Hypergravity exposure during gestation modifies the TCRβ repertoire of newborn mice

Scientific Reports
Stéphanie GhislinJean-Pol Frippiat

Abstract

During spaceflight, organisms are subjected to mechanical force changes (gravity (G) changes) that affect the immune system. However, gravitational effects on lymphopoiesis have rarely been studied. Consequently, we investigated whether the TCRβ repertoire, created by V(D)J recombination during T lymphopoiesis, is affected by hypergravity exposure during murine development. To address this question, C57BL/6j mice were mated in a centrifuge so that embryonic development, birth and TCRβ rearrangements occurred at 2G. Pups were sacrificed at birth, and their thymus used to quantify transcripts coding for factors required for V(D)J recombination and T lymphopoiesis. We also created cDNA mini-libraries of TCRβ transcripts to study the impact of hypergravity on TCRβ diversity. Our data show that hypergravity exposure increases the transcription of TCRβ chains, and of genes whose products are involved in TCR signaling, and affects the V(D)J recombination process. We also observed that ~85% of the TCRβ repertoire is different between hypergravity and control pups. These data indicate that changing a mechanical force (the gravity) during ontogeny will likely affect host immunity because properties of loops constituting TCR antigen-bindi...Continue Reading

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Citations

Oct 5, 2016·JCI Insight·Cara L BenjaminKrishna V Komanduri
Jul 28, 2018·FASEB Journal : Official Publication of the Federation of American Societies for Experimental Biology·Coralie FonteJean-Pol Frippiat
Dec 7, 2018·FASEB Journal : Official Publication of the Federation of American Societies for Experimental Biology·Georg TascherFabrice Bertile
Sep 13, 2020·FASEB Journal : Official Publication of the Federation of American Societies for Experimental Biology·Jing WangLingqiang Zhang
Jul 14, 2017·Scientific Reports·Cora S ThielOliver Ullrich
Jun 30, 2019·Scientific Reports·Corentine AlauzetJean-Pol Frippiat
Oct 14, 2020·FASEB Journal : Official Publication of the Federation of American Societies for Experimental Biology·Judith-Irina BuchheimJean-Pol Frippiat
Oct 30, 2020·International Journal of Molecular Sciences·Corentine AlauzetJean-Pol Frippiat

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Methods Mentioned

BETA
acetylation
PCR
ELISA

Software Mentioned

quest
HighV
IMGT
BLAST
Hypergravity

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