Griffin P. Rodgers

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Integrin activation is required to facilitate multiple adhesion-dependent functions of neutrophils, such as chemotaxis, which is critical for inflammatory responses to injury and pathogens. However, little is known about the mechanisms that mediate integrin activation in neutrophils. We show that Radil, a novel Rap1 effector, regulates β1- and β2-integrin(More)
The nature of the cell responsible for von Hippel-Lindau (VHL) disease associated tumor formation has been controversial for decades. We demonstrate that VHL disease-associated central nervous system tumors are composed of developmentally arrested angioblasts that coexpress erythropoietin (Epo) and Epo receptor. The angioblasts are capable of(More)
BACKGROUND To determine the origin of the neoplastic cell in central nervous system (CNS) hemangioblastomas in von Hippel-Lindau disease (VHL) and its role in tumor formation and distribution, we characterized and differentiated neoplastic cells from hemangioblastomas removed from VHL patients. METHODS AND FINDINGS A total of 31 CNS hemangioblastomas from(More)
Although thalidomide has been shown to improve anemia in some patients with myelodysplastic syndromes and stimulates erythropoietin in patients with multiple myeloma, thalidomide's specific effects on gamma-globin gene expression during erythroid differentiation have not been studied. Here, we investigated the effects of thalidomide on gamma-globin gene(More)
The hydroxycarbamide (HC)-inducible small guanosine triphosphate (GTP)-binding protein, secretion-associated and RAS-related (SAR) protein has recently been shown to play a pivotal role in HBG induction and erythroid maturation by causing cell apoptosis and G1/S-phase arrest. Our preliminary analysis indicated that HC inducibility is transcriptionally(More)
Chemotaxis is fundamental to the directional migration of neutrophils toward endogenous and exogenous chemoattractants. Recent studies have demonstrated that ADF/cofilin superfamily members play important roles in reorganizing the actin cytoskeleton by disassembling actin filaments. GMFG, a novel ADF/cofilin superfamily protein that is expressed in(More)
T HE OBESITY EPIDEMIC IS NOT THE FIRST MAJOR health crisis that the United States has faced. In recent decades, progress has been made against such daunting challenges as tobacco use, infant mortality, and HIV/AIDS. However, obesity may pose the most significant challenge yet because it involves changing approaches to 2 fundamental aspects of daily life:(More)
C oncerns about adverse events, including deaths, in recent large clinical trials, both publicly and privately sponsored, prompted Elias A. discuss " Moving from Observational Studies to Clinical Trials: Why Do We Sometimes Get It Wrong? " (a detailed summary and video archive of the meeting are available at http:⁄⁄www. meetinglink.org/omar/ct/index.htm). "(More)