Publications by authors named "Ayibaota Bahabayi"

Objective: This study aimed to investigate the role of CD55 in regulatory T cells (Tregs) and clarify its clinical relevance in rheumatoid arthritis (RA).

Methods: Flow cytometry was used to examine the expression of Helios and CTLA-4 in CD55 + and CD55- Tregs in mouse peripheral blood and spleen. FoxP3 mice were employed to analyze the in vitro inhibitory function of CD55 + and CD55-Tregs.

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Objective: This study seeks to elucidate the expression, function, and clinical relevance of the T cell receptor interacting molecule (TRIM) within circulating CD4+T cell subsets in systemic lupus erythematosus (SLE) patients.

Methods: We assessed TRIM expression across distinct subpopulations of human peripheral blood mononuclear cells (PBMCs) through the analysis of publicly available single-cell RNA sequencing data. In addition, TRIM expression was investigated within CD4+T cell subsets of peripheral blood and spleens in mice.

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LGALS9, also known as Galectin-9 and a member of the β-galactosidase family, plays a crucial role in immune regulation. However, its expression and function in CD8 T cells, as well as its association with cytotoxic T lymphocytes (CTL), remain unclear. This study aims to investigate LGALS9 expression patterns in human circulating CD8 T lymphocytes and elucidate its clinical significance in Systemic Lupus Erythematosus (SLE).

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  • - The study explores the role of VNN2 expression in monocytes and its importance in diagnosing primary Sjögren's syndrome (pSS).
  • - Researchers used single-cell RNA sequencing and flow cytometry to analyze VNN2 levels in different monocyte types, finding that VNN2 is less expressed in pSS patients compared to healthy individuals.
  • - Findings indicate that lower levels of VNN2 monocytes are linked with specific clinical indicators, suggesting VNN2 could serve as a useful diagnostic marker for pSS.
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Members of the vanin gene family include VNN1, VNN2, and VNN3 in humans. Although the functions of vanins have been widely examined in myeloid cells, their expression and functions have not been clarified in T lymphocytes. This study aimed to elucidate the significance of Vanin-2 (VNN2) on human peripheral blood T lymphocytes and study its expression in systemic lupus erythematosus (SLE).

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  • * The study investigates the role of GPR56, a G protein-coupled receptor, in B cells, revealing that its expression decreases in circulating B cell subsets of early-stage LUAD patients.
  • * The findings suggest that lower levels of GPR56 in B cells could indicate abnormal immune activity, making it a potential biomarker for the early diagnosis of LUAD.
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As one molecule related to cytotoxicity, surface expression of C-X3-C motif receptor 1 (CX3CR1) was highly correlated with intracellular granzyme B (GZMB) in natural killer and cytolytic T cells. However, the expression of CX3CR1 and GZMB in B cells has not been clarified, and their clinical significance in systemic lupus erythematosus (SLE) remains unclear. This study aimed to clarify the changes and clinical significance of peripheral blood B cells expressing GZMB and/or CX3CR1 in SLE.

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Objective: This study aimed to investigate the expression of GPR56 in the T cells of early-stage lung adenocarcinoma (LUAD) patients and clarify its diagnostic significance.

Methods: Blood samples were collected from 32 patients with stage IA LUAD and 31 healthy controls. GPR56 and perforin were analysed in circulating T-cell subsets by flow cytometry.

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This study aims to elucidate the expression and functionality of SIT1 in circulating CD8/CD4 + T cells in humans and to delineate its significance in systemic lupus erythematosus (SLE) patients. We employed multiparametric flow cytometry to investigate the expression of SIT1 in circulating CD8/CD4 + T cells and their respective subsets, comparing healthy controls (HCs) with SLE patients. Furthermore, we assessed the levels of granzyme B, perforin, IL-17, and IFN-γ in SIT1-related CD8/CD4 + T cells from both HCs and SLE patients, both before and after PMA stimulation.

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  • - The study investigated the role of KLRB1 (CD161) in CD4+ T cells and its importance in primary Sjögren's syndrome (pSS), using blood samples from healthy individuals and pSS patients for comparison.
  • - Results showed that KLRB1 expression increased significantly in activated CD4+ T cells, with higher levels of key markers and cytokines in KLRB1+ T cells from pSS patients compared to healthy controls.
  • - The findings suggest that KLRB1 could be a key player in the disease process of pSS and may serve as a useful additional diagnostic marker for the condition.
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Although the roles of E proteins and inhibitors of DNA-binding (Id) in T follicular helper (TFH) and T follicular regulatory (TFR) cells have been previously reported, direct models demonstrating the impact of multiple E protein members have been lacking. To suppress all E proteins including E2A, HEB and E2-2, we overexpressed Id1 in CD4 cells using a CD4-Id1 mouse model, to observe any changes in TFH and TFR cell differentiation. Our objective was to gain better understanding of the roles that E proteins and Id molecules play in the differentiation of TFH and TFR cells.

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Using data from single-cell RNA sequencing and flow cytometry, we initially examined the expression of FCRL3, finding it to be elevated and positively associated with TIGIT expression in the regulatory T cells of patients with systemic lupus erythematosus. This also suggests that the co-expression of FCRL3 and TIGIT warrants further attention.

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Helios was related to the immunosuppressive capacity and stability of regulatory T cells. However, the significance of Helios in follicular help T (TFH) and follicular regulatory T (TFR) cells is unclear. This research aimed to clarify the significance of Helios (IKZF2) in TFH and TFR cells and its clinical value in systemic lupus erythematosus (SLE).

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Objective: This study aimed to investigate the changes of follicular helper T (TFH) and follicular regulatory T (TFR) cell subpopulations in patients with non-small cell lung cancer (NSCLC) and their significance.

Methods: Peripheral blood was collected from 58 NSCLC patients at different stages and 38 healthy controls. Flow cytometry was used to detect TFH cell subpopulation based on programmed death 1 (PD-1) and inducible co-stimulator (ICOS), and TFR cell subpopulation based on cluster determinant 45RA (CD45RA) and forkhead box protein P3 (FoxP3).

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Objective: This study investigated CX3CR1 expression in human peripheral blood T lymphocytes and their subsets, exploring changes in SLE patients and its diagnostic potential.

Methods: Peripheral blood samples from 31 healthy controls and 50 SLE patients were collected. RNA-Seq data from SLE patient PBMCs were used to analyze CX3CR1 expression in T cells.

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Objective: This study aimed to investigate the changes and significance of circulating Helios-associated T cell subsets in patients with early-stage lung adenocarcinoma (LUAD).

Methods: Blood samples were collected from 35 healthy controls and 34 patients with early-stage LUAD. Flow cytometry was used to analyze various CD4+ T cell subsets, including regulatory T(Treg) cells, follicular regulatory T(Tfr) cells, follicular helper T (Tfh) cells, and conventional T (con-T) cells.

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  • The study aimed to analyze the expression of layilin (LAYN) in monocytes and lymphocytes of systemic lupus erythematosus (SLE) patients to determine its clinical significance.
  • Blood samples from 51 SLE patients and 50 healthy individuals were examined using flow cytometry, revealing higher LAYN levels in monocytes, particularly in specific subsets related to SLE.
  • The findings indicate that LAYN expression correlates with complement C4 levels in SLE patients, suggesting its potential role in the disease's pathogenesis and possible use as a diagnostic marker.
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Background: Matrix Metalloproteinases (MMPs) have been found to have important roles in vascular pathology and may be involved in the occurrence of pre-eclampsia. In this study, the serum levels of MMP-2, -7, -9 in normal pregnant women and pre-eclampsia patients were analyzed to assess their predictive value.

Methods: A total of 1563 pregnant women from Peking University Third Hospital, from February 2021 to October 2021, were enrolled.

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This study aimed to clarify the expression changes and clinical significance of regulatory T (Treg) cells and follicular regulatory T (TFR) cell subsets divided by glycoprotein A repetitions predominant protein (GARP) and T cell factor 1(TCF1) in peripheral blood of patients with chronic HBV infection. The peripheral blood of 26 chronic hepatitis B (CHB) patients, 27 inactive HBsAg carriers and 32 healthy controls were collected and GARP + percentages in Treg and TFR cells were analyzed by flow cytometry. In addition, Treg and TFR cell subsets sorted by CD62L and TCF1 were analyzed and compared.

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Objective: This study aimed to identify changes in T-cell factor-1 (TCF1) in circulating T-cell subsets of systemic lupus erythematosus (SLE) patients and to explore their significance in SLE.

Methods: Peripheral blood was collected from 41 SLE patients and 45 healthy controls (HCs). TCF1 in follicular helper T (TFH), follicular regulatory T (TFR) and regulatory T (Treg) cells was analyzed by flow cytometry.

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Objective: This study aims to elucidate the changes in the percentage of GPR56 and/or granzyme B (GZMB) positive cells in rheumatoid arthritis (RA) CD4 and CD8 T lymphocytes, and to explore their clinical value in diagnosing and reflecting the progression of RA.

Methods: The percentages of GPR56 and/or GZMB positive cells were analyzed in peripheral blood (PB) and spleen T cells in a collagen-induced arthritis (CIA) model established in DBA/1 mice. The percentages of GPR56+ and/or GZMB+ cells were further analyzed in PBs from RA patients and healthy controls.

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Objective: This study aimed to clarify the expression of HLA-DQ and granulysin in peripheral blood T-cell subsets in patients with chronic hepatitis B virus (CHB) and to evaluate their significance in assisting CHB diagnosis and immune status assessment.

Methods: Peripheral blood from 34 CHB patients, 36 inactive HBsAg carriers and 33 healthy controls were collected, and HLA-DQ and granulysin in a series of T-cell subsets were analysed by flow cytometry. The ability to secrete IL-10 and IFN-γ and the functional T-cell subsets were measured in Treg and CD4 cells expressing HLA-DQ or not.

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