Abstract
Protein tyrosine phosphatase 1B (PTP1B) acts as a negative regulator of insulin signaling, and selective inhibition of PTP1B has served as a potential drug target for the treatment of type 2 diabetes. In the course of screening for PTP1B inhibitory natural products, the MeOH extract of the dried root of Salvia miltiorrhiza BUNGE (Labiatae) was found to exhibit significant inhibitory effect. Bioassay-guided fractionation and purification afforded three related abietane-type diterpene metabolites 1-3. Compounds 1-3 were identified as isotanshinone IIA (1), dihydroisotanshinone I (2), and isocryptotanshinone (3) mainly by analysis of NMR and MS data. Compounds 1-3 non-competitively inhibited PTP1B activity with 50% inhibitory concentration values of 11.4±0.6 μM, 22.4±0.6 μM and 56.1±6.3 μM, respectively.
Original language | English |
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Pages (from-to) | 1795-1797 |
Number of pages | 3 |
Journal | Biological and Pharmaceutical Bulletin |
Volume | 28 |
Issue number | 9 |
DOIs | |
Publication status | Published - 2005 Sept |
Externally published | Yes |
Keywords
- Dihydroisotanshinone I
- Isocryptotanshinone
- Isotanshinone IIA
- Labiatae
- Protein tyrosine phosphatase 1B (PTP1B) inhibitor
- Salvia miltiorrhiza
ASJC Scopus subject areas
- Pharmacology
- Pharmaceutical Science