title: Spherical and tubule nanocarriers for sustained drug release.
abstract: We discuss new trends in Layer-by-Layer (LbL) encapsulation of spherical and tubular cores of 50-150 nm diameter and loaded with drugs. This core size decrease (from few micrometers to a hundred of nanometers) for LbL encapsulation required development of sonication assistant non-washing technique and shell PEGylation to reach high colloidal stability of drug nanocarriers at 2-3mg/mL concentration in isotonic buffers and serum. For 120-170 nm spherical LbL nanocapsules of low soluble anticancer drugs, polyelectrolyte shell thickness controls drug dissolution. As for nanotube carriers, we concentrated on natural halloysite clay nanotubes as cores for LbL encapsulation that allows high drug loading and sustains its release over tens and hundreds hours. Further drug release prolongation was reached with formation of the tube-end stoppers.
authors.affiliation: Institute of Chemistry of New Materials, National Academy of Science of Belarus, Minsk, Belarus.
authors.forename: Tatsiana G
authors.initials: TG
authors.lastname: Shutava
authors.affiliation: Institute of Fundamental Medicine and Biology, Kazan Federal University, Kazan, Republic of Tatarstan, Russian Federation.
authors.forename: Rawil F
authors.initials: RF
authors.lastname: Fakhrullin
authors.affiliation: Institute for Micromanufacturing and Biomedical Engineering Program, Louisiana Tech University, Ruston, LA, USA. Electronic address: ylvov@latech.edu.
authors.forename: Yuri M
authors.initials: YM
authors.lastname: Lvov
mesh_terms: D000538:Aluminum Silicates / Q000008:administration & dosage / Q000737:chemistry; D000818:Animals; D000077215:Clay; D003692:Delayed-Action Preparations / Q000008:administration & dosage / Q000737:chemistry; D004337:Drug Carriers / Q000008:administration & dosage / Q000737:chemistry; D006801:Humans; D049329:Nanostructures / Q000008:administration & dosage / Q000737:chemistry
chemical_list: D000538:Aluminum Silicates; D003692:Delayed-Action Preparations; D004337:Drug Carriers; D000077215:Clay