摘要:
The present invention is directed to a peptide or polypeptide comprising an Fv molecule, a construct thereof, a fragment of either, or a construct of a fragment having enhanced binding characteristics so as to bind selectively and/or specifically to a target cell in favor of other cells, wherein the binding selectivity or specificity is primarily determined by a first hypervariable region, and wherein the Fv is a scFv or a dsFv, and optionally having one or more tags. The enhanced binding is directed to a substantially exposed and/or over-expressed binding site on or in a target comprising a cell in favor of other cells on or in which the binding site is not substantially available and/or expressed. The invention is further directed to a method for isolating such peptides and polypeptides from a phage display library and to the nucleic acid molecules encoding them. The invention provides for a pharmaceutical composition comprising the peptide or polypeptide and kits for diagnosis and treatment of disease, specifically cancer, most specifically acute myeloid leukemia.
摘要:
The present invention provides a recombinant polypeptide having the amino acid sequence X-tyr - gly where tyr - gly is identical to the sequence shown in Figure 10, and wherein X is methionine or absent and wherein asn may be substituted by pro. The invention further provides a method of producing the polypeptide which comprises transforming a host cell with an expression plasmid encoding the polypeptide, culturing the transformed host cell so that the cell produces the polypeptide encoded by the plasmid, and a method of recovering the polypeptide so produced.
摘要:
The present invention relates to tumor associated antigen (TAA) peptides and to the use of same, of polynucleotides encoding same and of cells presenting same as anti-tumor vaccines. More particularly, the present invention relates to tumor associated antigen peptides derived from Uroplakin Ia, Ib, II and III, Prostate specific antigen (PSA), Prostate acid phosphatase (PAP) and Prostate specific membrane antigen (PSMA), BA-46 (Lactadherin), Mucin (MUC-1), and Teratocarcinoma-derived growth factor (CRIPTO-1) and the use of same as anti-tumor vaccines to prevent or cure bladder, prostate, breast or other cancers, carcinomas in particular. Most particularly, the present invention relates to tumor associated antigen peptides which are presentable to the immune system by HLA-A2 molecules.
摘要:
This invention provides an imaging agent which comprises a polypeptide labeled with an imageable marker, such polypeptide having an amino acid sequence substantially present in the fibrin binding domain of naturally-occuring human fibronectin and being capable of binding to fibrin. The invention further provides a method wherein the imaging agent is used for imaging a fibrin-containing substance, i.e., a thrombus or atherosclerotic plaque. Further provided are plasmids for expression of polypeptides having an amino acid sequence substantially present in the fibrin binding domain of naturally-occuring human fibronectin and being capable of binding to fibrin, hosts containing these plasmids, methods of producing the polypeptides, methods of treatment using the polypeptides, and methods of recovering, refolding and reoxidizing the polypeptides. The invention also provides for purified polypeptides substantially free of other substances of human origin which have an amino acid sequence substantially present in the fibrin binding domain of naturally-occuring human fibronectin and which are capable of binding to fibrin.
摘要:
Processes are provided for producing purified, hepatitis B surface antigen particles in mammalian cells which comprise culturing mammalian cells which produce the particles in a culture medium supplemented with a serum free of high molecular weight contaminant proteins and recovering the purified, hepatitis B surface antigen particles. Removal of molecules having a molecular weight greater than about 3 x 105 daltons by prefractionation, for example, allows cells to be grown in culture media containing high levels of fetal calf serum, removes high molecular weight contaminant proteins which may be inhibitory to cell growth and simplifies purification of HBsAg since high molecular weight contaminant proteins are the major contaminants removed by purification processes.
摘要:
Acétylcholinestérase humaine de recombinaison, non glycosylée, active sur le plan enzymatique, renfermant au moins un polypeptide caractérisé par une séquence d'acides aminés essentiellement identiques à la séquence d'acides aminés de l'acétylcholinestérase humaine ne se produisant pas naturellement. L'invention porte en outre sur une acétylcholinestérase humaine monomère recombinée, active sur le plan enzymatique, renfermant un polypeptide caractérisé par une séquence d'acides aminés dans laquelle la sérine est remplacée par cis 611 dans la séquence d'acétylcholinestérase humaine non naturelle (position 580 dans le polypeptide mature) et sur une acétylcholinestérase humaine de recombinaison, active sur le plan enzymatique, renfermant au moins un polypeptide caractérisé par la présence d'une méthionine de l'extrémité terminale N de la séquence d'acides aminés de l'acétylcholinestérase humaine naturelle. L'invention porte également sur des méthodes thérapeutiques et diagnostiques mettant en oeuvre cette acétylcholinestérase de recombinaison active sur le plan enzymatique.
摘要:
Un procédé permet de récupérer une solution contenant de la dismutase purifiée enzymatiquement active de superoxyde de Cu-Zn ou un analogue polypeptidique de celle-ci ayant essentiellement la même séquence d'acides aminés et la même activité biologique de la dismutase de superoxyde de Cu-Zn naturelle, à partir d'une composition qui comprend des cellules contenant de la dismutase de superoxyde de Cu-Zn ou un analogue polypeptidique de celle-ci. Ce procédé permet en outre d'augmenter le rendement d'extraction des solutions ayant une concentration accrue de l'isoforme b d'un analogue polypeptidique enzymatiquement actif de la dismutase de superoxyde de Cu-Zn à partir d'une composition qui comprend des cellules contenant des isoformes a, b et c de l'analogue polypeptidique.