Journal: Bioactive Materials

Article Title: Geometry-driven immunomodulation in 3D-printed bioceramics: Negative curvature promotes macrophage M2 polarization via Ras-MAPK/HIF-1α signaling for vascularized osteogenesis

doi: 10.1016/j.bioactmat.2026.01.001

Figure Lengend Snippet: (A–C) Cell adhesion, relative fluorescence intensity of CCR7/CD206 and ROS for Raw264.7 on different Gaussian curvatures. (D) CCR7 & CD206 staining of Raw264.7 cells (blue-nucleus, red-CCR7, green-CD206, scale:100 μm). (E, F) F-actin & DAPI staining and statistical scatterplot of hBMSC adhesion. (G) ALP intensity of hBMSCs on different Gaussian curvatures. (H, I) Cell adhesion and CD31 fluorescence intensity of HUVECs. (J) Chord diagram for comprehensive normalized data of Raw264.7, hBMSCs and HUVECs behavior detection with different Gaussian curvatures on HCGC chips.

Article Snippet: The reagents used in the experiment included: H-DMEM(11965118, Gibco, USA.), α-DMEM medium(12571063, Gibco, USA.), TritonX-100(ST1723, Beyotime, China), 4 % paraformaldehyde (BL539A, Biosharp, China),FBS(A5256701, Gibco, USA.),ECM medium (Science Cell, USA.),and DAPI staining solution (C1006, Beyotime, China),BCIP/NBT(C3206, Beyotime, China), reactive oxygen species kit (S0033S, Beyotime, China), BSA (B2064, ≥98 %, Sigma-Aldrich, USA.),CD31 antibody (ab28364, Abcam, USA.), secondary anti-IGg (ab175773, Alexa Fluor® 680, Abcam, USA.), Phalloidin-iFluor 488(ab176753, Abcam, USA.), CCR7(AF5293, Bioss, China), CD206 (bsm-60761R, Bioss, China), iNOS (bs-22924R, Bioss, China), RIPA (P0013, Beyotime, China), p-ERK1/2 (AF3687, Affinity, USA.) and ERK1/2 (#AF0155, Affinity, USA), luminol detection reagent (sc-2048, Santa Cruz, USA.), GAPDH (Cat#KC-5G5, Kangchen Biotechnology, China), Trizol(15596026CN, Invitrogen, USA.), DEPC(R0601, Thermo Scientific, USA.), TBST(R017R.0000, Thermo Scientific, USA.), HIF-1a(GTX127309, GeneTex, USA.), β-Tubulin(10094-1-AP, Proteintech, UK) Adezmapimod (SB 203580, MCE, USA.) medium and Paclitaxel (99.88 %, HY-B0015R, MCE), ELISA Arg-1(E-EL-M3092, ELabSci@, China), TNF-α (E-EL-M3063, ELabSci@, China), OPN(22952-1-AP, Proteintech, UK.), F4/80 (GB11027-100, Servicebio, China) Alkaline phosphatase activity kit (P0321S, Beyotime, China), Matrigel (CLS356234, Corning, USA), Microfill MV120 (Flow tech, USA), EDTA(17892, Thermo Scientific, USA.) xylene(X112051, AR,99 %, Aladdin, China), ethanol (107-21-1, AR,99 %, Aladdin, China).

Techniques: Fluorescence, Staining

Journal: Bioactive Materials

Article Title: Geometry-driven immunomodulation in 3D-printed bioceramics: Negative curvature promotes macrophage M2 polarization via Ras-MAPK/HIF-1α signaling for vascularized osteogenesis

doi: 10.1016/j.bioactmat.2026.01.001

Figure Lengend Snippet: Macrophage polarization analysis of Raw264.7 on structures with different gaussian curvature: (A, B) Chord Diagram for qPCR analysis of CCR7, IL6, iNOS-inflammatory and M1 marker genes, and Arg-1, CD206, IL10-M2 related protein genes in different Gaussian curvature groups. (C) Protein content of Arg-1 in different Gaussian curvature groups at 1 and 3 days. (D) Integral plots of the five experimental groups. IL4 group is the positive control for CD206 expression and lipopolysaccharide (LPS) group is the negative control.

Article Snippet: The reagents used in the experiment included: H-DMEM(11965118, Gibco, USA.), α-DMEM medium(12571063, Gibco, USA.), TritonX-100(ST1723, Beyotime, China), 4 % paraformaldehyde (BL539A, Biosharp, China),FBS(A5256701, Gibco, USA.),ECM medium (Science Cell, USA.),and DAPI staining solution (C1006, Beyotime, China),BCIP/NBT(C3206, Beyotime, China), reactive oxygen species kit (S0033S, Beyotime, China), BSA (B2064, ≥98 %, Sigma-Aldrich, USA.),CD31 antibody (ab28364, Abcam, USA.), secondary anti-IGg (ab175773, Alexa Fluor® 680, Abcam, USA.), Phalloidin-iFluor 488(ab176753, Abcam, USA.), CCR7(AF5293, Bioss, China), CD206 (bsm-60761R, Bioss, China), iNOS (bs-22924R, Bioss, China), RIPA (P0013, Beyotime, China), p-ERK1/2 (AF3687, Affinity, USA.) and ERK1/2 (#AF0155, Affinity, USA), luminol detection reagent (sc-2048, Santa Cruz, USA.), GAPDH (Cat#KC-5G5, Kangchen Biotechnology, China), Trizol(15596026CN, Invitrogen, USA.), DEPC(R0601, Thermo Scientific, USA.), TBST(R017R.0000, Thermo Scientific, USA.), HIF-1a(GTX127309, GeneTex, USA.), β-Tubulin(10094-1-AP, Proteintech, UK) Adezmapimod (SB 203580, MCE, USA.) medium and Paclitaxel (99.88 %, HY-B0015R, MCE), ELISA Arg-1(E-EL-M3092, ELabSci@, China), TNF-α (E-EL-M3063, ELabSci@, China), OPN(22952-1-AP, Proteintech, UK.), F4/80 (GB11027-100, Servicebio, China) Alkaline phosphatase activity kit (P0321S, Beyotime, China), Matrigel (CLS356234, Corning, USA), Microfill MV120 (Flow tech, USA), EDTA(17892, Thermo Scientific, USA.) xylene(X112051, AR,99 %, Aladdin, China), ethanol (107-21-1, AR,99 %, Aladdin, China).

Techniques: Marker, Positive Control, Expressing, Negative Control

Journal: Bioactive Materials

Article Title: Geometry-driven immunomodulation in 3D-printed bioceramics: Negative curvature promotes macrophage M2 polarization via Ras-MAPK/HIF-1α signaling for vascularized osteogenesis

doi: 10.1016/j.bioactmat.2026.01.001

Figure Lengend Snippet: (A) Immunofluorescence images of β-Tubulin /CD206 and β-Tubulin /HIF-1α of macrophages in different Gaussian curvature groups before and after treatment with Adezmapimod . (B, C) Protein quantification and Western blotting image of ERK1/2, p-ERK1/2, β-tubulin, HIF-1α and CD206 proteins in all groups before and after treatment with Adezmapimod and Paclitaxel. (D) Mechanism summary of Gaussian curvature-driven macrophage polarization.

Article Snippet: The reagents used in the experiment included: H-DMEM(11965118, Gibco, USA.), α-DMEM medium(12571063, Gibco, USA.), TritonX-100(ST1723, Beyotime, China), 4 % paraformaldehyde (BL539A, Biosharp, China),FBS(A5256701, Gibco, USA.),ECM medium (Science Cell, USA.),and DAPI staining solution (C1006, Beyotime, China),BCIP/NBT(C3206, Beyotime, China), reactive oxygen species kit (S0033S, Beyotime, China), BSA (B2064, ≥98 %, Sigma-Aldrich, USA.),CD31 antibody (ab28364, Abcam, USA.), secondary anti-IGg (ab175773, Alexa Fluor® 680, Abcam, USA.), Phalloidin-iFluor 488(ab176753, Abcam, USA.), CCR7(AF5293, Bioss, China), CD206 (bsm-60761R, Bioss, China), iNOS (bs-22924R, Bioss, China), RIPA (P0013, Beyotime, China), p-ERK1/2 (AF3687, Affinity, USA.) and ERK1/2 (#AF0155, Affinity, USA), luminol detection reagent (sc-2048, Santa Cruz, USA.), GAPDH (Cat#KC-5G5, Kangchen Biotechnology, China), Trizol(15596026CN, Invitrogen, USA.), DEPC(R0601, Thermo Scientific, USA.), TBST(R017R.0000, Thermo Scientific, USA.), HIF-1a(GTX127309, GeneTex, USA.), β-Tubulin(10094-1-AP, Proteintech, UK) Adezmapimod (SB 203580, MCE, USA.) medium and Paclitaxel (99.88 %, HY-B0015R, MCE), ELISA Arg-1(E-EL-M3092, ELabSci@, China), TNF-α (E-EL-M3063, ELabSci@, China), OPN(22952-1-AP, Proteintech, UK.), F4/80 (GB11027-100, Servicebio, China) Alkaline phosphatase activity kit (P0321S, Beyotime, China), Matrigel (CLS356234, Corning, USA), Microfill MV120 (Flow tech, USA), EDTA(17892, Thermo Scientific, USA.) xylene(X112051, AR,99 %, Aladdin, China), ethanol (107-21-1, AR,99 %, Aladdin, China).

Techniques: Immunofluorescence, Western Blot

Journal: Bioactive Materials

Article Title: Geometry-driven immunomodulation in 3D-printed bioceramics: Negative curvature promotes macrophage M2 polarization via Ras-MAPK/HIF-1α signaling for vascularized osteogenesis

doi: 10.1016/j.bioactmat.2026.01.001

Figure Lengend Snippet: Immune-related analysis of macrophages in scaffolds with various Gaussian curvature after muscle bag implantation: (A, B) Immunohistochemical sections and statistical analysis of IL10 positive cells. (C, D) Immunofluorescence staining images and statistical analysis of CD68, CD206 and CCR7 positive cells. (E) The M2-phenotypical genes and inflammatory genes expression of macrophage (n = 3, ∗p < 0.05, ∗∗p < 0.01, ∗∗∗p < 0.001).

Article Snippet: The reagents used in the experiment included: H-DMEM(11965118, Gibco, USA.), α-DMEM medium(12571063, Gibco, USA.), TritonX-100(ST1723, Beyotime, China), 4 % paraformaldehyde (BL539A, Biosharp, China),FBS(A5256701, Gibco, USA.),ECM medium (Science Cell, USA.),and DAPI staining solution (C1006, Beyotime, China),BCIP/NBT(C3206, Beyotime, China), reactive oxygen species kit (S0033S, Beyotime, China), BSA (B2064, ≥98 %, Sigma-Aldrich, USA.),CD31 antibody (ab28364, Abcam, USA.), secondary anti-IGg (ab175773, Alexa Fluor® 680, Abcam, USA.), Phalloidin-iFluor 488(ab176753, Abcam, USA.), CCR7(AF5293, Bioss, China), CD206 (bsm-60761R, Bioss, China), iNOS (bs-22924R, Bioss, China), RIPA (P0013, Beyotime, China), p-ERK1/2 (AF3687, Affinity, USA.) and ERK1/2 (#AF0155, Affinity, USA), luminol detection reagent (sc-2048, Santa Cruz, USA.), GAPDH (Cat#KC-5G5, Kangchen Biotechnology, China), Trizol(15596026CN, Invitrogen, USA.), DEPC(R0601, Thermo Scientific, USA.), TBST(R017R.0000, Thermo Scientific, USA.), HIF-1a(GTX127309, GeneTex, USA.), β-Tubulin(10094-1-AP, Proteintech, UK) Adezmapimod (SB 203580, MCE, USA.) medium and Paclitaxel (99.88 %, HY-B0015R, MCE), ELISA Arg-1(E-EL-M3092, ELabSci@, China), TNF-α (E-EL-M3063, ELabSci@, China), OPN(22952-1-AP, Proteintech, UK.), F4/80 (GB11027-100, Servicebio, China) Alkaline phosphatase activity kit (P0321S, Beyotime, China), Matrigel (CLS356234, Corning, USA), Microfill MV120 (Flow tech, USA), EDTA(17892, Thermo Scientific, USA.) xylene(X112051, AR,99 %, Aladdin, China), ethanol (107-21-1, AR,99 %, Aladdin, China).

Techniques: Immunohistochemical staining, Immunofluorescence, Staining, Expressing

Journal: Genes & Diseases

Article Title: Dual-mode aptamer-driven biosensing platform for ultrasensitive and mutation-resilient detection of the SARS-CoV-2 nucleocapsid protein

doi: 10.1016/j.gendis.2025.101943

Figure Lengend Snippet: Workflow of NP14 aptamer screening and development of the MD ELAAA detection platform. (A) Schematic illustration of the X-aptamer protein SELEX process for isolating aptamers. (B) Schematic illustration of the ultrasensitive detection of the SARS-CoV-2 N protein via the MD ELAAA platform.

Article Snippet: X-Aptamer libraries were acquired from AM Biotechnologies (Houston, Texas, USA); His-Tag magnetic beads (Invitrogen, DynabeadsTM His-Tag Isolation & Pulldown, 10103D), SARS-CoV-2 N protein, and anti-SARS-CoV-2 N protein monoclonal antibodies (anti-SARS-CoV-2 N protein mAb, Cat: 40143-MM05, 40588-R001) were purchased from Sino Biological.

Techniques:

Journal: Genes & Diseases

Article Title: Dual-mode aptamer-driven biosensing platform for ultrasensitive and mutation-resilient detection of the SARS-CoV-2 nucleocapsid protein

doi: 10.1016/j.gendis.2025.101943

Figure Lengend Snippet: Binding affinity and stability characterization of the NP14 aptamer. (A) Magnetic bead (12.5 mg/mL, 3 μL) flow assay for the binding of the aptamer to the His-tag SARS-CoV-2 N protein (1 μg). (B) Flow cytometry analysis of the binding of 300 nM FAM-labeled aptamer NP14 to magnetic beads coated with the SARS-CoV-2 N protein. (C) Flow cytometry analysis of the binding of 300 nM FAM-labeled NP14 to magnetic beads coated with the SARS-CoV-2 N protein at different temperatures (4 °C, 25 °C, and 37 °C). (D) The binding affinity of NP14 for the SARS-CoV-2 N protein was validated via the use of 2 μg/mL SARS-CoV-2 N protein and biotin-labeled NP14 at different concentrations (0, 2.5, 5, 10, 20, 50, 100, 150, and 200 nM). (E) Determination of the Kd value of aptamer NP14 (15.625, 31.25, 62.5, 125, 250, and 500 nM) via surface plasmon resonance. (F) Confocal analysis of 300 nM FAM-labeled aptamer NP14 with SARS-CoV-2 N protein-coated magnetic beads (scale bar = 30 μm).

Article Snippet: X-Aptamer libraries were acquired from AM Biotechnologies (Houston, Texas, USA); His-Tag magnetic beads (Invitrogen, DynabeadsTM His-Tag Isolation & Pulldown, 10103D), SARS-CoV-2 N protein, and anti-SARS-CoV-2 N protein monoclonal antibodies (anti-SARS-CoV-2 N protein mAb, Cat: 40143-MM05, 40588-R001) were purchased from Sino Biological.

Techniques: Binding Assay, Flow Cytometry, Labeling, Magnetic Beads, SPR Assay

Journal: Genes & Diseases

Article Title: Dual-mode aptamer-driven biosensing platform for ultrasensitive and mutation-resilient detection of the SARS-CoV-2 nucleocapsid protein

doi: 10.1016/j.gendis.2025.101943

Figure Lengend Snippet: Structural basis and binding mechanism of NP14 interaction with the SARS-CoV-2 N protein. (A) Molecular simulation of the binding mode between aptamer NP14 and the SARS-CoV-2 N protein ( http://www.rcsb.org , ID:6VYO) via AutoDock. (B) Enlarged view of the presumed binding area. (C) Nucleic acid sequences and corresponding amino acids involved in the docking model. (D) Secondary structure simulation of aptamer NP14 via the Nupack web server at 37 °C. (E) Secondary structure simulation of the truncated chains NP14a via the Nupack web server at 37 °C. (F) Secondary structure simulation of the truncated chains NP14b via the Nupack web server at 37 °C. (G) Binding analysis of NP14 with truncated NP14a, NP14b, and base-mutated 400 nM NP14a1, NP14a2, NP14a3, NP14a4, NP14b1, NP14b2, NP14b3, NP14b4, and NP14b5 to the SARS-CoV-2 N protein by ELONA. Data were presented as mean ± standard deviation of triplicate results ( n = 3). The NP14 control: ns, not significant; ∗ p < 0.05, ∗∗ p < 0.01, and ∗∗∗ p < 0.001. (H) Circular dichroism spectroscopy of AS1411 (20 μM) and NP14 (10 μM) was performed in PBS buffer (0.01 M, pH = 7.4) at wavelengths ranging from 220 to 320 nm. (I) Domain organization of the SARS-CoV-2 N protein, with numbers indicating domain boundaries. (J) Immunomagnetic beads (40 μL, 10 mg/mL) labeled with Flag antibodies against the truncated overexpressed protein were reacted with 300 nM biotin-labeled NP14 to assess binding. Data were presented as mean ± standard deviation of triplicate results ( n = 3). Compared with the blank control: ∗∗∗∗ p < 0.0001. (K) 250 nM biotin-labeled NP14 was mixed with 250 nM unlabeled N1, A58, A61 and competitive binding was analyzed by ELONA. Data were presented as mean ± standard deviation of four replicate results ( n = 4). Compared with the NP14: ns, not significant; ∗∗∗ p < 0.001. (L) Evaluation of the binding affinity for truncated proteins containing the NTD region at different concentrations of NP14 (0, 2, 5, 10, 20, 50, and 100 nM). Data were presented as mean ± standard deviation of triplicate results ( n = 3).

Article Snippet: X-Aptamer libraries were acquired from AM Biotechnologies (Houston, Texas, USA); His-Tag magnetic beads (Invitrogen, DynabeadsTM His-Tag Isolation & Pulldown, 10103D), SARS-CoV-2 N protein, and anti-SARS-CoV-2 N protein monoclonal antibodies (anti-SARS-CoV-2 N protein mAb, Cat: 40143-MM05, 40588-R001) were purchased from Sino Biological.

Techniques: Binding Assay, Standard Deviation, Control, Circular Dichroism, Spectroscopy, Labeling

Journal: Genes & Diseases

Article Title: Dual-mode aptamer-driven biosensing platform for ultrasensitive and mutation-resilient detection of the SARS-CoV-2 nucleocapsid protein

doi: 10.1016/j.gendis.2025.101943

Figure Lengend Snippet: Specificity and cross-variant recognition of NP14 for the SARS-CoV-2 N protein. (A) ELONA method detection mode diagram. (B) NP14 labeled with 400 nM biotin was used with various proteins (1 μg/mL): SARS-CoV N protein, human coronavirus (HCoV) 229E, OC43, HKU1, SARS-CoV-2 receptor-binding domain (RBD), alpha-fetoprotein (AFP), interleukin-4 (IL-4), bovine serum albumin (BSA), and influenza (InFlu) A and B proteins, to validate the specificity of NP14 via ELISA. Data were presented as mean ± standard deviation of triplicate results ( n = 3). Compared with the SARS-CoV-2 N protein: ns, not significant; ∗∗∗∗ p < 0.0001. (C) Direct detection of SARS-CoV-2 N protein binding activity at various concentrations (0, 0.5, 1, 5, 10, 20, 50, 100, 200, 500, 800, and 1000 ng/mL) via the ELONA platform. Data were presented as mean ± standard deviation of triplicate results ( n = 3). (D – L) Detection of NP14 (biotin-labeled, 400 nM) binding to N recombinant proteins from SARS-CoV-2 variants at different concentrations (0, 5, 10, 20, 50, 100, 200, 500, and 1000 ng/mL) on the direct ELONA platform. Variants included (D) alpha, (E) beta, (F) gamma, (G) delta, (H) omicron B.1.640, (I) omicron BA.2, (J) lambda, (K) omicron BA.1, and (L) omicron BA.4.

Article Snippet: X-Aptamer libraries were acquired from AM Biotechnologies (Houston, Texas, USA); His-Tag magnetic beads (Invitrogen, DynabeadsTM His-Tag Isolation & Pulldown, 10103D), SARS-CoV-2 N protein, and anti-SARS-CoV-2 N protein monoclonal antibodies (anti-SARS-CoV-2 N protein mAb, Cat: 40143-MM05, 40588-R001) were purchased from Sino Biological.

Techniques: Variant Assay, Labeling, Binding Assay, Enzyme-linked Immunosorbent Assay, Standard Deviation, Protein Binding, Activity Assay, Recombinant

Journal: Genes & Diseases

Article Title: Dual-mode aptamer-driven biosensing platform for ultrasensitive and mutation-resilient detection of the SARS-CoV-2 nucleocapsid protein

doi: 10.1016/j.gendis.2025.101943

Figure Lengend Snippet: Comparative sensitivity and specificity of antibody–antibody versus antibody–aptamer sandwich assays. (A) Standard curve for the sandwich assay (1 μg/mL antibody) using the SARS-CoV-2 N protein at various concentrations (0, 0.1, 0.5, 1, 5, 10, 20, 50, 100, 200, 500, and 1000 ng/mL). Data were presented as mean ± standard deviation of triplicate results ( n = 3). (B) Standard curve of the SARS-CoV-2 N protein in the antibody‒aptamer sandwich mode using SARS-CoV-2 N protein at various concentrations (0, 0.2, 0.5, 1, 5, 10, 20, 50, 100, 200, 500, and 1000 ng/mL). Data were presented as mean ± standard deviation of triplicate results ( n = 3). (C) Specificity validation with multiple proteins (1 μg/mL), including: SARS-CoV-2 receptor-binding domain (RBD), alpha-fetoprotein (AFP), interleukin-4 (IL-4), bovine serum albumin (BSA), influenza (InFlu) A and B proteins, to validate the specificity of the antibody–antibody (1 μg/mL) sandwich assay. Data were presented as mean ± standard deviation of triplicate results ( n = 3). Compared with the blank control: ns, not significant; ∗∗ p < 0.01 and ∗∗∗∗ p < 0.0001. (D) Validation was performed using multiple proteins at a concentration of 1 μg/mL, including: SARS-CoV-2 RBD, AFP, IL-4, BSA, InFlu A and B proteins, to validate the specificity of the antibody (1 μg/mL)-aptamer (200 nM) sandwich assay. Data were presented as mean ± standard deviation of triplicate results ( n = 3). Compared with the blank control: ns, not significant; ∗∗∗∗ p < 0.0001.

Article Snippet: X-Aptamer libraries were acquired from AM Biotechnologies (Houston, Texas, USA); His-Tag magnetic beads (Invitrogen, DynabeadsTM His-Tag Isolation & Pulldown, 10103D), SARS-CoV-2 N protein, and anti-SARS-CoV-2 N protein monoclonal antibodies (anti-SARS-CoV-2 N protein mAb, Cat: 40143-MM05, 40588-R001) were purchased from Sino Biological.

Techniques: Standard Deviation, Biomarker Discovery, Binding Assay, Control, Concentration Assay

Journal: Genes & Diseases

Article Title: Dual-mode aptamer-driven biosensing platform for ultrasensitive and mutation-resilient detection of the SARS-CoV-2 nucleocapsid protein

doi: 10.1016/j.gendis.2025.101943

Figure Lengend Snippet: Analytical performance of the MD ELAAA platform in detecting the SARS-CoV-2 N protein and viral cultures. (A) Schematic illustration of the modulation of the Ag shell layer thickness in core–shell AuNFs@Ag nanostructures leading to changes in the localized surface plasmon resonance (LSPR) and light scattering intensity. (B) Standard curve of the MD ELAAA method for different SARS-CoV-2 N proteins (0, 0.005, 0.01, 0.02, 0.05, 0.1, 0.5, 1, 2, and 5 ng/mL). Data were presented as mean ± standard deviation of triplicate results ( n = 3). (C) Validation was performed using multiple proteins at a concentration of 1 ng/mL, including: SARS-CoV-2 receptor-binding domain (RBD), alpha-fetoprotein (AFP), interleukin-4 (IL-4), bovine serum albumin (BSA), influenza (InFlu) A and B proteins, to validate the specificity of the MD ELAAA platform. Data were presented as mean ± standard deviation of triplicate results ( n = 3). The blank control: ns, not significant; ∗∗∗∗ p < 0.0001. (D) Standard curve of the MD ELAAA method for SARS-CoV-2 virus cultures at different concentrations (0, 1, 2, 5, 10, 20, 50, 100, and 200 TCID 50 /mL). Data were presented as mean ± standard deviation of triplicate results ( n = 3). (E) Standard curve of the ELAAA method for SARS-CoV-2 virus cultures at different concentrations (0, 10, 20, 50, 100, 200, 300, 500, and 1000 TCID 50 /mL). Data were presented as mean ± standard deviation of triplicate results ( n = 3).

Article Snippet: X-Aptamer libraries were acquired from AM Biotechnologies (Houston, Texas, USA); His-Tag magnetic beads (Invitrogen, DynabeadsTM His-Tag Isolation & Pulldown, 10103D), SARS-CoV-2 N protein, and anti-SARS-CoV-2 N protein monoclonal antibodies (anti-SARS-CoV-2 N protein mAb, Cat: 40143-MM05, 40588-R001) were purchased from Sino Biological.

Techniques: SPR Assay, Standard Deviation, Biomarker Discovery, Concentration Assay, Binding Assay, Control, Virus

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