Pharmacophore modelling, virtual screening and molecular docking studies on PLD1 inhibitors

Lipid metabolism plays a significant role in influenza virus replication and subsequent infection. The regulatory mechanism governing lipid metabolism and viral replication is not properly understood to date, but both Phospholipase D (PLD1 and PLD2) activities are stimulated in viral infection. In vitro studies indicate that chemical inhibition of PLD1 delays viral entry and reduction of viral loads. The current study reports a three-dimensional pharmacophore model based on 35 known PLD1 inhibitors. A sub-set of 25 compounds was selected as the training set and the remaining 10 compounds were kept in the test set. One hundred and twelve pharmacophore models were generated; a six-featured pharmacophore model (AADDHR.57) with survival score (2.69) produced a statistically significant three-dimensional quantitative structure-activity relationship model with r² = 0.97 (internal training set), r² = 0.71 (internal test set) and Q² = 0.64. The predictive power of the pharmacophore model was validated with an external test set (r² = 0.73) and a systematic virtual screening work-flow was employed showing an enrichment factor of 23.68 at the top 2% of the dataset (active and decoys). Finally, the model was used for screening of the filtered PubChem database to fetch molecules which can be proposed as potential PLD1 inhibitors for blocking influenza infection.

Use of an inclusive-partnership strategy in urban areas of Orissa, India, to increase compliance in a mass drug administration for the control of lymphatic filariasis

In India, the programme to eliminate lymphatic filariasis, which is largely based on mass administrations of diethylcarbamazine, has, in terms of coverage and compliance, been generally much less successful in urban areas than in rural communities. An innovative strategy to make the programme more effective in urban settings, largely based on an inclusive partnership and community participation, has recently been developed. An evaluation of the strategy's implementation in Orissa, which employed both quantitative and qualitative methods of data collection, revealed significantly higher coverage and compliance in an urban area where the strategy had been implemented than in a similar urban area where there had been no such intervention. Application of this strategy in other urban settings in general, and in small towns in particular, is recommended in India.