Cited by 201Phytochemical Studies and BioactivitiesSteroid Chemistry and BiochemistryHormonal and reproductive studies

Phytoecdysteroids and Anabolic Androgenic Steroids--Structure and Effects on Humans

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Bathori, Maria, Toth, Noemi, Hunyadi, Attila, Marki, Arpad, Zador, Erno·2008·Current Medicinal Chemistry

Abstract

Phytoecdysteroids are structural analogs of the insect molting hormone ecdysone. Plants comprise rich sources of ecdysteroids in high concentration and with broad structural diversity. Ecdysteroids have a number of proven beneficial effects on mammals but the hormonal effects of ecdysteroids have been proven only in arthropods. Their structures are somewhat similar to those of the vertebrate steroid hormones but there are several structural differences between the two steroid groups. Despite of these essential structural differences, ecdysteroids exert numerous effects in vertebrates that are similar to those of vertebrate hormonal steroids, and they may serve as effective anabolic, hepatoprotective, immunoprotective, antioxidant and hypoglycemic agents. Ecdysteroids do not bind to the cytosolic steroid receptors, instead, they are likely to influence signal transduction pathways, like the anabolic steroids, possibly via membrane bound receptors. The application of phytoecdysteroids is a promising alternative to the use of anabolic-androgenic steroids because of the apparent lack of adverse effects. The prospective use of phytoecdysteroids may extend to treatments of pathological conditions where anabolic steroids are routinely applied. One of the most cited aspects of phytoecdysteroid application (on the Internet) is the increase of muscle size. However in this field too stringent research is needed as an adequate cytological explanation is not yet available for the anabolic. This paper reports on the most important structural differences between androgenic hormones, their synthetic analogs and ecdysteroids. The anabolic/hormonal effects and the possible mechanisms of action of these compounds are also discussed as concerns the skeletal muscle.

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  • Ecdysterone exerts its anabolic effects primarily through interaction with nuclear receptors, though its mechanism differs from that of traditional anabolic steroids.

    “Ecdysterone, like other ecdysteroids, exerts its anabolic effects primarily through interaction with nuclear receptors, though its mechanism differs from that of traditional anabolic steroids.”

    From Molecular insights into the role of Estrogen Receptor Beta in Ecdysterone Mediated Anabolic Activity (2025) · cites this paper as [4]

    The ‘Effects on Protein Synthesis’ section says ecdysteroids are not likely to act through the classical cytoplasmic-receptor pathway. ‘The Mechanism of Action of Anabolics’ instead suggests membrane-associated pathways. The paper supports a difference from traditional anabolic steroids, but contradicts the claim that ecdysterone acts primarily through nuclear receptors. (LLM, conf=0.89)

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  • Earlier in vitro and in vivo studies confirmed non-hormonal anabolic activities of 20E and other ecdysteroids, including stimulation of protein synthesis, increased body and organ weight, and improved skeletal muscle mass and fiber size.

    “Earlier in vitro and in vivo studies confirmed the non-hormonal anabolic activities of 20E and other ecdysteroids [5] in terms of stimulation of protein synthesis, increased weight of the whole body and internal organs, and improved skeletal muscle mass and fiber size [8,9].”

    From Prevention of Diet-Induced Obesity by Phytoecdysteroids 20-Hydroxyecdysone and Calonysterone—Unexpected Modulation of Androgen Balance in Normal and Obese Rats (2026) · cites this paper as [5]

    The “Effects on Protein Synthesis” section (page unavailable) reports anabolic effects of 20-hydroxyecdysone and other ecdysteroids, and the “Hormonal Activity on Mammals” section says an absence of androgenic effects has been widely observed in experimental animals. But the review also identifies a study reporting androgen-like anabolic action, so it does not support the unqualified assertion that the activity was confirmed to be non-hormonal. The specific weight and muscle outcomes are attached to other citations in the citing sentence, not to this source. (LLM, conf=0.84)

    Experimental — accuracy not yet measured
  • Endogenous mammalian steroid hormones usually accompany a positive anabolic effect with a dangerous androgenic one.

    “This is in contrast to steroid hormones that are endogenous in mammals that usually accompany the positive anabolic effect with an often dangerous androgenic one [4,5,6].”

    From Molecular Targets of 20-Hydroxyecdysone in Mammals, Mechanism of Action: Is It a Calorie Restriction Mimetic and Anti-Aging Compound? (2025) · cites this paper as [4]

    The 'Anabolic Steroid Effect in Muscle' section reports anabolic effects of testosterone, and 'Anabolic-Androgenic Steroids' says complete separation of anabolic and androgenic effects was impossible. Those sections support the pairing of effects, but do not establish that the androgenic effect is often dangerous. Page numbers are unavailable in our copy. (LLM, conf=0.83)

    Experimental — accuracy not yet measured
  • Lower doses of 20-hydroxyecdysone showed no significant effects, but amounts more than 5 μg/kg body weight were considered effective.

    “It is considered that lower doses showed no significant effects but reported that amounts more than 5 μg/kg body weight were considered effective [102].”

    From Ecdysterone and Turkesterone—Compounds with Prominent Potential in Sport and Healthy Nutrition (2024) · cites this paper as [102]

    The Effects on Protein Synthesis section reports effects of 20-hydroxyecdysone, and the Ecdysteroid Containing Preparations section says 5 mg/kg body weight per day is generally recommended. Neither passage says lower doses had no significant effect or establishes an effective threshold above 5 μg/kg; the recommended dose is 1,000 times that figure. Page numbers are unavailable in our copy. (LLM, conf=0.78)

    Experimental — accuracy not yet measured
  • Up to now, structure activity relationship studies have been limited to a comparison of various natural phytoecdysteroids, and the biological activity of metabolites is not much documented, with the exception of Post, which showed an anabolic activity similar to that of 20E.

    “Up to now, structure activity relationship studies have been limited to a comparison of various natural phytoecdysteroids, 30 and the biological activity of metabolites is not much documented, with the exception of Post, which showed an anabolic activity similar to that of 20E. 31”

    From A Phase 1 study for safety and pharmacokinetics of BIO101 (20‐hydroxyecdysone) in healthy young and older adults (2023) · cites this paper as [30]

    Split into 2 atoms — 0 confirmed, 1 partially supported, 0 disputed, 0 misattributed, 1 unverifiable. Expand the claim to see per-atom verdicts.

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Cited by

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Authors
Bathori, M., Toth, N., Hunyadi, A., Marki, A., & Zador, E.
Affiliations
University of Szeged (HU)
Venue
Current Medicinal Chemistry
Published
2008-01-01
Volume
15
Issue
1
Pages
75-91
ISSN
0929-8673 (ISSN-L)
OpenAlex
W2122262893
Cited by
201
References
10
Citations by year
2026: 13 · 2025: 10 · 2024: 15 · 2023: 24 · 2022: 10 · 2021: 19 · 2020: 12 · 2019: 9 · 2018: 9 · 2017: 11 · 2016: 8 · 2015: 12 · 2014: 12 · 2013: 7 · 2012: 8
FWCI
0.57
Type
journal article
Language
en
Open access
Locations
  • Current Medicinal Chemistry (publishedVersion)
  • PubMed (publishedVersion)
  • SZTE Publicatio Repozitórium (University of Szeged) (acceptedVersion, other-oa)
  • Repository of the Academy's Library (Library of the Hungarian Academy of Sciences) (acceptedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Phytochemical Studies and Bioactivities
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Steroid Chemistry and Biochemistry
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Hormonal and reproductive studies
Keywords
phytoecdysteroids, ecdysteroids, anabolic steroids, ecdysone, steroid structure, anabolic effects, muscle hypertrophy, skeletal muscle, cell surface receptors, signal transduction, hepatoprotection, immunoprotection, antioxidant activity, hypoglycemic effect
MeSH terms
Androgens, Animals, Ecdysone, Humans, Phytosterols, Structure-Activity Relationship, Protein Biosynthesis, Molecular Structure, Signal Transduction, Muscle, Skeletal, Anabolic Agents

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