cell nuclear antigen  (Proteintech)

Journal: Neural Regeneration Research

Article Title: Small extracellular vesicles derived from hair follicle neural crest stem cells enhance perineurial cell proliferation and migration via the TGF-β/SMAD/HAS2 pathway

doi: 10.4103/NRR.NRR-D-25-00127

Figure Lengend Snippet: hfNCSC-sEVs are taken up by PCs in vitro and enhance their proliferation and migration. (A) Primary cultures of hfNCSCs were established from male Sprague–Dawley rats. (B) Immunofluorescence staining of the neural crest cell marker p75 (red) and the stem cell marker nestin (green) in hfNCSCs, with 4′,6-diamidino-2-phenylindole (DAPI) staining indicating the nuclei. (C) Western blot analysis demonstrated the presence of surface markers (cluster of differentiation [CD]9, CD81, and tumor susceptibility gene 101 protein [TSG101]) and the absence of an endoplasmic reticulum marker (calnexin) in hfNCSC-sEVs. (D) Nanoparticle tracking analysis was used to quantify the concentration and size distribution of hfNCSC-sEVs. (E) Transmission electron microscopy was used to visualize the characteristic morphology of hfNCSC-sEVs. (F) Immunofluorescence staining indicated that the third-generation PCs cultured in vitro were positive for claudin-1, zonula occludens 1 (ZO1), and glucose transporter 1 (GLUT1) but negative for S100, with DAPI staining marking the nuclei. (G) The internalization of PKH26-labeled hfNCSC-sEVs (red) by ZO1-positive PCs (green) was visualized using immunofluorescence staining, with DAPI staining to mark the nuclei. (H) The Cell Counting Kit-8 assay was used to evaluate the cell viability of PCs across concentrations of 0, 2 × 10 8 , 5 × 10 8 , and 10 × 10 8 particles/mL hfNCSC-sEVs at 3, 5, and 7 days of in vitro culture ( n = 5 per group). (I) The Transwell assay was used to quantify the number of migrating PCs at 6, 12, and 18 hours post-treatment with the aforementioned concentrations of hfNCSC-sEVs, in in vitro culture ( n = 6 per group). (J) Western blot and (K) statistical analyses revealed the relative protein expression levels of proliferating cell nuclear antigen (PCNA) and vimentin in PCs from the phosphate-buffered saline (PBS) and hfNCSC-sEVs groups on day 5 of in vitro culture (normalized to β-actin, n = 3 per group). Data are expressed as the mean ± SEM. * P < 0.05, ** P < 0.01, *** P < 0.001 (one-way analysis of variance and Tukey’s multiple comparison test for H and I; Student’s t -test for K). The data were from at least three separate and independent studies. CCK-8: Cell counting kit-8; GLUT1: glucose transporter 1; hfNCSCs: hair follicle neural crest stem cells; ns: not significant; PCNA: proliferating cell nuclear antigen; PCs: perineurial cells; sEVs: small extracellular vesicles; ZO1: zonula occludens 1.

Article Snippet: The following primary antibodies were used: rabbit monoclonal anti-proliferating cell nuclear antigen (PCNA) antibody (1:2000, Cat# 60097-1-Ig, Proteintech, Wuhan, China), rabbit monoclonal anti-vimentin antibody (1:1000, Cat# 5741, Cell Signaling Technology, Danvers, MA, USA), rabbit polyclonal anti-claudin-1 antibody (1:1000, Cat# 13050-1-AP, Proteintech), rabbit polyclonal anti-zonula occludens 1 (ZO1) antibody (1:10 000, Cat# 21773-1-AP, Proteintech), rabbit polyclonal anti-mothers against decapentaplegic homolog (SMAD)7 antibody (1:500, Cat# WL02975, Wanleibio, Shenyang, China), rabbit polyclonal anti-SMAD2/3 antibody (1:1000, Cat# WL01520, Wanleibio), rabbit polyclonal anti-p-SMAD2/3 antibody (1:500, Cat# WL02305, Wanleibio), rabbit recombinant anti-hyaluronan synthase 2 (HAS2) antibody (1:500, Cat# DF13702, Affinity, Cincinnati, OH, USA), rabbit monoclonal anti-β-actin antibody (1:1000, Cat# 4970, Cell Signaling Technology), and mouse monoclonal anti-β-tubulin antibody (1:5000, Cat# M20005 , Abmart, Shanghai, China).

Techniques: In Vitro, Migration, Immunofluorescence, Staining, Marker, Western Blot, Concentration Assay, Transmission Assay, Electron Microscopy, Cell Culture, Labeling, Cell Counting, Transwell Assay, Expressing, Saline, Comparison, CCK-8 Assay

Journal: Neural Regeneration Research

Article Title: Small extracellular vesicles derived from hair follicle neural crest stem cells enhance perineurial cell proliferation and migration via the TGF-β/SMAD/HAS2 pathway

doi: 10.4103/NRR.NRR-D-25-00127

Figure Lengend Snippet: miR-21-5p in hfNCSC-sEVs augments cell proliferation and migration by enhancing HAS2 expression in PCs. (A, B) Western blot (A) and statistical analyses (B) revealed the relative protein expression levels of HAS2, proliferating cell nuclear antigen (PCNA), and vimentin in PCs across the –/–, –/si- Has2 , hfNCSC-sEVs/–, and hfNCSC-sEVs/si- Has2 groups on day 5 of in vitro culture (normalized to β-actin, n = 3 per group). (C, D) The wound healing assay (C) and statistical analysis (D) demonstrated the migration rates of PCs in the aforementioned groups ( n = 3 per group). (E) The Cell Counting Kit-8 assay was used to assess cell viability in PCs across the same groups on day 5 of in vitro culture ( n = 5 per group). (F, G) Western blot (F) and statistical analyses (G) indicated the relative protein expression levels of HAS2, PCNA, and vimentin in PCs treated with phosphate-buffered saline (PBS), hfNCSC-sEVs, or hfNCSC-sEVs + miR-21-5p inhibitor on day 5 of in vitro culture (normalized to β-actin, n = 3 per group). (H–J) Immunofluorescence staining visualized the expression of HAS2 (red) and 5-ethynyl-2′-deoxyuridine (EdU; green) in PCs (H), and statistical analysis revealed the integrated optical density (IOD) of zonula occludens 1 (ZO1; I) and the cell proliferation rates (J) in the PBS, hfNCSC-sEVs, and hfNCSC-sEVs + miR-21-5p inhibitor groups on day 5 of in vitro culture ( n = 3 per group). (K, L) Western blot (K) and statistical analyses (L) showed the relative protein expression levels of HAS2, PCNA, and vimentin in regenerated tissue from the PBS, hfNCSC-sEVs, and hfNCSC-sEVs + miR-21-5p inhibitor groups on day 5 post-operation (normalized to β-tubulin, n = 3 per group). Data are expressed as the mean ± SEM. ** P < 0.01, *** P < 0.001 (one-way analysis of variance and Tukey’s multiple comparison test for B, D, E, G, I, J, and L). The data were from at least three separate and independent studies. CCK-8: Cell counting kit-8; EdU: 5-ethynyl-2′-deoxyuridine; HAS2: hyaluronan synthase 2; hfNCSCs: hair follicle neural crest stem cells; IOD: integrated optical density; PCNA: proliferating cell nuclear antigen; PCs: perineurial cells; sEVs: small extracellular vesicles; ZO1: zonula occludens 1.

Article Snippet: The following primary antibodies were used: rabbit monoclonal anti-proliferating cell nuclear antigen (PCNA) antibody (1:2000, Cat# 60097-1-Ig, Proteintech, Wuhan, China), rabbit monoclonal anti-vimentin antibody (1:1000, Cat# 5741, Cell Signaling Technology, Danvers, MA, USA), rabbit polyclonal anti-claudin-1 antibody (1:1000, Cat# 13050-1-AP, Proteintech), rabbit polyclonal anti-zonula occludens 1 (ZO1) antibody (1:10 000, Cat# 21773-1-AP, Proteintech), rabbit polyclonal anti-mothers against decapentaplegic homolog (SMAD)7 antibody (1:500, Cat# WL02975, Wanleibio, Shenyang, China), rabbit polyclonal anti-SMAD2/3 antibody (1:1000, Cat# WL01520, Wanleibio), rabbit polyclonal anti-p-SMAD2/3 antibody (1:500, Cat# WL02305, Wanleibio), rabbit recombinant anti-hyaluronan synthase 2 (HAS2) antibody (1:500, Cat# DF13702, Affinity, Cincinnati, OH, USA), rabbit monoclonal anti-β-actin antibody (1:1000, Cat# 4970, Cell Signaling Technology), and mouse monoclonal anti-β-tubulin antibody (1:5000, Cat# M20005 , Abmart, Shanghai, China).

Techniques: Migration, Expressing, Western Blot, In Vitro, Wound Healing Assay, Cell Counting, Saline, Immunofluorescence, Staining, Comparison, CCK-8 Assay

Journal: bioRxiv

Article Title: Proximity proteomics reveals a role for IFI16 during human coronavirus infection

doi: 10.64898/2026.04.22.720112

Figure Lengend Snippet: IFI16 promotes coronavirus infection. ( a) CRISPR-Cas9 technology was used to knock out IFI16 in A549 cells and single cell clones were screened for loss of IFI16 expression using qRT-PCR. Data is representative of two independent experiments. ( b) Immunoblot showing the loss of IFI16 expression in IFI16-KO cell line. ( c) Immunofluorescence assay showing reduced number of HCoV-OC43 N-positive cells upon loss of IFI16. Cells were infected at an MOI of 0.1 and incubated for the indicated length of time before fixation and staining for HCoV-OC43 N protein. Scale bar is 10 um. ( d ) Representative flow cytometry analysis of wildtype (WT) A549 cells and IFI16-KO cells infected (in quadruplicate) with HCoV-OC43 at an MOI of 0.01 and 0.1 for 12, 24 and 48 h. Data is representative of 3 independent experiments. (e) and (f) Quantification of flow cytometry data in . ( g) Representative flow cytometry analysis of CRISPRi cell lines infected (in quadruplicate) with HCoV-OC43 at an MOI of 0.01 for 12, 24 and 48 h. data in figure. (h) Quantification of flow cytometry data in . Data is representative of two independent experiments. Statistical significance was assessed by ANOVA. * P ≤ 0.05, ** P ≤ 0.01, *** P ≤ 0.001, and **** P ≤ 0.0001.

Article Snippet: Cells were washed twice with a permeabilization/wash buffer (0.1% saponin and 0.5% BSA in 1X PBS) and stained with a 1:10000 dilution of anti-HCoV-OC43-N rabbit polyclonal antibody (catalogue no. 40643-T62; Sino Biological) for 30 min at 4°C.

Techniques: Infection, CRISPR, Knock-Out, Single Cell, Clone Assay, Expressing, Quantitative RT-PCR, Western Blot, Immunofluorescence, Incubation, Staining, Flow Cytometry