Gene Therapy Innovations and Viral Vector Applications

Gene therapy treats diseases by altering genetic material in cells, often using viral vectors. These vectors, derived from viruses, deliver therapeutic genes into cells. There are four main types: AAVs, adenoviral, lentiviral, and retroviral vectors. AAVs are used for non-dividing cells but face immune challenges. Adenoviral vectors can carry larger DNA but initially caused strong immune responses, which have been mitigated. Lentiviral and retroviral vectors integrate into the genome, suitable for ex vivo treatments. Gene therapy is already treating some diseases and is under study for more applications.

What is the primary goal of gene therapy?

• To enhance physical abilities

• To improve memory and cognitive function

• To treat diseases by altering genetic material

• To change a person's appearance

Why are viruses commonly used as vectors in gene therapy?

• They are harmless to humans

• They are inexpensive

• They are naturally efficient at entering cells

• They are easy to produce

What is a key limitation of adeno-associated viral vectors (AAVs)?

• They cause strong immune responses

• They can only target dividing cells

• They integrate into the cell's genome

• They may be ineffective in patients with prior exposure

In which type of cells are AAVs typically used?

• Cancer cells

• Non-dividing cells

• Dividing cells

• Bacterial cells

What improvement has been made to adenoviral vectors?

• They are now used for bacterial infections

• They can only carry small DNA packages

• They cause milder immune responses

• They can now integrate into the genome

What is a unique feature of lentiviral and retroviral vectors?

• They do not integrate into the genome

• They are only used for non-dividing cells

• They are used for in vivo treatments

• They integrate into the genome of target cells

What is the process called when cells are modified outside the body and then returned?

• In vivo treatment

• Cellular therapy

• Ex vivo treatment

• Gene editing

Which type of cells are often targeted in ex vivo treatments using lentiviral vectors?

• Nerve cells

• T cells and stem cells

• Muscle cells

• Liver cells

What diseases are currently being treated with gene therapy using viral vectors?

• Rare inherited diseases and certain cancers

• Diabetes

• Heart diseases

• Common colds

Where can more information about gene therapy be found?

• geneticresearch.org

• asgct.org

• viralvectors.net

• genetherapy.com