摘要:
Novel polypeptides having functional domains of interest are described, along with DNA sequences that encode the same. A method of identifying these polypeptides by means of a sequence-independent (that is, independent of the primary sequence of the polypeptide sought), recognition unit-based functional screen is also disclosed. Various applications of the method and of the polypeptides identified are described, including their use in assay kits for drug discovery, modification, and refinement.
摘要:
Peptides having general and specific binding affinities for the Src homology region 3 (SH3) domains of proteins are disclosed in the present invention. In particular, SH3 binding peptides have been isolated from phage-displayed random peptide libraries which had been screened for isolates that bind to bacterial fusion proteins comprising SH3 and glutathione S-transferase (GST). Preferred peptides are disclosed which comprise a core 7-mer sequence (preferably, a consensus motif) and two or more, preferably at least six, additional amino acid residues flanking the core sequence, for a total length of 9, preferably at least 13, amino acid residues and no more than about 45 amino acid residues. Such peptides manifest preferential binding affinities for certain SH3 domains. The preferred peptides exhibit specific binding affinities for the Src-family of proteins. In vitro and in vivo results are presented which demonstrate the biochemical activity of such peptides.
摘要:
The present invention relates generally to synthetic gene sequences ('syngenes') that are identified by screening random peptide librairies for peptides that bind a ligand of choice. The synthetic gene sequences, together with, optionally, other DNA sequences that target the synthetic gene sequences or their encoded proteins to particular locations in vivo or intracellularly, or that contain processing signals, or that code for other peptides or amino acid sequences, are cloned into suitable expression vectors. The syngenes are used, for example, in gene therapy to supply, via expression of their encoded proteins, a therapeutic product. In another aspect, the invention relates to protein or peptide products of syngenes and their therapeutic and diagnsotic uses.
摘要:
A process for the purification of aminophosphonic acids under non-alkaline conditions is described. In particular, aminophosphonic acids are slurred in neutral or acidic water, heated to reflux, cooled and then filtered. Product purities approaching 100 % are thus obtained.
摘要:
Le nouveau procédé décrit sert à préparer des compositions de fragments d'anticorps solubles ayant des caractéristiques de ciblage supérieures lorsqu'elles sont administrées in vivo. Ces compositions de fragments d'anticorps se caractérisent sensiblement par la même immunospécificité que les anticorps non conjugués et par une solubilité aqueuse telle qu'elles sont appropriées pour une administration in vivo. Des procédés thérapeutiques et diagnostiques utilisant ces compositions de fragments d'anticorps sont également décrits.
摘要:
A peptide which permits or facilitates the transport of an active agent through a human or animal tissue. A predetermined amount of phage from a random phage library or a preselected phage library is administered in vivo or in s6itu to a site in an animal, such as into the gastro-intestinal tract. At a predetermined time, the phage which is transported across a tissue barrier is harvested at a harvesting site which is separated from the site of administration by the tissue barrier to select transported phage. This transported phage is amplified in a host. This cycle of events is repeated (using the transported phage produced in the most recent cycle) a predetermined number of times to obtain a selected phage library containing phage which can be transported from the site of administration to the harvesting site. The identity of at least one peptide coded by phage in the selected phage library is determined to identify a peptide which permits or facilitates the transport of an active agent through a human or animal tissue.
摘要:
Targeting agents that are capable of permitting or facilitating transport of an active agent through a human or animal gastro-intestinal tissue. These targeting agents are peptides or their derivatives (e.g., fragments) and peptidomimetics thereof, and the nucleotide sequences coding for the peptides and derivatives. The targeting agents 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. Therapeutic methods of administration, pharmaceutical compositions and formulations based on the targeting agent peptides are also provided. Preferably, the active agent is a drug or drug-containing nano- or microparticle.
摘要:
This invention relates to the preparation and use of novel open-chain or cyclic polypeptide constructs in which two or more polypeptide chains, in an open-chain construct, or one or more chains, in a cyclic construct, are chemically derivatized such that the resulting construct exhibits both metal-binding capability and tissue-, organ- or cell-targeting selectivity. In particular, the polypeptide constructs of the present invention comprise compounds of formula (I), in which, 'B' is a hydrocarbon backbone, 'P' is polypeptide capable of targeting particular cells, tissues or organs of the body, 'A' may be the group -NR' -NR' - or the group -NR' -NR' -L- in which L may be an aliphatic or aromatic linker group, R, R', and R' may be the same or different and may be hydrogen or an aliphatic group, m is an integer ≥ 2, provided that the groups R, R', R', L and 'P' of a given chain may be the same or different from the groups R, R', R', L and 'P' of another chain, n is an integer ≥ 0; or a pharmaceutically acceptable salt thereof. The constructs of the present invention are capable of binding a variety of metallic species.