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Transient Inhibition (transient + inhibition)
Selected AbstractsPhagocyte activation in preterm infants following premature rupture of the membranes or chorioamnionitisACTA PAEDIATRICA, Issue 10 2000I Nupponen Phagocyte activation was studied in 48 preterm infants, gestational age 27.3 ± 0.3 wk, birthweight 968 ± 40 g, during the first postnatal week. Human neutrophil lipocalin as a marker of neutrophil activation was measured in plasma and tracheal aspirate fractions; and lysozyme, as a marker of monocyte and macrophage activation, in plasma. The concentration of plasma human neutrophil lipocalin was 69 (46,126) ,g/l (median and quartiles), tracheal aspirate fraction fluid 213 (71,433) (,g/l and plasma lysozyme 1337 (923,1764) ,g/l. Infants born to mothers with premature rupture of the membranes or clinical chorioamnionitis (group A, n 20) had significantly higher plasma [73 (58,151) vs 53 (38,108) ,g/l; p 0.027], and tracheal aspirate fraction human neutrophil lipocalin [319 (129,540) vs 190 (57,324) ,g/l; p= 0.019], and plasma lysozyme [1739 (1356,2021) vs 1140 (739,1557) ,g/l; p 0.0001] than did infants whose mothers had intact membranes and who had no suspicion of infection (Group B, n 28). In infants born to mothers receiving corticosteroids ante partum, correlations existed between time from treatment to delivery and plasma (r 0.322, p 0.0256) and tracheal aspirate fraction human neutrophil lipocalin (r= 0.314, p 0.0096). Infants born to mothers with at risk of infection are exposed to the potentially harmful effects of activated neutrophils. Premature rupture of the membranes, even without signs of clinical infection of the mother or the fetus, is associated with phagocyte activation that may begin already in utero. Corticosteroid treatment of the mother may cause transient inhibition of neutrophil activation in the newborn. [source] Gingival and other oral manifestations in measles virus infectionJOURNAL OF CLINICAL PERIODONTOLOGY, Issue 7 2003Joseph Katz Abstract Background: Measles is a highly contagious, viral infectious disease affecting mainly children and young adults. It is characterized by high fever, maculopapular rash, keratoconjunctivitis and pathognomonic oral Koplik's spots. Methods: During an outbreak of measles among soldiers in the Israeli military, patients were referred to one medical center where they were also examined for oral signs and symptoms of their illness. Results: We present a case of measles infection with distinct oral findings. These included Koplik's spots, various forms of ulcerations of the free mucosa, -like gingivitis and pericoronitis. All oral lesions resolved after cessation of systemic illness. Conclusions: The measles virus is associated with a transient inhibition of the host response. Immunosuppression may create the necessary condition for the proliferation of pathobacteria associated with the observed pericoronitis and the other gingival lesions. Zusammenfassung Hintergrund: Masern sind eine hochgradig ansteckende virale Infektion, die vorwiegend Kinder und junge Erwachsene befällt. Sie ist charakterisiert durch hohes Fieber, makulopapulären Ausschlag, Keratokonjunktivitis und pathognomonische orale Koplik-Flecken. Zielsetzung: Beschreibung der oralen und gingivalen Manifestationen des Masern-Virus bei jungen Erwachsenen. Methoden: Während einer Masernepidemie bei Soldaten der israelischen Streitkräfte wurden die Patienten an ein Medizinisches Zentrum überwiesen, wo sie auf orale Zeichen und Symptome ihrer Erkrankung untersucht wurden. Ergebnisse: Es wird ein Fall von Masern mit speziellen oralen Symptomen gezeigt: Koplik-Flecken, verschiedene Formen von Ulzerationen der Alveolarmukosa, der NUG ähnliche Gingivitis und Pericoronitis. Alle oralen Läsionen heilten nach Ende der systemischen Erkrankung aus. Schlussfolgerungen: Eine Infektion mit dem Masern-Virus geht mit einer vorübergehenden Schwächung der Wirtsabwehr einher. Diese Immunsuppression könnte die notwendigen Bedingungen für das Wachstum von pathogenen Keimen schaffen, die mit den beobachteten Perikoronitiden und gingivalen Läsionen assoziiert waren. Résumé La rougeole est une maladie infectieuse virale très contagieuse qui affecte essentiellement les enfants et les jeunes adultes. Elle est caractérisée par la haute température, une éruption maculo-papulaire, une kérato-conjonctivite et des spots de Koplik buccaux pathognomoniques. Durant une épidémie de rougeole parmi les soldats de l'armée israélienne, des patients ont été référés vers un centre médical où ils ont également été examinés pour les signes buccaux et les symptômes de leur maladie. Un cas d'infection de rougeole avec des découvertes buccales distinctes est présenté. Elles comprennent : les spots de Koplik, des formes variées d'ulcérations de la muqueuse libre, une gingivite genre gingivite nécrotique et une péricoronarite. Toutes les lésions buccales ont disparu après la fin de la maladie systémique. Le virus de la rougeole est associéà une inhibition transitoire de la réponse immunitaire. L'immunosuppression peut créer la condition nécessaire pour la prolifération de bactéries pathogènes associées avec la péricoronarite observée ainsi que les autres lésions gingivales. [source] Effect of DOV 102,677 on the Volitional Consumption of Ethanol by Myers' High Ethanol-Preferring RatALCOHOLISM, Issue 11 2007Brian A. McMillen Background:, Inhibitors of monoamine neurotransmitter transporters are well established as antidepressants. However, the evidence that single (serotonin) or dual (serotonin,norepinephrine) neurotransmitter uptake inhibitors can treat ethanol abuse, either as a comorbidity with depression or as a separate entity, is inconsistent. Drugs that have, in addition, the ability to inhibit dopamine uptake may have an advantage in the treatment of alcohol abuse. Therefore, the inhibitor of norepinephrine, serotonin and dopamine uptake, DOV 102,677, was tested for its effects on the volitional consumption of ethanol by an ethanol-preferring rat strain. Methods:, Myers' high ethanol-preferring rats were screened by a 10-day, 3 to 30% step-up test and then given free access to the preferred concentration of ethanol in a 3-bottle choice task. Consumption of ethanol (g/kg), water, food, and body weight were measured daily during a 3-day predrug treatment period, a 3-day treatment period, and a 3-day posttreatment period. Additional Sprague,Dawley rats were observed for 24 hours for the behavioral effects of 2.0 mg/kg s.c. reserpine after a 30-minute pretreatment with different doses of DOV 102,677. Results:, The triple monoamine uptake inhibitor DOV 102,677 dose-dependently decreased the volitional consumption of ethanol by as much as 71.2% (20 mg/kg i.p., b.i.d.) over 3 days of administration. This effect carried over into the posttreatment period. Similarly, the proportion of ethanol to total fluids consumed declined by 66.2% (20 mg/kg s.c., b.i.d.), while food consumption and body weight were unaltered. In contrast, amperozide (2 mg/kg i.p., b.i.d.) suppressed the amount of ethanol consumed by 56%, while naltrexone (5 mg/kg i.p., b.i.d.) was without effect. DOV 102,677 (40 mg/kg s.c.) inhibited reserpine-induced akinesia and ptosis, but not hypothermia in Sprague,Dawley rats, consistent with its transient inhibition of serotonin transport, and more long-lived inhibition of norepinephrine and dopamine uptake. Conclusions:, DOV 102,677 significantly decreased the volitional consumption of ethanol with minimal alterations in the intake of food or on body weight in an ethanol-preferring rat strain, suggesting that triple reuptake inhibitors may find utility in treating alcohol abuse. [source] Stringent testing identifies highly potent and escape-proof anti-HIV short hairpin RNAsTHE JOURNAL OF GENE MEDICINE, Issue 6 2009Karin J. von Eije Abstract Background RNA interference (RNAi) is a cellular mechanism that can be induced by small interfering RNAs to mediate sequence-specific gene silencing by cleavage of the targeted mRNA. RNAi can be used as an antiviral approach to silence the human immunodeficiency virus type 1 (HIV-1) through stable expression of short hairpin RNAs (shRNAs). Previously, we used a co-transfection assay in which shRNA constructs were transfected with an HIV-1 molecular clone to identify 20 shRNA inhibitors that target highly conserved HIV-1 sequences. Methods In the present study, we selected the most potent shRNAs to formulate a combinatorial shRNA therapy and determine the best and easiest method for antiviral shRNA selection. We performed transient inhibition assays with either a luciferase reporter or HIV-1 molecular clone and also infected shRNA-expressing T cell lines with HIV-1 and monitored virus replication. The latter assay allows detection of viral escape. In addition, we also tested shRNA-expressing T cells upon challenge with increasing dosages of HIV-1, and measured the dose required to result in massive virus-induced syncytia formation in this 2-week assay. Results Extended culturing selected three highly effective shRNAs that do not allow viral replication for more than 100 days. This difference in potency was not observed in the transient co-transfection assays. The use of increased dosages of HIV-1 selected the same highly potent shRNAs as the laborious and extended escape study. Conclusions These highly potent shRNAs could be used for a clinical vector and the comparison of the developed assays might help other researchers in their search for antiviral shRNAs. Copyright © 2009 John Wiley & Sons, Ltd. [source] Inhibition of a pacemaker during nerve stimulation for regional anaesthesia,ANAESTHESIA, Issue 10 2007L. Engelhardt Summary Electromagnetic interference is an important cause of pacemaker malfunction. We describe a case in which the use of a peripheral nerve stimulator at a pulse duration of 1 ms and a current of 1.4 mA led to complete but transient inhibition of a permanent pacemaker in a 73-year-old female who had undergone a total shoulder replacement. [source] | ||||||||||