PBA-ω-Lys as sustained phenylbutyrate-releasing prodrug

Chun Li Wang, Po Ren Hsueh, Meng Jie Sun, Yann Lii Leu, Feng Shou Chang, Shu Wei Yang, Jang Feng Lian, Hui Po Wang

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Lysine was attached to phenylbutyric acid (PBA) to form PBA-α-Lys and PBA-ω-Lys as PBA prodrugs for treating chemotherapy-associated mucositis. Pharmacokinetic studies were conducted in Wistar rats for determining the systemic bioavailability of both prodrugs and the released PBA. The systemic bioavailability of PBA after oral administration of PBA-α-Lys or PBA-ω-Lys was higher than from i.v. administration, indicating that first pass effect is responsible for the transformation from the prodrugs to the parent drug. Lack of stability in the intestine made PBA-α-Lys unsatisfied as an oral prodrug of PBA. Oral administration of PBA-ω-Lys, on the other hand, led to a slow PBA-releasing profile in circulation. Although the AUC 0→t of systemic released PBA from oral administration of PBA-ω-Lys was lower than from oral administration of PBA per se, MRT inf was 5 times longer (9.64 ± 2.16 vs 1.81 ± 0.28 hr), t1/2 was 4 times longer (6.18 ± 2.09 hr vs 1.50 ± 0.17 hr), and AUMCinf was 2 folds higher (168.7 ± 67.7 hr*h*μg/mL vs 88.8 ± 12.4 hr*h*μg/mL). In conclusion, oral administration of PBA-ω-Lysine exhibited a sustained PBA-releasing pharmacokinetic profile in rats. The bioavailability of PBA released in inflammatory tissues and anti-mucositis activity need to be further investigated for the evaluation of PBA-ω-Lysine as an effective targetable anti-mucositis agent.

Original languageEnglish
Pages (from-to)371-379
Number of pages9
JournalJournal of Food and Drug Analysis
Issue number6
Publication statusPublished - Dec 2010


  • PBA-α-Lys
  • PBA-ω-Lys
  • Pharmacokinetics
  • Phenylbutyric acid

ASJC Scopus subject areas

  • Food Science
  • Pharmacology


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