Journal: The Journal of Biological Chemistry

Article Title: RNA-binding protein tristetraprolin inhibits Th2 cell activation and differentiation in allergic rhinitis by promoting TRIM18 mRNA decay

doi: 10.1016/j.jbc.2026.111240

Figure Lengend Snippet: TTP suppressed T helper 2 (Th2)-type inflammation in AR mice. A , schematics of splenocytes isolation from AR-mice and the differentiation of splenic naive CD4+ T cells model in vitro . B , the levels of Interleukin (IL)-4, IL-5, and IL-13, which belong to the Th2 cytokine family, were measured by ELISA assays in the cell supernatant. The cell supernatant was collected from mononuclear cells of the spleen that had been treated with ionomycin and phorbol 12-myristate 13-acetate (PMA) for 6 h. C , after treatment with ionomycin, PMA, and GolgiPlug, the cells with the double stain of anti-CD4 and anti-IL-4-APC were detected by flow cytometry to analyze the percentage of Th2 cells. Data are shown as means ± SD (N = 3 or 6). One-way analysis of variance (ANOVA) was used for statistical analysis of control mice, AR mice, and AR mice transduced with control vectors or TTP overexpression vectors.

Article Snippet: For flow cytometry, the primary splenocytes were stimulated with 50 ng/ml PMA (Shanghai Yuanye Bio-Technology, Cat No. R32414 ), 1 μg/ml ionomycin (Macklin, Cat No.I838446), and 1 μl/ml BD Golgi Plug for 6 h. Centrifugal collection of cells was resuspended in 100 μl of staining buffer, and surface markers were stained with 5 μl anti-mouse CD4 (RM4-5; Liankebio, Cat No.F21004A02) and 5 μl APC anti-mouse IL-4 (Elabsciencem, Cat No.E-AB-F1204E) for 30 min. After centrifugation, the samples were analyzed using a Flow Cytometer.

Techniques: Isolation, In Vitro, Enzyme-linked Immunosorbent Assay, Staining, Flow Cytometry, Control, Transduction, Over Expression

Journal: The Journal of Biological Chemistry

Article Title: RNA-binding protein tristetraprolin inhibits Th2 cell activation and differentiation in allergic rhinitis by promoting TRIM18 mRNA decay

doi: 10.1016/j.jbc.2026.111240

Figure Lengend Snippet: TTP knockdown exacerbated allergic phenotypes and promoted Th2-type inflammation in AR mice. A , experimental scheme of RW-induced AR mice with or without TTP knockdown via intravenous injection of lentiviral vectors (Lv-shNC or Lv-shTTP). B , expression of TTP mRNA in AR mice with or without TTP knockdown. C , immunofluorescence staining for TTP protein ( red ) and CD4 protein ( green ) in normal and RW-exposed nasal tissues. DAPI ( blue ) was used for nuclear staining (Scale bar = 50 μm). D , quantitative analysis of TTP fluorescence intensity in nasal mucosal tissues from lentivirus-injected mice. E , hematoxylin-eosin (H&E)-stained nasal mucosal tissue sections, showing nasal mucosa thickness (Scale bar = 100 μm). Dashed lines indicate the boundary between the epithelial layer and lamina propria. F and G , changes in the number of sneezes and nasal rubbings after TTP knockdown in AR mice. H , schematic of splenocyte isolation from AR mice and in vitro treatment. I – K , Levels of IL-4, IL-5, and IL-13 in the cell culture supernatant of splenocytes treated with ionomycin and PMA for 6 h. Data are presented as means ± SD (N = 3 or 6). Student's t test was used for statistical analysis of AR mice transduced with shNC or shTTP.

Article Snippet: For flow cytometry, the primary splenocytes were stimulated with 50 ng/ml PMA (Shanghai Yuanye Bio-Technology, Cat No. R32414 ), 1 μg/ml ionomycin (Macklin, Cat No.I838446), and 1 μl/ml BD Golgi Plug for 6 h. Centrifugal collection of cells was resuspended in 100 μl of staining buffer, and surface markers were stained with 5 μl anti-mouse CD4 (RM4-5; Liankebio, Cat No.F21004A02) and 5 μl APC anti-mouse IL-4 (Elabsciencem, Cat No.E-AB-F1204E) for 30 min. After centrifugation, the samples were analyzed using a Flow Cytometer.

Techniques: Knockdown, Injection, Expressing, Immunofluorescence, Staining, Fluorescence, Isolation, In Vitro, Cell Culture, Transduction

Journal: The Journal of Biological Chemistry

Article Title: RNA-binding protein tristetraprolin inhibits Th2 cell activation and differentiation in allergic rhinitis by promoting TRIM18 mRNA decay

doi: 10.1016/j.jbc.2026.111240

Figure Lengend Snippet: The TTP protein acted as a negative regulator of TRIM18-mediated Th2-type inflammation by reducing TRIM18 mRNA stability. A , protein–protein interaction network of 16 potential substrates of E3 ubiquitin ligase TRIM18, constructed using the STRING database and supplemented with functional annotations via GO (Gene Ontology) pathway enrichment analyses, highlighting key biological processes and signaling pathways associated with these substrates. B and C , the qRT-PCR and ELISA were performed to detect the mRNA level and secreted protein concentration of IL-5, respectively, in naive CD4+ T cells or in vitro differentiated Th2 cells transfected with TRIM18 overexpression vector or empty vector. D , schematic diagram of the experimental workflow: Naive CD4+ T cells were induced to differentiate into Th2 cells under in vitro and were co-transfected with combinations of TTP overexpression vector, TRIM18 overexpression vector, or corresponding empty vectors. E , the mRNA level of TRIM18 in differentiated Th2 cells from the three groups (Control, TTP-OE, TTP+TRIM18-OE) was detected by qRT-PCR assays. F and G , The mRNA level and secreted protein concentration of IL-5 were measured by qRT-PCR and ELISA, respectively, in differentiated Th2 cells from the three groups (Control, TTP-OE, TTP+TRIM18-OE). H , flow cytometric analysis of the percentage of CD4+IL-4+ Th2 cells among the three groups after in vitro differentiation, and the proportion of double-positive cells was quantified to assess the impact of TTP and/or TRIM18 overexpression on Th2 cell differentiation. Data are shown as means ± SD (N = 3), One-way ANOVA was used for statistical analysis.

Article Snippet: For flow cytometry, the primary splenocytes were stimulated with 50 ng/ml PMA (Shanghai Yuanye Bio-Technology, Cat No. R32414 ), 1 μg/ml ionomycin (Macklin, Cat No.I838446), and 1 μl/ml BD Golgi Plug for 6 h. Centrifugal collection of cells was resuspended in 100 μl of staining buffer, and surface markers were stained with 5 μl anti-mouse CD4 (RM4-5; Liankebio, Cat No.F21004A02) and 5 μl APC anti-mouse IL-4 (Elabsciencem, Cat No.E-AB-F1204E) for 30 min. After centrifugation, the samples were analyzed using a Flow Cytometer.

Techniques: Ubiquitin Proteomics, Construct, Functional Assay, Protein-Protein interactions, Quantitative RT-PCR, Enzyme-linked Immunosorbent Assay, Protein Concentration, In Vitro, Transfection, Over Expression, Plasmid Preparation, Control, Cell Differentiation

Journal: Frontiers in Immunology

Article Title: Targeting Glutamine Metabolism Ameliorates Autoimmune Hepatitis via Inhibiting T Cell Activation and Differentiation

doi: 10.3389/fimmu.2022.880262

Figure Lengend Snippet: JHU083 inhibited T cells differentiation in vivo . Mice of Vehicle-AIH and JHU083-AIH group were intravenously injected with 8ml/kg ConA, and Vehicle-WT group was injected with normal saline of equal volume. JHU083-AIH group was gavaged with 0.3mg/kg JHU083 24h and 1h before ConA injection, and Vehicle-WT and Vehicle-AIH group were treated with equal vehicle at the same time points. (A) Flow cytometry was applied to analyze the Th1 cell percentage via IFNγ expression, the Th2 cell percentage via IL4 expression, and the Th17 cell percentage via IL17A expression. (B) ELISA was applied to analyze serum IFNγ (Th1 cells) and IL17 (Th17 cells) secretions. Flow cytometry was also applied to analyze the differentiation of CD8(+) T cells into cytotoxic T lymphocytes, evidenced by secreting IFNγ (C) and Granzyme (D) . Data were expressed as means ± SEM. * P < 0.05, ** P <0.01, and *** P <0.001. ns, not significant.

Article Snippet: The antibodies used in the flow cytometry were as follows: CD4 (FITC, E-AB-F1097C), CD8a (PE, E-AB-F1104D), CD25 (PE-Cy5, E-AB-F1102G), CD69 (PE-Cy7, E-AB-F1187H), IL4 (PE, E-AB-F1204UD), IL17A (APC, E-AB-F1272E) were purchased from Elabscience Biotechnology (Wuhan, China), antibodies IFNγ (APC-Cy7, cat# 561479) was purchased from BD Biosciences (UK), and Granzyme B (PE-Cy7, cat# 372213) was purchased from Biolegend (San Diego, CA, USA).

Techniques: In Vivo, Injection, Saline, Flow Cytometry, Expressing, Enzyme-linked Immunosorbent Assay

Journal: Frontiers in Immunology

Article Title: Targeting Glutamine Metabolism Ameliorates Autoimmune Hepatitis via Inhibiting T Cell Activation and Differentiation

doi: 10.3389/fimmu.2022.880262

Figure Lengend Snippet: DON treatment suppressed T cells differentiation in vitro . Freshly separated spleen cells were stimulated with 1.5mg/ml ConA with or without treating 2.5μM DON, and cells were analyzed 24h after ConA stimulation. (A) The differentiation markers of CD4+ T cells (IFNγ for Th1 cells, IL4 for Th2 cells and IL17 for Th17 cells) were detected using flowcytometry. (B) qRT-PCR was applied to analyze IFN-γ, IL4 and IL17 mRNA levels. (C) ELISA was applied to analyze supernatant IFN-γ and IL17 secretions. Flow cytometry was also applied to detect the production of activation markers of CTL, such as IFNγ (D) and Granzyme B (E) . Data were expressed as means ± SEM. ** P <0.01 and *** P <0.001, ns, not significant.

Article Snippet: The antibodies used in the flow cytometry were as follows: CD4 (FITC, E-AB-F1097C), CD8a (PE, E-AB-F1104D), CD25 (PE-Cy5, E-AB-F1102G), CD69 (PE-Cy7, E-AB-F1187H), IL4 (PE, E-AB-F1204UD), IL17A (APC, E-AB-F1272E) were purchased from Elabscience Biotechnology (Wuhan, China), antibodies IFNγ (APC-Cy7, cat# 561479) was purchased from BD Biosciences (UK), and Granzyme B (PE-Cy7, cat# 372213) was purchased from Biolegend (San Diego, CA, USA).

Techniques: In Vitro, Quantitative RT-PCR, Enzyme-linked Immunosorbent Assay, Flow Cytometry, Activation Assay