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Fragmented particles containing octreotide acetate prepared by spray drying technique for dry powder inhalation

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Abstract

Dry powder inhalers (DPIs) have been proposed as an alternative administration route for protein and peptide drugs. However, DPI particles are easy to aggregate due to the strong interactions between the particles, leading to poor aerosolization performance. In this study, fragmented particles containing octreotide acetate (OA) were prepared by spray drying technique for dry powder inhalation, which were expected to decrease the particle-particle interaction by reducing the contact sites. Mannitol and ammonium carbonate were used as protein stabilizer and fragment-forming agent, respectively. The obtained fragmented particles presented larger particle size, lower density, better dispersibility, and well in vitro aerodynamic behavior (emitted dose > 97%, fine particle fraction ≈ 40%). The circular dichroism spectrum results indicated that OA maintained the stability throughout the spray drying process. The relative bioavailability of dry powder inhalation (DPI) compared with subcutaneous injection of commercial product was up to 88.0%, demonstrating the feasibility of DPI for OA delivery. These results confirmed that the proposed fragmented particles had great potential for pulmonary delivery of protein and peptide drugs in a painless, rapid, and convenient manner.

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Funding

This study received financial support from the National Science Foundation of China (Grant No. 81673375), the Science and Technology Plan Projects of Guangdong Province (Grant No. 2015B020232010), and Basic Scientific Research Business Expense of the University for the Young Teacher Cultivation Project of Sun Yat-sen University (Grant No. 16ykpy23).

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Authors and Affiliations

  1. School of Pharmaceutical Sciences, Sun Yat-sen University, 132 East Circle at University Town, Guangzhou, 510006, China

    Ailin Hou, Lu Li, Ying Huang, Vikramjeet Singh, Xin Pan, Guilan Quan & Chuanbin Wu

  2. Institute for Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou, China

    Chune Zhu

Authors
  1. Ailin Hou
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  2. Lu Li
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  3. Ying Huang
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  4. Vikramjeet Singh
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  5. Chune Zhu
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  6. Xin Pan
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  7. Guilan Quan
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  8. Chuanbin Wu
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Corresponding author

Correspondence to Guilan Quan.

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The authors declare that there are no conflicts of interest.

Ethical approval

All the animal experiments were approved by the Ethical Committee of Sun Yat-sen University and performed in accordance with the guidelines of the Ethics of the World Medical Association.

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Hou, A., Li, L., Huang, Y. et al. Fragmented particles containing octreotide acetate prepared by spray drying technique for dry powder inhalation. Drug Deliv. and Transl. Res. 8, 693–701 (2018). https://doi.org/10.1007/s13346-018-0515-7

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  • DOI: https://doi.org/10.1007/s13346-018-0515-7

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