- Title
- Quinolone-1-(2H)-ones as hedgehog signalling pathway inhibitors
- Creator
- Trinh, Trieu N.; McLaughlin, Eileen A.; Abdel-Hamid, Mohammed K.; Gordon, Christopher P.; Bernstein, Ilana R.; Pye, Victoria; Cossar, Peter; Sakoff, Jennette A.; McCluskey, Adam
- Relation
- NHMRC|1021156 http://purl.org/au-research/grants/nhmrc/1021156
- Relation
- Organic & Biomolecular Chemistry Vol. 14, Issue 26, p. 6304-6315
- Publisher Link
- http://dx.doi.org/10.1039/c6ob00606j
- Publisher
- Royal Society of Chemistry
- Resource Type
- journal article
- Date
- 2016
- Description
- A series of quinolone-2-(1H)-ones derived from the Ugi-Knoevenagel three- and four-component reaction were prepared exhibiting low micromolar cytotoxicity against a panel of eight human cancer cell lines known to possess the Hedgehog Signalling Pathway (HSP) components, as well as the seminoma TCAM-2 cell line. A focused SAR study was conducted and revealed core characteristics of the quinolone-2-(1H)-ones required for cytotoxicity. These requirements included a C3-tethered indole moiety, an indole C5-methyl moiety, an aliphatic tail or an ester, as well as an additional aromatic moiety. Further investigation in the SAG-activated Shh-LIGHT2 cell line with the most active analogues: 2-(3-cyano-2-oxo-4-phenylquinolin-1(2H)-yl)-2-(1-methyl-1H-indol-3-yl)-N-(pentan-2-yl)acetamide (5), 2-(3-cyano-2-oxo-4-phenylquinolin-1(2H)-yl)-2-(5-methyl-1H-indol-3-yl)-N-(pentan-2-yl)acetamide (23) and ethyl (2-(3-cyano-2-oxo-4-phenylquinolin-1(2H)-yl)-2-(5-methyl-1H-indol-3-yl)acetyl)glycinate (24) demonstrated a down regulation of the HSP via a reduction in Gli expression, and in the mRNA levels of Ptch₁ and Gli₂. Analogues 5, 23 and 24 returned in cell inhibition values of 11.6, 2.9 and 3.1 μM, respectively, making this new HSP-inhibitor pharmacophore amongst the most potent non-Smo targeted inhibitors thus far reported.
- Subject
- hedgehog signalling pathway; cytotoxicity; cancer cells; pharmacophore
- Identifier
- http://hdl.handle.net/1959.13/1338620
- Identifier
- uon:28064
- Identifier
- ISSN:1477-0520
- Language
- eng
- Full Text
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