A Novel Bongkrekic Acid Analog-Mediated Modulation of the Size of Lipid Droplets: Evidence for the Appearance of Smaller Adipocytes

作者：Okazaki Hiroyuki; Takeda Shuso; Ishii Hiroyuki; Takemoto Yukimi; Fujita Satoshi; Suyama Masaki; Matsumoto Kenji; Shindo Mitsuru; Aramaki Hironori^*

来源：Biological & Pharmaceutical Bulletin, 2017, 40(8): 1192-1198.

DOI：10.1248/bpb.b16-00915

• bongkrekic acid
• peroxisome proliferator-activated receptor gamma (PPAR gamma)
• 3T3-L1 cell
• lipolysis
• adiponectin
• Mcp-1

Thiazolidinediones (TZDs) are known as peroxisome proliferator-activated receptor gamma (PPAR gamma) activators, and are used in the treatment of diabetes. Although the usefulness of TZDs has been demonstrated, some of their side effects are becoming an obstacle to their clinical applicability; edema is known to be evoked by the "structural characteristics" of TZD, but not by the PPAR gamma activation. Thus, novel therapeutic modalities (i.e., non-TZD-type PPAR gamma activators) having different structures to those of TZDs are desired. We previously identified bongkrekic acid (BKA) as a PPAR gamma activator using the human breast cancer MCF-7 cell line as a model system. In the present study, we newly synthesized BKA analogs and examined the usefulness of BKA and its analogs as PPAR gamma activators in differentiated adipocyte cells. Among the chemicals investigated, one of the BKA analogs (BKA-#2) strongly stimulated PPAR gamma and the differentiation of 3T3-L1 cells similar to pioglitazone, a positive control. Furthermore, BKA-#2 reduced the size of lipid droplets in the mature adipocyte cells. The possible modulation mechanism by BKA-#2 is discussed.

• 出版日期2017-8