1191245-18-7Relevant articles and documents
Methylisoindigo and its bromo-derivatives are selective tyrosine kinase inhibitors, repressing cellular stat3 activity, and target CD133+ cancer stem cells in PDAC
Tegethoff, Jana,Bischoff, Roland,Saleh, Sawsan,Blagojevic, Biljana,Merz, Karl-Heinz,Cheng, Xinlai
, (2017/09/25)
Indirubin is an active component of the herbal ingredient 'Danggui Longhui wan', which was used for the treatment of inflammation and chronic myeloid leukemia in China. The recent study showed its derivative methylisoindigo (also known as meisoindigo) preferentially targeting cancer stem cells (CSCs) in interference with AMPK and LKB1, the cellular metabolic sensors. In this study, we screened the effect of meisoindigo on a panel of 300 protein kinases and found that it selectively inhibited Stat3-associated tyrosine kinases and further confirmed its activity in cell based assays. To gain a deeper insight into the structure-activity relationship we produced 7 bromo-derivatives exhausting the accessible positions on the bisindole backbone except for in the 4-position due to the space limitation. We compared their anti-proliferative effects on tumor cells. We found that 6-bromomeisoindigo showed improved toxicity in company with increased Stat3 inhibition. Moreover, we detected that 6-bromomeisoindigo induced apoptosis of 95% of CD133+ pancreatic cancer cells. Considering that CD133 is a common marker highly expressed in a range of CSCs, our results imply the potential application of 6-bromomeisoindigo for the treatment of CSCs in different types of cancers.
Synthesis of 7-halo indoles (by machine translation)
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Paragraph 0025, (2017/01/12)
The present invention relates to synthesis of 7? Halo indole method, comprising the steps of:O-halogenated aniline, chloral hydrate and hydroxylamine hydrochloride by the Sandmeyer reaction to synthesize 7? halogenating isatin ; 7? halogenating isatin dissolved with an organic solvent, in the reducing agent by reduction reaction under the conditions of 7? Halo indole, the reducing agent is an alkali metal borohydride system, four system adopts, lithium hydride system or triethyl silane system. The beneficial effect of the invention is:in order to O-halogenated aniline and the chloral hydrate is, hydroxylamine hydrochloride as raw materials, by the Sandmeyer shall synthesis method for preparing compositions b isonitroso 7? halogenating isatin, and then by further reduction and system reduction to prepare 7? Halo indole; by the 7? Preparation halogenating isatin 7? Halo indole method, the raw material is easy to obtain, low price, higher process yield, the product purity is good, simple operation, and the like, is suitable for batch preparation 7? Halo indole. (by machine translation)
Novel inverse binding mode of indirubin derivatives yields improved selectivity for DYRK kinases
Myrianthopoulos, Vassilios,Kritsanida, Marina,Gaboriaud-Kolar, Nicolas,Magiatis, Prokopios,Ferandin, Yoan,Durieu, Emilie,Lozach, Olivier,Cappel, Daniel,Soundararajan, Meera,Filippakopoulos, Panagis,Sherman, Woody,Knapp, Stefan,Meijer, Laurent,Mikros, Emmanuel,Skaltsounis, Alexios-Leandros
supporting information, p. 22 - 26 (2013/03/13)
DYRK kinases are involved in alternative pre-mRNA splicing as well as in neuropathological states such as Alzheimer's disease and Down syndrome. In this study, we present the design, synthesis, and biological evaluation of indirubins as DYRK inhibitors wi