CEO end of year message 2019
2019 has been another successful year for Cresset with significant growth and developments in both software and services. I want ...
Starting with a known PDE4B inhibitor, Cresset ran a virtual screening experiment in Forge (formerly known as FieldTemplater) and a fragment replacement experiment in Spark (formerly known as FieldStere) to find new starting points for research. The results included known active compounds as well as several novel chemotypes.
Chronic obstructive pulmonary disease (COPD) is a common, progressive disorder of increasing prevalence in industrialized countries. COPD is an all-inclusive term that refers to a set of symptoms including chronic cough, expectoration, exertional dyspnea and a significant, progressive reduction in expiratory airflow that may or may not be partly reversible. The airflow limitation is usually both progressive and associated with an abnormal inflammatory response of the lungs to noxious particles or gases. Several drugs have been marketed so far, and several molecular targets have been considered so far for therapeutic intervention.
This project explored the SAR of known PDE4B inhibitors extracted from Thomson Reuters’ Integrity database and used this to derive models that enabled scaffold hopping.
We first assumed that all molecules act at the same site on the same target. Using the 2D structures of the four chosen compounds shown in figure 1 as input, Cresset’s Forge calculated possible conformations for each compound, then used these to find a common field pattern across 200 representative conformations of each compound.
Secondly, Spark was used to find possible fragment replacements for a section of the 654921 molecule. Some of the results of these experiments are shown in figure 2, below:
The project reported in this case study was originally presented as a joint poster between Thomson Reuters Scientific and Cresset at the EFMC Conference in Brussels in Sept 2010 Finch, C., Prous, J., Hoffmann, R., Buckley, G., Gardner, S., & Vinter, A.