Journal: PLOS One
Article Title: Combining lenalidomide with IL-2 family of cytokines enhances activating receptor and perforin/granzyme expression in NK cells
doi: 10.1371/journal.pone.0344471
Figure Lengend Snippet: (a) . Concentration of cytokines secreted in the supernatants of isolated NK cells treated with 20μM lenalidomide (LEN) or vehicle measured at 1, 3 or 6 days of culture using a cytometric bead array. (b) Primary NK cells cultured in 10μM lenalidomide or DMSO for 7 days followed by pulsing with K562 tumor targets at a 1:1 ratio for 5 hours prior to staining for CD107 granule mobilization or IFN-γ activation by flow. Lysis of K562 targets cells as in “b” by either (c) PBMC (effector to target ratio 10:1), ( d ) isolated NK cells, or ( Supplemental Fig. 4b ) YT cells as effectors cultured in the presence or absence of 20μM lenalidomide, or DMSO, with or without hrIL-2 (100U/mL) 7 days after pulsing (effector to target ratio 10:1). (e) Lysis of 721.221 targets cells as in “d” in the presence of 20μM lenalidomide, or DMSO for 7 days after pulsing (effector to target ratio 5:1). (f) NK cells cultured as in “a” to measure the mRNA expression of Perforin (PRF1) and Granzyme B (GZMB) by q-PCR. Values were calculated by the ΔΔCt method with control (DMSO) as the experimental control and the housekeeping gene ACTB as the internal control. (g) Immunohistochemistry of perforin and granzyme B of isolated primary NK cells treated with lenalidomide, IL-2, IL-15 or their combination as shown. Quantification of mean fluorescence intensity (MFI) of ( h ) granzyme and ( i ) perforin immunostaining (n = 4) from representative figure shown in . In all experiments in this figure, error bars represent the SEM of the mean and p-value was calculated by paired student t test (a and e) or ordinary one-way ANOVA with multiple comparisons (b, c and d) .
Article Snippet: Lenalidomide (cat# S1029, Selleckchem, Houston, Texas, United States) was dissolved first in dimethyl sulfoxide (DMSO, cat# D2650, Sigma-Aldrich, St. Louis, Missouri, United States) at a 10mM concentration and aliquots frozen at -80 o C until ready to use.
Techniques: Concentration Assay, Isolation, Cell Culture, Staining, Activation Assay, Lysis, Expressing, Control, Immunohistochemistry, Fluorescence, Immunostaining