Two rare new chiratane-type triterpenoids, kouitchenoids A and B (1, 2), together with oleanolic acid (3) and ursolic acid (4), were isolated from ethanol extract of Swertia kouitchensis. The new structures were determined by the analysis of MS and NMR data. In addition, compounds 1-4 showed moderate inhibitory activity against the α-glucosidase (with IC₅₀ values ranging from 1,812 to 2,027 μM).

Tuberculosis still remains a leading cause of death in the world. Currently considerable interest in natural products and their derivatives in the area of drug research for multidrug resistant tuberculosis (MDR-TB). The present investigation focused on identification, isolation, characterization of lead constituents and to determine the antitubercular activity of their enriched fractions and is...

Tuberculosis still remains a leading cause of death in the world. Currently considerable interest in natural products and their derivatives in the area of drug research for multidrug resistant tuberculosis (MDR-TB). The present investigation focused on identification, isolation, characterization of lead constituents and to determine the antitubercular activity of their enriched fractions and is...

The host immune system is the first line of host defense, consisting mainly of innate and adaptive immunity. Immunity must be maintained, orchestrated, and harmonized, since overactivation of immune responses can lead to inflammation and autoimmune diseases, while immune deficiency can lead to infectious diseases. We investigated the regulation of innate and adaptive immune cell activation by A...

To establish a method for determining ursolic acid content in Patrinia scabiosifolia Fisch. ex Trevir.; and to investigate the inhibitory effect of Patrinia scabiosifolia Fisch. ex Trevir. extract on in vitro cultured human cervical carcinoma Hela cells. HPLC with Agilent XBP-C18 column (4.6 mm × 250 mm, 5 μm) was used. Mobile phase was acetonitrile-methanol-0.5% ammonium acetate solution (68:1...

Ursolic acid (UA), a pentacyclic triterpenoid, is known to exert antitumor activity in breast, lung, liver and colon cancers. Nonetheless, the underlying mechanism of ursolic acid in prostate cancer cells still remains unclear. In the present study, we report the chemotherapeutic effects of ursolic acid as assessed using in vitro and in vivo models. Treatment of human prostate cancer cells (LNC...

1 Regional Innovation Center for Dental Science and Engineering, Chosun University, 309 Pilmun-daero, Dong-gu, Gwangju, 501-759, Korea 2 Department of Biosystems Machinery Engineering, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon, 305-764, Korea 3 Department of Crop Science, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon, 305-764, Korea * Corresponding author...

Nano-sized polymeric amphiphilic micelle was prepared using the hydrophilic polysaccharide, oligo-chitosan, and hydrophobic side chains, ursolic acid which assists the skin penetration, because the amphiphilic polysaccharide nanoparticles have been widely investigated as the carriers for active agents such as small molecules, proteins, peptides, and nucleic acids due to many advantages in prote...