{"id":346,"date":"2026-01-28T04:19:28","date_gmt":"2026-01-28T12:19:28","guid":{"rendered":"https:\/\/scienceblog.com\/sciencechina\/?p=346"},"modified":"2026-01-28T04:19:49","modified_gmt":"2026-01-28T12:19:49","slug":"new-technique-unlocks-gene-therapy-for-hundreds-of-conditions","status":"publish","type":"post","link":"https:\/\/scienceblog.com\/sciencechina\/2026\/01\/28\/new-technique-unlocks-gene-therapy-for-hundreds-of-conditions\/","title":{"rendered":"New Technique Unlocks Gene Therapy for Hundreds of Conditions"},"content":{"rendered":"

Gene therapy just leapt past a barrier that’s held it back for years. Researchers in China have worked out how to pack oversized genes into the viral delivery vehicles that doctors use to treat genetic diseases, a trick that could unlock treatments for hundreds of conditions previously considered untreatable.<\/p>\n

The breakthrough centres on adeno-associated viruses, or AAVs. These microscopic packages are the workhorses of gene therapy because they’re safe and effective at ferrying therapeutic DNA into cells. There’s a catch, though. They can only carry small genetic cargoes, typically under 5 kilobases (a measure of DNA length).<\/p>\n

That’s fine for some diseases. But roughly 37.5% of genes linked to autism are bigger than that limit. Same goes for genes behind certain epilepsies, muscular dystrophies and hundreds of other inherited conditions. For years, scientists have been trying workarounds – splitting genes into pieces, using multiple viruses, hoping the fragments reassemble properly inside cells. The results have been, to put it mildly, hit and miss.<\/p>\n

Now Zhonghua Lu at the Shenzhen Institutes of Advanced Technology and his colleagues have developed what they’re calling AAVLINK, which uses a molecular cutting-and-pasting system to stitch together oversized genes with remarkable efficiency. The team split large therapeutic genes into two or three chunks, packaged them into separate AAV particles, then programmed the fragments to recombine inside target cells using a protein called Cre recombinase.<\/p>\n

The clever bit is what happens after the fragments join up. The recombination process automatically switches off Cre production, which addresses a longstanding safety concern about these systems. And unlike previous split-gene approaches, AAVLINK produces very few incomplete or malformed proteins, the sort of molecular junk that can cause problems in cells.<\/p>\n

To test whether this actually works in living animals, the team focused on two devastating childhood conditions. Phelan-McDermid syndrome is caused by mutations in SHANK3, a gene too large for standard AAV delivery (the syndrome typically involves intellectual disability and autism-like behaviours). When Lu’s group used AAVLINK to deliver intact SHANK3 to mice with the condition, the animals showed fewer repetitive behaviours and better motor coordination. Hardly a cure, perhaps, but meaningful improvements.<\/p>\n

The second test was even more dramatic. Dravet syndrome is a severe form of childhood epilepsy, and more than 80% of cases trace back to a faulty copy of SCN1A, another gene that exceeds AAV’s carrying capacity. Mice with Dravet syndrome usually die within three weeks. The team delivered working copies of SCN1A using AAVLINK, and the treated mice lived longer, had fewer seizures and showed more normal brain activity.<\/p>\n

What’s particularly useful – if you’re thinking about translating this to human patients – is that the researchers built a whole library of AAVLINK vectors covering 193 disease-associated genes plus five different CRISPR gene-editing tools. They’ve tested them all in cultured cells to verify the genes reassemble properly. That’s quite a resource for anyone wanting to develop new therapies.<\/p>\n

The approach also worked in monkeys, which suggests it might translate to humans reasonably well. Lu’s team injected the split-gene system into cynomolgus macaques and saw robust gene expression in the brain, roughly comparable to what they’d seen in mice.<\/p>\n

There are competing technologies, of course. A team in the US recently described something called StitchR, which uses a different molecular mechanism to join gene fragments together. But in head-to-head comparisons, AAVLINK produced more complete proteins and fewer unwanted by-products. Whether that advantage holds up in human trials remains to be seen.<\/p>\n

The researchers have also developed a second-generation version called AAVLINK2.0, which degrades the Cre protein even more rapidly after it’s done its job. That’s meant to address lingering worries about having this foreign protein hanging about in cells long-term, though it’s worth noting Cre has been used in thousands of biology experiments over the years without causing obvious problems.<\/p>\n

Clinical applications are still some way off. The team needs to test AAVLINK in larger animals, work out optimal dosing, and demonstrate long-term safety. Regulatory approval will take years, assuming it comes at all. And there’s always the question of cost; AAV-based gene therapies already run to millions of pounds per patient.<\/p>\n

Still, for families dealing with genetic diseases that until now have been out of reach, this sort of technical advance offers something rare in medicine. Genuine hope.<\/p>\n

Study link: https:\/\/www.cell.com\/cell\/fulltext\/S0092-8674(25)01488-6<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Gene therapy just leapt past a barrier that’s held it back for years. Researchers in China have worked out how to pack oversized genes into the viral delivery vehicles that doctors use to treat genetic diseases, a trick that could unlock treatments for hundreds of conditions previously considered untreatable. The breakthrough centres on adeno-associated viruses, … Read more<\/a><\/p>\n","protected":false},"author":2,"featured_media":347,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","_links_to":"","_links_to_target":""},"categories":[6,2],"tags":[],"class_list":["post-346","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-health","category-technology","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-50"],"yoast_head":"\nNew Technique Unlocks Gene Therapy for Hundreds of Conditions - SciChi<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/scienceblog.com\/sciencechina\/2026\/01\/28\/new-technique-unlocks-gene-therapy-for-hundreds-of-conditions\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"New Technique Unlocks Gene Therapy for Hundreds of Conditions\" \/>\n<meta property=\"og:description\" content=\"Gene therapy just leapt past a barrier that’s held it back for years. 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In multiple sclerosis, the immune\u2026","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Yak","src":"https:\/\/i0.wp.com\/scienceblog.com\/sciencechina\/wp-content\/uploads\/sites\/16\/2026\/03\/pexels-soulofmurcidus-8843014.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/scienceblog.com\/sciencechina\/wp-content\/uploads\/sites\/16\/2026\/03\/pexels-soulofmurcidus-8843014.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/scienceblog.com\/sciencechina\/wp-content\/uploads\/sites\/16\/2026\/03\/pexels-soulofmurcidus-8843014.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/scienceblog.com\/sciencechina\/wp-content\/uploads\/sites\/16\/2026\/03\/pexels-soulofmurcidus-8843014.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":159,"url":"https:\/\/scienceblog.com\/sciencechina\/2025\/05\/19\/scientists-find-protein-that-could-upend-osteoporosis-treatment\/","url_meta":{"origin":346,"position":2},"title":"Scientists Find Protein That Could Upend Osteoporosis Treatment","author":"SciChi","date":"May 19, 2025","format":false,"excerpt":"A protein previously known for its role in brain and reproductive function may offer new hope for millions suffering from osteoporosis, according to a groundbreaking study published in Bone Research last month. Scientists have discovered that Neural EGFL-like 2 (NELL2) plays a crucial role in maintaining bone health\u2014potentially opening the\u2026","rel":"","context":"In "Health"","block_context":{"text":"Health","link":"https:\/\/scienceblog.com\/sciencechina\/category\/health\/"},"img":{"alt_text":"Osteoporosis is a disease of bone where there is reduced bone mineral density (R), increasing the likelihood of fractures.","src":"https:\/\/i0.wp.com\/scienceblog.com\/sciencechina\/wp-content\/uploads\/sites\/16\/2025\/05\/1600px-Osteoporosis_in_Bones.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/scienceblog.com\/sciencechina\/wp-content\/uploads\/sites\/16\/2025\/05\/1600px-Osteoporosis_in_Bones.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/scienceblog.com\/sciencechina\/wp-content\/uploads\/sites\/16\/2025\/05\/1600px-Osteoporosis_in_Bones.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/scienceblog.com\/sciencechina\/wp-content\/uploads\/sites\/16\/2025\/05\/1600px-Osteoporosis_in_Bones.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":237,"url":"https:\/\/scienceblog.com\/sciencechina\/2025\/08\/05\/aging-may-be-reversible-thanks-to-new-metabolic-theory\/","url_meta":{"origin":346,"position":3},"title":"Aging May Be Reversible Thanks to New Metabolic Theory","author":"SciChi","date":"August 5, 2025","format":false,"excerpt":"A new theory called Pro-Aging Metabolic Reprogramming (PAMRP) is offering scientists a fresh way to understand how and why we age\u2014and what we might do about it. Proposed by researchers Zhiguo Wang and Baofeng Yang and published in the journal Engineering, the PAMRP theory argues that aging is neither fully\u2026","rel":"","context":"In "Health"","block_context":{"text":"Health","link":"https:\/\/scienceblog.com\/sciencechina\/category\/health\/"},"img":{"alt_text":"old man's hands","src":"https:\/\/i0.wp.com\/scienceblog.com\/sciencechina\/wp-content\/uploads\/sites\/16\/2025\/08\/man-8060589_1280-1.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/scienceblog.com\/sciencechina\/wp-content\/uploads\/sites\/16\/2025\/08\/man-8060589_1280-1.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/scienceblog.com\/sciencechina\/wp-content\/uploads\/sites\/16\/2025\/08\/man-8060589_1280-1.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/scienceblog.com\/sciencechina\/wp-content\/uploads\/sites\/16\/2025\/08\/man-8060589_1280-1.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":144,"url":"https:\/\/scienceblog.com\/sciencechina\/2025\/04\/30\/bacteria-use-ancient-war-trick-against-viral-invaders\/","url_meta":{"origin":346,"position":4},"title":"Bacteria Use Ancient War Trick Against Viral Invaders","author":"SciChi","date":"April 30, 2025","format":false,"excerpt":"Imagine tricking your enemy into giving you their weapons, then using those same weapons to defeat them. That's exactly what some bacteria do to fight off viral infections, according to groundbreaking research from scientists at the University of Copenhagen and Huazhong Agricultural University. The newly discovered bacterial defense system, named\u2026","rel":"","context":"In "Health"","block_context":{"text":"Health","link":"https:\/\/scienceblog.com\/sciencechina\/category\/health\/"},"img":{"alt_text":"How a modified DNA building block helps bacteria fight viruses (Left) In the Kongming defense system used by some bacteria, two proteins\u2014KomA and a viral enzyme\u2014work together to produce a special molecule called dITP. This molecule sends a signal that turns on another protein complex, KomBC, which helps stop the virus by draining the cell\u2019s supply of NAD+, a molecule essential for life. (Right) This bacterial defense shares similarities with immune systems in other organisms like plants and animals. Many of them also use small, ring-shaped or modified nucleotides (the building blocks of DNA and RNA) as signaling molecules to activate their defenses. These include variants like cADPR, ATP, and dADP, and are often linked to enzymes or receptors like TIR and RNases, which help destroy viruses or infected cells.","src":"https:\/\/i0.wp.com\/scienceblog.com\/sciencechina\/wp-content\/uploads\/sites\/16\/2025\/04\/science.ads6055-fa.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/scienceblog.com\/sciencechina\/wp-content\/uploads\/sites\/16\/2025\/04\/science.ads6055-fa.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/scienceblog.com\/sciencechina\/wp-content\/uploads\/sites\/16\/2025\/04\/science.ads6055-fa.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/scienceblog.com\/sciencechina\/wp-content\/uploads\/sites\/16\/2025\/04\/science.ads6055-fa.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":410,"url":"https:\/\/scienceblog.com\/sciencechina\/2026\/04\/01\/tiny-bubbles-can-mix-heal-and-dissolve-blood-clots\/","url_meta":{"origin":346,"position":5},"title":"Tiny Bubbles Can Mix, Heal, and Dissolve Blood Clots","author":"SciChi","date":"April 1, 2026","format":false,"excerpt":"A single bubble, roughly the width of a human hair, rises through a column of thick fluid. It is doing two things at once. As it ascends, it drags surrounding liquid upward with it, pulling material across centimeters of space in a broad, slow convection loop. And simultaneously, because a\u2026","rel":"","context":"In "Health"","block_context":{"text":"Health","link":"https:\/\/scienceblog.com\/sciencechina\/category\/health\/"},"img":{"alt_text":"Simulation of large-scale rapid mixing around acoustic bubbles.","src":"https:\/\/i0.wp.com\/scienceblog.com\/sciencechina\/wp-content\/uploads\/sites\/16\/2026\/04\/bubbles-cropped.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/scienceblog.com\/sciencechina\/wp-content\/uploads\/sites\/16\/2026\/04\/bubbles-cropped.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/scienceblog.com\/sciencechina\/wp-content\/uploads\/sites\/16\/2026\/04\/bubbles-cropped.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/scienceblog.com\/sciencechina\/wp-content\/uploads\/sites\/16\/2026\/04\/bubbles-cropped.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/scienceblog.com\/sciencechina\/wp-json\/wp\/v2\/posts\/346","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/scienceblog.com\/sciencechina\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/scienceblog.com\/sciencechina\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/scienceblog.com\/sciencechina\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/scienceblog.com\/sciencechina\/wp-json\/wp\/v2\/comments?post=346"}],"version-history":[{"count":2,"href":"https:\/\/scienceblog.com\/sciencechina\/wp-json\/wp\/v2\/posts\/346\/revisions"}],"predecessor-version":[{"id":351,"href":"https:\/\/scienceblog.com\/sciencechina\/wp-json\/wp\/v2\/posts\/346\/revisions\/351"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/scienceblog.com\/sciencechina\/wp-json\/wp\/v2\/media\/347"}],"wp:attachment":[{"href":"https:\/\/scienceblog.com\/sciencechina\/wp-json\/wp\/v2\/media?parent=346"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/scienceblog.com\/sciencechina\/wp-json\/wp\/v2\/categories?post=346"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/scienceblog.com\/sciencechina\/wp-json\/wp\/v2\/tags?post=346"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}