Random peptides that bind to gastro-intestinal tract (GIT)...

Chemistry: natural resins or derivatives; peptides or proteins; – Peptides of 3 to 100 amino acid residues – 25 or more amino acid residues in defined sequence

Reexamination Certificate

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C514S021800, C424S185100

Reexamination Certificate

active

07053177

ABSTRACT:
This invention relates to proteins (e.g., peptides) that are capable of facilitating transport of an active agent through a human or animal gastrointestinal tissue, and derivatives (e.g., fragments) and analogs thereof, and nucleotide sequences coding for said proteins and derivatives. The proteins of the invention have use in facilitating transport of active agents from the lumenal side of the GIT into the systemic blood system, and/or in targeting active agents to the GIT. Thus, for example, by binding (covalently or noncovalently) a protein of the invention to an orally administered drug, the drug can be targeted to specific receptor sites or transport pathways which are known to operate in the human gastrointestinal tract, thus facilitating its absorption into the systemic system.

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