Evidence map›Paper›PMID 19785746›Full record

ArticleBMC immunology2009

Prerequisites for cytokine measurements in clinical trials with multiplex immunoassays.

Wilco de Jager, Katarzyna Bourcier, Ger T Rijkers, Berent J Prakken, Vicki Seyfert-Margolis

2 registry-linked trialsAbstract read
In one paragraph

Article in BMC immunology, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to 2 registered trials, which are not on this map. Cited by 213 papers, 7 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
213citing papers in PubMed, 7 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.

NCT03486431 nacompletednot on this mapstarted 2017, after this paper: background citation

A Phase I Dose-escalation Trial of Stereotactic Ablative Body Radiotherapy (SABR) for Non-spine Bone & Lymph Node Oligometastates

TypeinterventionalSponsorCancer Research AntwerpRan2017 to 2019Enrolled90ConditionsMetastatic CancerArmsStereotactic Ablative Radiotherapy (SABR)
NCT04598334 unknown statusnot on this mapstarted 2022, after this paper: background citation

Investigating the Inflammatory Cytokines and Cytokine Storm Among Bangladeshi Patients With COVID-19: a Prospective, Observational Study

TypeobservationalSponsorInternational Centre for Diarrhoeal Disease Research, BangladeshRan2022 to 2022Enrolled75ConditionsCytokine Storm, COVID-19
3 · Its place in the literature

Who cites it

213 citing papers in PubMed, 7 syntheses or guidelines pooled it.

  1. Pooled it
  2. Inflammatory Biomarkers in Exhaled Breath Condensate: A Systematic Review.International journal of molecular sciences · 2022
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  11. The role of IL-1 in postprandial fatigue.Molecular metabolism · 2018
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153 more citing papers are in PubMed but not listed here.

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

5 authors.

Wilco de JagerDepartment of Pediatric Immunology, Centre for Molecular and Cellular Intervention (CMCI), University Medical Centre Utrecht, Utrecht, The Netherlands. wjager@umcutrecht.nl
Katarzyna Bourcier
Ger T Rijkers
Berent J Prakken
Vicki Seyfert-Margolis

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundGrowing knowledge about cellular interactions in the immune system, including the central role of cytokine networks, has lead to new treatments using monoclonal antibodies that block specific components of the immune system. Systemic cytokine concentrations can serve as surrogate outcome parameters of these interventions to study inflammatory pathways operative in patients in vivo. This is now possible due to novel technologies such as multiplex immunoassays (MIA) that allows detection of multiple cytokines in a single sample. However, apparently trivial underappreciated processes, (sample handling and storage, interference of endogenous plasma proteins) can greatly impact the reliability and reproducibility of cytokine detection.Therefore we set out to investigate several processes that might impact cytokine profiles such as blood collecting tubes, duration of storage, and number of freeze thawing cycles.

resultsSince under physiological conditions cytokine concentrations normally are low or undetectable we spiked cytokines in the various plasma and serum samples. Overall recoveries ranged between 80-120%. Long time storage showed cytokines are stable for a period up to 2 years of storage at -80 degrees C. After 4 years several cytokines (IL-1alpha, IL-1beta, IL-10, IL-15 and CXCL8) degraded up to 75% or less of baseline values. Furthermore we show that only 2 out of 15 cytokines remained stable after several freeze-thawing cycles. We also demonstrate implementation of an internal control for multiplex cytokine immunoassays.

conclusionAll together we show parameters which are essential for measurement of cytokines in the context of clinical trials.

Indexed as

ImmunoassayBlood Specimen CollectionCells, CulturedClinical Trials as TopicCytokinesEdetic AcidFreezingHeparinHumansLeukocytes, MononuclearLipopolysaccharidesPhytohemagglutininsProtein StabilityReference StandardsReproducibility of ResultsCytokinesEdetic AcidHeparinLipopolysaccharidesPhytohemagglutinins

Identifiers

PMID19785746
PMCPMC2761376

What OpenQuestion holds

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Registered trials

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.