ФАРМАКОДИНАМИЧЕСКАЯ ЭКВИВАЛЕНТНОСТЬ ПРИМЕНЕНИЯ3-МЕСЯЧНОЙ И 28-ДНЕВНОЙ ФОРМЫ ДЕКАПЕПТИЛА ДЕПО МЕДЛЕННОГО ВЫСВОБОЖДЕНИЯ У ПАЦИЕНТОВ С РАСПРОСТРАНЕННЫМ РАКОМ ПРЕДСТАТЕЛЬНОЙ ЖЕЛЕЗЫ

Objective: to evaluate the pharmacodynamic equivalence of 3-month and 28-day formulations of tryptoreline, a sustained-release luteininghormone (LH)-releasing hormone analogue.Subjects and methods. The patients who had a verified diagnosis of locally advanced or metastatic prostate cancer were randomized intogroups to have either one injection of a 3-month dosage form (n = 63) or 3 injections of a 28-day formulation at 28-day intervals (n = 68).The onset rate of drug-induced castration, which was defined as a percentage of the patients achieving a plasma testosterone level of ≤0.5ng/ml, was compared on day 84 (i.e. thrice every 28 days). The plasma profiles of testosterone, LH, and tryptoreline, as well as the changesin the plasma concentration of prostate-specific antigen (PCA) from the baseline values were estimated within 3 months (from the initiationof therapy to day 91).Results. In the 3-month and 28-day groups, the onset rate of drug-induced castration was 98 and 96%, respectively (at confidenceintervals (94.2% bilaterally) in [-8.1%; 9.6%]. The median time for drug-induced castration was 18.8 and 18.5 days, respective-ly (p = 0.86; log-rank test). The ratios of the mean peak plasma concentrations to AUC91 of the two formulations for testosteroneand LH were within 0.80; 1.25 equivalence interval. By day 91, the mean PSA level was decreased by 91.0 and 91.7%, respec-tively (p = 0.73).Conclusion. The use of the two formulations during 3 months is pharmacologically equal.  Фармакодинамическая эквивалентность применения3-месячной и 28-дневной формы Декапептила депо медленного высвобождения у пациентов с распространенным раком предстательной железы

Relations between Au / Sn-W mineralizations and late hercynian granite: Preliminary results from the Schistose Domain of Galicia-Trás-os-Montes Zone, Spain

International audienceAu and W-Sn mineralization of the Schistose Domain of Galicia-Trás-os-Montes are spatially related to late hercynian granites. The Bruès (Au) and the Mina Soriana W-(Sn) deposits are studied. Both show some similarities and are assumed to form in the same tectonic and metamorphic context, on top of the granites. The role of the granite as a source for mineralizing fluids and rheological control for vein emplacement is re-adressed and discussed

Production of ice-nucleating particles (INPs) by fast-growing phytoplankton

Sea spray aerosol contains ice-nucleating particles (INPs), which affect the formation and properties of clouds. Here, we show that aerosols emitted from fast-growing marine phytoplankton produce effective immersion INPs, which nucleate at temperatures significantly warmer than the atmospheric homogeneous freezing (−38.0 ∘C) of pure water. Aerosol sampled over phytoplankton cultures grown in a Marine Aerosol Reference Tank (MART) induced nucleation and freezing at temperatures as high as −15.0 ∘C during exponential phytoplankton growth. This was observed in monospecific cultures representative of two major groups of phytoplankton, namely a cyanobacterium (Synechococcus elongatus) and a diatom (Thalassiosira weissflogii). Ice nucleation occurred at colder temperatures (−28.5 ∘C and below), which were not different from the freezing temperatures of procedural blanks, when the cultures were in the stationary or death phases of growth. Ice nucleation at warmer temperatures was associated with relatively high values of the maximum quantum yield of photosystem II (ΦPSII), an indicator of the physiological status of phytoplankton. High values of ΦPSII indicate the presence of cells with efficient photochemistry and greater potential for photosynthesis. For comparison, field measurements in the North Atlantic Ocean showed that high net growth rates of natural phytoplankton assemblages were associated with marine aerosol that acted as effective immersion INPs at relatively warm temperatures. Data were collected over 4 d at a sampling station maintained in the same water mass as the water column stabilized after deep mixing by a storm. Phytoplankton biomass and net phytoplankton growth rate (0.56 d−1) were greatest over the 24 h preceding the warmest mean ice nucleation temperature (−25.5 ∘C). Collectively, our laboratory and field observations indicate that phytoplankton physiological status is a useful predictor of effective INPs and more reliable than biomass or taxonomic affiliation. Ocean regions associated with fast phytoplankton growth, such as the North Atlantic during the annual spring bloom, may be significant sources of atmospheric INPs.</p

Automatic determination of aortic compliance based on MRI and adapted curvilinear detector

International audienc

Biomechanical study on ascending aortic aneurysms associated with quadricuspid aortic valve

International audienc

Optimal timing of coronary artery bypass grafting in hemodynamically stable patients after myocardial infarction and definition of poor prognostic factors

International audienc

Pharmacodynamic equivalence of a decapeptyl 3-month SR formulation with the 28-day SR formulation in patients with advanced prostate cancer

Aims: The objective of the study was to assess the pharmacodynamic equivalence of LHRH analogue triptorelin 3-month and 28-day SR formulations. Methods: Patients with documented locally advanced or metastatic prostate cancer were randomized to receive one injection of the 3-month formulation (n = 63) or three injections at 28-day intervals of the 28-day formulation (n = 68). Group-chemical castration rates defined as the percentage of patients reaching a testosterone plasma level ≤0.5 ng/ml were compared at D84 (i.e., 3 x 28 days). Testosterone, LH and triptorelin plasma profiles, and change from baseline in plasma PSA were assessed over 3 months (from baseline to D91). Results: Chemical castration rates were 98 and 96% in the 3-month and 28-day formulation groups, respectively, with confidence interval (two-sided 94.2% CI) of [-8.1%; 9.6%]. Median times to reach chemical castration were 18.8 and 18.5 days (p = 0.86, log rank), respectively. Ratios for mean peak plasma levels and AUC91 of the two formulations for both testosterone and LH fell within the [0.80; 1.25] equivalence interval. Mean PSA decreases from baseline at D91 were 91.0 and 91.7%, respectively (p = 0.73). Conclusion: Treatments with the two triptorelin formulations over 3 months are pharmacologically equivalent. Copyright © 2004 S. Karger AG, Basel.Articl