillomavirus-pcr-test-on-formalin-fixed-paraffin-embedded-head-and-neck-tumor-tissues
#3
Albert Njoroge Huho, Nour Yadak, Thèrése Jeanne Bocklage, Shangxin Yang
The increasing prevalence of high-risk human papillomavirus (HR-HPV)-associated head and neck squamous cell carcinoma (HNSCC) has prompted strong clinical demands for detecting HR-HPV directly in the tumor. Although p16 immunohistochemistry (IHC) has been the standard testing method, it has limitations including false positivity, lack of sensitivity in low tumor cell samples such as fine needle aspirate (FNA), and its subjectivity. We developed a modified method based on the Roche Cobas 4800 HR-HPV PCR assay and evaluated the performance characteristics and the diagnostic utility of this assay for direct HR-HPV detection in the HNSCC samples...
December 19, 2017: Journal of Molecular Diagnostics: JMD
https://www.readbyqxmd.com/read/29277635/a-novel-and-reliable-method-to-detect-microsatellite-instability-in-colorectal-cancer-by-next-generation-sequencing
#4
Lizhen Zhu, Yanqin Huang, Xuefeng Fang, Chenglin Liu, Wanglong Deng, Chenhan Zhong, Jinghong Xu, Dong Xu, Ying Yuan
Two types of molecular tests have been established to assess the deficiency of DNA mismatch repair (MMR) system: microsatellite instability (MSI) and immunohistochemical (IHC) analysis. We have developed a reliable method to analyze the MSI status by next-generation sequencing (NGS) based on read count distribution. A total of 91 patients with primary colorectal cancer were recruited. These patients included 54 cases with the loss of expression of any MMR protein in IHC suggesting deficient MMR (dMMR), and 37 cases of colorectal cancer with staining of all four MMR proteins in IHC, suggesting proficient MMR (pMMR) in postoperative sample...
December 19, 2017: Journal of Molecular Diagnostics: JMD
https://www.readbyqxmd.com/read/29269280/conventional-and-single-molecule-targeted-sequencing-method-for-specific-variant-detection-in-ikbkg-whilst-bypassing-the-ikbkgp1-pseudogene
#5
Glynis Frans, Wim Meert, Jutte Van der Werff Ten Bosch, Isabelle Meyts, Xavier Bossuyt, Joris R Vermeesch, Matthew S Hestand
In addition to Sanger sequencing, next-generation sequencing of gene panels and exomes has emerged as a standard diagnostic tool in many laboratories. However, these captures can miss regions, have poor efficiency, or capture pseudogenes which hamper proper diagnoses. One such example is the primary immunodeficiency-associated gene IKBKG. Its pseudogene IKBKGP1 makes traditional capture methods aspecific. We therefore developed a long-range PCR method to efficiently target IKBKG, as well as two associated genes (IRAK4 and MYD88), whilst bypassing the IKBKGP1 pseudogene...
December 18, 2017: Journal of Molecular Diagnostics: JMD
https://www.readbyqxmd.com/read/29269279/evaluation-of-a-urine-based-rapid-molecular-diagnostic-test-with-potential-to-be-used-at-point-of-care-for-pulmonary-tuberculosis-cape-town-cohort
#6
Krutarth Patel, Matilde Nagel, Maria Wesolowski, Stefan Dees, Eric Rivera-Milla, Christof Geldmacher, Keertan Dheda, Michael Hoelscher, Ines Labugger
c diagnosis among sputum-scarce patients is time consuming. Thus, an alternative of non-sputum diagnostic is urgently needed. The Mycobacterium tuberculosis-specific transrenal (Tr) DNA from urine is a potential target for TB diagnostics. In this study, a new urine-based Tr-DNA molecular assay was evaluated for diagnosis of pulmonary tuberculosis among 428 adult pulmonary TB suspects (164 HIV-positive, 263 HIV-negative) from Cape Town, South Africa. Tr-DNA was isolated from 4 mL EDTA urine, and rapid double-stranded primer-based PCR method performed targeting Mycobacterium tuberculosis-specific direct repeat region...
December 18, 2017: Journal of Molecular Diagnostics: JMD
https://www.readbyqxmd.com/read/29269278/the-history-and-impact-of-molecular-coding-changes-on-coverage-and-reimbursement-of-molecular-diagnostic-tests-transition-from-stacking-codes-to-the-current-molecular-code-set-including-genomic-sequencing-procedures
#7
Susan J Hsiao, Mahesh M Mansukhani, Melissa C Carter, Anthony N Sireci
Changes in coding and coverage create uncertain reimbursement environment for molecular pathology laboratories. We analyzed our experience with two representative molecular oncology tests: a T-cell receptor (TCR) beta rearrangement test and a large (467 gene) cancer next-generation sequencing panel the Columbia Combined Cancer Panel, CCCP. Prior to 2013, the TCR beta test was coded using "stacked" current procedural terminology codes and subsequently transitioned to a tier 1 code. CCCP was coded using a combination of tier 1 and 2 codes until 2015, when a new Genomic Sequencing Procedure code was adopted...
December 18, 2017: Journal of Molecular Diagnostics: JMD
https://www.readbyqxmd.com/read/29269277/comprehensive-genomic-profiling-of-malignant-effusions-in-patients-with-metastatic-lung-adenocarcinoma
#8
Soo-Ryum Yang, Chieh-Yu Lin, Henning Stehr, Steven R Long, Christina S Kong, Gerald J Berry, James L Zehnder, Christian A Kunder
Cytology samples are being increasingly utilized for comprehensive molecular testing. Although fine-needle aspirates are adequate substrates for high-throughput sequencing, the suitability of malignant body fluids remains largely unexplored. Herein, we investigated the adequacy and utility of performing targeted next-generation sequencing (NGS) on malignant effusions from patients with metastatic lung adenocarcinoma. Thirty-two effusion samples that were submitted for hybrid capture-based NGS using a clinically validated solid tumor genotyping panel were examined...
December 18, 2017: Journal of Molecular Diagnostics: JMD
https://www.readbyqxmd.com/read/29229290/simple-detection-of-telomere-fusions-in-pancreatic-cancer-intraductal-papillary-mucinous-neoplasm-and-pancreatic-cyst-fluid
#9
Tatsuo Hata, Marco Dal Molin, Anne McGregor-Das, Tae Jun Song, Christopher Wolfgang, James R Eshleman, Ralph H Hruban, Michael Goggins
Telomere end-to-end fusions are an important source of chromosomal instability that arise in cells with critically shortened telomeres. We developed a nested real-time quantitative PCR method for telomere fusion detection in pancreatic ductal adenocarcinomas, intraductal papillary mucinous neoplasms (IPMNs), and IPMN cyst fluids. Ninety-one pancreatic cancer cell lines and xenograft samples, 93 IPMNs, and 93 surgically aspirated IPMN cyst fluid samples were analyzed. The association between telomere shortening, telomerase activity, and telomere fusion detection was evaluated...
December 6, 2017: Journal of Molecular Diagnostics: JMD
https://www.readbyqxmd.com/read/29154853/standards-and-guidelines-for-validating-next-generation-sequencing-bioinformatics-pipelines-a-joint-recommendation-of-the-association-for-molecular-pathology-and-the-college-of-american-pathologists
#10
REVIEW
Somak Roy, Christopher Coldren, Arivarasan Karunamurthy, Nefize S Kip, Eric W Klee, Stephen E Lincoln, Annette Leon, Mrudula Pullambhatla, Robyn L Temple-Smolkin, Karl V Voelkerding, Chen Wang, Alexis B Carter
Bioinformatics pipelines are an integral component of next-generation sequencing (NGS). Processing raw sequence data to detect genomic alterations has significant impact on disease management and patient care. Because of the lack of published guidance, there is currently a high degree of variability in how members of the global molecular genetics and pathology community establish and validate bioinformatics pipelines. Improperly developed, validated, and/or monitored pipelines may generate inaccurate results that may have negative consequences for patient care...
November 17, 2017: Journal of Molecular Diagnostics: JMD
https://www.readbyqxmd.com/read/29104083/development-and-evaluation-of-a-pan-sarcoma-fusion-gene-detection-assay-using-the-nanostring-ncounter-platform
#11
Kenneth T E Chang, Angela Goytain, Tracy Tucker, Aly Karsan, Cheng-Han Lee, Torsten O Nielsen, Tony L Ng
The NanoString nCounter assay is a high-throughput hybridization technique using target-specific probes that can be customized to test for numerous fusion transcripts in a single assay using RNA from formalin-fixed, paraffin-embedded material. We designed a NanoString assay targeting 174 unique fusion junctions in 25 sarcoma types. The study cohort comprised 212 cases, 96 of which showed fusion gene expression by the NanoString assay, including all 20 Ewing sarcomas, 11 synovial sarcomas, and 5 myxoid liposarcomas tested...
November 17, 2017: Journal of Molecular Diagnostics: JMD
https://www.readbyqxmd.com/read/29155049/is-tubulocystic-renal-cell-carcinoma-real-genomic-analysis-confirms-the-who-classification
#12
Yi Ding, Hiroshi Miyamoto, Paul G Rothberg
This commentary highlights the article by Lawrie et al that validates that tubulocystic renal cell carcinoma is a distinct type of renal neoplasm.
November 15, 2017: Journal of Molecular Diagnostics: JMD
https://www.readbyqxmd.com/read/29155048/telomere-diagnostics-for-pancreatic-neoplasms-and-cysts
#13
Loren Joseph
This commentary highlights the article by Hata et al that examines markers for assessing neoplastic progression.
November 15, 2017: Journal of Molecular Diagnostics: JMD
https://www.readbyqxmd.com/read/29249244/authors-reply
#14
LETTER
Marilyn M Li, Michael Datto, Eric J Duncavage, Shashikant Kulkarni, Neal I Lindeman, Somak Roy, Apostolia M Tsimberidou, Cindy L Vnencak-Jones, Daynna J Wolff, Anas Younes, Marina N Nikiforova
Authors' Reply to the Letter to the Editor by Montgomery et al (Identification of Germline Variants in Tumor Genomic Sequencing Analysis. J Mol Diagn 2017, 19:XXXX-XXXX).
January 2018: Journal of Molecular Diagnostics: JMD
https://www.readbyqxmd.com/read/29249243/identification-of-germline-variants-in-tumor-genomic-sequencing-analysis
#15
LETTER
Nathan D Montgomery, Sara R Selitsky, Nirali M Patel, D Neil Hayes, Joel S Parker, Karen E Weck
This Correspondence relates to the article by Li et al (Standards and Guidelines for the Interpretation and Reporting of Sequence Variants in Cancer: A Joint Consensus Recommendation of the Association for Molecular Pathology, American Society of Clinical Oncology, and the College of American Pathologists. J Mol Diagn 2017, 19:4-23).
January 2018: Journal of Molecular Diagnostics: JMD
https://www.readbyqxmd.com/read/29249242/navigating-the-peer-review-process
#16
EDITORIAL
Barbara Zehnbauer, Emily H Essex, Chhavi Chauhan
This editorial provides insights and guidelines for publishing in The Journal of Molecular Diagnostics.
January 2018: Journal of Molecular Diagnostics: JMD
https://www.readbyqxmd.com/read/29054399/determination-of-molecular-subtypes-of-diffuse-large-b-cell-lymphoma-using-a-reverse-transcriptase-multiplex-ligation-dependent-probe-amplification-classifier-a-calym-study
#17
Victor Bobée, Philippe Ruminy, Vinciane Marchand, Pierre-Julien Viailly, Ahmad Abdel Sater, Liana Veresezan, Fanny Drieux, Caroline Bérard, Elodie Bohers, Sylvain Mareschal, Sydney Dubois, Jean-Philippe Jais, Karen Leroy, Martin Figeac, Jean-Michel Picquenot, Thierry Jo Molina, Gilles Salles, Corinne Haioun, Hervé Tilly, Fabrice Jardin
Diffuse large B-cell lymphoma (DLBCL) is the most common non-Hodgkin lymphoma. It includes three major subtypes termed germinal center B-cell-like, activated B-cell-like, and primary mediastinal B-cell lymphoma. With the emergence of novel targeted therapies, accurate methods capable of interrogating this cell-of-origin classification should soon become essential in the clinics. To address this issue, we developed a novel gene expression profiling DLBCL classifier based on reverse transcriptase multiplex ligation-dependent probe amplification...
November 2017: Journal of Molecular Diagnostics: JMD
https://www.readbyqxmd.com/read/29061376/heterogeneity-of-braf-nras-and-tert-promoter-mutational-status-in-multiple-melanomas-and-association-with-mc1r-genotype-findings-from-molecular-and-immunohistochemical-analysis
#18
Cristina Pellegrini, Lucia Di Nardo, Gianluca Cipolloni, Claudia Martorelli, Marina De Padova, Ambra Antonini, Maria Giovanna Maturo, Laura Del Regno, Sara Strafella, Tamara Micantonio, Pietro Leocata, Ketty Peris, Maria Concetta Fargnoli
Data on somatic heterogeneity and germline-somatic interaction in multiple primary melanoma (MPM) patients are limited. We investigated the mutational status of BRAF, NRAS, and TERT promoter genes, in 97 melanomas of 44 MPM patients and compared molecular and immunohistochemical findings. We further evaluated the association of somatic alterations with the germline MC1R genotype. Mutations in BRAF gene were identified in 41.2% (40/97) of melanomas, in NRAS in 2.1% (2/97), and in TERT promoter in 19.6% (19/97)...
October 20, 2017: Journal of Molecular Diagnostics: JMD
https://www.readbyqxmd.com/read/29061375/evaluation-of-a-next-generation-sequencing-assay-for-brca1-and-brca2-mutation-detection
#19
Gabriele Lorenzo Capone, Anna Laura Putignano, Sharon Trujillo Saavedra, Irene Paganini, Roberta Sestini, Francesca Gensini, Irene De Rienzo, Laura Papi, Berardino Porfirio
The efficiency of a novel targeted next-generation sequencing (NGS) test, the Devyser BRCA kit, for a comprehensive analysis of all 48 coding exons of the high-risk breast/ovarian cancer susceptibility genes BRCA1 and BRCA2 has been assessed. The new assay intended to detect nucleotide substitutions, small deletions/insertions, and large deletions/duplications. To document the false-negative and false-positive rates of the NGS assay in the hands of end-users, 48 samples with previously identified 444 small-size variants and seven gross rearrangements were analyzed, showing 100% concordance with gold standards...
October 20, 2017: Journal of Molecular Diagnostics: JMD
https://www.readbyqxmd.com/read/29061374/analytical-validation-of-a-next-generation-sequencing-assay-to-monitor-immune-responses-in-solid-tumors
#20
Jeffrey M Conroy, Sarabjot Pabla, Sean T Glenn, Blake Burgher, Mary Nesline, Antonios Papanicolau-Sengos, Jonathan Andreas, Vincent Giamo, Felicia L Lenzo, Fiona C L Hyland, Angela Omilian, Wiam Bshara, Moachun Qin, Ji He, Igor Puzanov, Marc S Ernstoff, Mark Gardner, Lorenzo Galluzzi, Carl Morrison
We have developed a next-generation sequencing assay to quantify biomarkers of the host immune response in formalin-fixed, paraffin-embedded (FFPE) tumor specimens. This assay aims to provide clinicians with a comprehensive characterization of the immunologic tumor microenvironment as a guide for therapeutic decisions on patients with solid tumors. The assay relies on RNA-sequencing (seq) to semiquantitatively measure the levels of 43 transcripts related to anticancer immune responses and 11 transcripts that reflect the relative abundance of tumor-infiltrating lymphocytes, as well as on DNA-seq to estimate mutational burden...
October 20, 2017: Journal of Molecular Diagnostics: JMD
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