---
title: "Exon‑skipping therapy for Duchenne muscular dystrophy offers benefit to a small subset of patients"
id: "stat-news-2-stat-in-duchenne-muscular-dystrophy-a-promising-therapy-is-available-to-a"
canonical_url: "https://medichelpline.com/clinical-feed/stat-news-2-stat-in-duchenne-muscular-dystrophy-a-promising-therapy-is-available-to-a"
content_type: "clinical_feed_article"
specialty: "Neurology"
source_name: "STAT News"
source_url: "https://www.statnews.com/2026/10/07/muscular-dystrophy-exon-skipping-drugs-novartis-dyne/?utm_campaign=rss"
published_at: "2026-10-07T08:30:00.000Z"
evidence_level: "Verified Feed"
license: "CC-BY-NC-4.0 / Informational Use"
---
# Exon‑skipping therapy for Duchenne muscular dystrophy offers benefit to a small subset of patients
## Provenance & Clinical Metadata
- **Canonical URL:** https://medichelpline.com/clinical-feed/stat-news-2-stat-in-duchenne-muscular-dystrophy-a-promising-therapy-is-available-to-a
- **Specialty:** [Neurology](https://medichelpline.com/clinical-feed/neurology.md)
- **Primary Source:** STAT News
- **Source URL:** [Original Journal Publication](https://www.statnews.com/2026/10/07/muscular-dystrophy-exon-skipping-drugs-novartis-dyne/?utm_campaign=rss)
- **Published At:** 2026-10-07T08:30:00.000Z
- **Evidence Rating:** Verified Feed
## Executive GIST (TL;DR)
- A new **exon‑skipping** medicine developed by Avidity Biosciences, called **Del‑zota**, is under FDA review and has generated strong interest among families of boys with **Duchenne muscular dystrophy**. - The drug’s mechanism is to induce cellular protein‑making machinery to “skip” a specific exon in the dystrophin gene, enabling production of a shortened but functional protein essential for muscle survival. - In clinical testing, the approach “appeared to virtually arrest the disease in some patients,” according to trial reporting in the source. - Exon‑skipping strategies could, in principle, address mutations in roughly **70%** of the estimated 10,000–15,000 U.S. Duchenne patients, but medicines must be tailored to each patient’s specific mutation. - Avidity’s Del‑zota is only appropriate for about **7%** of patients — approximately **900** Americans — because of its mutation‑specific design, leaving most patients ineligible. - The article contrasts two children, Yannick and Brecken: Yannick is declining, while Brecken began receiving the experimental drug and has shown surprising improvement, prompting parents to press companies to accelerate development and access. - The reporting is behind a STAT+ paywall; additional details from the original story were not available in the source excerpt provided here. - Where the source lacked information (for example, comprehensive trial data, regulatory timeline, pricing, broader access plans, and long‑term safety and efficacy outcomes), those specifics were not reported and therefore are not included here.
## Clinical Analysis & Structured Key Points
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Test your knowledge with our new weekday mini crossword [ Start solving ](https://www.statnews.com/stat-mini-crossword/) [STAT Plus](https://www.statnews.com/stat-plus/)[Biotech](https://www.statnews.com/category/biotech/) # In Duchenne muscular dystrophy, a promising therapy is available to a fortunate few ## Word of a potent new medicine has parents clamoring for companies to move faster * [Manage alerts for this article](https://www.statnews.com/my-account/edit/#emails) * [Save this story for later](https://www.statnews.com/my-account/saved/) * [Share this article](https://www.statnews.com/2026/10/07/muscular-dystrophy-exon-skipping-drugs-novartis-dyne/?utm_campaign=rss) ![](https://www.statnews.com/wp-content/uploads/2026/10/Exon-Skipping-handout-645x645.jpg) Yannick and his mother Elena Etienne, along with Brecken and his mother Marit Siverston at the United Nations in 2025, for World Duchenne Awareness Day.Courtesy Marit Siverston ![](https://www.statnews.com/wp-content/uploads/2022/05/jason-mast-avatar-round-80x80.png) By [Jason Mast](https://www.statnews.com/staff/jason-mast/) Oct. 7, 2026 General Assignment Reporter ![](https://www.statnews.com/wp-content/uploads/2022/05/jason-mast-avatar-round-80x80.png) [Jason Mast](https://www.statnews.com/staff/jason-mast/) 1. [](https://x.com/JasonMMast "X") jason.mast@statnews.com Jason is a general assignment reporter, with particular focus on genetic medicine and rare disease. Confidential tips can be sent on Signal at JasonMast.77. There’s a boy like you in Minnesota, Yannick’s mom told him a few years ago. He has the same disease. He has the same kind of smile. Maybe you could talk? They clicked. After school and on weekends, the two boys boot up their computers, Yannick in San Diego and Brecken in a suburb of St. Paul, Minn. They play Roblox or build virtual worlds on Minecraft: a zoo, for example, like the real-world one 13-year-old Yannick wants to build when he grows up, full of lions, tigers, and giraffes. Advertisement They seldom talk about Duchenne muscular dystrophy, the rare fatal muscle-wasting disease they live with. But lately it’s all their moms can talk about. In stolen phone calls on the way to coffee or back from school, they compare the two boys: how quickly Yannick is declining and how steadily Brecken is — shockingly — improving. Last winter,Brecken, 12, started receiving an experimental drug developed by Avidity Biosciences. The medicine makes the cell’s protein-building machinery “skip” part of the gene, called an exon, behind Duchenne, allowing patients to make a shortened but functional version of a protein essential for muscle survival. In trials, it appeared to virtually [arrest the disease in some patients](https://www.statnews.com/2026/04/08/duchenne-exon-skipping-breakthrough-one-mother-quest/). The approach, however, is out of most patients’ reach. In principle, “skipping” strategies could[ benefit about 70%](https://pmc.ncbi.nlm.nih.gov/articles/PMC11593839/) of the 10,000 to 15,000 Duchenne boys and men in the U.S. (The disease almost exclusively affects males.) But the medicines have to be targeted to a patient’s specific mutation. Only about 7% of patients — or roughly 900 Americans — are eligible for Avidity’s drug, called Del-zota, which is now under Food and Drug Administration review. STAT+ Exclusive Story Already have an account? [Log in](https://www.statnews.com/login/) ![STAT+](https://www.statnews.com/wp-content/themes/stat/images/stat-plus-breaker-bg.png) [ ![STAT+](https://www.statnews.com/wp-content/themes/stat/images/stat-plus-logo-white.svg) ](https://www.statnews.com/stat-plus/) ## This article is exclusive to STAT+ subscribers ### Unlock this article — plus daily coverage and analysis of the biotech sector — by subscribing to STAT+. Already have an account? 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