title: Selaginellin and biflavonoids as protein tyrosine phosphatase 1B inhibitors from Selaginella tamariscina and their glucose uptake stimulatory effects.
abstract: As part of an ongoing search for new antidiabetic agents from medicinal plants, the methanol extract of the aerial parts of Selaginella tamariscina was found to possess stimulatory effect on glucose uptake in 3T3-L1 adipocyte cells. Thus, bioassay-guided isolation of this active extract yielded two new compounds (1 and 2) along with five known biflavonoids (3-7). Their structures were elucidated by extensive analysis of spectroscopic and physicochemical data. The absolute configuration of compound 2 was determined by specific rotation and CD data analysis. All isolates exhibited potent inhibitory effects on PTP1B enzyme with IC50 values ranging from 4.5±0.1 to 13.2±0.8μM. Furthermore, the isolates (1-7) showed significant stimulatory effects on 2-NBDG uptake in 3T3-L1 adipocyte cells. Of these, compounds (1, 6, and 7) which exhibited mixed-competitive inhibition modes against PTP1B, showed potent stimulatory effects on 2-NBDG uptake. This result indicated the potential of these biflavonoids as lead molecules for development of antidiabetic agents and the beneficial use of S. tamariscina against hyperglycemia.
authors.affiliation: College of Pharmacy, Drug Research and Development Center, Catholic University of Daegu, Gyeongsan 712-702, Republic of Korea; Institute of Natural Products Chemistry, Vietnam Academy of Science and Technology, 18-Hoang Quoc Viet, Hanoi, Viet Nam.
authors.forename: Phi-Hung
authors.initials: PH
authors.lastname: Nguyen
authors.affiliation: College of Pharmacy, Drug Research and Development Center, Catholic University of Daegu, Gyeongsan 712-702, Republic of Korea.
authors.forename: Da-Jung
authors.initials: DJ
authors.lastname: Ji
authors.affiliation: Department of Food Science & Nutrition, Pukyong National University, 599-1 Daeyeon-3 Dong, Namgu, Busan 608-737, Republic of Korea.
authors.forename: Yu-Ran
authors.initials: YR
authors.lastname: Han
authors.affiliation: Department of Food Science & Nutrition, Pukyong National University, 599-1 Daeyeon-3 Dong, Namgu, Busan 608-737, Republic of Korea.
authors.forename: Jae-Sue
authors.initials: JS
authors.lastname: Choi
authors.affiliation: Department of Oriental Medicine Resources, Mokpo National University, Muan-gun 534-729, Republic of Korea.
authors.forename: Dong-Young
authors.initials: DY
authors.lastname: Rhyu
authors.affiliation: College of Pharmacy, Drug Research and Development Center, Catholic University of Daegu, Gyeongsan 712-702, Republic of Korea. Electronic address: bsmin@cu.ac.kr.
authors.forename: Byung-Sun
authors.initials: BS
authors.lastname: Min
authors.affiliation: College of Pharmacy, Drug Research and Development Center, Catholic University of Daegu, Gyeongsan 712-702, Republic of Korea. Electronic address: woomh@cu.ac.kr.
authors.forename: Mi-Hee
authors.initials: MH
authors.lastname: Woo
mesh_terms: D041721:3T3-L1 Cells; D009327:4-Chloro-7-nitrobenzofurazan / Q000031:analogs & derivatives / Q000378:metabolism; D000818:Animals; D044946:Biflavonoids / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*; D001692:Biological Transport / Q000187:drug effects; D001713:Biphenyl Compounds / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*; D002470:Cell Survival / Q000187:drug effects; D003512:Cyclohexanones / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*; D003847:Deoxyglucose / Q000031:analogs & derivatives / Q000378:metabolism; D005947:Glucose / Q000378:metabolism; D006801:Humans; D007004:Hypoglycemic Agents / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*; D000432:Methanol; D051379:Mice; D010936:Plant Extracts / Q000737:chemistry; D010946:Plants, Medicinal; D054562:Protein Tyrosine Phosphatase, Non-Receptor Type 1 / Q000037:antagonists & inhibitors* / Q000737:chemistry; D056910:Republic of Korea; D032503:Selaginellaceae / Q000737:chemistry*; D012997:Solvents
chemical_list: D044946:Biflavonoids; D001713:Biphenyl Compounds; D003512:Cyclohexanones; D007004:Hypoglycemic Agents; D010936:Plant Extracts; D012997:Solvents; D003847:Deoxyglucose; C516607:PTPN1 protein, human; D054562:Protein Tyrosine Phosphatase, Non-Receptor Type 1; D009327:4-Chloro-7-nitrobenzofurazan; D005947:Glucose; C098340:2-(N-(7-nitrobenz-2-oxa-1,3-diazol-4-yl)amino)-2-deoxyglucose; D000432:Methanol
keywords: 2-NBDG; Biflavonoids; PTP1B inhibitors; Selaginella tamariscina