Moreover, there were

no test material-related changes in

Moreover, there were

no test material-related changes in motor activity for either sex. Likewise, krill powder administration did not affect any of the parameters measured by a functional observation battery of assessments that included landing foot splay, fore grip, hind grip and tail flick. There were no ophthalmoscopy findings that were considered to be related to administration of krill powder selleck products for 13 weeks. Both relative (Table 5) and absolute (Table 6) organ weights are presented. We observed a decreased absolute heart weight in both sexes, compared to control animals. However, after adjustment for body weight, no significant changes in heart weights were observed. After krill powder administration for 13 weeks, prominent liver lobulation was observed in 4 out of 10 males, but not in any of the female animals (Table 7). Periportal microvesicular hepatocyte vacuolation was observed in 2 out of 10 males which received the krill powder diet, but this finding was not statistically different, when compared with the control animals (P < 0.05). This correlated with the findings of prominent liver lobulation

in 4 male animals observed at necropsy,. Since the hepatocyte vacuolation in the two male animals signaling pathway was not associated with hepatocellular necrosis or inflammation, and clinical pathology findings suggesting liver impairment was not detected, this finding was considered adaptive and non-adverse. There were no liver vacuolation observations in females receiving krill powder or in control animals. This 13-week subchronic toxicity study in rats using krill powder at a dose of 9.67% in the diet demonstrates a lack of toxicologically significant adverse effects and demonstrates that krill powder is a safe source of omega-3 fatty acids. The 9.67% dose of krill powder was chosen since it corresponds to a dose of 5% krill oil, which was previously found to be the NOAEL in a 13-week toxicity study Leukotriene-A4 hydrolase [22]. Given that the effects of the toxicity study were not adverse in nature, the NOAEL for

the conditions of this study was considered to be 9.67% krill powder (equating to 5357 mg krill powder/kg body weight/day for males and 6284 mg krill powder/kg body weight/day for females). However, since only one dose of krill powder was used in this study, no definitive statement on NOAEL can be made, which should be seen as a limitation to this study. No differences were noted in body weight or food consumption during the krill powder treatment. Administration of krill powder resulted in abnormally pale and/or yellow coloured faeces, which was considered a result of the test diet which itself had a red colour due to the astaxanthin content in krill powder. One animal in the krill powder group was euthanized during the study due to an open and wet lesion on dorsal neck.

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