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BACKGROUND We sought to identify the frequency and mechanisms of anemia after bariatric surgery in a bariatric surgery program at the Medical College of Wisconsin, (Milwaukee, WI). Anemia after bariatric surgery has often been attributed to iron deficiency, although an inflammatory component might be present, making the anemia after surgery mechanistically(More)
BACKGROUND Vancomycin has only rarely been implicated as a cause of thrombocytopenia, and there is only limited evidence that this complication is caused by immune mechanisms. We conducted a study to determine whether thrombocytopenia is caused by vancomycin-dependent antibodies in patients being treated with vancomycin. METHODS We identified and(More)
Iron metabolism in man is a highly regulated process designed to provide iron for erythropoiesis, mitochondrial energy production, electron transport, and cell proliferation. The mechanisms of iron handling also protect cells from the deleterious effects of free iron, which can produce oxidative damage of membranes, proteins, and lipids. Over the past(More)
Bariatric surgery for morbid obesity is rapidly gaining popularity. Restrictive and/or malabsorptive surgical interventions result in dramatic weight loss with significantly decreased obesity-related morbidity and mortality. Anemia, which may affect as many as two-thirds of these patients, is of concern and generally thought to be caused by iron deficiency.(More)
Women who are not anemic but who suffer from fatigue may benefit from iron supplementation. In this issue of Blood, Krayenbühl et al provide strong evidence that women complaining of fatigue who were not anemic but who had reduced or absent iron stores were symptomatically improved after receiving parenteral iron. Given the numbers of women who are iron(More)
BACKGROUND Factor (F)VIIa-based bypassing not always provides sufficient hemostasis in hemophilia. OBJECTIVES To investigate the potential of engineered activated factor V (FVa) variants as bypassing agents in hemophilia A. METHODS Activity of FVa variants was studied in vitro using prothrombinase assays with purified components and in FV- and(More)
BACKGROUND Anemia is associated with increased morbidity and mortality in many chronic diseases. Little is known about anemia in cystic fibrosis (CF). Because the majority of patients with CF die of lung disease, the objective of this study was to identify the frequency, severity, and mechanisms of anemia in CF and to determine if there was an association(More)
Bypassing inhibitors in haemophilia patients is limited to activated (a) Factor(F)VII products. We introduced "FVa activity augmentation" as another bypassing strategy and studied effects of an engineered FVa variant designated superFVa. Procoagulant and clot stabilising properties of superFVa and recombinant human (rh)FVIIa, either alone or in combination,(More)
The desire to improve engraftment following transplantation of limited numbers of hematopoietic stem cells (HSC) has spurred the investigation of ex vivo stem cell expansion techniques. While surrogate outcomes, such as an increase in SCID-repopulating cells, suggest successful stem cell expansion in some studies, it is not clear that such assays predict(More)
Ap4A and other dinucleotides participate in the regulation of hemostasis and blood pressure control. With the exception of two previously reported surface anchored ectoAp4A-hydrolases on bovine aortic endothelial and chromaffine cells, all Ap4A-hydrolases reported are intracellular or freely soluble. We demonstrated that ectoAp4A-hydrolases are present on a(More)