C. Guzelhan et al., INFLUENCE OF DIETARY-COMPOSITION ON THE INHIBITION OF FAT-ABSORPTION BY ORLISTAT, Journal of international medical research, 22(5), 1994, pp. 255-265
Citations number
30
Categorie Soggetti
Pharmacology & Pharmacy","Medicine, Research & Experimental
Orlistat, a potent and selective inhibitor of gastrointestinal lipases
, is designed for the treatment of obesity. The effect of orlistat on
dietary fat absorption, when it was administered with diets differing
in fibre content (high and low) and accessibility of fat (intra- and e
xtracellular fat), was investigated in 32 hospitalized healthy males,
according to an open, two-factorial study design. The subjects were ra
ndomly allocated to one of four parallel groups of equal size: A = int
racellular fat, high fibre (28 g/day); B extracellular fat, high fibre
; C = extracellular fat, low fibre (9 g/day); or D = intracellular fat
, low fibre. After a 5-day run-in period to accustom the volunteers to
the standardized diet (2500 kcal and 84 g fat per day) and to establi
sh baseline faecal fat parameters, they received 80 mg orlistat, three
times daily mid-way through each meal for 8 days. Faeces were collect
ed to measure total fat and fi ee fatty acid excretions. The mean base
line-corrected excretion (% of dietary fat) in groups A, B, C and D),
respectively, was 37.0, 30.4, 30.3 and 34.5 for total fat, and 6.5, 4.
3, 2.6 and 3.9 for free fatty acids. The 95% confidence intervals for
the difference between the means for high fibre and low fibre groups a
nd for intracellular fat and extracellular fat groups, respectively, w
ere 1.4 +/- 4.9 and 5.5 +/- 4.9 for total fat, and 2.2 +/- 3.1 and 1.9
+/- 3.1 for free fatty acids. The statistically significant differenc
e (P < 0.05) in total faecal fat between intracellular fat and extrace
llular fat groups, in absolute terms < 5 g fat/day, was not regarded a
s clinically relevant. Under the conditions of this study, dietary fib
re content and accessibility of fat had no relevant effect on the inhi
bition of fat absorption by orlistat.