Precision BioSciences AASLD Update Call Summary Company Overview - **Company**: Precision BioSciences (NasdaqCM:DTIL) - **Event**: AASLD Business Update Call - **Date**: November 11, 2025 Key Points Industry and Company Focus - Precision BioSciences is focused on gene editing technologies, particularly in the treatment of chronic hepatitis B (HBV) and Duchenne muscular dystrophy (DMD) [3][59] Core Programs and Developments - **Arcus Platform**: The backbone of Precision BioSciences, now delivering results in clinical settings [4][5] - **Chronic Hepatitis B Program**: The PBGene HBV in the ELIMINATE B trial is a key focus, with promising data presented at AASLD [6][7] - **Duchenne Muscular Dystrophy Program**: The PBGene DMD program is set to start clinical trials in 2026, targeting a broad patient population [58][59] Financial Updates - Precision BioSciences raised $75 million to secure cash and operational runway through 2028, supporting ongoing clinical trials [8][59] Clinical Trial Highlights - **ELIMINATE B Trial**: - Phase I study focusing on E antigen negative patients, with a goal to identify a dosing regimen that allows stopping nucleos(t)ide analogs (NUCs) and testing for a cure [21][22] - Cohort 3 has shown promising results with a dose of 0.8 mg/kg, indicating a near-term path towards stopping NUCs [38][44] - Safety profile has been manageable, with no dose-limiting toxicities observed [24][29] Efficacy Data - **S Antigen Reduction**: - Cohort 1 (0.2 mg/kg) showed a 50% reduction in S antigen after nine months [31] - Cohort 2 (0.4 mg/kg) demonstrated sustained S antigen decline in all patients [33] - Cohort 3 (0.8 mg/kg) showed significant declines in S antigen, indicating effective viral DNA removal [34][35] Safety Profile - Adverse events were predictable and consistent with LNP-related infusion reactions, resolving within 12 hours [24][29] - No evidence of liver dysfunction was observed, with transaminase elevations being transient [28][29] Future Directions - Completion of dosing in Cohort 3 is expected by 2026, with plans to test for a cure by stopping NUCs [44][45] - The company aims to file an IND for PBGene DMD by the end of 2025 and begin clinical trials in early 2026 [58][59] Regulatory Considerations - The FDA has outlined approvable efficacy endpoints, including sustained suppression of HBV DNA and S antigen off treatment for at least six months [46][48] Off-Target Editing and Genomic Integrity - Precision BioSciences conducts extensive preclinical evaluations to ensure the specificity of their gene editing technology, with no off-target effects detected at therapeutically relevant doses [89][95] Market Context - The company is addressing a significant unmet need in the chronic hepatitis B and DMD markets, with a focus on innovative gene editing solutions [12][49] Conclusion Precision BioSciences is making significant strides in gene editing therapies for chronic hepatitis B and Duchenne muscular dystrophy, with promising clinical data and a strong financial position to support ongoing and future trials. The focus on safety and efficacy, along with regulatory alignment, positions the company well for potential breakthroughs in these challenging therapeutic areas.

Summary of Precision Biosciences Conference Call Company Overview - **Company**: Precision Biosciences - **Ticker**: DTL - **Industry**: Gene Editing and Biotechnology - **Stage**: Clinical stage in vivo gene editing company, previously preclinical until February 2025 [4][5] Core Programs and Developments 1. **PBGene HBV (Hepatitis B Program)** - Currently treating patients in three sites across five countries with data readouts expected in 2025 [5][6] - Addresses a significant unmet need with approximately 300 million people affected globally and over 5 million currently treated with nucleoside analogs [18][19] - Aims to eliminate the virus at its source by targeting cccDNA, which is crucial for chronic hepatitis B [20][21] - Phase one trial design includes multiple ascending doses to ensure safety and efficacy [25][26] - Fast track designation received from the FDA in March 2025 [28] 2. **PBGene DMD (Duchenne Muscular Dystrophy Program)** - A gene editing approach targeting the mutation affecting 60% of DMD patients, with IND or CTA filing planned for later in 2025 and data expected in 2026 [5][6][31] - Addresses a high unmet need with approximately 15,000 patients in the US and 300,000 globally [34] - Designed to provide functional muscle improvement over time, which is currently lacking in existing therapies [35][36] 3. **OTC Deficiency Program** - Partnership with ACURE focusing on severe OTC deficiency in infants, showing promising early data [6][17] Technology and Competitive Advantage - **Arcus Technology** - A novel gene editing tool with over 65 patents, distinct from CRISPR, minimizing patent disputes [7][8] - Features include a unique three-prime cut, smaller size allowing dual delivery via AAV, and simplicity with a single protein for recognition and cutting [9][11][14] - Capable of addressing a broader range of gene editing needs beyond simple edits, targeting root causes of diseases [15][16] Financial Position - **Cash Position**: $100 million as of March 2025, sufficient to fund operations into the second half of 2026 [49] - **Market Valuation**: Current market cap is lower than cash reserves, indicating potential undervaluation [57] Market Context and Investor Sentiment - The biotech sector has faced challenges due to high interest rates and inflation, leading to decreased investor interest [58] - Recent clinical data and advancements in programs are expected to attract investor attention and improve market perception [59] - The company operates with a leaner structure compared to competitors, enhancing capital efficiency [60] Key Takeaways - Precision Biosciences is positioned to address significant unmet medical needs in hepatitis B and DMD with innovative gene editing technologies - The company is advancing its clinical programs with a strong focus on safety and efficacy, supported by a solid financial foundation - There is optimism for future growth as clinical data emerges, potentially leading to increased investor interest and market valuation improvements [55][59]

Precision BioSciences (DTIL) Conference Call Summary Company Overview - **Company**: Precision BioSciences - **Focus**: Gene editing therapies, particularly for Duchenne muscular dystrophy (DMD) and chronic hepatitis B (HBV) Key Points from the Conference Call Industry and Market Context - **Duchenne Muscular Dystrophy (DMD)**: A genetic disorder leading to progressive muscle degeneration, with approximately 300,000 to 400,000 patients globally and 15,000 new cases in the U.S. annually [9] - **Current Treatment Landscape**: Existing therapies, including microdystrophins and exon skipping, have not achieved significant long-term muscle functional improvement [7][43] Core Program Updates - **PBGene DMD**: - A clinical-stage candidate aimed at providing durable muscle functional improvement for DMD patients, focusing on correcting mutations in the dystrophin gene [5][6] - The program is designed to address the highest unmet needs in DMD, with a unique mechanism that allows for the production of a near full-length dystrophin protein [20][31] - Preclinical data shows significant improvements in muscle force output in treated mice, maintaining improvements up to nine months post-treatment [22][23] Safety and Efficacy - **Safety Profile**: The use of lower doses of AAV (adeno-associated virus) is expected to enhance safety, reducing the risk associated with high doses [35][49] - **Durability of Treatment**: The ability to edit satellite cells is crucial for long-term muscle function improvement, with evidence of increased dystrophin protein expression over time [25][28][99] Regulatory Pathway - **FDA Interactions**: Precision BioSciences has had positive discussions with the FDA regarding their clinical trial design and biomarker linkage to functional improvement [59][102] - **Clinical Trial Timeline**: Targeting to file a CTA or IND by late 2025, with clinical trials expected to commence in 2026 [61][66] Financial and Operational Updates - **Resource Allocation**: The company is prioritizing its resources towards the HBV and DMD programs, pausing the PBGene 3243 mitochondrial DNA elimination program for fiscal reasons [62][64] - **Cash Runway**: The company has sufficient cash runway into the second half of 2026 to meet Phase 1 clinical requirements [68] Additional Insights - **Patient Perspective**: The potential for improved durability and better dystrophin expression is seen as a significant advancement over current therapies, which have struggled to demonstrate clinical efficacy [46][53] - **Commercial Considerations**: Screening for neutralizing antibodies will be critical, as many patients may have previously received AAV therapies, impacting eligibility for new treatments [80][83] Conclusion - Precision BioSciences is positioned to make significant advancements in the treatment of DMD and HBV, with promising preclinical data and a clear regulatory pathway. The focus on safety, efficacy, and patient needs underscores the company's commitment to addressing high unmet medical needs in these areas.