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Pulmonary delivery of anti-cancer drugs in the form of nanoparticulate dry powders is considered a promising modality for treating lung cancer. However, it is not known whether the pharmacodynamics and pharmacokinetics of nano-preparations are altered after co-spray drying. In this study, we compared the physicochemical property, anti-cancer activity, tumor targeting and pharmacokinetic behavior of docetaxel-loaded folic acid-conjugated liposomes (LPs-DTX-FA) with those of dry powder prepared by co-spray-drying LPs-DTX-FA. The particle size and PDI after re-dispersion of the powder were increased. The re-dispersed liposomes showed increased cellular uptake via micropinocytosis and exhibited higher cytotoxicity than LPs-DTX-FA. Tumor targeting of re-dispersed liposomes was less effective compared with LPs-DTX-FA but the metabolism of re-dispersed liposomes was decreased. Tracheal administration resulted in a 45-fold higher concentration of docetaxel in the lung of Sprague Dawley rats at 30 min as compared with intravenous administration. Our results indicate that co-spray drying did change the properties, while tracheal administration of the dry powder provided higher drug exposure at the tumor site without increasing the exposure of other organs. Thus, inhaled dry powders might be clinically effective for treatment of lung cancer.
This article was published in the following journal.
Name: Pulmonary pharmacology & therapeutics
The United States Food and Drug Administration (FDA) required all enriched cereal grains to be fortified with folic acid in 1998. In April 2016, the FDA published regulations allowing voluntary fortif...
Ideal nanoscale drug delivery system (DDS) should be biocompatible, having targeted recognition and controlled release properties. In this work, monodispersed, doxorubicin (Dox) loaded chitosan (Cts) ...
The pathogenesis and progression of several lung disorders is propagated by inflammatory and oxidative processes which can be controlled by adjunctive inhaled therapies. The present study aimed to dev...
Tumor-targeting micelles for the delivery of paclitaxel (PTX) were developed based on folic acid and α-tocopherol succinate conjugated hyaluronic acid (FA-HA-TOS). The conjugate FA-HA-TOS was synthes...
Folic acid supplementation prevents 50 - 75% of cases of neural tube defects. This study evaluated the folic acid supplementation after oral administration of the ethinyl estradiol 0.02 mg + levonor...
The purpose of the study is to determine the bioavailability of orally administered folic acid compared with the i.v. administered folic acid, and to use the samples collected to validate ...
The purpose of the study is to determine the bioequivalence of Norgestimate (NGM) and Ethinyl Estradiol (EE) in 2 formulations of 250 mcg NGM/25 mcg EE, 1 without folic acid and 1 containi...
High levels of homocysteine, which is an amino acid in the blood, have been linked to an increased risk of heart disease. This study will examine the effect that differing levels of folic ...
The purpose of this study is to determine whether folic acid, alone or together with creatine supplementation, can lower blood arsenic concentrations and improve the ability to detoxify ar...
The purpose of this study is to determine whether daily oral supplements of vitamin B complex along with folic acid or supplements of iron plus folic acid given to women during peri-concep...
The active metabolite of FOLIC ACID. Leucovorin is used principally as its calcium salt as an antidote to folic acid antagonists which block the conversion of folic acid to folinic acid.
Cell surface receptors that bind to and transport FOLIC ACID, 5-methyltetrahydrofolate, and a variety of folic acid derivatives. The receptors are essential for normal NEURAL TUBE development and transport folic acid via receptor-mediated endocytosis.
Derivatives of folic acid (pteroylglutamic acid). In gamma-glutamyl linkage they are found in many tissues. They are converted to folic acid by the action of pteroylpolyglutamate hydrolase or synthesized from folic acid by the action of folate polyglutamate synthetase. Synthetic pteroylpolyglutamic acids, which are in alpha-glutamyl linkage, are active in bacterial growth assays.
A nutritional condition produced by a deficiency of FOLIC ACID in the diet. Many plant and animal tissues contain folic acid, abundant in green leafy vegetables, yeast, liver, and mushrooms but destroyed by long-term cooking. Alcohol interferes with its intermediate metabolism and absorption. Folic acid deficiency may develop in long-term anticonvulsant therapy or with use of oral contraceptives. This deficiency causes anemia, macrocytic anemia, and megaloblastic anemia. It is indistinguishable from vitamin B 12 deficiency in peripheral blood and bone marrow findings, but the neurologic lesions seen in B 12 deficiency do not occur. (Merck Manual, 16th ed)
Proteins involved in the transport of FOLIC ACID and folate derivatives across the CELLULAR MEMBRANE.
Lung cancer is the uncontrolled cell growth in tissues of the lung. Originating in the lungs, this growth may invade adjacent tissues and infiltrate beyond the lungs. Lung cancer, the most common cause of cancer-related death in men and women, is respons...
Pulmonary relating to or associated with the lungs eg Asthma, chronic bronchitis, emphysema, COPD, Cystic Fibrosis, Influenza, Lung Cancer, Pneumonia, Pulmonary Arterial Hypertension, Sleep Disorders etc Follow and track Lung Cancer News ...
Cancer is not just one disease but many diseases. There are more than 100 different types of cancer. Most cancers are named for the organ or type of cell in which they start - for example, cancer that begins in the colon is called colon cancer; cancer th...