Evidence map›Paper›PMID 28270111›Full record

ArticleBMC immunology2017

An optimized IFN-γ ELISpot assay for the sensitive and standardized monitoring of CMV protein-reactive effector cells of cell-mediated immunity.

Sascha Barabas, Theresa Spindler, Richard Kiener, Charlotte Tonar, Tamara Lugner, Julia Batzilla, Hanna Bendfeldt, Anne Rascle, Benedikt Asbach, Ralf Wagner and 1 more

Abstract readValidation Study
In one paragraph

Article in BMC immunology, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 43 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
43citing papers in PubMed, 2 pooled it
–field-weighted citation impact
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

43 citing papers in PubMed, 2 syntheses or guidelines pooled it.

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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

11 authors.

Sascha BarabasLophius Biosciences GmbH, Am BioPark 13, 93053, Regensburg, Germany.
Theresa SpindlerLophius Biosciences GmbH, Am BioPark 13, 93053, Regensburg, Germany.
Richard KienerInstitute of Medical Microbiology and Hygiene, University Regensburg, Franz-Josef-Strauss-Allee 11, 93053, Regensburg, Germany.
Charlotte TonarLophius Biosciences GmbH, Am BioPark 13, 93053, Regensburg, Germany.
Tamara LugnerLophius Biosciences GmbH, Am BioPark 13, 93053, Regensburg, Germany.
Julia BatzillaLophius Biosciences GmbH, Am BioPark 13, 93053, Regensburg, Germany.
Hanna BendfeldtLophius Biosciences GmbH, Am BioPark 13, 93053, Regensburg, Germany.
Anne RascleLophius Biosciences GmbH, Am BioPark 13, 93053, Regensburg, Germany.
Benedikt AsbachInstitute of Medical Microbiology and Hygiene, University Regensburg, Franz-Josef-Strauss-Allee 11, 93053, Regensburg, Germany.
Ralf WagnerInstitute of Medical Microbiology and Hygiene, University Regensburg, Franz-Josef-Strauss-Allee 11, 93053, Regensburg, Germany.
Ludwig DemlLophius Biosciences GmbH, Am BioPark 13, 93053, Regensburg, Germany. Ludwig.Deml@lophius.com.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundIn healthy individuals, Cytomegalovirus (CMV) infection is efficiently controlled by CMV-specific cell-mediated immunity (CMI). Functional impairment of CMI in immunocompromized individuals however can lead to uncontrolled CMV replication and severe clinical complications. Close monitoring of CMV-specific CMI is therefore clinically relevant and might allow a reliable prognosis of CMV disease as well as assist personalized therapeutic decisions.

methodsObjective of this work was the optimization and technical validation of an IFN-γ ELISpot assay for a standardized, sensitive and reliable quantification of CMV-reactive effector cells. T-activated® immunodominant CMV IE-1 and pp65 proteins were used as stimulants. All basic assay parameters and reagents were tested and optimized to establish a user-friendly protocol and maximize the signal-to-noise ratio of the ELISpot assay.

resultsOptimized and standardized ELISpot revealed low intra-assay, inter-assay and inter-operator variability (coefficient of variation CV below 22%) and CV inter-site was lower than 40%. Good assay linearity was obtained between 6 × 10

conclusionThe combined use of T-activated® IE-1 and pp65 proteins for the stimulation of PBMC with the optimized IFN-γ ELISpot assay represents a highly standardized, valuable tool to monitor the functionality of CMV-specific CMI with great sensitivity and reliability.

Indexed as

AdultCD4-Positive T-LymphocytesCD8-Positive T-LymphocytesCells, CulturedCytomegalovirusCytomegalovirus InfectionsCytotoxicity, ImmunologicEnzyme-Linked Immunospot AssayFemaleHumansImmediate-Early ProteinsImmunity, CellularInterferon-gammaKiller Cells, NaturalMaleMiddle Agedcytomegalovirus matrix protein 65kDaIE1 protein, cytomegalovirusImmediate-Early ProteinsInterferon-gammaPhosphoproteinsViral Matrix ProteinsCD4 +CD8 +Cell-mediated immunityCMVCytomegalovirusCytotoxic T lymphocyte (CTL)ELISpotIE-1Natural killer (NK)NKT-likepp65T helper (Th)

Identifiers

PMID28270111
PMCPMC5339961

What OpenQuestion holds

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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.