AI Article Synopsis
- * A small-molecule inhibitor called KGP94, and its analogues, have been developed to inhibit cathepsin L effectively, with KGP94 showing an IC value of 189nM.
- * To improve KGP94's solubility for biological studies, a water-soluble phosphate salt (KGP420) was created, which can easily convert back to KGP94 in the body, as shown by enzymatic studies.
Article Abstract
The magnitude of expression of cathepsin L, often upregulated in the tumor microenvironment, correlates with the invasive and metastatic nature of certain tumors. Inhibition of cathepsin L represents an emerging strategy for the treatment of metastatic cancer. A potent, small-molecule inhibitor (referred to as KGP94) of cathepsin L, and new KGP94 analogues were synthesized. (3,5-Dibromophenyl)-(3-hydroxyphenyl) ketone thiosemicarbazone (22), with an IC value of 202nM, exhibited similar inhibitory activity against cathepsin L compared to KGP94 (IC=189nM). Due to limited aqueous solubility of KGP94, a water-soluble phosphate salt (KGP420) was prepared in order to facilitate future in vivo studies. Enzymatic hydrolysis with alkaline phosphatase (ALP) demonstrated that the phosphate prodrug, KGP420, was readily converted to the parent compound, KGP94.
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| http://dx.doi.org/10.1016/j.bmcl.2016.12.039 | DOI Listing |
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