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Reproduction in Domestic Animals - Facultad de Ciencias Veterinarias

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16 t h International Congress on Animal <strong>Reproduction</strong><br />

Poster Abstracts 213<br />

P561<br />

Precocious <strong>de</strong>velopment of bulbourethral glands <strong>in</strong> male<br />

pigs exposed to di(2ethylhexyl) phthalate before puberty<br />

Ljungvall, K 1 , Veeramachaneni, KNR 2 , Magnusson, U 1 *<br />

1Division of <strong>Reproduction</strong>, Dep Cl<strong>in</strong>ical Sciences, Swedish University of<br />

Agricultural Sciences, Swe<strong>de</strong>n; 2 Animal <strong>Reproduction</strong> and Biotechnology<br />

Laboratory, Colorado State University, United States<br />

Phthalates are common <strong>in</strong>dustrial chemicals used <strong>in</strong> large volumes <strong>in</strong>,<br />

for <strong>in</strong>stance, cosmetic products, <strong>in</strong> pa<strong>in</strong>ts, and as plastic softeners.<br />

Acute toxicity is generally consi<strong>de</strong>red to be low, but reproductive<br />

effects have been reported <strong>in</strong> laboratory ro<strong>de</strong>nts. Typically these<br />

effects have been seen after exposure dur<strong>in</strong>g <strong>de</strong>velopment, especially<br />

dur<strong>in</strong>g the foetal period. Data on effects <strong>in</strong> other, non-ro<strong>de</strong>nt,<br />

mammals is scarce and so are those regard<strong>in</strong>g accessory reproductive<br />

glands. The objective of the current study was therefore to <strong>in</strong>vestigate<br />

the effect of di(2-ethylhexyl) phthalate (DEHP) on the bulbourethral<br />

glands <strong>in</strong> the pig. In this split-litter <strong>de</strong>sign experiment, male piglets<br />

were exposed orally three times weekly to 300mg/kg of DEHP or<br />

placebo between 3 and 7 weeks of age. The effects on the<br />

bulbourethral glands were exam<strong>in</strong>ed morphologically immediately<br />

after the exposure at seven weeks of age <strong>in</strong> one sub-group, and<br />

postpuberally at n<strong>in</strong>e months of age <strong>in</strong> the other. Three of the seven<br />

DEHP- treated animals <strong>in</strong> seven-week-old group had bulbourethral<br />

glands at a stage of maturation far more advanced than that of<br />

controls. While there were no obvious differences <strong>in</strong> the cellular<br />

composition between the treatment groups <strong>in</strong> n<strong>in</strong>e-month-old animals,<br />

the bulbourethral glands were heavier (p

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