Biodegradable Core/Shell Fibers by Coaxial Electrospinning: Processing, Fiber Characterization, and Its Application in Sustained Drug Release

A modified coaxial electrospinning process was developed for creating drug-loaded composite nanofibers. Using a mixed solvent of ethanol and N,N-dimethylacetamide as a sheath fluid, the electrospinning of a codissolving solution of diclofenac sodium (DS) and Eudragit L100 (EL100) could run smoothly and continuously without any clogging. A series of analyses were undertaken to characterize the resultant nanofibers from both the modified coaxial process and a one-fluid electrospinning in terms of their morphology, physical form of the components, and their functional performance. Compared with those from the one-fluid electrospinning, the DS-loaded EL100 fibers from the modified coaxial process were rounder and smoother and possessed higher quality in terms of diameter and distribution with the DS existing in the EL100 matrix in an amorphous state; they also provided a better colon-targeted sustained drug release profile with a longer release time period. The modified coaxial process not only can smooth the electrospinning process to prevent clogging of spinneret, but also is a useful tool to tailor the shape of electrospun nanofibers and thus endow them improved functions.

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Core-shell biopolymer microspheres for sustained drug release

Journal of Applied Polymer Science ◽

10.1002/app.41782 ◽

2014 ◽

Vol 132 (14) ◽

pp. n/a-n/a ◽

Cited By ~ 1

Author(s):

Liqing Tan ◽

Tao Jiang ◽

Xiaolan Yang ◽

Wei Li ◽

Lijun Pan ◽

...

Keyword(s):

Drug Release ◽

Core Shell ◽

Sustained Drug Release

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Core–shell structured gel-nanocarriers for sustained drug release and enhanced antitumor effect

International Journal of Pharmaceutics ◽

10.1016/j.ijpharm.2015.02.053 ◽

2015 ◽

Vol 484 (1-2) ◽

pp. 163-171 ◽

Cited By ~ 17

Author(s):

Wei He ◽

Yaqi Lv ◽

Yaping Zhao ◽

Chaoran Xu ◽

Zhu Jin ◽

...

Keyword(s):

Drug Release ◽

Antitumor Effect ◽

Core Shell ◽

Sustained Drug Release

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Sustained drug release and antibacterial activity of ampicillin incorporated poly(methyl methacrylate)–nylon6 core/shell nanofibers

Polymer ◽

10.1016/j.polymer.2013.03.046 ◽

2013 ◽

Vol 54 (11) ◽

pp. 2699-2705 ◽

Cited By ~ 62

Author(s):

A. Sohrabi ◽

P.M. Shaibani ◽

H. Etayash ◽

K. Kaur ◽

T. Thundat

Keyword(s):

Antibacterial Activity ◽

Drug Release ◽

Methyl Methacrylate ◽

Core Shell ◽

Sustained Drug Release ◽

Poly Methyl Methacrylate

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Synthesis, Characterization and in-vitro drug release studies of a macromolecular prodrug of Didanosine.

International Journal of Drug Delivery Technology ◽

10.25258/ijddt.v2i2.8845 ◽

2010 ◽

Vol 2 (2) ◽

Author(s):

Neeraj Agrawal ◽

M.J. Chandrasekar ◽

U.V. Sara ◽

Rohini A.

Keyword(s):

Drug Release ◽

Drug Level ◽

Drug Release Profile ◽

Sustained Drug Release ◽

In Vitro Drug Release ◽

Alkaline Environment ◽

Stomach Acid ◽

Release Studies ◽

Macromolecular Prodrug

A macromolecular prodrug of didanosine (ddI) for oral administration was synthesized and evaluated for in-vitro drug release profile. Didanosine was first coupled to 2-hydroxy ethyl methacrylate (HEMA) through a succinic spacer to form HEMA-Suc-ddI monomeric conjugate which was subsequently polymerized to yield Poly(HEMA-Suc-ddI) conjugate. The structures of the synthesized compounds were characterized by FT-IR, Mass and 1H-NMR spectroscopy. The prodrug was subjected for in-vitro drug release studies in buffers of pH 1.2 and 7.4 mimicking the upper and lower GIT. The results showed that the drug release from the polymeric backbone takes place in a sustained manner over a period of 24 h and the amount of drug released was comparatively higher at pH 7.4 indicating that the drug release takes place predominantly at the alkaline environment of the lower GIT rather than at the acidic environment of the upper GIT. This pH dependent sustained drug release behavior of the prodrug may be capable of reducing the dose limiting toxicities by maintaining the plasma drug level within the therapeutic range and increasing t1/2 of ddI. Moreover, the bioavailability of the drug should be improved as the prodrug releases ddI predominantly in the alkaline environment which will reduce the degradation of ddI in the stomach acid.

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Formulation and Evaluation of Chitosan-Polyaniline Nanocomposites for Controlled Release of Anticancer Drug Doxorubicin

International Journal of Drug Delivery Technology ◽

10.25258/ijddt.v8i2.13874 ◽

2018 ◽

Vol 8 (2) ◽

Author(s):

Dillip Kumar Behera ◽

Kampal Mishra ◽

Padmolochan Nayak

Keyword(s):

Tensile Strength ◽

Drug Release ◽

Nanocomposite Films ◽

Casting Method ◽

Sustained Drug Release ◽

In Vitro Drug Release ◽

Clay Particles ◽

Solution Casting Method ◽

Nanoclay Content

In this present work, chitosan (CS) crosslink with polyaniline (PANI) with montmorilonite (MMT) called as (CSPANI/MMT) and CS crosslink with PANI without MMT called as (CS-PANI) were prepared by employing the solution casting method. Further the formation of nanocomposites CS-PANI/MMT and CS-PANI were investigated using XRD, FTIR, SEM and tensile strength. Water uptake and swelling ratio of the CS-PANI and CS-PANI/MMT were found to decrease with increase in concentration of clay. Mechanical properties of the CS-PANI and CS-PANI/MMT were assessed in terms of tensile strength and extensibility using texture analyzer. Increase in tensile strength and reduction in extensibility was reported with increase in the nanoclay content. In vitro drug release study on CS-PANI and CS-PANI/MMT indicated pronounced sustained release of doxorubicin by the incorporation of clay particles in the CS polymer matrix. Overall CSPANI/MMT nanocomposite films exhibited improved mechanical and sustained drug release properties than CS-PANI.

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