Bridging the gap between clinical care and laboratory research, Stephanie Hurwitz, MD, PhD, studies the biology and transplantation of hematopoietic stem cells. Clinically, Hurwitz is a hematopathologist, which means she examines blood and tissue samples to diagnose patients with leukemia and lymphomas.
Stem cell transplantation is often the only curative option for patients with aggressive leukemias and lymphomas, yet the long-term outcomes remain poor for many patients. Hurwitz’s lab is developing strategies to strengthen each phase of the transplant process: from cell collection and engraftment to enhancing stem cell resilience.
Additionally, her team leads a multi-institutional study using AI-powered computational models based on routine clinical data to predict which donors will have enough stem cells ready for collection for transplant. This work could help doctors make better decisions to improve timing for transplant and other strategies for cell collection to improve overall transplant outcomes.
Maegan Capitano, PhD, is focused on hematopoietic stem cell transplantation for blood cancers and disorders. Hematopoietic stem cells are the cells that generate all blood cells and immune cells. Cells for transplant can be collected from a donor’s bone marrow or blood or from umbilical cord blood.
Capitano is focused on expanding hematopoietic stem cell transplantation for a broader population of patients through umbilical cord blood. It offers unique advantages: it’s often discarded but can be collected in public banks, there’s no risk to the donor, it doesn’t require as close of a match to the patient as other sources, and it carries a lower risk of complications like graft-versus-host disease.
This transplantation method was developed at IU by the late Hal Broxmeyer, PhD, the groundbreaking researcher considered the father of cord blood transplantation and therapies.
One disadvantage of umbilical cord blood is that each donation is a limited volume at collection, which often restricts its use to pediatric patients. Capitano’s lab is focused on improving the viability of cord blood stem cells to increase use in adult patients.
Once cord blood cells are removed, they encounter stress pathways. Her team is developing methods to maintain a “stem-like environment,” helping the cells retain their ability to multiply and produce different blood cells. One way her lab has found ways to reduce cellular stress and improve immune recovery after transplant is by mimicking the low-oxygen conditions of the bone marrow.
Another IU research effort is focused on improving stem cell therapies. Jim Ropa, PhD, and his lab are looking at what makes hematopoietic stem and progenitor cells function. These are the cells that can become the different types of blood cells and mature immune cells that make up the blood system. By identifying ways to improve their function, Ropa’s lab hopes to identify and predict the donor units of blood—including umbilical cord blood, bone marrow, and mobilized peripheral blood—that are the ideal units to use in these different cell therapies. These insights could lead to more effective therapies and better donor matching for stem cell transplants.
Ropa is examining how the varying oxygen levels that blood cells encounter (such as the lower oxygen in the bone marrow and higher oxygen in the bloodstream) can affect both normal and cancerous blood cells. Ropa’s research indicates that cells may use the different oxygen levels to govern changes in their function. Understanding how cells work in different oxygen tension could lead to new ways to enhance cell therapies and target treatment-resistant cancer cells.