1.Design, synthesis and biological evaluation of 6-substituted pyrrolo[2,3-d]pyrimidines as dual inhibitors of TS and AICARFTase and as potential antitumor agents.
Liu Y1, Li M2, Zhang H2, Yuan J2, Zhang C2, Zhang K2, Guo H1, Zhao L1, Du Y2, Wang L3, Ren L4. Eur J Med Chem. 2016 Jun 10;115:245-56. doi: 10.1016/j.ejmech.2016.03.032. Epub 2016 Mar 21.
A new series of 2-amino-4-oxo-6-substituted pyrrolo[2,3-d]pyrimidines, with an isosteric replacement of the side chain amide moiety to a sulfur atom, were designed and synthesized as multitargeted antifolates as well as potential antitumor agents. Starting from previously synthesized 2-amino-4-oxo-pyrrolo[2,3-d]pyrimidin-6-yl-acetic acid, a reduction by lithium triethylborohydride and successive mesylation afforded the key mesylate. Nucleophilic substitution by mercaptoacetic or mercaptopropionic acid methyl esters, followed by hydrolysis and condensation with pyridinyl-methylamines provided the nonclassical compounds 1-6, whereas condensation with glutamic acid diethyl ester hydrochloride and saponification afforded the classical analogs 7-8. All target compounds exhibited inhibitory activities toward KB, SW620 and A549 tumor cell lines. The most potent compounds of this series, 7 and 8, are better inhibitors against A549 cells than methotrexate (MTX) and pemetrexed (PMX).
2.A Gamma Scintigraphy study to investigate uterine targeting efficiency of Raloxifene loaded Liposomes administered intravaginally in New Zealand white female rabbits.
Patel A1, Tyagi A2, Sharma RK2, Thakkar H1. Drug Deliv. 2016 Apr 12:1-36. [Epub ahead of print]
CONTEXT: Raloxifene Hydrochloride (RLH), a selective estrogen receptor modulator, shows antiproliferative and apoptotic effects on Leiomyoma. Its extensive first pass metabolism leads to oral bioavailability of 2%.
3.The ultra-performance liquid chromatography tandem mass spectrometry method for detection and quantification of C4NP in rat plasma and its application to pharmacokinetic studies.
You J1, Wang L1, Yang F, Shang J1. Curr Oncol. 2016 Feb;23(1):e8-e16. doi: 10.3747/co.23.2842. Epub 2016 Feb 18.
INTRODUCTION: Combretastatins, which are excellent anticancer agents, are isolated from Combretum. A sensitive ultra-performance liquid chromatography tandem mass spectrometry method was developed and validated for the pharmacokinetic study of a combretastatin analog (C4NP) in rats.
4.Polyelectrolyte complex of vancomycin as a nanoantibiotic: Preparation, in vitro and in silico studies.
Sikwal DR1, Kalhapure RS1, Rambharose S1, Vepuri S1, Soliman M1, Mocktar C1, Govender T2. Mater Sci Eng C Mater Biol Appl. 2016 Jun 1;63:489-98. doi: 10.1016/j.msec.2016.03.019. Epub 2016 Mar 9.
Delivery of antibiotics by various nanosized carriers is proving to be a promising strategy to combat limitations associated with conventional dosage forms and the ever-increasing drug resistance problem. This method entails improving the pharmacokinetic parameters for accumulation at the target infection site and reducing their adverse effects. It has been proposed that antibiotic nanoparticles themselves are more effective delivery system than encapsulating the antibiotic in a nanosystem. In this study, we report on nanoparticles of vancomycin (VCM) by self-assembled amphiphilic-polyelectrolyte complexation between VCM hydrochloride and polyacrylic acid sodium (PAA). The size, polydispersity index and zeta potential of the developed nanoplexes were 229.7±47.76nm, 0.442±0.075, -30.4±5.3mV respectively, whereas complexation efficiency, drug loading and percentage yield were 75.22±1.02%, 58.40±1.03% and 60.60±2.62% respectively. An in vitro cytotoxicity study on three mammalian cell lines using MTT assays confirmed the biosafety of the newly formulated nanoplexes.
