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Texas Medical Center

Cancer and Hematology
Phone: 832-824-4690


, TX

Ann M. Leen, PhD

Professor, Department of Pediatrics, Section of Hematology-Oncology, Baylor College of Medicine
Member, Dan L. Duncan Comprehensive Cancer Center, Baylor College of Medicine


School Education Degree Year
Baylor College of Medicine Other Advanced Training 2005
University of Birmingham University Doctor of Philosophy 2002


Organization Name Role
American Society of Gene Therapy (ACT) Member
International Society for Cellular Therapy (ISCT) Organizing Committee

Research Statement

Dr. Ann Leen’s research interests involve using cytotoxic T cells (CTL) for the prophylaxis and treatment of virus-associated malignancies. She is a member of the Center for Cell and Gene Therapy (CAGT).

In previous clinical trials Dr. Leen and Dr. Bollard have demonstrated that ex vivo-expanded, trivirus-specific T-cells, targeting EBV, CMV, and Adenovirus are safe and effective as prophylaxis and treatment. To extend the number of viruses which can be targeted using CTL therapy, Dr. Leen is currently analyzing the T cell immune response directed against multiple other critical viruses that are clinically important, namely RSV, parainfluenza, influenza, BK virus, HHV-6, and metapneumoviruses. Then, to shorten and simplify the production of virus-specific T-cells, Dr. Leen is evaluating the benefits of a single stimulation to amplify multivirus-specific T-cells for adoptive transfer.

She is also developing methods to allow the generation of CTL lines directed against tumor antigens expressed in lymphoma. The main focus of her attention is Survivin and SSX2, tumor antigens that are overexpressed by a large number of malignancies including Chronic Lymphocytic Leukemia and other B cell Lymphomas. The overall goal will be to develop a method, which will allow the production of tumor-specific CTL in the GMP facility that can subsequently be delivered to patients with relapsed lymphoma.

Dr. Ann Leen’s research laboratory is part of the Center for Cell and Gene Therapy at Baylor College of Medicine.

Research Interests

Viral immunology
Tumor immunology
Pediatric hematopoietic stem cell transplantation



* Texas Children's Hospital physicians' licenses and credentials are reviewed prior to practicing at any of our facilities. Sections titled From the Doctor, Professional Organizations and Publications were provided by the physician's office and were not verified by Texas Children's Hospital.