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Based on progress to date, Dr. Osborn was awarded a new grant in 2022 and 2023 to fund an additional year of this Scholar grant. Abnormal growth of B-cells can result in leukemia, and a cutting-edge treatment option is immunotherapy with T-cells. T-cells can be engineered to express a chimeric antigen receptor (CAR) that is a 'seek and destroy' molecule for the CD19 protein on B-cells. CAR T-cells are the first FDA approved gene therapy and some stunning therapeutic responses have been observed. However, the T-cell activity can be so robust that they cause a massive cytokine storm that can be lethal. Furthermore, normal and cancerous B-cells express the CD19 protein targeted by the CAR, so normal B-cell loss occurs resulting in an impaired immune system. These side effects represent a significant hurdle in the safe and effective treatment of B-cell leukemia. To address this, Dr. Osborn, will express the CAR in a specialized subset of cells called T-regulatory (Treg) cells. Tregs have the same potent killing ability as T-cells but accomplish it without healthy tissue collateral damage. Additionally, he will engineer functional B-cells that are invisible to the CAR. This will allow for normal B-cell numbers and an intact immune system. Dr. Osborn will conduct these studies that are structured to resolve an unmet need, are highly novel, and are poised to make an immediate impact on childhood leukemia. 

The 2022 portion of this grant is named for the Rays of Hope Hero Fund which honors the memory of Rayanna Marrero. She was a happy 3-year-old when she was diagnosed with Acute Lymphoblastic Leukemia (ALL). She successfully battled ALL, but a treatment induced secondary cancer claimed her life at age eight. Rayanna had an amazing attitude and loved life. She, like so many kids facing childhood cancer, did not allow it to define who she was. This Hero Fund aspires to give hope to kids fighting cancer through research.

A portion of this grant was funded by and named for the Mighty Mimi Hero Fund. Mimi Enyon was diagnosed with acute lymphoblastic leukemia at the age of 3. Her courage in the fight was unparalleled and she became “Mighty Mimi” to all those she inspired on her way to remission. This fund was established to share Mimi’s cancer journey in an effort to raise awareness and funding for childhood cancer research for kids like her.

A portion of this grant is generously supported by the Stanley Kuzmickas Feeney Fund for Pediatric Cancer Research. It was Christmas 2015 when Stanley was diagnosed with acute lymphoblastic leukemia at 13 months old. He courageously endured treatments for 3½ years. Today, he is in remission and eagerly started school in fall 2019. In his honor, Stanley’s family has organized a head-shaving event each year since July 2016 called “StoshyStrong." With the funds raised, the Feeney family created this Hero Fund to support research in new discoveries, genomics and other biological therapies for the treatment of ALL. Their goal is to one day see personalized treatments for every child.