References of "CAVALIER, Etienne"
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See detailLe dosage de l'inuline: mise au point
DELANAYE, Pierre ULg; Souvignet, Marie; Dubourg, Laurence et al

in Annales de Biologie Clinique (2011), 69(3), 273-84

L’inuline, polymère de fructose, reste le marqueur de référence du débit de filtration glomérulaire (DFG). Popularisé par les études de Smith et Shannon, son dosage n’en demeure pas moins complexe et ... [more ▼]

L’inuline, polymère de fructose, reste le marqueur de référence du débit de filtration glomérulaire (DFG). Popularisé par les études de Smith et Shannon, son dosage n’en demeure pas moins complexe et sujet à des interférences dont celle du glucose est la plus importante. Il existe deux grands types de dosages de l’inuline : les méthodes de dosage « acide » et enzymatiques. Le dosage « acide » consiste en un dosage colorimétrique du fructose obtenu après hydrolyse de l’inuline en milieu très acide. Le dosage du fructose englobe différentes méthodes de dosage dont la plus utilisée est la réaction à l’anthrone. Toutes ces méthodes présentent des interférences au glucose. Différentes méthodes « enzymatiques » ont été décrites au cours du temps. Celles-ci apparaissent plus précises et sans doute moins sujettes aux interférences même si peu d’études comparatives sont disponibles. Plusieurs auteurs ont également développé des dosages de type CLHP. Cette méthode spécifique et précise demeure cependant moins adaptée à la routine. Ainsi, si l’utilisation de l’inuline comme marqueur de référence n’est pas remise en cause, son dosage reste délicat, sujet aux interférences et à une certaine interprétation. Des études supplémentaires restent nécessaires pour valider analytiquement et comparativement les techniques de dosage de l’inuline. [less ▲]

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See detailSeasonal variations in vitamin D levels in melanoma patients : a single-centre prospective pilot comparative study
FAILLA, Valérie ULg; CAVALIER, Etienne ULg; EL HAYDERI, Lara ULg et al

in Journal of the European Academy of Dermatology & Venereology (2011)

Background: More than 90% of vitamin D synthesis is dependent on UV exposure. Photosensitive disorders such as lupus erythematosus, protoporphyria and xeroderma require strict sun avoidance, and vitamin D ... [more ▼]

Background: More than 90% of vitamin D synthesis is dependent on UV exposure. Photosensitive disorders such as lupus erythematosus, protoporphyria and xeroderma require strict sun avoidance, and vitamin D deficiency has been demonstrated in these patients. Melanoma patients are also instructed to avoid sun exposure and may hence be expected to be vitamin D deficient. Materials and method : Winter and summer vitamin D levels were compared in a group of melanoma patients (n=61) and age- and phototype-matched controls (n=53) without photosensitive disorders. Results : Oral supplementary vitamin D intake was reported in 32.7% of the melanoma patients and in 15.1 % in the control group. Despite oral supplementation, only 25% of the melanoma patients and the controls presented with vitamin D levels of 30 ng/mL or higher. In non-supplemented subjects in the melanoma and control groups, respectively, mean winter vitamin D levels were below the recommended threshold at 12,6 ng/mL vs 13.2 ng/mL, respectively, but not statistically different. These values increased significantly in both groups during the summer to 24.6 and 23.8 ng/mL respectively. Conclusion: Unexpected, significant increases in vitamin D levels were seen in melanoma patients during summer, suggesting non-adherence with photoprotective measures and reflecting a heliophilic behaviour. Vitamin D supplementation is recommended in melanoma patients during both winter and summer. [less ▲]

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See detailA multicentric evaluation of IDMS-traceable creatinine enzymatic assays
Pieroni, Laurence; DELANAYE, Pierre ULg; Boutten, Anne et al

in Clinica Chimica Acta (2011), 412

Chronic kidney disease definition is based on glomerular filtration rate (GFR) estimations which are derived from creatinine-based equations. The accuracy of GFR estimation is thus largely dependent of ... [more ▼]

Chronic kidney disease definition is based on glomerular filtration rate (GFR) estimations which are derived from creatinine-based equations. The accuracy of GFR estimation is thus largely dependent of those of serum creatinine assays. International recommendations highlight the need for traceable creatinine assays. The French Society of Clinical Biochemistry conducted a study for measuring accuracy of creatinine enzymatic methods. This evaluation involved 25 clinical laboratories. Creatinine was measured in serum pools ranging from 35.9±0.9 μmol/L to 174.5±3.1 μmol/L (IDMS determination) using 12 creatinine enzymatic methods. For all creatinine values greater than 74.4±1.4 μmol/L, the bias and imprecision did not exceed 5% and 5.9%, respectively. For the lowest value (35.9±0.9 μmol/L), the bias ranged from −1.8 to 9.9% (with one exception). At this level, the imprecision ranged from 1.9 to 7.8%. The true performances of the assays (couples of bias and relative standard deviation), were evaluated using Monte-Carlo simulations. Most of the assays fall within the maximum Total Error of 12% at all concentrations. This study demonstrates substantial improvements in the calibration, traceability and precision of the enzymatic methods, reaching the NKDEP recommendations. Moreover, most of these assays allowed accurate creatinine measurements for creatinine levels lower than 40 μmol/L. [less ▲]

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See detailValidation of the Abbott Architect 25(OH)-vitamin D assay
CAVALIER, Etienne ULg; CARLISI, Ignazia ULg; BEKAERT, Anne-Catherine ULg et al

in Clinical Chemistry & Laboratory Medicine (2011), 49(s1), 418

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See detail2ème BBM - ostéoporose
CAVALIER, Etienne ULg

Learning material (2011)

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See detailUrinary NGAL measurement : Biological variation and ratio to creatinine
Delanaye, Pierre ULg; Rozet, Eric ULg; Krzesinski, Jean-Marie ULg et al

in Clinica Chimica Acta (2011), 412(3-4), 390

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See detailCross-reactivity of 25-hydroxy vitamin D2 from different commercial immunoassays for 25-hydroxy vitamin D: an evaluation without spiked samples.
CAVALIER, Etienne ULg; WALLACE, A. Michael; CARLISI, Ignazia ULg et al

in Clinical chemistry and laboratory medicine : CCLM / FESCC (2011), 49(3), 555-8

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See detailAnalytical validation of the Liaison Calcitonin_II-Gen (DiaSorin)
Cavalier, Etienne ULg; Carlisi, Ignazia ULg; Bekaert, Anne-Catherine ULg et al

in Clinical Chemistry & Laboratory Medicine (2011), 49(2), 271-275

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See detailAnalyse morphoconstitutionnelle des lithiases
Gadisseur, Romy ULg; Chapelle, Jean-Paul ULg; Cavalier, Etienne ULg

Conference (2010, November 18)

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See detailWhich career perspectives for young scientists?
Cavalier, Etienne ULg

Conference (2010, November 04)

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See detailVitamine D: Besoins, Fonctions et Carence
Cavalier, Etienne ULg

Conference given outside the academic context (2010)

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See detailCurrent analytical aspects of vitamin D
Cavalier, Etienne ULg

Conference (2010, October 07)

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See detailVascular calcifications in dialysis patients
Delanaye, Pierre ULg; Cavalier, Etienne ULg

Learning material (2010)

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See detailNew technologies in allergology, Workshop
Gadisseur, Romy ULg; Chapelle, Jean-Paul ULg; Cavalier, Etienne ULg

Conference (2010, October)

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See detailAldosterone and parathyroid hormone: a complex and clinically relevant relationship
Pilz, Stefan; Tomaschitz, Andreas; März, Winfried et al

in Calcified Tissue International (2010), 87(4), 373-4

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See detailLa vitamine D: le point en 2010.
Cavalier, Etienne ULg

Conference (2010, September 17)

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See detailDosage de la 25-OH vitamine D: attention aux erreurs analytiques!
Cavalier, Etienne ULg; Carlisi, Ignazia ULg; Delanaye, Pierre ULg et al

in 27ème Congrès de la Société Française d'Endocrinologie - Deauville, 29 septembre - 2 octobre 2010 (2010, September)

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See detailLes cibles thérapeutiques pour la PTH dans les nouvelles recommandations du KDIGO: la fin d'un cauchemar?
Cavalier, Etienne ULg; Jean, G.; Delanaye, Pierre ULg et al

in Néphrologie & Thérapeutique (2010, September), 6(5), 424

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