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Cellulose

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Fabrication and bioevaluation of a medicated electrospun mat based on azido-cellulose acetate via click chemistry

  • Ahmed A. NadaEmail author
  • Faten Hassan Hassan Abdellatif
  • Ahmed A. F. Soliman
  • Jialong Shen
  • Samuel M. Hudson
  • Nabil Y. Abou-Zeid
Original Research
  • 28 Downloads

Abstract

Cellulose acetate (CA) electrospun fibers have been used in different medical applications such as drug delivery systems to release various drugs. CA, usually available with a typical degree of substitution (DS) of 2.4–2.5, shows little control over the release rate of the incorporated substances, due to the lack of active functional groups. In this work, click chemistry was used to activate CA and produce crosslinked electrospun mats to provide sustained release for topical administration. CA was activated by introducing azide functional groups on the residual hydroxyl groups of the polymer chains with a DSAzido of 0.24 by a coupling reaction. Azido-CA was then electrospun to produce nanofibers, in which capsaicin and sodium diclofenac, as pain-relieving drugs were encapsulated. Propargylated maltose was synthesized as a crosslinker to the Azido-CA via triazole chemistry. Spectral analysis was used to confirm the chemical structure of the new derivatives and the click-matrices. SEM morphological analysis of the Azido-CA electrospun fibers showed a range of diameters from 140 to 270 nm, with clear, smooth surfaces. Samples of the matrices were assessed for cytotoxicity and showed an acceptable cell viability. In a rat model, sodium diclofenac and capsaicin-loaded electrospun mats of Azido-CA showed superior closure rates over the untreated rats and those treated with a commercial cream. Rats treated with electrospun mat of CA, Azido-CA loaded with drugs showed normal intact histological structure of the epidermis and dermis.

Keywords

Electrospun fiber Click-scaffold Azidation Controlled release Wound healing Topical applications 

Notes

Acknowledgments

Authors are grateful for the funding provided by the U.S.-Egypt Science and Technology Joint Fund, administered by the National Academy of Science. (US: CFDA # 98.00-AID, Subaward 2000007149). Authors are grateful to National Research Centre (Scopus affiliation ID: 60014618) for the provided facilities and analytical support and for the financial support from the Science and Technology Development Fund (STDF) through the US-Egypt Project, Cycle 17 and I.D. 114, entitled” A Medical Textile for Comprehensive Wound Care: A Laminated Multifunctional Electrospun Fabric that is Hemostatic, Anti-inflammatory and Anti-microbial”. All rats were handled in accordance with the NIH Guidelines for the Care and Use of Laboratory Animals and with the recommendations of the Institutional Ethical Committee (Reg. No. 17-055).

Compliance with ethical standards

Conflict of interest

Authors have declared no conflicts of interest.

Supplementary material

10570_2019_2739_MOESM1_ESM.docx (416 kb)
Supplementary material 1 (DOCX 416 kb)

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Copyright information

© Springer Nature B.V. 2019

Authors and Affiliations

  • Ahmed A. Nada
    • 1
    Email author
  • Faten Hassan Hassan Abdellatif
    • 1
  • Ahmed A. F. Soliman
    • 2
  • Jialong Shen
    • 3
  • Samuel M. Hudson
    • 3
  • Nabil Y. Abou-Zeid
    • 1
  1. 1.Textile Research Division, Pre-treatment and Finishing of Cellulosic Fabric DepartmentNational Research Centre (Scopus Affiliation ID 60014618)Dokki, GizaEgypt
  2. 2.Pharmaceutical and Drug Industries Division, Department of PharmacognosyNational Research CentreDokki, GizaEgypt
  3. 3.Department of Textile Engineering Chemistry and ScienceNorth Carolina State UniversityRaleighUSA

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