Journal: bioRxiv
Article Title: ERBB4-mediated signaling is a mediator of resistance to BTK and PI3K inhibitors in B cell lymphoid neoplasms
doi: 10.1101/2023.01.01.522017
Figure Lengend Snippet: (A) Expression of surface ERBB4 by FACS in parental (grey) and resistant (red) lines. Dashed black line for negative control (neg-cnt). Data derived from two independent experiments. (B) Secretion of HBEGF in parental (grey) and resistant (red) by ELISA. Data derived from three independent experiments. (C) Expression levels of surface CD19 (x-axis, PE-conjugated) and intracellular HBEGF (y-axis, APC-conjugated) by FACS in parental (left) and resistant (right) cells, percentage correspond to percentages of total viable cells. Data representative of two independent experiments. (D) Levels of protein phosphorylation by immunoblot in parental (grey) and resistant (red) cells. Values correspond to average of protein quantification normalized to GAPDH levels in three independent experiments. Error bars represent standard error of the mean. (E) Quantification of AKT phosphorylation by immunofluorescence, error bars represent standard error of the mean. Data derived from at least three independent experiments. P values from t-test, statistically significant for p< 0.05. (E) Detail of p-AKT expression by immunofluorescence in parental (PAR, top) and resistant (RES, bottom) upon DMSO (control, left) or 1μM idelalisib (right). (G) Cell viability by MTT assay of parental cells (PAR, black line) exposed to idelalisib in presence or not of conditioned medium from Karpas1718 idelalisib-resistant (RES, red line), cultured for 48h, PAR + RES-cond RPMI, dashed black line) or stimulated with 30ng/ml of recombinant HBEGF (dashed red line). Data derived from the average of three independent experiments. P values from a moderated t-test, statistically significant for p< 0.05.
Article Snippet: ELISA (Human HB-EGF Quantikine ELISA Kit, R&D Systems) was performed according to the manufacturer’s protocols.
Techniques: Expressing, Negative Control, Derivative Assay, Enzyme-linked Immunosorbent Assay, Phospho-proteomics, Western Blot, Immunofluorescence, Control, MTT Assay, Cell Culture, Recombinant