4-Hydroxytamoxifen
Shop 4-Hydroxytamoxifen on KimeraChems · code GUIDE (10% off)Definition
4-Hydroxytamoxifen is a selective estrogen receptor modulator (SERM) researched as one of tamoxifen’s primary active metabolites. In research contexts, it is explored for its high-affinity binding to estrogen receptors and its ability to modulate estrogen-responsive transcription in a tissue-selective manner. It is often used as a direct tool compound in estrogen-receptor-signaling studies because it bypasses the metabolic conversion required when parent tamoxifen is used in certain models.
Available Formats
- Transdermal gel (1 mg per mL, 50 mL / 50 mg total)
Mechanism of Action
Research suggests 4-Hydroxytamoxifen may: Because SERM activity is highly tissue- and context-dependent, observed outcomes may vary widely across cell lines, species, and baseline endocrine conditions.
- Bind estrogen receptors with high affinity and alter receptor conformation
- Antagonize estrogen-receptor signaling in breast-cancer-related paradigms
- Act as a tissue-selective modulator with context-dependent agonist or antagonist activity
- Alter estrogen-responsive gene transcription and downstream proliferation markers
- Influence estrogen-receptor coactivator and corepressor recruitment
- Alter progesterone-receptor expression and other estrogen-regulated endpoints depending on study design
Areas of Investigation
4-Hydroxytamoxifen is commonly studied in
- Estrogen-receptor-positive breast-cancer models
- Estrogen-signaling and receptor-binding assays
- Gene-expression and transcriptional-regulation research
- Cell-proliferation, apoptosis, and cell-cycle studies
- Comparative SERM research involving tamoxifen, raloxifene, and newer estrogen-receptor modulators
- Local-delivery paradigms in which topical exposure is used to study localized estrogen-receptor modulation
Safety Profile
Reported observations include
- Hot-flash-like thermoregulatory effects in sensitive models
- Mood lability or sleep-disruption signals in some paradigms
- Headache-like effects and visual-disturbance signals in SERM-sensitive settings
- Changes in liver-associated biomarkers in some study designs
- Endometrial-signaling changes treated as a conservative monitoring consideration in longer-duration designs
- Thromboembolic-risk signals associated with the broader SERM class
- Local skin irritation and absorption variability with transdermal formulations
Interaction Notes
4-Hydroxytamoxifen is often explored alongside compounds and variables that influence endocrine-signaling endpoints
For educational purposes only. Not for human consumption.