Feasible diet and circadian interventions reduce in vivo progression of FLT3-ITD-positive acute myeloid leukemia.

BACKGROUND: Acute myeloid leukemia (AML) with an internal tandem duplication in the fms-like tyrosine kinase receptor 3 gene (FLT3-ITD) is associated with poor survival, and few studies have examined the impact of modifiable behaviors, such as nutrient quality and timing, in this subset of acute leukemia. METHODS: The influence of diet composition (low-sucrose and/or low-fat diets) and timing of diet were tested in tandem with anthracycline treatment in orthotopic xenograft mouse models. A pilot clinical study to test receptivity of pediatric leukemia patients to macronutrient matched foods was conducted. A role for the circadian protein, BMAL1 (brain and muscle ARNT-like 1), in effects of diet timing was studied by overexpression in FLT3-ITD-bearing AML cells. RESULTS: Reduced tumor burden in FLT3-ITD AML-bearing mice was observed with interventions utilizing low-sucrose and/or low-fat diets, or time-restricted feeding (TRF) compared to mice fed normal chow ad libitum. In a tasting study, macronutrient matched low-sucrose and low-fat meals were offered to pediatric acute leukemia patients who largely reported liking the meals. Expression of the circadian protein, BMAL1, was heightened with TRF and the low-sucrose diet. BMAL1 overexpression and treatment with a pharmacological inducer of BMAL1 was cytotoxic to FLT3-ITD AML cells. CONCLUSIONS: Mouse models for FLT3-ITD AML show that diet composition and timing slows progression of FLT3-ITD AML growth in vivo, potentially mediated by BMAL1. These interventions to enhance therapy efficacy show preliminary feasibility, as pediatric leukemia patients responded favorable to preparation of macronutrient matched meals.

Bereaved Parent Perspectives on End-of-Life Conversations in Pediatric Oncology.

BACKGROUND: Professional education pertaining to end-of-life care with pediatric oncology patients is limited. Pediatric trainees learn about end-of-life conversations largely from the provider's perspective. Bereaved parents can inform the education of oncologists and the interdisciplinary team by sharing their perceptions and preferences through personal narratives. METHODS: The aim of this project was to enhance the healthcare teams' understanding of bereaved parents' end-of-life care preferences through narratives. Bereaved parents were recruited from our institution's Pediatric Supportive Care Committee membership. Parents were tasked with identifying elements of care that were of the greatest importance to them, based upon their personal experiences during their child's end-of-life care. Narratives were analyzed using standard qualitative methods. RESULTS: Parents of five patients participated, including four mothers and three fathers. Ten themes summarizing essential elements of end-of-life care were identified, including early ongoing and stepwise prognostic disclosure, honoring the child's voice, support of hope and realism, anticipatory guidance on dying, and continued contact with the bereaved. CONCLUSION: Bereaved parents emphasize the need for providers to have ongoing honest conversations that support realism and hope that can help them to best prepare for their child's end of life and to remain in contact with them after death.

Coronavirus (COVID-19): Patient experience-Administrative services on the frontline during crisis.

The COVID-19 pandemic has had a dramatic impact on care delivery among health care institutions and providers in the United States. As a categorical cancer center, MD Anderson has prioritized care for our patients based on acuity of their disease. We continue to implement measures to protect patients and employees from acquiring the infection within our facilities, and to provide acute management of cancer patients with concomitant COVID-19 infections who are considered at high risk of death. The Division of Patient Experience, formerly established in October 2016, has played an integral role in the institution's pandemic response from its inception. The team actively supported programs and processes in anticipation of the pandemic's effect on our patients and employees. We will describe how the team continues to serve in the ever-dynamic environment as we approach the expected surge in COVID-19 cases among our patient population, our employees, and in our community.

Sustained molecular response following a failed attempt of tyrosine kinase inhibitor discontinuation & the effects on growth in a child with chronic myeloid leukemia: not always a short story.

We report a patient who developed chronic myelogenous leukemia (CML) at 12 months of age. She was treated aggressively with stem cell transplant (SCT), interferon, donor lymphocytes and imatinib, with subsequent molecular progression. She received dasatinib, achieving a complete molecular response. Dasatinib was discontinued at 3 years but she had a molecular recurrence. Dasatinib was restarted and continued for 5 additional years with a second major molecular remission (MMR). While on dasatinib therapy she suffered growth failure and was treated with concurrent growth hormone (GH). After discontinuing dasatinib and GH, catch-up growth continues and she remains in MMR. Discontinuation of TKI therapy and the toxicity of long-term TKI therapy is discussed.

Initial experience with CMC-544 (inotuzumab ozogamicin) in pediatric patients with relapsed B-cell acute lymphoblastic leukemia.

Survival is poor in pediatric patients with relapsed or refractory acute B-cell lymphoblastic leukemia (ALL) and therapeutic options are limited. CMC-544 (inotuzumab ozogamicin) has shown significant activity in adult patients with relapsed and refractory ALL. We evaluated CMC-544 in pediatric patients with multiply relapsed ALL. Five children 4-15 years old with relapsed, CD 22 positive B-cell ALL were enrolled on a phase II non-randomized trial of CMC-544. CMC-544 was initially administered at 1.3 mg/m(2) every 3 weeks. The dose then increased to 1.8 mg/m(2) every 3 weeks. Subsequently, a weekly schedule of CMC-544 given as 0.8 mg/m(2) on day 1 followed by 0.5 mg/m(2) on days 8 and 15 was administered. All five patients had refractory relapsed B-cell ALL. Lymphoblasts for all patients highly expressed CD22. Four patients had two or more relapses before starting the study drug. One patient achieved a complete remission in the bone marrow and normal peripheral counts, and two patients achieved bone marrow morphologic remission with absolute neutrophils >1,000/µl but platelets <100,000/µl. Two patients had no response to the drug. Toxicities consisted of fever, sepsis, and liver enzyme elevation. Single agent CMC-544 given at the single dose of 1.8 mg/m(2) every 3 weeks or given as a split, weekly dose was generally well tolerated considering the inherent risks in this population of patients and showed promising activity in pediatric patients with relapsed and refractory ALL.