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Current immunization guidelines recommend one dose of influenza vaccine for children aged ≥9 years and two doses for younger or vaccine-naïve children. However, children receiving chemotherapy have an attenuated immune response. We performed a prospective open-label study in children undergoing treatment for cancer at Perth Children's Hospital, Western Australia, to examine the safety and efficacy of a boosted influenza schedule.

ETV6::RUNX1 is one of the most common recurrent genomic abnormalities in acute lymphoblastic leukaemia (ALL) and is associated with a good prognosis. High expression of NTRK1, encoding tropomyosin receptor kinase A (TrkA), confers a poor prognosis in other malignancies and may contribute to therapy resistance in patients with ETV6::RUNX1 B-ALL.

Cold atmospheric plasma (CAP) is a safe and effective alternative to radiotherapy for cancer treatment. Its anticancer effects are attributed to increased intracellular reactive oxygen species (ROS). Glutathione, a key antioxidant derived from glutamine, is critical for cell proliferation. This study investigated whether CAP-induced ROS elevation results from reduced glutamine-glutathione conversion and elucidates the underlying mechanisms.

Allogeneic hematopoietic stem cell transplant (HSCT) is a proven curative therapy for children with high-risk myeloid malignancies. Disease relapse, transplant-related mortality and graft versus host disease (GvHD) are the main causes of treatment failure and death post-transplant. The optimum pretransplant conditioning regimen is yet to be defined. There is limited data regarding the use of busulfan, fludarabine and melphalan as a myeloablative conditioning regimen in children receiving HSCT for myeloid malignancies.

Rishi S. Kotecha MB ChB (Hons) MRCPCH FRACP PhD Co-Head, Leukaemia Translational Research rishi.kotecha@health.wa.gov.au Co-Head, Leukaemia

B-cell acute lymphoblastic leukemia (B-ALL) is the most common pediatric cancer. Current therapeutic regimens have improved 5-year event-free survival rates to 90%, however clinical outcomes for high-risk subgroups, such as BCR-ABL1+ B-ALL and relapsed ALL, remain poor. In addition, 16% of newly diagnosed children with ALL present with vertebral compression fractures. Moreover, 16% of children with ALL undergoing glucocorticoid therapy also experience a high incidence of vertebral fractures, indicating that bone health may be compromised by both leukemia progression and osteotoxicity of chemotherapy.

Acute lymphoblastic leukaemia (ALL) is one of the most treatable forms of paediatric cancer; however, there is a substantial burden of treatment-related toxicities (TRTs). In addition, the long-term changes in children's health-related quality of life (HRQoL) due to toxic treatments are not well understood.

Cancer cells are addicted to polyamines, polycations essential for cellular function. While dual targeting of cellular polyamine biosynthesis and polyamine uptake is under clinical investigation in solid cancers, preclinical and clinical studies into its potential in haematological malignancies are lacking. Here we investigated the preclinical efficacy of polyamine depletion in acute leukaemia.

OLIG2-expressing tumor stem cells have been shown to drive recurrence in Sonic Hedgehog (SHH)-subgroup medulloblastoma (MB) and patients urgently need specific therapies to target this tumor cell population.

Infants with KMT2A-rearranged B-cell acute lymphoblastic leukemia (ALL) have high rates of relapse and poor survival compared with children. Few new therapies have been identified over the past twenty years. The aim of this study was to identify existing anti-cancer agents that have the potential to be repurposed for the treatment of infant ALL.