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Erschienen in: BMC Pediatrics 1/2024

Open Access 01.12.2024 | Research

The response of CD27+CD38+ plasmablasts, CD24hiCD38hi transitional B cells, CXCR5ICOS+PD-1+ Tph, Tph2 and Tfh2 subtypes to allergens in children with allergic asthma

verfasst von: Yunying Zhu, Qian Jiang, Chenshuang Lei, Qinhua Yu, Liannv Qiu

Erschienen in: BMC Pediatrics | Ausgabe 1/2024

Abstract

Background

Allergic asthma is a type I allergic reaction mediated by serum Immunoglobulin E (IgE). B cell-mediated humoral immune response to allergens in the pathophysiology of allergic asthma have not been thoroughly elucidated. Peripheral helper T cells (Tph) and follicular helper T cells (Tfh) promote B cell differentiation and antibody production in inflamed tissues.

Objective

To investigate the roles of B cell subsets, Tph cell subsets and Tfh cell subsets in allergic immune responses.

Methods

Circulating B cell subsets, Tph cell subsets and Tfh cell subsets in 33 children with allergic asthma and 17 healthy children were analyzed using multicolor flow cytometry. The level of serum total IgE was also assessed.

Results

Our study found that CD27+CD38+ plasmablasts and CD24hiCD38hi transitional B cells increased and were correlated with serum total IgE level, CD27 naive B cells and CD24hiCD27+ B cells decreased in children with allergic asthma. CXCR5 Tph, CXCR5ICOS+ Tph, CXCR5ICOS+PD-1+ Tph, CXCR5+ICOS+ Tfh and CXCR5+ICOS+PD-1+ Tfh increased in children with allergic asthma. Further analysis showed increased Tph2, Tph17, Tfh2 and Tfh17 subtypes while decreased Tph1 and Tfh1 subtypes in children with allergic asthma. Most interestingly, Tph2 or Tfh2 subtypes had a positive correlation with serum total IgE level.

Conclusion

Overall, these results provide insight into the allergens elicited B, Tph or Tfh cell response and identify heretofore unappreciated CD24hiCD38hi transitional B cells, CD24hiCD27+ B cells, CXCR5 Tph, CXCR5ICOS+PD-1+ Tph, Tph2 subtypes and Tfh2 subtypes response to allergens.
Hinweise

Supplementary Information

The online version contains supplementary material available at https://​doi.​org/​10.​1186/​s12887-024-04622-4.
Yunying Zhu and Qian Jiang contributed equally to this work.

Publisher’s Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Introduction

Hypersensitivity immune responses to allergens and other environmental factors, including helper T cell cytokine responses and the production of mmunoglobulin E (IgE) antibodies, are key immunologic features of allergic diseases [1]. Memory B cells, plasmablasts and antibody-producing cells arise during adaptive humoral immune responses in germinal center (GC) [24]. Regulatory CD24hiCD27+ B cells and CD24hiCD38hi transitional B cells have been identified to down-regulate allergic and auto-immune inflammation, suppress pro-inflammatory Th1/Th17 responses and induce regulatory T cells (Tregs) by producing IL-10 and/or TGF-β [57]. Sumimoto K et al. [8] found that circulating CD24hiCD27+ B cells decreased while CD24hiCD38hi B cells increased in patients with type I autoimmune pancreatitis. However, circulating CD24hiCD27+ B cells and CD24hiCD38hi B cells decreased and functionally impaired in psoriatic arthritis and systemic sclerosis [9, 10]. Van der Vlugt LE et al. [11] found that CD24hiCD27+ B cells from patients with allergic asthma have impaired regulatory function in response to lipopolysaccharide. Investigations have also revealed that the IgE level can be regulated by regulatory B cells by producing IL-10 [12]. However, the fundamental question of whether B cell response and IgE antibody production are regulated by the same immunological pathway in allergic asthma is still a matter of debate.
T follicular helper (Tfh) cells are distinguished from other CD4+ T cells by their selective role in orchestrating GC responses and in promoting the development of memory B cells and long-lived plasma cells. Previous studies demonstrated that Tfh cells orchestrated systemic IgE production in patients with allergic asthma [11, 13]. Yao Y et al. [14] also found a positive correction between Tfh2 subtypes and IgE in patients with allergic asthma. Achour A et al. [15] found human regulatory B cells control Tfh cell development and maturation, and further suppress the antibody secretion. However, understanding the role of Tfh cells in the regulation of IgE antibodies in allergic immune responses to allergens remains limited.
Recently, T peripheral helper (Tph) cells were found in the peripheral blood to possess B cell help functions like Tfh cells [16, 17]. Tph cells possess phenotypic characteristics similar to Tfh cells, such as inducible T-cell costimulator (ICOS), programmed cell death 1-positive (PD-1), the cytokines interleukin (IL)-21, chemokine (C-X-C motif) ligand 13, thus having the ability to regulate B-cell differentiation [18]. However, Tph cells are distinguished from Tfh cells by their lacking the expression of chemokine C-X-C receptor (CXCR) 5. Interestingly, CXCR5 Tph cells have hitherto been divided into three subtypes based on differential expression of CXCR3 and C–C receptor 6 (CCR6): CXCR3+CCR6 Tph1, CXCR3CCR6 Tph2, and CXCR3CCR6+ Tph17 [19]. Recently, studies found increased peripheral blood circulation Tph cells in patients with IgG4-related disease (IgG4-RD) [20, 21], rheumatoid arthritis (RA) [18, 22], systemic lupus erythematosus (SLE) [23, 24] and Sjögren's Syndrome (SS) [25]. Further, Tph cells in patients with IgG4-RD contribute to B cell reaction and plasma cell formation [21, 26, 27]. Moreover, the increased circulating Tph cells is positively related to the disease activity of SLE [23, 24, 28]. However, whether circulating Tph cell subsets contributes to the regulation of IgE antibodies in allergic immune responses deserves further investigation.
Accordingly, to better understand the contribution of B cell subsets, Tph cell subsets and Tfh cell subsets to the production of IgE antibodies in response to allergens and to elucidate their roles in allergic immune responses, we analyze circulating B cell subsets, Tph cell subsets and Tfh cell subsets in children with allergic asthma using multicolor flow cytometry in the current study. Our observations suggest that CD24hiCD38hi transitional B cells, CD24hiCD27+ B cells, CXCR5 Tph, CXCR5ICOS+PD-1+ Tph, Tph2 subtypes and Tfh2 subtypes could play a key role in the regulation of IgE antibody production. Our observations suggest CD24hiCD38hi transitional B cells, CD24hiCD27B cells, CXCR5ICOS+PD-1+ Tph and Tph2 subtypes indreased in children with allergic asthma. Hence, allergic immune responses might be mediated by CD24hiCD38hi transitional B cells, CD24hiCD27B cells, CXCR5ICOS+PD-1+ Tph and Tph2 subtypes.

Materials and methods

Subjects

In the current study, a total of 33 children with allergic asthma were recruited and met diagnostic criteria of “Guidelines for diagnosis, prevention and treatment of bronchial asthma in children” formulated by Chinese Medical Association. No children had a history of allergen-specific immunotherapy. Treatment with antihistamines and corticosteroids was stopped at least 4 weeks before children entered the study. Seventeen sex- and age-matched healthy children (HC) without allergic or respiratory diseases or experienced asthma-like syndromes were recruited for the present study (Table 1). EDTA-K2 anticoagulated peripheral blood were collected from all participants and were detected within 24 h of admission. Level of specific IgE to allergens and serum total IgE level was assessed using IMMAGE 800 specific protein analyzer (Beckman Coulter, USA). Written informed consents were obtained from parents of study participants. The experimental protocol followed the guidelines of the Declaration of Helsinki and was approved by the Human Ethics Committee of Zhejiang Provincial People’s Hospital.
Table 1
Clinicopathologic characteristics of the study participants
 
Asthma (n = 33)
Control (n = 17)
P
Sex/(female,n)
13/33
5/17
 
Age (years)
6.27 ± 3.22
8.03 ± 2.98
0.0530
Eos (%)
3.52 ± 3.06
2.03 ± 1.17
0.0430
Eos (/μL)
0.79 ± 2.92
0.17 ± 0.08
0.3550
SPT (> 5 mm)
-
-
-
 Milk
20/33
-
-
 Egg proteins
3/33
-
-
 Cat
20/33
-
-
 Dog
12/33
-
-
 Cashew nut
4/33
-
-
 Tree
11/33
-
-
 House mite dust
25/33
-
-
 Crab and shrimp
12/33
-
-
Total IgE (IU/mL)
251.9 ± 366.97
8.62 ± 3.10
0.0064
Specific IgE (IU/mL)
-
-
-
 Milk (n = 20)
7.31 ± 22.02
-
-
 Protein (n = 3)
66.84 ± 57.44
-
-
 Cat (n = 20)
23.04 ± 39.66
-
-
 Dog (n = 12)
2.65 ± 2.94
-
-
 Cashew nut (n = 4)
2.93 ± 1.56
-
-
 Tree (n = 11)
23.70 ± 38.36
-
-
 House mite dust (n = 25)
34.04 ± 36.31
-
-
 Crab and shrimp (n = 12)
21.02 ± 37.53
-
-

Flow cytometry analysis

Peripheral blood mononuclear cells (PBMCs) were isolated from subjects by density-gradient centrifugation. Human PBMCs (106 cells/tube) were stained with following surface markers (Table 2). Fluorescence minus one (FMOs) were used for proper gate setting for all markers (Figure S1). After cells were incubated with these surface antibodies for 30 min at 4 °C in the dark, they were washed with Phosphate Buffered Saline (PBS) and then analyzed by BD FACSCantoTMflow cytometer (BD Biosciences, USA). Data were processed using BD FACSDivaTMsoftware (BD Biosciences, USA).
Table 2
Flow antibody information
Target
Fluorchrome
Company
Clone
CD19
FITC
BD Biosciences
J4.119
CD24
PerCP-Cy5.5
BD Biosciences
ML5
CD27
PE
BD Biosciences
L128
CD38
APC
BD Biosciences
HB-7
CD3
PE
BD Biosciences
SK7
CD4
PC7
BD Biosciences
13B8.2
CXCR5
Alexa Fluor®488
BD Biosciences
RF8B2
ICOS
APC
BD Biosciences
ISA-3
PD-1
PerCP-Cy5.5
BD Biosciences
EH12.1
CXCR3
APC
BD Biosciences
Clone IC6
CCR6
PerCP-cy5.5
BD Biosciences
Clone 11A9
The B cell subsets were identified based on CD24, CD27 and CD38 after cells were gated on CD19+ B cells (Figure S2). Differential Tph and Tfh cell subsets were identified based on CXCR5, ICOS and PD-1 expression after cells were gated on CD3+CD4+ T cells. Tph or Tfh subtypes were determined according to CXCR3 and CCR6 expression after cells were gated on CXCR5 Tph or CXCR5+ Tfh (Figure S3).

Statistical analysis

Statistical analysis was performed with GraphPad Prism 5.01 software. The data are expressed by mean ± standard deviation. Statistical tests for data analysis included one-way ANOVA test and Spearman’s r correlation. P value < 0.05 were considered to be statistically significant.

Results

Increased CD27+CD38+ plasmablasts and CD24hiCD38hi transitional B cells while decreased CD24hiCD27+ B cells in children with allergic asthma

CD27+CD38+ plasmablasts and memory B cells are terminally differentiated B cells that arise during adaptive humoral immune responses. The frequency of CD19+ B cells (Fig. 1A, B), CD27+ memory B cells (Fig. 1C, E), CD24hiCD27 B cells (Fig. 1G, I), CD24+CD27 B cells (Fig. 1H, I), CD24hiCD38hi transitional B cells (Fig. 1J, M), CD24intCD38int B cells (Fig. 1K, M), CD27+CD38+ plasmablasts (Fig. 1N, Q) and CD27CD38 B cells (Fig. 1P, Q) were significantly increased while the frequency of CD27 naïve B cells (Fig. 1D, E), CD24hiCD27+ B cells (Fig. 1F, I), CD24hiCD38 B cells (Fig. 1L, M) and CD27+CD38 B cells (Fig. 1O, Q) were significantly decreased in children with allergic asthma. Our data further suggest that B cell responses in children with allergic asthma were different compared to HC, which may be induced by allergens or other factors.

Expansion of CXCR5 Tph, CXCR5ICOS+ Tph, CXCR5ICOS+PD-1+ Tph, CXCR5+ICOS+ Tfh and CXCR+ICOS+PD-1+ Tfh cells and skewing to Tph2, Tph17, Tfh2 and Tfh17 subtypes in patients with allergic asthma

Since CD4+ T cells promotes B cells differentiation and antibody production in inflamed tissues, we further investigated different Tph and Tfh cell subsets. We first investigated the frequency of circulating Tph and Tfh from 33 children with allergic asthma, 26 of whom were followed up for Tph and Tfh subtypes. First, we found a higher frequency of CXCR5 Tph (Fig. 2A, C), CXCR5ICOS+ Tph (Fig. 2D, F) and CXCR5ICOS+PD-1+ Tph (Fig. 2G, J) in children with allergic asthma. Then, we further analyzed three Tph subtypes and found a lower frequency of Tph1 subtypes while a higher frequency of Tph2 and Tph17 subtypes in children with allergic asthma than those of HC (Fig. 2K-N).
Similarly, we also found a lower frequency of CXCR5+ Tfh (Fig. 2B, C) while a higher frequency of CXCR5+ICOS+ Tfh (Fig. 2E, F) and CXCR+ICOS+PD-1+ Tfh (Fig. 2I, J) in children with allergic asthma. We then further analyzed three Tfh subtypes and found a lower frequency of Tfh1 subtypes while a higher frequency of Tfh2 and Tfh17 subtypes in children with allergic asthma than those of HC (Fig. 2O-R). In all, our findings indicate that skewed polarization of Tph2, Tph17, Tfh2 and Tfh17 subtypes may be a factor in the exaggerating immune response of allergic asthma.

Serum total IgE level positively correlate with CD27+CD38+ plasmablasts, CD24hiCD38hi transitional B cells, CXCR5 Tph, CXCR5ICOS+PD-1+ Tph, Tph2 and Tfh2 subtypes in children with allergic asthma

To further explore the potential contribution to dysregulated B cell subsets, Tph or Tfh subsets in the development of allergic asthma, we analyzed correlation between frequency of B cell subsets, Tph or Tfh subsets and serum total IgE level. As expected, the frequency of CD27+CD38+ plasmablasts, CD24hiCD38hi transitional B cells, CXCR5 Tph, CXCR5ICOS+PD-1+ Tph, Tph2 subtypes and Tfh2 subtypes were weak positively correlated with serum total IgE level in children with allergic asthma (Fig. 3A-F). However, no correlation was found between other B cell subsets, Tph or Tfh subsets and serum total IgE level (Figure S4).

Discussion

Allergic asthma is IgE-mediated type I hypersensitivity reaction to allergens [29]. Efforts are being made to understand the dysregulation of IgE production in patients with allergic asthma. In the current study, we analyzed changes in circulating B cell subsets, Tfh cell subsets, and Tph cell subsets in children with allergic asthma. A novel concept derived from our study was IgE antibody production was closely related to CD27+CD38+ plasmablasts, CD24hiCD38hi transitional B cells, CXCR5 Tph, CXCR5ICOS+PD-1+ Tph, Tph2 subtypes and Tfh2 subtypes. In the current study, we sought to obtain a better understanding of B cell response in children with allergic asthma.
CD27 is a recognized surface marker of memory B cells [30]. We found increased CD19+ B cells, CD27+ memory B cells and CD27+CD38+ plasmablasts while decreased CD27 naïve B cells in children with allergic asthma. Moreover, we found a weak positive correlation between CD27+CD38+ plasmablasts and serum total IgE level. These results demonstrated that the allergen induced B cell activation and a high plasmablasts response, consistent with previous studies [4, 31, 32]. Currently, Flores-Borja Fet al. [33] and Noble A et al. [34] reported that CD24hiCD38hi B cells in asthmatic mice induced CD4+CD25 T effector cells transform into Tregs, so as to inhibit allergic airway inflammation. Our observations, for the first time, demonstrated that increased CD24hiCD38hi transitional B cells in children with allergic asthma were weakly positively correlated with serum total IgE level, indicating that CD24hiCD38hi transitional B cells may emerged after exposure to allergens.
We also found significantly decreased CD24hiCD27+ B cells in children with allergic asthma, consistent with previous study [1, 2, 4, 6, 11]. Therefore, together with our findings, indicate that CD27+CD38+ plasmablasts and CD24hiCD38hi transitional B cells could play an important role in IgE antibody production.
Tph cells hardly express CXCR5 [24, 35], and can promote B cell differentiation and the production of autoantibodies [28, 36, 37]. Previous studies have shown that Tph cells regulate B cell response and plasma cell differentiation in rheumatoid arthritis [18]. Ekman I et al. found increased circulating Tph cells in children with newly diagnosed type I diabetes, which has the potential to further become a biomarker of disease progress, and monitor the effect of immunotherapy [38]. Recent study have shown that Tph cells are associated with serum IgG level and may be a biomarker for monitoring disease activity [26]. In the current study, we observed increased frequency of CXCR5 Tph, CXCR5ICOS+ Tph, CXCR5ICOS+PD-1+ Tph, Tph2 and Tph17 subtypes in children  with allergic asthma. Most interestingly, CXCR5 Tph, CXCR5ICOS+PD-1+ Tph and Tph2 subtypes were weakly positively correlated with serum total IgE level, suggesting that CXCR5 Tph, CXCR5ICOS+PD-1+ Tph and Tph2 subtypes may play an important role in the excessive accumulation of serum total IgE in allergic asthma.
Previous reports have demonstated that a skewed distribution of circulating Tfh2 subtypes contributes to the pathogenesis of inflammatory airway diseases such as allergic rhinitis and asthma, and that Tfh2 subtypes promote the polarization of IgE production in patients with allergic asthma [14, 3943]. We found a lower frequency of CXCR5+ Tfh or Tfh1 subtypes and a higher frequency of CXCR5+ICOS+ Tfh, CXCR+ICOS+PD-1+ Tfh, Tfh2 or Tfh17 subtypes in children with allergic asthma. Our data also showed that Tfh2 subtypes were positively correlated with serum total IgE level in children with allergic asthma. Achour A et al. [15] found that humans regulate B cells to control Tfh maturation and inhibit Tfh cell-mediated antibody secretion. Thus, decreased CD24hiCD27+ B cells could bring about excessive Tfh cell-dependent humoral responses and might lead to aberrant immune responses.
In summary, it has become clear that the increased CD24hiCD38hi transitional B cell, CXCR5ICOS+PD-1+ Tph, Tph2 and Tfh2 subtypes may contribute to the development of aberrant immune responses in children with allergic asthma. Although this study was conducted in a small number of subjects, a deeper understanding of human Tph or Tfh and B cell subsets interrelations is worthy of pursuit to elaborate new therapeutic strategies in allergic asthma. Further research is required to elucidate the role of various B cell subsets, Tph and Tfh in allergic asthma.

Acknowledgements

Not applicable.

Declarations

Written informed consents were obtained from parents of study participants. The experimental protocol followed the guidelines of the Declaration of Helsinki and was approved by the Human Ethics Committee of Zhejiang Provincial People’s Hospital.
Not applicable.

Competing interests

The authors declare no competing interests.
Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://​creativecommons.​org/​licenses/​by/​4.​0/​. The Creative Commons Public Domain Dedication waiver (http://​creativecommons.​org/​publicdomain/​zero/​1.​0/​) applies to the data made available in this article, unless otherwise stated in a credit line to the data.

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Literatur
33.
Zurück zum Zitat Flores-Borja F, et al. CD19+CD24hiCD38hi B cells maintain regulatory T cells while limiting TH1 and TH17 differentiation. Sci Transl Med. 2013;5(173):173ra23.CrossRefPubMed Flores-Borja F, et al. CD19+CD24hiCD38hi B cells maintain regulatory T cells while limiting TH1 and TH17 differentiation. Sci Transl Med. 2013;5(173):173ra23.CrossRefPubMed
34.
Zurück zum Zitat Noble A, Zhao J. Follicular helper T cells are responsible for IgE responses to Der p 1 following house dust mite sensitization in mice. Clin Exp Allergy. 2016;46(8):1075–1082. Noble A, Zhao J. Follicular helper T cells are responsible for IgE responses to Der p 1 following house dust mite sensitization in mice. Clin Exp Allergy. 2016;46(8):1075–1082.
Metadaten
Titel
The response of CD27+CD38+ plasmablasts, CD24hiCD38hi transitional B cells, CXCR5−ICOS+PD-1+ Tph, Tph2 and Tfh2 subtypes to allergens in children with allergic asthma
verfasst von
Yunying Zhu
Qian Jiang
Chenshuang Lei
Qinhua Yu
Liannv Qiu
Publikationsdatum
01.12.2024
Verlag
BioMed Central
Erschienen in
BMC Pediatrics / Ausgabe 1/2024
Elektronische ISSN: 1471-2431
DOI
https://doi.org/10.1186/s12887-024-04622-4

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