Selvaraj Kunjiappan

Graph Theoretical Analysis, Insilico Modeling and Formulation of Pyrimidine Nanoparticles as p38α MAP Kinases inhibitors: A Quantitative Proteomics Approach

In this study, the optimized 4-(4-hydroxybenzyl)-2-amino-6-hydroxypyrimidine-5-carboxamide derivative was formulated as nanoparticles to evaluate for their anticancer activity. The response surface methodology (RSM) was performed with utilization of Box-Behnken statistical design (BBSD) to optimize the experimental conditions for identification of significant synthetic methodology. To explore the stability of the derivative was done by density functional theory (DFT). Graph theoretical analysis was introduced to identify the drug target p38α MAP Kinases and then insilico modeling was performed to provide straightforward information for further structural optimization. The experimental results under optimal experimental conditions obtained 74.55-76% yield of 4-(4-hydroxybenzyl)-2-amino-6-hydroxypyrimidine-5-carboxamide, 127oC melting point and Rf value 0.59 were well matched with the predicted results and this was gaining 95% of confidence level and suitability of RSM. The spectral data were reliable with the assigned structures of synthetic yields. The formulated nanoparticles were exhibited a good anticancer activity against used cancer cell line MCF7. Amusingly the observed docking scores and in-vitro anticancer activity was proving the compound significance and potential as a potent p38α inhibitor. Further, we have elucidated the mechanism of action at its functional level using label-free quantitative proteomics. Interestingly the observed results were indicating that the derived proteomics data involving in the alteration process in cancer-related regulatory pathways.

Design, graph theoretical analysis, density functionality theories, Insilico modeling, synthesis, characterization and biological activities of novel thiazole fused quinazolinone derivatives

Hit, Lead & Candidate Discovery

Design, Graph Theoretical Analysis and Insilico Modeling of Dunaliella bardawil Biomass Encapsulated N-Succinyl Chitosan Nanoparticles for Enhanced Anticancer Activity

PURPOSE To investigate N-succinyl chitosan nanoparticles (NSC NPs) encapsulation with Dunaliella bardawil (D. bardawil) biomass for high utilization enhanced effectiveness and least side effects for anticancer activity. METHODS The potential bioactive compounds from D. bardawil biomass were encapsulated NSC NPs by ionotropic gelation method and to characterize its molecular shape, particle size, stability and polydispersity index using FTIR, XRD, SEM, TEM and Zetasize Nano analyzer. Signaling pathway analysis, molecular docking study and in vitro anticancer screening were performed on chosen H-RasP21, 721P and liver cancer cell lines (HepG2), respectively. RESULTS The D. bardawil biomass majorly contains 6 bioactive compounds such as β-carotene, lutein, zeaxanthin, phytoene, canthaxanthin, and phytofluene were identified by LC-MS. The D. bardawil biomass encapsulated NSC NPs showed an average particle size of 80±5.6 nm in spherical shape, crystalline nature, zeta potential of -32±2.7 mV and polydispersity index of 0.51±0.02. Interestingly, the identified target using graph theoretical signaling pathway analysis and molecular docking study showed strong interaction of NSC NPs in binding pockets of H-RasP21 protooncogene. At 50μg/mL, NPs displayed 95.60% cytotoxicity in HepG2 cell line. The apoptotic cell cycle analysis showed cell death for 24 h and 48 h representing 13.13% and 47.04%, respectively. CONCLUSION The highly cross-linked, biocompatible, biodegradable, nontoxic NSC NPs promising carrier for delivery of bioactive molecules present in the D. bardawil biomass was found to be actively involved in deregulation of cellular growth in targeted cancer cells. Thus active NPs serve as a novel nanodrug to enhance the controlled; site specific drug delivery in the management of cancer.

Nanotechnology and nanocarrier-based approaches on treatment of degenerative diseases

Degenerative diseases are results of deterioration of cells and tissues with aging either by unhealthy lifestyle or normal senescence. The degenerative disease likely affects central nervous system and cardiovascular system to a great extent. Certain medications and therapies have emerged for the treatment of degenerative diseases, but in most cases bearing with poor solubility, lower bioavailability, drug resistance, and incapability to cross the blood–brain barrier (BBB). Hence, it has to be overcome with conventional treatment system; in this connection, nanotechnology has gained a great deal of interest in recent years. Moreover, nanotechnology and nanocarrier-based approach drug delivery system could revolutionize the treatment of degenerative diseases by faster absorption of drug, targeted interaction at specific site, and its release in a controlled manner into human body with minimal side effects. The core objective of this review is to customize and formulate therapeutically active molecules with specific site of action and without affecting other organs and tissues to obtain effective result in the improvement of quality of health. In addition, the review provides a concise insight into the recent developments and applications of nanotech and nanocarrier-based drug delivery for the treatment of various degenerative diseases.

Graph Theoretical Analysis, In Silico Modeling, Synthesis, Anti-Microbial and Anti-TB Evaluation of Novel Quinoxaline Derivatives

BACKGROUND We designed to synthesize a number of 2-(2-(substituted benzylidene) hydrazinyl)-N-(4-((3-(phenyl imino)-3,4-dihydro quinoxalin-2(1 H)-ylidene)amino) phenyl) acetamide S1-S13: with the hope to obtain more active and less toxic anti-microbial and anti-TB agents. METHODS A series of novel quinoxaline Schiff bases S1-S13: were synthesized from o-phenylenediamine and oxalic acid by a multistep synthesis. In present work, we are introducing graph theoretical analysis to identify drug target. In the connection of graph theoretical analysis, we utilised KEGG database and Cytoscape software. All the title compounds were evaluated for their in-vitro anti-microbial activity by using agar well diffusion method at three different concentration levels (50, 100 and 150 µg/ml). The MIC of the compounds was also determined by agar streak dilution method. RESULTS The identified study report through graph theoretical analysis were highlights that the key virulence factor for pathogenic mycobacteria is a eukaryotic-like serine/threonine protein kinase, termed PknG. All compounds were found to display significant activity against entire tested bacteria and fungi. In addition the synthesized scaffolds were screened for their in vitro antituberculosis (anti-TB) activity against Mycobacterium tuberculosis (Mtb) strain H37Ra using standard drug Rifampicin. CONCLUSION A number of analogs found markedly potent anti-microbial and anti-TB activity. The relationship between the functional group variation and the biological activity of the evaluated compounds were well discussed. The observed study report was showing that the compound S6: (4-nitro substitution) exhibited most potent effective anti-microbial and anti-TB activity out of various tested compounds.