Abstract:
:The objective of this work was to investigate the main theological features of vaginal hydrophilic polymer gels and to elucidate about the relationship between these characteristics and gels composition, and their general influence in therapeutic/usage purpose. Flow and dynamic oscillatory properties of four commercially available (Conceptrol, Gynol II, RepHresh, and Replens) and two investigational vaginal gels were determined by cone-and-plate rheometry, at body temperature. Several parameters (apparent viscosity, complex viscosity, storage modulus, loss modulus, critical oscillatory stress, tan delta, thixotropy and yield stress) were measured and/or calculated. Gels presented non-Newtonian, pseudoplastic, thixotropic behavior, with yield stress. Overall viscosities varied between 13500 Pa.s and approximately 80 Pa.s within a biologically relevant shear rate interval (0.01-100 s(-1)). Yield stress values were variable between different determination methods but coherent in terms of ranking. Also, tested gels showed viscoelastic properties, being characterized by predominant elastic solid-like behavior. Rheological behavior of vaginal gels strongly depended on the type of gelling agent used, which potentially influences their spreading and retention properties when administered in the vaginal canal. Small variations in gels composition can result in substantial changes in their features, namely viscosity, yield stress and thixotropy. Rheological properties of tested gels appeared to be correlated with their therapeutic/usage purpose.
journal_name
Curr Drug Delivjournal_title
Current drug deliveryauthors
das Neves J,da Silva MV,Gonçalves MP,Amaral MH,Bahia MFdoi
10.2174/156720109787048294subject
Has Abstractpub_date
2009-01-01 00:00:00pages
83-92issue
1eissn
1567-2018issn
1875-5704journal_volume
6pub_type
杂志文章abstract:OBJECTIVES:In this study, central composite factorial design was used for the preparation and optimization of chitosan/Na-alginate hydrogel films containing metformin via solvent evaporation technique. METHODS:Low and high molecular weight (MW) chitosan was used as a polymer in different concentrations while genipin w...
journal_title:Current drug delivery
pub_type: 杂志文章
doi:10.2174/1567201815666180409102459
更新日期:2018-01-01 00:00:00
abstract::Gene therapy has the potential to treat both acquired and inherited genetic diseases. Generally, two types of gene delivery vectors are used - viral vectors and non-viral vectors. Non-viral gene delivery systems have attracted significant interest (e.g. 115 gene therapies approved for clinical trials in 2018; clinical...
journal_title:Current drug delivery
pub_type: 杂志文章,评审
doi:10.2174/1567201816666190529072914
更新日期:2019-01-01 00:00:00
abstract::The objective of the present research is to prepare stable nano suspensions of Valsartan (VAL) with high solubility and dissolution. VAL is an orally administered anti-hypertensive drug with lower bio-availability of 25%, this is attributed to its lower aqueous solubility (0.082 mg/ml). VAL nano suspensions were prepa...
journal_title:Current drug delivery
pub_type: 杂志文章
doi:10.2174/1567201812666150724094358
更新日期:2016-01-01 00:00:00
abstract:AIM:This study was focused on the formulation of the multi-unit extended-release peroral delivery device of lamotrigine for better management of epilepsy. BACKGROUND:The single-unit extended-release peroral preparations often suffer from all-or-none effect. A significant number of multi-unit delivery systems have been...
journal_title:Current drug delivery
pub_type: 杂志文章
doi:10.2174/1567201817666200317124022
更新日期:2020-01-01 00:00:00
abstract:OBJECTIVE:The present study reports the use of MicrofluidizerTM technology to form a stable nanosuspension of atovaquone (ATQ) using quality by design (QbD) approach. METHODS:The patient-centric quality target product profile and critical quality attributes (CQAs) were identified. A Box-Behnken design was employed for...
journal_title:Current drug delivery
pub_type: 杂志文章
doi:10.2174/1567201817666191227095019
更新日期:2020-01-01 00:00:00
abstract:BACKGROUND:One of the major abundant proteins in the nucleous is nucleolin that overexpressed on the cytoplasmic membrane of malignant and endothelial cells and makes it as a promising condidate for targeted drug delivery. OBJECTIVES:In this study, doxorubicin (Dox) as a chemotherapy drug was entrapped into the Poly l...
journal_title:Current drug delivery
pub_type: 杂志文章
doi:10.2174/1567201815666180724104451
更新日期:2018-01-01 00:00:00
abstract:BACKGROUND:Chrysin is a strong inhibitor of breast cancer resistance protein (BCRP) but it is practically insoluble in water. Effective solubilization of chrysin is critical for its pharmaceutical application as an absorption enhancer via inhibition of BCRP-mediated drug efflux. OBJECTIVE:This study aimed to develop a...
journal_title:Current drug delivery
pub_type: 杂志文章
doi:10.2174/1567201815666180924151458
更新日期:2019-01-01 00:00:00
abstract::Methylene blue (MB) has been shown to slow down the progression of the Alzheimer's disease (AD) and other tauopathies; however distribution of MB into the brain is limited due its high hydrophilicity. In this study, we aimed to prepare novel hydrophobic glutathione coated PLGA nanoparticles to improve bioavailability ...
journal_title:Current drug delivery
pub_type: 杂志文章
doi:10.2174/1567201810666131113102037
更新日期:2014-01-01 00:00:00
abstract::The interaction of a series of amphiphilic 2-alkyl aminoacids (lipoamino acids, LAAs) with different cell cultures and biomembrane models was investigated. LAAs can be useful promoieties to modify the physico-chemical properties of many drugs, and in particular their lipophilicity. Tests were performed in vitro on mam...
journal_title:Current drug delivery
pub_type: 杂志文章
doi:10.2174/156720107780362348
更新日期:2007-04-01 00:00:00
abstract::In the present study, cross linked sodium carboxymethylated pea starch (SCPS) was synthesized and evaluated as tablet superdisintegrant in diclofenac sodium based tablets. SCPS was synthesized using native pea starch with monochloroacetic acid and NaOH in microwave radiation environment. Finally the dried product was ...
journal_title:Current drug delivery
pub_type: 杂志文章
doi:10.2174/156720111794479853
更新日期:2011-03-01 00:00:00
abstract:BACKGROUND:The management of TB is difficult due to the resistance developed by Mycobacterium tuberculosis against anti-tubercular drugs causes the new challenges for treating and managing the disease. OBJECTIVE:The objective of the study was to combat multiple drug resistance (MDR) exhibited by mycobacterium species ...
journal_title:Current drug delivery
pub_type: 杂志文章
doi:10.2174/1567201813666160502124811
更新日期:2016-01-01 00:00:00
abstract:BACKGROUND:Tuberculosis is an infection and caused by gentle growing bacteria. The Internet provides opportunities for people with tuberculosis (TB) to connect with one another to address these challenges. OBJECTIVE:The aim of this paper is to introduce readers to the platforms on which Tuberculosis participants inter...
journal_title:Current drug delivery
pub_type: 杂志文章,评审
doi:10.2174/1567201814666171120125916
更新日期:2018-01-01 00:00:00
abstract:BACKGROUND:Levofloxacin is a potent antibiotic with severe side effects due to its high doses. Bacterial resistance may be due to frequent use of antibiotics. Biogenic gold nanoparticles conjugated levofloxacin (Au-HSA-LvN-NPs) were developed by Human Serum Albumin (HSA) and nitrate reductasemediated pathways. METHODS...
journal_title:Current drug delivery
pub_type: 杂志文章
doi:10.2174/1567201814666170316113432
更新日期:2017-01-01 00:00:00
abstract::Fast-dissolving drug delivery systems have been developed as an alternative to conventional dosage form as an oral means of drug delivery in case of chronic conditions. Now a day's fast dissolving films are preferred over conventional tablets and capsules for masking the taste of bitter drugs to increase the patient c...
journal_title:Current drug delivery
pub_type: 杂志文章,评审
doi:10.2174/156720111795768022
更新日期:2011-07-01 00:00:00
abstract:BACKGROUND:Amphotericin B eye drops are widely used in the treatment of ocular infections. However, amphotericin's toxicity leads to low patient compliance and aggravation of symptoms. This work describes the development of a microemulsion system containing amphotericin B, aiming for its use in ocular applications. ME...
journal_title:Current drug delivery
pub_type: 杂志文章
doi:10.2174/1570159x14666151109110734
更新日期:2016-01-01 00:00:00
abstract:BACKGROUND:Cystic Fibrosis (CF) is a genetic disease which affects the patient's lungs, pancreas, liver, kidney and intestine and lacks sulfatase enzyme, leading to mucopolysaccharidosis. Colistin sulfate acts by interacting with phospholipids of bacterial cell membranes. Sulfatase enzyme reduces the high levels of sul...
journal_title:Current drug delivery
pub_type: 杂志文章
doi:10.2174/1567201817666200122160110
更新日期:2020-01-01 00:00:00
abstract::Recent studies have focused on the potential use of metal-based complexes for the treatment of cancer. However, there are some limitations of metal-based ligands for the treatment of cancer due to their toxic effects. In the present study, a novel bimetallic Cu(II) complex, [Cu2(μ-(C6H5)2CHCOO)3 (bipy)2)](ClO4), has f...
journal_title:Current drug delivery
pub_type: 杂志文章
doi:10.2174/1567201813666160111123739
更新日期:2016-01-01 00:00:00
abstract::Biphenyl Dimethyl Dicarboxylate (BDD) is insoluble in aqueous solution and the bioavailability after oral administration is low. Self-nanoemulsifying drug delivery system (SNEDDS) containing BDD has been successfully prepared using carefully selected ingredients which are less affected by pH and ionic strength changes...
journal_title:Current drug delivery
pub_type: 杂志文章
doi:10.2174/156720108784911695
更新日期:2008-07-01 00:00:00
abstract:BACKGROUND:Essential oils are poor aqueous solubility and high volatility compounds. The encapsulation of essential oils with cyclodextrins (CDs) can protect them from the adverse environmental conditions and improve their stability. Therefore, increasing the functional capabilities of essential oils when they were use...
journal_title:Current drug delivery
pub_type: 杂志文章
doi:10.2174/1567201817666200731164902
更新日期:2020-07-31 00:00:00
abstract:BACKGROUND:Colloidal systems are most prominent delivery systems mainly used as vehicles for the transportation, targeting the various types of biomolecules, proteins, peptides, synthetic medicinal agents. OBJECTIVE:To provide concise information on patents that are directly or indirectly related to the nanoemulsions....
journal_title:Current drug delivery
pub_type: 杂志文章,评审
doi:10.2174/1567201812666150901111930
更新日期:2016-01-01 00:00:00
abstract:BACKGROUND:Cabazitaxel (CBZ) is a new taxane approved by FDA for treatment of castration- resistant prostate cancer not responding to docetaxel. However, CBZ is not a suitable substrate for p-glycoprotein 60, an efflux pump which transports anticancer drugs out of malignant cells and is therefore a promising drug for t...
journal_title:Current drug delivery
pub_type: 杂志文章
doi:10.2174/1567201814666161122150302
更新日期:2017-01-01 00:00:00
abstract:BACKGROUND:Nasal delivery of 20 (R) -ginsenoside Rg3 (Rg3) has a short-lived anti-fatigue effect owing to rapid clearance by nasal cilia. Thus, in order to extend the residence time of Rg3 in the nasal cavity, a new drug delivery system is needed. METHODS:Chitosan microspheres loaded with Rg3 were prepared using a mul...
journal_title:Current drug delivery
pub_type: 杂志文章
doi:10.2174/1567201814666161109121151
更新日期:2017-09-06 00:00:00
abstract::The aim of the present work is the development and evaluation of solid lipid nanoparticles (SLNs) as carrier system for topical delivery of benzocaine (BZC) improving its local anesthesia aiming to produce a fast acting and long lasting topical formulation. BZC loaded SLNs were prepared using a full factorial design t...
journal_title:Current drug delivery
pub_type: 杂志文章
doi:10.2174/1567201812666150703115126
更新日期:2015-01-01 00:00:00
abstract:BACKGROUND:Mesoporous bioactive glass (MBG) has been widely studied because of its excellent histocompatibility and degradability. However, due to the lack of good osteoinductive activity, the pure MBG scaffold is not effective in repairing large-scale bone defects. OBJECTIVE:To observe the repair effect of MBG scaffo...
journal_title:Current drug delivery
pub_type: 杂志文章
doi:10.2174/1567201817666200916091253
更新日期:2020-09-15 00:00:00
abstract::In recent years, Poloxamers had attracted a particular interest in the design of dermal and transdermal delivery systems in order to improve or retard drug permeation through the skin. In the present study, the influence of different parameters, such as, temperature, storage time, type of polymer (Lutrol(®) F-127 and ...
journal_title:Current drug delivery
pub_type: 杂志文章
doi:10.2174/15672018113109990056
更新日期:2013-12-01 00:00:00
abstract:PURPOSE:Present investigation was aimed to fabricate nanocrystal of exemestane, an anticancer drug with poor dissolution properties and oral bioavailability. METHODS:Influence of various process parameters on the formulation of exemestane nanosuspension using media milling technique were investigated in the trial batc...
journal_title:Current drug delivery
pub_type: 杂志文章
doi:10.2174/1567201818999210112190716
更新日期:2021-01-12 00:00:00
abstract::The present study performed by preparation and evaluation of floating tablets of Acyclovir as model drug for prolongation of gastric residence time. Floating effervescent tablets were formulated by various materials like hydroxypropyl methylcellulose K 4M, K 15M, psyllium husk, swelling agent as crospovidone and micro...
journal_title:Current drug delivery
pub_type: 杂志文章
doi:10.2174/156720109789941678
更新日期:2009-10-01 00:00:00
abstract::Conventional eye drops show relatively low bioavailability due to poor precorneal contact time. In situ hydrogels are of great importance in providing sustained ocular drug delivery. By exhibiting elastic properties they resist ocular drainage of the drug leading to longer contact times. In the present study an in sit...
journal_title:Current drug delivery
pub_type: 杂志文章
doi:10.2174/156720110791560928
更新日期:2010-07-01 00:00:00
abstract::The objective of the present study was to fabricate and evaluate a multiparticulate oral gastroretentive dosage form of baclofen characterized by a central large cavity (hollow core) promoting unmitigated floatation with practical applications to alleviate the signs and symptoms of spasticity and muscular rigidity. So...
journal_title:Current drug delivery
pub_type: 杂志文章
doi:10.2174/1567201811666140414113838
更新日期:2014-01-01 00:00:00
abstract::Therapeutic drug monitoring (TDM) is a valuable tool for tailoring the dosage of the prescribed medication(s) to the individual pharmacokinetic characteristics of a patient. In psychiatry and neurology, however, proven evidence that TDM should be used for treatment with the multiple neuropsychiatric medications is res...
journal_title:Current drug delivery
pub_type: 杂志文章
doi:10.2174/1567201812666151029100909
更新日期:2016-01-01 00:00:00