Graphite Bio Announces Presentation on Phase 1/2 CEDAR Trial of GPH101 in Sickle Cell Disease at Upcoming 63rd ASH Annual Meeting and Exposition

SOUTH SAN FRANCISCO, Calif.–(BUSINESS WIRE)–Graphite Bio, Inc. (Nasdaq: GRPH), a clinical-stage, next-generation gene editing company focused on therapies that harness targeted gene integration to treat or cure serious diseases, today announced that information about the company’s Phase 1/2 CEDAR trial of GPH101, an investigational therapy designed to directly correct the genetic mutation that causes sickle cell disease (SCD), will be presented during a poster session at the 63^rd American Society of Hematology (ASH) Annual Meeting & Exposition. The meeting will take place virtually and at the Georgia World Congress Center in Atlanta from December 11-14.

The ASH abstract is now available at www.hematology.org. Details of the Graphite Bio poster presentation are as follows:

Poster Session: 801. Gene Therapies: Poster I

Poster #1864: CEDAR Trial in Progress: A First in Human, Phase 1/2 Study of the Correction of a Single Nucleotide Mutation in Autologous HSCs (GPH101) to Convert HbS to HbA for Treating Severe SCD

Presenting Author: Julie Kanter, M.D., University of Alabama at Birmingham

Date and Time: Saturday, Dec. 11, 9 a.m.-7:30 p.m. ET

About Sickle Cell Disease (SCD)

SCD is a serious, life-threatening inherited blood disorder that affects approximately 100,000 people in the United States and millions of people around the world, making it the most prevalent monogenic disease worldwide. SCD is caused by a single mutation in the beta-globin gene that leads red blood cells to become misshapen, resulting in anemia, blood flow blockages, intense pain, increased risk of stroke and organ damage, and reduced life expectancy of approximately 20-30 years. Despite advancements in treatment and care, progressive organ damage continues to cause early mortality and severe morbidity, highlighting the need for curative therapies.

About GPH101

GPH101 is an investigational next-generation gene-edited autologous hematopoietic stem cell (HSC) therapy designed to directly correct the genetic mutation that causes sickle cell disease (SCD). GPH101 is the first investigational therapy to use a highly differentiated gene correction approach that seeks to efficiently and precisely correct the mutation in the beta-globin gene to decrease sickle hemoglobin (HbS) production and restore normal adult hemoglobin (HbA) expression, thereby potentially curing SCD.

Graphite Bio is evaluating GP101 in the CEDAR trial, an open-label, multi-center Phase 1/2 clinical trial designed to assess the safety, engraftment success, gene correction rates, total hemoglobin, as well as other clinical and exploratory endpoints and pharmacodynamics in patients with severe SCD.

About Graphite Bio

Graphite Bio is a clinical-stage, next-generation gene editing company harnessing high efficiency targeted gene integration to develop a new class of therapies to potentially cure a wide range of serious and life-threatening diseases. Graphite Bio is pioneering a precision gene editing approach that could enable a variety of applications to transform human health through its potential to achieve one of medicine’s most elusive goals: to precisely “find & replace” any gene in the genome. Graphite Bio’s platform allows it to precisely correct mutations, replace entire disease-causing genes with normal genes or insert new genes into predetermined, safe locations. The company was co-founded by academic pioneers in the fields of gene editing and gene therapy, including Maria Grazia Roncarolo, M.D., and Matthew Porteus, M.D., Ph.D.

Learn more about Graphite Bio by visiting www.graphitebio.com and following the company on LinkedIn.

Contacts

Company Contact:

Stephanie Yao

VP, Communications and Investor Relations

443-739-1423

[email protected]

Investor Relations:

Stephanie Ascher

Stern IR, Inc.

212-362-1200

[email protected]

Media Contact:

Christy Curran

Sam Brown, Inc.

615-414-8668

[email protected]