CRISPR Gene Editing Newsletter
Issue #21January 26, 20267 studies

CRISPR creates new crop from wild weeds, and base editing achieves remission in leukemia patients

This week brought major CRISPR breakthroughs spanning agriculture and medicine—from transforming weedy plants into profitable crops to achieving complete remission in cancer patients.

🌱 Scientists turn wild weeds into profitable crops using CRISPR

Researchers used CRISPR-Cas9 to domesticate field pennycress, a freeze-tolerant wild plant, creating a new oilseed crop that can grow between traditional farming seasons.

  • The team reduced seed glucosinolate content by 75% by targeting specific transcription factors, making the crop suitable for food and fuel production

  • CRISPR modifications created "double-low" canola-like seed compositions with low erucic acid and reduced fiber content while maintaining high yields

  • Knockout of the TT8 gene reduced seed dormancy and weediness, preventing the modified plants from becoming invasive in fields

Why it matters: This approach offers farmers three cash crops in two years instead of leaving land fallow, providing cover crop benefits while producing renewable fuel feedstock.

🥇 Top 1% journal 🔗 Nature plants Journal Article 🗓️ Jan 23

Key Findings

🩺 Base editing achieves 100% remission in leukemia trial

  • All 11 patients with T-cell acute lymphoblastic leukemia achieved complete morphogenic remission after 28 days of treatment with base-edited CAR-T cells

  • 82% of patients underwent stem-cell transplantation and 64% remain in remission 3 to 36 months after treatment

  • The base editing strategy engineered CAR-T cells to remain invisible to antibody drugs while maintaining their cancer-fighting ability

💡 Base editing may offer a more precise approach to engineering therapeutic immune cells than traditional gene editing methods.
🥇 Top 1% journal 🔗 Cancer discovery Journal Article 🗓️ Jan 23

🧠 CRISPR screen identifies new Alzheimer's drug targets

  • Researchers used genome-wide CRISPR screening to identify CHD1 and MAP3K7 genes as mediators of cancer immunotherapy resistance

  • Loss of these genes potentiated the transcriptional response to interferon-gamma, making cancer cells more vulnerable to tumor-reactive T cells

  • Immune checkpoint blockade was more effective in mouse models deficient in these genes, with elevated CD8+ T cell numbers and activation

💡 These genes are recurrently mutated in cancer and could serve as biomarkers to predict which patients will respond to immunotherapy.
🥈 Top 2% journal 🔗 Cell reports. Medicine Journal Article 🗓️ Jan 21

🔬 Anti-CRISPR protein reveals new genome editing insights

  • Scientists discovered that bacteriophage protein AcrIIA27 blocks CRISPR-Cas9 by binding to the guide RNA's exposed regions

  • This mechanism suggested that similar exposed regions in guide RNAs might compromise editing efficiency in general

  • Truncating these problematic regions in different editing systems significantly enhanced genome-editing efficiency in human cells

💡 Understanding how nature blocks CRISPR may lead to more efficient genome editing tools for research and therapy.
🥇 Top 1% journal 🔗 Nature structural & molecular biology Journal Article 🗓️ Jan 19

🎯 Enhanced Cas9 systems create larger gene deletions in plants

  • Researchers developed MND-Cas9 systems that produced substantially larger deletions without reducing editing efficiency in rice

  • The enhanced systems successfully knocked out microRNA genes, producing larger seeds, and modified gene regulatory regions

  • MND-Cas9v2 with DNA-binding domains achieved both higher efficiency and larger deletion sizes compared to standard Cas9

💡 These systems enable functional studies of non-coding RNAs and regulatory elements that require larger sequence disruptions.
🥈 Top 2% journal 🔗 Journal of integrative plant biology Journal Article 🗓️ Jan 22

🧬 Light-controlled CRISPR targets mitochondrial DNA mutations

  • Scientists created a near-infrared light-activated CRISPR system that can detect and edit mitochondrial DNA mutations with spatial precision

  • The system achieved a detection limit of 0.83 pM for mtDNA mutations and enabled controlled imaging in living cells and tumor-bearing mice

  • Light activation triggered DNA editing that disrupted mitochondrial function and promoted cancer cell death, resulting in effective tumor suppression

💡 Combining light control with CRISPR offers new possibilities for precisely targeting cancer cells while sparing healthy tissue.
🥉 Top 5% journal 🔗 Nano letters Journal Article 🗓️ Jan 20

🔬 CRISPR screen reveals gene networks controlling brain cell fate

  • Single-cell CRISPR screening of 44 transcription factors in human brain organoids identified new regulators of cortical development

  • ZNF219 (previously uncharacterized) repressed neural differentiation while NR2E1 and ARX had opposing roles in brain cell lineage progression

  • The study revealed conserved mechanisms of brain stem cell plasticity across primates and identified genes linked to neurodevelopmental disorders

💡 This framework could help understand how genetic mutations lead to neurodevelopmental and psychiatric disorders in humans.
🏆 Top 0.1% journal 🔗 Nature Journal Article 🗓️ Jan 21

Implications

These studies showcase CRISPR's expanding reach from creating new agricultural crops to treating cancer and understanding brain development. The convergence of precision editing, light control, and systematic screening approaches suggests we're entering an era where genetic tools can be tailored for increasingly specific applications across biology and medicine.

Studies in this issue

Primary sources used for this newsletter.

  1. Base Editing May Improve CAR T-cell Therapy
    main storyCancer discovery2026-01-23PMID 41575289
  2. Improved Cas9 gene editing tools increase multiple DNA deletions and target more sites in plants
    key findingJournal of integrative plant biology2026-01-22PMID 41566884
  3. Gene editing screens under immune pressure identify CHD1 and MAP3K7 as factors linked to cancer immunotherapy resistance
    key findingCell reports. Medicine2026-01-21PMID 41564866
  4. Developing pennycress as a new oilseed crop by combining important domestication traits using gene editing
    key findingNature plants2026-01-23PMID 41578087
  5. Understanding the Gene Networks That Control Human Brain Cell Development
    key findingNature2026-01-21PMID 41565813
  6. CRISPR screen finds NEK6 affects how endometrial cancer responds to CDK4/6 inhibitors
    key findingFrontiers in pharmacology2026-01-21PMID 41560755
  7. Highly sensitive DNA detection using a dual-blocking CRISPR system without amplification and low false signals
    key findingbioRxiv : the preprint server for biology2026-01-23PMID 41573851

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