biotinylated aleuria aurantia lectin  (Vector Laboratories)

Journal: bioRxiv

Article Title: Differential TIM-3 glycosylation enables specific dual targeting CAR-T therapy in acute myeloid leukemia

doi: 10.64898/2026.04.22.719217

Figure Lengend Snippet: (A) TIM-3 expression on KASUMI-3 cells, primary AML blasts, and healthy immune subsets (CIK cells, monocytes, NK cells) assessed by flow cytometry using QuantiBRITE beads. REH (ALL cell line) served as negative control. (B) Short-term killing assay of TIM-3.CAR-CIK cells against CIK (n = 11) or KASUMI-3 (n = 8) cells compared with NT cells. Target cell lysis was evaluated by flow cytometry (E:T 5:1). (C) Short-term killing assay of TIM-3.CAR-CIK cells against monocytes (n = 8) or NK cells (n = 8) compared with NT (E:T 5:1). KASUMI-3 (n = 4) were included as positive control. (D) Immunoblot analysis of TIM-3 in lysates from monocytes, CIK cells, and KASUMI-3 cells following enzymatic treatment with PNGase F or broad neuraminidase, probed with a commercial anti–TIM-3 antibody (TIM-3-cmAb). GAPDH, loading control. Glycan symbols follow SNFG. (E) TIM-3 immunoprecipitates from monocytes, CIK cells, and KASUMI-3 cells treated with PNGase F or O- glycosidase and analyzed by immunoblot with TIM-3-cmAb and lectin far-western with Aleuria aurantia lectin (AAL; fucosylated epitopes). TGX stain-free total protein signal is shown as a loading/normalization control. (F) KASUMI-3 cells treated with vehicle (mock) or the fucosylation inhibitor 2F-peracetyl-fucose (SGN-2FF), followed by PNGase F or neuraminidase treatment and immunoblot/lectin probing with TIM-3-cmAb and AAL. See also Figure S3A . (G) Short-term killing assay of TIM-3.CAR-CIK cells against untreated or SGN-2FF-treated KASUMI-3 cells at various E:T ratios (5:1, 1:1, 0.5:1, 0.25:1 and 0.125:1, n = 8). (H) Affinity kinetics (left) and binding avidity at 1000 pN force (right) of TIM-3.CAR-CIK cells to untreated or defucosylated KASUMI-3 by LUMICKS analysis (n = 6). Immunoblot experiments (D-F) were repeated in three independent biological replicates with similar results. Data are presented as individual values and mean ± SD. Statistical significance was determined with repeated-measures two-way ANOVA with Bonferroni’s post hoc test (B, C) or using paired t test (G, H). ns, not significant; *p = 0.01, **p < 0.001, ***p = 0.0001 and ****p < 0.0001. Illustrations were created with Biorender.com. See also Figure S3 for loading-matched TIM-3 immunoprecipitation controls.

Article Snippet: Membranes were probed with anti-human TIM-3 antibody (TIM-3-cmAb) (1:250; R&D Systems, MAB23652), a recombinant monoclonal antibody derived from the TIM-3.CAR scFv (TIM-3 scFv-mAb) (1:500; GENEWIZ), biotinylated Aleuria aurantia lectin (AAL; 1:3000; Vector Laboratories, B-1395-1), and biotinylated Ricinus communis agglutinin I (RCA I; 1:3000; Vector Laboratories, B-1085-1).

Techniques: Expressing, Flow Cytometry, Negative Control, Lysis, Positive Control, Western Blot, Control, Glycoproteomics, Staining, Binding Assay, Immunoprecipitation

Journal: bioRxiv

Article Title: Differential TIM-3 glycosylation enables specific dual targeting CAR-T therapy in acute myeloid leukemia

doi: 10.64898/2026.04.22.719217

Figure Lengend Snippet: (A) Immunoblot profiling of TIM-3 glycoforms in monocytes, CIK cells, and KASUMI-3 lysates using a recombinant scFv-derived monoclonal antibody (TIM-3scFv-mAb) following enzymatic treatment with PNGase F or broad neuraminidase. GAPDH, loading control. (B) TIM-3 immunoprecipitates from healthy monocytes, KASUMI-3 cells, and primary AML blasts treated with neuraminidase and/or PNGase F and analyzed by lectin and antibody probing: Ricinus communis agglutinin I (RCA-I; terminal β-galactose/LacNAc motifs), CA19-9 (sialyl-Lewis A), CSLEX1 (sialyl-Lewis X), and TIM-3scFv-mAb. See also Figure S3B . (C) High-resolution immunoblot of TIM-3 species detected by TIM-3scFv-mAb in CIK cells, primary AML blasts, and KASUMI-3 cells. GAPDH, loading control. See also Figure S3C . (D) RT-qPCR expression profiling of glycosyltransferases (FUT7, FUT8, ST3GAL3, ST3GAL4, ST3GAL6) in monocytes, KASUMI-3 cells, and primary AML blasts. Data are plotted as fold-change relative to monocytes and normalized to 18S RNA; individual points denote biological samples where applicable. (E) Schematic model summarizing a glycoform-biased recognition framework in which AML-associated remodeling of TIM-3 N -glycans contributes to preferential TIM-3.CAR recognition of AML-enriched TIM-3 glycoforms. Representative N -glycan structures are proposed for TIM-3 in AML blasts, monocytes and CIK cells based on enzymatic perturbation and lectin/antibody probing. Sugar moieties drawn with dashed outlines indicate features not directly resolved/assigned. Glycan symbols follow SNFG. Immunoblot and lectin/antibody blot experiments (A-C) were repeated in three independent biological replicates with similar results. Illustrations were created with Biorender.com. See also Figure S3 for additional lectin/antibody probing of TIM-3 glycoforms and terminal galactose exposure.

Article Snippet: Membranes were probed with anti-human TIM-3 antibody (TIM-3-cmAb) (1:250; R&D Systems, MAB23652), a recombinant monoclonal antibody derived from the TIM-3.CAR scFv (TIM-3 scFv-mAb) (1:500; GENEWIZ), biotinylated Aleuria aurantia lectin (AAL; 1:3000; Vector Laboratories, B-1395-1), and biotinylated Ricinus communis agglutinin I (RCA I; 1:3000; Vector Laboratories, B-1085-1).

Techniques: Western Blot, Recombinant, Derivative Assay, Control, Quantitative RT-PCR, Expressing, Glycoproteomics

Journal: International Journal of Medical Sciences

Article Title: POFUT2 Mediated Fucosylation of JUP Enhances VEGFA Expression to Promote Angiogenesis in Colorectal Cancer

doi: 10.7150/ijms.113515

Figure Lengend Snippet: POFUT2 mediated fucosylation of JUP to enhance VEGFA expression. (A) Detection of JUP fucosylation by Western Blot after POFUT2 overexpression in HCT8 cells, using an exogenous Flag antibody to pull down POFUT2, followed by lectin AAL blotting. (B) Detection of JUP expression level after POFUT2 overexpression in HCT8 cells with a 24-hour treatment of SGN-2FF (10μm). (C) Scatterplot illustrating the expression correlation between JUP and VEGFA within the TCGA CRC cohort. (D) qRT-PCR detection of VEGFA expression following JUP knockdown in HCT8 cells. (E) Western blot analysis of VEGFA protein expression levels after transfection with JUP siRNA in HCT8 cells. (F-H) Western blot analysis of VEGFA protein expression levels after transfection with POFUT2 overexpression plasmid and POFUT2 siRNA in HCT8 cells. Data are presented as mean ± standard deviation and were analyzed using T-test statistical analysis, with n = 3, **P < 0.01, ***P < 0.001, ns: not significant (P > 0.05).

Article Snippet: The antibodies used in this study were as follows: POFUT2 (ABclonal, A12223), JUP (ABclonal, A0963), VEGFA (ABclonal, A21647; Proteintech, 19003-1-AP), GAPDH (Proteintech, 10494-1-AP), Flag (ABclonal, AE092), and AAL lectin (Vector Labs, B-1395-1).

Techniques: Expressing, Western Blot, Over Expression, Quantitative RT-PCR, Knockdown, Transfection, Plasmid Preparation, Standard Deviation