L. Lootens

Publications29
h-index12
Citations392
Highly Influential Citations16
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In vivo and in vitro metabolism of the synthetic cannabinoid JWH-200.
RATIONALE The synthetic cannabinoid JWH-200 (1-[2-(4-morpholinyl)ethyl]-3-(1-naphthoyl)-indole) appeared on the market around 2009. In order to identify markers for misuse of this compound and allow… Expand
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In vitro metabolism study of a black market product containing SARM LGD-4033.
Anabolic agents are often used by athletes to enhance their performance. However, use of steroids leads to considerable side effects. Non-steroidal selective androgen receptor modulators (SARMs) are… Expand
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Detection and structural investigation of metabolites of stanozolol in human urine by liquid chromatography tandem mass spectrometry
The applicability of LC-MS/MS in precursor ion scan mode for the detection of urinary stanozolol metabolites has been studied. The product ion at m/z 81 has been selected as specific for stanozolol… Expand
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Metabolic studies with promagnon, methylclostebol and methasterone in the uPA+/+-SCID chimeric mice
The chimeric uPA(+/+)-SCID mouse model, transplanted with human hepatocytes, was previously validated as an alternative tool to study in vivo the human steroid metabolism. This humanized mouse model… Expand
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In vitro and in vivo metabolisms of 1-pentyl-3-(4-methyl-1-naphthoyl)indole (JWH-122)
Abstract1-Pentyl-3-(4-methyl-1-naphthoyl)indole (JWH-122) is an agonist of the cannabinoid receptors CB1 and CB2. In this study, the phase I and phase II metabolisms of JWH-122 were investigated… Expand
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uPA+/+-SCID mouse with humanized liver as a model for in vivo metabolism of exogenous steroids: methandienone as a case study.
BACKGROUND Adequate detection of designer steroids in the urine of athletes is still a challenge in doping control analysis and requires knowledge of steroid metabolism. In this study we investigated… Expand
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Detection and Characterization of a New Metabolite of 17α-Methyltestosterone
The misuse of the anabolic steroid methyltestosterone is currently routinely monitored in doping control laboratories by gas chromatography-mass spectrometry (GC-MS) of two of its metabolites:… Expand
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Combination of liquid-chromatography tandem mass spectrometry in different scan modes with human and chimeric mouse urine for the study of steroid metabolism.
Anabolic steroids are among the most frequently detected compounds in doping analysis. They are extensively metabolized and therefore an in-depth knowledge about steroid metabolism is needed. In this… Expand
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Results of stability studies with doping agents in urine.
For a correct interpretation of analytical results in doping control, knowledge on the stability of prohibited substances in the urinary matrix is a prerequisite. So far, limited data is available on… Expand
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The uPA(+/+)-SCID Mouse with Humanized Liver as a Model for in Vivo Metabolism of 4-Androstene-3,17-dione
The metabolism in primary human hepatocyte cultures often deviates from that in clinical studies, which in turn are hampered by ethical constraints. Here the use of urokinase-type plasminogen… Expand
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