Journal: PLoS ONE

Article Title: Fine-Tuning Roles of Endogenous Brain-Derived Neurotrophic Factor, TrkB and Sortilin in Colorectal Cancer Cell Survival

doi: 10.1371/journal.pone.0025097

Figure Lengend Snippet: (A) Role of endogenous BDNF and its receptor TrkB on CRC cell proliferation: effects of exogenous BDNF and suppressing endogenous TrkB receptor on cell proliferation. The four cell lines were cultured for 24 h in FCS-free medium (FCS 10%, −) in the presence of exogenous BDNF (+), K252a (+) alone or in combination. Cell proliferation was determined by flow cytometry analysis using EdU Alexa Fluor 488. The data are presented as histograms of proliferating cells in relative units ± SEM of five independent experiments. *, p <0.05; **, p <0.01; ***, p <0.001, when compared with serum-free medium. (B, C) Effects of exogenous BDNF and suppressing endogenous TrkB receptor on cell survival. Apoptotic ratios of soluble nucleosomes were detected by ELISA Cell for WiDr, SW480, SW620, and COLO 205 induced by serum deprivation alone (FCS 10%, −) or in association either with exogenous BDNF (+), or with K252a (+), during 24–72 h of serum deprivation. Histograms, mean ratio of apoptotic cells ± SEM of at least three independent experiments. *, p <0.05; **, p <0.01; ***, p <0.001, when compared with serum-free condition alone. (D, E) apoptotic ratio after 24 h serum deprivation alone (0% FCS) or with combination with a neutralizing anti-BDNF mAb (0% anti-BDNF). Histograms, mean ratio of apoptotic cells ± SEM of three independent experiments. *, p <0.05; **, p <0.01; ***, p <0.001, when compared with serum-free condition alone.

Article Snippet: Recombinant human BDNF (100 ng/ml), recombinant pro-BDNF (4 ng/ml), and K252a (200 nM) were purchased from Alomone labs.

Techniques: Cell Culture, Flow Cytometry, Enzyme-linked Immunosorbent Assay

Journal: PLoS ONE

Article Title: Fine-Tuning Roles of Endogenous Brain-Derived Neurotrophic Factor, TrkB and Sortilin in Colorectal Cancer Cell Survival

doi: 10.1371/journal.pone.0025097

Figure Lengend Snippet: (A, B) Sortilin as a coreceptor of p75 NTR . Double staining (yellow) of sortilin (red) and p75 NTR (green) in SW480 cells (A) and SW620 (B) after 24 h of serum deprivation. (C) Colocalization of pro-BDNF and sortilin. Confocal microscopy study of a WiDr cells stained with an anti-pro-BDNF Ab (green) and an anti-sortilin Ab (red), and double staining (yellow) after 24 h of serum deprivation. (D, E) apoptotic ratios after 24 h serum deprivation alone (0% FCS) or combined with recombinant Pro-BDNF (0% Pro-BDNF). Histograms, mean ratio of apoptotic cells ± SEM of three independent experiments. *, p <0.05; **, p <0.01; ***, p <0.001, when compared with serum-free condition alone (0% FCS).

Article Snippet: Recombinant human BDNF (100 ng/ml), recombinant pro-BDNF (4 ng/ml), and K252a (200 nM) were purchased from Alomone labs.

Techniques: Double Staining, Confocal Microscopy, Staining, Recombinant

Journal: PLoS ONE

Article Title: Fine-Tuning Roles of Endogenous Brain-Derived Neurotrophic Factor, TrkB and Sortilin in Colorectal Cancer Cell Survival

doi: 10.1371/journal.pone.0025097

Figure Lengend Snippet: (A) Role of endogenous BDNF and its receptor TrkB on CRC cell proliferation: effects of exogenous BDNF and suppressing endogenous TrkB receptor on cell proliferation. The four cell lines were cultured for 24 h in FCS-free medium (FCS 10%, −) in the presence of exogenous BDNF (+), K252a (+) alone or in combination. Cell proliferation was determined by flow cytometry analysis using EdU Alexa Fluor 488. The data are presented as histograms of proliferating cells in relative units ± SEM of five independent experiments. *, p <0.05; **, p <0.01; ***, p <0.001, when compared with serum-free medium. (B, C) Effects of exogenous BDNF and suppressing endogenous TrkB receptor on cell survival. Apoptotic ratios of soluble nucleosomes were detected by ELISA Cell for WiDr, SW480, SW620, and COLO 205 induced by serum deprivation alone (FCS 10%, −) or in association either with exogenous BDNF (+), or with K252a (+), during 24–72 h of serum deprivation. Histograms, mean ratio of apoptotic cells ± SEM of at least three independent experiments. *, p <0.05; **, p <0.01; ***, p <0.001, when compared with serum-free condition alone. (D, E) apoptotic ratio after 24 h serum deprivation alone (0% FCS) or with combination with a neutralizing anti-BDNF mAb (0% anti-BDNF). Histograms, mean ratio of apoptotic cells ± SEM of three independent experiments. *, p <0.05; **, p <0.01; ***, p <0.001, when compared with serum-free condition alone.

Article Snippet: Recombinant human BDNF (100 ng/ml), recombinant pro-BDNF (4 ng/ml), and K252a (200 nM) were purchased from Alomone labs.

Techniques: Cell Culture, Flow Cytometry, Enzyme-linked Immunosorbent Assay

Journal: PLoS ONE

Article Title: Fine-Tuning Roles of Endogenous Brain-Derived Neurotrophic Factor, TrkB and Sortilin in Colorectal Cancer Cell Survival

doi: 10.1371/journal.pone.0025097

Figure Lengend Snippet: (A, B) Sortilin as a coreceptor of p75 NTR . Double staining (yellow) of sortilin (red) and p75 NTR (green) in SW480 cells (A) and SW620 (B) after 24 h of serum deprivation. (C) Colocalization of pro-BDNF and sortilin. Confocal microscopy study of a WiDr cells stained with an anti-pro-BDNF Ab (green) and an anti-sortilin Ab (red), and double staining (yellow) after 24 h of serum deprivation. (D, E) apoptotic ratios after 24 h serum deprivation alone (0% FCS) or combined with recombinant Pro-BDNF (0% Pro-BDNF). Histograms, mean ratio of apoptotic cells ± SEM of three independent experiments. *, p <0.05; **, p <0.01; ***, p <0.001, when compared with serum-free condition alone (0% FCS).

Article Snippet: Recombinant human BDNF (100 ng/ml), recombinant pro-BDNF (4 ng/ml), and K252a (200 nM) were purchased from Alomone labs.

Techniques: Double Staining, Confocal Microscopy, Staining, Recombinant

Journal: bioRxiv

Article Title: Mutation in the TRKB cholesterol recognition site that blocks antidepressant binding does not influence the basal or BDNF-stimulated activation of TRKB

doi: 10.1101/2022.08.26.505413

Figure Lengend Snippet: (A) The sequence of TRKB transmembrane (TM) domain from rat (UniProt: Q63604, residues 430-453) was mutated at Y433 residue (Y433F) or the entire motif was substituted by the rat sequence of TRKA TM (P35739, residues 419-442). (B) The interaction between biotinylated BDNF (bBDNF) and TRKB is not affected by the TRKB.Y433F mutation or in TRKB/TRKA.TM constructs. (C) TRKB.Y433F does not prevent the BDNF-induced dimerization of TRKB. The constructs used allow the formation of TRKB.wt homodimer or TRKB.wt/Y433F heterodimer. (D , E) Analysis of TRKB phosphorylation shows that, cortical cultures from TRKB.Y433F heterozygous mouse embryos respond to BDNF similarly to the the TRKB.wt littermates, regardless of the tyrosine residue tested ( D : Y515, E : Y816).

Article Snippet: The plates were then washed 3x with PBS buffer, and various concentrations of biotinylated BDNF (Alomone Labs, cat#B-250, 0.1 – 100 pM) was added for 1h at RT.

Techniques: Sequencing, Mutagenesis, Construct