Description
LY2606368 is a checkpoint kinase 1 (Chk1) inhibitor with a K
i value of 0.9 nM against the purified target and IC
50 values of <13 nM in a viability study of multiple colorectal cancer cell lines. Inhibition of Chk1 causes double-strand DNA breakage in cells leading to an excessive cell damage burden and subsequent cell death.
In vitro, LY2606368 inhibits the doxorubicin-activated G
2/M checkpoint in p53-deficient HeLa cells with an EC
50 value of 9 nM. LY2606368, at 25 nM, also significantly induces apoptosis and inhibits colony formation in AGS and MKN1 gastric cancer cells.
Uses
LY 2606368 is a novel CHK1 inhibitor under investigation as a chemopotentiating agent. It causes double-stranded DNA breakage while simultaneously removing the protection of the DNA damage checkpoints. LY 2606368 is representative of a novel class of drugs for the treatment of cancer and tumor growth inhibition.
References
[1] wu w, bi c, bence a k, et al. antitumor activity of chk1 inhibitor ly2606368 as a single agent in sw1990 human pancreas orthotopic tumor model. cancer research, 2012, 72(8 supplement): 1776.
[2] lainchbury m, matthews t p, mchardy t, et al. discovery of 3-alkoxyamino-5-(pyridin-2-ylamino) pyrazine-2-carbonitriles as selective, orally bioavailable chk1 inhibitors. journal of medicinal chemistry, 2012, 55(22): 10229-10240.
[3] mcneely s c, burke t f, durlandbusbice s, et al. abstract a108: ly2606368, a second generation chk1 inhibitor, inhibits growth of ovarian carcinoma xenografts either as monotherapy or in combination with standard-of-care agents. molecular cancer therapeutics, 2011, 10(supplement 1): a108.
