Journal article Open Access

A Dose–Response Analysis of the Reproductive Effects of a Single Gestational Dose of 2,3,7,8-Tetrachlorodibenzo-p-dioxin in Male Long Evans Hooded Rat Offspring,

Gray, L. E.; Ostby, J. S.; Kelce, W. R.

MARC21 XML Export

<?xml version='1.0' encoding='UTF-8'?>
<record xmlns="">
  <datafield tag="540" ind1=" " ind2=" ">
    <subfield code="u"></subfield>
    <subfield code="a">Creative Commons Zero v1.0 Universal</subfield>
  <datafield tag="260" ind1=" " ind2=" ">
    <subfield code="c">1997-09-01</subfield>
  <controlfield tag="005">20200120170820.0</controlfield>
  <controlfield tag="001">1229970</controlfield>
  <datafield tag="909" ind1="C" ind2="O">
    <subfield code="p">openaire</subfield>
    <subfield code="o"></subfield>
  <datafield tag="520" ind1=" " ind2=" ">
    <subfield code="a">Male rats exposedin uteroto 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) display reduced fertility as a consequence of the direct action of TCDD on the epididymides, as well as delayed puberty and altered reproductive organ weights. The current study provides dose–response data for the reproductive effects of TCDD, administered during pregnancy, with an emphasis on the effects of TCDD on testicular, epididymal, and ejaculated sperm numbers. Long Evans Hooded rats were dosed by gavage with 0, 0.05, 0.20, or 0.80 μg TCDD/kg on Day 15 of gestation. After birth, growth, viability, and developmental landmarks were monitored in both male and female offspring. Shortly after puberty (49 and 63 days of age) and at 15 months of age, male offspring were necropsied. Growth and viability of the pups were reduced only at 0.80 μg TCDD/kg, eye opening was accelerated (all dosage groups), and puberty was delayed (at 0.20 and 0.80 μg TCDD/kg). Treated progeny displayed transient reductions in ventral prostate and seminal vesicle weights, while epididymal sperm reserves and glans penis size were permanently reduced. Ejaculated sperm numbers were reduced (45% in the 0.8 and by 25% in the 0.05 and 0.2 μg TCDD/kg dosage groups) to a greater degree than were cauda or caput/corpus epididymal or testicular (unaffected) sperm numbers. In conclusion, administration of TCDD on Day 15 of pregnancy at 0.05 μg/kg altered eye opening and reduced ejaculated sperm counts, while higher dosage levels also delayed puberty and permanently reduced cauda epididymal sperm reserves.</subfield>
  <datafield tag="700" ind1=" " ind2=" ">
    <subfield code="a">Ostby, J. S.</subfield>
  <datafield tag="700" ind1=" " ind2=" ">
    <subfield code="a">Kelce, W. R.</subfield>
  <datafield tag="856" ind1="4" ind2=" ">
    <subfield code="s">233572</subfield>
    <subfield code="z">md5:5e38a5b9bff8910e761a6ec7a4d4c218</subfield>
    <subfield code="u"></subfield>
  <datafield tag="542" ind1=" " ind2=" ">
    <subfield code="l">open</subfield>
  <datafield tag="980" ind1=" " ind2=" ">
    <subfield code="a">publication</subfield>
    <subfield code="b">article</subfield>
  <datafield tag="100" ind1=" " ind2=" ">
    <subfield code="a">Gray, L. E.</subfield>
  <datafield tag="024" ind1=" " ind2=" ">
    <subfield code="a">10.1006/taap.1997.8223</subfield>
    <subfield code="2">doi</subfield>
  <datafield tag="245" ind1=" " ind2=" ">
    <subfield code="a">A Dose–Response Analysis of the Reproductive Effects of a Single Gestational Dose of 2,3,7,8-Tetrachlorodibenzo-p-dioxin in Male Long Evans Hooded Rat Offspring,</subfield>
  <datafield tag="650" ind1="1" ind2="7">
    <subfield code="a">cc-by</subfield>
    <subfield code="2"></subfield>
Views 99
Downloads 71
Data volume 16.6 MB
Unique views 97
Unique downloads 69


Cite as