Application of different chemometric tools in QSAR study of azolo-adamantanes against influenza A virus

Quantitative relationships between molecular structure and azolo-adamantanes derivatives were discovered by different chemometric tools including factor analysis based multiple linear regressions (FA-MLR), principle component regression analysis (PCRA), and genetic algorithm-partial least squares GA-PLS. The FA-MLR describes the effect of geometrical and quantum indices on enzyme inhibition activity of the studied molecules. The quality of PCRA equation was found to be better than those derived from FA-MLR. GA-PLS analysis indicated that the topological (IC4 and MPC06), constitutional (nf) and geometrical (G (N..S] parameters were the most significant ones on influenza A virus activity. Comparison of the different statistical methods employed revealed that GA-PLS represented superior results and it could explain and predict 85% and 77% of variances in the pIC(50) data, respectively.

Bilateral femoral hypoplasia and maternal diabetes mellitus: case report and review of the literature

The case of a 21-week fetus with bilateral femoral hypoplasia and bowing related to maternal diabetes mellitus is reported. The femoral middiaphysis (site of hypoplasia and bowing) showed intramembranous ossification instead of the normal endochondral ossification, thus pointing to a transient inhibition of chondrogenesis of the mesenchymal femoral model as the causative mechanism. This finding is correlated with the recent experimental advances in the field of limb development in vertebrates.