ABSTRACT
The aim of this work was to formulate chitosan-folate conjugated multi-walled carbon nanotubes for the lung cancer targeted delivery of docetaxel. The chitosan-folate conjugate was synthesized and the conjugation was confirmed by Fourier transform infrared spectroscopy. The multi-walled carbon nanotubes were characterized for their particle size, polydispersity, zeta potential, surface morphology, drug encapsulation efficiency and in vitro release study. The in vitro cellular uptake, cytotoxicity, and cell cycle analysis of the docetaxel/coumarin-6 loaded multi-walled carbon nanotubes were carried out to compare the effectiveness of the formulations. The biocompatibility and safety of chitosan-folate conjugated multi-walled carbon nanotubes was analyzed by lung histopathology in comparison with marketed docetaxel formulation (Docel™) and acylated multi-walled carbon nanotubes. The cellular internalization study shown that the chitosan-folate conjugated multi-walled carbon nanotubes could be easily internalized into the lung cancer cells through a folate receptor-mediated endocytic pathway. The IC50 values exhibited that chitosan-folate conjugated multi-walled carbon nanotubes could be 89-fold more effective than Docel™ in human lung cancer cells (A549 cells).
Subject(s)
Nanotubes, Carbon , Chitosan , Folic Acid , Humans , Lung , Lung NeoplasmsABSTRACT
Brain cancer, up-regulated with transferrin receptor led to concept of transferrin receptor targeted anticancer therapeutics. Docetaxel loaded d-α-tocopherol polyethylene glycol 1000 succinate conjugated chitosan (TPGS-chitosan) nanoparticles were prepared with or without transferrin decoration. In vitro experiments using C6 glioma cells showed that docetaxel loaded chitosan nanoparticles, non-targeted and transferrin receptor targeted TPGS-chitosan nanoparticles have enhanced the cellular uptake and cytotoxicity. The IC50 values of non-targeted and transferrin receptor targeted nanoparticles from cytotoxic assay were found to be 27 and 148 folds, respectively higher than Docel™. In vivo pharmacokinetic study showed 3.23 and 4.10 folds enhancement in relative bioavailability of docetaxel for non-targeted and transferrin receptor targeted nanoparticles, respectively than Docel™. The results have demonstrated that transferrin receptor targeted nanoparticles could enhance the cellular internalization and cytotoxicity of docetaxel via transferrin receptor with improved pharmacokinetics for clinical applications.
Subject(s)
Chitosan/chemistry , Drug Carriers/chemistry , Nanoparticles/chemistry , Taxoids/chemistry , alpha-Tocopherol/chemistry , Animals , Brain Neoplasms/metabolism , Brain Neoplasms/pathology , Cell Line, Tumor , Cell Survival/drug effects , Docetaxel , Drug Carriers/chemical synthesis , Female , Half-Life , Humans , Male , Microscopy, Electron, Scanning , Microscopy, Fluorescence , Nanoparticles/toxicity , Particle Size , Rats , Receptors, Transferrin/metabolism , Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization , Taxoids/pharmacokinetics , Taxoids/toxicityABSTRACT
The aim of this work was to prepare targeted bioadhesive d-α- tocopheryl glycol succinate 1000 (TPGS) micelles containing docetaxel (DTX) for brain targeted cancer therapy. Considering the unique bioadhesive feature of chitosan, herein, we have developed a synergistic transferrin receptor targeted bioadhesive micelles using TPGS conjugated chitosan (TPGS-chitosan), which target the overexpressed transferrin receptors of glioma cells for brain cancer therapy. The micelles were prepared by the solvent casting method and characterized for their particle size, polydispersity, zeta-potential, surface morphology, drug encapsulation efficiency, and in-vitro release. The IC50 values demonstrated transferrin receptor targeted TPGS-chitosan micelles could be 248 folds more effective than Docel™ after 24h treatment with the C6 glioma cells. Further, time dependent bioadhesive cellular uptake study indicated that a synergistic effect was achieved with the chitosan and transferrin in targeted TPGS-chitosan micelles through the biodhesive property of chitosan as well as transferrin receptor mediated endocytosis. The in-vivo pharmacokinetic results demonstrated that relative bioavailability of non-targeted and targeted micelles were 2.89 and 4.08 times more effective than Docel™ after 48h of treatments, respectively.
Subject(s)
Chitosan/chemistry , Drug Delivery Systems/methods , Micelles , Polyethylene Glycols/chemistry , Transferrin/chemistry , alpha-Tocopherol/chemistryABSTRACT
The aim of this work was to formulate RGD-TPGS decorated theranostic liposomes, which contain both docetaxel (DTX) and quantum dots (QDs) for brain cancer imaging and therapy. RGD conjugated TPGS (RGD-TPGS) was synthesized and conjugation was confirmed by Fourier transform infrared (FTIR) spectroscopy and electrospray ionisation (ESI) mass spectroscopy (ESI-MS). The theranostic liposomes were prepared by the solvent injection method and characterized for their particle size, polydispersity, zeta-potential, surface morphology, drug encapsulation efficiency, and in-vitro release study. Biocompatibility and safety of theranostic liposomes were studied by reactive oxygen species (ROS) generation study and histopathology of brain. In-vivo study was performed for determination of brain theranostic effects in comparison with marketed formulation (Docel™) and free QDs. The particle sizes of the non-targeted and targeted theranostic liposomes were found in between 100 and 200nm. About 70% of drug encapsulation efficiency was achieved with liposomes. The drug release from RGD-TPGS decorated liposomes was sustained for more than 72h with 80% of drug release. The in-vivo results demonstrated that RGD-TPGS decorated theranostic liposomes were 6.47- and 6.98-fold more effective than Docel™ after 2h and 4h treatments, respectively. Further, RGD-TPGS decorated theranostic liposomes has reduced ROS generation effectively, and did not show any signs of brain damage or edema in brain histopathology. The results of this study have indicated that RGD-TPGS decorated theranostic liposomes are promising carrier for brain theranostics.
Subject(s)
Brain/drug effects , Drug Carriers , Drug Delivery Systems , Liposomes/chemistry , Taxoids/pharmacology , Theranostic Nanomedicine , Vitamin E/chemistry , Animals , Antineoplastic Agents/administration & dosage , Antineoplastic Agents/pharmacology , Brain Neoplasms/drug therapy , Docetaxel , Drug Liberation , Nanoparticles/administration & dosage , Nanoparticles/chemistry , Quantum Dots , Rats , Rats, Inbred Strains , Reactive Oxygen Species/metabolism , Taxoids/administration & dosageABSTRACT
The aim of this study was to develop multi-walled carbon nanotubes (MWCNT) which were covalently conjugated with transferrin by carbodiimide chemistry and loaded with docetaxel as a model drug for effective treatment of lung cancer in comparison with the commercial docetaxel injection (Docel™). d-Alpha-tocopheryl polyethylene glycol 1000 succinate (TPGS) was used as amphiphilic surfactant to improve the aqueous dispersity and biocompatibility of MWCNT. Human lung cancer cells (A549 cells) were employed as an in-vitro model to access cellular uptake, cytotoxicity, cellular apoptosis, cell cycle analysis, and reactive oxygen species (ROS) of the docetaxel/coumarin-6 loaded MWCNT. The cellular uptake results of transferrin conjugated MWCNT showed higher efficiency in comparison with free C6. The IC50 values demonstrated that the transferrin conjugated MWCNT could be 136-fold more efficient than Docel™ after 24h treatment with the A549 cells. Flow cytometry analysis confirmed that cancerous cells appeared significantly (P<0.05) in the sub-G1 phase for transferrin conjugated MWCNT in comparison with Docel™. Results of transferrin conjugated MWCNT have showed better efficacy with safety than Docel™.
Subject(s)
Drug Delivery Systems/methods , Lung Neoplasms/drug therapy , Nanotubes, Carbon/chemistry , Transferrin/metabolism , A549 Cells , Animals , Apoptosis/drug effects , Bronchoalveolar Lavage Fluid , Cell Cycle/drug effects , Coumarins/chemistry , Docetaxel , Drug Liberation , Endocytosis/drug effects , Flow Cytometry , Humans , Intracellular Space/metabolism , Lung/drug effects , Lung/pathology , Lung Neoplasms/pathology , Microscopy, Atomic Force , Nanotubes, Carbon/ultrastructure , Particle Size , Rats , Reactive Oxygen Species/metabolism , Spectroscopy, Fourier Transform Infrared , Staining and Labeling , Static Electricity , Taxoids/pharmacology , Taxoids/therapeutic use , Thiazoles/chemistryABSTRACT
Oral insulin nanomedicines are effective tools for therapy and management of both Type I and Type II diabetes. This review summarizes the various nanocarriers developed so far in the literature for oral delivery of insulin. It includes lipid-based (i.e., solid lipid nanoparticles and liposomes) and polymeric-based insulin nanomedicines (i.e., chitosan nanoparticles, alginate nanoparticles, dextran nanoparticles and nanoparticles of synthetic polymers) for sustained, controlled and targeted oral delivery of insulin. Mainly, goblet cell-targeting, vitamin B12 receptor-targeting, folate receptor-targeting and transferrin receptor-targeting aspects were focused. Currently, passive and active targeting approaches of oral insulin nanomedicines have improved the oral absorption of insulin and its bioavailability (up to 14%) that produced effective glycaemic control in in vivo models. These results indicate a promising future of oral insulin nanomedicines for the treatment of diabetes.
Subject(s)
Diabetes Mellitus, Type 2/drug therapy , Hypoglycemic Agents/therapeutic use , Insulin/therapeutic use , Nanoparticles/chemistry , Administration, Oral , Biological Availability , Blood Glucose/analysis , Diabetes Mellitus, Type 2/blood , Drug Delivery Systems , Fluorescent Dyes/chemistry , Humans , Hypoglycemic Agents/administration & dosage , Hypoglycemic Agents/pharmacokinetics , Insulin/administration & dosage , Insulin/pharmacokinetics , Liposomes , Polyethylene Glycols/chemistry , Surface Properties , Tissue DistributionABSTRACT
Diagnosis and therapy of brain cancer was often limited due to low permeability of delivery materials across the blood-brain barrier (BBB) and their poor penetration into the brain tissue. This study explored the possibility of utilizing theranostic d-alpha-tocopheryl polyethylene glycol 1000 succinate mono-ester (TPGS) liposomes as nanocarriers for minimally invasive brain-targeted imaging and therapy (brain theranostics). The aim of this work was to formulate transferrin conjugated TPGS coated theranostic liposomes, which contain both docetaxel and quantum dots (QDs) for imaging and therapy of brain cancer. The theranostic liposomes with and without transferrin decoration were prepared and characterized for their particle size, polydispersity, morphology, drug encapsulation efficiency, in-vitro release study and brain theranostics. The particle sizes of the non-targeted and targeted theranostic liposomes were found below 200 nm. Nearly, 71% of drug encapsulation efficiency was achieved with liposomes. The drug release from transferrin conjugated theranostic liposomes was sustained for more than 72 h with 70% of drug release. The in-vivo results indicated that transferrin receptor-targeted theranostic liposomes could be a promising carrier for brain theranostics due to nano-sized delivery and its permeability which provided an improved and prolonged brain targeting of docetaxel and QDs in comparison to the non-targeted preparations.
Subject(s)
Blood-Brain Barrier/chemistry , Brain/metabolism , Brain/physiopathology , Drug Carriers/chemistry , Polyethylene Glycols/chemistry , Taxoids/chemistry , Taxoids/pharmacology , Transferrin/chemistry , Transferrin/pharmacology , Vitamin E/chemistry , Blood-Brain Barrier/metabolism , Brain Neoplasms , Cell Line, Tumor , Chemistry, Pharmaceutical , Docetaxel , Drug Carriers/metabolism , Humans , Liposomes , Permeability , Polyethylene Glycols/pharmacokinetics , Quantum Dots , Taxoids/metabolism , Theranostic Nanomedicine , Transferrin/metabolism , Vitamin E/metabolismABSTRACT
The aim of this work was to develop multi-walled carbon nanotubes (MWCNT), which were coated or covalently conjugated with d-alpha-tocopheryl polyethylene glycol 1000 succinate (TPGS), and loaded docetaxel as a model drug for effective treatment to lung cancer in comparison with the commercial docetaxel injection (Docel™). The human lung cancer cells (A549 cells) were employed as an in-vitro model to access cellular uptake, cytotoxicity, cellular apoptosis, cell cycle analysis, and reactive oxygen species (ROS) study of the docetaxel/coumarin-6 loaded MWCNT. The safety of MWCNT formulations were studied by the measurements of alkaline phosphatase (ALP), lactate dehydrogenase (LDH) and total protein levels in bronchoalveolar lavage (BAL) fluid of rats after the treatments. The IC50 values demonstrated that the TPGS conjugated MWCNT could be 80 folds more effective than Docel™ after 24h treatment with the A549 cells. Flow cytometry analysis confirmed that cancerous cells were appeared significantly (P<0.05) in the sub G1 phase for TPGS conjugated MWCNT. Results of TPGS conjugated MWCNT have showed better efficacy with safety than non-coated or TPGS coated MWCNT and Docel™.
Subject(s)
Nanotubes, Carbon/chemistry , Taxoids/pharmacology , Vitamin E/chemistry , A549 Cells , Alkaline Phosphatase/metabolism , Animals , Antineoplastic Agents/chemistry , Antineoplastic Agents/pharmacokinetics , Antineoplastic Agents/pharmacology , Apoptosis/drug effects , Bronchoalveolar Lavage Fluid/chemistry , Cell Cycle/drug effects , Cell Survival/drug effects , Coated Materials, Biocompatible/chemistry , Coated Materials, Biocompatible/pharmacokinetics , Coated Materials, Biocompatible/pharmacology , Coumarins/chemistry , Docetaxel , Drug Liberation , Humans , L-Lactate Dehydrogenase/metabolism , Lung/drug effects , Lung/metabolism , Lung/pathology , Lung Neoplasms/metabolism , Lung Neoplasms/pathology , Microscopy, Electron, Transmission , Microscopy, Fluorescence , Nanotubes, Carbon/ultrastructure , Rats , Reactive Oxygen Species/metabolism , Spectroscopy, Fourier Transform Infrared , Spectrum Analysis, Raman , Taxoids/chemistry , Taxoids/pharmacokinetics , Thiazoles/chemistryABSTRACT
The aim of this work was to develop targeted polymeric micelles of poly-lactic acid-D-α-tocopheryl polyethylene glycol 1000 succinate (PLA-TPGS), which are assembled along with D-alpha-tocopheryl polyethylene glycol 1000 succinate-transferrin conjugate (TPGS-Tf), and loaded docetaxel (DTX) as a model drug for enhanced treatment of lung cancer in comparison to non-targeted polymeric micelles and DTX injection (Docel™). A549 human lung cancer cells were employed as an in vitro model to access cytotoxicity study of the DTX loaded polymeric micelles. The safety of DTX formulations were studied by the measurement of alkaline phosphatase (ALP), lactate dehydrogenase (LDH) and total protein levels in bronchoalveolar lavage (BAL) fluid of rats after the treatments. The IC50 values demonstrated that the non-targeted and transferrin receptor targeted polymeric micelles could be 7 and 70 folds more effective than Docel™ after 24 h treatment with the A549 cells. Results suggested that transferrin receptor targeted polymeric micelles have showed better efficacy and safety than the non-targeted polymeric micelles and Docel™.
Subject(s)
Micelles , Polyethylene Glycols/chemistry , Polyethylene Glycols/metabolism , Receptors, Transferrin/metabolism , Safety , Succinates/chemistry , Succinates/metabolism , Taxoids/chemistry , Alkaline Phosphatase/metabolism , Animals , Bronchoalveolar Lavage Fluid , Cell Line, Tumor , Docetaxel , Drug Carriers/chemistry , Drug Carriers/metabolism , Drug Carriers/toxicity , Drug Liberation , Female , Humans , L-Lactate Dehydrogenase/metabolism , Male , Particle Size , Polyethylene Glycols/toxicity , Rats , Succinates/toxicity , Taxoids/pharmacology , Transferrin/chemistryABSTRACT
The objective of this work was to formulate paliperidone palmitate-loaded d-alpha-tocopheryl polyethylene glycol 1000 succinate (vitamin E TPGS or TPGS) micelles for improved antipsychotic effect during short-term management of psychotic disorders. Vitamin E TPGS micelles containing paliperidone palmitate were prepared by the solvent casting method and control paliperidone palmitate formulations were prepared by simple sonication method. The prepared micelles and control paliperidone palmitate formulations were evaluated for different parameters. Particle sizes of prepared micelles, control paliperidone palmitate formulations were determined at 25 °C by dynamic light scattering technique and external surface morphology was determined by transmission electron microscopy analysis. The encapsulation efficiency was determined by spectrophotometery. In-vitro release studies of micelles and control formulations were carried out by dialysis bag diffusion method. The particle sizes of the paliperidone palmitate-loaded TPGS micelles were 26.5 nm. About 92% of drug encapsulation efficiency was achieved with micelles. The drug release from paliperidone palmitate-loaded TPGS micelles was sustained for more than 24 h with 40% of drug release. The TPGS product, i.e. paliperidone palmitate-loaded micelles, resulted in nano-sized delivery, solubility enhancement and permeability of the micelles which provided an improved and prolonged anti-psychotic effect in comparison to control paliperidone palmitate formulation.
