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June 1, 2012
Return of the Rhodanome
I do hate to bring up rhodanines again, but I'm not the one who keeps making the things. This paper from ACS Medicinal Chemistry Letters turns out dozens of the things as potential inhibitors of the cellular protein dynamin, in what a colleague of mine referred to as a "nice exploration of the rhodanome".
He did not say it with a straight face. But this paper does: "The rhodanine core is a privileged scaffold in medicinal chemistry and one that has found promise among many therapeutic applications." Well, that's one way to look at it. Another viewpoint is that rhodanines are "polluting the scientific literature" and that they should "be considered very critically" no matter what activity they show in your assay.
The usual answer to this is that these aren't drugs, they're tool compounds. But I don't think that these structures even make safe tools; they have the potential to do too many other things in cell assays. But if people are going to go ahead and use them, I wish that they'd at least make a nod in that direction, instead of mentioning, in passing, how great the whole class is. And yes, I know that they cite two papers to that effect, but one of those two mainly just references the other one when it comes to rhodanines. My viewpoint is more like this paper's:
Academic drug discovery is being accompanied by a plethora of publications that report screening hits as good starting points for drug discovery or as useful tool compounds, whereas in many cases this is not so. These compounds may be protein-reactive but can also interfere in bioassays via a number of other means, and it can be very hard to prove early on that they represent false starts. . .
And I endorse this view as well:
. . .Barriers to adoption of best practices for some academic drug-discovery researchers include knowledge gaps and infrastructure deficiencies, but they also arise from fundamental differences in how academic research is structured and how success is measured. Academic drug discovery should not seek to become identical to commercial pharmaceutical research, but we can do a better job of assessing and communicating the true potential of the drug leads we publish, thereby reducing the wastage of resources on nonviable compounds.
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