Evidence map›Paper›PMID 25585297›Full record

ArticleCells2015

High Reproducibility of ELISPOT Counts from Nine Different Laboratories.

Srividya Sundararaman, Alexey Y Karulin, Tameem Ansari, Nadine BenHamouda, Judith Gottwein, Sreenivas Laxmanan, Steven M Levine, John T Loffredo, Stephanie McArdle, Christine Neudoerfl and 4 more

Open access · goldAbstract read
In one paragraph

Article in Cells, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.

0numbers the graph read from it
0cells of the map it votes in
13citing papers in PubMed
1.0field-weighted citation impact, top 25% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

13 citing papers in PubMed, 30 citations in OpenAlex.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

14 authors at 6 institutions in 5 countries.

Srividya SundararamanCellular Technology Limited, Shaker Hts. 44122, OH, USA. srividya.sundararaman@immunospot.com.
Alexey Y KarulinCellular Technology Limited, Shaker Hts. 44122, OH, USA. ayk@immunospot.com.
Tameem AnsariCellular Technology Limited, Shaker Hts. 44122, OH, USA. tameem.ansari@immunospot.com.
Nadine BenHamoudaEuropéen Georges Pompidou, Paris 75015, France. nadine.benhamouda@egp.aphp.fr.
Judith GottweinCopenhagen Hepatitis C Program (CO-HEP), Department of Infectious Diseases and Clinical Research Centre, Copenhagen University Hospital, Hvidovre and Department of International Health, Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen 2650, Denmark. judith@gottwein.eu.
Sreenivas LaxmananDevelopment Translational Medicine, Biogen Idec, Cambridge 02142, MA, USA. srilaxmanan@gmail.com.
Steven M LevineImmuno-Virology Drug Discovery, Bristol-Myers Squibb, Wallingford 06492, CT, USA. steven.m.levine@bms.com.
John T LoffredoImmuno-Sciences Biology Drug Discovery, Bristol-Myers Squibb, Princeton 08543, NJ, USA. John.Loffredo@bms.com.
Stephanie McArdleNottingham Trent University, Nottingham NG118NS, UK. stephanie.mcardle@ntu.ac.uk.
Christine NeudoerflMedizinische Hochschule Hannover 30625, Germany. Neudoerfl.Christine@mh-hannover.de.
Diana RoenPharmasan Labs, Osceola 54020, WI, USA. diana.roen@pharmasan.com.
Karina SilinaCellular Technology Limited, Shaker Hts. 44122, OH, USA. karina@biomed.lu.lv.
Mackenzie WelchDevelopment Translational Medicine, Biogen Idec, Cambridge 02142, MA, USA. Mackenzie.Welch@biogenidec.com.
Paul V LehmannCellular Technology Limited, Shaker Hts. 44122, OH, USA. pvl@immunospot.com.
Biogen (United States) · USBristol-Myers Squibb (United States) · USLatvian Biomedical Research and Study Centre · LVMedizinische Hochschule Hannover · DENottingham Trent University · GBUniversity of Copenhagen · DK

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The primary goal of immune monitoring with ELISPOT is to measure the number of T cells, specific for any antigen, accurately and reproducibly between different laboratories. In ELISPOT assays, antigen-specific T cells secrete cytokines, forming spots of different sizes on a membrane with variable background intensities. Due to the subjective nature of judging maximal and minimal spot sizes, different investigators come up with different numbers. This study aims to determine whether statistics-based, automated size-gating can harmonize the number of spot counts calculated between different laboratories. We plated PBMC at four different concentrations, 24 replicates each, in an IFN-γ ELISPOT assay with HCMV pp65 antigen. The ELISPOT plate, and an image file of the plate was counted in nine different laboratories using ImmunoSpot® Analyzers by (A) Basic Count™ relying on subjective counting parameters set by the respective investigators and (B) SmartCount™, an automated counting protocol by the ImmunoSpot® Software that uses statistics-based spot size auto-gating with spot intensity auto-thresholding. The average coefficient of variation (CV) for the mean values between independent laboratories was 26.7% when counting with Basic Count™, and 6.7% when counting with SmartCount™. Our data indicates that SmartCount™ allows harmonization of counting ELISPOT results between different laboratories and investigators.

Identifiers

PMID25585297
PMCPMC4381207
OpenAlexW2022074909

What OpenQuestion holds

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LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.