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Heimbach J.T.,JHEIMBACH LLC | Egawa H.,DSP Gokyo Food and Chemical Co. | Marone P.A.,Product Safety Laboratories | Bauter M.R.,Product Safety Laboratories | Kennepohl E.,Equinox Scientific Services
International Journal of Toxicology | Year: 2013

Forty male and 40 female Crl:SD® CD® IGS rats were fed diets containing 0, 40 000, 80 000, or 120 000 ppm tamarind seed polysaccharide (equivalent to 3450.8, 6738.9, or 10 597.1 mg/kg bw/day and 3602.1, 7190.1, or 10 690.7 mg/kg bw/day for males and females, respectively) for 28 days. Animals were observed for adverse clinical signs, body weight, feed consumption, hematology and clinical chemistry parameters, urinalysis values were recorded, and at the end of the study the rats underwent a full necropsy. Functional Observational Battery (FOB) and Motor Activity (MA) tests were performed on all animals. There were no mortalities, no clinical or ophthalmologic signs, body weight, body weight gain, food consumption and food efficiency, FOB or MA findings associated with the administration of tamarind seed polysaccharide. Initial statistically significant decreases in body weight gain and food consumption resolved after the first week and were considered the result of reduced palatability. There were no adverse changes in hematology, coagulation, clinical chemistry or urinalysis parameters in male or female rats considered the result of test substance administration. At necropsy, there were no macroscopic, histopathological findings, estrus cycle, or organ weight changes deemed related to administration of the test substance. Under the conditions of this study and based on the toxicological endpoints evaluated, the no-observed-adverse-effect level (NOAEL) for tamarind seed polysaccharide in the diet was the highest concentration tested of 120 000 ppm (equivalent to 10 597 mg/kg bw/day and 10 691 mg/kg bw/day for male and female rats, respectively). © 2013 The Author(s).

Szabo N.J.,Burdock Group | Matulka R.A.,Burdock Group | Marone P.A.,Product Safety Laboratories | Bauter M.R.,Product Safety Laboratories | And 7 more authors.
Food and Chemical Toxicology | Year: 2014

Numbers of macro- and microalgae have been used as food sources in various cultures for centuries. Several microalgae are currently being developed as modern food ingredients. The dietary safety of oleic-rich microalgal oil produced using a heterotrophic fermentation process was assessed in a 13-week feeding trial in rats with genotoxic potential evaluated using in vitro and in vivo assays. In the genotoxicity assays, the test oil was not mutagenic in Salmonella typhimurium or Escherichia coli tester strains (≤5000. μg/plate) with or without metabolic activation. Further, no clastogenic response occurred in chromosome aberration assays in the bone marrow of mice administered a single intraperitoneal dose (2000. mg/kg). In the subchronic study, rats consumed feed containing 0, 25,000, 50,000 or 100,000. ppm oleic-rich oil for 90. days. No treatment-related mortalities or adverse effects occurred in general condition, body weight, food consumption, ophthalmology, urinalysis, hematology, clinical chemistry, gross pathology, organ weights or histopathology. Although several endpoints exhibited statistically significant effects, none were dose-related or considered adverse. Taking all studies into consideration, the NOAEL for the oleic-rich oil was 100,000. ppm, the highest concentration tested and equivalent to dietary NOAELs of 5200. mg/kg bw/day and 6419. mg/kg bw/day in male and female rats, respectively. © 2014 Elsevier Ltd.

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