(-)-DHMEQ (Dehydroxymethylepoxyquinomicin) is a potent, selective and irreversible NF-κB inhibitor that covalently binds to a cysteine residue. (-)-DHMEQ inhibits nuclear translocation of NF-κB and shows anti-inflammatory and anticancer activity.
IC50&Target
RelA
RelB
体外研究
(-)-DHMEQ (Dehydroxymethylepoxyquinomicin; 2-10 μg/mL; 12-48 hours) treatment significantly reduces the viability of all cell lines in a dose- and time-dependent manner, whereas the effect is not significant in a control cell line K562 without constitutive NF-κB activity.
(-)-DHMEQ (10 μg/mL; 0-48 hours; TL-Om1, MT-1 and K562 cells) treatment significantly increases the Annexin V-positive cells in MT-1 and TL-Om1 cell lines.
(-)-DHMEQ (10 μg/mL; 4-16 hours; MT-1 cells) treatment down-regulates Bcl-xL, Bcl-2, c-myc, cyclin D1, Rb, and p53, and up-regulates proapoptotic genes such as caspase-3, -8, and-9.
(-)-DHMEQ treatment increases cells in G0 /G1 phase in a time-dependent manner, demonstrating antiproliferative effects of (-)-DHMEQ.
(-)-DHMEQ binds to p65, cRel, RelB, and p50, but not to p52 at specific cysteine residues. (-)-DHMEQ inhibits not only DNA-binding of RelB, but also its interaction to importin. (-)-DHMEQ also induces instability of RelB.
Cell Proliferation Assay
Cell Line:
TL-Om1, MT-1, KK-1, ST-1 and K562 cells
Concentration:
2 μg/mL, 5 μg/mL, 10 μg/mL
Incubation Time:
12 hours, 24 hours, 48 hours
Result:
Significantly reduced the viability of all cell lines in a dose- and time-dependent manner.
Apoptosis Analysis
Cell Line:
TL-Om1, MT-1 and K562 cells
Concentration:
10 μg/mL
Incubation Time:
0 hours, 24 hours, 48 hours
Result:
Annexin V-positive cells were significantly increased after 24 to 48 hours.
Western Blot Analysis
Cell Line:
MT-1 cells
Concentration:
10 μg/mL
Incubation Time:
4 hours, 8 hours, 16 hours
Result:
Annexin V-positive cells were significantly increased after 24 to 48 hours.
体内研究
(-)-DHMEQ (Dehydroxymethylepoxyquinomicin; 4 mg/kg or 12 mg/kg; intraperitoneal injection; on day 0 and 3 times a week; for one month; SCID mice) treatment shows a significant increase in the survival rate in mice.
Animal Model:
Male C.B17-scid/scid (5 weeks old) mice injected with MT-2 cells
Dosage:
4 mg/kg or 12 mg/kg
Administration:
Intraperitoneal injection; on day 0 and 3 times a week; for one month
Result:
Showed a significant increase in the survival rate in mice.
分子式
C13H11NO5
分子量
261.23
CAS号
287194-40-5
运输条件
Room temperature in continental US; may vary elsewhere.