1. PROTAC Protein Tyrosine Kinase/RTK
  2. PROTACs Bcr-Abl
  3. SIAIS056

SIAIS056 is a BCR-ABL PROTAC degrader with a DC50 value of 0.18 nM. SIAIS056 time-dependently inhibits the BCR-ABL signaling pathway, accompanied by decreased phosphorylation of BCR-ABL and the downstream molecules STAT5 and CRKL in K562 cells. SIAIS056 induces the degradation of several clinically relevant resistance-conferring mutations of BCR-ABL. SIAIS056 exhibits anti-proliferative activity and induces substantial tumor regression in K562 xenograft models. SIAIS056 can be used for leukemia research.
(Pink: Bcr-Abl ligand (HY-175916); Blue: Cereblon ligand (HY-W586107); Black: linker (HY-41939)).

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SIAIS056

SIAIS056 Chemical Structure

CAS No. : 2378581-37-2

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Description

SIAIS056 is a BCR-ABL PROTAC degrader with a DC50 value of 0.18 nM. SIAIS056 time-dependently inhibits the BCR-ABL signaling pathway, accompanied by decreased phosphorylation of BCR-ABL and the downstream molecules STAT5 and CRKL in K562 cells. SIAIS056 induces the degradation of several clinically relevant resistance-conferring mutations of BCR-ABL. SIAIS056 exhibits anti-proliferative activity and induces substantial tumor regression in K562 xenograft models. SIAIS056 can be used for leukemia research[1][2]. (Pink: Bcr-Abl ligand (HY-175916); Blue: Cereblon ligand (HY-W586107); Black: linker (HY-41939)).

IC50 & Target[1]

Bcr-Abl

0.18 μM (DC50)

In Vitro

SIAIS056 (2 days) reduces anti-proliferative activity against K562 and 32D-BCR-ABL cells[1].
SIAIS056 (0-100 μM, 0-24 h) time-dependently inhibits the BCR-ABL signaling pathway, accompanied by decreased phosphorylation of BCR-ABL and its downstream molecules STAT5 and CRKL in K562 cells[1].
SIAIS056 (0-300 nM, 16 h) exerts the ability to overcome resistance to clinical tyrosine kinase inhibitors caused by (or associated with) the majority of clinically common BCR-ABL mutations in murine myeloid cell line 32D (including BCR-ABL-WT, BCR-ABL-G250E, BCR-ABL-E255V, BCR-ABL-V299L, BCR-ABL-F317L, BCR-ABL-F317V, BCR-ABL-T315A)[1].

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

Western Blot Analysis[1]

Cell Line: K562 cells
Concentration: 0, 1, 3, 10, 30 and 100 nM
Incubation Time: 0, 2, 4, 8, 12, 18 and 24 h
Result: Dramatically decreased the protein level of BCR-ABL and c-ABL at dose dependent manner (16 h) and time dependent manner (30 nM).
Induced the degradation of Src, but not PDGFRβ.
Dramatically decreased BCR-ABL after4h treatment at the 30 nM.
Time-Dependently inhibited the BCR-ABL signaling accompanied with decreased phosphorylation of BCR ABL and the downstream molecules STAT5 and CRKL.
Induced degradation of BCR-ABL and c-ABL at 30 nM for 8 h, which was significantly blocked by Pomalidomide (HY-10984) (4 μM, 2 h), Dasatinib (HY-10181) (100 nM, 2 h), MG132 (HY-13259) (2 μM, 2 h), Pevonedistat (HY-70062) (3 μM, 2 h).

Western Blot Analysis[1]

Cell Line: K562 cells
Concentration: 0, 10, 100 and 300 nM
Incubation Time: 16 h
Result: Induced degradation of BCR-ABL mutations in BCR-ABL-WT, BCR-ABL-G250E, BCR-ABL-E255V, BCR-ABL-V299L, BCR-ABL-F317L, BCR-ABL-F317V and BCR-ABL-T315A, but in BCR-ABL-T3151 cells.
Parmacokinetics
Species Dose Route T1/2 Tmax Cmax AUC0-t MRT0-t Vss Vz CL
Rat[1] 2 mg/mL i.v. 4.23 h 0.08 h 1497.45 ng/mL 926.29 ng·h/mL 2 h 5225.18 mL/kg 13048.83 mL/kg 2140.26 mL/h/kg
In Vivo

SIAIS056 (1-10 mg/kg, i.p., once a day for 10 days) induces effective degradation of BCR-ABL protein and substantial anti-leukemic activity in a murine xenograft mouse model of K562 cells[1].

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

Animal Model: K562 cells (2 x 106) induced-NOD/SCID mouse[1]
Dosage: 1, 3 and 10 mg/kg
Administration: i.p., once a day for 10 days
Result: Observed a reduction in tumor burden at 1 mg/kg.
Induced complete tumor regression at 10 mg/kg, which was maintained even after drug withdrawal.
Showed tumor growth inhibition (TGI) values of 78.9%, 93.8%, and 98.8% for the 1, 3, and 10 mg/kg.
exhibited similar anti-leukemic activity at 3 mg/kg to that of Dasatinib (HY-10181) at 5 mg/kg (o.p.) (TGI: 93.8% versus 95.1%).
Showed well tolerate at the dose of 100 mg/kg.
Preserved the weight.
Showsed an anti-CML efficacy after 10 days.
Observed the BCR-ABL protein degradation at 4 day as well as suppression of BCR-ABL phosphorylation.
Molecular Weight

760.28

Formula

C35H34ClN9O5S2

CAS No.
SMILES

O=C(C1=CN=C(NC2=CC(N3CCN(CC3)CCSC4=CC=CC(C(N5C6C(NC(CC6)=O)=O)=O)=C4C5=O)=NC(C)=N2)S1)NC7=C(C)C=CC=C7Cl

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Room temperature in continental US; may vary elsewhere.

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Please store the product under the recommended conditions in the Certificate of Analysis.

Purity & Documentation
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  • Do most proteins show cross-species activity?

    Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.

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SIAIS056
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HY-180969
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