Pharmacokinetics properties of surface-modified vesicles

Keitaro Sou*, Beth Coins, William T. Phillips, Shinji Takeoka, Eishun Tsuchida

*Corresponding author for this work

Research output: Contribution to conferencePaperpeer-review


Phospholipid vesicles, also called liposome, are potent carriers of various drugs and offer a drug targeting system into specific organs, tissues, or cells, to minimize the drug administration dose and improve the therapeutic safety. Recently, we have found that phospholipid vesicle containing an anionic amphiphile; 1,5-dihexadecyl-L-glutamate-N-succinic acid (Suc-2C 16) and polyethylene glycol)-lipid (PEG-DSPE) are mainly up taken by rabbit bone marrow at a small injection dose (15 mg/kg b.w.). At 24 h after intravenous injection of 99m-technetimu ( 99mTc)-labeled vesicles in rabbit, biodistribution data clearly indicated that the component of Suc-2C 16 induced the significant affinity to bone marrow in comparison with control vesicles, which do not have Suc-2C 16. Further incorporation of as little as 0.6 mol% of PEG-DSPE passively enhanced the distribution of Suc-Ve into bone marrow inhibiting the liver uptake, and this formulation was distributed in the bone marrow over the whole body, reaching to 70% of the injected dose by 6 h after injection.

Original languageEnglish
Number of pages2
Publication statusPublished - 2005 Dec 1
Event54th SPSJ Symposium on Macromolecules - Yamagata, Japan
Duration: 2005 Sept 202005 Sept 22


Other54th SPSJ Symposium on Macromolecules


  • Bone marrow
  • Carrier
  • Pharmacokinetics
  • Phospholipid vesicles
  • Poly (ethylene glycol)
  • Surface modification

ASJC Scopus subject areas

  • Engineering(all)


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