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Structure-activity relationship studies on vitamin D-based selective SREBP/SCAP inhibitor KK-052
Fumihiro Kawagoe1, Sayuri Mototani1, Aileen Mendoza2
1Faculty of Pharmaceutical Sciences, Teikyo University Itabashi-ku Tokyo 173-8605 Japan akittaka@pharm.teikyo-u.ac.jp.
New vitamin D analogues inhibit lipid biosynthesis by targeting sterol regulatory element-binding protein (SREBP) and SREBP cleavage-activating protein (SCAP). These compounds lack vitamin D receptor (VDR) activity, offering a potential therapeutic strategy for metabolic disorders.
Area of Science:
- Biochemistry
- Endocrinology
- Medicinal Chemistry
Background:
- Vitamin D3 metabolites regulate lipid biosynthesis via sterol regulatory element-binding protein (SREBP) and SREBP cleavage-activating protein (SCAP) degradation.
- Previous development of KK-052, a vitamin D-based inhibitor, showed efficacy in mitigating hepatic lipid accumulation without calcemic effects.
Purpose of the Study:
- To synthesize and evaluate novel analogues of KK-052 with enhanced SREBP/SCAP inhibitory activity.
- To assess the vitamin D receptor (VDR) activity of these new analogues.
Main Methods:
- Chemical synthesis of KK-052 analogues with modifications on the phenyl ring.
- In vitro assays to determine SREBP/SCAP inhibitory potential.
- VDR activity assays to confirm the absence of calcemic effects.
Main Results:
- Two novel KK-052 analogues demonstrated superior SREBP/SCAP inhibitory activity compared to the parent compound.
- All synthesized analogues were found to lack VDR activity.
Conclusions:
- The newly developed KK-052 analogues represent potent VDR-silent inhibitors of SREBP/SCAP.
- These compounds hold promise for further development as therapeutic agents targeting lipid metabolism disorders.
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