The Study
Tissue specificity of 8-prenylnaringenin: protection from ovariectomy induced bone loss with minimal trophic effects on the uterus.
This study is like a laboratory experiment with rats and mice. Scientists removed the ovaries from the rats to make them lose bone like women do after menopause, then gave them a plant compound (8-PN) to see what happened. They found that the rats given 8-PN lost less bone than rats not given the compound. BUT this was done in animals, not people, so we can't say for sure it would work the same way in humans. It's showing a connection (association), not proving the compound actually causes the bone protection.
Analysis score
Maximum 72 for a cohort study.
Where the score came from
Scientists tested 8-prenylnaringenin, a compound from hops, in rats without ovaries (mimicking menopause). They found it protected bones from weakening while having much smaller effects on the uterus compared to standard estrogen treatment.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 56 / 100
Quality score
Groups of people are followed over time to see who develops an outcome. Strong for identifying risk factors and associations, but cannot prove causation as firmly as RCTs.
Key takeaways
Summary
Based on the study abstract and findings.
- 1This is an animal study - results may not directly apply to humans.
- 2The compound shows promise for separating bone protection from uterine side effects, which could be significant for postmenopausal women if translated to humans.
- 38-PN completely protected against bone loss in ovariectomized rats.
- 4At bone-protective doses, it had 10-fold lower effect on uterus compared to estrogen.
- 5Effects were dose-independent.
- 6Pronounced estrogenic activity found in prostate of mice.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
The Journal of steroid biochemistry and molecular biology
Year
2005
Authors
M. Hümpel, P. Isaksson, O. Schaefer, U. Kaufmann, P. Ciana, A. Maggi, W. Schleuning
Related Content
Claims (6)
A compound found in hops called 8-prenylnaringenin can act like the hormone estrogen in the body. It might attach to estrogen receptors and could potentially cause fat to build up around the belly area.
A compound found in hops called 8-prenylnaringenin (8-PN) appears to be much weaker at stimulating the uterus and uterine lining than the hormone estrogen, even when both are given at doses that protect bones equally well.
Scientists tested a plant compound called 8-prenylnaringenin in special mice that have been genetically modified to show when estrogen-related activity is happening, and they found that this compound strongly activated estrogen-like effects in the mice's prostate glands.
A compound called 8-prenylnaringenin (8-PN) was found to fully stop bone loss in rats that had their ovaries removed - these rats are used to study a condition similar to osteoporosis that happens to women after menopause.
This claim is about a compound called 8-prenylnaringenin (found in hops) and how it affects the uterus and uterine lining in rats that had their ovaries removed. The claim says it has very small growth effects on these tissues, and importantly, these effects don't change no matter how much of the compound is given.
Researchers found that a plant compound called 8-prenylnaringenin specifically works on bone tissue, confirmed by using special genetically modified mice that light up when the compound is active in bones.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.