Real-life experience on effectiveness and safety of dupilumab in adult patients with moderate-to-severe atopic dermatitis.

Background: Dupilumab, a fully human monoclonal antibody targeting the alpha subunit of IL-4 was recently approved for the treatment of moderate-to-severe atopic dermatitis (AD) in adult patients.

Objective: To assess dupilumab effectiveness and safety in adults with moderate-to-severe AD in a real-life Italian multicentre retrospective cohort.

Methods: Adult moderate-to-severe AD patients, referring to 39 Italian centers, received dupilumab in the context of a national patient access program.

Acute juvenile pityriasis rubra pilaris: a case report after mononucleosis infection.

A 24-year-old male boy presented dermatosis which first appeared acutely after an infection at age 17. Clinical and histopathologic examinations were consistent with a diagnosis of juvenile pityriasis rubra pilaris type III. Treatment with UVB narrow-band led to complete resolution of the dermatitis within 1 year.

Acute localized exanthematous pustulosis (ALEP) caused by amoxicillin-clavulanic acid.

A 40-year-old woman was admitted to the hospital for an acute outbreak of multiple pustular lesions with an underlying erythematous base affecting cheeks and chin. These lesions were referred to as "aching". The patient had been taking amoxicillin-clavulanic acid (3 g a day) over the past three days for oral prophylaxis for dental treatment.

Age-related alteration of the adenosine/dopamine balance in the rat striatum.

An antagonistic interaction between adenosine A2A- and dopamine D2-receptors has been described. Radioligand binding experiments showed a predominant reduction in the number of D2 vs. A2A-receptors in the striatum of aged compared to young rats.

Adenosine A2A receptor stimulation enhances striatal extracellular glutamate levels in rats.

The influence of CGS 21680, an adenosine A2A receptor agonist, on striatal glutamate extracellular levels was tested in a microdialysis study in rats. CGS 21680 (10 mu M), infused intrastriatally through the microdialysis probe, greatly enhanced glutamate extracellular levels. These results show that striatal adenosine A2A receptors are involved in the regulation of striatal glutamate extracellular levels.

Simultaneous high-performance liquid chromatographic determination of adenosine and dopamine in rat striatal tissue with combined ultraviolet absorbance and electrochemical detection.

A method is described for the simultaneous determination of biogenic amines, adenosine and their metabolites in rat striatal tissue using high-performance liquid chromatography with ultraviolet spectrophotometric and electrochemical detection. Peaks in the chromatograms of striatal tissue extracts were identified by retention times and by on-line analysis of peak spectra for adenosine and its metabolites, and by comparing current ratios of the dual-electrode coulometric detector for monoamines and metabolites. The assay gives a linear response over the concentration range of 0.

Different effects of harmine on plasma concentrations of L-dopa and on cerebral dopamine metabolism in rabbits and rats.

The effects of short-term intravenous administration of harmine, a monoamine oxidase inhibitor, on the plasma concentrations of L-Dopa and on dopamine levels in the brain striata of rats and rabbits after L-Dopa administration were studied. Harmine affects the L-Dopa plasma concentrations in rabbits but not in rats: in fact in the former species the area under the concentration-time curve observed after administration of L-Dopa alone increased significantly when animals were pretreated with harmine. Dopamine striatal levels increased in concert with plasma L-Dopa concentrations after administration of L-Dopa in rats and rabbits.

Determination of thyreostatic residues in cattle plasma by high-performance liquid chromatography with ultraviolet detection.

A procedure is described for the concurrent assay of thiouracil, methylthiouracil, propylthiouracil, phenylthiouracil and methimazole in bovine plasma. In this procedure, reversed-phase high-performance liquid chromatography is performed after liquid-liquid extraction of plasma with ethyl acetate. Compounds are quantified by ultraviolet detection using a wavelength of 276 nm for thiouracil, methylthiouracil, propylthiouracil and phenylthiouracil and 258 nm for methimazole.

Activity of liposomal amphotericin B (AmBisome) against Leishmania infantum and tissue distribution in mice.

Preliminary observations have shown that AmBisome, a liposomal formulation of amphotericin B (Vestar Inc.), is effective and non-toxic in animal and human visceral leishmaniasis. The activity of multiple doses of this drug on Leishmania infantum, in BALB/c mice was investigated, and amphotericin B concentration in liver and spleen was determined.

High-performance liquid chromatography-electrochemical detection of 3-methylhistidine in human urine.

A reversed-phase high-performance liquid chromatographic method is described for the determination of 3-methylhistidine content in human urine using pre-column derivatization with phenylisothiocyanate, isocratic elution with 15 mM sodium acetate-acetonitrile (92:8, v/v) and electrochemical detection. The limit of quantitation was 0.1 pmol.

Simultaneous high-performance liquid chromatographic analysis of buspirone and its metabolite 1-(2-pyrimidinyl)-piperazine in plasma using electrochemical detection.

A selective and sensitive high-performance liquid chromatographic method with coulometric detection is described for the quantitation of buspirone and its active metabolite, 1-(2-pyrimidinyl)piperazine, in plasma samples of mice treated orally with buspirone (10 mg/kg body weight). The analytes are extracted with a carboxylic acid solid-phase extraction column before chromatography. A dual-electrode electrochemical detector is used.

Determination of cimetidine and related impurities in pharmaceutical formulations by high-performance liquid chromatography.

The analytical characteristics of cimetidine tablets were studied. A high-performance liquid chromatographic method was developed in order to assay cimetidine and its related impurities simultaneously. A reversed-phase system and diode-array detector were used.

Determination of naltrexone and 6 beta-naltrexol in plasma by high-performance liquid chromatography with coulometric detection.

A simple and reliable reversed-phase high-performance liquid chromatographic method with coulometric detection is described for the quantitation of naltrexone and its metabolite, 6 beta-naltrexol, in plasma samples of healthy volunteers who received orally 50 mg of naltrexone. The analytes and the internal standard, naloxone, are extracted with an octadecyl solid-phase extraction column before chromatography. The mobile phase is 0.

Plasma catecholamine responses during a personalized physical stress as a dynamic characterization of essential hypertension.

High performance liquid chromatography (HPLC) with electrochemical detection proves to be a reliable method for determination of plasma catecholamines (CA) to assess the possible role of the sympathetic nervous system (SNS) in essential hypertension (EH). The present investigation in a group of 15 normotensive (N) and 13 stable EH patients, homogeneous for age and duration of hypertension, was carried out without treatment in the supine position, up-right position and during a personalized bicycle exercise. Mean blood pressure, mean heart rate, plasma renin activity and plasma aldosterone were also evaluated at the various exertion phases.

High-performance liquid chromatographic determination of L-3-(3,4-dihydroxyphenyl)-2-methylalanine (alpha-methyldopa) in human urine and plasma.

A procedure is described for the determination of alpha-methyldopa (MD) [L-3-(3,4-dihydroxyphenyl)-2-methylalanine], its metabolite and catecholamines in the urine and plasma of patients undergoing MD therapy, by high-performance liquid chromatography with dual working electrode coulometric detection. An efficient sample preparation procedure is presented for the isolation of endogenous MD, its metabolite and catecholamines from plasma or urine. After deproteinization of a plasma sample with methanol containing 2% of 0.

Application of a high-performance liquid chromatography coulometric method for the estimation of mebendazole and its metabolites in human sera.

A novel, sensitive high-performance liquid chromatographic method, making use of coulometric detection, for the estimation of mebendazole and its metabolites in the sera of eight hydatidosis patients was devised. Recovery rates, precision, accuracy and sensitivity for each compound are reported and compared with those of the previously published methods.

Simultaneous measurement of L-dopa, its metabolites and carbidopa in plasma of parkinsonian patients by improved sample pretreatment and high-performance liquid chromatographic determination.

A procedure is described for the determination of L-3,4-dihydroxyphenylalanine (L-DOPA), its metabolites and carbidopa (CD) in plasma of Parkinsonian patients by high-performance liquid chromatography with dual working-electrode coulometric electrochemical detection. An efficient sample preparation scheme is presented for the isolation of L-DOPA, its metabolites and the catecholamines from the same plasma aliquot. After a simple deproteinization with methanol containing 2% of 0.

[Allergenic impurities in medicinal preparations containing aminopenicillin. I. Ampicillin sodium].

High-performance liquid chromatography (HPLC) with gradient elution has been used for the determination of degradation products in pharmaceutical preparations containing sodium ampicillin. In all preparations resulting by lyophilization process, the degradation products amount, almost exclusively constituted of allergenic polymeric substances deriving from condensation reactions, is more than 10%. On the contrary, the sodium ampicillin prepared by precipitation in non aqueous solvents, only contains the 2% of polymeric impurities.

Improved high-performance liquid chromatographic analysis with double detection system for L-dopa, its metabolites and carbidopa in plasma of parkinsonian patients under L-dopa therapy.

An analytical method is described for measuring L-3,4-dihydroxyphenylalanine (L-DOPA), 3-O-methyl-DOPA, dihydroxyphenylacetic acid, free catecholamines and the peripheral DOPA decarboxylase inhibitor, carbidopa, in plasma samples of Parkinsonian patients by using high-performance liquid chromatography. A sample preparation method is presented for the isolation of the catecholamines and L-DOPA with its metabolites. Catecholamines are extracted by weak cation exchange on small columns and subsequent adsorption on alumina.