Journal: Advanced Science

Article Title: Melanoma Derived Exosomes Amplify Radiotherapy Induced Abscopal Effect via IRF7/I‐IFN Axis in Macrophages

doi: 10.1002/advs.202304991

Figure Lengend Snippet: CircPIK3R3/IRF7/I‐IFN axis participates in the combination of radiotherapy and anti‐PD1 mediated abscopal effect. A) The treatment model involving RT, anti‐PD1, and RO8191: C57/BL6 mice were subcutaneously inoculated with 1 × 106 sh‐NC B16F10 cells or sh‐circ‐0011074 B16F10 cells. On day 5, C57/BL6 mice were intravenously injected with 1 × 106 B16F10‐luc cells. Starting from day 6, mice were administered the IFN receptor agonist RO8191 via daily intraperitoneal injections at a dose of 1 mg kg −1 . On day 7, radiotherapy was initiated, with a daily dose of 8 Gy administered for 3 consecutive days. On day 7, mice were also administered anti‐PD1 via intraperitoneal injection every 2 days at a dose of 100 µg/mouse until the endpoint of observation. B,C) Measurement of subcutaneous tumor weight in each group to assess treatment efficacy ( n = 3). D,E) Evaluation of fluorescent intensity in lung metastatic foci using bioluminescence imaging to assess treatment efficacy ( n = 6). F,G) Immunohistochemical examination of CD8 + T cell infiltration in subcutaneous tumors and lung metastatic foci ( n = 3). H,I) Immunofluorescence detection of IRF7 + macrophage infiltration in subcutaneous tumors and lung metastatic foci (n = 3). Data are presented as mean ± SEM. * p < 0.05, ** p < 0.01, *** p < 0.001, **** p < 0.0001 by two‐tailed unpaired Student t‐test.

Article Snippet: Anti‐mouse PD‐1 mAb (Bio X Cell, USA) was administered intraperitoneally (200 mg per mouse) every 2 days during treatment.

Techniques: Injection, Imaging, Immunohistochemical staining, Immunofluorescence, Two Tailed Test

Journal: PLOS One

Article Title: CD99-targeted immunomagnetic negative selection: A novel strategy for high-purity pancreatic islet isolation in murine models

doi: 10.1371/journal.pone.0344446

Figure Lengend Snippet: (A) Immunofluorescence co-localization analysis. Paraffin-embedded mouse pancreatic sections were immunostained with antibodies against insulin (green) and CD99 (red), followed by DAPI counterstaining (blue) for nuclear visualization. CD99 immunoreactivity (red) was exclusively localized to exocrine tissue and did not co-localize with insulin-positive β-cells (green), magnification, 20 × ; scale bar, 100 μm. (B) Immunohistochemical analysis. CD99 expression (brown) was evaluated in paraffin-embedded sections of intact mouse pancreas, purified islets, and isolated exocrine fragments. Robust CD99 immunoreactivity was observed in exocrine regions of intact pancreatic tissue, while islets remained consistently negative. Purified islets exhibited no detectable CD99 expression, magnification, 40 × ; scale bars, 50 μm (pancreas sections), 10 μm (purified islets and exocrine fragments). ( C ) western blot analysis. CD99 protein expression was quantified in purified islets and isolated exocrine fragments. CD99 was selectively detected in exocrine samples while remaining undetectable in islet preparations. β-Actin served as the loading control.

Article Snippet: Biotinylated and unconjugated anti-CD99 antibodies were purchased from Beijing Solarbio Science & Technology Co., Ltd. Anti-insulin antibodies, enhanced chemiluminescence (ECL) reagents, and fluorophore-conjugated secondary antibodies were acquired from Proteintech.

Techniques: Immunofluorescence, Immunohistochemical staining, Expressing, Purification, Isolation, Western Blot, Control

Journal: PLOS One

Article Title: CD99-targeted immunomagnetic negative selection: A novel strategy for high-purity pancreatic islet isolation in murine models

doi: 10.1371/journal.pone.0344446

Figure Lengend Snippet: (A, B) Representative images of dithizone-stained pancreatic digest samples. (A) Unpurified sample demonstrating mixed cellular composition (islets stained red, exocrine tissue grayish-white). (B) Sample after CD99-targeted immunomagnetic purification, showing substantial enrichment of islets.(C, D) Representative images of dithizone-stained samples processed by Ficoll density gradient centrifugation. (C) Initial unpurified digest. (D) Sample after Ficoll purification.(E) Quantitative analysis of islet purity. Initial purity of digests was comparable between groups. CD99-targeted purification achieved a final purity of 93.0 ± 1.4%, significantly higher than the 69.2 ± 1.1% achieved by Ficoll purification. Data represent mean ± SEM; n = 3 per group. **** p < 0.0001.(F) Quantitative analysis of islet recovery rate. The recovery rate after CD99-targeted purification (81.7 ± 2.2%) was significantly higher than that after Ficoll purification (31 ± 1.5%). Data represent mean ± SEM; n = 3 per group. **** p < 0.0001.

Article Snippet: Biotinylated and unconjugated anti-CD99 antibodies were purchased from Beijing Solarbio Science & Technology Co., Ltd. Anti-insulin antibodies, enhanced chemiluminescence (ECL) reagents, and fluorophore-conjugated secondary antibodies were acquired from Proteintech.

Techniques: Staining, Purification, Gradient Centrifugation

Journal: PLOS One

Article Title: CD99-targeted immunomagnetic negative selection: A novel strategy for high-purity pancreatic islet isolation in murine models

doi: 10.1371/journal.pone.0344446

Figure Lengend Snippet: Pancreatic islets (400 IEQ) purified via CD99-based immunomagnetic separation or Ficoll density gradient centrifugation were transplanted beneath the renal capsule of streptozotocin (STZ)-induced diabetic mice. Glycemic control and body weight were monitored over 40 days post-transplantation. (A) Glycemic response. All recipients exhibited hyperglycemia prior to transplantation (Day 0). Both treatment groups demonstrated rapid glucose normalization, achieving euglycemia (<200 mg/dL) by day 3 post-transplantation, which was sustained throughout the observation period. Area under the curve (AUC) analysis revealed no significant difference in overall glycemic control between purification methods, confirming equivalent therapeutic efficacy. n = 5; ns, not significant, p > 0.05. (B) Body weight dynamics. Both groups exhibited initial transient weight loss followed by progressive recovery, consistent with metabolic restoration. No significant inter-group differences were observed throughout the study period. n = 5; ns, not significant, p > 0.05.

Article Snippet: Biotinylated and unconjugated anti-CD99 antibodies were purchased from Beijing Solarbio Science & Technology Co., Ltd. Anti-insulin antibodies, enhanced chemiluminescence (ECL) reagents, and fluorophore-conjugated secondary antibodies were acquired from Proteintech.

Techniques: Purification, Immunomagnetic Separation, Gradient Centrifugation, Control, Transplantation Assay, Drug discovery

Journal: Nature Communications

Article Title: Kinesin-1 regulates antigen cross-presentation through the scission of tubulations from early endosomes in dendritic cells

doi: 10.1038/s41467-020-15692-0

Figure Lengend Snippet: a Relative quantification of Kif5a, Kif5b and Kif5c transcripts by real-time PCR in CD8α + and CD11b + DCs and BMDCs from WT or cKO Kif5b mice. Transcript levels for each sample are expressed relative to Kif5b. Graph shows mean ± S.E.M. ( n = 3). b Contour plots of DCs from the spleen of either WT or cKO Kif5b mice pregated on CD19 − , Gr − , F4/80 − CD11c + , and IA/IE + . The data are representative of three independent experiments. c Absolute numbers of CD11b + DCs and CD8α + DCs in the spleen of WT (blue circles) and cKO Kif5b (red squares) mice. The data are representative of five independent experiments. d – g The efficiency of cross-presentation of different concentration of sOVA and the presentation of OVA peptide SIINFEKL in vitro by CD8α + DCs ( d , g ), CD11b + DCs ( e , g ) and BMDCs ( f , g ) from WT (blue histogram or line) or cKO Kif5b (red histogram or line) mice was measured as IL-2 secretion by OT-I T cells after 16 h of co-culture. Graph shows mean ± S.E.M. ( n = 4). Statistical significance was determined by the two-way ANOVA and Sidak test’s correction for multiple comparison. * P < 0.05; ** P < 0.005; *** P < 0.0001.

Article Snippet: Anti-CD11c (BV711 (BioLegend), APC (BD Biosciences) PB (Sony)), anti-IA/IE FITC (BD Biosciences), anti-CD8α BV450 (Sony), anti-CD11b (PE (BD Biosciences), APC-CY7 (Sony)), anti-F4/80 PE/Cy7 (Sony), anti-GR1 APC (BD Biosciences), anti-CD19 (PerCP (BD Biosciences), PerCP/Cy5.5 (Sony)), anti-B220 BV650 (BioLegend), anti-CD86 BV650 (Sony), anti-CD40 PE/Cy7 (Sony), mouse monoclonal Kif5b antibody (Biolegend), purified rabbit anti-α-tubulin (Rockland), goat anti-EEA1 antibody (Santa Cruz Biotechnology), rat anti-Lamp1 antibody (Invitrogen), H-2Kb PE antibody (Biolegend), AF6-88.5 clone (Biolegend), rabbit Rab11 antibody (Life Technologies), anti-CD71 PE antibody (Sony), Alexa Fluor-594 donkey anti-rat IgG (H+L) (Life Technologies), Alexa Fluor-555 donkey anti-goat IgG (H+L) (Life Technologies), Alexa Fluor-488 donkey anti-mouse IgG (H+L) (Life Technologies), and Alexa Fluor-555 donkey anti-rabbit IgG (H+L) (Life Technologies) were used.

Techniques: Quantitative Proteomics, Real-time Polymerase Chain Reaction, Concentration Assay, In Vitro, Co-Culture Assay, Comparison

Journal: Nature Communications

Article Title: Kinesin-1 regulates antigen cross-presentation through the scission of tubulations from early endosomes in dendritic cells

doi: 10.1038/s41467-020-15692-0

Figure Lengend Snippet: a Tumour growth curves for WT (blue line) or cKO Kif5b (orange line) mice injected subcutaneously with B16-OVA cells and adoptively transferred with OT-I T cells (WT purple line, cKO Kif5b yellow line). Tumour growth was monitored daily, and non-survival was defined as ulceration of the tumour or a mean tumour diameter of 15 mm. The data are quoted as the mean ± SEM from two independent experiments (WT, WT OT1, cKO Kif5b n = 10 mice per group, cKO Kif5b OT1 n = 9 mice). Statistical significance was determined by the two-way ANOVA and Sidak test’s correction for multiple comparison. * P < 0.05; ** P < 0.005; *** P < 0.0001. b Survival curves for WT or cKO Kif5b mice, treated as in a . Statistical significance was determined by the log-rank test and by the Gehan–Breslow–Wilcoxon test. * P < 0.05; ** P < 0.005. c Mice were injected with Violet-labelled transgenic OT-I T cells and primed 1 day later with CD11c/P3UOVA (WT blue line or circles, cKO Kif5b red line or circles; WT mice n = 7, cKO Kif5b mice n = 7). The left panel shows representative profiles gated on CD8 + , TCR Vα2 + cells. Statistical analysis of the division index is shown in the right panel: ** P < 0.005 in a two-tailed unpaired Student’s t test. Graph shows mean ± S.E.M.

Article Snippet: Anti-CD11c (BV711 (BioLegend), APC (BD Biosciences) PB (Sony)), anti-IA/IE FITC (BD Biosciences), anti-CD8α BV450 (Sony), anti-CD11b (PE (BD Biosciences), APC-CY7 (Sony)), anti-F4/80 PE/Cy7 (Sony), anti-GR1 APC (BD Biosciences), anti-CD19 (PerCP (BD Biosciences), PerCP/Cy5.5 (Sony)), anti-B220 BV650 (BioLegend), anti-CD86 BV650 (Sony), anti-CD40 PE/Cy7 (Sony), mouse monoclonal Kif5b antibody (Biolegend), purified rabbit anti-α-tubulin (Rockland), goat anti-EEA1 antibody (Santa Cruz Biotechnology), rat anti-Lamp1 antibody (Invitrogen), H-2Kb PE antibody (Biolegend), AF6-88.5 clone (Biolegend), rabbit Rab11 antibody (Life Technologies), anti-CD71 PE antibody (Sony), Alexa Fluor-594 donkey anti-rat IgG (H+L) (Life Technologies), Alexa Fluor-555 donkey anti-goat IgG (H+L) (Life Technologies), Alexa Fluor-488 donkey anti-mouse IgG (H+L) (Life Technologies), and Alexa Fluor-555 donkey anti-rabbit IgG (H+L) (Life Technologies) were used.

Techniques: Injection, Comparison, Transgenic Assay, Two Tailed Test

Journal: Nature Communications

Article Title: Kinesin-1 regulates antigen cross-presentation through the scission of tubulations from early endosomes in dendritic cells

doi: 10.1038/s41467-020-15692-0

Figure Lengend Snippet: a CD8α + , CD11b + DCs and BMDCs from WT (blue histogram) or cKO Kif5b (red histogram) mice were incubated for 10, 30 or 60 min at 37 °C or for 10 min at 4 °C with Alexa-Flour-647-OVA prior to flow cytometry analysis. The figure shows a histogram that was representative of three independent experiments. b CD8α + , CD11b + DCs and BMDCs from WT (blue line) or cKO Kif5b (red line) mice were incubated for 30 min at 37 °C with DQ-OVA. Next, the cells were washed. DQ-OVA degradation was analysed by flow cytometry after different chase periods. Graphs are representative of four independent experiments. Statistical significance was determined by the two-way ANOVA and Sidak test’s correction for multiple comparison. *** P < 0.0001. c Degradation of DQ-OVA in BMDCs from WT (DMSO blue line, Conc-A or Cath I purple line) or cKO Kif5b (DMSO orange line, Conc-A or Cath I yellow line) mice pretreated or not with concanamycin A (Conc-A) or a cathepsin inhibitor-I (Cath I). Graphs are representative of four independent experiments. Statistical significance was determined by the two-way ANOVA and Sidak test’s correction for multiple comparison. ** P < 0.005; *** P < 0.0001. d The pH values in CD8α + , CD11b + DCs and BMDCs from WT (blue line) or cKO Kif5b (red line) mice were determined by FACS after a pulse and different chase periods. Graphs are representative of four independent experiments. Statistical significance was determined by the two-way ANOVA and Sidak test’s correction for multiple comparison. * P < 0.05; ** P < 0.005; *** P < 0.0001. e Protease activity of CatB/L in early (20 min) or late (120 min) using total cell lysate from BMDCs from WT (blue histogram) or cKO Kif5b (red histogram) mice was measured with a specific fluorescent substrate. Graphs are representative of three independent experiments. Statistical significance was determined by the two-way ANOVA and Sidak test’s correction for multiple comparison. *** P < 0.0001. a – e Graphs show mean ± S.E.M.

Article Snippet: Anti-CD11c (BV711 (BioLegend), APC (BD Biosciences) PB (Sony)), anti-IA/IE FITC (BD Biosciences), anti-CD8α BV450 (Sony), anti-CD11b (PE (BD Biosciences), APC-CY7 (Sony)), anti-F4/80 PE/Cy7 (Sony), anti-GR1 APC (BD Biosciences), anti-CD19 (PerCP (BD Biosciences), PerCP/Cy5.5 (Sony)), anti-B220 BV650 (BioLegend), anti-CD86 BV650 (Sony), anti-CD40 PE/Cy7 (Sony), mouse monoclonal Kif5b antibody (Biolegend), purified rabbit anti-α-tubulin (Rockland), goat anti-EEA1 antibody (Santa Cruz Biotechnology), rat anti-Lamp1 antibody (Invitrogen), H-2Kb PE antibody (Biolegend), AF6-88.5 clone (Biolegend), rabbit Rab11 antibody (Life Technologies), anti-CD71 PE antibody (Sony), Alexa Fluor-594 donkey anti-rat IgG (H+L) (Life Technologies), Alexa Fluor-555 donkey anti-goat IgG (H+L) (Life Technologies), Alexa Fluor-488 donkey anti-mouse IgG (H+L) (Life Technologies), and Alexa Fluor-555 donkey anti-rabbit IgG (H+L) (Life Technologies) were used.

Techniques: Incubation, Flow Cytometry, Comparison, Activity Assay

Journal: Nature Communications

Article Title: Kinesin-1 regulates antigen cross-presentation through the scission of tubulations from early endosomes in dendritic cells

doi: 10.1038/s41467-020-15692-0

Figure Lengend Snippet: BMDCs from WT or cKO Kif5b mice were incubated for 15, 30 or 60 min with Alexa-Flour-647-OVA and then plated on glass coverslips. The cells were fixed, permeabilized and stained with anti-EEA1, anti-Lamp1 or anti-Rab11 antibodies. The left panel shown representative images for the 15 min time point observed in three independent experiments. Bars: 5 μm. n = 32 cells per condition. Statistical significance (shown in the right panel; WT blue circle, cKO Kif5b red square) was determined by the two-way ANOVA and Sidak test’s correction for multiple comparison. ** P < 0.005; *** P < 0.0001. Graphs show mean ± S.E.M.

Article Snippet: Anti-CD11c (BV711 (BioLegend), APC (BD Biosciences) PB (Sony)), anti-IA/IE FITC (BD Biosciences), anti-CD8α BV450 (Sony), anti-CD11b (PE (BD Biosciences), APC-CY7 (Sony)), anti-F4/80 PE/Cy7 (Sony), anti-GR1 APC (BD Biosciences), anti-CD19 (PerCP (BD Biosciences), PerCP/Cy5.5 (Sony)), anti-B220 BV650 (BioLegend), anti-CD86 BV650 (Sony), anti-CD40 PE/Cy7 (Sony), mouse monoclonal Kif5b antibody (Biolegend), purified rabbit anti-α-tubulin (Rockland), goat anti-EEA1 antibody (Santa Cruz Biotechnology), rat anti-Lamp1 antibody (Invitrogen), H-2Kb PE antibody (Biolegend), AF6-88.5 clone (Biolegend), rabbit Rab11 antibody (Life Technologies), anti-CD71 PE antibody (Sony), Alexa Fluor-594 donkey anti-rat IgG (H+L) (Life Technologies), Alexa Fluor-555 donkey anti-goat IgG (H+L) (Life Technologies), Alexa Fluor-488 donkey anti-mouse IgG (H+L) (Life Technologies), and Alexa Fluor-555 donkey anti-rabbit IgG (H+L) (Life Technologies) were used.

Techniques: Incubation, Staining, Comparison

Journal: Nature Communications

Article Title: Kinesin-1 regulates antigen cross-presentation through the scission of tubulations from early endosomes in dendritic cells

doi: 10.1038/s41467-020-15692-0

Figure Lengend Snippet: a CD8α + , CD11b + DCs and BMDCs from WT (blue line) or cKO Kif5b (red line) mice were labelled for H-2K b and analysed using FACS. The figure shows a FACS histogram that was representative of three independent experiments. b MHC-I recycling ability in CD8α + , CD11b + DCs and BMDCs from WT (blue line) or cKO Kif5b (red line) mice was measured using FACS at the indicated time points. Statistical significance was determined by the two-way ANOVA and Sidak test’s correction for multiple comparison. ** P < 0.005; *** P < 0.0001. c TrfR (CD71) recycling ability was measured using FACS at the indicated time periods in CD8α + , CD11b + DCs and BMDCs from WT or cKO kif5b mice. Statistical analysis: * P < 0.05; ** P < 0.005; *** P < 0.0001 in the two-way ANOVA and Sidak test’s correction for multiple comparison. d MHC-I recycling in the presence of primaquine in BMDCs from WT or cKO Kif5b mice was measured using FACS at the indicated time points. Statistical analysis: ** P < 0.005; in the two-way ANOVA and Sidak test’s correction for multiple comparison. b – d Graphs are representative of four independent experiments. e BMDCs from WT or cKO kif5b mice were plated on glass coverslips and were fixed, permeabilized and stained with anti-EEA1, anti-Rab11 or anti-MHC-I antibodies. Representative images are shown in the left panel observed in three independent experiments. ( n = 33 cells per condition upper panel, n = 29 cells per condition lower panel) Bars: 5 μm. Statistical analysis (shown in the right panel; WT blue circle, cKO Kif5b red square): ** P < 0.005; *** P < 0.0001 in an two-tailed unpaired Student’s t test. b – e Graphs show mean ± S.E.M.

Article Snippet: Anti-CD11c (BV711 (BioLegend), APC (BD Biosciences) PB (Sony)), anti-IA/IE FITC (BD Biosciences), anti-CD8α BV450 (Sony), anti-CD11b (PE (BD Biosciences), APC-CY7 (Sony)), anti-F4/80 PE/Cy7 (Sony), anti-GR1 APC (BD Biosciences), anti-CD19 (PerCP (BD Biosciences), PerCP/Cy5.5 (Sony)), anti-B220 BV650 (BioLegend), anti-CD86 BV650 (Sony), anti-CD40 PE/Cy7 (Sony), mouse monoclonal Kif5b antibody (Biolegend), purified rabbit anti-α-tubulin (Rockland), goat anti-EEA1 antibody (Santa Cruz Biotechnology), rat anti-Lamp1 antibody (Invitrogen), H-2Kb PE antibody (Biolegend), AF6-88.5 clone (Biolegend), rabbit Rab11 antibody (Life Technologies), anti-CD71 PE antibody (Sony), Alexa Fluor-594 donkey anti-rat IgG (H+L) (Life Technologies), Alexa Fluor-555 donkey anti-goat IgG (H+L) (Life Technologies), Alexa Fluor-488 donkey anti-mouse IgG (H+L) (Life Technologies), and Alexa Fluor-555 donkey anti-rabbit IgG (H+L) (Life Technologies) were used.

Techniques: Comparison, Staining, Two Tailed Test

Journal: Nature Communications

Article Title: Kinesin-1 regulates antigen cross-presentation through the scission of tubulations from early endosomes in dendritic cells

doi: 10.1038/s41467-020-15692-0

Figure Lengend Snippet: a Confocal microscopy of BMDCs from WT or cKO Kif5b mice stained with anti-tubulin and anti-Kif5b. Bars: 5 μm. The indicated box is shown at a higher magnification in the inset. Bars: 2 μm. b Confocal microscopy of WT BMDCs stained with anti-EEA1 and anti-Kif5b. The intersection between the two stainings is shown in white. The indicated boxes are shown at higher magnification in the insets. Bars: 2 μm. c A schematic representation of early endosome WGA labelling. d WT and cKO Kif5b BMDCs were labelled with WGA-488 and stained with anti-EEA1. Bars: 2 μm (left panel). Quantification of the colocalization between WGA-488 and EEA1-555 (right panel; WT blue histogram, cKO Kif5b red histogram; n = 7 cells per condition). All images of single cells are representative of >100 cells observed in three independent experiments ( a – d ). e Spinning disk video microscopy was performed on WT and cKO Kif5b BMDCs labelled with WGA-488. Representative series of images are shown every 25 s. Bars: 2 μm. Images are representative of four independent experiments. See also Supplementary Movies and . f The number of tubulations unable to detach per cell during the 5 min acquisition. (WT blue circles, cKO Kif5b red squares; n = 20 cells per condition). Statistical analysis: *** P < 0.0001 in a two-tailed unpaired Student’s t test. g The number of WGA-488-positive vesicular structures >1 μm in size was measured in WT (blue line) and cKO Kif5b (red line) BMDCs during the 5 min acquisition ( n = 13 cells per condition). Statistical analysis: *** P < 0.0001 in a two-way ANOVA and Sidak test’s correction for multiple comparison. h Schematic representation of the WGA labelling protocol (upper panel). Spinning disk video microscopy was performed on WT and cKO Kif5b BMDCs labelled with WGA-555 and WGA-488. Representative series of images observed in three independent experiments are shown at the indicated time periods (lower panel). Bars: 2 μm. i n = 10 cells per condition. Statistical analysis of the experiment in (WT blue histogram, cKO Kif5b red histogram) ( h ); *** P < 0.0001 in a two-way ANOVA and Sidak test’s correction for multiple comparison. d – i Graphs show mean ± S.E.M.

Article Snippet: Anti-CD11c (BV711 (BioLegend), APC (BD Biosciences) PB (Sony)), anti-IA/IE FITC (BD Biosciences), anti-CD8α BV450 (Sony), anti-CD11b (PE (BD Biosciences), APC-CY7 (Sony)), anti-F4/80 PE/Cy7 (Sony), anti-GR1 APC (BD Biosciences), anti-CD19 (PerCP (BD Biosciences), PerCP/Cy5.5 (Sony)), anti-B220 BV650 (BioLegend), anti-CD86 BV650 (Sony), anti-CD40 PE/Cy7 (Sony), mouse monoclonal Kif5b antibody (Biolegend), purified rabbit anti-α-tubulin (Rockland), goat anti-EEA1 antibody (Santa Cruz Biotechnology), rat anti-Lamp1 antibody (Invitrogen), H-2Kb PE antibody (Biolegend), AF6-88.5 clone (Biolegend), rabbit Rab11 antibody (Life Technologies), anti-CD71 PE antibody (Sony), Alexa Fluor-594 donkey anti-rat IgG (H+L) (Life Technologies), Alexa Fluor-555 donkey anti-goat IgG (H+L) (Life Technologies), Alexa Fluor-488 donkey anti-mouse IgG (H+L) (Life Technologies), and Alexa Fluor-555 donkey anti-rabbit IgG (H+L) (Life Technologies) were used.

Techniques: Confocal Microscopy, Staining, Microscopy, Two Tailed Test, Comparison

Journal: Nature

Article Title: Capillary cell-type specialization in the alveolus.

doi: 10.1038/s41586-020-2822-7

Figure Lengend Snippet: Fig. 1 | Two stable, intermingled alveolar capillary cell types. a, Alveolar capillaries in adult mouse lung immunostained for PECAM1. b, t-distributed stochastic neighbour embedding (t-SNE) plot of endothelial cell populations annotated in scRNA-seq data for adult mouse lung13. c, Heat map of expression of capillary subset markers and the general endothelial marker Cldn5 in individual capillary cells. CPM, counts per million. d–f, Single-molecule fluorescent in situ hybridization (smFISH) for the capillary subset markers Apln (d, f) or Ednrb and Car4 (aCap) (e), and Aplnr (gCap) (d–f), in adult mouse lung. Images in d (right) and f show individual aCap and gCap cells. g, Relative abundance of aCap cells, gCap cells and cells that co-express aCap and gCap markers (intermediate (IM) cells) in lungs from 3-month-old (young) and 24-month-old (aged) mice (data shown as mean; n = 500 cells scored per mouse; 2 mice per group). h, i, Co-expression of tdTomato lineage label (asterisks) and aCap marker Ednrb but not gCap marker Aplnr (h), or gCap marker Aplnr but not aCap marker Apln (i), in lungs collected six months after mature aCap (h) or gCap (i) cells were lineage-labelled. Blue, DAPI. Scale bars, 10 μm.

Article Snippet: CD34 (BD Biosciences, 347660):https://www.bdbiosciences.com/eu/applications/research/clinical-research/oncology-research/ 3 nature research | reporting sum m ary O ctober 2018 blood-cell-disorders/surface-markers/human/purified-mouse-anti-human-cd34-my10/p/347660 Endomucin (Invitrogen, eBioV.7C7, 14-5851-82): https://www.thermofisher.com/antibody/product/Endomucin-Antibody-cloneeBioV-7C7-V-7C7-Monoclonal/14-5851-82 Integrin alpha8 (R&D, AF4076): https://www.rndsystems.com/products/mouse-rat-integrin-alpha8-antibody_af4076 Pecam1 (rat anti-mouse; BD Biosciences, 553370): https://www.bdbiosciences.com/ds/pm/tds/553370.pdf Pecam1 (mouse anti-human; R&D, BBA7): https://www.rndsystems.com/products/human-cd31-pecam-1-antibody-9g11_bba7 tdTomato (Rockland, 600-401-379): https://rockland-inc.com/store/Antibodies-to-GFP-and-Antibodies-to-RFP-600-401-379O4L_24299.aspx VE-Cadherin (R&D, AF938): https://www.rndsystems.com/products/human-ve-cadherin-antibody_af938 The following primary antibodies were used to stain turtle and/or alligator tissue.

Techniques: Expressing, Marker, In Situ Hybridization