PI3Kδ Inhibitor

DHW-221 is a potent orally active dual PI3K/mTOR inhibitor, exhibiting low nanomolar potency against all four Class I PI3K isoforms and mTOR (PI3Kα, IC₅₀ = 0.50 nM; PI3Kβ, IC₅₀ = 1.9 nM; PI3Kγ, IC₅₀ = 1.8 nM; PI3Kδ, IC₅₀ = 0.74 nM; mTOR, IC₅₀ = 3.9 nM). DHW-221 exerts antitumor effects by blocking the PI3K/Akt/mTOR pathway and inducing mitochondrial apoptosis and paraptosis (via Endoplasmic Reticulum (ER) stress and MAPK signaling) and arrests cell cycle, thereby inhibiting cell migration, invasion and angiogenesis. DHW-221 inhibits tumor growth in both the A549/Taxol (HY-B0015) and the HCC827 xenograft mouse models. DHW-221 can be used for non-small cell lung cancer (NSCLC), colon and breast cancer research.

PI3Kδ-IN-28 is an orally active and selective PI3Kδ inhibitor with an IC₅₀ of 6.1 nM. PI3Kδ-IN-28 inhibits pro-inflammatory M1 macrophage polarization, promotes anti-inflammatory M2 phenotype, and alleviates pulmonary edema and inflammatory infiltration. PI3Kδ-IN-28 is applicable to research related to acute lung injury.

PI3Kδ-IN-11 is a highly potent and selective PI3Kδ inhibitor with IC₅₀ value of 27.5 nM. PI3Kδ-IN-11 dose-dependently blocks the activity of PI3K/Akt pathway. PI3Kδ-IN-11 can be used for researching B or T cell-related malignancies.

PI3Kδ/BET-IN-1 (compound 10b) shows excellent and balanced activities against PI3Kδ (IC₅₀ = 112 nM) and BRD4-BD1 (IC₅₀ = 19 nM) and exhibits strong antiproliferative activities in DLBCL cells.

LNP23 is a selective PI3Kα inhibitor with an IC₅₀ of 5.15 nM. LNP23 inhibits PI3K/AKT signaling and induces apoptosis and G1 phase arrest in MCF-7 cells. LNP23 also inhibits cancer cell proliferation, colony formation, and migration. LNP23 can be used for breast cancer and lung adenocarcinoma research.

NVP-CLR457 (compound 40) is an orally active, potent and balanced pan-class I PI3K inhibitor. NVP-CLR457 shows a clear dose-dependent PK/PD/efficacy relationship. NVP-CLR457 has antitumor activity.

PI3K-IN-34 (Compound 6g) is a highly selective PI3K inhibitor with IC₅₀ values of 11.73, 6.09 and 11.18 μM for PI3K-α、PI3K-β and PI3K-δ , respectively. PI3K-IN-34 arrests cell cycle at G2/M phase and induces apoptosis. PI3K-IN-34 can be used in leukemia research.

PI3K/HDAC-IN-2 is a potent dual PI3K/HDAC inhibitor with IC₅₀s of 226 nM, 279 nM, 467 nM, 29 nM for PI3Kα, PI3Kβ, PI3Kγ, PI3Kδ, respectively, and IC₅₀s of 1.3 nM, 3.4 nM, 972 nM, 17 nM, 12 nM for HDAC1, HDAC2, HDC4, HDAC6, HDAC8, respectively. PI3K/HDAC-IN-2 exhibits PI3Kδ and class I and IIb HDAC selectivity. PI3K/HDAC-IN-2 has remarkable anticancer effects.

Pabgraminone C (IM502) is a Fungal metabolite and PI3Kγ inhibitor with an IC₅₀ of 61.7 nM against PI3Kγ. Pabgraminone C shifts the STAT signaling pathway in cells from an immunosuppressive STAT3/STAT6-dominant profile to an immunostimulatory STAT1/STAT2-dominant profile, driving cells toward a pro-inflammatory phenotype. Pabgraminone C reprograms cells from an immunosuppressive state to an immunostimulatory state, reversing their suppressive effect on anti-tumor immunity. Pabgraminone C inhibits established tumor growth and metastasis across multiple cancer types. Pabgraminone C overcomes resistance to PD-1 checkpoint blockade strategies. Pabgraminone C can be used in research related to liver cancer, melanoma, and colorectal cancer.

PI3Kα-IN-29 is a potent, orally active and selective PI3Kα with an IC₅₀ of 2.5 nM. PI3Kα-IN-29 exhibits >400-fold selectivity over PI3Kβ/δ/γ/mTOR. PI3Kα-IN-29 selectively degrades the H1047R mutant p110α protein and inhibits PI3Kα kinase activity. PI3Kα-IN-29 suppresses PI3K/AKT/mTOR signaling, induces G1 arrest, and inhibits migration. PI3Kα-IN-29 inhibits tumor growth in a T47 mouse model. PI3Kα-IN-29 can be used for the research of breast cancer.

PI3K/HDAC-IN-5 is a dual PI3K/HDAC inhibitor. PI3K/HDAC-IN-5 inhibits PI3Kα, PI3Kβ, PI3Kγ, and PI3Kδ (IC₅₀ values of 25.41, 134.52, 166.75, and 41.58 nM, respectively) and inhibits downstream PI3K/AKT signaling. PI3K/HDAC-IN-5 inhibits HDAC6, HDAC8, and HDAC11 (IC₅₀ values of 29.35, 157.27, and 382.26 nM, respectively), increases α-tubulin and SMC3 acetylation, while not affecting histone H3/H4 acetylation. PI3K/HDAC-IN-5 induces S phase cell cycle arrest and apoptosis, and inhibits the proliferation of cervical cancer cell lines. PI3K/HDAC-IN-5 can be used for research on cervical cancer.

PIK-39 is a selective PI3Kδ inhibitor with an IC₅₀ of 0.30 μM. PIK-39 has a propeller-like structure that induces conformational changes in the ATP-binding region of its target. PIK-39 is applicable to the research of autoimmune diseases.

(R)-IHMT-PI3Kδ-372 (R-18) is a potent and selective PI3Kδ inhibitor with an IC₅₀ of 19 nM. (R)-IHMT-PI3Kδ-372 (R-18) can be used in chronic obstructive pulmonary disease (COPD) research.

PI3K/mTOR-IN-20 is a selective dual PI3K/mTOR inhibitor. PI3K/mTOR-IN-20 demonstrates nanomolar antiproliferative effects with IC₅₀s of 0.380 and 0.090 μM for MRC-5 and Mlg2908 cells. PI3K/mTOR-IN-20 reduces Ashcroft scores, hydroxyproline content, collagen deposition, and downregulates fibrosis-related proteins, while restoring lung architecture in a Bleomycin-induced pulmonary fibrosis model. PI3K/mTOR-IN-20 shows a favorable safety profile with steady weight recovery and no distinct liver or kidney toxicity. PI3K/mTOR-IN-20 can be used for fetal lung fibroblasts research.

IHMT-PI3K-315 (20e) is a potent and selective PI3Kγ/δ inhibitor with IC₅₀ values for PI3Kγ and PI3Kδ of 4.0 and 9.1 nM, respectively. IHMT-PI3K-315 has antitumor activity.

PI3Kδ-IN-22 (Compound 26) is a selective inhibitor for PI3Kδ with pK_i of 9.3. PI3Kδ-IN-22 inhibits PI3Kδ-AKT signaling pathway in THP-1 cells, with pIC₅₀ of 9.4. PI3Kδ-IN-22 exhibits good pharmacokinetic characters in rats.

Rac)-AZD8186 is the racemate of AZD8186 (HY-12330), a PI3K inhibitor that inhibits PI3Kβ (IC₅₀=4 nM), PI3Kδ (IC₅₀=12 nM), PI3Kα (IC₅₀=35 nM) and PI3Kγ (IC₅₀=675 nM).

Umbralisib R-enantiomer (TGR-1202 R-enantiomer) is a PI3Kδ inhibitor, which is the less active enantiomer of TGR-1202.

MEK/PI3K-IN-2 (compound 6s) is a potent MEK/PI3K inhibitor, with IC₅₀ values of 352 nM (MEK1), 107 nM (PI3Kα), and 137 nM (PI3Kδ), respectively. MEK/PI3K-IN-2 suppresses pAKT and pERK1/2 levels. MEK/PI3K-IN-2 shows anti-proliferative activity against tumor cell lines.

PI3Kδ/γ-IN-3 (Compound 58) is a potent and orally active PI3Kδ and PI3Kγ dual inhibitor with IC₅₀s of 1 nM and 16 nM, respectively. PI3Kδ/γ-IN-3 induces tumor cell apoptosis and can be used for B-cell malignancies research.