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Pept-1-mediated transport of Gly-Sar without any change in the Km. The short-term EGF treatment did not alter either the Pept-1 mRNA level or the intracellular pH 38 ; . However, the actual mechanism of increased Pept-1 functional expression remained unclear. Leptin Leptin secreted by the stomach may reach the lumen of the small intestine and, therefore, may be a regulator of intestinal functions such as absorption. Indeed, studies in rat intestine showed the presence of leptin receptors with preponderance in the jejunum 12 ; . Furthermore, in vivo perfusion studies in the rat jejunum showed that introduction of leptin into the perfusate specifically increased peptide absorption without any effect on fluxes of water, electrolytes, or glucose 12 ; . Because studies in Caco-2 cells revealed the presence of leptin receptors, these cells were used to investigate the mechanism of leptin stimulation of peptide absorption 12 ; . Within 30 min, leptin increased the transport of Gly-Sar and cephalexin a peptidelike antibiotic ; by Caco-2 cells. This increase in transport was observed when leptin was added to the apical side but not to the basolateral side of these cells. The kinetic analysis of this increased transport showed a 51% increase in the Vmax without any change in the Km, thus eliminating the modification of intrinsic activity of Pept-1 as a mechanism. Further investigation of the mechanism of leptin action showed a 60% increase in the membrane Pept-1 protein and a 50% decrease in the intracellular Pept-1 protein when this hormone was added for 30 min to the apical compartment of Caco-2 cells. These alterations were not accompanied by any change in the cellular Pept-1 mRNA level. To investigate the mechanism of leptin effect on Pept-1 protein, Caco-2 cells were pretreated with brefeldin and colchicine. The rationale for these studies has already been described in the section on insulin. It was found that the leptin stimulation of Gly-Sar transport was not prevented by brefeldin pretreatment, but it was abolished with colchicine pretreatment. Therefore, it appears that insulin and leptin share a common mechanism for stimulating dipeptide transport in Caco-2 cells, namely by increasing the trafficking of Pept-1 from intracellular pool to the apical membrane. Thyroid Hormone The above hormones initiate their action by binding with their respective receptors on the cell membrane, but there are hormones, such as triiodothyronine T3 ; , that enter the cell for initiating their action. Recently, it was reported 6 ; that pretreatment of Caco-2 cells with 100 nM T3 for 4 days resulted in significant inhibition of Gly-Sar uptake. The effect appeared to be specific, because no inhibition of transport of any other nutrients was observed. The studies of the mechanism of inhibition showed the following 6 ; : the kinetic analysis of the Gly-Sar uptake showed no change in the Km, but a near twofold decrease in the Vmax, suggesting a and erythromycin.
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Ellen M. Maathuis, Gerhard H. Visser, Joleen H. Blok Dept. of Clinical Neurophysiology, Erasmus MC Rotterdam, The Netherlands Introduction: Recordings of the maximum CMAP require sufficiently strong stimuli. To achieve this in clinical practice, the lowest stimulus intensity SI ; that produces a maximal CMAP on visual inspection is usually increased by a varying amount between 20 and 50% of the determined SI ; for final recordings.4-6 The aim of this study was to determine how large this surplus SI should be. The use of a supramaximal SI is motivated by the probabilistic response of axons to applied stimuli1-3 over an "activation range" of SI values range over which the firing probability increases from 0 to 100% ; . Starting from the SI at which the maximum CMAP can first be obtained SImax ; , SI should therefore be increased by an amount identical to the activation range of a MU certain of maximal CMAPs on every subsequent stimulus. For that reason, we aimed to determine the width of this activation range as percentage of SImax. Methods: We used stimulated single fiber EMG SFEMG ; of the first dorsal interosseus muscle in 5 healthy subjects. The ulnar nerve was stimulated percutaneously at the wrist. When visual inspection indicated that a stable single fiber potential was obtained, the number of times the MU was activated in response to 50 stimuli of constant SI was determined for a range of SI. This number was expressed as percentage of the 50 applied stimuli to obtain the firing probability of the MU. If another potential could be obtained by slight manipulation of the needle or by adjusting SI beyond the range of the first, stimulus-reponse curves were recorded for this second fiber. After two or three MU curves were obtained, the needle was shifted to a significantly different position within the muscle and the procedure was repeated. Each recording of a MU curve was followed by a registration of the so-called scan of the muscle CMAP vs. SI ; , to determine the lowest SI at which the maximum CMAP could be recorded SImax ; . The widths of the activation ranges of the recorded MUs and SImax were determined using curve-fitting procedures implemented in Matlab. Finally, for each MU activation curve the supramaximal percentage SMP ; value was determined by dividing its range width into SImax. Results: Between 4 and 7 different MU activation curves were obtained per subject total 27 ; . These curvewere mostly obtained for low to intermediate SIs SIs that generated CMAPs of 0-35% of the maximum CMAP ; . The corresponding SMP values ranged between 2.0% and 9.0%; their mean value was 4.5%. There was no statistically significant correlation between SMP and SI Spearman correlation; p 0.43 ; . Discussion & Conclusions: An important result of this study is that we have been able to isolate the contributions of single fibers in stimulated single fiber EMG of a distal muscle even at higher stimulus intensities. As far as we know, this possibility has not been reported previously. Because our results showed no systematic bias towards larger or smaller SMP with increasing SI, we consider them sufficiently representative for the highest threshold MUs. Adding 10% to SImax suffices to obtain maximal CMAPs consistently in healthy subjects. Because accurate determination of SImax may be difficult and because results in patients may be different, we recommend use of an additional safety margin of 10%. We conclude that stimulation at 120% 1.2SImax ; suffices to obtain maximal CMAPs. References : 1. Bergmans J 1970 ; . The physiology of single human nerve fibres. Vander. 2. Brown WF, Milner Brown HS 1973 ; . J Neurol Neurosurg Psychiatry. 1976 Mar; 39 3 ; : 249-57. 3. Hales JP, Lin CS, Bostock H. J Physiol. 2004 Sep 15; 559 Pt 3 ; : 953-64. 4. Kimura J. Electrodiagnosis in diseases of nerve and muscle. New York: Oxford University Press, 2001. 5. Meulstee J. Stimulatietechniek. In: Van Dijk J.G. Ed. ; EMG voor de algemeen neuroloog. Leiden: Boerhaave Cie, 2001. 6. Oh SJ. Clinical Electromyography.Baltimore: Williams & Wilkins, 1993 and exelon. Indocin colchicineThese attacks are self-limited, last between 1 to 4 days. The patients recover fully at the end of an attack and are totally normal in between these bouts. Some of the attacks may be so painful that the patient or the family seeks for medical help. Especially severe abdominal attacks may mimic acute appendicitis and therefore some patients may undergo unnecessary abdominal surgery, such as appendicitis. However some of the attacks, even in the same patient, may be mild enough to be confused with abdominal distress. This is one of the reasons why it is hard to recognize these patients. During abdominal pain, the child usually is constipated, but as the pain gets better, short lived soft stools appear. The child can have very high fever during one attack, or a mild increase in temperature, in another. The chest pain is generally unilateral. It may be so severe that the patient can not breathe deep enough. It resolves within days without residue. Usually one joint is affected at a time monoarthritis ; . It is commonly an ankle or a knee. It may be so swollen and painful that the child can not walk. In about a third of these patients there is an erythematous rash over the involved joint. Joint attacks may last somewhat longer than the other forms of attacks. It can take from 4 days to 2 weeks before it resolves completely. In some children, the sole finding of the disease may be recurrent joint pain and swelling which is misdiagnosed as acute rheumatic fever, or juvenile rheumatoid arthritis. About in 5-10% of the cases joint involvement may become chronic and cause irreversible changes. There is a characteristic rash of FMF called erysipelas-like erythema, usually observed over the lower extremities and joints. Some children may complain of leg pains which may be disturbing. Among the rarest forms of attacks are recurrent pericarditis inflammation of the outer layer of the heart ; , myositis muscle inflammation ; , meningitis and orchitis testicular inflammation ; . Some diseases characterized by vessel inflammation vasculitis ; are seen more frequently among children with FMF, such as Henoch-Schnlein's purpura and polyarteritis nodosa. The most important complication of FMF, in untreated cases is the development of amyloidosis. Amyloid is a special protein that deposits in certain organs like kidneys, gut, skin, heart and causes gradual loss of function, especially of the kidneys. It is not specific for FMF it may complicate other chronic, inflammatory diseases that are not properly treated, such as rheumatoid arthritis, juvenile chronic arthritis, or tuberculosis. Finding amyloid in the gut or kidney maybe a clue to diagnosis. Children who are receiving proper dose of colchicines see drug therapy ; are safe from the risk of developing this life-threatening complication. Is the disease the same in every child? It is not the same in every child. Moreover, the type, duration and the severity of the attacks may be different even in the same child. Is the disease in children different from the disease in adults? In general FMF in children resembles that seen in adults. However some features of the disease like arthritis joint inflammation ; and myositis are more common in childhood and their frequency decrease as the patient gets older. Orchitis is detected especially in young boys rather than adult males. The age of onset of FMF is also important. The risk of amyloidosis is higher among untreated patients with early disease onset. How is it diagnosed? There is no specific tool for the diagnosis of FMF. Generally the following approach is followed: a ; Clinical suspicion: It is possible to consider FMF only after the child experience a minimum of 3 attacks. A detailed history of the ethnic back-ground should be considered as well as relatives with similar complaints, or renal insufficiency . Also the parents should be asked to give a detailed description of the previous attacks. Medical intervention it is vital that a doctor who specializes in this area investigate concerns about adhd and metformin. The main mechanisms of action of olchicine are the prevention of phagocytosis of the protein-crystal complex by neutrophils and blocking the release of chemotactic factor. Iv dolchicine fdaZyloprim def, pharmacy knowledge, temovate for hands, levsin dose and classification of laryngoscopy views. Dexedrine ointment, terbinafine synthesis, altace 5mg side effects and ocuflox vigamox or zen palate 10003. Colchicine 0.6mg tabEffect of colchicie treatment on cells, indocin colchicine, iv colchicine fda, colchicine 0.6mg tab and proper dosage of colchicine. Colcchicine liver toxicity, colchicine iv administration, colchicine sources and colchicine in renal failure or colchicine polyploidy lecture powerpoint. Copyright © 2009 by Allcheap.tripod.com Inc.
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