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Oxidative stress and neuroimmune proteins in a mouse model of autism

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Cell Stress and Chaperones Aims and scope

Abstract

Oxidative stress including decreased antioxidant enzyme activities, elevated lipid peroxidation, and accumulation of advanced glycation end products in the blood from children with autism spectrum disorders (ASD) has been reported. The mechanisms affecting the development of ASD remain unclear; however, toxic environmental exposures leading to oxidative stress have been proposed to play a significant role. The BTBRT+Itpr3tf/J (BTBR) strain provides a model to investigate the markers of oxidation in a mouse strain exhibiting ASD-like behavioral phenotypes. In the present study, we investigated the level of oxidative stress and its effects on immune cell populations, specifically oxidative stress affecting surface thiols (R-SH), intracellular glutathione (iGSH), and expression of brain biomarkers that may contribute to the development of the ASD-like phenotypes that have been observed and reported in BTBR mice. Lower levels of cell surface R-SH were detected on multiple immune cell subpopulations from blood, spleens, and lymph nodes and for sera R-SH levels of BTBR mice compared to C57BL/6 J (B6) mice. The iGSH levels of immune cell populations were also lower in the BTBR mice. Elevated protein expression of GATA3, TGM2, AhR, EPHX2, TSLP, PTEN, IRE1α, GDF15, and metallothionein in BTBR mice is supportive of an increased level of oxidative stress in BTBR mice and may underpin the pro-inflammatory immune state that has been reported in the BTBR strain. Results of a decreased antioxidant system suggest an important oxidative stress role in the development of the BTBR ASD-like phenotype.

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Abbreviations

Ab:

Antibody

AFM:

Alexa Fluor™ 488 C5 Maleimide

ASD:

Autism spectrum disorders

AhR:

Aryl hydrocarbon receptor

B6:

C57BL/6 J

CNS:

Central nervous system

GSSG:

Glutathione disulfide

iGSH:

Intracellular glutathione

GMFI:

Geometric mean fluorescent intensity

MT:

Metallothionein

R-SH:

Thiol

PTEN:

Phosphatase and tensin homolog

TGM2:

Transglutaminase 2

IRE1α:

Inositol-requiring enzyme 1alpha

GDF15:

Growth differentiation factor 15

EPHX2:

Epoxide hydrolases

TSLP:

Thymic stromal lymphopoietin

XRE:

Xenobiotic-responsive element

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Acknowledgements

We thank Dr. Michael Lynes (University of Connecticut Storrs) for his monoclonal antibody (UC1MT) to metallothionein.

Funding

The study was funded by a grant to DAL from NIEHS R01ES025584.

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Correspondence to David A. Lawrence.

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The authors declare no competing interests.

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Uddin, M.N., Mondal, T., Yao, Y. et al. Oxidative stress and neuroimmune proteins in a mouse model of autism. Cell Stress and Chaperones 28, 201–217 (2023). https://doi.org/10.1007/s12192-023-01331-2

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  • DOI: https://doi.org/10.1007/s12192-023-01331-2

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