STAT3 Selective Inhibitors | Activators

Catalog No. Product Name Information Selective / Pan IC50 / Ki
S8561 HJC0152

HJC0152 is a signal transducer and activator of transcription 3 (STAT3) inhibitor with remarkably improved aqueous solubility.


APTSTAT3-9R is a specific STAT3-binding peptide with addition of a cell-penetrating motif. The treatment of APTSTAT3-9R in various types of cancer cells blocks STAT3 phosphorylation and reduces expression of STAT targets.

S7923 SH5-07 (SH-5-07)

SH5-07 is a robust hydroxamic acid-based STAT3 inhibitor, which induce antitumor cell effects in vitro and antitumor response in vivo against human glioma and breast cancer models.

S8605 C188-9

C188-9 (TTI 101) is a potent inhibitor of STAT3 that binds to STAT3 with high affinity (KD=4.7±0.4 nM). C188-9 is well tolerated in mice, shows good oral bioavailability, and is concentrated in tumors.

Selective STAT3, Kd: 4.7 nM
S7769 BP-1-102

BP-1-102 is a potent, orally bioavailable and selective STAT3 inhibitor, binds Stat3 with an affinity Kd of 504 nM and blocks Stat3-phospho-tyrosine (pTyr) peptide interactions and Stat3 activation at 4-6.8 μM.

Selective STAT3, Kd: 504 nM
S3030 Niclosamide (BAY2353)

Niclosamide (BAY2353, Niclocide, NSC 178296) can inhibit DNA replication and inhibit STAT3 with IC50 of 0.7 μM in a cell-free assay. Niclosamide selectively inhibited the phosphorylation of STAT3 and had no obvious inhibition against the activation of other homologues (e.g., STAT1 and STAT5).

Selective STAT3, IC50: 0.7 μM
S0818 STAT3-IN-1

STAT3-IN-1 (compound 7d) is an excellent, selective and orally active inhibitor of STAT3 with IC50 of 1.82 μM and 2.14 μM in HT29 and MDA-MB 231 cells, respectively. STAT3-IN-1 induces apoptosis of tumor cells.

Selective STAT3, IC50: 2.14 μM; STAT3, IC50: 1.82 μM
S2796 WP1066

WP1066 is a novel inhibitor of JAK2 and STAT3 with IC50 of 2.30 μM and 2.43 μM in HEL cells; shows activity to JAK2, STAT3, STAT5, and ERK1/2 not JAK1 and JAK3. WP1066 induces apoptosis. Phase 1.

Selective STAT3, IC50: 2.43 μM
S2285 Cryptotanshinone

Cryptotanshinone is a STAT3 inhibitor with IC50 of 4.6 μM in a cell-free assay, strongly inhibits phosphorylation of STAT3 Tyr705, with a small effect on STAT3 Ser727, but none against STAT1 nor STAT5. Cryptotanshinone induces ROS-dependent autophagy and mitochondria-mediated apoptosis.

Selective STAT3, IC50: 4.6 μM
S7024 Stattic

Stattic, the first nonpeptidic small molecule, potently inhibits STAT3 activation and nuclear translocation with IC50 of 5.1 μM in cell-free assays, highly selectivity over STAT1. Stattic induces apoptosis.

Selective STAT3, IC50: 5.1 μM
S1396 Resveratrol (SRT501)

Resveratrol (SRT501, trans-Resveratrol) has a wide spectrum of targets including cyclooxygenases(i.e. COX, IC50=1.1 μM), lipooxygenases(LOX, IC50=2.7 μM), kinases, sirtuins and other proteins. It has anti-cancer, anti-inflammatory, blood-sugar-lowering and other beneficial cardiovascular effects. Resveratrol induces mitophagy/autophagy and autophagy-dependent apoptosis.

Selective STAT3, IC50: 20 μM
S1155 S3I-201

S3I-201 (NSC 74859) shows potent inhibition of STAT3 DNA-binding activity with IC50 of 86 μM in cell-free assays, and low activity towards STAT1 and STAT5.

Selective STAT3, IC50: 86 μM
S7977 Napabucasin (BBI608)

Napabucasin (BBI608) is an orally available Stat3 and cancer cell stemness inhibitor.

S6919 Brevilin A

Brevilin A (6-O-Angeloylplenolina), a sesquiterpene lactone isolated from Centipeda minima, is a selective inhibitor of STAT3 and attenuates the JAKs activity by blocking the JAKs tyrosine kinase domain JH1. Brevilin A induces apoptosis and autophagy of colon adenocarcinoma cell CT26 via mitochondrial pathway and PI3K/AKT/mTOR inactivation.

S3267 Kaempferol-3-O-rutinoside

Kaempferol-3-O-rutinoside (Nicotiflorin, Nikotoflorin, Kaempferol 3-O-β-rutinoside), a flavonoid extracted from Carthamus tinctorius, alters the shape and structure of injured neurons, decreases the number of apoptotic cells, down-regulates expression of p-JAK2, p-STAT3, caspase-3, and Bax and decreases Bax immunoredactivity, and increases Bcl-2 protein expression and immunoreactivity.

S7501 HO-3867

HO-3867, an analog of curcumin, is a selective STAT3 inhibitor that inhibits its phosphorylation, transcription, and DNA binding without affecting the expression of other active STATs. HO-3867 induces apoptosis.

S1014 Bosutinib (SKI-606)

Bosutinib (SKI-606) is a novel, dual Src/Abl inhibitor with IC50 of 1.2 nM and 1 nM in cell-free assays, respectively. Bosutinib also effectively decreases the activity of PI3K/AKT/mTOR, MAPK/ERK and JAK/STAT3 signaling pathways by blocking the phosphorylation levels of p-ERK, p-S6, and p-STAT3. Bosutinib promotes autophagy.

S7951 Ochromycinone (STA-21)

Ochromycinone (STA-21) is a selective STAT3 inhibitor.

S2824 TPCA-1

TPCA-1 (GW683965) is an inhibitor of IKK-2 with IC50 of 17.9 nM in a cell-free assay, inhibits NF-κB pathway, exhibits 22-fold selectivity over IKK-1. TPCA-1 is also an inhibitor of STAT3 and enhances apoptosis.

S0445 SC-43

SC-43, a sorafenib derivative, is an agonist of Src-homology protein tyrosine phosphatase-1 (SHP-1/PTPN6) and reduces liver fibrosis. SC-43 reduces p-STAT3 and induces apoptosis with anti-tumor activity.

S2265 Artesunate (WR-256283)

Artesunate (WR-256283) is a part of the artemisinin group of agents with an IC50 of < 5 μM for small cell lung carcinoma cell line H69. It is a potential inhibitor of STAT-3 and exhibits selective cytotoxicity of cancer cells over normal cells in vitro; A potent inhibitor of EXP1.

S0918 Ginkgolic acid C17:1

Ginkgolic acid C17:1 (GAC 17:1) inhibits constitutive activation of STAT3 through the abrogation of upstream JAK2 and Src. Ginkgolic acid C17:1 can induce the substantial expression of PTEN and SHP-1. Ginkgolic acid C17:1 induces apoptosis of tumor cells.

S9664 Colivelin

Colivelin (CLN) is a brain-penetrant neuroprotective peptide with potent long-term capacity against deposition, neuronal apoptosis, and synaptic plasticity deficits in neurodegenerative disease. Colivelin is an activator of STAT3.

S3810 Scutellarin

Scutellarin (Breviscapine, Breviscapin, Scutellarein-7-glucuronide), the major active principal flavonoids extracted from the Chinese herbal medicines Scutellaria baicalensis and Erigeron breviscapus (Vant.) Hand-Mazz, has many pharmacological effects, such as antioxidant, antitumor, antiviral, and antiinflammatory activities. Scutellarin can down-regulates the STAT3/Girdin/Akt signaling in HCC cells, and inhibits RANKL-mediated MAPK and NF-κB signaling pathway in osteoclast

S0949 Cucurbitacin IIb

Cucurbitacin IIb (CuIIb, Dihydrocucurbitacin F, 25-deacetyl hemslecin A) inhibits phosphorylation of STAT3, JNK and Erk1/2, enhances the phosphorylation of IκB and NF-κB, blocks nuclear translocation of NF-κB and decreases mRNA levels of IκBα and TNF-α. Cucurbitacin IIb exhibits anti-inflammatory activity and induces apoptosis. Cucurbitacin IIb is isolated from Hemsleya amabilis.

S7337 SH-4-54

SH-4-54 is a potent STAT inhibitor with KD of 300 nM and 464 nM for STAT3 and STAT5, respectively.

Pan STAT3, Kd: 300 nM
S4182 Nifuroxazide

Nifuroxazide is a cell-permeable and orally available nitrofuran-based antidiarrheal agent that effectively suppresses the activation of cellular STAT1/3/5 transcription activity with IC50 of 3 μM against IL-6-induced STAT3 activation in U3A cells.

S4358 Pimozide

Pimozide (Orap, R6238) is an antagonist of Dopamine Receptors with Ki of 0.83 nM, 3.0 nM and 6600 nM for dopamine D3, D2 and D1 receptors, respectively. Pimozide also exhibits binding affinity at α2-adrenoceptor and 5-HT1A with Ki of 360 nM and 310 nM, respectively. Pimozide is an antipsychotic drug with anti-tumor activity and suppresses STAT3 and STAT5 activity.