Evidence map›Paper›PMID 34504500›Full record

ArticleFrontiers in immunology2021

Alterations in Saliva and Plasma Cytokine Concentrations During Long-Duration Spaceflight.

Stephanie S Krieger, Sara R Zwart, Satish Mehta, Honglu Wu, Richard J Simpson, Scott M Smith, Brian Crucian

Open access · goldAbstract read
In one paragraph

Article in Frontiers in immunology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 29 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
29citing papers in PubMed, 2 pooled it
5.2field-weighted citation impact, top 3% 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

29 citing papers in PubMed, 2 syntheses or guidelines pooled it, 57 citations in OpenAlex.

  1. [Mechanisms and protective strategies for astronaut skin injury in deep space environments].Zhong nan da xue xue bao. Yi xue ban = Journal of Central South University. Medical sciences · 2025
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  18. Frontiers in immunology · 2024
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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

7 authors at 6 institutions in 1 country.

Stephanie S KriegerKBR, Human Health and Performance Directorate, Houston, TX, United States.
Sara R ZwartUniversity of Texas Medical Branch (UTMB), Preventive Medicine and Population Health, Galveston, TX, United States.
Satish MehtaJES Tech, Human Health and Performance Directorate, Houston, TX, United States.
Honglu WuNational Aeronautics and Space Administration (NASA) Johnson Space Center, Human Health and Performance Directorate, Houston, TX, United States.
Richard J SimpsonDepartment of Nutritional Sciences, University of Arizona, Tucson, AZ, United States.
Scott M SmithNational Aeronautics and Space Administration (NASA) Johnson Space Center, Human Health and Performance Directorate, Houston, TX, United States.
Brian CrucianNational Aeronautics and Space Administration (NASA) Johnson Space Center, Human Health and Performance Directorate, Houston, TX, United States.
National Aeronautics and Space Administration · USJES Tech (United States) · USJohnson Space Center · USKBR (United States) · USThe University of Texas Medical Branch at Galveston · USUniversity of Arizona Cancer Center

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Long-duration spaceflight is known to cause immune dysregulation in astronauts. Biomarkers of immune system function are needed to determine both the need for and effectiveness of potential immune countermeasures for astronauts. Whereas plasma cytokine concentrations are a well-established biomarker of immune status, salivary cytokine concentrations are emerging as a sensitive indicator of stress and inflammation. For this study, to aid in characterizing immune dysregulation during spaceflight, plasma and saliva cytokines were monitored in astronauts before, during and after long-duration spaceflight onboard the International Space Station. Blood was collected from 13 astronauts at 3 timepoints before, 5 timepoints during and 3 timepoints after spaceflight. Saliva was collected from 6 astronauts at 2 timepoints before spaceflight, 2 timepoints during and 3 timepoints following spaceflight. Samples were analyzed using multiplex array technology. Significant increases in the plasma concentration of IL-3, IL-15, IL-12p40, IFN-α2, and IL-7 were observed during spaceflight compared to before flight baseline. Significant decreases in saliva GM-CSF, IL-12p70, IL-10 and IL-13 were also observed during spaceflight as compared to compared to before flight baseline concentrations. Additionally, plasma TGFβ1 and TGFβ2 concentrations tended to be consistently higher during spaceflight, although these did not reach statistical significance. Overall, the findings confirm an

Indexed as

Space FlightAstronautsBiomarkersCytokinesFemaleHormonesHumansImmunity, InnateMaleMiddle AgedSalivaStress, PhysiologicalTime FactorsBiomarkersCytokinesHormonescytokineimmune systemplasmasalivaspaceflight

Identifiers

PMID34504500
PMCPMC8422944
OpenAlexW3195622846

What OpenQuestion holds

Textmetadata
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.