CYH33
目录号 : GC68413CYH33 是一种具有口服活性的，高选择性 PI3Kα 抑制剂，对 α/β/δ/γ 亚型的 IC50 分别为 5.9 nM/598 nM/78.7 nM/225 nM。CYH33 抑制 Akt 和 ERK 的磷酸化，并显着诱导乳腺癌和非小细胞肺癌 (NSCLC) 细胞 G1 期阻滞。CYH33 具有有效的抗实体瘤的活性。
Cas No.:1494684-28-4
Sample solution is provided at 25 µL, 10mM.
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Quality Control & SDS
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- Purity: >96.00%
- COA (Certificate Of Analysis)
- SDS (Safety Data Sheet)
- Datasheet
CYH33 is an orally active, highly selective PI3Kα inhibitor with IC50s of 5.9 nM/598 nM/78.7 nM/225 nM against α/β/δ/γ isoform, respectively. CYH33 inhibits phosphorylation of Akt, ERK and induces significant G1 phase arrest in breast cancer cells and non-small cell lung cancer (NSCLC) cells. CYH33 has potent activity against solid tumors[1][2][3].
CYH33 inhibits cell proliferation with IC50s below 1?μM in 56% (18/32) of the breast cancer cell lines[2].
CYH33 (0.012-1 μM; for 24 hours) significantly arrests T47D and MCF7 cells in G1 phase in a concentration-dependent manner[2].
CYH33 (4-1000 nM; 1 hour) concurrently inhibits phosphorylation of ERK and Akt in both T47D and MCF7 cells[2].
CYH33 (0.11-1 μM; 24 hours) fails to induce apoptosis in MCF7 and MDA-MB-231?cells[2].
Cell Cycle Analysis[2]
| Cell Line: | Sensitive T47D, MCF7 and resistant MDA-MB-231 cells |
| Concentration: | 0.012, 0.037, 0.11, 0.33, 1 μM |
| Incubation Time: | For 24 hours |
| Result: | Arrested T47D and MCF7 cells in G1 phase in a concentration-dependent manner, accompanied with concomitant reduced cell population in S phase. Had little effect on cell cycle distribution in resistant MDA-MB-231?cells. |
Western Blot Analysis[2]
| Cell Line: | Sensitive T47D, MCF7 and resistant MDA-MB-231 cells |
| Concentration: | 4, 12, 37, 111, 333, 1000 nM |
| Incubation Time: | 1 hour |
| Result: | Concurrently inhibited phosphorylation of ERK and Akt in both T47D and MCF7 cells, whereas it had little effect on phosphorylated ERK (pERK) in MDA-MB-231?cells up to 1?μM. |
CYH33 (2-20 mg/kg; oral; once a day for 21 days) potently restrains tumor growth in mice bearing human breast cancer cell xenografts[2].
Single administration of CYH33 (20?mg/kg; oral) significantly down-regulates the level of phosphorylated Akt in tumor tissues, demonstrating the suppression of PI3K signaling in nude mice[2].
CYH33 (10?mg/kg; oral; once a day for 18-d or 20-d respectively) delays the restoration of blood glucose and area under the curve (AUC) of blood glucose increased upon CYH33 treatment in T47D xenografts and R26-Pik3caH1047R;MMTV-Cre mice[2].
| Animal Model: | SCID mice aged 4-6 weeks bearing human breast cancer T47D xenografts[2] |
| Dosage: | 2, 5, 10, 20 mg/kg |
| Administration: | Oral; once a day for 21 days |
| Result: | Displayed marginal inhibitory effect on the tumor growth at lower doses (2 and 5?mg/kg) and significantly attenuated tumor growth at the dose of 10 or 20?mg/kg, yielding T/C values of 58.36% and 49.42% respectively. |
[1]. Haoyue Xiang, et al. Abstract LB-268: Discovery of clinical candidate methyl (5-(6-((4-(methylsulfonyl)piperazin-1-yl)methyl)-4-morpholinopyrrolo[2,1-f][1,2,4]triazin-2-yl)-4-(trifluoromethyl)pyridin-2-yl)carbamate (CYH33) : A highly potent and selective
[2]. Xue-Ling Liu, et al. Decrease in Phosphorylated ERK Indicates the Therapeutic Efficacy of a Clinical PI3Kα-selective Inhibitor CYH33 in Breast Cancer. Cancer Lett. 2018 Oct 1;433:273-282.
[3]. Yuxiang Wang, et al. Simultaneous inhibition of PI3Kα and CDK4/6 synergistically suppresses KRAS-mutated non-small cell lung cancer. Cancer Biol Med. 2019 Feb;16(1):66-83.
| Cas No. | 1494684-28-4 | SDF | Download SDF |
| 分子式 | C24H29F3N8O5S | 分子量 | 598.6 |
| 溶解度 | 储存条件 | Store at -20°C | |
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1 mg | 5 mg | 10 mg |
| 1 mM | 1.6706 mL | 8.3528 mL | 16.7056 mL |
| 5 mM | 0.3341 mL | 1.6706 mL | 3.3411 mL |
| 10 mM | 0.1671 mL | 0.8353 mL | 1.6706 mL |
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PI3Kα inhibitor CYH33 triggers antitumor immunity in murine breast cancer by activating CD8+T cells and promoting fatty acid metabolism
J Immunother Cancer 2021 Aug;9(8):e003093.PMID:34373258DOI:10.1136/jitc-2021-003093.
Background: The phosphatidylinositol 3-kinase (PI3K) is frequently hyperactivated in cancer and plays important roles in both malignant and immune cells. The effect of PI3Kα inhibitors on the tumor microenvironment (TME) remains largely unknown. Here, we investigated the modulation of the TME by a clinical PI3Kα-specific inhibitor CYH33. Methods: The activity of CYH33 against a panel of murine tumors in the immune-competent context or athymic mice was detected. Single-cell RNA sequencing and multi-parameter flow cytometry were performed to determine the immune profiling of TME. The effect of CYH33 on immune cells was conducted with primary murine cells. Results: CYH33 exhibited more potent antitumor activity in immune-competent context. CYH33 enhanced the infiltration and activation of CD8+T and CD4+T cells, while attenuating M2-like macrophages and regulatory CD4+T cells. Increase in memory T cells was confirmed by the induction of long-term immune memory on CYH33 treatment. Mechanistically, CYH33 relieved the suppressed expansion of CD8+T cells via preferential polarization of the macrophages to the M1 phenotype. CYH33 promoted fatty acid (FA) metabolism in the TME, while FA enhanced the activity of CD8+T cells in vitro. The combination of CYH33 with the FA synthase (FASN) inhibitor C75 synergistically inhibited tumor growth with enhanced host immunity. Conclusions: CYH33 induces immune activation and synergizes with FASN inhibitor to further promote the antitumor immunity, which gains novel insights into how PI3K inhibitors exert their activity by modulating TME and provides a rationale for the concurrent targeting of PI3K and FASN in breast cancer treatment.
Adaptive resistance to PI3Kα-selective inhibitor CYH33 is mediated by genomic and transcriptomic alterations in ESCC cells
Cell Death Dis 2021 Jan 14;12(1):85.PMID:33446653DOI:10.1038/s41419-020-03370-4.
Phosphoinositide-3 kinase alpha-specific inhibitors (PI3Kαi) displayed promising potential for the treatment of esophageal squamous cell carcinoma (ESCC) with frequent activation in PI3K signaling. However, acquired resistance is likely to develop and limit the efficacy of PI3Kαi like other targeted therapies. To identify genomic adaptation to PI3Kαi, we applied whole-genome sequencing and detected gene mutation and amplification in four lines of ESCC cells established with adapted resistance to a novel PI3Kαi CYH33. Particularly, HRASG12S mutation was found in KYSE180C cells. Overexpression of HRASG12S in ESCC parental cells rendered resistance to CYH33. By contrast, down-regulation of HRASG12S restored the sensitivity of KYSE180C1 cells to CYH33, and combination of CYH33 and MEK162 displayed synergistic effect against KYSE180C1 cells and xenografts. Furthermore, elevated mTORC1, mitogen-activated protein kinase (MAPK), and c-Myc signaling pathways were found in resistant cells by RNA sequencing and combination of CYH33 and RAD001, MEK162, or OTX015 overcame the resistance to CYH33, which was accompanied with enhanced inhibition on S6, extracellular signal-regulated kinase 1 (ERK), or c-Myc, respectively. Overall, we characterized the adaptations to PI3Kαi in ESCC cells and identified combinatorial regimens that may circumvent resistance.
First-in-human phase Ia study of the PI3Kα inhibitor CYH33 in patients with solid tumors
Nat Commun 2022 Nov 16;13(1):7012.PMID:36385120DOI:10.1038/s41467-022-34782-9.
PIK3CA mutations are highly prevalent in solid tumors. Targeting phosphatidylinositol 3-kinase α is therefore an attractive strategy for treating cancers harboring PIK3CA mutations. Here, we report the results from a phase Ia, open label, dose-escalation and -expansion study (NCT03544905) of CYH33, a highly selective PI3Kα inhibitor, in advanced solid tumors. The primary outcomes were the safety, tolerability, maximum tolerated dose (MTD) and recommended phase 2 dose (RP2D) of CYH33. The secondary outcomes included evaluation of pharmacokinetics, preliminary efficacy and changes in pharmacodynamic biomarkers in response to CYH33 treatment. The exploratory outcome was the relationship between the efficacy of CYH33 treatment and tumor biomarker status, including PIK3CA mutations. A total of 51 patients (19 in the dose escalation stage and 32 in the dose expansion stage) including 36 (70.6%) patients (4 in the dose escalation stage and 32 in the dose expansion stage) with PIK3CA mutations received CYH33 1-60 mg. The MTD of CYH33 was 40 mg once daily, which was also selected as the RP2D. The most common grade 3/4 treatment-related adverse events were hyperglycemia, rash, platelet count decreased, peripheral edema, and fatigue. Forty-two out of 51 patients were evaluable for response, the confirmed objective response rate was 11.9% (5/42). Among 36 patients harboring PIK3CA mutations, 28 patients were evaluable for response, the confirmed objective response rate was 14.3% (4/28). In conclusion, CYH33 exhibits a manageable safety profile and preliminary anti-tumor efficacy in solid tumors harboring PIK3CA mutations.
Decrease in phosphorylated ERK indicates the therapeutic efficacy of a clinical PI3Kα-selective inhibitor CYH33 in breast cancer
Cancer Lett 2018 Oct 1;433:273-282.PMID:30003928DOI:10.1016/j.canlet.2018.07.011.
PI3Ks are frequently hyper-activated in breast cancer and targeting PI3Kα has exhibited promising but variable response in preclinical and clinical settings. CYH33 is a novel PI3Kα-selective inhibitor in phase I clinical trial. We investigated the efficacy of CYH33 against breast cancer and explored potential predictive biomarkers. CYH33 potently restrained tumor growth in mice bearing human breast cancer cell xenografts and in R26-Pik3caH1047R;MMTV-Cre transgenic mice. CYH33 significantly inhibited proliferation of a panel of human breast cancer cells, while diversity in sensitivity has been observed. Cells harboring activating PIK3CA mutation, amplified HER2 were more responsive to CYH33 than their counterparts. Besides, cells in HER2-enriched or luminal subtype were more sensitive to CYH33 than basal-like breast cancer. Sensitivity to CYH33 has been further revealed to be associated with induction of G1 phase arrest and simultaneous inhibition of Akt and ERK. Sensitivity of patient-derived xenograft to CYH33 was also positively correlated with decrease in phosphorylated ERK. Taken together, CYH33 is a promising PI3Kα inhibitor for breast cancer treatment and decrease in ERK phosphorylation may indicate its efficacy, which provides useful clues for rational design of the ongoing clinical trials.
Identification of methyl (5-(6-((4-(methylsulfonyl)piperazin-1-yl)methyl)-4-morpholinopyrrolo[2,1-f][1,2,4]triazin-2-yl)-4-(trifluoromethyl)pyridin-2-yl)carbamate (CYH33) as an orally bioavailable, highly potent, PI3K alpha inhibitor for the treatment of advanced solid tumors
Eur J Med Chem 2021 Jan 1;209:112913.PMID:33109399DOI:10.1016/j.ejmech.2020.112913.
In various human cancers, PI3Ks pathway is ubiquitously dysregulated and thus become a promising anti-cancer target. To discover new potent and selective PI3K inhibitors as potential anticancer drugs, new pyrrolo[2,1-f][1,2,4]triazines were designed, leading to the discovery of compound 37 (CYH33), a selective PI3Kα inhibitor (IC50 = 5.9 nM, β/α, δ/α,γ/α = 101-, 13-, 38-fold). Western blot analysis confirmed that compound 37 could inhibit phosphorylation of AKT in human cancer cells to modulate the cellular PI3K/AKT/mTOR pathway. And further evaluation in vivo against SKOV-3 xenograft models demonstrated that a dose-dependent antitumor efficacy was achieved.