Gene Therapy and Therapeutic Engineering
Engineering for Therapy
Therapeutic approaches
Genetic engineering can treat disease by replacing defective genes, silencing harmful genes, editing mutations, or modifying immune cells. Each approach has tradeoffs in delivery, durability, specificity, and safety.
Therapy strategies
Gene addition
- Adds a functional copy
- Useful when loss of function causes disease
Gene editing
- Corrects or disrupts a target sequence
- Can be highly precise
Which strategy is most associated with permanently changing the genome?
Genome editing changes DNA, which can have lasting effects in the edited cells.
Correct answer: Gene editing
Why must therapeutic genetic engineering be especially careful about off-target effects?
Clinical use demands high specificity and safety.
Correct answer: Because unintended changes can harm healthy cells or create new risks
What is a common challenge in gene therapy delivery?
Targeted delivery is one of the biggest practical obstacles in therapy.
Correct answer: Getting DNA or RNA into the right cells
Clinical caution
Therapeutic editing must be evaluated for efficacy, immune response, long-term persistence, and unintended genomic changes.
Clinical development pipeline
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1
Step 1: Define the disease mechanism.
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2
Step 2: Choose the therapeutic strategy.
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3
Step 3: Optimize delivery and expression.
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4
Step 4: Test efficacy and safety in preclinical models.
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5
Step 5: Evaluate in phased clinical studies.
What is the difference between somatic and germline therapy?
Somatic edits treat the patient; germline edits can pass to future generations.
Correct answer: Somatic therapy affects non-reproductive cells, while germline changes can be inherited