SB218078
Synonym(s):9,10,11,12,-Tetrahydro-9,12-epoxy-1 H-diindolo(1,2,3-fg:3ʹ,2ʹ,1ʹ-kl)pyrrolo(3,4-i)(1,6)benzodiazocine-1,3(2 H)-dione, Chk1 Inhibitor I;9,10,11,12,-Tetrahydro-9,12-epoxy-1H-diindolo(1,2,3-fg:3ʹ,2ʹ,1ʹ-kl)pyrrolo(3,4-i)(1,6)benzodiazocine-1,3(2H)-dione, Chk1 Inhibitor I;SB 218078 - CAS 135897-06-2 - Calbiochem
- CAS NO.:135897-06-2
- Empirical Formula: C24H15N3O3
- Molecular Weight: 393.39
- MDL number: MFCD27991263
- SAFETY DATA SHEET (SDS)
- Update Date: 2024-10-23 20:41:25
What is SB218078?
Description
SB 218078 is an inhibitor of checkpoint kinase 1 (Chk1) that blocks phosphorylation of cdc25 with an IC50 value of 15 nM. It less potently inhibits cdc2 and PKC (IC50s = 250 and 1,000 nM, respectively) and causes 85% inhibition of PKD1 at 1 μM. SB 218078 releases G2 cell cycle arrest induced by γ-irradiation or the topoisomerase I inhibitor topotecan . In this way, SB 218078 enhances the cytotoxicity of DNA-damaging compounds.
The Uses of SB218078
SB 218078 is a selective inhibitor of Chk1.
What are the applications of Application
SB 218078 is a potent inhibitor of Type I 5-phosphatase and Chk1
Definition
ChEBI: LSM-1274 is an indolocarbazole.
Biological Activity
Inhibitor of checkpoint kinase 1 (Chk1) that displays selectivity over other protein kinases (IC 50 values are 15, 250 and 1000 nM for Chk1, cdc2 and PKC respectively). Abrogates G 2 cell cycle arrest caused by γ -irradiation and topoisomerase I inhibition. Potentiates cytotoxicity of DNA-damaging drugs, enhancing the efficacy of some chemotherapeutics.
in vitro
SB-218078 (2.5-5 μM; 18 hours; HeLa cells) treatment abrogates G2 cell cycle arrest caused by either γ-irradiation or a topoisomerase I Topotecan inhibition.SB-218078 (500-625 μM; 96 hours; HeLa and HT-29 cells) treatment significantly increases the cytotoxicity of DNA damage .
in vivo
SB-218078 (5 mg/kg; intraperitoneal injection; for 16 hours; C57/Bl6 mice) treatment could promote a strong increase of γ-H2AX and apoptosis throughout the lymphoma, while having no effect on a healthy spleen in Myc-induced lymphomas mouse model.
storage
Store at RT
References
[1] jackson j r, gilmartin a g, imburgia c s, et al. an indolocarbazole inhibitor of human checkpoint kinase (chk1) abrogates cell cycle arrest caused by dna damage[j]. cancer research, 2000, 60(3): 566-572.
[2] gasser s, orsulic s, brown e j, et al. the dna damage pathway regulates innate immune system ligands of the nkg2d receptor[j]. nature, 2005, 436(7054): 1186-1190.
[3] alderton g k, galbiati l, griffith e, et al. regulation of mitotic entry by microcephalin and its overlap with atr signalling[j]. nature cell biology, 2006, 8(7): 725-733.
[4] murga m, campaner s, lopez-contreras a j, et al. exploiting oncogene-induced replicative stress for the selective killing of myc-driven tumors[j]. nature structural & molecular biology, 2011, 18(12): 1331-1335.
Properties of SB218078
Melting point: | >340 °C |
Density | 1.80±0.1 g/cm3(Predicted) |
storage temp. | Store at RT |
solubility | ≤5mg/ml in DMSO;5mg/ml in dimethyl formamide |
form | crystalline solid |
pka | 9.75±0.20(Predicted) |
color | Light yellow to yellow |
Safety information for SB218078
Signal word | Warning |
Pictogram(s) |
Exclamation Mark Irritant GHS07 |
GHS Hazard Statements |
H302:Acute toxicity,oral H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation |
Precautionary Statement Codes |
P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. |
Computed Descriptors for SB218078
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