1 Introduction
2 Results and discussion
2.1 PhosphoScan analysis identifies the tyrosine-activated phosphoproteome of MCL cell lines and identifies B-cell receptor signaling as the most active pathway
Protein name | Granta-519 | Jeko-1 | MAVER-1 | Rec-1 | BCR pathway | Kynase |
---|---|---|---|---|---|---|
Cdc2 | 17 | 38 | 16 | 26 | * | |
CDK2 | 10 | 34 | 14 | 18 | * | |
CDK3 | 10 | 33 | 13 | 17 | * | |
Syk | 9 | 19 | 24 | 3 | * | * |
SHIP | 7 | 18 | 10 | 10 | * | |
PAG | 9 | 14 | 4 | 8 | * | |
PRP4 | 3 | 19 | 8 | 2 | * | |
Lyn | 4 | 10 | 9 | 7 | * | * |
Ig-beta | 0 | 22 | 2 | 0 | * | |
Hck | 3 | 8 | 5 | 3 | * | * |
WASP | 2 | 7 | 4 | 3 | * | |
SHP-1 | 4 | 7 | 4 | 1 | * | |
Btk | 0 | 11 | 4 | 1 | * | * |
cofilin 1 | 2 | 7 | 5 | 1 | ||
SgK223 | 6 | 1 | 4 | 4 | * | |
LANP-L | 0 | 6 | 5 | 3 | ||
PKCD | 4 | 3 | 2 | 4 | * | * |
GCET2 | 5 | 7 | 1 | 0 | * | |
HSP90B | 5 | 5 | 0 | 2 | ||
GSK3A | 2 | 3 | 4 | 3 | * | * |
GSK3B | 2 | 3 | 4 | 3 | * | * |
p38-alpha | 2 | 3 | 6 | 1 | * | * |
hnRNP A1 | 5 | 2 | 3 | 1 | ||
GRF-1 | 1 | 4 | 2 | 4 | ||
SPTBN1 | 0 | 5 | 4 | 1 | ||
SPTBN1 iso2 | 0 | 5 | 4 | 1 | ||
PLCG2 | 2 | 4 | 3 | 0 | * | |
DYRK1A | 1 | 4 | 3 | 1 | * | |
Lck | 4 | 2 | 1 | 2 | * | * |
HSP90A | 2 | 4 | 1 | 1 | ||
Blk | 2 | 3 | 2 | 1 | * | * |
IRAP | 1 | 4 | 3 | 0 | ||
DDX3 | 4 | 3 | 0 | 0 | ||
PL10 | 4 | 3 | 0 | 0 | ||
Cbl-b | 1 | 3 | 1 | 1 | * | |
BCAP | 1 | 4 | 1 | 0 | ||
Dok3 | 0 | 6 | 0 | 0 | * | |
ANXA2 | 1 | 2 | 2 | 1 | ||
VIM | 2 | 2 | 2 | 0 | ||
L-plastin | 0 | 4 | 2 | 0 | ||
ENO1 | 0 | 2 | 2 | 2 | ||
PIK3R1 | 1 | 2 | 2 | 1 | * | * |
DYRK1B | 1 | 2 | 2 | 1 | * | |
Src | 1 | 2 | 1 | 2 | * | * |
Fyn | 1 | 2 | 1 | 2 | * | * |
Yes | 1 | 2 | 1 | 2 | * | |
hnRNP 2H9 | 2 | 3 | 1 | 0 | ||
hnRNP U | 2 | 3 | 1 | 0 | ||
hnRNP U iso2 | 2 | 3 | 1 | 0 | ||
PAI-RBP1 | 2 | 2 | 2 | 0 |
2.2 The presence of active B-cell receptor signaling is validated in MCL cell lines and tissues
2.3 Inhibition of Syk induces apoptosis in MCL cell lines
2.4 Inhibition of Syk down-regulates Cyclin D1 protein levels
2.5 Piceatannol-induced apoptosis involves the activation of the intrinsic pathway, and is accompanied by the modification of several regulators of cell cycle and apoptosis
2.6 Piceatannol induces complex modifications of the Syk phosphorylation pattern and alterations of downstream effectors of the B-cell receptor pathway
3 Conclusions
4 Methods
Primary antibody | Clone | Source | Dilution | Use |
---|---|---|---|---|
Bax | Polyclonal | Cell Signaling | 1:1000 | Western blotting |
Bcl-xL | 54H6 | Cell Signaling | 1:1000 | Western blotting |
Bcl-2 | 124 | DakoCytomation | 1:4000 | Western blotting |
Caspase 9 | Polyclonal | Cell Signaling | 1:1000 | Western blotting |
Cyclin D1 | SP4 | LabVision | 1:1000 | Western blotting |
p21 | SX118 | DakoCytomation | 1:200 | Western blotting |
p27 | SX53G8 | DakoCytomation | 1:200 | Western blotting |
p53 | DO-7 | Novocastra | 1:500 | Western blotting |
Syk | Polyclonal | Cell Signaling | 1:1000 | Western blotting |
P-Syk (Y525/526) | C87C1 | Cell Signaling | 1:200 | Western blotting |
Stat3 | 124H6 | Cell Signaling | 1:4000 | Western blotting |
P-Stat3(Y705) | D3A7 | Cell Signaling | 1:500 | Western blotting |
PE-P-Syk (Y352) | 17A/P-ZAP70 | BD Biosciences | 1:100 | Flow cytometry |
P-Syk (Y525/526) | Polyclonal | Cell Signaling | 1:100 | Flow cytometry/immunofluorescence |
P-Syk (Y323) | EP573Y | Abcam | 1:100 | Flow cytometry |
P-BLNK (Y84) | J117-1278 | BD Biosciences | 1:100/1:1000 | Flow cytometry/western blotting |
P-Btk (S180) | 3D3 | Cell Signaling | 1:100 | Flow cytometry |
P-Lyn (Y507) | Polyclonal | Cell Signaling | 1:100 | Flow cytometry |
P-Lyn (Y396) | EP503Y | Abcam | 1:100/1:200 | Flow cytometry/western blotting |
P-GSK3α/β (S9/21) | 37F11 | Cell Signaling | 1:100 | Flow cytometry |