Gene therapy aims to treat disease by addressing its genetic cause. This lesson explains how introducing or correcting a functional gene may help cells make a needed protein, and why the approach can also carry serious risks.
Some diseases arise because a mutation prevents a cell from producing a protein it needs. In Severe Combined Immunodeficiency (SCID), for example, genetic abnormalities can disrupt the function of white blood cells essential to immune defense.
All flashcards
What is gene therapy?
An approach to treating disease by adding functional genetic instructions or correcting a mutation.
What is a vector in gene therapy?
A delivery system that carries therapeutic genetic material into cells.
What is an off-target effect in gene therapy?
An unintended effect on cells or genes outside the intended treatment target.
What is informed consent in a clinical trial?
A participant's agreement after receiving relevant information about the trial, including its risks.
Why is the Jesse Gelsinger case significant?
His death after an adenovirus-vector treatment highlighted safety, risk disclosure, and oversight concerns.
Quiz questions
What is the central aim of gene therapy?Answer: To address a disease-related genetic defect by adding or correcting genetic instructions.
What role can an adapted virus play in gene therapy?Answer: It can carry therapeutic genetic material into cells.
How can a viral vector cause organ damage?Answer: It may provoke a strong inflammatory immune response.
How could insertion of a therapeutic gene contribute to cancer?Answer: It could disrupt a gene that normally helps control cell growth.
Why can financial interests create a conflict in gene therapy research?Answer: They may bias judgments about evidence, risks, or whether a trial should proceed.
Based on Microbiology by Nina Parker, Mark Schneegurt, Anh-Hue Thi Tu, Philip Lister, Brian M. Forster (OpenStax), licensed CC BY 4.0. Adapted into a summary, flashcards and quizzes.