摘要:
The invention relates to a method for producing a transformed eukaryotic host cell which expresses a recombinant polypeptide of interest which method comprises introducing into a eukaryotic host cell: (a) a first polynucleotide vector which comprises (i) a first nucleotide sequence which encodes a recombinant polypeptide of interest, and (ii) a second nucleotide sequence encoding a selectable marker, which second nucleotide sequence is amplified when the host cell is contacted with a selection agent; and (b) a second polynucleotide vector having essentially the same nucleotide sequence as the first polynucleotide vector except that the second nucleotide sequence is replaced with a third nucleotide sequence which encodes a different selectable marker; the first polynucleotide vector and second polynucleotide vector being stably integrated into the genome of the host cell.
摘要:
The invention relates to Ab2-type anti-idiotypic antibodies and fragments thereof which mimic HVI-1 epitopes that are otherwise cryptic to the immune system and which antibodies or fragments thereof are directed against potently neutralizing anti-HIV-1 antibodies. The invention further relates to a hybridoma cell line 3H6 expressing the anti-idiotypic antibody and to pharmaceutical compositions containing the antibody or fragment thereof. The invention also relates to HIV-1 neutralizing Ab3-type antibodies elicited upon administration of the Ab2-type anti-idiotypic antibody or fragment thereof and to pharmaceutical compositions containing them. The invention also relates to the use of the present antibodies or fragments thereof as screening tools or as diagnostic or therapeutic agents.
摘要:
The invention provides a method for producing a recombinant polypeptide of interest which method comprises: (a) providing a host cell which comprises a nucleotide sequence which encodes the recombinant polypeptide of interest and which directs expression of the recombinant polypeptide of interest in the host cell; (b) providing a serum-free culture medium which comprises (i) water, a plant-derived peptone, an osmolality regulator, a buffer, an energy source, at least one amino acid, a lipid source or precursor, a source of iron, non-ferrous metal ions and optionally one or more vitamins and cofactors; and (ii) does not contain any full-length polypeptides; and (c) culturing the host cell in the culture medium under conditions that allow for expression of the recombinant polypeptide of interest.
摘要:
The invention relates to Ab2-type anti-idiotypic antibodies and fragments thereof which mimic HVI-1 epitopes that are otherwise cryptic to the immune system and which antibodies or fragments thereof are directed against potently neutralizing anti-HIV-1 antibodies. The invention further relates to a hybridoma cell line 3H6 expressing the anti-idiotypic antibody and to pharmaceutical compositions containing the antibody or fragment thereof. The invention also relates to HIV-1 neutralizing Ab3-type antibodies elicited upon administration of the Ab2-type anti-idiotypic antibody or fragment thereof and to pharmaceutical compositions containing them. The invention also relates to the use of the present antibodies or fragments thereof as screening tools or as diagnostic or therapeutic agents.
摘要:
The present invention relates to liposomes for drug delivery, wherein a liposome includes molecules of at least one desired drug distributed within an aqueous phase in the interior of the liposome and wherein the liposome further includes molecules of the same or of another drug attached to either or both sides of the liposomal membrane. More specifically, the invention relates to liposomes, wherein at least a part of the molecules of a desired drug bear a functional group that is reactive with a functional group present in at least one lipid fraction, and wherein the drug is covalently linked to the membrane lipids by chemical bonding, e.g. by ester bonding of a hydroxyl group of a lipid molecule and an acidic residue of the drug. In a preferred embodiment, the desired drug is a glycoprotein such as erythropoietin. The invention further relates to a method of manufacture of said liposomes and to pharmaceutical compositions containing them.
摘要:
The present invention relates to neutralizing anti-HIV-1 antibodies, particularly to mAb 4E10-IgG1, which has an HIV-1 neutralizing potency comparable to the one of mAb 2F5 and 2G12. 4E10-IgG1 binds to a novel conserved epitope (NWFDIT) C-terminal of the ELDKWA epitope recognized by 2F5.1 appears that both epitopes are cryptic epitopes within a region that may be accessible in a virus-cell fusion intermediate state only. 4E10-IgG1 potently neutralizes tissue culture adapted strains but also primary isolates of different clades, including A, B, C, D, and E, inclusing viruses that were found to be resistant to 2F5. None of the tested isolates was resistant to both anti-gp41-antibodies. The invention therefore also relates to peptides containing the 4E10 epitope and to compositions made thereof, as well as to anti-idiotypic antibodies that are reactive with the paratope of 4E10-IgG1, to compositions containing an antiidiotypic antibody optionally in combination with a peptide containing the 4E10 epitope, and to anti-HIV-1 compositions comprising 4E10-IgG1, optionally in combination with another neutralizing antibody such as 2F5 and/or 2G12.