PI3Kα
PI3Kα (p110α), encoded by PIK3CA, is a class IA phosphoinositide 3-kinase catalytic subunit that forms a heterodimer with p85 regulatory proteins and catalyzes the phosphorylation of phosphatidylinositol-(4,5)-bisphosphate to generate phosphatidylinositol-(3,4,5)-trisphosphate, thereby regulating cell growth, proliferation, survival, migration, and metabolic signaling[1][2]. Mechanistically, PI3Kα is a central component of the PI3K-AKT-mTOR signaling axis and functions downstream of receptor tyrosine kinases and RAS proteins to amplify intracellular growth and survival pathways[3][4]. Dysregulation of this pathway is among the most common molecular events in human cancer, and activating mutations in PIK3CA promote tumor initiation, progression, and therapeutic resistance through sustained PI3K signaling[3][5]. In disease models, disruption of the RAS-PI3Kα interaction suppresses tumor growth and angiogenesis, highlighting the importance of PI3Kα-dependent signaling in oncogenic processes[4]. Compared with related class I PI3K isoforms, p110α and p110β are broadly expressed across tissues, whereas p110δ is predominantly expressed in leukocytes, indicating distinct physiological functions and therapeutic opportunities among isoforms[6]. Furthermore, PTEN-deficient tumors frequently depend on p110β activity, emphasizing a biologically important distinction between PI3Kα- and PI3Kβ-driven signaling networks[2]. For experimental and translational applications, isoform-selective PI3Kα inhibitors, including alpelisib, have been developed to target PIK3CA-driven malignancies, making PI3Kα a major focus of precision oncology research[5].
References:
- [1]. PI3Kα gene information from NCBI.
- [2]. Mazloumi Gavgani F, et al. Class I Phosphoinositide 3-Kinase PIK3CA/p110α and PIK3CB/p110β Isoforms in Endometrial Cancer. Int J Mol Sci. 2018 Dec 7;19(12):3931. [Content Brief]
- [3]. Wang Y, et al. Oncogenic activation of PIK3CA in cancers: Emerging targeted therapies in precision oncology. Genes Dis. 2024 Sep 10;12(2):101430. [Content Brief]
- [4]. Czyzyk D, et al. Structural insights into isoform-specific RAS-PI3Kα interactions and the role of RAS in PI3Kα activation. Nat Commun. 2025 Jan 9;16(1):525. [Content Brief]
- [5]. 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. [Content Brief]
- [6]. Wikipedia.
- [7]. Wikipedia.
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PI3Kα Related Products (240)
Related Products (240)
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GP262
0 ImagesGP262 is a PI3K/mTOR PROTAC degrader targeting PI3Kγ, PI3Kα and mTOR with DC50 values of 42.23 nM, 227.4 nM and 45.4 nM, respectively in MDA-MB-231 cells. GP262 induces degradation of p110α and p110γ with a DC50 of 227.4 and 42.23 nM. GP262 efficient modulates the PI3K/AKT/mTOR pathway, achieving degradation through the ubiquitin-proteasome system (UPS). GP262 also exhibits robust antiproliferative activity and induces apoptosis in vitro. GP262 exhibits tumor growth suppression capability and biosafety profile. GP262 can be used for leukemia and triple-negative breast cancer (TNBC) .
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Alpelisib (Standard)
0 ImagesSynonyms: BYL-719 (Standard)Alpelisib (BYL-719) (Standard) is the analytical standard of Alpelisib (HY-15244). This product is intended for research and analytical applications. Alpelisib (BYL-719) is an orally active PI3Kα-selective inhibitor that blocks the conversion of PIP2 to PIP3, thereby inhibiting pathways including PI3K/AKT/mTOR, MAPK/ERK, Notch and JAK-STAT. Alpelisib also induces apoptosis, G0/G1 phase arrest and senescence; it significantly inhibits the proliferation, self-renewal, stemness and epithelial-mesenchymal transition (EMT) of tumor cells, reduces cancer stem cell populations and decreases the expression of stem cell markers. Alpelisib not only enhances the sensitivity to Eribulin (HY-13442) and exerts a synergistic effect with Paclitaxel (HY-B0015), but may also induce drug resistance by upregulating the SGK3/GSK3β/β-catenin signaling pathway. Alpelisib can be applied to research related to breast cancer, gastric cancer and lipomas associated with PTEN hamartoma tumor syndrome.
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GNE-490
0 ImagesCat. No.: HY-10812CAS No.: 1033739-92-2GNE-490, a (thienopyrimidin-2-yl)aminopyrimidine, is a potent pan-PI3K inhibitor with IC50s of 3.5 nM, 25 nM, 5.2 nM, 15 nM for PI3Kα, PI3Kβ, PI3Kδ and PI3Kγ, respectively. GNE-490 has >200 fold selectivity for mTOR (IC50=750 nM). GNE-490 shows potent suppression efficacy profile against MCF7.1 breast cancer xenograft model.
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Umbralisib hydrochloride
0 ImagesSynonyms: TGR-1202 hydrochloride; RP5264 hydrochlorideUmbralisib (TGR-1202) hydrochloride is an orally active, potent and selective dual PI3Kδ and casein kinase-1-ε (CK1ε) inhibitor, with EC50 of 22.2 nM and 6.0 μM, respectively. Umbralisib hydrochloride exhibits unique immunomodulatory effects on chronic lymphocytic leukemia (CLL) T cells. Umbralisib hydrochloride can be used for haematological malignancies reseach.
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FD223
0 ImagesFD223 is a potent and selective phosphoinositide 3-kinase delta (PI3Kδ) inhibitor. FD223 displays high potency (IC50=1 nM) and good selectivity over other isoforms (IC50s of 51 nM, 29 nM and 37 nM, respectively for α, β and γ). FD223 exhibits efficient inhibition of the proliferation of acute myeloid leukemia (AML) cell lines by suppressing p-AKT Ser473 thus causing G1 phase arrest during the cell cycle. FD223 has potential for the research of leukemia such as AML.
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CHMFL-PI3KD-317
0 ImagesCHMFL-PI3KD-317 is a highly potent, selective and orally active PI3Kδ inhibitor, with an IC50 of 6 nM, and exhibits over 10-1500 fold selectivity over other class I, II and III PIKK family isoforms, such as PI3Kα (IC50, 62.6 nM), PI3Kβ (IC50, 284 nM), PI3Kγ (IC50, 202.7 nM), PIK3C2A (IC50, >10000 nM), PIK3C2B (IC50, 882.3 nM), VPS34 (IC50, 1801.7 nM), PI4KIIIA (IC50, 574.1 nM) and PI4KIIIB (IC50, 300.2 nM). CHMFL-PI3KD-317 inhibits PI3Kδ-mediated Akt T308 phosphorylation in Raji cells, with an EC50 of 4.3 nM. CHMFL-PI3KD-317 has antiproliferative effects on cancer cells.
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(S)-GSK-F1
0 Images(S)-GSK-F1 (Compound 28) is an inhibitor for type III phosphatidylinositol 4-kinase α (PI4KIIIα). (S)-GSK-F1 inhibits PI4Kα, PI4Kβ, PI4Kγ, PI3Kα, PI3Kβ and PI3Kδ with pIC50 of 8.3, 6.0, 5.6, 5.6, 5.1 and 5.6, respectively. (S)-GSK-F1 exhibits anti-hepatitis C virus (HCV) activity through inhibition of HCV replication. (S)-GSK-F1 exhibits moderate pharmacokinetic characters in rat model.
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PARP/PI3K-IN-1
0 ImagesPARP/PI3K-IN-1 (compound 15) is a potent PARP/PI3K inhibitor with pIC50 values of 8.22, 8.44, 8.25, 6.54, 8.13, 6.08 for PARP-1, PARP-2, PI3Kα, PI3Kβ, PI3Kδ, and PI3Kγ, respectively. PARP/PI3K-IN-1 is a highly effective anticancer compound targeted against a wide range of oncologic diseases.
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PKI-179 hydrochloride
0 ImagesPKI-179 hydrochloride is a potent and orally active dual PI3K/mTOR inhibitor, with IC50s of 8 nM, 24 nM, 74 nM, 77 nM, and 0.42 nM for PI3K-α, PI3K-β, PI3K-γ, PI3K-δ and mTOR, respectively. PKI-179 hydrochloride also exhibits activity over E545K and H1047R, with IC50s of 14 nM and 11 nM, respectively. PKI-179 hydrochloride shows anti-tumor activity in vivo.
