Tufts University

About: Tufts University is a education organization based out in Medford, Massachusetts, United States. It is known for research contribution in the topics: Population & Medicine. The organization has 32800 authors who have published 66881 publications receiving 3451152 citations. The organization is also known as: Tufts College & Universitatis Tuftensis.

HIV population dynamics in vivo: implications for genetic variation, pathogenesis, and therapy

Abstract: Several recent reports indicate that the long, clinically latent phase that characterizes human immunodeficiency virus (HIV) infection of humans is not a period of viral inactivity, but an active process in which cells are being infected and dying at a high rate and in large numbers. These results lead to a simple steady-state model in which infection, cell death, and cell replacement are in balance, and imply that the unique feature of HIV is the extraordinarily large number of replication cycles that occur during infection of a single individual. This turnover drives both the pathogenic process and (even more than mutation rate) the development of genetic variation. This variation includes the inevitable and, in principle, predictable accumulation of mutations such as those conferring resistance to antiviral drugs whose presence before therapy must be considered in the design of therapeutic strategies.

Ambiguity and the process of knowledge transfer in strategic alliances

Abstract: This research examines the role played by the ‘causally ambiguous’ nature of knowledge in the process of knowledge transfer between strategic alliance partners. Based on a cross-sectional sample of 147 multinationals and a structural equation methodology, this study empirically investigates the simultaneous effects of knowledge ambiguity and its antecedents—tacitness, asset specificity, prior experience, complexity, partner protectiveness, cultural distance, and organizational distance—on technological knowledge transfer. In contrast to past research that generally assumed a direct relation between these explanatory variables and transfer outcomes, this study’s findings highlight the critical role played by knowledge ambiguity as a full mediator of tacitness, prior experience, complexity, cultural distance, and organizational distance on knowledge transfer. These significant effects are further found to be moderated by the firm’s level of collaborative know-how, its learning capacity, and the duration of the alliance. Copyright © 1999 John Wiley & Sons, Ltd.

Practice Guidelines for the Diagnosis and Management of Skin and Soft-Tissue Infections

Abstract: EXECUTIVE SUMMARYSoft-tissue infections are common, generally of mild tomodest severity, and are easily treated with a variety ofagents. An etiologic diagnosis of simple cellulitis is fre-quently difficult and generally unnecessary for patientswith mild signs and symptoms of illness. Clinical as-sessment of the severity of infection is crucial, and sev-eral classification schemes and algorithms have beenproposed to guide the clinician [1]. However, mostclinical assessments have been developed from eitherretrospective studies or from an author’s own “clinicalexperience,” illustrating the need for prospectivestudieswith defined measurements of severity coupled to man-agement issues and outcomes.Until then, it is the recommendation of this com-mittee that patients with soft-tissue infection accom-panied by signs and symptoms of systemic toxicity (e.g.,fever or hypothermia, tachycardia [heart rate,

Transplantation of ex vivo expanded endothelial progenitor cells for therapeutic neovascularization.

Abstract: Animal studies and preliminary results in humans suggest that lower extremity and myocardial ischemia can be attenuated by treatment with angiogenic cytokines. The resident population of endothelial cells that is competent to respond to an available level of angiogenic growth factors, however, may potentially limit the extent to which cytokine supplementation enhances tissue neovascularization. Accordingly, we transplanted human endothelial progenitor cells (hEPCs) to athymic nude mice with hindlimb ischemia. Blood flow recovery and capillary density in the ischemic hindlimb were markedly improved, and the rate of limb loss was significantly reduced. Ex vivo expanded hEPCs may thus have utility as a “supply-side” strategy for therapeutic neovascularization.