Protein tyrosine phosphatase 1B (PTP1B) inhibitory constituents from the aerial parts of Tradescantia spathacea Sw.

Abstract

Inhibitors of protein tyrosine phosphatase 1B (PTP1B) are promising agents for the treatment of type 2 diabetes and obesity. The bioactivity-guided isolation led to the separation of two new compounds, (±)-tradescantin (13) and tradescantoside (16), along with fourteen known compounds (1-12, 14, and 15) from the aerial parts of Tradescantia spathacea Sw. (Commelinaceae). Their chemical structures were elucidated by spectroscopic methods as well as by comparing with those reported in the literature. The isolated compounds (1-16) were then examined for their inhibitory activity toward PTP1B. The results indicated that compounds 2, 6, 8, and 12 possessed potent inhibition with IC50 values of 7.82±0.79, 6.80±0.89, 4.55±0.92, and 6.38±0.14 μM, respectively. Kinetic study of compounds 2, 6, 8, 12, 13, and 16 was conducted and the structure-activity relationships of the isolated compounds (1-16) were also discussed herein. To the best of our knowledge, all the isolates were separated for the first time from this plant.

• Authors: Quoc Hung Vo, Phi Hung Nguyen, Bing Tian Zhao, Md Yousof Ali, Jae Soo Choi, Byung Sun Min, Thi Hoai Nguyen, Mi Hee Woo
• Journal: Fitoterapia (Fitoterapia) Vol. 103 Pg. 113-21 (Jun 2015) ISSN: 1873-6971 [Electronic] Netherlands
• PMID: 25810314 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
• Copyright: Copyright © 2015 Elsevier B.V. All rights reserved.

Chemical References

• Caffeic Acids
• Enzyme Inhibitors
• Glucosides
• Phenylbutyrates
• Protein Tyrosine Phosphatase, Non-Receptor Type 1

Topics

• Caffeic Acids (chemistry, isolation & purification)
• Enzyme Inhibitors (chemistry, isolation & purification)
• Glucosides (chemistry, isolation & purification)
• Inhibitory Concentration 50
• Molecular Structure
• Phenylbutyrates (chemistry, isolation & purification)
• Plant Components, Aerial (chemistry)
• Protein Tyrosine Phosphatase, Non-Receptor Type 1 (antagonists & inhibitors)
• Tradescantia (chemistry)