Journal: Molecular Therapy Oncology

Article Title: Cross-regulation between FOXC1 and OCT4/SOX2 ensures acquisition of chemoresistance in breast cancer stem cells: Amendment by hsa-miR-5688

doi: 10.1016/j.omton.2025.200982

Figure Lengend Snippet: Figure 1. Inherently chemo-resistant CSCs acquire more resistance during chemotherapy (A) Representative flow-cytometric plots depicting the gating strategy for CD44+/CD24−CSC (P2) and CD44+/CD24+, CD44-/CD24-, CD44−CD24+ NSCC (P3) populations in MCF-7 cell (left panel). Bar diagrams depicting percentage of annexin-V-FITC+ apoptotic cells in MCF-7/MDA-MB-231/MDA-MB-468 cell-derived gated NSCC and CSC populations in the presence of 2.5-μM Dox after 24 h of treatment (right panel). (B) Bar diagrams illustrating relative mean fluorescence intensity (MFI) of drug-resistance markers ABCG2 (left panel), MDR1 (middle panel), and MRP1 (right panel) in cells vs. respective 20 spheres of MCF-7, MDA-MB-231, and MDA-MB-468, as analyzed by flow cytometry. (C) Bar diagrams showing relative MFI of stemness factors OCT4 (left panel), SOX2 (middle left panel), NANOG (middle right panel), and ABCG2 (right panel) as evaluated using flow cytometry in MCF-7, MDA-MB-231, and MDA-MB-468 CSCs in presence or absence of Dox, after 24 h of treatment. Data are mean ± SE or representative of three independent experiments unless otherwise noted. p = ns (non-significant), *p < 0.05, **p < 0.01, ***p < 0.001, and ****p < 0.0001 by unpaired Student’s t test.

Article Snippet: These two fractions of CD24− and CD24+ cells were next mixed with CD44 microbeads (Mitenyi Biotec) and again loaded onto the magnetic column and collection of different cell fractions finally led to the isolation of CD44+/CD24− as CSC subpopulation and CD44− /CD24− , CD44− /CD24+, and CD44+/CD24+ as NSCC subpopulation. cDNA synthesis, semiquantitative, and quantitative real-time

Techniques: Derivative Assay, Fluorescence, Flow Cytometry

Journal: Journal of molecular medicine (Berlin, Germany)

Article Title: Host and Pathogen Hyaluronan Signal Through Human Siglec-9 to Suppress Neutrophil Activation

doi: 10.1007/s00109-015-1341-8

Figure Lengend Snippet: Specific recognition of hyaluronan by the Ig-like-V-set domain of hSiglec-9. (a) Immobilized high molecular weight-hyaluronan (HMW-HA) was probed with human Siglec–Fc and CD44–Fc chimeras and binding evaluated by using an anti-human IgG-HRP. (b) Binding of hSiglec-9–Fc to immobilized HMW-HA was performed in the presence of increasing concentrations of HMW-HA, heparan sulfate, chondroitin sulfate or heparin. (c, d) To map the hSiglec-9 domain responsible for HA recognition, binding of hSiglec-9–Fc to immobilized HMW-HA was compared to binding of hSiglec-9–Fc with an Arg→Ala mutation in the V-set domain (hSiglec-9R120K), a fusion protein construct of the hSiglec-9 V-set domain + the second Ig-like domain (C2-set) of hSiglec-7 + human IgG Fc tail (hSiglec-9V-7C2–Fc), a fusion protein construct encompassing V-set domain of hSiglec-7 + C2-set of hSiglec-9 + human IgG Fc tail (Siglec-7V-9C2–Fc), a fusion protein construct of the hSiglec-9 V-set domain + first C2-set domain + human IgG Fc tail (Siglec-9–Fc 2D). Results are expressed as the mean ± SD. All experiments were performed in triplicate, repeated 3 times (a, d) or 2 times (b). One-way ANOVA with Dunnett’s multiple comparison test; P < 0.001 (***).

Article Snippet: Siglec-Fc proteins were purified from culture supernatant by adsorption to protein A-Sepharose (GE Healthcare); human CD44–Fc chimera was purchased from R&D Systems. hSiglecs-Fc and CD44–Fc were treated with 25 mU and 5 mU of Arthrobacter ureafaciens sialidase (AUS) for 60 min to remove Sias, prior to elution from the protein A-Sepharose.

Techniques: Molecular Weight, Binding Assay, Mutagenesis, Construct, Comparison

Journal: Journal of molecular medicine (Berlin, Germany)

Article Title: Host and Pathogen Hyaluronan Signal Through Human Siglec-9 to Suppress Neutrophil Activation

doi: 10.1007/s00109-015-1341-8

Figure Lengend Snippet: High molecular weight hyaluronan (HMW-HA) is recognized by hSiglec-9 on human neutrophils. (a) To evaluate the molecular size of hyaluronan (HA) responsible for binding to hSiglec-9, high molecular weigh HA (HMW-HA; >1,000 kDa), low molecular weigh (200 – 300 kDa-HA and 25 – 75 kDa-HA), nano-HA (nonamers) and oligo-HA (hexamers) fragments were added to compete with binding of hSiglec-9–Fc to immobilized HMW-HA plates. Binding was evaluated using an anti-human IgG-HRP. Experiment performed in triplicate and repeated 3 times; results are expressed as mean ± SD. (b) Flow cytometry reveals constitutive expression of Siglec-9 and CD44 on human neutrophils from 9 different donors; geometric mean ± 95% confidence interval. (c) Binding of FITC-labeled HMW-HA to neutrophils of these donors was evaluated by flow cytometry; geometric mean ± 95% confidence interval. (d) Human neutrophils were pretreated with anti-Siglec-9 monoclonal antibodies, anti-human CDw329 (BD Pharmingen, #550906) and anti-human Siglec-9 (R&D Systems, #BAF1139) and effects on binding to FITC-labeled HMW-HA determined. CDw329 Ab blocked binding of HMW-HA, but not GBS capsule (Fig. 5b) and was designated “α-Sig-9(HA)”; in contrast, the R&D Systems Ab blocked recognition of GBS capsule (Fig. 5b), but did not interfere with binding to HMW-HA, and was thus designated “α-Sig-9(Sia)”. Data pooled from five independent experiments in triplicate; data represent the mean ± SD. (e, f) Calcein-labeled human neutrophils were pretreated with α-Sig-9(HA), α-Sig-9(Sia) and α-CD44 mAbs, added to wells coated with immobilized HMW-HA to facilitate adherence, then unbound neutrophils washed away. Remaining neutrophils were lifted and enumerated. Experiment performed in triplicate and repeated 5 times; results are expressed as mean ± SD. One-way ANOVA with Dunnett’s multiple comparison test; P < 0.001 (***).

Article Snippet: Siglec-Fc proteins were purified from culture supernatant by adsorption to protein A-Sepharose (GE Healthcare); human CD44–Fc chimera was purchased from R&D Systems. hSiglecs-Fc and CD44–Fc were treated with 25 mU and 5 mU of Arthrobacter ureafaciens sialidase (AUS) for 60 min to remove Sias, prior to elution from the protein A-Sepharose.

Techniques: Molecular Weight, Binding Assay, Flow Cytometry, Expressing, Labeling, Comparison

Journal: Journal of molecular medicine (Berlin, Germany)

Article Title: Host and Pathogen Hyaluronan Signal Through Human Siglec-9 to Suppress Neutrophil Activation

doi: 10.1007/s00109-015-1341-8

Figure Lengend Snippet: Group A Streptococcus (GAS) engages hSiglec-9 via its surface hyaluronan capsule. (a) Human Siglec-9–Fc was immobilized to ELISA wells using protein A, and binding of FITC-labeled forms of WT GAS, its isogenic HA capsule-deficient mutant (ΔhasA), an animal-passaged hyperencapsulated (AP) derivative and its isogenic HA capsule-deficient mutant (AP ΔhasA) were evaluated; results are expressed as mean ± SD and repeated 5 times in triplicate with similar results; representative experiment shown. One-Way ANOVA with Dunnett’s multiple comparison test; P < 0.001 (***) (b) Human Siglec-9–Fc chimera was immobilized to ELISA wells via protein A in the presence of α-Sig-9(HA), α-Sig-9(Sia) or isotype control Abs and binding of FITC-labeled WT GAS or sialic acid-expressing serotype III group B Streptococcus (GBS) evaluated. (c) Human Siglec-9/9R120K/5/6/7/11 and human CD44-Fc chimera were immobilized to ELISA wells via protein A. Binding of FITC-labeled WT GAS was evaluated. Results represent mean ± SD; triplicate wells, representative experiment depicted of 5 independent repeats with similar results, performed in triplicate. (d) hSiglec-9–Fc was immobilized to ELISA plates using protein A, then wells were pretreated with HMW-HA, HMW-heparan sulfate or heparin over the indicated range of concentrations. Binding of FITC-labeled WT GAS was evaluated.

Article Snippet: Siglec-Fc proteins were purified from culture supernatant by adsorption to protein A-Sepharose (GE Healthcare); human CD44–Fc chimera was purchased from R&D Systems. hSiglecs-Fc and CD44–Fc were treated with 25 mU and 5 mU of Arthrobacter ureafaciens sialidase (AUS) for 60 min to remove Sias, prior to elution from the protein A-Sepharose.

Techniques: Enzyme-linked Immunosorbent Assay, Binding Assay, Labeling, Mutagenesis, Comparison, Expressing

Journal: Journal of molecular medicine (Berlin, Germany)

Article Title: Host and Pathogen Hyaluronan Signal Through Human Siglec-9 to Suppress Neutrophil Activation

doi: 10.1007/s00109-015-1341-8

Figure Lengend Snippet: HMW-HA binding to hSiglec-9 induces SHP-1 recruitment and blunts neutrophil NET production and oxidative burst. (a) 1.2 × 107 human neutrophils were incubated for 30 min + 10 µg/ml of high molecular weight hyaluronan (HMW-HA) + 25 nM PMA. Cell lysates were immunoprecipitated with α-Siglec9 and SHP-1 recruitment was visualized by western blot analysis; results were repeated 2 times with similar results; representative experiment with relative densitometry values is shown. (b) Neutrophils were pretreated with α-Sig-9(HA), α-Sig-9(Sia) or α-CD44 Abs, incubated with 10 µg/ml of HMW-HA and activated for 30 min with PMA. Reactive oxygen species (ROS) release was measured with the OxyBURST Green H2HFF BSA probe and results expressed as mean fluorescence intensity (MFI) ± SD; experiment repeated 5 times with similar results; representative experiment is shown. (c) Neutrophils were pretreated α-Sig-9(HA), α-Sig-9(Sia), or α-CD44 mAbs, then incubated with 10 µg/ml of HMW-HA and activated with PMA for 3 h; production of neutrophil extracellular traps (NETs) visualized by staining for DAPI (DNA, blue) + anti-myeloperoxidase/AlexaFluor488 (green); representative fields at 20x magnification is shown; experiment performed in triplicate and repeated 5 times. (d) NET production was quantified by Quant-iT™ PicoGreen® assay for extracellular DNA; results are expressed as mean ± SD; experiment repeated 3 times in triplicate with similar results; representative experiment shown. One-way ANOVA with Dunnett’s multiple comparison test; P < 0.001 (***).

Article Snippet: Siglec-Fc proteins were purified from culture supernatant by adsorption to protein A-Sepharose (GE Healthcare); human CD44–Fc chimera was purchased from R&D Systems. hSiglecs-Fc and CD44–Fc were treated with 25 mU and 5 mU of Arthrobacter ureafaciens sialidase (AUS) for 60 min to remove Sias, prior to elution from the protein A-Sepharose.

Techniques: Binding Assay, Incubation, Molecular Weight, Immunoprecipitation, Western Blot, Fluorescence, Staining, Picogreen Assay, Comparison

Journal: Journal of molecular medicine (Berlin, Germany)

Article Title: Host and Pathogen Hyaluronan Signal Through Human Siglec-9 to Suppress Neutrophil Activation

doi: 10.1007/s00109-015-1341-8

Figure Lengend Snippet: Group A Streptococcus (GAS) binding to hSiglec-9 via its surface HMW-HA capsule blunts neutrophil oxidative burst, NET responses and bactericidal activity. (a, b) Neutrophils were labeled with OxyBURST Green H2HFF BSA in the presence of α-Sig-9(HA), α-Sig-9(Sia) or α-CD44 mAbs, infected with WT or isogenic ΔhasA GAS at MOI = 20 for 30 min and oxidative burst measured by FACS; results are expressed as MFI ±SD and repeated twice with similar results; representative experiment is shown. (c) PMA-stimulated neutrophils (5 × 105 cells) were pretreated with α-Sig-9(HA), α-Sig-9(Sia), or α-CD44 mAbs and exposed for 3 h to MOI = 10 of GAS (DNase mutant) that had been pretreated or not with hyaluronidase to remove HA capsule and NET production visualized by staining for DAPI (DNA, blue) + anti-myeloperoxidase/AlexaFluor488 (green); results are repeated 5 times in triplicate, representative fields at 32 × magnification is shown. (d) NET production was quantified by Quant-iT™ PicoGreen® assay for extracellular DNA; results are expressed as mean ± SD and repeated 2 times with similar results; representative experiment shown. (e) Neutrophils were pretreated with α-Sig-9(HA), α-Sig-9(Sia) or α-CD44 mAbs, infected with WT or isogenic ΔhasA GAS at multiplicity of infection (MOI) = 10 for 30 min, then cells lysed and dilutions plated on agar for enumeration of colony forming units to evaluate neutrophil killing of GAS. Data represent the mean + SD of triplicates; repeated 4 times with similar results; representative experiment shown. One-Way ANOVA with Dunnett’s multiple comparison test; P < 0.001 (***) or P < 0.05 (*).

Article Snippet: Siglec-Fc proteins were purified from culture supernatant by adsorption to protein A-Sepharose (GE Healthcare); human CD44–Fc chimera was purchased from R&D Systems. hSiglecs-Fc and CD44–Fc were treated with 25 mU and 5 mU of Arthrobacter ureafaciens sialidase (AUS) for 60 min to remove Sias, prior to elution from the protein A-Sepharose.

Techniques: Binding Assay, Activity Assay, Labeling, Infection, Mutagenesis, Staining, Picogreen Assay, Comparison

Journal: International journal of molecular sciences

Article Title: Experimental Evaluation of Quantum Dots and Antibodies Conjugation by Surface Plasmon Resonance Spectroscopy.

doi: 10.3390/ijms232012626

Figure Lengend Snippet: Figure 4. Dependence of Au/CD44/anti-CD44 complex dissociation and surface regeneration efficiency on the nature of the regeneration solution.

Article Snippet: Recombinant human CD44 biomarker (career free, His tag C-Termus), monoclonal mouse IgG clone # 2C5 (anti-CD44) and recombinant human growth hormone from E. coli (hGH) were obtained from R&D Systems (Abingdon, UK).

Techniques:

Journal: Genes & Cancer

Article Title: CD133-positive cancer stem cells from Colo205 human colon adenocarcinoma cell line show resistance to chemotherapy and display a specific metabolomic profile

doi:

Figure Lengend Snippet: A-B. Cytometry analyses of Nestin, CK20, CD133, Oct3/4, CD44 and CD44v9 on 10% FBS Colo205 growing cells (control) and serum-free growing cultures (week 1 to week 5).

Article Snippet: The purity of sorted cells was evaluated by flow cytometry using FACSCalibur (BD Biosciences) after labeling with anti-human CD133/2 or CD44 antibody (Miltenyi Biotec).

Techniques: Cytometry, Control

Journal: Genes & Cancer

Article Title: CD133-positive cancer stem cells from Colo205 human colon adenocarcinoma cell line show resistance to chemotherapy and display a specific metabolomic profile

doi:

Figure Lengend Snippet: A. Tumorsphere evaluation of CD133+ and CD133- sorted cells. B. Invasiveness of different cell fractions measured using a collagen-based invasion kit (relative DO measured at 560 nm). C. Survival assay after chemotherapy treatment with cisplatin and 5-FU. D. Metabolite quantification after CE-TOF-MS experiments. Only metabolites of interest for Colo205 cells cultured in 10% FBS (control; green bar), CD133+ sorted cells (red bar) and CD44+ sorted cells (yellow bar) are reported here.

Article Snippet: The purity of sorted cells was evaluated by flow cytometry using FACSCalibur (BD Biosciences) after labeling with anti-human CD133/2 or CD44 antibody (Miltenyi Biotec).

Techniques: Clonogenic Cell Survival Assay, Cell Culture, Control

Journal: International journal of molecular medicine

Article Title: Autophagy is essential for the endothelial differentiation of breast cancer stem‑like cells.

doi: 10.3892/ijmm.2019.4399

Figure Lengend Snippet: Figure 1. Flow cytometry and microsphere culture of BCSLCs. (A) CD24‑/low cells were isolated from MCF‑7 using immunomagnetic beads, and the expres- sion of CD24 in MCF‑7 and isolated CD24‑/low cells were assessed using flow cytometry. (a) Isotype control for (b); (b) MCF‑7 cells; (c) isotype control for (d); (d) isolated CD24‑/low cells. (B) CD44+ cells were further isolated from CD24‑/low cells and the expression of CD44 was assessed using flow cytometry. (a) Isotype control for (b); (b) CD44+ cells. (C) Expression of CD24 and CD44 in MCF‑7, BCSLCs and BCSLCs after eight passages. (a) isotype control for (b); (b) MCF‑7 cells; (c) CSLCs; (d) isotype control for (e); (e) BCSLCs after eight passages. (D) The isolated BCCSLCs were cultured in microspheres for 0 and 64 h in stem cell culture medium. BCSLC, breast cancer stem‑like cell; PE, phycoerythrin.

Article Snippet: The following primary antibodies were used: Fluorescein isothiocyanate (FITc)-conjugated anti-human cd44 (cat. no. 130-113-903; Miltenyi Biotec GmbH), phycoerythrin (PE)-conjugated anti-human cd24 (cat. no. 130-098-861; Miltenyi Biotec GmbH) PE-conjugated anti-human cd31 (cat. no. 130-110-807; Miltenyi Biotec GmbH) and FITc-conjugated anti-human cd105 (cat. no. 130-098-778; Miltenyi Biotec GmbH).

Techniques: Flow Cytometry, Isolation, Control, Expressing, Cell Culture, Stem Cell Culture

Journal: Iranian Journal of Basic Medical Sciences

Article Title: Effect of TGF-β1 transfected dental pulp derived mesenchymal stem cells on ın vivo cartilage regeneration

doi: 10.22038/ijbms.2025.87715.18946

Figure Lengend Snippet: Flow cytometry findings showed that rabbit DP-MSCs positively expressed CD29 in 94% and CD44 in 99%

Article Snippet: The cells treated with CD29, CD44 (Bio-Rad Lab., Inc., #MCA2504, USA), and CD45 (Bio-Rad Lab., Inc., #MCA808GA, USA) primer antibodies were centrifuged after incubation, and Goat anti-Mouse secondary antibody (Abcam, #ab7064, UK) was added.

Techniques: Flow Cytometry