title: Anti-diabetic activity of active fractions of Stereospermum tetragonum DC and isolation of active principles.
abstract: OBJECTIVE
  To identify the active principles, determine the anti-diabetes activity of fraction of Stereospermum tetragonum root.
  
  
  METHODS
  The efficacy was evaluated in streptozotocin induced type 2 diabetic rats and the anti-hyperglycemic activity was studied by glucose tolerance test. The major active compounds were isolated by solvent fractionation and chromatographic techniques and characterized with spectral data.
  
  
  RESULTS
  The active fraction of S. tetragonum showed presence of anti-diabetes mellitus activity in type-2 diabetic rats. It did not significantly influence insulin release from cultured islets. Two active principles (active at 2 mg/kg dose) were isolated and characterized with spectral data. One of them was identified as an iridoid type glycoside and the other one was a lapachol like compound (derivative of naphthoquinone).
  
  
  CONCLUSIONS
  Two active principles from the anti-diabetes fraction of S. tetragonum root were isolated and identified as an iridoid glycoside and a naphthoquinone derivative.
authors.affiliation: Division of Phytochemistry and Phytopharmacology, Tropical Botanic Garden and Research Institute, Palode, Thiruvananthapuram 695562, India.
authors.forename: Renjit
authors.initials: R
authors.lastname: Bino Kingsley
authors.forename: Manisha
authors.initials: M
authors.lastname: Mishra
authors.forename: Pemaiah
authors.initials: P
authors.lastname: Brindha
authors.forename: Appian
authors.initials: A
authors.lastname: Subramoniam
keywords: Anti-diabetes mellitus; Iridoid glycoside; Naphthoquinone derivative; Stereospermum tetragonum
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