Application and drying of protein drug microdroplets on solid surfaces

Pharm Dev Technol. 2007;12(1):61-70. doi: 10.1080/10837450601166619.

Abstract

A new method to apply small amounts of protein drug solutions in the form of microdroplets to surfaces and to dry them is presented. A robotic dispensing system was used to divide concentrated aqueous protein solutions into microdroplets 20-mL and to place them onto various solid surfaces in a predetermined manner. Afterward, vacuum drying was applied to reduce the residual moisture of the protein/excipient matrix. Optionally, spray coating of the dry microdroplet patterns was carried out to achieve controlled release. Process parameters were studied and optimized for residual moisture, protein stability, and long-term storage stability.

MeSH terms

  • Administration, Cutaneous
  • Chemistry, Pharmaceutical
  • Desiccation
  • Drug Carriers
  • Drug Delivery Systems
  • Drug Stability
  • Drug Storage
  • Electrochemistry
  • Erythropoietin / administration & dosage
  • Erythropoietin / chemistry
  • Excipients
  • Freeze Drying
  • Nanoparticles
  • Proteins / administration & dosage
  • Proteins / chemistry*
  • Recombinant Proteins
  • Robotics
  • Surface Properties

Substances

  • Drug Carriers
  • Excipients
  • Proteins
  • Recombinant Proteins
  • Erythropoietin