scholarly journals Evaluation of Formalin-fixed Paraffin-embedded Tissue Samples Diagnosed by Histopathology as Echinococcus in Çorum

2021 ◽  
Vol 45 (4) ◽  
pp. 262-267
Author(s):  
Yılmaz Baş ◽  
Yunus Emre Beyhan ◽  
Havva Hande Keser Şahin ◽  
Tuğba Özçerezci ◽  
Dursun Karasartova ◽  
...  
Keyword(s):  
Tissue Samples ◽  
Formalin Fixed Paraffin ◽  
Formalin Fixed Paraffin Embedded ◽  
Formalin Fixed

scholarly journals The Dutch National TissueArchive Portal enables efficient, consistent, and transparent procurement of diagnostic tissue samples for scientific use

2021 ◽  
Author(s):  
Robin Verjans ◽  
Annette H. Bruggink ◽  
Robby Kibbelaar ◽  
Jos Bart ◽  
Aletta Debernardi ◽  
...  
Keyword(s):  
The Netherlands ◽  
Tissue Sample ◽  
Ffpe Tissue ◽  
Tissue Samples ◽  
Internet Portal ◽  
Formalin Fixed Paraffin ◽  
Practical Support ◽  
Formalin Fixed Paraffin Embedded ◽  
The Rich ◽  
Formalin Fixed

AbstractBiobanks play a crucial role in enabling biomedical research by facilitating scientific use of valuable human biomaterials. The PALGA foundation—a nationwide network and registry of histo- and cytopathology in the Netherlands—was established to promote the provision of data within and between pathology departments, and to make the resulting knowledge available for healthcare. Apart from the pathology data, we aimed to utilize PALGA’s nationwide network to find and access the rich wealth of Formalin-Fixed Paraffin-Embedded (FFPE) tissue samples for scientific use.  We implemented the Dutch National TissueArchive Portal (DNTP) to utilize PALGA’s nationwide network for requesting FFPE tissue samples. The DNTP consists of (1) a centrally organized internet portal to improve the assessing, processing, harmonization, and monitoring of the procurement process, while (2) dedicated HUB-employees provide practical support at peripheral pathology departments. Since incorporation of the DNTP, both the number of filed requests for FFPE tissue samples and the amount of HUB-mediated support increased 55 and 29% respectively. In line, the sample procurement duration time decreased significantly (− 47%). These findings indicate that implementation of the DNTP improved the frequency, efficiency, and transparency of FFPE tissue sample procurement for research in the Netherlands. To conclude, the need for biological resources is growing persistently to enable precision medicine. Here, we access PALGA’s national, pathology network by implementation of the DNTP to allow for efficient, consistent, and transparent exchange of FFPE tissue samples for research across the Netherlands.

Microsatellite instability evaluation: which test to use for endometrial cancer?

2021 ◽  
pp. jclinpath-2021-207723
Author(s):  
Paola Rafaniello-Raviele ◽  
Ilaria Betella ◽  
Alessandra Rappa ◽  
Davide Vacirca ◽  
Gianluca Tolva ◽  
...  
Keyword(s):  
Endometrial Cancer ◽  
Microsatellite Instability ◽  
Automated System ◽  
Tissue Samples ◽  
Valuable Alternative ◽  
Formalin Fixed Paraffin ◽  
Formalin Fixed Paraffin Embedded ◽  
Formalin Fixed ◽  
Mmr Proteins

AimsAnalysis of microsatellite instability (MSI) is strongly recommended in endometrial cancer (EC) and colorectal cancer to screen for Lynch syndrome, to predict prognosis and to determine optimal treatment and follow-up. In a large monoinstitutional series of ECs, we evaluated the reliability and accuracy of Idylla assay, a rapid, fully automated system to detect MSI, and we compared its performance with two routine reference methods.MethodsWe evaluated MSI status in 174 formalin-fixed, paraffin-embedded EC tissue samples using immunohistochemistry (IHC) for mismatch repair (MMR) proteins and Idylla assay. Samples with discordant or equivocal results were analysed with a third technique, the Promega MSI kit.ResultsIdylla MSI assay and IHC were highly concordant (overall agreement: 154/170=90.59%, 95% CI 85.26% to 94.12%). However, in four samples, MMR-IHC staining was equivocal; moreover, 16 cases showed discordant results, that is, MMR deficient using IHC and microsatellite stable using Idylla. These 20 samples were reanalysed using the MSI-Promega kit, which showed the same results of Idylla assay in 18/20 cases (overall agreement: 90%, 95% CI 69.90% to 97.21%).ConclusionsOur results suggest that IHC is an efficient method to determine MMR status in ECs. However, the Idylla MSI assay is a rapid and reliable tool to define MSI status, and it could represent a valuable alternative to conventional MSI-PCR methods.

scholarly journals Preliminary Comparison of Quantity, Quality, and Microarray Performance of RNA Extracted From Formalin-fixed, Paraffin-embedded, and Unfixed Frozen Tissue Samples

2006 ◽  
Vol 54 (11) ◽  
pp. 1229-1237 ◽  
Author(s):  
Marshall S. Scicchitano ◽  
Deidre A. Dalmas ◽  
Melissa A. Bertiaux ◽  
Shawn M. Anderson ◽  
Leah R. Turner ◽  
...  
Keyword(s):  
Tissue Samples ◽  
Preliminary Comparison ◽  
Formalin Fixed Paraffin ◽  
Frozen Tissue ◽  
Formalin Fixed Paraffin Embedded ◽  
Formalin Fixed

scholarly journals Evaluation of 3 molecular-based assays for microsatellite instability detection in formalin-fixed tissues of patients with endometrial and colorectal cancers

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Pauline Gilson ◽  
Julien Levy ◽  
Marie Rouyer ◽  
Jessica Demange ◽  
Marie Husson ◽  
...  
Keyword(s):  
Microsatellite Instability ◽  
Sensitivity And Specificity ◽  
Tissue Samples ◽  
Fast Screening ◽  
Formalin Fixed Paraffin ◽  
Golden Standard ◽  
Formalin Fixed Paraffin Embedded ◽  
Analysis System ◽  
Msi Analysis ◽  
Formalin Fixed

Abstract Microsatellite instability (MSI) status is routinely assessed in patients with colorectal and endometrial cancers as it contributes to Lynch syndrome initial screening, tumour prognosis and selecting patients for immunotherapy. Currently, standard reference methods recommended for MSI/dMMR (deficient MisMatch Repair) testing consist of immunohistochemistry and pentaplex PCR-based assays, however, novel molecular-based techniques are emerging. Here, we aimed to evaluate the performance of a custom capture-based NGS method and the Bio-Rad ddPCR and Idylla approaches for the determination of MSI status for theranostic purposes in 30 formalin-fixed paraffin embedded (FFPE) tissue samples from patients with endometrial (n = 15) and colorectal (n = 15) cancers. All samples were previously characterised using IHC and Promega MSI Analysis System and these assays set as golden standard. Overall agreement, sensitivity and specificity of our custom-built NGS panel were 93.30%, 93.75% and 92.86% respectively. Overall agreement, sensitivity and specificity were 100% with the Idylla MSI system. The Bio-Rad ddPCR MSI assay showed a 100% concordance, sensitivity and specificity. The custom capture-based NGS, Bio-Rad ddPCR and Idylla approaches represent viable and complementary options to IHC and Promega MSI Analysis System for the detection of MSI. Bio-Rad ddPCR and Idylla MSI assays accounts for easy and fast screening assays while the NGS approach offers the advantages to simultaneously detect MSI and clinically relevant genomic alterations.

scholarly journals Molecular Markers for Prostate Cancer in Formalin-Fixed Paraffin-Embedded Tissues

2013 ◽  
Vol 2013 ◽  
pp. 1-15 ◽  
Author(s):  
Tamara Sequeiros ◽  
Marta García ◽  
Melania Montes ◽  
Mireia Oliván ◽  
Marina Rigau ◽  
...  
Keyword(s):  
Prostate Cancer ◽  
Molecular Markers ◽  
Tumor Grade ◽  
Developed Countries ◽  
Response To Therapy ◽  
Tissue Samples ◽  
Formalin Fixed Paraffin ◽  
Formalin Fixed Paraffin Embedded ◽  
Ffpe Tissues ◽  
Formalin Fixed

Prostate cancer (PCa) is the most frequently diagnosed type of cancer in developed countries. The decisive method of diagnosis is based on the results of biopsies, morphologically evaluated to determine the presence or absence of cancer. Although this approach leads to a confident diagnosis in most cases, it can be improved by using the molecular markers present in the tissue. Both miRNAs and proteins are considered excellent candidates for biomarkers in formalin-fixed paraffin-embedded (FFPE) tissues, due to their stability over long periods of time. In the last few years, a concerted effort has been made to develop the necessary tools for their reliable measurement in these types of samples. Furthermore, the use of these kinds of markers may also help in establishing tumor grade and aggressiveness, as well as predicting the possible outcomes in each particular case for the different treatments available. This would aid clinicians in the decision-making process. In this review, we attempt to summarize and discuss the potential use of microRNA and protein profiles in FFPE tissue samples as markers to better predict PCa diagnosis, progression, and response to therapy.

Abstract 525: Automated microRNA detection in formalin-fixed, paraffin-embedded tissue samples

2014 ◽  
Author(s):  
Zeyu (David) Jiang ◽  
Anne Pedata ◽  
Taylor Shingler ◽  
Lauren Behman ◽  
David Chafin ◽  
...  
Keyword(s):  
Tissue Samples ◽  
Microrna Detection ◽  
Formalin Fixed Paraffin ◽  
Formalin Fixed Paraffin Embedded ◽  
Formalin Fixed

scholarly journals Deciphering the Immune Microenvironment on A Single Archival Formalin-Fixed Paraffin-Embedded Tissue Section by An Immediately Implementable Multiplex Fluorescence Immunostaining Protocol

Cancers ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 2449 ◽  
Author(s):  
Adrien Guillot ◽  
Marlene S. Kohlhepp ◽  
Alix Bruneau ◽  
Felix Heymann ◽  
Frank Tacke
Keyword(s):  
Immune Cell ◽  
Simple Procedure ◽  
Parenchymal Cell ◽  
Ffpe Tissue ◽  
Immune Microenvironment ◽  
Tissue Samples ◽  
Tissue Organization ◽  
Formalin Fixed Paraffin ◽  
Formalin Fixed Paraffin Embedded ◽  
Formalin Fixed

Technological breakthroughs have fundamentally changed our understanding on the complexity of the tumor microenvironment at the single-cell level. Characterizing the immune cell composition in relation to spatial distribution and histological changes may provide important diagnostic and therapeutic information. Immunostaining on formalin-fixed paraffin-embedded (FFPE) tissue samples represents a widespread and simple procedure, allowing the visualization of cellular distribution and processes, on preserved tissue structure. Recent advances in microscopy and molecular biology have made multiplexing accessible, yet technically challenging. We herein describe a novel, simple and cost-effective method for a reproducible and highly flexible multiplex immunostaining on archived FFPE tissue samples, which we optimized for solid organs (e.g., liver, intestine, lung, kidney) from mice and humans. Our protocol requires limited specific equipment and reagents, making multiplexing (>12 antibodies) immediately implementable to any histology laboratory routinely performing immunostaining. Using this method on single sections and combining it with automated whole-slide image analysis, we characterize the hepatic immune microenvironment in preclinical mouse models of liver fibrosis, steatohepatitis and hepatocellular carcinoma (HCC) and on human-patient samples with chronic liver diseases. The data provide useful insights into tissue organization and immune–parenchymal cell-to-cell interactions. It also highlights the profound macrophage heterogeneity in liver across premalignant conditions and HCC.

Sign in / Sign up

Export Citation Format

Share Document