摘要:
The present invention belongs to the field of biotechnology, specifically to the field of recombinant protein expression. The present invention focuses on two problems commonly encountered during recombinant protein expression, low quantity of protein expression and genetic instability of cell lines used for recombinant protein expression. The basic principle of the present invention is to introduce several expression cassettes into a cell which expression cassettes all code for the same mature recombinant protein of interest, but which expression cassettes have different nucleotide sequences. Expression cassette means a polynucleotide sequence which comprises at least a promoter sequence, a start codon, a polynucleotide sequence coding for a protein which is intended to be recombinant expressed (POI), a stop codon and a terminator.
摘要:
Bone tissue materials comprising insulin-mimetic agents, such as suitable zinc, vanadium, tungsten, molybdenum, niobium, selenium, and manganese compounds, for facilitating spinal fusion of vertebrae in spinal fusion surgical procedures, and methods thereof. Additionally provided is a bone tissue kit for facilitating fusion of vertebrae in a spinal fusion surgical procedure including a composition formulated for facile application in a spinal fusion procedure comprising an insulin-mimetic agent and a pharmaceutically acceptable carrier. Yet further provided is an implantable device for enhancing spinal fusion including a prosthetic implant configured to stabilize and promote the fusion of two adjacent vertebrae, wherein the bone tissue contacting surfaces of the prosthetic implant are coated with a composition comprising an insulin-mimetic agent.
摘要:
Disclosed are a cell-targeted nano-material and biomedical uses thereof. The magnetic nano-material can bind with specificity to iron protein receptors having high expression on the surface of tissue cells, and can enter the cells. The present material can bind with specificity to a broad spectrum of tissue cells having a high expression of iron protein receptors, and can enable highly efficient cell targeting in animal models. The material can be used as a magnetic resonance imaging contrast and a fluorescent molecular probe for disease diagnosis, as well as a vector of medicine for disease treatment.
摘要:
An insulin analogue comprises a B-chain polypeptide incorporating a chlorinated phenylalanine. The chlorinated phenylalanine may be located at position B24. The chlorinated phenylalanine may be para-monochloro-phenylalanine. The analogue may be of a mammalian insulin, such as human insulin. A nucleic acid encodes such an insulin analogue. The chlorinated insulin analogues retain significant activity. A method of treating a patient comprises administering a physiologically effective amount of the insulin analogue or a physiologically acceptable salt thereof to a patient. Chlorine substitution-based stabilization of insulin may reduce fibrillation and thereby enhance the treatment of diabetes mellitus in regions of the developing world lacking refrigeration.
摘要:
A plastid transformation and expression vector which comprises an expression cassette comprising as operably linked components, in the 5' to the 3' direction of translation, a promoter operative in said plastid, a selectable marker sequence, a heterologous DNA sequence coding for cholera toxin B-subunit fused to proinsulin, a transcription termination region functional in said plastid, and flanking, each side of the expression cassette, flanking DNA sequences which are homologous to a DNA sequence inclusive of a spacer sequence of the target plastid genome, and, whereby stable integration of the heterologous coding sequence into the plastid genome of the target plant is facilitated throughout homologous recombination of the flanking sequence with the homologous sequences in the target plastid genome.
摘要:
A method is provided which allows high yields of acylated insulin. The method comprises expressing a singe-chain insulin precursor, preferably in yeast, cleaving the single-chain insulin precursor with a suitable protease which will open the peptide bond between the C-terminal amino group in the B-chain and a connecting peptide connecting the B chain with the A-chain, acylating the two-chain insulin intermediate in the e-amino group in LysB29 and subjecting the acylated two-chain insulin intermediate to a proteolytic enzyme which will cleave of the N-terminal extension on the B- and A-chains on the precursor molecule.
摘要:
The invention relates to advantageous processes for preparing heterologous proteins in prokaryotic host cells by improved codon use and/or expression of tRNAs which code for codons occurring rarely in said host cell.
摘要:
Described is the production of mammalian cells expressing prohormone convertase which facilitates the processing of prohormone precursors to active hormones. Also described are variant prohormone convertases, and prohormones. The transformed cells of the present invention may be used in the synthesis of properly processed polypeptide hormones, and in cell culture to reduce dependence upon added hormones and required serum polypeptide factors.