In this week's episode we'll discuss molecular mimicry in aplastic anemia, novel experiments show that antigens associated with viral infections can mimic epitopes presented on hematopoietic progenitor cells. Then, we'll learn about prophylaxis with subcutaneous emicizumab in infants with hemophilia. Finally we'll see how hydroxyurea is associated with a significant reduction in infections among children with sickle cell anemia in Uganda.

Articles featured this week:

• Virus-reactive T cells expanded in aplastic anemia eliminate hematopoietic progenitor cells by molecular
  mimicry
• Emicizumab prophylaxis in infants with hemophilia A (HAVEN 7): primary analysis of a phase 3b open-label
  trial
• Hydroxyurea reduces infections in children with sickle cell anemia in Uganda

In this bonus episode of Blood Podcast, Associate Editor, Dr. Freda Stevenson is joined by Drs. Karin Tarte, Andrea Radtke, and Leandro Cerchietti to discuss the Review Series on the influence of the tumor microenvironment on the pathogenesis of B-cell lymphomas.

Find the full review series in Blood Journal volume 143 issue 12. 

In this week's episode we’ll discuss the findings from a study assessing the utility of free light chain mass spectrometry in AL amyloidosis, learn more about distinct single-cell RNA-sequencing signatures of bone marrow T cells of AML patients in remission after an allogeneic stem cell transplant, and discuss why von Willebrand factor clearance is critical for the protective effect of ADAMTS13 in mice with sickle cell anemia.

Articles featured in this episode: 

• Clearance of VWF by hepatic macrophages is critical for the protective effect of ADAMTS13 in sickle cell anemia mice 
• Complete responses in AL amyloidosis are unequal: the impact of free light chain mass spectrometry in AL amyloidosis
• The remission status of patients with AML post-alloSCT is associated with a distinct single-cell bone marrow T-cell signature 

In this week's episode we'll discuss eculizumab in stem cell transplant-associated thrombotic microangiopathy. Then, we'll learn about reclassifying malignant monocytosis, these newly classified cases have distinct mutational and transcriptional profiles. Finally, we'll hear about targeting the tissue factor coagulation initiation complex prevents antiphospholipid antibody development.

Articles featured in this episode:

•  A prospective multi-institutional study of eculizumab to treat high-risk stem cell transplantation–associated TMA
•  Comparing malignant monocytosis across the updated WHO and ICC classifications of 2022
•  Treatment outcomes of complement protein C5 inhibition in 509 UK patients with paroxysmal nocturnal hemoglobinuria
  
  

In this week's episode we’ll learn more about rare relapse-initiating stem cells in patients with MDS or AML in complete remission post-transplantation, discuss the role of interferon α in erythropoiesis in sickle cell disease, and learn more about how TNFα promotes clonal dominance of KIT D816V+ cells in mastocytosis.

In this week's episode we'll discuss PAR2-biased signaling in thrombo-inflammation. Then, we'll learn about how hemoglobin levels are linked to survival in transfusion-dependent beta-thalassemia. Finally we'll hear about how etoposide is better than its reputation in primary HLH—hemophagocytic lymphohistiocytosis. Symptomatic patients treated with etoposide have substantially better outcomes as compared to the historical experience.

In this week's episode we’ll discuss the findings from a prospective trial of brentuximab vedotin with dacarbazine or nivolumab in older patients with classical Hodgkin lymphoma, learn more about CD20 antigen loss as a mechanism of resistance to mosunetuzumab in relapsed/refractory B-cell lymphomas, and discuss the role of trogocytosis in red blood cell antigen loss.

In this week's episode we'll discuss CAR T cells plus ibrutinib for the treatment of relapsed/refractory mantle cell lymphoma. Next, we'll learn about a new SAGA for acute myeloid leukemia. Finally, we'll hear about new evidence that oxygen delivery to tissues can become diffusion-limited during perfusion with stored blood.

In this week's episode we’ll report on the findings from a study evaluating the long-term outcomes of pulmonary embolism in children and adolescents, discuss a new mechanism for hereditary angioedema caused by a methionine-379 to lysine substitution in kininogens, and learn more about predictors of unsustained minimal residual disease negativity in multiple myeloma patients.

In this week's episode we'll discuss extended follow-up from the ZUMA-5 trial of axicabtagene ciloleucel, or axi-cel. Then we'll learn about the role of platelets in binding and clearing senescent red blood cells. Finally, we'll hear about a new risk stratification strategy for lymphomas of the central nervous system, or CNS.