Discovery of 7-Methoxy-6-[4-(4-Methyl-1,3-Thiazol-2-yl)-1H-Imidazol-5-yl]-1,3-Benzothiazole (TASP0382088): A Potent and Selective Transforming Growth Factor-β Type I Receptor Inhibitor as a Topical Drug for Alopecia

January 2013 in “ Chemical & pharmaceutical bulletin/Chemical and pharmaceutical bulletin ”

Hideaki Amada, Hajime Asanuma, Takeshi Koami, Atsushi Okada, Mayumi Endo, Yasuji Ueda, Takumi Naruse, Akiko Ikeda

7-Methoxy-6-[4-(4-methyl-1,3-thiazol-2-yl)-1H-imidazol-5-yl]-1,3-benzothiazole TASP0382088 transforming growth factor-β TGF-β type I receptor ALK5 Smad2/3 phosphorylation topical treatment alopecia

TLDR A new compound shows promise as a topical treatment for hair loss.

The study synthesized and evaluated 7-Methoxy-6-[4-(4-methyl-1,3-thiazol-2-yl)-1H-imidazol-5-yl]-1,3-benzothiazole (TASP0382088) as a potent and selective inhibitor of the transforming growth factor-β (TGF-β) type I receptor (ALK5). Compound 11 demonstrated strong enzyme inhibitory activity with an IC50 of 4.8 nM and effectively inhibited TGF-β-induced Smad2/3 phosphorylation at the cellular level with an IC50 of 17 nM. Modifications to the compound improved its solubility in a lotion base. Topical application of a 3% lotion of compound 11 significantly inhibited Smad2 phosphorylation in mouse skin by 71% at 8 hours post-application, compared to vehicle-treated controls, indicating its potential as a topical treatment for alopecia.

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Research cited in this study

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Androgen-Inducible TGF-β1 from Balding Dermal Papilla Cells Inhibits Epithelial Cell Growth: A Clue to Understanding Paradoxical Effects of Androgen on Human Hair Growth

research Androgen-Inducible TGF-β1 from Balding Dermal Papilla Cells Inhibits Epithelial Cell Growth: A Clue to Understanding Paradoxical Effects of Androgen on Human Hair Growth

190 citations, October 2002 in “The FASEB journal”

Androgens may cause hair loss by increasing TGF-beta1 from scalp cells, which inhibits hair cell growth.

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