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Table of Contents

Inside Blood

VASCULAR BIOLOGY

In this issue of Blood, Hahm and colleagues identify the extracellular protein disulfide isomerase (PDI) as an essential regulator of the adhesiveness of the β2-integrin macrophage-1 antigen (Mac-1) on neutrophils.1  In the absence of PDI, Mac-1–dependent neutrophil adhesion and crawling is reduced in vivo. Rescue experiments with exogenous PDI showed that the isomerase activity of extracellular PDI is critical for its regulatory effect on neutrophil recruitment. This intriguing finding suggests that disulfide bonds in Mac-1 regulate integrin activity and neutrophil recruitment.

INSIDE BLOOD

In this issue of Blood, Bueno and colleagues explore the developmental impact, as well as the transforming capacity, of the mixed-lineage leukemia (MLL)–AF4 fusion protein in combination with activation of FMS-like tyrosine receptor 3 (FLT3) in human embryonic stem cells (hESCs).1 

INSIDE BLOOD

In this issue of Blood, Apollonio et al report on a subset of chronic lymphocytic leukemia (CLL) characterized by molecular anergy and demonstrate how this phenotype could potentially be targeted therapeutically.1 

RED CELLS, IRON, & ERYTHROPOIESIS

In this issue of Blood, Andolfo and colleagues show that dehydrated hereditary stomatocytosis (DHSt), an inherited red cell disorder, is associated with a number of distinct germline mutations in PIEZO1, a stretch activated cation channel, in 26 affected individuals from 7 families.1 

THROMBOSIS & HEMOSTASIS

In this issue of Blood, Carcao et al demonstrate that the phenotypic variability in patients with severe hemophilia A correlates with the F8 mutation, where patients with non-null mutations exhibit a milder bleeding phenotype compared with those with null mutations, although this difference is not likely to influence the treatment decision making.1 

TRANSPLANTATION

In this issue of Blood, Boelens et al report transplantation outcomes for the largest cohort assembled to date of patients with Hurler syndrome, demonstrating key associations with survival and outlining approaches that result in higher levels of α-l-iduronidase, the enzyme missing in this devastating disorder.1 

Blood Work

Plenary Paper

Review Article

Review Series

Clinical Trials and Observations

Gene Therapy

Hematopoiesis and Stem Cells

Lymphoid Neoplasia

Myeloid Neoplasia

Phagocytes, Granulocytes, and Myelopoiesis

Platelets and Thrombopoiesis

Red Cells, Iron, and Erythropoiesis

Thrombosis and Hemostasis

Transplantation

Vascular Biology

Correspondence

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