AAPS PharmSciTech

, 20:85 | Cite as

Novel Inhalable Ciprofloxacin Dry Powders for Bronchiectasis Therapy: Mannitol–Silk Fibroin Binary Microparticles with High-Payload and Improved Aerosolized Properties

  • Chunxia Liu
  • Ling Lin
  • Zhengwei Huang
  • Qiaoli Wu
  • Junhuang Jiang
  • Li Lv
  • Xiaoxia Yu
  • Guilan QuanEmail author
  • Guocheng LiEmail author
  • Chuanbin Wu
Research Article


Non-cystic fibrosis bronchiectasis (NCFB) is a chronic respiratory disease associated with the high morbidity and mortality. Long-term intermittent therapy by inhalable antibiotics has recently emerged as an effective approach for NCFB treatment. However, the effective delivery of antibiotics to the lung requires administering a high dose to the site of infection. Herein, we investigated the novel inhalable silk-based microparticles as a promising approach to deliver high-payload ciprofloxacin (CIP) for NCFB therapy. Silk fibroin (SF) was applied to improve drug-payload and deposit efficiency of the dry powder particles. Mannitol was added as a mucokinetic agent. The dry powder inhaler (DPI) formulations of CIP microparticles were evaluated in vitro in terms of the aerodynamic performance, particle size distribution, drug loading, morphology, and their solid state. The optimal formulation (highest drug loading, 80%) exhibited superior aerosolization performance in terms of fine particle fraction (45.04 ± 0.84%), emitted dose (98.10 ± 1.27%), mass median aerodynamic diameter (3.75 ± 0.03 μm), and geometric standard deviation (1.66 ± 0.10). The improved drug loading was due to the electrostatic interactions between the SF and CIP by adsorption, and the superior aerosolization efficiency would be largely attributed to the fluffy and porous cotton-like property and low-density structure of SF. The presented results indicated the novel inhalable silk-based DPI microparticles of CIP could provide a promising strategy for the treatment of NCFB.


dry powder inhaler silk fibroin bronchiectasis antibiotic ciprofloxacin 


Funding information

This work was supported by National Natural Science Foundation of China (Grant No. 81503001), Guangdong Natural Science Foundation (Grant No. 2016A030313330), Guangdong Province Science and Technology Plan Project Public Welfare Fund and Ability Construction Project (Grant No. 2017A020215081, Grant No. 2016A020215069, Grant No. 2016A020215063), the Science and Technology Foundation of Guangzhou (Grant No.201707010103), and Yixian Scientific Research Project Set Sail (Grant No. YXQH201706).

Supplementary material

12249_2019_1291_MOESM1_ESM.docx (16 kb)
ESM 1 (DOCX 15 kb)


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Copyright information

© American Association of Pharmaceutical Scientists 2019

Authors and Affiliations

  • Chunxia Liu
    • 1
    • 2
  • Ling Lin
    • 3
  • Zhengwei Huang
    • 3
  • Qiaoli Wu
    • 2
  • Junhuang Jiang
    • 4
  • Li Lv
    • 1
  • Xiaoxia Yu
    • 1
  • Guilan Quan
    • 3
    Email author
  • Guocheng Li
    • 1
    • 2
    Email author
  • Chuanbin Wu
    • 3
  1. 1.Department of PharmacySun Yat-Sen Memorial Hospital, Sun Yat-sen UniversityGuangzhouPeople’s Republic of China
  2. 2.Department of PharmacyZengcheng District People’s Hospital of GuangzhouGuangzhouPeople’s Republic of China
  3. 3.School of Pharmaceutical SciencesSun Yat-Sen UniversityGuangzhouPeople’s Republic of China
  4. 4.College of PharmacyShenyang Pharmaceutical UniversityBenxiPeople’s Republic of China

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