Adrenal steroids stimulate growth and progesterone receptor levels in rat uterus and DMBA-induced mammary tumors
We have studied the effect of treatment with the adrenal steroids androst-5-ene-3 beta,17 beta-diol (delta 5-diol) and dehydroepiandrosterone (DHEA) on the growth and progesterone receptor levels of dimethylbenz(a)anthracene (DMBA)-induced mammary tumors in the rat. While the total number of tumors in ovariectomized animals was 0.60 +/- 0.19 tumor per rat after 24 days, it increased to 2.54 +/- 0.50 (p less than 0.01) and 1.42 +/- 0.26 (p less than 0.01) in the delta 5-diol and DHEA (2 mg, twice daily) treated animals, respectively. While very few new tumors developed during a 24-day period in ovariectomized animals (0.07 +/- 0.07/rat), an average of 0.47 +/- 0.19 (p less than 0.05) new tumor per animal appeared in intact rats. In ovariectomized animals treated with delta 5-diol or DHEA, the numbers of new tumors were 0.77 +/- 0.26 (p less than 0.05) and 0.42 +/- 0.15 (p less than 0.05), respectively. An even more striking effect was observed on average total tumor area, which decreased from 4.70 +/- 0.95 cm2 in intact animals to 0.75 +/- 0.27 cm2 (p less than 0.01) following ovariectomy. Values of 9.79 +/- 2.25 (p less than 0.01) and 3.93 +/- 0.86 cm2 (p less than 0.01) were found in the delta 5-diol- and DHEA-treated ovariectomized animals, respectively. Treatment of ovariectomized animals with delta 5-diol and DHEA caused a marked increase (p less than 0.01) in progesterone receptor levels in both the uteri and DMBA-induced mammary tumors. Uterine weight was also stimulated (p less than 0.01) by treatment with the two adrenal steroids.(ABSTRACT TRUNCATED AT 250 WORDS).
| Medienart: |
Artikel |
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| Erscheinungsjahr: |
1986 |
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| Erschienen: |
1986 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:8 |
|---|---|
| Enthalten in: |
Breast cancer research and treatment - 8(1986), 3 vom: 24., Seite 241-8 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Spinola, P G [VerfasserIn] |
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| Anmerkungen: |
Date Completed 24.07.1987 Date Revised 03.09.2019 published: Print Citation Status MEDLINE |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM029359376 |
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| 100 | 1 | |a Spinola, P G |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Adrenal steroids stimulate growth and progesterone receptor levels in rat uterus and DMBA-induced mammary tumors |
| 264 | 1 | |c 1986 | |
| 336 | |a Text |b txt |2 rdacontent | ||
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| 500 | |a Date Completed 24.07.1987 | ||
| 500 | |a Date Revised 03.09.2019 | ||
| 500 | |a published: Print | ||
| 500 | |a Citation Status MEDLINE | ||
| 520 | |a We have studied the effect of treatment with the adrenal steroids androst-5-ene-3 beta,17 beta-diol (delta 5-diol) and dehydroepiandrosterone (DHEA) on the growth and progesterone receptor levels of dimethylbenz(a)anthracene (DMBA)-induced mammary tumors in the rat. While the total number of tumors in ovariectomized animals was 0.60 +/- 0.19 tumor per rat after 24 days, it increased to 2.54 +/- 0.50 (p less than 0.01) and 1.42 +/- 0.26 (p less than 0.01) in the delta 5-diol and DHEA (2 mg, twice daily) treated animals, respectively. While very few new tumors developed during a 24-day period in ovariectomized animals (0.07 +/- 0.07/rat), an average of 0.47 +/- 0.19 (p less than 0.05) new tumor per animal appeared in intact rats. In ovariectomized animals treated with delta 5-diol or DHEA, the numbers of new tumors were 0.77 +/- 0.26 (p less than 0.05) and 0.42 +/- 0.15 (p less than 0.05), respectively. An even more striking effect was observed on average total tumor area, which decreased from 4.70 +/- 0.95 cm2 in intact animals to 0.75 +/- 0.27 cm2 (p less than 0.01) following ovariectomy. Values of 9.79 +/- 2.25 (p less than 0.01) and 3.93 +/- 0.86 cm2 (p less than 0.01) were found in the delta 5-diol- and DHEA-treated ovariectomized animals, respectively. Treatment of ovariectomized animals with delta 5-diol and DHEA caused a marked increase (p less than 0.01) in progesterone receptor levels in both the uteri and DMBA-induced mammary tumors. Uterine weight was also stimulated (p less than 0.01) by treatment with the two adrenal steroids.(ABSTRACT TRUNCATED AT 250 WORDS) | ||
| 650 | 4 | |a Journal Article | |
| 650 | 7 | |a Adrenal Cortex Hormones |2 NLM | |
| 650 | 7 | |a Receptors, Progesterone |2 NLM | |
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