scholarly journals Chemical Constituents from Sambucus adnata and Their Protein–Tyrosine Phosphatase 1B Inhibitory Activities

2011 ◽  
Vol 59 (11) ◽  
pp. 1396-1399 ◽  
Author(s):  
Tatsunori Sasaki ◽  
Wei Li ◽  
Haruna Morimura ◽  
Songpei Li ◽  
Qin Li ◽  
...  
Keyword(s):  
Protein Tyrosine Phosphatase ◽  
Chemical Constituents ◽  
Tyrosine Phosphatase ◽  
Protein Tyrosine Phosphatase 1B ◽  
Protein Tyrosine ◽  
Inhibitory Activities

scholarly journals Glucose Uptake Stimulatory and PTP1B Inhibitory Activities of Pimarane Diterpenes from Orthosiphon stamineus Benth

Biomolecules ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 859 ◽  
Author(s):  
Phi Hung Nguyen ◽  
Huynh Nhu Tuan ◽  
Duc Thuan Hoang ◽  
Quoc Trung Vu ◽  
Minh Quan Pham ◽  
...  
Keyword(s):  
Glucose Uptake ◽  
Insulin Signaling ◽  
Protein Tyrosine Phosphatase ◽  
Tyrosine Phosphatase ◽  
Protein Tyrosine Phosphatase 1B ◽  
Protein Tyrosine ◽  
Orthosiphon Stamineus ◽  
Potent Inhibition ◽  
Ic50 Values ◽  
Inhibitory Activities

Seven pimarane diterpenes (1–7) were isolated from Orthosiphon stamineus Benth. by assay-guided isolation. All of the isolates possessed a 2-deoxy-2-((7-nitro-2,1,3-benzoxadiazol-4-yl)amino)-d-glucose uptake effect in 3T3-L1 adipocytes at concentrations of 5 and 10 μM. Most of them showed potent inhibition against protein tyrosine phosphatase 1B with IC50 values ranging from 0.33 to 9.84 μM. In the kinetic study, all inhibition types were exposed for the examined potencies, including mixed-competitive (1), non-competitives (3 and 5), competitive (6), and uncompetitive (7). The results suggested that O. stamineus and its pimarane diterpenes might exert the hypoglycemic effect via the insulin signaling pathway targeting inhibition of protein tyrosine phosphatase 1B (PTP1B) activity.

scholarly journals Chemical Constituents of Blumea balsamifera of Indonesia and Their Protein Tyrosine Phosphatase 1B Inhibitory Activity

2012 ◽  
Vol 7 (7) ◽  
pp. 1934578X1200700 ◽  
Author(s):  
Azis Saifudin ◽  
Ken Tanaka ◽  
Shigetoshi Kadota ◽  
Yasuhiro Tezuka
Keyword(s):  
Protein Tyrosine Phosphatase ◽  
Inhibitory Activity ◽  
Methanol Extract ◽  
Chemical Constituents ◽  
Tyrosine Phosphatase ◽  
Spectroscopic Methods ◽  
Protein Tyrosine Phosphatase 1B ◽  
Dependent Manner ◽  
Protein Tyrosine ◽  
Dose Dependent

A methanol extract of the leaves of Blumea balsamifera (L.) DC. (Asteraceae) afforded a new guaian-type sesquiterpene, epiblumeaene K (1), together with four known guaian-type sesquiterpenes (2–5), three known sesquiterpenes (6–8), and nine known flavonoids (9–17) by a combination of chromatography and preparative TLC techniques. Their structures were elucidated by extensive spectroscopic methods and comparison with the literature data. Among the isolated compounds, a known sesquiterpene, β-caryophyllene 8 R,9 R-oxide (6), exhibited a significant PTP1B inhibitory activity in a dose-dependent manner, with an IC50 value of 25.8μM (5.62μg/mL).

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