摘要:
PROBLEM TO BE SOLVED: To provide a method for rendering cells hypermutable, and hypermutable cell lines altered genetically and phenotypically.SOLUTION: The invention relates to use of dominant negative alleles of human mismatch repair genes to generate hypermutable cells and organisms; the use of introducing genes into cells and transgenic animals by which new cell lines and animal varieties with new and useful properties can be prepared more efficiently than by relying on the natural rate of mutation; and use of mutagens for enhancing a rate of further augmented mutation.
摘要:
PROBLEM TO BE SOLVED: To provide a method for rendering cells hypermutable, and hypermutable cell lines altered genetically and phenotypically.SOLUTION: The invention relates to use of dominant negative alleles of human mismatch repair genes to generate hypermutable cells and organisms; the use of introducing genes into cells and transgenic animals by which new cell lines and animal varieties with new and useful properties can be prepared more efficiently than by relying on the natural rate of mutation; and use of mutagens for enhancing a rate of further augmented mutation.
摘要:
Yeast cells are mutagenized to obtain desirable mutants. Mutagenesis is mediated by a defective mismatch repair system which can be enhanced using conventional exogenously applied mutagens. Yeast cells with the defective mismatch repair system are hypermutable, but after selection of desired mutant yeast strains, they can be rendered genetically stable by restoring the mismatch repair system to proper functionality.
摘要:
Dominant negative alleles of human mismatch repair genes can be used to generate hypermutable cells and organisms. By introducing these genes into cells and transgenic animals, new cell lines and animal varieties with novel and useful properties can be prepared more efficiently than by relying on the natural rate of mutation. These methods are useful for generating genetic diversity within immunoglobulins genes directed against an antigen of interest to produce altered antibodies with enhanced biochemical activity. Moreover, these methods are useful for generating antibody-producing cells with increased level of antibody production. The invention also provides methods for increasing the affinity of monoclonal antibodies and monoclonal antibodies with increased affinity.
摘要:
Yeast cells are mutagenized to obtain desirable mutants. Mutagenesis is mediated by a defective mismatch repair system which can be enhanced using conventional exogenously applied mutagens. Yeast cells with the defective mismatch repair system are hypermutable, but after selection of desired mutant yeast strains, they can be rendered genetically stable by restoring the mismatch repair system to proper functionality.
摘要:
Bacteria are manipulated to create desirable output traits using dominant negative alleles of mismatch repair proteins. Enhanced hypermutation is achieved by combination of mismatch repair deficinecy and exogenously applied mutagens. Stable bacteria containing desirable output traits are obtained by restoring mismatch reparir activity to the bacteria.
摘要:
Bacteria are manipulated to create desirable output traits using dominant negative alleles of mismatch repair proteins. Enhanced hypermutation is achieved by combination of mismatch repair deficinecy and exogenously applied mutagens. Stable bacteria containing desirable output traits are obtained by restoring mismatch reparir activity to the bacteria.
摘要:
The present invention provides a recombinantly expressed human monoclonal antibody that specifically binds to granulocyte macrophage colony stimulating factor (GM-CSF) wherein said antibody comprises a heavy chain comprising a CDR1 of SEQ ID NO: 46, a CDR2 of SEQ ID NO: 47, and a CDR3 of SEQ ID NO: 48 and a light chain comprising a CDR1 of SEQ ID NO: 49, a CDR2 of SEQ ID NO: 50, and a CDR3 of SEQ ID NO: 51.
摘要:
The present invention provides methods and kits for assessing whether a subject is afflicted with an FRα-expressing cancer, methods and kits for predicting the progression of ovarian cancer in a subject afflicted with an FRα-expressing cancer, methods and kits for assessing the level of risk that a subject will develop an FRα- expressing cancer, and methods of stratifying a subject with an FRα-expressing cancer into cancer therapy groups. The methods involve determining the level of folate receptor alpha (FRα) which is not bound to a cell in a sample derived from the subject and comparing this level with the level of FRα in a control sample.
摘要:
The present invention features mammalian expression vectors that are useful for controlling DNA hypermutability in mammalian cell as well as the encoding polynucleotide sequences of vector sequences. In related aspects the invention features expression vectors and host cells comprising such polynucleotides. In other related aspects, the invention features transgenic cells expressing a mutator gene to enhance genome-wide mutagenesis, due to, for example, the presence of an exogenous mutator-encoding polynucleotide sequence. Further, the invention provides methods for using vector sequences that can remove the expression of such gene to restore DNA stability in a host cell.