Targeted genomic integration and rearrangement using prime assembly

Live updates

1. 19d ago

   PrimeStack and Prime Assembly Advance Large DNA Integration

   Researchers have developed PrimeStack, a genome-editing platform that integrates large multigene cargos into plant genomes. By combining prime editing with the Bxb1 integrase, the tool achieves programmable insertion at genomic safe harbors. In rice, this method reaches efficiencies of up to 45 percent without creating double-strand breaks. Additionally, a new technique called prime assembly enables the site-specific integration of large DNA fragments and genomic rearrangement. These developments address the long-standing difficulty of inserting substantial genetic sequences into precise locations within complex genomes.

   Why it matters

   Traditional genome editing often struggles to insert large DNA segments without causing unintended damage. Previous efforts focused on avian retrotransposons for human cells and compact tools for bacteria. These new platforms expand capabilities to plants and larger genomic rearrangements.

   What is confirmed

   • PrimeStack combines prime editing with the Bxb1 integrase to insert multigene cargos at plant genomic safe harbors.
   • PrimeStack achieves up to 45 percent efficiency when inserting large DNA cargos into rice genomes at precise sites.
   • Prime assembly enables the site-specific integration of large DNA fragments and genomic rearrangement.

   What to watch next

   • Verification of PrimeStack efficiency in crop species beyond rice
   • Clinical or agricultural trials for prime assembly genomic rearrangements
   Sources used for this update (6)

   1. www.newshyu.com — 한양대 2026년 10월 1주차 우수논문
   2. www.newshyu.com — 한양대 2026년 10월 1주차 우수논문
   3. www.163.com — Nature | 引导组装（Prime assembly）实现大片段DNA定点整合与基因组...
   4. journals.plos.org — PrimeStack editors enable efficient and site-specific ...
   5. www.techreporterpapuanewguinea.com — Tome Biosciences Announces US Patent Issued for Integrase ...
   6. Bioengineer.org — PrimeStack: New Gene-Stacking Tool Writes Large DNA Cargos ...
   confidence 90%
2. 25d ago

   Avian R2 Retrotransposons and CRISPR Tools Advance Gene Editing

   Researchers analyzed 1,139 avian genomes and discovered 159 avian R2 retrotransposons to advance targeted genomic integration in human cells. Engineered variants of these retrotransposons reached up to 60 percent site-specific gene integration across human primary cells, expanding the resource for all-RNA-mediated genome editing. Meanwhile, scientists continue to exploit prokaryotic CRISPR-Cas systems, which defend against foreign genetic elements like plasmids and phages, for targeted genome modification. Additionally, a Cornell team developed a compact tool designed to insert larger DNA segments into specific sites within bacteria.

   Why it matters

   Previous research utilized prime editing to profile thousands of drug resistance variants in non-small-cell lung cancer models. Current efforts now focus on expanding genomic integration capabilities through newly characterized retrotransposons and compact insertion tools. These advancements aim to overcome previous limitations in delivering and integrating larger genetic payloads across different cell types.

   What is confirmed

   • Engineered variants of avian R2 retrotransposons achieved up to 60 percent site-specific gene integration across human primary cells.
   • CRISPR-Cas systems are prokaryotic immune systems that confer resistance to foreign genetic elements such as plasmids and phages.

   Still unconfirmed

   • A Cornell research team built a smaller gene-editing system designed to place large pieces of DNA at a chosen site in bacteria.

   What to watch next

   • Publication of further efficacy and safety data regarding engineered avian R2 retrotransposons in mammalian systems
   • Peer-reviewed findings detailing the Cornell team's compact DNA insertion tool in bacteria
   Sources used for this update (3)

   1. www.nature.com — Discovery and engineering of avian R2 retrotransposons for ...
   2. www.nature.com — CRISPR-Cas systems - Latest research and news | Nature
   3. www.fingerlakes1.com — Cornell team builds compact tool for inserting larger DNA ...
   confidence 95%
3. 29d ago

   Prime Editing Profiles EGFR Resistance to Lung Cancer Drugs

   Researchers utilized prime editing to map drug resistance in non-small-cell lung cancer. By evaluating 1676 single-amino-acid variants and 10 insertion variants of exon 20 across the epidermal growth factor receptor tyrosine kinase domain against drugs including afatinib, dacomitinib, and osimertinib, the study profiled approximately 90 percent of possible single-amino-acid variants in an L858R-based model. Combining this data with an exon 19 deletion-based dataset yielded a context-independent resistance profile encompassing 10,255 drug-variant combinations. This effort classified resistance and sensitivity to afatinib for approximately 86 percent of variants, to dacomitinib for approximately 74 percent, and to osimertinib for approximately 82 percent.

   Why it matters

   Resistance to tyrosine kinase inhibitors poses a significant obstacle in treating non-small-cell lung cancer. This work establishes a clinical resource and a methodological framework for evaluating variant-specific drug responses. The findings help clarify shared and context-specific resistance patterns across different activating mutations.

   What is confirmed

   • Prime editing was used to profile 1676 single-amino-acid variants and 10 insertion variants of exon 20 across the EGFR tyrosine kinase domain against afatinib, dacomitinib, and osimertinib.

   What to watch next

   • Clinical application of the EGFR variant resistance profiles
   • Further benchmarking against patient survival data and clinical annotations
   Sources used for this update (3)

   1. www.nature.com — Prime editing reveals the resistance landscape of EGFR ...
   2. www.nature.com — Medical research | Nature Medicine
   3. www.eso.org — ESO - Assembly, Integration and Testing
   confidence 100%
4. 31d ago

   FDA Approves Lirafugratinib for Advanced Cholangiocarcinoma

   The Food and Drug Administration approved lirafugratinib for patients with advanced cholangiocarcinoma carrying an FGFR2 fusion or rearrangement, providing a new targeted therapy option. Meanwhile, academic and federal research continues across genetic engineering methods. Stanford University's Calos Lab focuses on developing gene and cell therapy approaches using genetically corrected stem cells to address conditions like muscular dystrophy, utilizing site-specific integrases and extrachromosomal vectors. Separately, the United States Department of Agriculture Agricultural Research Service reported that its publication website is undergoing updates, with certain research news temporarily unavailable on the main portal.

   Why it matters

   Targeted genetic modifications and therapies span multiple biomedical and agricultural domains, ranging from oncology treatments to stem cell engineering. Regulatory approvals for fusion-driven cancers highlight ongoing clinical progress in precision medicine. At the same time, foundational laboratory efforts explore site-specific integration methods to treat hereditary conditions.

   What is confirmed

   • The FDA approved lirafugratinib for patients with advanced cholangiocarcinoma that carries an FGFR2 fusion or rearrangement.

   Still unconfirmed

   • The Calos Lab at Stanford University uses genetically-corrected stem cells as therapeutics to develop strategies to treat genetic diseases like muscular dystrophy.
   • The USDA Agricultural Research Service publication website is experiencing temporary unavailability due to ongoing website updates.

   What to watch next

   • Clinical rollout and patient outcomes following the FDA approval of lirafugratinib
   • Restoration of full publication access on the USDA Agricultural Research Service website
   • Further developments from the Calos Lab regarding stem cell therapies for muscular dystrophy
   Sources used for this update (3)

   1. web.stanford.edu — Calos Lab Research Page - Stanford University
   2. www.ars.usda.gov — Publications - Latest - USDA ARS
   3. www.mskcc.org — FDA Approves Lirafugratinib for Treating Cholangiocarcinoma ...
   confidence 100%
5. 33d ago

   Prime Editing Advances Precision Gene Modification Without Strand Breaks

   Prime editing functions as a search and replace genome editing technology that modifies living organisms by directly writing new genetic information into targeted DNA sites. The method uses a fusion protein consisting of a catalytically impaired programmable endonuclease linked to an engineered reverse transcriptase. It also employs a prime editing guide RNA to identify target sites and supply new sequences. This system achieves targeted insertions, deletions, and base conversions without requiring double strand breaks or donor DNA templates. Meanwhile, targeted gene repair specifically corrects mutations in episomes or chromosomes using synthetic oligonucleotides alongside the cell.

   Why it matters

   Traditional genome editing methods frequently rely on non-targeted delivery, handle only short DNA sequences, or demand customized approaches for individual patients. Older techniques often induce double strand breaks using tools such as CRISPR-Cas9 to force cells into integrating external DNA during the repair process. The development of search and replace editing technologies addresses these limitations by offering a more direct method for rewriting genetic code.

   What is confirmed

   • Prime editing is a search and replace genome editing technology that modifies living organisms by directly writing new genetic information into a targeted DNA site.
   • The most basic prime editor uses a fusion protein consisting of a catalytically impaired programmable endonuclease linked to an engineered reverse transcriptase.
   • Prime editing mediates targeted insertions, deletions, and base to base conversions without the need for double strand breaks or donor DNA templates.

   Still unconfirmed

   • Targeted gene repair uses synthetic oligonucleotides together with the cell to correct mutations at specific sites in an episome or chromosome.

   What to watch next

   • Publication of further biotechnology research articles in Nature detailing advances in targeted gene repair.
   • Additional updates on prime assembly technology deployment for large DNA sequence insertions.
   Sources used for this update (3)

   1. www.nature.com — Targeted gene repair - Latest research and news | Nature
   2. www.nature.com — Biotechnology | Nature
   3. en.wikipedia.org — Prime editing - Wikipedia
   confidence 90%
6. 35d ago

   Researchers Develop Prime Assembly for Large Gene Insertion

   An international research team has created prime assembly, a new gene-editing technology that inserts large DNA sequences up to 12,100 bases at specific genomic locations without cutting the DNA double strand. Professor Hwang Gue-ho of Hanyang University and Professor Daniel E. Bauer of Harvard Medical School and Boston Children's participated in the joint effort. Traditional editing methods rely on non-targeted gene delivery, edit only short DNA sequences, or require customized approaches for individual patients. Older techniques often use DNA double-strand breaks through tools like CRISPR-Cas9 to force cells to integrate external DNA during repair.

   Why it matters

   Older genome editing systems rely on third-generation CRISPR-Cas9 gene scissors that completely cleave target DNA double strands and induce the intracellular non-homologous end joining repair pathway. By scaling up prime editing to execute wider genome modifications, the new technique aims to support broader clinical applications than previous approaches were capable of handling. Researchers state that gene-editing techniques could soon allow scientists to replace entire genes and engineer complex cellular circuits, provided the systems can be delivered safely into cells.

   What is confirmed

   • Prime assembly was developed by an international joint research team including Professor Hwang Gue-ho of Hanyang University and Professor Daniel E. Bauer of Harvard Medical School and Boston Children's.
   • The technology inserts large DNA sequences of up to 12,100 bases at desired locations without cutting the DNA double strand.
   • Existing third-generation CRISPR-Cas9 gene scissors function by completely cleaving the target DNA double strand and inducing the intracellular non-homologous end joining repair pathway.

   What to watch next

   • Developments in the safe cellular delivery systems required for prime assembly
   • Further clinical application tests for replacing entire genes and engineering complex cellular circuits
   Sources used for this update (4)

   1. www.newshyu.com — HYU Professor Co-Develops Large-Scale Gene Insertion Technology, Published in Nature
   2. www.bioplayground.com — Prime Assembly: Precise Rearrangement of Large Genomic ...
   3. www.nature.com — Bigger than CRISPR? A guide to the latest genome editors
   4. dnacore.mgh.harvard.edu — MGH DNA Core - Harvard University
   confidence 100%
7. 37d ago

   Prime Assembly Expands Prime Editing for Large Genomes

   Prime assembly extends prime editing capabilities to handle larger genome rearrangements and sequences. Traditional editing methods mostly rely on non-targeted gene delivery, edit only short DNA sequences, or require customized approaches for individual patients. Older methods often use DNA double-strand breaks through tools like CRISPR-Cas9 to force cells to integrate external DNA during repair. By scaling up prime editing to execute wider genome modifications, the new technique aims to support broader clinical applications than previous approaches were capable of handling.

   Why it matters

   Gene therapy seeks to treat diseases by introducing new genes, replacing mutated DNA with functional copies, or adding therapeutic protein drugs. While base editing and prime editing excel at single-letter DNA changes, modifying hundreds or thousands of bases simultaneously remains challenging. Prime assembly addresses these limitations by pushing precision editing beyond small sequences.

   What is confirmed

   • A technique known as prime assembly expands the capabilities of prime editing, allowing larger genome rearrangements and potentially wider clinical applications.

   What to watch next

   • Clinical translation results and further peer-reviewed studies detailing prime assembly efficiency in human cells
   • Data on whether prime assembly can avoid the double-strand DNA breaks required by older CRISPR-Cas9 methods
   Sources used for this update (7)

   1. www.nature.com — Genetics - Nature
   2. www.nature.com — Prime editing goes large | Nature Medicine
   3. developmentstoday.com — Prime Assembly Extends Prime Editing to Large Genome ...
   4. www.biocloudy.com — 先导组装技术实现精准大规模DNA整合，拓展基因组编辑应用边界 - 生知...
   5. newspicks.com — 【新研究】ゲノム編集の第4世代がやってくる?プライム・アセンブリが拓く新しいゲノム医療
   6. www.nature.com — Gene therapy - Latest research and news | Nature
   7. crisprmedicinenews.com — News: CMN Weekly (25 September 2026) - Your Weekly CRISPR ...
   confidence 100%
8. 45d ago

   Boston Children's Team Develops Prime Assembly for Large DNA Insertions

   A research team led by Boston Children's Hospital has developed a gene-editing method called prime assembly. This technique allows for the precise insertion of large DNA sequences and the simultaneous correction of multiple mutations. By enabling long and targeted genomic integration and rearrangement, the method expands the capability of current gene-editing tools to handle more complex genetic modifications than previously possible.

   Why it matters

   Precise insertion of large genetic sequences is a significant challenge in genomic medicine. This development provides a mechanism to fix multiple mutations at once, which is essential for treating complex genetic disorders.

   What is confirmed

   • A team led by Boston Children's Hospital developed prime assembly for large DNA insertions.
   • Prime assembly enables the precise insertion of long DNA sequences.
   • The method can correct multiple mutations simultaneously.
   • The technique allows for targeted genomic integration and rearrangement.

   What to watch next

   • Clinical trial data demonstrating prime assembly in human patients
   • Peer-reviewed specifications on the maximum length of DNA insertions possible
   Sources used for this update (5)

   1. nature.com — Targeted genomic integration and rearrangement using prime assembly
   2. AllSci — Boston Children’s-led team develops prime assembly for large DNA insertions
   3. Harvard Medical School — New Gene-Editing Method, ‘Prime Assembly,’ Corrects Multiple Mutations at Once
   4. News-Medical — New prime assembly method enables long and precise DNA insertions
   5. nature.com — Gene editing using large insertions
   confidence 100%