Raloxifene HCl Estrogen/progestogen Receptor modulator

Cat.No.S1227

Raloxifene (LY156758, Keoxifene) HCl is a selective and orally active estrogen receptor modulator (SERM), which inhibits human cytosolic aldehyde oxidase-catalyzed phthalazine oxidation activity with IC50 of 5.7 nM.
Raloxifene HCl Estrogen/progestogen Receptor modulator Chemical Structure

Chemical Structure

Molecular Weight: 510.04

Quality Control

Chemical Information, Storage & Stability

Molecular Weight 510.04 Formula

C28H27NO4S.HCl

Storage (From the date of receipt)
CAS No. 82640-04-8 Download SDF Storage of Stock Solutions

Synonyms LY156758 (Keoxifene) HCl Smiles C1CCN(CC1)CCOC2=CC=C(C=C2)C(=O)C3=C(SC4=C3C=CC(=C4)O)C5=CC=C(C=C5)O.Cl

Solubility

In vitro
Batch:

DMSO : 100 mg/mL ( (196.06 mM) Moisture-absorbing DMSO reduces solubility. Please use fresh DMSO.)

Water : Insoluble

Ethanol : Insoluble

Molarity Calculator

Mass Concentration Volume Molecular Weight

In vivo
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Mechanism of Action

Features
Raloxifene is as effective as tamoxifen in reducing the incidence of breast cancer in postmenopausal women at increased risk.
Targets/IC50/Ki
ER [1]
(Cell-free assay)
5.7 nM
In vitro

Raloxifene, has been demonstrated as a potent uncompetitive inhibitor of human liver aldehyde oxidase-catalyzed oxidation of phthalazine, vanillin, and nicotine-Delta1'(5')-iminium ion, with Ki values of 0.87 nM, 1.2 nM and 1.4 nM. Raloxifene has also been shown to be a noncompetitive inhibitor of an aldehyde oxidase-catalyzed reduction reaction of a hydroxamic acid-containing compound, with a Ki of 51 nM. [1] Raloxifene activates TGF beta 3 promoter as a full agonist at nanomolar concentrations, and raloxifene inhibits the estrogen response element-containing vitellogenin promoter expression as a pure estrogen antagonist in transient transfection assays. [2]

In vivo

Raloxifene restores both bone mineral density and TGF beta 3 messenger RNA expression in the femur to levels measured in intact rats. [2] Raloxifene (0.1 mg/kg-10 mg/kg, orally for 5 weeks) increases bone mineral density in the distal femur and proximal tibia in ovariectomized (OVX) rat. Raloxifene reduces serum cholesteroloral with ED50 of 0.2 mg/kg in ovariectomized (OVX) rat. Raloxifene diverges dramatically from estrogen in its lack of significant estrogenic effects on uterine tissue. [3] Raloxifene prevents cancellous osteopenia as well as the changes in radial bone growth, bone resorption, and blood cholesterol, but is less effective in reducing cancellous bone formation and does not prevent uterine atrophy in ovariectomized (OVX) rats. [4] Raloxifene (3 mg/kg/day) has potent estrogenic activity on bone resorption and serum cholesterol, a lesser effect on bone formation, and minimal activity on uterine wet weight in ovariectomized (OVX) rats. [5]

References
  • https://pubmed.ncbi.nlm.nih.gov/8156931/
  • https://pubmed.ncbi.nlm.nih.gov/8666168/
  • https://pubmed.ncbi.nlm.nih.gov/10963646/

Applications

Methods Biomarkers Images PMID
Western blot p-STAT3 / STAT3 / Survivin / Bcl-2 / Bcl-xl RhoA / Rock I / Rock II / p-MLC / MLC S1227-WB1 28430601
Growth inhibition assay Cell viability S1227-viability1 28430601

Clinical Trial Information

(data from https://clinicaltrials.gov, updated on 2024-05-22)

NCT Number Recruitment Conditions Sponsor/Collaborators Start Date Phases
NCT01973738 Unknown status
Selective Estrogen Receptor Modulator
Toshihiko Kono|Tomidahama Hospital
January 2012 --
NCT02977949 Unknown status
Selective Estrogen Receptor Modulator (SERM)
Toshihiko Kono|Tomidahama Hospital
January 2012 --
NCT01573637 Completed
Schizophrenia in Post Menopausal Women
Fundació Sant Joan de Déu|Hospital Sant Joan de Deu|Parc Sanitari Sant Joan de Déu|Stanley Medical Research Institute
July 2011 Phase 3

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