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ThalassemiaMarch 2017Summary reviewed June 2026

What the HGB-205 Trial Found — Gene Therapy for Sickle Cell Disease

Researchers tested a gene therapy that adds a modified gene to a patient's own blood stem cells. Fifteen months after treatment, the patient had no sickle cell crises and the therapy gene made up about half of their hemoglobin.

What the trial was testing

The HGB-205 enrolled 7 patients with thalassemia. The study was sponsored by Genetix Biotherapeutics Inc. and tracked outcomes across the full group of patients who matched the trial's eligibility profile.

It was an early-stage trial — researchers are still confirming safety and getting an early look at how well the treatment works. Trials at this stage are designed to produce evidence regulators and physicians can act on — not just observations to follow up later.

What the results showed

The patient had no sickle cell crises for 15 months after gene therapy treatment.

The New England journal of medicine · 2017 · NCT02151526

These findings — that the new gene made up half the patient's hemoglobin and stopped sickle cell crises — were published in the The New England journal of medicine and represent the headline result of the study.

Researchers tracked outcomes across 7 patients enrolled in the trial. The result was consistent enough across the group that the team felt confident reporting it.

What this means for patients

For patients with thalassemia, this result changes the calculus on what to ask their care team about. Whether it changes day-to-day care depends on factors like disease subtype, prior treatments, and where the patient is in their care journey.

What you can do now

This was an early-stage study testing gene therapy in one patient with sickle cell disease. The treatment showed promise but was not yet FDA-approved at the time. A related gene therapy called Lyfgenia is now FDA-approved for sickle cell disease. Ask your doctor about approved gene therapies and whether you might be eligible.

Eligibility for the treatments mentioned above depends on specific test results and clinical history. Bring this summary, the trial name, and your most recent labs or pathology report to your next visit.

Open thalassemia trials

RecruitingInterventional study

Safety and Efficacy of Gene Modified Autologous Hematopoietic Stem Cells to Treat Transfusion-dependent Beta-thalassemia

This study will be intented to evaluate the safety, tolerability, and engraftment efficacy after myeloablative preconditioning and transplantation of autologous CD34+ hematopoietic stem cells transduced with a lentiviral vector encoding the human βA-T87Q-globin gene in patients with transfusion-dependent (TDT) β-thalassemia.

Shanghai, China
RecruitingInterventional study

Growth Evaluation, Health Promotion, and Clinical Management in Children and Adolescents With Thalassemia

There are nearly 300,000 patients with severe or intermediate thalassemia in China. Growth retardation is the most significant health issue for children and adolescents with transfusion-dependent thalassemia (TDT), placing a substantial economic burden on their families and a serious social strain on the labor force. Investigating the growth and development of these children and adolescents, and establishing targeted intervention plans, holds significant social value for public health practice. 1. To screen and identify pediatric patients with growth problems by conducting growth and development assessments in high-incidence areas of China, including physical development, endocrine function, nutritional status, brain function and lifestyle behaviors. 2. Implement the MENBS clinical interventions for pediatric patients with growth problems, concentrating on the following areas: * Monitor: Continuously monitor health-related indicators through regular follow-up. * Education: Provide health education to improve the cognition of patients and their families. * Nutrition: Assess patients' nutritional risks and develop personalized diet plans. * Behavior: Recommend appropriate exercise plans to promote physical development. * Support: Conduct home visits, offer free clinics and establish a support network. 3. Repeat growth assessment for pediatric patients with growth problems after 1-year clinical interventions. 4. Evaluate the effectiveness of MENBS interventions by comparing changes in growth and development indicators.

Tianjin, Tianjin Municipality, China