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In Vivo CRISPR Gene Editing When the Cause Is in Your Genes
A treatment designed to correct or switch off a faulty gene from inside the body, often from a single infusion. Here, you choose the practices you want to talk to about it.
Investigational
In vivo gene editing is investigational and available through clinical trials. One CRISPR-based therapy is FDA-approved, but it edits cells outside the body.
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What Is In Vivo CRISPR Gene Editing?
CRISPR is a tool that can find a precise spot in your DNA and change it. “In vivo” means the editing happens inside your body: the editing instructions are delivered, usually by an infusion, to the cells that need them, most often in the liver.
Some approaches cut a gene to turn it off. Newer ones, called base editing and prime editing, change a single letter of DNA without cutting both strands. The goal in each case is to treat the cause of a genetic disease rather than manage its symptoms for a lifetime.
Conditions It’s Used or Studied For
Transthyretin Amyloidosis
Hereditary Angioedema
Inherited High Cholesterol
Rare Metabolic Disorders
Other Single-Gene Conditions
Only your physician can say whether it is right for you.
Before You Match
What to Know
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It Is Still Investigational
In vivo editing is offered through clinical trials, which have their own eligibility rules. A practice can tell you whether a study fits your diagnosis.
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Edits Are Meant to Last
Most in vivo edits are designed to be permanent. Ask about what is known, and not yet known, about long-term effects.
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Genetic Testing Comes First
Eligibility usually depends on a confirmed genetic diagnosis. Bring any test results you already have.
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Expect Long Follow-Up
Trials commonly follow participants for years after treatment. Ask what visits and monitoring would involve.
More About In Vivo CRISPR Gene Editing
Health e Match summarized this information from the sources listed below. It is general information, not medical advice.
Who Is a Candidate?
In vivo gene editing is offered through clinical trials, and each trial sets its own requirements. Most enroll adults with a confirmed genetic diagnosis for the specific gene being edited, such as transthyretin (ATTR) amyloidosis, hereditary angioedema, or inherited high cholesterol.
Studies usually ask for genetic test results, a stable medical history, and adequate liver function, since most current approaches deliver the edit to the liver. People who are pregnant or planning a pregnancy are generally not eligible. A study team is the only one who can say whether you qualify.
What to Expect
Most in vivo editing studied so far is given once, as an intravenous infusion over a few hours. The editing instructions travel inside tiny fat particles (lipid nanoparticles) that are taken up mainly by the liver. Medicines to reduce infusion reactions are often given beforehand.
You can expect several screening visits before treatment, an observation period on the day of the infusion, and frequent blood tests in the weeks after.
Recovery and Follow-Up
Many people go home the same day or after a short observation period. Early follow-up focuses on liver blood tests and on measuring the protein the edit is meant to change.
Because edits are designed to be permanent, the FDA expects gene-editing studies to follow participants for many years, up to 15 years. Ask how often visits happen and whether any can be done closer to home.
Risks and Side Effects
Reported side effects in early studies include infusion-related reactions and temporary rises in liver enzymes. Because the change to your DNA is meant to last, it cannot simply be stopped or reversed the way a medicine can.
Researchers also watch for unintended edits elsewhere in the genome and for effects that may only appear years later. These unknowns are a main reason long-term follow-up is required.
Cost and Insurance
In a clinical trial, the investigational treatment is usually provided by the study sponsor at no cost. Routine care during the study, such as standard visits and tests, may be billed to your insurance.
Ask the study team for a written list of what is covered, whether travel and lodging are reimbursed, and what your insurance will be asked to pay.
Choosing a Practice
Questions worth asking in your first conversation:
- Is the study enrolling now, and what phase is it?
- How many people have been treated so far?
- Is genetic counseling available as part of the program?
- How long is follow-up, and who do I contact about side effects?
Alternatives to Consider
For many of these conditions there are approved treatments that do not edit DNA. For ATTR amyloidosis these include medicines that stabilize the protein and RNA-based therapies that lower it; for hereditary angioedema, preventive medications; and for inherited high cholesterol, statins and PCSK9-lowering therapies. One CRISPR-based therapy that edits cells outside the body is approved for sickle cell disease and beta thalassemia. Your physician can compare these with a trial.
Sources
Find a Practice That Offers It
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Questions
What Patients Ask
Is CRISPR gene editing FDA-approved?
One CRISPR-based therapy is approved for sickle cell disease and beta thalassemia, but it edits a patient’s cells outside the body before they are returned. Editing inside the body, in vivo, is still investigational and available through clinical trials.
How is in vivo editing different from gene therapy?
Traditional gene therapy adds a working copy of a gene. In vivo editing changes the gene you already have, either turning it off or correcting it.
Can Health e Match enroll me in a gene editing trial?
No. We introduce you to practices, and a practice decides with you whether any study or treatment is appropriate. Health e Match does not provide medical care or enroll anyone in research.
What should I put on my profile?
Your diagnosis, any genetic test results, the symptoms you live with, and that you are exploring gene editing. The more you share, the better your matches.
Start Matching Today
Build a free profile in minutes. List what you’re living with and that you’re exploring in vivo CRISPR gene editing, and meet the practices that treat it.
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This page is general information, not medical advice, and it was last updated October 15, 2026. healthematch.com makes introductions between patients and practices in the United States. It does not provide medical care, does not enroll anyone in clinical research, and does not recommend any particular procedure or provider. Where a practice has documented a therapy’s regulatory status, it is shown exactly as documented. Are you a practice? See the in vivo CRISPR gene editing page for practices.