Encapsulation and release of Doxycycline from electrospray-generated PLGA microspheres: effect of polymer end groups.

08:00 EDT 9th April 2019 | BioPortfolio

Summary of "Encapsulation and release of Doxycycline from electrospray-generated PLGA microspheres: effect of polymer end groups."

The aim of this study was to investigate the influence of end group of poly(lactic-co-glycolic acid) (PLGA) on the drug loading and release behavior of electrospray-generated PLGA microspheres. To this end, doxycycline hyclate (DOX) was selected as a model drug, and PLGA (molecular weight: 17 and 44 kDa) with either an acid or ester end group were electrosprayed with DOX. The processing parameters were optimized to obtain microspheres comparable in size. Drug loading efficiency and release profile were determined by the high-performance liquid chromatography-ultraviolet detection (HPLC-UV) method. PLGA polymers or drug-loaded microspheres were characterized before and after exposure to phosphate buffer saline at 37 °C regarding the wettability of polymers, pH changes of the buffer, molecular weight of PLGA and morphology of the microspheres. The acid end group of PLGA microspheres brought about lower encapsulation efficiency and faster DOX release rate in our study, indicating that different hydrophilicity of polymer and degradation speed were the main reasons causing a difference in encapsulation efficiency and release profile. In addition, DOX released from the PLGA microspheres was active by showing antibacterial effects against Porphyromonas gingivalis as measured using a zone of inhibition test, and varying the end groups showed no impact on the antibacterial efficacy. This study demonstrated that the end group of PLGA can be used as a new tool to regulate drug encapsulation efficiency and release rate to meet different clinical drug delivery requirements.


Journal Details

This article was published in the following journal.

Name: International journal of pharmaceutics
ISSN: 1873-3476


DeepDyve research library

PubMed Articles [7814 Associated PubMed Articles listed on BioPortfolio]

Highly bioactive, bevacizumab-loaded, sustained-release PLGA/PCADK microspheres for intravitreal therapy in ocular diseases.

Bevacizumab, a vascular endothelial growth factor (VEGF)-targeting drug, is widely used as an off-label therapeutic for age-related macular degeneration (AMD). To reduce the monthly administration fre...

Antimicrobial Activity of 3D-Printed Poly(ε-Caprolactone) (PCL) Composite Scaffolds Presenting Vancomycin-Loaded Polylactic Acid-Glycolic Acid (PLGA) Microspheres.

BACKGROUND The aim of this study was to design and test a novel composite scaffold with antibacterial efficacy for treating bone infections using a three-dimensional (3D) printed poly(ε-caprolactone)...

Liquid jet breakup: A new method for the preparation of poly lactic-co-glycolic acid microspheres.

The purpose of this study was to apply the phenomenon of liquid jet breakup to the preparation of sustained-release microspheres. The mechanisms of liquid jet breakup in different jet states were inve...

Facile fabrication of PEG-coated PLGA microspheres via SPG membrane emulsification for the treatment of scleroderma by ECM degrading enzymes.

We developed a facile fabrication method for preparing poly(ethylene glycol)(PEG)-coated poly (lactic-co-glycolic acid) (PLGA) microspheres with homogeneous size distribution via a combination of mPEG...

PLGA microsphere/PVA hydrogel coatings suppress the foreign body reaction for 6 months.

The application of dexamethasone releasing poly (lactic-co-glycolic acid) (PLGA) microspheres embedded in a poly vinyl alcohol (PVA) hydrogel coatings have been successfully used in the suppression of...

Clinical Trials [2520 Associated Clinical Trials listed on BioPortfolio]

Locally Delivered Doxycycline Adjunct to Nonsurgical Periodontal Therapy.

The aim of this clinical study is to asses the effect of ultrasonic periodontal debridement associated to locally delivered doxycycline (20%) by PLGA microspheres on chronic generalized pe...

Oracea Soolantra Association in Patients With Severe Rosacea

The main objective of this study is to evaluate the efficacy of Ivermectin 1% topical cream associated with Doxycycline 40 mg Modified release (MR) capsules versus Ivermectin 1% topical cr...

Treatment of Acne Vulgaris With Doryx Tablets Compared to Doxycyline Hyclate

Randomized, multi-center, open label, active-comparator study to compare the efficacy and tolerability of Doryx Delayed Release Tablets to doxycycline hyclate in patients with moderate to ...

A Prospective Study Comparing Contour SE™ Microspheres to Embosphere® Microspheres for Treating Symptomatic Uterine Fibroids With Uterine Fibroid Embolization (UFE)

The purpose of this study is to demonstrate comparability between Contour SE™ Microspheres and Embosphere® Microspheres for achieving post UFE fibroid devascularization in women with s...

Bioavailability Study of Doxycycline Monohydrate Capsules and Monodox Under Fasting and Fed Conditions

To compare the rate and extent of absorption of doxycycline monohydrate capsules equivalent to 100 mg doxycycline (Par) versus Monodox (Oclassen Pharmaceuticals)

Medical and Biotech [MESH] Definitions

Polymers of silicone that are formed by crosslinking and treatment with amorphous silica to increase strength. They have properties similar to vulcanized natural rubber, in that they stretch under tension, retract rapidly, and fully recover to their original dimensions upon release. They are used in the encapsulation of surgical membranes and implants.

A mass spectrometry technique used for analysis of nonvolatile compounds such as proteins and macromolecules. The technique involves preparing electrically charged droplets from analyte molecules dissolved in solvent. The electrically charged droplets enter a vacuum chamber where the solvent is evaporated. Evaporation of solvent reduces the droplet size, thereby increasing the coulombic repulsion within the droplet. As the charged droplets get smaller, the excess charge within them causes them to disintegrate and release analyte molecules. The volatilized analyte molecules are then analyzed by mass spectrometry.

Forms to which substances are incorporated to improve the delivery and the effectiveness of drugs. Drug carriers are used in drug-delivery systems such as the controlled-release technology to prolong in vivo drug actions, decrease drug metabolism, and reduce drug toxicity. Carriers are also used in designs to increase the effectiveness of drug delivery to the target sites of pharmacological actions. Liposomes, albumin microspheres, soluble synthetic polymers, DNA complexes, protein-drug conjugates, and carrier erythrocytes among others have been employed as biodegradable drug carriers.

A synthetic TETRACYCLINE derivative with similar antimicrobial activity. Animal studies suggest that it may cause less tooth staining than other tetracyclines. It is used in some areas for the treatment of chloroquine-resistant falciparum malaria (MALARIA, FALCIPARUM).

The shrinkage of the foreign body encapsulation scar tissue that forms around artificial implants imbedded in body tissues.

Quick Search


DeepDyve research library

Relevant Topics

Drug Discovery
Clinical Approvals Clinical Trials Drug Approvals Drug Delivery Drug Discovery Generics Drugs Prescription Drugs In the fields of medicine, biotechnology and pharmacology, drug discovery is the process by which drugs are dis...

Pharmacy is the science and technique of preparing as well as dispensing drugs and medicines. It is a health profession that links health sciences with chemical sciences and aims to ensure the safe and effective use of pharmaceutical drugs. The scope of...

Drug Delivery
<!--LGfEGNT2Lhm-->Drug delivery is the method or process of administering a pharmaceutical compound to achieve a therapeutic effect in humans or animals.  <!--LGfEGNT2Lhm-->Drug delivery technologies are <!--LGfEGNT2Lhm-->patent pr...

Searches Linking to this Article