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Mosca A, Paleari R, Madè A, Ferrero C, Locatelli M, Ceriotti F. Commutability of control materials in glycohemoglobin determinations. Clin Chem 1998; 44:632-8. [PMID: 9510872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The intermethod variabilities of control materials and patient blood samples for the measurement of glycohemoglobin were compared. Sets of 50 blood samples and 15 control materials were analyzed by HPLC and affinity and immunochemical methods. For each pair of methods, the distances of the materials from the regression line of patient blood results (expressed as normalized residuals) were calculated. Only two of 15 controls had normalized residuals exceeding 3 standard deviations from the regression line. Total hemoglobin (Hb) content, Hb derivatives, and cellulose acetate electrophoresis demonstrated that only a minority of controls could be considered similar to patients' blood samples. We selected Menarini's and our home-prepared controls to simulate calibration of the different techniques by these materials. Intermethod calibration succeeded mostly in harmonizing results obtained by HPLC methods. On the contrary, calibration of the immunochemical techniques (Boehringer and Roche) did not improve intermethod agreement to a clinically useful level.
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Mosca A, Summanen P, Finegold SM, De Michele G, Miragliotta G. Cellular fatty acid composition, soluble-protein profile, and antimicrobial resistance pattern of Eubacterium lentum. J Clin Microbiol 1998; 36:752-5. [PMID: 9508307 PMCID: PMC104620 DOI: 10.1128/jcm.36.3.752-755.1998] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Phenotypic heterogeneity among isolates of Eubacterium lentum has been recognized for many years. To better delineate their taxonomic relatedness, 29 clinical isolates of E. lentum were examined for soluble-protein content, cellular fatty acid profile, and antimicrobial resistance pattern in order to ascertain whether differences in these characteristics could be correlated with differences in biochemical activities. Among 29 isolates we could identify 6 that were different from all the others. These strains were coccobacilli with translucent colonies; they were catalase and H2S negative, not fluorescent under UV light, and susceptible to beta-lactam drugs; growth was not stimulated by arginine; and fatty acid analysis revealed the presence of straight-chain fatty acids. The remainder of the strains, including the type species, were pleomorphic bacilli with speckled colonies and were catalase and H2S positive; all but two were fluorescent under UV light; they were resistant to beta-lactam antibiotics; growth was greatly stimulated by arginine; and they demonstrated saturated branched-chain fatty acids. Our data suggest that E. lentum can be further differentiated into different types.
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Del Prete R, Picca V, Mosca A, D'Alagni M, Miragliotta G. Detection of anti-lipoarabinomannan antibodies for the diagnosis of active tuberculosis. Int J Tuberc Lung Dis 1998; 2:160-3. [PMID: 9562127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
SETTING A serological test that contributes in diagnosing tuberculosis would aid patient management. OBJECTIVE To evaluate MycoDot, a new commercially available serological test, for the detection of immunoglobulin G antibodies to lipoarabinomannan (LAM), a glycolipid common to mycobacteria. DESIGN Serum samples from 102 non-human immunodeficiency virus (HIV)-infected patients with no previous history of tuberculosis and with suspected active pulmonary (66) and/or extra-pulmonary (36) tuberculosis were investigated; 50 HIV-negative healthy subjects, sputum culture-negative, tuberculin skin test negative and with no history of tuberculosis, were used as controls. RESULTS AND CONCLUSION In 28 patients with microbiologically ascertained tuberculosis 25/28 serum samples were positive, whereas the test was negative in two patients with renal tuberculosis and in one with pulmonary tuberculosis. The remaining 74 serum samples were negative. The follow-up of these patients excluded a mycobacterial infection. Control subjects were negative. On the basis of our design, the MycoDot test, with its rapidity and degree of sensitivity, is suitable for routine use in laboratory diagnosis of both pulmonary and extrapulmonary tuberculosis.
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Del Prete R, Mosca A, D'Alagni M, Sabato R, Picca V, Miragliotta G. Detection of Mycobacterium tuberculosis DNA in blood of patients with acute pulmonary tuberculosis by polymerase chain reaction and non-isotopic hybridisation assay. J Med Microbiol 1997; 46:495-500. [PMID: 9350202 DOI: 10.1099/00222615-46-6-495] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
The detection of Mycobacterium tuberculosis DNA in peripheral blood mononuclear cells (PBMC) by PCR and non-isotopic hybridisation assay was evaluated for the laboratory diagnosis of pulmonary M. tuberculosis infection. The PCR technique was based on the presence of IS6110, a DNA sequence specific for M. tuberculosis, and performed on PBMC from 30 patients belonging to the fifth group of the American Thoracic Society (ATS) classification of tuberculosis. The identification of amplification products was confirmed after electrophoresis by hybridisation with a non-isotopic probe in a DNA enzyme immunoassay (DEIA). Of the 30 blood samples studied by the PCR-DEIA technique, 26 gave positive results and four gave negative results. Blood samples from 30 subjects in a control group were negative by this technique. The data suggest that PCR-DEIA of blood may provide a sensitive, specific and useful means of diagnosing mycobacterial infection.
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Mosca A, Paleari R, Trapolino A, Capani F, Pagano G, Plebani M. A re-evaluation of glycohaemoglobin standardisation: the Italian experience with 119 laboratories and 12 methods. EUROPEAN JOURNAL OF CLINICAL CHEMISTRY AND CLINICAL BIOCHEMISTRY : JOURNAL OF THE FORUM OF EUROPEAN CLINICAL CHEMISTRY SOCIETIES 1997; 35:243-8. [PMID: 9127749] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The effect of calibration on glycohaemoglobin results was investigated in 119 laboratories where glycohaemoglobin (HbA1c) percentages were determined in triplicate in two samples and in two calibrators. The materials were human lyophilized haemolysates home-prepared with a novel protocol. The HbA1c content was assigned to calibrators using 4 HPLC methods with the data obtained from 11 laboratories. Intra-laboratory variation was low, although in 14 out of 119 laboratories CV values greater than 3.5% were reported. Calibration decreased inter-method variation from 16.3% to 5.6%, and from 15.3% to 4.2% for samples with low and high HbA1c content, respectively. Calibration decreased overall inter-laboratory variation from 18.7% to 7.4%, and from 17.2% to 5.4%. The calibrated results obtained with all methods, including Abbott IMx and Vision, were comparable.
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Galanello R, Paleari R, Perseu L, Barella S, Maccioni L, Cao A, Mulas G, Cocco E, Mosca A. Hb Puttelange [beta 140(H19)Ala-->Val] in an Italian man with polycythemia. Hemoglobin 1997; 21:17-26. [PMID: 9028820 DOI: 10.3109/03630269708997507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Hb Puttelange [beta 140(H18)Ala-->Val] was found in a 51-year-old Italian man who had mild polycythemia. The variant eluted from ion exchange high performance liquid chromatography at a position between Hb A and Hb A2. It comprised approximately 34% of the total hemoglobin, was weakly unstable and exhibited an increased oxygen affinity. Amplification of the beta-globin exons and nucleotide sequencing revealed a heterozygosity for a GCC-->GTC mutation in codon 140 corresponding to an Ala-->Val replacement. This substitution accounts for the altered functional properties, probably by producing indirect perturbation of the 2 3-diphosphoglycerate pocket through the nearby lysine residue at beta 82(EF6).
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Mosca A, Del Prete R, D'Alagni M, Bilancia R, Miragliotta G. Evaluation of penicillin susceptibility in clinical isolates of Streptococcus pneumoniae oxacillin resistant. Eur J Epidemiol 1996; 12:643-5. [PMID: 8982626 DOI: 10.1007/bf00499465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Antibiotic resistant pneumococci have been reported from all continents. Because of the importance of pneumococci in the aetiology of life-threatening diseases, the screening for penicillin resistance with oxacillin disc on all clinically significant isolates is suggested. However, discrepancy between the determination of penicillin resistance by oxacillin disc diffusion and the determination of penicillin minimum inhibitory concentration (MIC) has been reported. On this basis we have examined seven strains of Streptococcus pneumoniae isolated from patients recovered for the exacerbation of chronic bronchitis which were oxacillin-resistant. The assay of penicillin MICs showed that three isolates were moderately resistant to this agent, while four isolates resulted sensitive to penicillin as well as to cefotaxime. These results suggest that a further evaluation of penicillin MIC should be performed on those strains of S. pneumoniae resulting oxacillin-resistant.
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Mosca A, Ghezzi A, Luzzana M, Paleari R, Imbimbo BP. Pharmacodynamic monitoring of eptastigmine in capillary blood. Eur J Clin Pharmacol 1996; 50:425-7. [PMID: 8839668 DOI: 10.1007/s002280050135] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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109
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Debernardi S, De Bellis G, Mosca A, Paleari R, Luzzana M. Characterization of Hb Camperdown [beta 104(G6)Arg-->Ser] by capillary electrophoresis and automated solid phase DNA sequencing. Hemoglobin 1996; 20:155-60. [PMID: 8811320 DOI: 10.3109/03630269609027922] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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110
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Bux P, Mosca A, Del Prete R, Miragliotta G, Chiaravalle N. [The importance of microbiological study in the therapy of odontogenic abscesses. A report of a clinical case]. MINERVA STOMATOLOGICA 1996; 45:227-30. [PMID: 8926991] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
INTRODUCTION The medical treatment (i.e. antibiotic therapy) of orofacial infections sometimes proves inadequate for the recovery of the patients. Therefore, aside the antibacterial treatment, both incision and drainage are necessary to remove the causal factors. CLINICAL CASE In our report we show that in case of failure of classic antibacterial therapy, surgical treatment alone does not allow by itself the recovery of the patient if microorganisms developed resistance to antibiotics. CONCLUSION Recent studies have demonstrated a prevalence of anaerobes in orofacial abscesses. On this basis it appears important that in the analysis of the bacterial flora the handling of samples is carried out in the proper way in order to ensure the isolation of both aerobic and anaerobic species as well as the antibiotic sensitivity.
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111
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Mosca A, Paleari R, Rosti E, Luzzana M, Barella S, Sollaino C, Galanello R. Simultaneous automated determination of glucose 6-phosphate dehydrogenase and 6-phosphogluconate dehydrogenase activities in whole blood. EUROPEAN JOURNAL OF CLINICAL CHEMISTRY AND CLINICAL BIOCHEMISTRY : JOURNAL OF THE FORUM OF EUROPEAN CLINICAL CHEMISTRY SOCIETIES 1996; 34:431-8. [PMID: 8790979 DOI: 10.1515/cclm.1996.34.5.431] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
We report a potentiometric fully automated method for determining red cell glucose 6-phosphate dehydrogenase, 6-phosphogluconate dehydrogenase activities and the glucose 6-phosphate dehydrogenase/6-phosphogluconate dehydrogenase index using 25 microliters of whole blood. No sample pre-treatment (e.g., preparation of the haemolysate) is needed and the measurements are performed at pH 8.0 and 37 degrees C under the conditions recommended by the ICSH committee. The reproducibility was constantly good, with within-run CV of 1.0% (glucose 6-phosphate dehydrogenase) and 5.9% (glucose 6-phosphate dehydrogenase/6-phosphogluconate dehydrogenase) for activities in glucose 6-phosphate dehydrogenase non-deficient adults, and of 2.3% (glucose 6-phosphate dehydrogenase, G6PD) and 2.5% (glucose 6-phosphate dehydrogenase/6-phosphogluconate dehydrogenase) for G6PDMediterranean heterozygotes. Linearity was observed up to an activity of 2800 U/l of glucose 6-phosphate dehydrogenase. Results of glucose 6-phosphate dehydrogenase activity (U/l) in whole blood (y) correlated well with those obtained with the previously described monostarter assay, performed at pH 9.2 (y = 0.60x + 37; n = 80; r = 0.991). Results of 6-phosphogluconate dehydrogenase (U/l) in whole blood (y) correlated well with those obtained by the ICSH recommended method (x) (y = 0.779x - 44; n = 23; r = 0.991). Reference intervals are reported for glucose 6-phosphate dehydrogenase, 6-phosphogluconate dehydrogenase and glucose 6-phosphate dehydrogenase/6-phosphogluconate dehydrogenase index relatively to normal, beta- and alpha-thalassaemic glucose 6-phosphate dehydrogenase non-deficient adults, to glucose 6-phosphate dehydrogenase deficient adult males and to G6PDMediterranean non-thalassaemic heterozygotes. We demonstrate that the diagnostic sensitivity of the glucose 6-phosphate dehydrogenase/6-phosphogluconate dehydrogenase index in detecting the G6PDMediterranean heterozygotes is superior to that of the glucose 6-phosphate dehydrogenase activity alone.
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112
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Mosca A, Del Prete R, Mazzotta F, Bonifazi E, Miragliotta G. Evaluation of the efficacy of josamycin in the treatment of impetigo in children and its in vitro activity on erythromycin resistant Staphylococcus aureus strains. J Chemother 1995; 7 Suppl 4:158-9. [PMID: 8904141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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113
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Mosca A, Onelli E, Rosti E, Paleari R, Luzzana M, Imbimbo BP. A patient-side technique for real-time measurement of acetylcholinesterase activity during monitoring of eptastigmine treatment. Ther Drug Monit 1995; 17:230-8. [PMID: 7624918 DOI: 10.1097/00007691-199506000-00004] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Rapid and reliable measurement of acetylcholinesterase (AChE) activity is of crucial importance to the pharmacodynamic monitoring of anticholinesterase drugs. A new assay has been developed to measure AChE from 10 microliter samples of capillary blood. AChE activity was calculated from the change in pH of the reaction medium caused by the hydrolysis of acetylcholine and measured with a highly sensitive differential pH apparatus (CL-10, Eurochem, Rome, Italy). Interference by butyrylcholinesterase was eliminated by a specific inhibitor, quinidine sulfate. The assay lasts 1 min. The coefficient of variation (CV) for replicated measurements was 2.8% (3267 U/L, n = 33). Linearity ranged from 0 to 10,000 U/L. The correlation coefficient between the new technique and Ellman's colorimetric method on washed erythrocytes was r = 0.987 (y = 1.299x - 63, n = 29). The correlation coefficient between assays on capillary and venous samples was r = 0.979 (y = 0.974x + 174, n = 47). A cross-laboratory validation study was performed in 10 centers using glycerol-stabilized hemolysates with normal and reduced AChE activity. Samples were assayed in triplicate. The within- and between-laboratory CVs for samples with normal AChE activity (6,018 U/L) were 2.2 and 8.1%, respectively. The new method was applied to a double-blind, placebo-controlled multicenter study of eptastigmine in Alzheimer patients and proved to be a simple, noninvasive, rapid, and reliable method for pharmacodynamic monitoring of this drug.
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Imbimbo BP, Licini M, Schettino M, Mosca A, Onelli E, Zecca L, Giustina A. Relationship between pharmacokinetics and pharmacodynamics of eptastigmine in young healthy volunteers. J Clin Pharmacol 1995; 35:285-90. [PMID: 7608318 DOI: 10.1002/j.1552-4604.1995.tb04060.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Eptastigmine is a long-lasting acetyl-cholinesterase inhibitor, currently being developed for the symptomatic treatment of Alzheimer's disease. In the present study, we investigated the relationship between pharmacokinetics and pharmacodynamics of eptastigmine in young healthy volunteers. Eight male subjects received single oral doses of 10, 20, and 30 mg of eptastigmine and placebo according to a double-blind, randomized, crossover design. Blood was collected before and 0.5, 1, 1.5, 2, 3, 4, 6, and 24 hours after drug administration. Cholinesterase activity was measured using a potentiometric method in both plasma (butyryl-cholinesterase) and in red blood cells (acetyl-cholinesterase). Eptastigmine plasma levels were measured by a very sensitive high-performance liquid chromatography method (limit of quantitation 0.2 ng/mL). Eptastigmine plasma concentrations increased proportionally with the dose (mean +/- SEM AUC0-24 was 0.74 +/- 0.58, 3.61 +/- 1.15, and 6.25 +/- 1.51 ng.h/mL with 10, 20, and 30 mg, respectively) and were undetectable at 24 hours. The inhibition of acetyl-cholinesterase was dose-dependent (peak inhibition was 15 +/- 2%, 30 +/- 4%, and 36 +/- 6% with 10, 20, and 30 mg, respectively) and long-lasting, with a residual inhibition of 8 to 11% at 24 hours. Acetyl-cholinesterase inhibition and drug plasma levels were related over time with a counterclockwise hysteresis curve, suggesting the formation of active metabolites and/or a slow association to and dissociation from the enzyme in red blood cells. Butyryl-cholinesterase inhibition was weak and not dose-dependent (peak inhibition was 12 +/- 4%, 13 +/- 3%, and 12 +/- 2% with 10, 20, and 30 mg, respectively). The drug was well tolerated by all subjects.(ABSTRACT TRUNCATED AT 250 WORDS)
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Mosca A, D'Alagni M, Del Prete R, De Michele GP, Summanen PH, Finegold SM, Miragliotta G. Preliminary evidence of endotoxic activity of Bilophila wadsworthia. Anaerobe 1995; 1:21-4. [PMID: 16887503 DOI: 10.1016/s1075-9964(95)80379-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/15/1994] [Indexed: 11/21/2022]
Abstract
In this study we describe two properties of the Gram-negative bacterium Bilophila wadsworthia, namely the ability to clot Limulus lysate and the capacity to induce the production of tissue factor-like procoagulant activity by human mononuclear cells in vitro. Although exhibited at a lower degree when compared with those of typical Gram-negative bacteria or Gram-negative endotoxin those activities may account in part for Bilophila's pathogenicity. The capacity indeed to induce fibrin formation through the interaction with mononuclear cells suggests one mechanism by which the microorganism might cause abscess formation in the host. Moreover, since this activity is dependent on the number of Bilophila interacting with mononuclear cells, we hypothesize that this biological activity is closely influenced by growth environment.
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117
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Paleari R, Mosca A, Maccaronio A, De Bellis G, Debernardi S, Lang F, Luzi L. Hb Agenogi [beta 90(F6)Glu-->Lys] identified by DNA analysis. Hemoglobin 1994; 18:347-51. [PMID: 7852091 DOI: 10.3109/03630269408996202] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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118
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Melis M, Petrozza V, Pulvirenti S, Eleuteri E, Mosca A, Angelini L, Carpino F. Transitional papillary cell carcinoma of the ureter: a histological and ultrastructural study. Histol Histopathol 1994; 9:287-94. [PMID: 8075488] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
We report a case of transitional papillary carcinoma of the distal left ureter. The histological and ultrastructural features were seen and compared by SEM and TEM. Observations confirm the data of literature that the deep cells of neoplasm are a normal morphological finding while the superficial cells do not have the characteristics present in normal transitional cells. In addition, SEM shows small groups or single cells with "pleomorphic microvilli" on the cell surface. These, in ureter, confirm the studies of many authors who have observed these abnormalities in carcinomas of several organs like breast, colon, liver and mesothelium.
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119
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Del Prete R, Mosca A, Locaputo S, Federico M, Angarano G, Miragliotta G. Possible significance of antibodies to Legionella pneumophila in HIV-1 infected patients with acute respiratory illness. Acta Virol 1994; 38:31-3. [PMID: 8067312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Eighty-six serum samples from 52 HIV-1 infected patients with complicating pneumonia illness were assayed for the presence of antibodies to Legionella pneumophila. In 25 of these patients Pneumocystic carinii has been previously diagnosed. Among all patients investigated only 4 had antibodies to L. pneumophila of significant titer of 128. In one patient L. pneumophila was demonstrated coexisting with P. carinii. Despite of a small proportion of patients with a significant titer of antibodies against L. pneumophila, the presence of this microorganism should be carefully investigated in AIDS patients with complicating pneumonia especially when the aetiological diagnosis is not defined; the reason is to improve the therapeutic treatment.
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120
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Debernardi S, De Bellis G, Mosca A, Paleari R, Caramenti G, Consani I, Invernizzi L, Pergolizzi R, Scodeggio M, Luzzana M. Introduction of magnetic beads in diagnosis: a simple and rapid method to detect mutations of beta globin gene, directly amplified from blood. BOLLETTINO CHIMICO FARMACEUTICO 1993; 132:478-480. [PMID: 8136120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
In this communication we present the results obtained by the use of magnetic beads in diagnosis, for the identification of genetic variants at the molecular level by sequencing, in comparison with the more laborious method of the production of ssDNA with asymmetric PCR. We compared the two techniques studying variants of beta globin gene: Hb Abruzzo [beta 143 (H21) His -> Arg] and Hb D Los Angeles [beta 121 (GH4) Glu -> Gln].
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121
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Auteri A, Mosca A, Lattuada N, Luzzana M, Zecca L, Radice D, Imbimbo BP. Pharmacodynamics and pharmacokinetics of eptastigmine in elderly subjects. Eur J Clin Pharmacol 1993; 45:373-6. [PMID: 8299673 DOI: 10.1007/bf00265958] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Eptastigmine is a new cholinesterase inhibitor, which may be potentially useful for the symptomatic treatment of Alzheimer's disease. A preliminary evaluation of its pharmacodynamic and pharmacokinetic profiles in the elderly has now been made in 6 healthy subjects (63-84 years of age) given 30 mg eptastigmine as a single oral dose. Blood was collected prior to and 1, 2, 3, 4, 6, 8, and 12 h after eptastigmine administration for measurement of cholinesterase inhibition in plasma and red blood cells and the plasma drug concentrations. The maximum plasma cholinesterase inhibition was 17%, which was reached 2.7 h after treatment. In red cells the maximum inhibition of the enzyme was 29% after 3.8 h. The estimated half-time of cholinesterase recovery was 12.4 h in plasma and 13.6 h in red blood cells. The peak plasma concentration of eptastigmine of 0.86 ng.ml-1 was reached after 1.4 h. Following absorption the drug was rapidly distributed into tissues (t1/2 alpha = 0.44 h) and then eliminated with a half-life of 12.1 h. The drug was well tolerated in all but one subject, who showed bradycardia with hypertension and nausea for about 2 h after the dose. The results indicate that oral administration of eptastigmine to elderly subjects produces long lasting inhibition of cholinesterase activity in plasma and in red blood cells.
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Miragliotta G, Mosca A, Del Prete R. The production of short-chain fatty acids by periodontopathic bacteria contributes to the impairment of local host defence. Med Hypotheses 1993; 41:462-4. [PMID: 8145659 DOI: 10.1016/0306-9877(93)90127-c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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Pepino A, Cesarelli M, Di Salle F, Mosca A, Bracale M. Preliminary notes on the conversion of three-dimensional images of bones into CAD structures for the pre-operative planning of intertrochantheric osteotomies. Med Biol Eng Comput 1993; 31:529-34. [PMID: 8295444 DOI: 10.1007/bf02441990] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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124
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Mosca A, Paleari R, Rubino FM, Zecca L, De Bellis G, Debernardi S, Baudo F, Cappellini D, Fiorelli G. Hb Abruzzo [beta 143(H21)His-->Arg] identified by mass spectrometry and DNA analysis. Hemoglobin 1993; 17:261-8. [PMID: 8330980 DOI: 10.3109/03630269308998902] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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125
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Cazzola E, Lattuada N, Zecca L, Radice D, Luzzana M, Imbimbo BP, Auteri A, Mosca A. Rapid potentiometric determination of cholinesterases in plasma and red cells: application to eptastigmine monitoring. Chem Biol Interact 1993; 87:265-8. [PMID: 8343985 DOI: 10.1016/0009-2797(93)90053-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Eptastigmine (MF 201) is a new physostigmine derivative with potent inhibitory activity on cholinesterases. Here we present a new potentiometric cholinesterase activity assay suitable for MF 201 monitoring. The analysis is performed on a differential pH system and has the following characteristics: (a) within-run precision: C.V. 2.0% (plasma cholinesterase), 1.8% (red cell cholinesterase); (b) between-run precision: C.V. 4.0% (plasma cholinesterase); (c) linearity: 1-10 kU/l (plasma cholinesterase), 6-70 U/g Hb (red cell cholinesterase); (d) comparison with a reference method (x, HITACHI 737 Boerhinger Mannheim, Italy): y = 0.785x - 0.07; n = 37; r = 0.998. The assay has been applied to the determination of plasma and red cell cholinesterase activity in volunteers over 60 years of age treated with a single oral dose of 30 mg eptastigmine. We found that red cell cholinesterase is selectively inhibited after MF 201 administration with the following kinetics (time, % of inhibition, mean +/- S.E., n = 6): 0 h, 0; 1 h, 17 +/- 4.6; 2 h, 24 +/- 4; 4 h, 23 +/- 4.4; 12 h, 14 +/- 3. Eptastigmine plasma levels were also determined by a HPLC method: maximum concentration was found one hour after drug administration.
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