Multivesicular liposomes for oral delivery of recombinant human epidermal growth factor

Arch Pharm Res. 2005 Aug;28(8):988-94. doi: 10.1007/BF02973888.

Abstract

The purpose of the present study was to prepare multivesicular liposomes with a high drug loading capacity and to investigate its potential applicability in the oral delivery of a peptide, human epidermal growth factor (rhEGF). The multivesicular liposomes containing rhEGF was prepared by a two-step water-in-oil-in-water double emulsification process. The loading efficiency was increased as rhEGF concentration increased from 1 to 5 mg/mL, reaching approximately 60 % at 5 mg/mL. Approximately 47% and 35% of rhEGF was released from the multivesicular liposomes within 6 h in simulated intra-gastric fluid (pH 1.2) and intra-intestinal fluid (pH 7.4), respectively. rhEGF-loaded multivesicular liposomes markedly suppressed the enzymatic degradation of the peptide in an incubation with the Caco-2 cell homogenate. However, the transport of rhEGF from the multivesicular liposomes to the basolateral side of Caco-2 cells was two times lower than that of the rhEGF in aqueous solution. The gastric ulcer healing effect of rhEGF-loaded multivesicular liposomes was significantly enhanced compared with that of rhEGF in aqueous solution; the healing effect of the liposomes was comparable to that of the cimetidine in rats. Collectively, these results indicate that rhEGF-loaded multivesicular liposomes may be used as a new strategy for the development of an oral delivery system in the treatment of peptic ulcer diseases.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Administration, Oral
  • Animals
  • Anti-Ulcer Agents / administration & dosage*
  • Anti-Ulcer Agents / pharmacokinetics*
  • Biological Availability
  • Caco-2 Cells
  • Disease Models, Animal
  • Drug Delivery Systems*
  • Drug Stability
  • Epidermal Growth Factor / administration & dosage*
  • Epidermal Growth Factor / genetics
  • Epidermal Growth Factor / pharmacokinetics*
  • Ethanol
  • Gastric Mucosa / metabolism
  • Humans
  • Hydrogen-Ion Concentration
  • Liposomes / chemical synthesis*
  • Male
  • Rats
  • Rats, Sprague-Dawley
  • Recombinant Proteins / pharmacokinetics
  • Stomach Ulcer / chemically induced
  • Stomach Ulcer / drug therapy
  • Time Factors

Substances

  • Anti-Ulcer Agents
  • Liposomes
  • Recombinant Proteins
  • Ethanol
  • Epidermal Growth Factor