Dendrimer

ABSTRACTProstate cancer is an androgen-dependent disease that responds to established therapies that reduce circulating testosterone levels or inhibit androgen binding to the androgen receptor. This has resulted in the development of a variety of new drugs that target this hormone-regulated transcription factor. Oral enzalutamide drug is a potent androgen receptor antagonist inhibitor for the treatment of castration-resistant prostate cancer, but enzalutamide is classified as BCS class II substances with low aqueous solubility. In recent decades, dendrimers have proven to be effective as solubilizers. Due to their special qualities, dendritic macromolecule is an effective drug solubilizing agent. Therefor the current work is to improve the solubility of enzalutamide by using hydroxy-terminated dendritic macromolecules. The potential of nanoscale hydroxy-terminated dendritic macromolecules TG1.0, TG2.0 and TG3.0 as enzalutamide solubility enhancers was investigated. The effect of concentration and generation of synthesized dendritic macromolecules on enzalutamide solubility was investigated. The FT-IR spectra were used to characterize the formation of complexes between drug molecules and dendritic macromolecules. The experimental results revealed that enzalutamide solubility increased with dendrimer concentration and generation. The cytotoxicity and hemolytic potential of synthesized hydroxy-terminated dendritic macromolecules excelled over commercially available polyamidoamine dendrimers (PAMAM) in a cytotoxicity assay using A-549 lung cancer cell lines. Keywords: Enzalutamide, Cytotoxicity, Dendrimer, Hemolysis, Solubility

ABSTRACTDomperidone (DOM), an antidopaminergic medication, is primarily used as an antiemetic to treat nausea and vomiting caused by a variety of etiologies. It is very insoluble in water and has a poor oral bioavailability of 13-17%. The objective of the current work is to increase domperidone aqueous solubility using nano-structured hydroxy-terminated dendrimers. Dendrimers are distinctive carriers for drug solubilization because of their many special characteristics in terms of size, shape, branching length, and surface functioning. Dendrimers have unique properties that make them potential carriers for many active medicinal compounds due to their structural adaptability. The potential of hydroxy-terminated dendrimers UG1.0, UG2.0, and UG3.0 as solubility enhancers for domperidone was investigated. The effect of concentration and generation of synthesized nano-structured dendritic macromolecules on the solubility of domperidone was studied. The formation of the complexes between domperidone drug molecules and dendrimers was characterized by the FT-IR spectra. The experimental results showed that the solubility of the domperidone was approximately proportional to dendrimer concentration and generation. The water solubility of domperidone has been increased as generation of the hydroxy-terminated dendrimer. Cytotoxicity assay using A-549 lung cancer cell lines and hemolysis results revealed that synthesized dendritic macromolecules are more biocompatible than commercially available polyamidoamine dendrimers (PAMAM). Keywords: Antiemetic, Cytotoxicity, Dendrimer, Domperidone, Hemolysis, Phase solubility.

Recent approaches in molecular modeling simulation techniques and interaction studies have allowed accurate predictions of dendrimer dimensions, contour, and relations with drugs, biosensors, and conformational behavior of peptides, vectors as well as many others. This paper shows docking and dynamics of pharmacological screening of dendrimers in different therapeutic studies from various peer reviewed published data. Anti-inflammatory studies enable the computational learn of connections of the unchanged dendrimer, glucosamine, and of the partially glycosylated dendrimer with Toll-like receptor and Myeloid differentiation factor. Anti-tumor studies including biogenic polyamines, show stronger similarity toward dendrimers than those of artificial polyamines suggesting that dendrimers can act as transporter vehicle for deliver antitumor polyamine analogues to goal tissues. Ployamidoamine modified Gallium nitride nanowires provide great density of docking location to immobilize crucial number of probe Deoxyribonucleic acid covalently. Molecular docking studies exposed that the β-sitosterol can bind in the great hydrophobic hollow of Human Serum Albumin. Simulation have manifested that the hydrophobic interactions, hydrogen-bond interactions, and electrostatic appeal play critical roles in the pattern of dendrimer–drug complexes. In case of Small interfering Ribonucleic acid simulations reveal that the time taken for the dendrimer-gene complex (dendriplex) to reach equilibrium is appreciably longer at low pH and this is accompanied by more compact packaging of the dendriplex, as compared to simulations performed at neutral pH. Due to their possible use in various disease studies, molecular modeling with dendrimer complex configuration are chief choice in manipulating better drug carriers and tackle issues that are difficult in laboratory experiment.