38 research outputs found
New Insight into Brucella Infection and Foodborne Diseases
Brucellosis is an important zoonotic disease. More than half a million new cases from 100 countries are reported annually to the World Health Organization (WHO). The majority of patients are living in developing countries. Brucellosis is a systemic infection with a broad clinical spectrum, ranging from an asymptomatic disease to a severe and fatal illness. Clinical and laboratory features vary widely. The main presentations are acute febrile illness, localized infection, and chronic infection. Laboratory tools for diagnosis of brucellosis include culture, serology, and polymerase chain reaction (PCR). The goal of brucellosis therapy is to control the illness and prevent complications, relapses, and sequelae. Important principles of brucellosis treatment include use of antibiotics with activity in the acidic intracellular environment, use of combination regimens, and prolonged duration of treatment. This book is the result of several months of outstanding efforts by the authors and the revision of the content by experts in the field of brucellosis. This book is a valid resource and is intended for everyone interested in infectious disease to learn the most important aspects of brucellosis
Advances in Hydraulics and Hydroinformatics Volume 2
This Special Issue reports on recent research trends in hydraulics, hydrodynamics, and hydroinformatics, and their novel applications in practical engineering. The Issue covers a wide range of topics, including open channel flows, sediment transport dynamics, two-phase flows, flow-induced vibration and water quality. The collected papers provide insight into new developments in physical, mathematical, and numerical modelling of important problems in hydraulics and hydroinformatics, and include demonstrations of the application of such models in water resources engineering
Endothelinâ1 antagonism in glomerulonephritis
A common feature of glomerular disease is a protein leak into the urine.
Proteinuria occurs in kidney disease and is an important risk factor for
cardiovascular disease (CVD). ETâ1 is a potent vasoconstrictor/pressor peptide
that is upâregulated in CVD and many forms of inflammatory renal diseases. The
actions of ETâ1 are mediated via two Gâprotein coupled receptors, the ETAR
which serves primarily in the proâhypertensive actions of ETâ1 and is often
considered as the main pathological receptor subtype, with the ETBR serving to
clear circulating ETâ1. Antagonism of one or both of receptors has been shown
to be of clinical benefit in the treatment of hypertension. This research
demonstrated a beneficial effect of selective ETAR antagonism using Sitaxsentan
in a rat model of GN. ETAR blockade reduced blood pressure and importantly
reduced glomerular inflammation as assessed by glomerular macrophage (MÏ)
infiltration. Further, we aimed to demonstrate that MÏ, key mediators of
inflammation are activated by ETâ1 to adopt a proâinflammatoy phenotype.
However, early studies demonstrated that ETâ1 does not activate MÏ as
hypothesised. MÏ were more phagocytic, and ETâ1 was chemokinetic for
macrophages, an ETBR medicated event. ETâ1 was also removed by MÏ,
suggesting a potential regulatory role of MÏ in the ET system. This phenomenon
led to inclusion of additional in vivo studies to investigate the role of MÏ in the
regulation of ETâ1 and its pressor effects. These effects were investigated in a
murine model of MÏ ablation using CD11bâDTR mice. These experiments
determined in vivo that MÏ ablation augments pressor responses to ETâ1,
suggesting that MÏ are required to regulate ETâ1. In vitro, MÏ remove ETâ1 by
several mechanisms involving proteolytic degradation of the peptide and ETBR
mediated clearance, demonstrating a potential mechanism for the in vivo
observation. Furthermore, proteinuria is believed to be due to damage or
effacement of specialized visceral glomerular epithelial cells or podocytes. We
identified in vitro that the ETAR mediates ETâ1 induced human podocyte cell
effacement by actin cytoskeleton aberrations and slitâdiaphragm protein down-regulation,
ETâ1 and proâinflammatory cytokine production. This thesis
provides evidence to support our initial hypotheses that selective ETAR antagonism ameliorates proteinuric renal disease via its effects on podocytes
and macrophages. Continued studies both in vitro and in vivo will strengthen
the body of evidence to promote the therapeutic use of ETR antagonists in
inflammatory renal disease