rabbit anti-xenopus laevis cd2ap polyclonal affinity purified antibody  (GenScript corporation)

Journal: Nature Communications

Article Title: Noncanonical function of folate through folate receptor 1 during neural tube formation

doi: 10.1038/s41467-024-45775-1

Figure Lengend Snippet: Two-cell stage Xenopus laevis embryos were microinjected with 3.2 ( a , c ) or 5.2 ( b ) pmol Control-MO (Control) or FOLR1-MO (FOLR1 KD) per embryo and incubated with saline or 50 μM pteroate until the neural tube closed in control embryos, when they were fixed, photomicrographed ( a , b ), sectioned and processed for immunostaining ( c ). a , b Examples of embryos in each group. Arrowheads indicate open neural tube (neural tube defect, NTD). Numbers are embryos presenting open (NTD, purple) or closed (green) neural tube. Bar graphs represent proportion of phenotypes in each group. c Examples of immunostained transverse sections of the neural tissue; n of embryos sectioned was 25, 39 and 42 in Control, FOLR1 KD, and FOLR1 KD+pteroate groups, respectively, in N = 3 independent experiments. Scale bar is 20 μm. Graph shows distribution of neural tissue defect score per group, median is indicated by dashed line. In ( a – c ), * p < 0.05, ** p < 0.01, *** p < 0.001, **** p < 0.0001, one-way ANOVA, Tukey post-hoc multiple comparison test ( a , b ), or Kruskal-Wallis, Dunn’s multiple comparison test ( c ). Source data are provided as a Source Data file.

Article Snippet: IP/Western blot antibodies were rabbit anti- Xenopus laevis CD2AP polyclonal affinity purified antibody raised against the peptide CRPKSEVEPHSKTKT custom made by GenScript and anti- Xenopus laevis FOLR1 antibody (GenScript).

Techniques: Control, Incubation, Saline, Immunostaining, Comparison

Journal: Nature Communications

Article Title: Noncanonical function of folate through folate receptor 1 during neural tube formation

doi: 10.1038/s41467-024-45775-1

Figure Lengend Snippet: a Two-cell stage Xenopus laevis embryos were bilaterally microinjected with 1.6 pmol Control-MO (Control) or FOLR1-MO (FOLR1 KD) per blastomere and allowed to grow until they reached mid-neural plate stages (stage 15–17) when neural plate was dissected and processed for Western blot assays. Example of Western blot assay. Graph shows individual and mean ± SD percent of optical density (OD) for C-cadherin immunoblot band normalized with GAPDH protein band OD and compared to controls. Two-tailed ratio t -test, n = 42 and 44 neural plates for Control and FOLR1 KD groups, respectively, N = 8 independent experiments. b – e Neural plate stage Xenopus laevis embryos were fixed, sectioned and processed for immunostaining. b – d Examples of immunostained neural plate. Arrows indicate colocalization of C-cadherin with early endosomal marker (EEA1) and ubiquitin ( b ), late endosomal marker (Rab7, c ) and lysosomal marker (LAMP1, d ). Scale bar, 10 μm. e Graph shows mean ± SD proportion of C-cadherin vesicles colocalizing with the indicated markers. Number of cells analyzed were 104, 52, 65 from immunostained samples in ( b , c and d ), respectively, from N = 5 embryos. f Two-cell stage Xenopus laevis embryos were bilaterally microinjected with hEEA1-GFP mRNA and membrane mCherry and unilaterally microinjected with 2.6–3.2 pmol FOLR1-MO (FOLR1 KD) or Control-MO (Control) per blastomere along with fluorescent tracer and allowed to develop until they reached early neural plate stages (stage 13-14), when they were time-lapse imaged with an acquisition rate of 1 frame/6 min. Schematic shows experimental design. Xenopus illustrations © Natalya Zahn (2022) obtained from Xenbase ( www.xenbase.org RRID:SCR_003280), released under a Creative Commons Attribution-NonCommercial 4.0 License (CC BY-NC) . Images are maximum intensity projection of single time frame. Dashed lines indicate border between wild-type (WT) and MO-injected neural plate. Insets show neural plate injected side with tracer in blue. Graphs show distribution between both halves of the neural plate (in %) of the number of EEA1-GFP vesicles and area fraction of labeled endosomes per neural plate cell surface. Two-tailed paired t -test; ns: not significant, n = 30 cells analyzed in each group, N = 5 embryos per group. Scale bar, 20 μm. In a , f , * p < 0.05, **** p < 0.0001. Source data are provided as a Source Data file.

Article Snippet: IP/Western blot antibodies were rabbit anti- Xenopus laevis CD2AP polyclonal affinity purified antibody raised against the peptide CRPKSEVEPHSKTKT custom made by GenScript and anti- Xenopus laevis FOLR1 antibody (GenScript).

Techniques: Control, Western Blot, Two Tailed Test, Immunostaining, Marker, Ubiquitin Proteomics, Membrane, Injection, Labeling

Journal: Nature Communications

Article Title: Noncanonical function of folate through folate receptor 1 during neural tube formation

doi: 10.1038/s41467-024-45775-1

Figure Lengend Snippet: Two-cell stage Xenopus laevis embryos were bilaterally microinjected with 1.6 pmol Control-MO (Control) or FOLR1-MO (FOLR1 KD) per blastomere, incubated from early neural plate stage (stage 12) with vehicle or proteasome and lysosome inhibitors until they reached mid-neural plate stages (stage 16–17) when neural plates were dissected and processed for Western blot ( a , b ) and immunoprecipitation ( b ) assays. a Example of Western blot assay immunoprobed for C-cadherin showing full-length and cleaved (~80 kD) forms. Graph shows individual and mean ± SD percent of optical density (OD) for cleaved C-cadherin band normalized with GAPDH protein band OD and compared to controls, n = 20 and 26 neural plates for Control and FOLR1 KD groups respectively, N = 3 independent experiments. b Example of immunoprecipitation (IP) assay for C-cadherin followed by Western blot assay for ubiquitin and C-cadherin. Graph shows individual and mean ± SD percent of optical density (OD) for ubiquitinated (Ubiq) C-cadherin band normalized with full-length C-cadherin and compared to controls. In ( a , b ), * p < 0.05, ** p < 0.01, two-tailed ratio t -test, n = 16 and 24 neural plates for Control and FOLR1 KD groups respectively, N = 3 independent experiments. Source data are provided as a Source Data file.

Article Snippet: IP/Western blot antibodies were rabbit anti- Xenopus laevis CD2AP polyclonal affinity purified antibody raised against the peptide CRPKSEVEPHSKTKT custom made by GenScript and anti- Xenopus laevis FOLR1 antibody (GenScript).

Techniques: Control, Incubation, Western Blot, Immunoprecipitation, Ubiquitin Proteomics, Two Tailed Test

Journal: Nature Communications

Article Title: Noncanonical function of folate through folate receptor 1 during neural tube formation

doi: 10.1038/s41467-024-45775-1

Figure Lengend Snippet: a Neural plate stage Xenopus laevis embryos were processed for co-immunoprecipitation (IP) assays. Example of Western blot assay from immunoprecipitates with FOLR1 or GFP (control) antibodies and probed for CD2AP or FOLR1. Similar results were observed in N = 3 independent experiments. b Neural plate stage Xenopus laevis embryos were fixed and processed for immunostaining. Images are transverse single z-sections of immunostained neural plate showing apical colocalization of phospho-CD2AP (p-CD2AP) and p-c-Cbl with C-cadherin. Scale bar, 10 μm. Similar results were observed in N = 3 independent experiments. c Two-cell stage Xenopus laevis embryos were bilaterally microinjected with 9.9 pmol of Control-morpholino (Control, Control-MO), 2.6 pmol CD2AP-MO1 (CD2AP KD1) or 7.4–9.9 pmol CD2AP-MO2 (CD2AP KD2/KD) per blastomere until neural tube closed in control embryos, when they were fixed and photomicrographed. Examples of whole embryos in each group. Arrowheads indicate open neural tube (neural tube defect, NTD). Numbers are embryos presenting closed (green) or open (purple, NTD) neural tube. Bar graph represents proportion of phenotypes in each group. d Two-cell stage Xenopus laevis embryos were unilaterally microinjected with 9.9 pmol Control-MO (Control) and 7.4–9.9 pmol CD2AP-MO2 (CD2AP KD) along with GFP and mCherry mRNA, respectively, and allowed to develop until they reached mid-neural plate stages, when they were fixed and processed for immunostaining. Image is a transverse section of the neural plate, immunostained for GFP (Control), mCherry (CD2AP KD) and C-cadherin. Double arrows indicate apical surface length of medial superficial Control (white) and CD2AP KD (magenta) neural plate cells. Scale bar, 20 μm. Graph shows individual and mean ± SD apical length of superficial neural plate cells per embryo, n of cells = 75 in each half of the neural plate, N of embryos = 4. **** p < 0.0001, two-tailed paired t -test. Source data are provided as a Source Data file.

Article Snippet: IP/Western blot antibodies were rabbit anti- Xenopus laevis CD2AP polyclonal affinity purified antibody raised against the peptide CRPKSEVEPHSKTKT custom made by GenScript and anti- Xenopus laevis FOLR1 antibody (GenScript).

Techniques: Immunoprecipitation, Western Blot, Control, Immunostaining, Two Tailed Test

Journal: Nature Communications

Article Title: Noncanonical function of folate through folate receptor 1 during neural tube formation

doi: 10.1038/s41467-024-45775-1

Figure Lengend Snippet: a Two-cell stage Xenopus laevis embryos were bilaterally microinjected with hEEA1-GFP and membrane mCherry mRNAs and unilaterally microinjected with 9.9 pmol CD2AP-MO (CD2AP KD) per blastomere along with fluorescent tracer and allowed to develop until they reached early neural plate stages (stage 13-14), when they were time-lapse imaged with an acquisition rate of 1 frame/6 min. Image is maximum intensity projection of single time frame. Dashed line indicates border between morpholino-injected and wild-type (WT) neural plate. Inset shows neural plate injected side showing tracer in blue. Graphs show distribution between both halves of the neural plate (in %) of the number of EEA1-GFP vesicles and area fraction of labeled endosomes per neural plate cell surface. Two-tailed paired t -test, n = 28 cells analyzed in each group from N = 5 embryos per group. Scale bar, 20 μm. b Two-cell stage Xenopus laevis embryos were bilaterally microinjected with 7.4 pmol Control-MO (Control) or CD2AP-MO (CD2AP KD) per blastomere and allowed to grow until they reached mid-neural plate stages (stage 15–17) when neural plate was dissected and processed for Western blot assays. Image is an example of Western blot assay. Graph shows individual and mean ± SD percent of optical density (OD) for C-cadherin immunoblot band normalized with GAPDH protein band OD and compared to controls. Two-tailed ratio t -test, n = 28 and 24 neural plates for Control and CD2AP KD groups, respectively, N = 5 independent experiments. In ( a , b ), * p < 0.05, ** p < 0.01, *** p < 0.001. Source data are provided as a Source Data file.

Article Snippet: IP/Western blot antibodies were rabbit anti- Xenopus laevis CD2AP polyclonal affinity purified antibody raised against the peptide CRPKSEVEPHSKTKT custom made by GenScript and anti- Xenopus laevis FOLR1 antibody (GenScript).

Techniques: Membrane, Injection, Labeling, Two Tailed Test, Control, Western Blot

Journal: Nature Communications

Article Title: Noncanonical function of folate through folate receptor 1 during neural tube formation

doi: 10.1038/s41467-024-45775-1

Figure Lengend Snippet: Two-cell stage Xenopus laevis embryos were microinjected with 14.8 pmol Control-morpholino (MO, Control, a , b ), 3.2 pmol FOLR1-MO (FOLR1 KD, a ) or 14.8 pmol CD2AP-MO2 (CD2AP KD, b ) per embryo and incubated with saline or proteasome and lysosome inhibitors at the end of gastrulation (stage 12) until neural plate stages (stage 17) when they were processed for Western blot assays. Images are examples of Western blot assays. Graphs show individual and mean ± SD percent of optical density (OD) for CD2AP ( a ) or FOLR1 ( b ) immunoblot band normalized with GAPDH protein band OD and compared to controls. In ( a ), n = 34 and 42 neural plates for Control and FOLR1 KD, respectively, N = 7 independent experiments; n = 20 and 26 neural plates for Control+inhibitors and FOLR1 KD+inhibitors groups, respectively, N = 3 independent experiments. In ( b ) n = 16 and 20 for Control and CD2AP KD groups, respectively and n = 16 and 18 neural plates for Control+inhibitors and CD2AP KD+inhibitors, respectively, N = 3 independent experiments. In ( a , b ) * p < 0.05, *** p < 0.001, ns: not significant, two-tailed ratio t -test. Source data are provided as a Source Data file.

Article Snippet: IP/Western blot antibodies were rabbit anti- Xenopus laevis CD2AP polyclonal affinity purified antibody raised against the peptide CRPKSEVEPHSKTKT custom made by GenScript and anti- Xenopus laevis FOLR1 antibody (GenScript).

Techniques: Control, Incubation, Saline, Western Blot, Two Tailed Test

Journal: Nature Communications

Article Title: Noncanonical function of folate through folate receptor 1 during neural tube formation

doi: 10.1038/s41467-024-45775-1

Figure Lengend Snippet: a – c Neural plate from mid neural plate stage Xenopus laevis embryos was dissected and dissociated cells plated in vitro. After 2 h, cells were loaded with the Ca 2+ sensor Fluo4-AM and time-lapse imaged. a Example of 1-h recording of neural plate cell Ca 2+ activity. b , c Folinic acid ( b , c ), folic acid ( c ) or vehicle was added to neural plate cells in culture during time-lapse imaging and the Ca 2+ response was recorded in the first minute post addition. b Example of acute transient elicited by 100 μM folinic acid. c Graph shows mean ± SEM folinic- or folic acid-responsive neural plate cells compared to total number of cells with spontaneous Ca 2+ transients in 30 min recording, N = 3 independent experiments. Two-tailed one sample t and Wilcoxon test. d Two-cell stage embryos were bilaterally microinjected with GCaMP6s mRNA and grown until early and mid-neural plate stages when they were time-lapse imaged before and after addition of vehicle or 300 μM folinic acid. Image shows example of embryo with cells exhibiting Ca 2+ transients indicated with circles. Graph shows individual and mean ± SD percent change in Ca 2+ transient frequency before and after addition of vehicle or folinic acid, n = 4, 5, 6 and 7 embryos for Early-Vehicle, Early-Folinic acid, Mid-Vehicle and Mid-Folinic acid groups, respectively. One-sample two-tailed t -test, compared to hypothetical value of 100%. e – h Two-cell stage embryos were bilaterally microinjected with GCaMP6s mRNA ( e – h ) and unilaterally microinjected with 9.9 pmol FOLR1-MO1 (FOLR1 KD1/KD) or 1.6 pmol FOLR1-MO2 (FOLR1 KD2) per blastomere ( e ) and grown until mid-neural plate stages when they were time-lapse imaged. Image in ( e ) shows example of embryo with cells exhibiting Ca 2+ transients indicated with circles in WT and FOLR1 KD1 halves. Graphs show individual Ca 2+ transient frequency (transients/5 min) in WT and FOLR1 KD1 or KD2 halves ( e , n = 6 embryos) and in WT embryos before and after addition of vehicle ( f , n = 7 embryos), 50 μM folic acid ( g , n = 6 embryos), Na + and voltage-gated Ca 2+ channel blockers (VGC block : 0.02% tricaine+10 μM nitrendipine+25 μM TTA-2, h , n = 5 embryos), or a mix of folic acid and VGC block ( h , n = 5 embryos). Two-tailed paired t -test ( e – g ) and 1-way ANOVA-Tukey multiple comparisons test ( h ). In ( c – h ), * p < 0.05, ** p < 0.01, *** p < 0.001, **** p < 0.0001, ns: not significant. i Model of FOLR1 and CD2AP regulation of neural tube formation. Source data are provided as a Source Data file.

Article Snippet: IP/Western blot antibodies were rabbit anti- Xenopus laevis CD2AP polyclonal affinity purified antibody raised against the peptide CRPKSEVEPHSKTKT custom made by GenScript and anti- Xenopus laevis FOLR1 antibody (GenScript).

Techniques: In Vitro, Activity Assay, Imaging, Two Tailed Test, Blocking Assay