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M94A0123.TXT
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1994-10-01
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Document 0123
DOCN M94A0123
TI Epithelial cell permeability of a series of peptidic HIV protease
inhibitors: aminoterminal substituent effects.
DT 9412
AU Conradi RA; Hilgers AR; Burton PS; Hester JB; Drug Delivery Systems
Research, Upjohn Laboratories, Upjohn; Company, Kalamazoo, MI 49001.
SO J Drug Target. 1994;2(2):167-71. Unique Identifier : AIDSLINE
MED/94348832
AB The influence of the aminoterminal substituent in a homologous series of
tetrapeptide analogs on transport across Caco-2 cell monolayers was
studied. In a series of pyridylcarboxamide regioisomers, the 2-pyridyl
isomer was significantly more permeable than either the 3- or
4-congeners. The uniqueness of this peptide was further suggested by
examining the partitioning behavior between heptane and ethylene glycol,
a system which has been developed as a simple estimate of the
desolvation energy or hydrogen bonding potential of a peptide. In this
model, the 2-isomer has a much larger partition coefficient than either
the 3- or 4-analogs, consistent with its being less solvated than
expected based on simple structural considerations. Factors possibly
contributing to this decreased effective polarity could be steric
interactions or intramolecular hydrogen bonding.
DE Amino Acid Sequence Cell Membrane Permeability/*PHYSIOLOGY
Epithelium/CYTOLOGY/METABOLISM Human Hydrogen Bonding HIV Protease
Inhibitors/CHEMISTRY/*PHARMACOKINETICS Isomerism Molecular Sequence
Data Peptides/CHEMISTRY/PHARMACOKINETICS Tumor Cells, Cultured
JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).