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IARC MONOGRAPHS ON THE EVALUATION OF CARCINOGENIC ...

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Table 6 (contd)<br />

Test system Assay Dose Result Reference<br />

Adduct formation of AAII in DNA (calf thymus) in vitro, activated by<br />

hepatic microsomes from rats, anaerobic<br />

Adduct formation of AAI in DNA (calf thymus) in vitro activated by<br />

recombinant human CYP1A1 in microsomes from a baculovirus insect<br />

cell expression system, anaerobic<br />

Adduct formation of AAII in DNA (calf thymus) in vitro, activated by<br />

recombinant human CYP1A1 in microsomes from a baculovirus<br />

insect cell expression system, anaerobic<br />

Adduct formation of AAI in DNA (calf thymus) in vitro, activated by<br />

recombinant human CYP1A2 in microsomes from a baculovirus<br />

insect cell expression system, anaerobic<br />

Adduct formation of AAII in DNA (calf thymus) in vitro, activated by<br />

recombinant human CYP1A2 in microsomes from a baculovirus<br />

insect cell expression system, anaerobic<br />

Adduct formation of AA mixture in DNA of opossum kidney cells<br />

after 24 h incubation<br />

Nuclease P1-enhanced 32 Ppostlabelling<br />

10 μM<br />

20 μM<br />

Total adduct level:<br />

0.7/10 7 nucleotides<br />

Total adduct level:<br />

22/10 7 nucleotides<br />

Total adduct level:<br />

2.5/10 7 nucleotides<br />

Total adduct level:<br />

19/10 7 nucleotides<br />

Total adduct level:<br />

2/10 7 nucleotides<br />

Total adduct level:<br />

47/10 7 nucleotides<br />

87/10 7 nucleotides<br />

15/10 7 nucleotides after<br />

6 days of recovery<br />

Stiborová et al.<br />

(2001b)<br />

(contd)<br />

Lebeau et al.<br />

(2001)<br />

AA, aristolochic acids (mixed); AAI and AAII, aristolochic acids I and II; dA-AAI, 7-(deoxyadenosin-N 6 -yl)aristolactam I; dA-AAII, 7-(deoxyadenosin-N 6 -yl)aristolactam<br />

II; dG-AAI, 7-(deoxyguanosin-N 2 -yl)aristolactam I; dG-AAII, 7-(deoxyguanosin-N 2 -yl)aristolactam II; vis, visible<br />

a<br />

S9 mix from Aroclor 1254-pretreated rats<br />

b<br />

Anaerobic: reaction mixture purged with argon for 15 min before addition of substrates<br />

c<br />

Microsomes from β-naphthoflavone-pretreated rats<br />

d<br />

Adduct formed in incubations of aristolactam I with DNA and microsomes is found in the ureter of a Chinese herb nephropathy patient, shown by co-chromatography.<br />

e<br />

Same adducts as found in vivo in the kidney of Chinese herb nephropathy patients, as shown by co-chromatography<br />

SOME TRADITI<strong>ON</strong>AL HERBAL MEDICINES 111

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