超星 - test 5 - 查题吧

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Whichofthefollowingstatementsaboutthedefinitionof'genetherapy'byFarlexPartnerMedicalDictionaryarecorrect?

A. Gene therapy has several applications in oncology, including the transduction into malignant tumor cells of genes encoding cytokines or coactivation factors to augment host antitumor responses and the transfer of tumor suppressor genes, particularly p53 (the most commonly mutated gene found in human cancers), to enhance the sensitivity of malignant cells to chemotherapeutic agents.
B. Use of viral vectors is associated with a risk of localized and systemic inflammation mediated by cytokines, which can be fatal.
C. Germ-line therapy inserts specific genes directly into the DNA of sperm, egg, or embryo, producing heritable alterations of the genome.
D. Progresshasbeenmadeintreatingseveralinheriteddisorders,includingseverecombinedimmunodeficiency,cysticfibrosis,andhemophiliaB.

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Which of the following statements about viral vectors for gene therapy are correct?

A. In order to replicate, viruses introduce their genetic material into the host cell, tricking the host’s cellular machinery into using it as blueprints for viral proteins.
B. Retroviruses go a stage further by having their genetic material copied into the genome of the host cell.
C. A number of viruses have been used for human gene therapy, including retroviruses, adenoviruses, herpes simplex, vaccinia, and adeno-associated virus (AAV).
D. Like the genetic material (DNA or RNA) in viruses, therapeutic DNA can be designed to simply serve as a temporary blueprint that is degraded naturally or (at least theoretically) to enter the host's genome, becoming a permanent part of the host's DNA in infected cells.

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Whichofthefollowingstatementsabout non-viralvectorsforgenetherapyarecorrect?

A. Non-viral methods present certain advantages over viral methods, such as large scale production and low host immunogenicity.
B. However, non-viral methods initially produced lower levels of transfection and gene expression, and thus lower therapeutic efficacy.
C. Later technology remedied this deficiency.
D. Methods for non-viral gene therapy include the injection of naked DNA, electroporation, the gene gun, sonoporation, magnetofection, the use of oligonucleotides, lipoplexes, dendrimers, and inorganic nanoparticles.

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Which of the following viruses are commonly used as vectors in gene therapy?

A. adenovirus
B. AAV
C. retrovirus
D. vaccinia virus

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Whichofthefollowingvirusesarecommonlyusedasvectorsingenetherapy?

A. adenovirus
B. poxvirus
C. Herpes Simplex virus
D. lentivirus

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Which of thefollowingdiseases havebeentestedforgenetherapyinpatients?

A. X-linkedseverecombinedimmunedeficiency(X-SCID)
B. SCIDlinkedwithdeficiencyofadenosinedeaminase(ADA-SCID)
C. lipoproteinlipasedeficiency(LPLD)
D. Leber'scongenitalamaurosis(LCA)

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Which of thefollowingdiseases havebeentestedforgenetherapyinpatients?

A. Wiskott-Aldrich syndrome
B. hemophilia B
C. cystic fibrosis
D. sickle cell disease

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Whichofthefollowingdiseaseshavebeentestedforgenetherapyinpatients?

A. muscular dystrophy
B. β-thalassemia
C. Parkinson's disease
D. cancers

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Whichofthefollowingdiseaseshavebeentestedforgenetherapyinpatients?

A. α1-antitrypsin deficiency
B. Stargardt disease
C. lung cancer
D. Leber congenital amaurosis

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Which of the following statements about the doses ofImlygic are correct?

A. The total injection volume for each treatment by Imlygic visit should not exceed 4 ml for all injected lesions combined.It may not be possible to inject all lesions at each treatment visit or over the full course of treatment.
B. Previously injected and/or uninjected lesion(s) may be injected at subsequent treatment visits.
C. The initial recommended dose is up to 4 ml of Imlygic at a concentration of 10^6 (1 million) PFU per ml.
D. The recommended dose for subsequent administrations is up to 4 ml of Imlygic at a concentration of 10^8 (100 million) PFU per ml.

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