Abstract:
This invention relates to a process for isolation and/or purification of a protein of interest and to the use of IMAC as a capture and the main separation step. In one embodiment, the invention relates to a process for the isolation and/or purification of a protein of interest by use of immobilized metal affinity chromatography (IMAC), comprising the steps of (a) applying a mixture or solution comprising said protein to an IMAC matrix, (b) separating contaminant(s) by use of metal ion affinity of said protein to said IMAC matrix, under conditions suitable to keep said protein bound to the matrix, (c) separating the protein of interest from further contaminant(s) by use of both a non-metal ion affinity interaction and a metal ion affinity interaction between said protein and said IMAC matrix.
Abstract:
The present invention belongs to the field of pharmaceutical industry and relates to novel monoclonal antibodies and fragments thereof which are bound to the available surface of a human recombinant TNF- alpha , TNF- alpha analogues and TNF- alpha soluble receptors p55 and p75. Further, the invention relates to stable hybridoma cell lines, which lines are capable of producing such monoclonal antibodies, to a process for the preparation thereof and to pharmaceutical preparations containing them. The invention also relates to a method for the quantitative determination of human TNF- alpha , free or complexed with soluble TNF- alpha receptors p55 and p75, and to a kit used therefor. By hitherto disclosed monoclonal antibodies and reagents developed therefrom, it has not been possible to simultaneously determine free TNF- alpha and its soluble receptors p55 and p75 as well as complexes thereof. Another object of the invention is also the TNF- alpha analogue TNF- alpha Cys95His107His108Cys148, which in a complex with TNF- alpha soluble receptors, is used as an antigen for immunization of mice.
Abstract:
The present invention relates to a new process for the production of a polypeptide of interest, or of a precursor thereof, wherein the protein or the precursor are expressed in a host cell comprising a cell wall and at least one cell membrane, followed by extraction from the intact host cell by partial permeabilization of the cell membrane under non-denaturing conditions. During extraction the polypeptide of interest, or the precursor thereof, which is expressed in at least partially correctly folded form, passes through the cell wall and the cell membrane.
Abstract:
The invention relates to the process for the isolation and / or purification of biologically active proteins, preferably TNF-alpha or TNF-alpha analogues. The process of the present invention results in the production of high yields of proteins, preferably TNF-alpha or TNFalpha analogues with a purity of greater than 98%. The described process is particularly suitable for the industrial production of proteins, preferably TNF-alpha or TNF-alpha analogues.
Abstract:
The invention relates to the synthetic gene coding for hG-CSF which enables expression in E. coli with an improved expression level of the recombinant hG-CSF regarding the total cellular proteins after expression
Abstract:
The invention relates to the process for the isolation of biologically active granulocyte colony stimulating factor (G-CSF), which enables the separation of correctly folded biologically active monomeric molecules of G-CSF from the incorrectly folded, biologically inactive monomeric, oligo- or polymeric and also from aggregated molecules of G-CSF by using immobilised metal affinity chromatography. The process of the invention, if desired the whole process, can be advantageously performed under native conditions. The biologically active G-CSF with a purity of greater than 95% is thus obtained. Only two additional chromatographic steps, cationic exchange chromatography and gel filtration, are then preferably applied to remove the traces of impurities. The entire process results in the production of higher yields of G-CSF with a purity of greater than 99%. The described process is particularly suitable for the industrial production of G-CSF.
Abstract:
The invention relates to a modifying agent comprising a water soluble polymer, wherein the water soluble polymer comprises at least one reactive selenium group, said reactive selenium group being capable of reacting with a thiol group thereby forming an -Se-S- bond. Furthermore, the invention relates to a method for producing said modifying agents and their use in the modification of pharmaceutically active agents, e.g. G-CSF. Additionally, the invention concerns conjugates comprising a water-soluble polymer and a pharmaceutically active agent, wherein the water-soluble polymer is linked via a S-Se-bond to agent and a method for their production and their use as medicaments. Finally, the invention concerns a pharmaceutical composition comprising the inventive conjugates.