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http://dx.doi.org/10.5352/JLS.2020.30.11.973

Camphor Inhibits Adipocyte Differentiation via Its Impact on SMO-dependent Regulation of Hedgehog Signaling  

Choi, Jae Young (Department of Culinary Arts & Hotel Food Service-Major in Culinary Arts, Yeonsung University)
Lim, Jong Seok (L.FOUNDER INC.)
Lee, Ja Bok (L.FOUNDER INC.)
Yang, Yung Hun (Department of Biological Engineering, College of Engineering, Konkuk University)
Publication Information
Journal of Life Science / v.30, no.11, 2020 , pp. 973-982 More about this Journal
Abstract
In this study, we examined inhibition of adipocyte differentiation associated with the administration of camphor, a substance identified in extracts of the flowering plant Chrysanthemum indicum L. (CI). No camphor-mediated cytotoxicity was observed over a period of 1-10 days in studies targeting cells of the 3T3-L1 adipocyte-like line. Experiments that featured siRNA-mediated suppression of the transmembrane proteins Patched (PTCH) and Smoothened (SMO) resulted in inhibition and activation of differentiation, respectively. Interestingly, inhibition of PTCH typically activates SMO protein targeting and serves to activate hedgehog (HH)-mediated signaling. The results of our study suggest that activation of HH-mediated signaling can inhibit adipocyte differentiation. Furthermore, expression of glioma-associated oncogene homologue 1 (Gli1) was detected by flow cytometry in 62.7±1.5% of cells in response to administration of Lactobacillus rhamnosus (KCTC 3237) and in 60.4±2.2% of cells in response to camphor; these levels are higher than those detected in undifferentiated controls (24.9±3.1%). No change in the state of fermented camphor was identified by gas chromatography-mass spectrometry (GC-MS), but a 15.41% quantitative increase was confirmed in KCTC 3237. Overall, we conclude that administration of camphor resulted in overexpression of SMO and modulated the differential expression of Gli1. Animal studies focused on the impact of camphor as an agent to counteract obesity might be considered in the future. Indeed, camphor and similar physiologically active compounds from fermented CI might be developed as new and effective treatments for obesity.
Keywords
Adipocyte; camphor; hedgehog signal; lipid; SMO;
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