Art and Science of Laboratory Medicine. Clinical laboratory and biomedical science related news, abstracts and images for medical laboratory professionals, students and other laboratory geeks.
Art and Science of Laboratory Medicine
Friday, March 29, 2013
Megakaryocytes put a foot through the door
Megakaryocytes in the hematopoietic niche extrude thin proplatelet processes or “arms” that pass through blood vessel walls, enter their lumen, and release platelets into the circulation. Precisely how proplatelet arms work their way into blood vessels is poorly understood. In this issue of Blood, Schachtner and colleagues1 show that megakaryocytes respond to extracellular matrices (ECMs) by assembling podosomes, specialized plasma membrane structures that promote cell motility and invasiveness, suggesting their potential role in proplatelet arm extension across basement membranes.