1. Signaling Pathways
  2. PI3K/Akt/mTOR
  3. PI3K

PI3K (磷脂酰肌醇3-激酶)

PI3K (Phosphoinositide 3-kinase), via phosphorylation of the inositol lipid phosphatidylinositol 4,5-bisphosphate (PI(4,5)P2), forms the second messenger molecule phosphatidylinositol (3,4,5)-trisphosphate (PI(3,4,5)P3) which recruits and activates pleckstrin homology domain containing proteins, leading to downstream signalling events crucial for proliferation, survival and migration. Class I PI3K enzymes consist of four distinct catalytic isoforms, PI3Kα, PI3Kβ, PI3Kδ and PI3Kγ.

There are three major classes of PI3K enzymes, being class IA widely associated to cancer. Class IA PI3K are heterodimeric lipid kinases composed of a catalytic subunit (p110α, p110β, or p110δ; encoded by PIK3CA, PIK3CB, and PIK3CD genes, respectively) and a regulatory subunit (p85).

The PI3K pathway plays an important role in many biological processes, including cell cycle progression, cell growth, survival, actin rearrangement and migration, and intracellular vesicular transport.

PI3K 亚型特异性产品:

  • PI3Kα

  • PI3Kβ

  • PI3Kγ

  • PI3Kδ

  • PI3KC2α

  • PI3KC2β

  • Vps34

  • PI3K

  • p120γ

目录号 产品名 作用方式 纯度
  • HY-19312
    3-Methyladenine Inhibitor ≥98.0%
    3-Methyladenine (3-MA) 是 PI3K 的抑制剂。它通过抑制class III PI3K广泛作为自噬 (autophagy) 的抑制剂使用。
  • HY-10108
    LY294002 Inhibitor ≥98.0%
    LY294002 是一种广谱 PI3K 抑制剂,抑制 PI3Kα, PI3KδPI3KβIC50 分别为 0.5, 0.57, 0.97 μM。LY294002 也可抑制 CK2 的活性,IC50 为 98 nM。LY294002 是一种竞争性 DNA-PK 抑制剂,可逆结合 DNA-PK 的激酶结构域,IC50 为 1.4 μM。LY294002 是一种自噬 (autophagy) 和凋亡 (apoptosis) 激活剂。
  • HY-10197
    Wortmannin Inhibitor ≥98.0%
    Wortmannin (SL-2052) 是一种有效的,不可逆的,选择性PI3K 抑制剂,IC50 值为 3 nM。Wortmannin (SL-2052) 阻断自噬 (autophagy) 形成,并有效抑制 Polo-like kinase 1 (PlK1)Plk3IC50 值分别为 5.8 和 48 nM。
  • HY-18085
    Quercetin Inhibitor ≥98.0%
    Quercetin 是一种天然黄酮类化合物,可激活或抑制许多蛋白质的活性。Quercetin 可激活 SIRT1,也可抑制 PI3K,抑制 PI3Kγ,PI3Kδ,PI3Kβ 的 IC50 分别为 2.4 μM, 3.0 μM, 5.4 μM。
  • HY-P0175
    740 Y-P Activator 99.67%
    740 Y-P (740YPDGFR; PDGFR 740Y-P) 是一个有效的,具有细胞渗透性的 PI3K 激活剂。740 Y-P 很容易结合含有 p85 的 N- 和 C- 末端 SH2 结构域的 GST 融合蛋白,但不能单独结合 GST。
  • HY-124719
    hSMG-1 inhibitor 11j Inhibitor 98.91%
    hSMG-1 inhibitor 11j,一种嘧啶衍生物,是有效的和选择性的 hSMG-1 抑制剂,IC50 值为 0.11 nM。hSMG-1 inhibitor 11j 对 hSMG-1 的选择性是 mTOR (IC50=50 nM),PI3Kα/γ (IC50=92/60 nM) 和 CDK1/CDK2 (IC50=32/7.1 μM) 的 455 倍以上。hSMG-1 inhibitor 11j 可用于癌症研究。
  • HY-133907
    NVS-PI3-4 Inhibitor
    NVS-PI3-4 是一种特异性 PI3Kγ 抑制剂。 NVS-PI3-4 可用于过敏,炎症和癌症疾病的研究。
  • HY-118521
    AS-041164 Inhibitor ≥98.0%
    AS-041164 是一种有效的,选择性的,具有口服活性的 PI3Kγ 亚型抑制剂,IC50 为 70 nM。AS-041164 对 PI3Kα,PI3Kβ 和 PI3Kδ 的活性较低 (IC50 分别为 240 nM,1.45 μM 和 1.70 μM)。AS-041164 具有抗炎作用。
  • HY-10115
    PI-103 Inhibitor 99.86%
    PI-103 是一种有效的 PI3K mTOR 抑制剂,抑制 p110αp110βp110δp110γmTORC1mTORC2IC50 分别为 8 nM,88 nM,48 nM,150 nM,20 nM 和 83 nM。PI-103 还抑制 DNA-PK,IC50 为 2 nM。PI-103 诱导自噬 (autophagy)
  • HY-N0776
    Isorhamnetin Inhibitor 99.95%
    Isorhamnetin 是从中草药沙棘 (Hippophae rhamnoides L.) 中提取的类黄酮化合物。Isorhamnetin 可通过直接抑制 MEK1PI3K 来抑制皮肤癌。
  • HY-101625
    Recilisib Activator ≥98.0%
    Recilisib (ON 01210) 是一种辐射防护剂,可以激活细胞中 AKTPI3K 的活性。
  • HY-101920
    Autophinib Inhibitor 99.55%
    Autophinib 是一种有效的,选择性细胞自噬抑制剂,对于饥饿和 Rapamycin 诱导的自噬,IC50 值分别为 90 nM 和 40 nM。Autophinib 还是一种 ATP 竞争性的 VPS34 抑制剂,其 IC50 值为 19 nM。Autophinib 通过靶向 VPS34 来抑制饥饿或 Rapamycin 诱导的细胞自噬。
  • HY-N0728
    α-Linolenic acid Inhibitor ≥99.0%
    α-Linolenic acid 是从种子油中分离的,人体无法合成的必需脂肪酸。α-Linolenic acid 可通过调节 PI3K/Akt 信号传导来影响血栓形成过程。α-Linolenic acid 具有抗心律失常的特性,并且与心血管疾病和癌症等有关。
  • HY-10344
    AZD 6482 Inhibitor 99.29%
    AZD 6482 (KIN-193) 是一种有效的选择性 p110β 抑制剂,IC50 为 0.69 nM。
  • HY-10111
    TG100-115 Inhibitor 99.31%
    TG100-115 是一种选择性的 PI3Kγ/PI3Kδ 抑制剂,IC50 分别为 83 和 235 nM。
  • HY-12068
    PI3K-IN-1 Inhibitor 99.93%
    PI3K-IN-1 (XL-147 derivative 1) 是一种有效的 PI3K 抑制剂,PI3K-IN-1 (25 μM) 可 阻断 PI3K/Akt 信号通路。
  • HY-10114
    TGX-221 Inhibitor ≥98.0%
    TGX-221 是一种高效的、选择性的、细胞膜渗透的 PI3K p110β 抑制剂,常用于癌症研究。
  • HY-14860
    1-Deoxynojirimycin Activator ≥98.0%
    1-Deoxynojirimycin (Duvoglustat) 是一种口服有效的 α-葡萄糖苷酶 (α-glucosidase) 抑制剂。1-Deoxynojirimycin 抑制餐后血糖,预防糖尿病。1-Deoxynojirimycin 具有降血糖、减肥和抗病毒的作用。
  • HY-15477
    YS-49 Activator
    YS-49 是 PI3K/Akt (RhoA 的下游靶标) 的激活剂,可减少 3-甲基胆碱处理的细胞中 RhoA/PTEN 的激活。YS-49 能通过诱导血红素加氧酶 (HO-1) 来抑制血管紧张素 II (Ang II) 刺激 VSMC 细胞的增殖。YS-49 是异喹啉化合物生物碱,因能激活心脏 β-adrenoceptors 而具有强烈的正性肌力作用。
  • HY-10109
    AS-605240 Inhibitor ≥98.0%
    AS-605240 是一种口服有效的特异性 PI3Kγ 抑制剂,IC50 值为 8 nM,Ki 值为 7.8 nM。

Phosphatidylinositol 3 kinases (PI3Ks) are a family of lipid kinases that integrate signals from growth factors, cytokines and other environmental cues, translating them into intracellular signals that regulate multiple signaling pathways. These pathways control many physiological functions and cellular processes, which include cell proliferation, growth, survival, motility and metabolism[1]


In the absence of activating signals, p85 interacts with p110 and inhibits p110 kinase activity. Following receptor tyrosine kinase (RTK) or G protein-coupled receptor (GPCR) activation, class I PI3Ks are recruited to the plasma membrane, where p85 inhibition of p110 is relieved and p110 phosphorylates PIP2 to generate PIP3. The activated insulin receptor recruits intracellular adaptor protein IRS1. Phosphorylation of IRS proteins on tyrosine residues by the insulin receptor initiates the recruitment and activation of PI3K. PIP3 acts as a second messenger which promotes the phosphorylation of Akt at Thr308 by PDK-1. RTK activation can also trigger Ras-Raf-MEK-ERK pathway. Activated Akt, ERK and RSK phosphorylate TSC2 at multiple sites to inhibit TSC1-TSC2-TBC1D7, which is the TSC complex that acts as a GTPase-activating protein (GAP) for the small GTPase RHEB. During inhibition of the TSC complex, GTP-loaded RHEB binds the mTOR catalytic domain to activate mTORC1. Glycogen synthase kinase 3β (GSK-3β) activates the TSC complex by phosphorylating TSC2 at Ser1379 and Ser1383. Phosphorylation of these two residues requires priming by AMPK-dependent phosphorylation of Ser1387. Wnt signaling inhibits GSK-3β and the TSC complex, and thus activates mTORC1. mTORC2 is activated by Wnt in a manner dependent on the small GTPase RAC1. Akt activation contributes to diverse cellular activities which include cell survival, growth, proliferation, angiogenesis, metabolism, and migration. Important downstream targets of Akt are GSK-3, FOXOs, BAD, AS160, eNOS, and mTOR. mTORC1 negatively regulates autophagy through multiple inputs, including inhibitory phosphorylation of ULK1, and promotes protein synthesis through activation of the translation initiation promoter S6K and through inhibition of the inhibitory mRNA cap binding 4E-BP1[1][2][3].


PI3Kδ is a heterodimeric enzyme, typically composed of a p85α regulatory subunit and a p110δ catalytic subunit. In T cells, the TCR, the costimulatory receptor ICOS and the IL-2R can activate PI3Kδ. In B cells, PI3Kδ is activated upon crosslinking of the B cell receptor (BCR). The BCR co-opts the co-receptor CD19 or the adaptor B cell associated protein (BCAP), both of which have YXXM motifs to which the p85α SH2 domains can bind. In lumphocytes, BTK and ITK contribute to the activation of PLCγ and promotes the generation of DAG and the influx of Ca2+, which in turn activate PKC and the CARMA1-, BCL 10- and MALT1 containing (CBM) complex. The resulting NF-κB inhibitor kinase (IKK) activation leads to the phosphorylation and the degradation of IκB, and to the nuclear accumulation of the p50-p65 NF-κB heterodimer. MyD88 is an adapter protein that mediates signal transduction for most TLRs and leads to activation of PI3K[4].



[1]. Thorpe LM, et al. PI3K in cancer: divergent roles of isoforms, modes of activation and therapeutic targeting.Nat Rev Cancer. 2015 Jan;15(1):7-24. 
[2]. Vanhaesebroeck B, et al. PI3K signalling: the path to discovery and understanding.Nat Rev Mol Cell Biol. 2012 Feb 23;13(3):195-203. 
[3]. Fruman DA, et al. The PI3K Pathway in Human Disease.Cell. 2017 Aug 10;170(4):605-635.
[4]. Lucas CL, et al. PI3Kδ and primary immunodeficiencies.Nat Rev Immunol. 2016 Nov;16(11):702-714. 

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