PI3K
The first PI3K gene to be cloned was S. cerevisiae Vps34, which is required for vacuolar protein sorting in yeast and is the only PI3K gene in that organism. Mammals express four class I catalytic isoforms (p110α, β, γ, and δ encoded by PIK3CA, PIK3CB, PIK3CG, and PIK3CD) that catalyze the phosphorylation of PtdIns-4,5-P2 to generate PtdIns-3,4,5-P3 Human cells express three classes of PI3K enzymes, there are three class II PI3Ks (PI3K-C2α, β, γ) and a single class III PI3K (hVPS34). PI3Ks are capable of being activated by receptor-coupled tyrosine kinase activities, small Ras-related GTPases, and heterotrimeric G proteins. Each class I isoform has a domain that interacts with members of the Ras GTPase superfamily PI3K signaling is evolutionarily conserved among multicellular organisms as a mechanism to respond to external growth cues.
In mammals PI3K signaling is activated downstream of a myriad of growth factor receptors, including PDGF receptor (PDGFR) and epidermal growth factor receptor (EGFR), which drive proliferation and migration, insulin-like growth factor receptor (IGFR) which stimulates growth and survival, and insulin receptor (INSR) which regulates metabolic homeostasis. To coordinate responses to extracellular queues, the effectors of PI3K need to alter multiple facets of the cell, e.g. signaling that drives cell cycle progression also generates increased demand for metabolic programs to produce the energy and macromolecular synthesis to support cell growth and mitotic cell division. The recognition that PI3K signaling was aberrantly activated in the majority of human cancers, together with the presence of actionable target proteins in the PI3K/mTOR network, spurred expectations that PI3K/mTOR pathway inhibitors would spawn a major paradigm shift in cancer therapy.
References
1.Fruman DA, et al. Cell. 2017;170(4):605–635.
In mammals PI3K signaling is activated downstream of a myriad of growth factor receptors, including PDGF receptor (PDGFR) and epidermal growth factor receptor (EGFR), which drive proliferation and migration, insulin-like growth factor receptor (IGFR) which stimulates growth and survival, and insulin receptor (INSR) which regulates metabolic homeostasis. To coordinate responses to extracellular queues, the effectors of PI3K need to alter multiple facets of the cell, e.g. signaling that drives cell cycle progression also generates increased demand for metabolic programs to produce the energy and macromolecular synthesis to support cell growth and mitotic cell division. The recognition that PI3K signaling was aberrantly activated in the majority of human cancers, together with the presence of actionable target proteins in the PI3K/mTOR network, spurred expectations that PI3K/mTOR pathway inhibitors would spawn a major paradigm shift in cancer therapy.
References
1.Fruman DA, et al. Cell. 2017;170(4):605–635.
PI3K/Akt/mTOR signaling
PI3K
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mTOR inhibitor 13
产品货号 : M37620
cas no: 1144075-44-4
mTOR inhibitor-13(化合物 9g)是一种芳基脲基化合物,是一种有效的选择性 mTOR 抑制剂,IC50 为 0.29 nM。mTOR inhibitor-13 还抑制 PI3K-α,IC50 为 119 nM。 -
RLY-2608
产品货号 : M37293
cas no: 2733573-94-7
RLY-2608是首个PI3Ka 选择性变构抑制剂。 -
STX-478
产品货号 : M37154
cas no: 2883540-92-7
STX-478 (化合物 80) 是一种口服有效的、具有血脑屏障透过性的、突变选择性变构 PI3Kα 抑制剂。STX-478 能稳健且持久地使肿瘤消退,可用于癌症的研究。 -
UCL-TRO-1938
产品货号 : M37137
cas no: 2919575-27-0
UCL-TRO-1938 是一种有效的 PI3Kα 变构激活剂,其 EC50 值约为 60 μM。UCL-TRO-1938 可以诱导细胞增殖,具有心脏保护和神经再生的作用。 -
PI5P4Ks-IN-2
产品货号 : M36403
cas no: 2766854-03-7
PI5P4Ks-IN-2 是磷脂酰肌醇 5-磷酸 4-激酶 PI5P4Kγ 的抑制剂。PI5P4Ks-IN-2 靶向 PI5P4K 亚型,pIC50 值分别 <4.3 (PI5P4Kα)、<4.6 (PI5P4Kβ)、6.2 (PI5P4Kγ)、0.32 (PI5P4Kγ+)。