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Datasheet of RITA Description: RITA(NSC 652287) induced both DNA-protein and DNA-DNA cross-links with no detectable DNA single-strand breaks. RITA, a drug that, like nutlin-3, can disrupt the p53/Mdm2 interaction. in vitro: [2,2':5',2"-terthiopene] 5,5"-diyldimethanol (1f) displayed promising antiproliferative activity compared to RITA (IC50=28 nM in MCF-7 cells and 100 nM in colon cancer HCT116 cells, vs. 54 and 0.10 nM, respectively, for RITA) [4]. NSC 652287 induced both DNA-protein and DNA-DNA cross-links with no detectable DNA single-strand breaks. These DNA-protein cross-links (DPC) persisted for at least 12 h after drug removal and their frequency was correlated with cytotoxicity in the renal cell lines studied. The most sensitive renal carcinoma cell line, A498, exhibited cell cycle arrest in G(0)-G(1) and G(2)-M at 10 nM NSC 652287, with increased p53 and p21(WAF1) protein. At higher concentrations, NSC 652287 still induced p53 elevation but with p21(WAF1) reduction and massive apoptosis. RITA induced prominent accumulation and reactivation of p53 in a wild-type TP53-bearing HNC cell line. RITA showed maximal growth suppression in tumor cells showing MDM2-dependent p53 degradation. RITA promoted apoptosis in association with upregulation of p21, BAX, and cleaved caspase-3; notably, the apoptotic response was blocked by pifithrin-α, demonstrating its p53 dependence. With increasing concentrations, RITA strongly induced apoptosis rather than G2-phase arrest. By Western blot analysis we further confirmed that RITA induced activation of p53 in conjunction with up-regulation of phosphorylated ASK-1, MKK-4 and c-Jun.
Chemical Information Catalog
DC1064
Purity of current batch:
>98%
Molecular Weight (MW)
292.37
Molecular Formula
C14H12O3S2
CAS No.
213261-59-7
Solubility (25°C)
DMSO
Storage
Store at -20°C (desiccating conditions).
Handling: Providing storage is as stated on the product vial and the vial is kept tightly sealed, the product can be stored for up to 24 months. Wherever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20°C. Generally, these will be useable for up to one month. Before use, and prior to opening the vial we recommend that you allow your product to equilibrate to room temperature for at least 1 hour.