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Wilby KJ Partovi N Ford JA Greanya E Yoshida EM 《Journal canadien de gastroenterologie》2012,26(4):205-210
OBJECTIVE:
To summarize and evaluate the published literature pertaining to boceprevir and telaprevir, and to provide clinicians with suggestions for use in patients with chronic hepatitis C infection.METHODS:
A standardized search strategy was performed using the MEDLINE, EMBASE, Google Scholar and International Pharmaceuticals Abstracts databases using the search terms “boceprevir”, “telaprevir”, “boceprevir and hepatitis C” and “telaprevir and hepatitis C”. A manual search of references was performed to identify articles missed by the electronic search. Studies were included in the review if they assessed either boceprevir or telaprevir in comparison with standard of care in chronic hepatitis C patients.RESULTS:
The studies identified assessed boceprevir and telaprevir in genotype-1 hepatitis C patients. In both treatment-naive and treatment-experienced patients, sustained virological response rates were achieved more often with boceprevir or telaprevir in combination with pegylated interferon and ribavirin compared with pegylated interferon and ribavirin alone. Both medications were well tolerated, with anemia presenting as the most treatment-limiting adverse effect.CONCLUSIONS:
Boceprevir and telaprevir will revolutionize the management of hepatitis C genotype 1 patients and will most likely decrease the burden of end-stage disease worldwide. However, current clinical limitations include establishing appropriate and cost-effective treatment durations, and use in special populations such as transplant patients and patients coinfected with HIV. Future research will need to clarify these clinical obstacles to clearly define the role of these agents in hepatitis C management. 相似文献6.
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Trawat Attarbaschi Julia Sacher Thomas Geiss-Granadia Nikolas Klein Nilufar Mossaheb Rupert Lanzenberger Susanne Asenbaum Robert Dudczak Siegfried Kasper Johannes Tauscher 《European neuropsychopharmacology》2007,17(2):102-107
We explored the relationship between striatal dopamine-2 (D(2)) receptor occupancy and extra-pyramidal symptoms (EPS) in bipolar patients receiving olanzapine. Seventeen patients with a DSM-IV diagnosis of bipolar disorder were treated with 5-45 mg/day olanzapine for at least 14 days. After that period, D(2) receptor occupancy was determined using Iodobenzamide (IBZM) and SPECT. EPS were assessed by the Simpson-Angus Scale (SAS) and Barnes-Akathisia Scale (BAS). We found a dose-dependent increase in occupancy: 5 mg led to 28-50%, 10 mg to 40-68%, 15 mg to 69%, 20 mg to 57-66%, 30 mg to 66% and 45 mg to 80% D(2) receptor occupancy; and a significant correlation between plasma levels and occupancy (R(2)=.55, P=.001). Similar to schizophrenic patients, bipolar patients did not exhibit EPS at D(2) occupancy levels of 28 to 80%. Although we did not find an increased vulnerability for acute EPS in bipolar patients receiving olanzapine at clinical relevant doses, this needs to be replicated with larger sample sizes. 相似文献
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Carsten A. Wagner Olivier Devuyst Soline Bourgeois Nilufar Mohebbi 《Pflügers Archiv : European journal of physiology》2009,458(1):137-156
The renal collecting system serves the fine-tuning of renal acid–base secretion. Acid-secretory type-A intercalated cells
secrete protons via a luminally expressed V-type H+-ATPase and generate new bicarbonate released by basolateral chloride/bicarbonate exchangers including the AE1 anion exchanger.
Efficient proton secretion depends both on the presence of titratable acids (mainly phosphate) and the concomitant secretion
of ammonia being titrated to ammonium. Collecting duct ammonium excretion requires the Rhesus protein RhCG as indicated by
recent KO studies. Urinary acid secretion by type-A intercalated cells is strongly regulated by various factors among them
acid–base status, angiotensin II and aldosterone, and the Calcium-sensing receptor. Moreover, urinary acidification by H+-ATPases is modulated indirectly by the activity of the epithelial sodium channel ENaC. Bicarbonate secretion is achieved
by non-type-A intercalated cells characterized by the luminal expression of the chloride/bicarbonate exchanger pendrin. Pendrin
activity is driven by H+-ATPases and may serve both bicarbonate excretion and chloride reabsorption. The activity and expression of pendrin is regulated
by different factors including acid–base status, chloride delivery, and angiotensin II and may play a role in NaCl retention
and blood pressure regulation. Finally, the relative abundance of type-A and non-type-A intercalated cells may be tightly
regulated. Dysregulation of intercalated cell function or abundance causes various syndromes of distal renal tubular acidosis
underlining the importance of these processes for acid–base homeostasis. 相似文献
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Rupert R Lanzenberger Markus Mitterhauser Christoph Spindelegger Wolfgang Wadsak Nikolas Klein Leonhard-Key Mien Alexander Holik Trawat Attarbaschi Nilufar Mossaheb Julia Sacher Thomas Geiss-Granadia Kurt Kletter Siegfried Kasper Johannes Tauscher 《Neuropsychopharmacology》2007,61(9):1081-1089
BACKGROUND: Results from studies in serotonin-1A (5-HT1A) knockout mice and previous positron emission tomography (PET) studies in humans imply a role for 5-HT1A receptors in normal state anxiety as well as in certain anxiety disorders. The objective of this study was to investigate 5-HT1A receptor binding potential (BP) in social anxiety disorder (SAD). METHODS: Using PET and [carbonyl-11C]WAY-100635, we compared a homogeneous group of 12 unmedicated, male SAD patients with 18 healthy control subjects (HC). A multivariate ANOVA with all regional BP values as dependent variables, age and four radiochemical variables as covariates was performed. RESULTS: We found a significantly lower 5-HT1A BP in several limbic and paralimbic areas but not in the hippocampus (p = .234) of SAD patients. The difference in 5-HT1A binding was most significant in the amygdala (-21.4%; p = .003). There was also a more than 20% lower 5-HT(1A) BP of SAD patients in the anterior cingulate cortex (p = .004), insula (p = .003), and dorsal raphe nuclei (p = .030). CONCLUSIONS: The lower 5-HT1A binding in the amygdala and mesiofrontal areas of SAD patients is consistent with 1) preclinical findings of elevated anxiety in 5-HT1A knockout mice, 2) a previous PET study in healthy volunteers showing an inverse correlation between 5-HT1A BP and state anxiety, and 3) another human PET study in patients with panic disorder showing reduced 5-HT1A binding, thus corroborating the potential validity of 5-HT1A receptors as targets in the treatment of human anxiety disorders. 相似文献