1. Signaling Pathways
  2. Protein Tyrosine Kinase/RTK
  3. Syk

Syk

Spleen tyrosine kinase

Syk (Spleen tyrosine kinase) is a cytosolic non-receptor protein tyrosine kinase (PTK) that is expressed at high levels, both in hematopoietic cells (such as mast cells, B lymphocytes, T lymphocytes, neutrophils, dendritic cells, and macrophages) and in non-hematopoietic cells.

Syk mediates key signal transduction pathways following the activation of immune cell receptors. Syk associates with different receptors on the surface of various cells such as B cells, mast cells, monocytes, macrophages, and neutrophils, and even osteoclasts and breast cancer cells. Following the engagement of these receptors with their ligands, SYK is activated and orchestrates diverse cellular responses, including cytokine production (in T cells and monocytes) and phagocytosis (in macrophages).

Syk Related Products (43):

Cat. No. Product Name Effect Purity
  • HY-13038A
    Fostamatinib
    Inhibitor 99.50%
    Fostamatinib (R788) is the oral prodrug of the active compound R406. R406 is an orally available and competitive Syk/FLT3 inhibitor with a Ki of 30 nM and an IC50 of 41 nM. R406 also inhibits Lyn (IC50=63 nM) and Lck (IC50=37 nM).
  • HY-12067
    R406
    Inhibitor 98.72%
    R406 is an orally available and competitive Syk/FLT3 inhibitor for ATP binding with a Ki of 30 nM, potently inhibits Syk kinase activity in vitro with an IC50 of 41 nM, measured at an ATP concentration corresponding to its Km value. R406 reduces immune complex-mediated inflammation. R406 also inhibits Lyn (IC50=63 nM) and Lck (IC50=37 nM).
  • HY-13518
    Piceatannol
    Inhibitor 98.09%
    Piceatannol is a well-known Syk inhibitor and reduces the expression of iNOS induced by TNF. Piceatannol is an effective agent for research of acute lung injury (ALI). Piceatannol is a naturally occurring polyphenolic stilbene found in various fruits and vegetables and exhibits anticancer and anti-inflammatory properties. Piceatannol induces apoptosis in DLBCL cell lines. Piceatannol induces autophagy and apoptosis in MOLT-4 human leukemia cells.
  • HY-15968
    Entospletinib
    Inhibitor 99.88%
    Entospletinib (GS-9973) is an orally bioavailable, selective Syk inhibitor with an IC50 of 7.7 nM.
  • HY-15999
    Cerdulatinib
    Inhibitor 99.0%
    Cerdulatinib (PRT062070) is a selective Tyk2 inhibitor with an IC50 of 0.5 nM. Cerdulatinib (PRT062070) also is a dual JAK and SYK inhibitor with IC50s of 12, 6, 8 and 32 for JAK1, 2, 3 and SYK, respectively.
  • HY-112809
    GSK2646264
    Inhibitor 98.39%
    GSK2646264 (Compound 44) is a potent and selective spleen tyrosine kinase (SYK) inhibitor with a pIC50 of 7.1. GSK2646264 also inhibits other kinases with pIC50 values of 5.4, 5.4, 5.3, 5, 4.5, <4.6 and <4.3 against LCK, LRRK2, GSK3β, JAK2, VEGFR2, Aurora B and Aurora A, respectively. GSK2646264 is penetrable into the epidermis and dermis of the skin.
  • HY-151634
    Syk-IN-6
    Inhibitor
    Syk-IN-6 is an inhibitor of the lipid-SH2 domain interaction, control the cellular activity of kinases containing SH2 domain. Syk-IN-6 blocks Syk kinase activity, which associated hematopoietic malignancies, including acute myeloid leukemia (AML).
  • HY-112390B
    Syk Inhibitor II dihydrochloride dihydrate
    Inhibitor
    Syk Inhibitor II dihydrochloride dihydrate is a potent, high selective and ATP-competitive Syk inhibitor with an IC50 of 41 nM. Syk Inhibitor II dihydrochloride dihydrate inhibits 5-HT release from RBL-cells with an IC50 of 460 nM. Syk Inhibitor II dihydrochloride dihydrate shows less potent against other kinases and has anti-allergic effect.
  • HY-15323
    PRT062607 Hydrochloride
    Inhibitor 98.68%
    PRT062607 Hydrochloride (P505-15 Hydrochloride) is a highly specific and potent inhibitor of purified Syk (IC50 1-2 nM).
  • HY-11108
    R406 free base
    Inhibitor 99.69%
    R406 free base is an orally available and competitive Syk/FLT3 inhibitor for ATP binding with a Ki of 30 nM, potently inhibits Syk kinase activity in vitro with an IC50 of 41 nM, measured at an ATP concentration corresponding to its Km value. R406 free base reduces immune complex-mediated inflammation. R406 free base also inhibits Lyn (IC50=63 nM) and Lck (IC50=37 nM).
  • HY-14985
    BAY 61-3606 dihydrochloride
    Inhibitor 98.37%
    BAY 61-3606 dihydrochloride is an orally available, ATP-competitive, reversible and highly selective Syk inhibitor with a Ki of 7.5 nM an IC50 of 10 nM. BAY 61-3606 dihydrochloride reduces ERK1/2 and Akt phosphorylation in neuroblastoma cell. BAY 61-3606 dihydrochloride induces a large decrease of Syk phosphorylation in K-rn cell lysates. Bay 61-3606 dihydrochloride sensitizes TRAIL-induced apoptosis by downregulating Mcl-1 in breast cancer cells.
  • HY-109091
    Lanraplenib
    Inhibitor 98.22%
    Lanraplenib (GS-9876) is a highly selective and orally active SYK inhibitor (IC50=9.5 nM) in development for the treatment of inflammatory diseases. Lanraplenib (GS-9876) inhibits SYK activity in platelets via the glycoprotein VI (GPVI) receptor without prolonging bleeding time (BT) in monkeys or humans.
  • HY-13038
    Fostamatinib Disodium
    Inhibitor 99.88%
    Fostamatinib Disodium (R788 Disodium) is the oral prodrug of the active compound R406. R406 is an orally available and competitive Syk/FLT3 inhibitor with a Ki of 30 nM and an IC50 of 41 nM. R406 also inhibits Lyn (IC50=63 nM) and Lck (IC50=37 nM).
  • HY-12974
    PRT-060318
    Inhibitor 99.36%
    PRT-060318 (PRT318) is a novel selective inhibitor of the tyrosine kinase Syk with an IC50 of 4 nM.
  • HY-103018
    Gusacitinib
    Inhibitor 99.41%
    Gusacitinib (ASN-002) is an orally active and potent dual inhibitor of spleen tyrosine kinase (SYK) and janus kinase (JAK) with IC50 values of 5-46 nM. Gusacitinib has anti-cancer activity in both solid and hematological tumor types.
  • HY-15999A
    Cerdulatinib hydrochloride
    Inhibitor 99.54%
    Cerdulatinib hydrochloride (PRT062070) is a selective, oral active and reversible ATP-competitive inhibitor of dual SYK and JAK, with IC50s of 32 nM, 0.5 nM, 12 nM, 6 nM and 8 nM for SYK and Tyk2, JAK1, 2, 3, respectively. Cerdulatinib hydrochloride could be used to research autoimmune disease and B-cell malignancies.
  • HY-16420
    R112
    Inhibitor 99.23%
    R112 is a fast and reversible inhibitor of spleen tyrosine kinase (Syk) kinase. R112 inhibits Syk kinase activity with an IC50 value of 226 nM and a Ki value of 96 nM. R112 inhibits IgE-FcεRI signaling pathway. R112 can be used for the research of allergic rhinitis.
  • HY-100867A
    TAK-659 hydrochloride
    Inhibitor 99.91%
    TAK-659 hydrochloride is a highly potent, selective, reversible and orally available dual inhibitor of spleen tyrosine kinase (SYK) and fms related tyrosine kinase 3 (FLT3), with an IC50 of 3.2 nM and 4.6 nM for SYK and FLT3, respectively. TAK-659 hydrochloride induces cell death in tumor cells but not in nontumor cells, and with potential for the treatment of chronic lymphocytic leukemia (CLL).
  • HY-112390A
    Syk Inhibitor II
    Inhibitor 98.05%
    Syk Inhibitor II is a potent, high selective and ATP-competitive Syk inhibitor with an IC50 of 41 nM. Syk Inhibitor II inhibits 5-HT release from RBL-cells with an IC50 of 460 nM. Syk Inhibitor II shows less potent against other kinases and has anti-allergic effect.
  • HY-13038B
    Fostamatinib disodium hexahydrate
    Inhibitor 99.73%
    Fostamatinib (R788) disodium hexahydrate is the oral prodrug of the active compound R406. R406 is an orally available and competitive Syk/FLT3 inhibitor with a Ki of 30 nM and an IC50 of 41 nM. R406 also inhibits Lyn (IC50=63 nM) and Lck (IC50=37 nM).