The effects of maternal exposure to 2,3,7,8-tetrachlorodibenzo-p-dioxin on testicular steroidogenesis in infantile male rats
(2006) In International Journal of Andrology 29(2). p.313-322- Abstract
- Exposure of adult male animals to 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) decreases serum androgen concentrations. Reduction in androgen levels after maternal exposure has also been reported, but these results have not been reproduced. We have earlier shown that TCDD stimulates rather than inhibits testosterone synthesis in the prenatal rat testis. The aim of the present study was to elucidate in utero-induced effects of TCDD on testicular steroidogenesis in the 14-day-old infant rats. At that time the foetal Leydig cell population is still the prevailing source of androgens. Pregnant Sprague-Dawley dams were given a single oral dose of TCDD (0, 0.04, 0.2, or 1.0 microg/kg) on day 13 of pregnancy. On postnatal day 14, the body weight of... (More)
- Exposure of adult male animals to 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) decreases serum androgen concentrations. Reduction in androgen levels after maternal exposure has also been reported, but these results have not been reproduced. We have earlier shown that TCDD stimulates rather than inhibits testosterone synthesis in the prenatal rat testis. The aim of the present study was to elucidate in utero-induced effects of TCDD on testicular steroidogenesis in the 14-day-old infant rats. At that time the foetal Leydig cell population is still the prevailing source of androgens. Pregnant Sprague-Dawley dams were given a single oral dose of TCDD (0, 0.04, 0.2, or 1.0 microg/kg) on day 13 of pregnancy. On postnatal day 14, the body weight of male offspring was reduced after exposure to 1.0 microg/kg TCDD (from 33.9 +/- 1.66 g to 31.6 +/- 2.67 g). Relative testis weight, plasma testosterone, luteinizing hormone and follicle-stimulating hormone levels remained unaltered in all exposure groups. Moreover, in ex vivo incubations, testosterone and cAMP production was not affected. StAR protein level in the freshly isolated testes was increased in the 0.2 microg/kg group, and seminiferous cord diameter in the 0.04 microg/kg group. The present study confirms our earlier findings in in utero TCDD-exposed foetal testis indicating that maternal TCDD exposure does not negatively influence the developmental testosterone production of foetal type Leydig cells in rats. (Less)
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https://lup.lub.lu.se/record/1298222
- author
- Haavisto, T E ; Myllymaki, S A ; Adamsson, N A ; Brokken, Leon LU ; Viluksela, M ; Toppari, J and Paranko, J
- publishing date
- 2006
- type
- Contribution to journal
- publication status
- published
- subject
- in
- International Journal of Andrology
- volume
- 29
- issue
- 2
- pages
- 313 - 322
- publisher
- Wiley-Blackwell
- external identifiers
-
- wos:000235892800001
- scopus:33644890768
- ISSN
- 0105-6263
- DOI
- 10.1111/j.1365-2605.2005.00568.x
- language
- English
- LU publication?
- no
- id
- d8da2324-4f50-4c04-a287-3ec6c8c20c79 (old id 1298222)
- date added to LUP
- 2016-04-01 17:06:39
- date last changed
- 2022-02-13 02:43:10
@article{d8da2324-4f50-4c04-a287-3ec6c8c20c79,
abstract = {{Exposure of adult male animals to 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) decreases serum androgen concentrations. Reduction in androgen levels after maternal exposure has also been reported, but these results have not been reproduced. We have earlier shown that TCDD stimulates rather than inhibits testosterone synthesis in the prenatal rat testis. The aim of the present study was to elucidate in utero-induced effects of TCDD on testicular steroidogenesis in the 14-day-old infant rats. At that time the foetal Leydig cell population is still the prevailing source of androgens. Pregnant Sprague-Dawley dams were given a single oral dose of TCDD (0, 0.04, 0.2, or 1.0 microg/kg) on day 13 of pregnancy. On postnatal day 14, the body weight of male offspring was reduced after exposure to 1.0 microg/kg TCDD (from 33.9 +/- 1.66 g to 31.6 +/- 2.67 g). Relative testis weight, plasma testosterone, luteinizing hormone and follicle-stimulating hormone levels remained unaltered in all exposure groups. Moreover, in ex vivo incubations, testosterone and cAMP production was not affected. StAR protein level in the freshly isolated testes was increased in the 0.2 microg/kg group, and seminiferous cord diameter in the 0.04 microg/kg group. The present study confirms our earlier findings in in utero TCDD-exposed foetal testis indicating that maternal TCDD exposure does not negatively influence the developmental testosterone production of foetal type Leydig cells in rats.}},
author = {{Haavisto, T E and Myllymaki, S A and Adamsson, N A and Brokken, Leon and Viluksela, M and Toppari, J and Paranko, J}},
issn = {{0105-6263}},
language = {{eng}},
number = {{2}},
pages = {{313--322}},
publisher = {{Wiley-Blackwell}},
series = {{International Journal of Andrology}},
title = {{The effects of maternal exposure to 2,3,7,8-tetrachlorodibenzo-p-dioxin on testicular steroidogenesis in infantile male rats}},
url = {{http://dx.doi.org/10.1111/j.1365-2605.2005.00568.x}},
doi = {{10.1111/j.1365-2605.2005.00568.x}},
volume = {{29}},
year = {{2006}},
}