SPECIALTY TOPICS · GUIDE
RNA Therapy vs Gene Therapy
RNA therapies change how genes' instructions are used; gene therapies add or edit genetic material. This page compares them in plain language, with approved examples, risks and limits.
Content last updated . This page has not been medically reviewed.
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- Gene therapy alters the genetic code to recover the function of critical proteins. Gene transfer introduces new genetic material into cells, and genome editing changes existing DNA. [1]
- RNA therapies use pieces of RNA. MedlinePlus explains that they do not alter genes themselves; they change whether or how a gene's instructions are carried out to make proteins. [2] Many interact with messenger RNA (mRNA) and so influence how much protein is produced from a gene. [2]
- Examples of RNA therapies: antisense oligonucleotide (ASO), small interfering RNA (siRNA) and microRNA (miRNA) therapies. [2] One review also covers mRNA-based drugs. [3]
For detail see RNA Interference and siRNA Therapies, mRNA-Based Therapies Beyond Vaccines and Gene Addition and Gene Therapy Explained.
The difference at a glance
| RNA therapy | Gene therapy | |
|---|---|---|
| What it acts on | The message made from a gene, so protein production changes [2] | The genetic code or cell: adds, replaces or edits genetic material [1] |
| Changes DNA? | Not in the examples described (ASO, siRNA, miRNA) [2] | Yes, by design [1] |
| Delivery issues | Lipid nanoparticles were used to deliver the first approved RNAi drug [4] | Vectors, often modified viruses, or nanoparticles [1] |
| Approved examples | Onpattro (patisiran), described in a 2026 review as the first FDA-approved RNAi therapy; the review says several RNA drugs have been approved [4][3] | Products on the FDA's approved list, for example Casgevy [5] |
| Known risks | Delivery and immune-related barriers are discussed in reviews [4] | Dangerous immune responses; some vectors can cause errors leading to cancer [1] |
| US regulator route | Not verified in the sources read here | Biologics license application through FDA's CBER [6] |
What the evidence shows
Each approved RNA or gene product has its own trials, label and approved indication. That is why this page does not state a general effectiveness rate for either category.RNA therapies. One 2026 review describes Onpattro as using lipid nanoparticles to silence transthyretin in hereditary amyloidosis and notes remaining barriers such as nanoparticle stability, targeted delivery, immunogenicity and manufacturing scale. [4] Another says several RNA drugs have been approved while others are still in trials for a few diseases. [3] These are narrative reviews, not trial results; for exact indications and risks, the regulator's label for the specific drug is the source. Evidence label: approved medicine for the specific products and indications on regulator lists; investigational for most others.
Gene therapies. MedlinePlus says early studies showed serious risks such as toxicity, inflammation and cancer. [7] The FDA's approved list names many products, each approved for its own indication. [5] See Approved Gene and RNA Therapies: Examples and Indications.
Head-to-head comparison. Proper evidence not found. The sources read for this page contained no trials comparing an RNA therapy directly with a gene therapy,.
Keep these apart
- An RNA vaccine, an RNA drug, a CAR T-cell therapy and a gene-edited cell product are different things. MedlinePlus lists CAR T cell therapy, which introduces a gene into a person's T cells, separately from RNA therapy. [2]
- The approval of one product does not apply to others with similar names.
- No sequence, dose or preparation details are given here. These are prescription medicines or specialist procedures; decisions belong with the prescriber. Do not start or stop any medicine based on this page.
Regulatory statements here concern the United States only and are not legal advice; laws differ elsewhere. More: Investigational Gene and RNA Applications.
Frequently asked questions
Does RNA therapy change my DNA?
The RNA therapies MedlinePlus describes, such as ASO, siRNA and miRNA, change how a gene's instructions are used and do not alter the genes themselves. [2]
Is gene editing the same as an RNA therapy?
No. Genome editing changes existing DNA in the cell, [8] while RNA therapies work on how instructions are carried out. [2]
Is any RNA drug approved?
A 2026 review describes Onpattro as the first FDA-approved RNAi therapy and says several RNA drugs have been approved. [4][3]
Which is safer?
No comparison can be made from the sources read. Each product has its own risks; gene-therapy vectors can trigger dangerous immune responses. [1]
References
- MedlinePlus Genetics, How does gene therapy work?. Read 2026-10-22.
- MedlinePlus Genetics, What are CAR T cell therapy, RNA therapy, and other genetic therapies?. Read 2026-10-22.
- Review of RNA-based drugs, Front Cell Dev Biol 2026 (PubMed 42746222). Read 2026-10-22.
- Review of RNAi therapies and Onpattro, Iran J Basic Med Sci 2026 (PubMed 42609949). Read 2026-10-22.
- FDA, Approved Cellular and Gene Therapy Products (current as of 09/17/2026). Read 2026-10-22.
- FDA, What is Gene Therapy? (current as of 07/25/2018). Read 2026-10-22.
- MedlinePlus Genetics, Is gene therapy safe?. Read 2026-10-22.
- MedlinePlus Genetics, What is gene therapy?. Read 2026-10-22.