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Safety evaluation of certain food additives - ipcs inchem

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126 PHYTOSTEROLS, PHYTOSTANOLS AND THEIR ESTERS<br />

Table 1. Studies <strong>of</strong> genotoxicity with phytosterols, phytosterol esters and<br />

phytosterol oxide concentrate<br />

End-point Test system Test material Concentration/<br />

dose<br />

In vitro<br />

Reverse<br />

mutation<br />

Reverse<br />

mutation<br />

Reverse<br />

mutation<br />

Chromosomal<br />

aberration<br />

Chromosomal<br />

aberration<br />

Chromosomal<br />

aberration<br />

Salmonella<br />

typhimurium<br />

TA98, TA100,<br />

TA1535 and<br />

TA1537<br />

S. typhimurium<br />

TA98, TA100,<br />

TA1535 and<br />

TA1537;<br />

Escherichia coli<br />

WP2 uvrA<br />

(pKM101)<br />

S. typhimurium<br />

TA98, TA100,<br />

TA102, TA1535<br />

and TA1537<br />

Human<br />

peripheral blood<br />

lymphocytes<br />

Human<br />

peripheral blood<br />

lymphocytes<br />

Human<br />

peripheral blood<br />

lymphocytes<br />

Gene mutation Mouse<br />

lymphoma<br />

L5178Y cells,<br />

Tk +/ locus<br />

Clastogenicity<br />

(micronucleus<br />

induction)<br />

In vivo<br />

Micronucleus<br />

induction<br />

Human<br />

peripheral blood<br />

lymphocytes<br />

Male rats, bone<br />

marrow<br />

Phytosterol<br />

mixture a<br />

Phytosterol<br />

esters a<br />

Phytosterol<br />

oxide<br />

concentrate<br />

Phytosterol<br />

mixture a<br />

Phytosterol<br />

esters a<br />

Phytosterol<br />

oxide<br />

concentrate<br />

Phytosterol<br />

esters a<br />

Phytosterol<br />

oxide<br />

concentrate<br />

Phytosterol<br />

esters c<br />

Result Reference<br />

5–5000 μg/plate Negative b Wolfreys &<br />

Hepburn<br />

(2002)<br />

50–5000 μg/plate Negative b Wolfreys &<br />

Hepburn<br />

(2002)<br />

1.6–5000 μg/plate Negative b Lea et al.<br />

(2004)<br />

40–160 μg/ml Negative b Wolfreys &<br />

Hepburn<br />

(2002)<br />

25–200 μg/ml Negative b Wolfreys &<br />

Hepburn<br />

(2002)<br />

131.1–500 μg/ml Negative b Lea et al.<br />

(2004)<br />

5–80 μg/ml Negative b Wolfreys &<br />

Hepburn<br />

(2002)<br />

Up to 625 μg/ml Negative b Lea et al.<br />

(2004)<br />

500–2000 mg/kg<br />

bw per day for 2<br />

days<br />

Negative Wolfreys &<br />

Hepburn<br />

(2002)

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