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18 Cards in this Set

  • Front
  • Back

Gene therapy

a novel approach to treating disease based on modifying the expression of a person's genes toward a therapeutic goal

somatic gene therapy

manipulation of gene expression in cells so as to be corrective for the patient

germline gene therapy

involves genetic modification of germ cells that will pass the selected change onto the next generation

What do the vast majority of clinical trials involving gene therapy treat?

cancer

are there any FDA approved gene therapy products currently on the market??

Nah

therapeutic strategies of gene therapy

vector carries a gene that encodes a protein that is either defective or not present due to mutations in the patients' endogenous genes

cytolytic strategy of gene therapy

vector is designed to destroy or eliminate a diseased cell or tissue


(often induces production of toxic product)

viral vectors

gene delivery vehicles


trick is to remove disease-causing components and insert recombinant genes that will be therapeutic

liposome transfection

complexes of DNA and lipids

"Gene Gun" technology

delivery of DNA on gold particles, primarily for DNA vaccines

adenovirus

episomal


high transduction efficiency


infects replicating AND non-replicating


elicits immune response

adeno-associated virus

integrates into human chromosome 19


low immunogenicity


no associated disease


infects replicating AND non-replicating

herpes

large insert capacity


broad host range


replicating AND non-repicating cells

liposomes/naked DNA

no limit to size of genes that can be delivered


low immunogenicity


poor levels of gene transfer

retrovirus

non-pathogenic


transduces only NON-DIVIDING cells


long term expression


inactivated by human complement

Which vectors infect both replicating and non-replicating cells

Adenovirus


adeno-associated virus


herpesvirus



Which vector is best for getting into non-dividing cells?

HIV/Lentivirus/Retrovirus vectors

CRISPR/Cas9 system

allows for specific gene editing by expressing Cas9 and specifically designed cRISPRs such that any organism's genome can be cut at any desired location allowing specific replacement of a defective gene with a functional one