MicroRNA-155 is a critical regulator of regulatory T cells in OM-85 Broncho-Vaxom treated experimental models of allergic rhinitis

Xi Luo; Hehong Li; Rongshan Chen; Yinhui Zeng; Wenlong Liu; Qingxiang Zeng; Xi Luo; Hehong Li; Rongshan Chen; Yinhui Zeng; Wenlong Liu; Qingxiang Zeng

doi:10.3934/Allergy.2024002

AIMS Allergy and Immunology

2024, Volume 8, Issue 1: 8-17. doi: 10.3934/Allergy.2024002

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Research article

MicroRNA-155 is a critical regulator of regulatory T cells in OM-85 Broncho-Vaxom treated experimental models of allergic rhinitis

1.
Department of Otolaryngology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangdong Provincial Clinical Research Center for Child Health, Guangzhou, 510623, China
2.
Department of Medical Imaging, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangdong Provincial Clinical Research Center for Child Health, Guangzhou, 510623, China
3.
Department of Respiratory Medicine, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangdong Provincial Clinical Research Center for Child Health, Guangzhou, 510623, China
† These three authors contributed equally.

Received: 05 November 2023 Revised: 31 December 2024 Accepted: 12 January 2024 Published: 24 January 2024

Background

Bacterial lysates could alleviate the clinical symptoms of allergic rhinitis (AR) and decrease the recurrent rate of AR through regulation of regulatory T cell (Treg) cells. However, the molecular regulatory mechanisms of bacterial lysates to Treg are still unclear.

Objective

We aimed to investigate the importance of microRNA-155 (miR-155) to Treg cells function in OM-85 Broncho-Vaxom (OM-85 BV) treated experimental mouse models of AR.

Methods

AR mouse models were established and treated by intranasal administration of OM-85 BV to investigate the role of bacteria lysate for Treg cell function. The proliferation of Treg cells in peripheral blood was examined. The mRNA levels of IL-10, transforming growth factor-β (TGF-β) were examined by real-time PCR. miR-155 mimics and inhibitor were used to verify the role of miR-155 for Treg cells function.

Results

OM-85 BV, miR-155 mimics or their combination reduced total cells, lymphocytes, neutrophils and eosinophils in nasal lavage fluid of AR mouse models and improved allergic symptoms. OM-85 BV promoted the proliferation of Treg and the expression of Foxp3, IL-10 and TGF-β both in vivo and in vitro. The miR-155 enhanced the proliferation and function of Treg.

Conclusions

MiR-155 promotes Treg cells function in OM-85 BV bacteria lysate treated experimental models of AR and alleviate the upper airway allergic inflammation in AR mice.

Keywords:

Citation: Xi Luo, Hehong Li, Rongshan Chen, Yinhui Zeng, Wenlong Liu, Qingxiang Zeng. MicroRNA-155 is a critical regulator of regulatory T cells in OM-85 Broncho-Vaxom treated experimental models of allergic rhinitis[J]. AIMS Allergy and Immunology, 2024, 8(1): 8-17. doi: 10.3934/Allergy.2024002

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Abstract

Background

Objective

We aimed to investigate the importance of microRNA-155 (miR-155) to Treg cells function in OM-85 Broncho-Vaxom (OM-85 BV) treated experimental mouse models of AR.

Methods

Results

Conclusions

MiR-155 promotes Treg cells function in OM-85 BV bacteria lysate treated experimental models of AR and alleviate the upper airway allergic inflammation in AR mice.

Acknowledgments

This study was supported by grants from the Science and Technology Program of Guangzhou (No.202201011844, No. 202201020600), Scientific Research Capacity Improvement Project of Guangzhou Medical University (02-410-2302151XM).

Conflict of interest

All authors declare no conflicts of interest in this paper.

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