Potential
effect of combined xenoestrogens during gestation stages on mouse offspring
Thuy Thi Bich
Vo*, Phong Van Nguyen, Ha Thi Thu Duong, Ton Dang Nguyen, Hue Thi Thu Huynh
and Hai Van Nong
Institute of
Genome Research, Vietnam Academy of Science and Technology,
No 18, Hoang Quoc
Viet, Cau Giay, Hanoi, 84-4, Vietnam
*Corresponding
Authors Email : thuytbvo@igr.ac.vn
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Publication Data
Paper received:
07 August 2013
Revised received:
29 March 2014
Accepted:
19 June 2014
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Abstract
The
synergistic effect of numerous environmental endocrine disrupting chemicals
(EDCs) has raised research concern among researchers. To extend previous
studies, the measured additional potential interactions among bisphenol A
(BPA), 4-nonylphenol (NP), 4-tert octylphenol (OP) and isobutylparaben (IBP)
in mouse model were observed. Pregnant Swiss- albino mice were treated with
binary combined chemicals (5, 50 or 500 mg kg-1 b.wt. day-1)
from gestation day (GD) 1 to 21. Interestingly, maternal exposure to these
EDCs caused fluctuation in GD time, live ratio, female/ male ratio, body and
organ weights of mouse offspring at postnatal day (PND) 1, 21, and 41 days.
At most doses early reduced 0.85 to 1.87 GD compared to controls. Besides
females / males ratio showed a significant difference in BPA + OP, BPA + IBP
groups. Female body weight at PND 21 and 41, showed a significant reduction
at all combined levels, whereas male offspring showed reduction in weight at
dose 50 mg kg-1 b.wt. day-1. The potential effects of
synergic estrogenicity detected histopathological abnormities, such as ovary
analysis revealed increase of corpora lutea, cystic follicles and an
endometrial hypertrophy and morphometric changes in uteri measurement. Taken
together, these results provided an additional insight into synergistic
effects of EDCs toxicology on reproductive tracts. ?
Key
words
Endocrine
disruptors, Gestation stage, Mixed xenoestrogens, Mouse offspring
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