Bistinospinosides A and B, Dimeric Clerodane Diterpene Glycosides from Tinospora sagittata.[Pubmed: 28836430]

Two dimeric clerodane diterpene glycosides, namely, bistinospinosides A (1) and B (2), were isolated from the roots of Tinospora sagittata. Their structures were elucidated by extensive spectroscopic data interpretation. The compounds feature an unusual 1,4-epoxycyclohexane ring in their structures and may be biosynthetically constructed via an intermolecular Diels-Alder [4+2] cycloaddition from the corresponding clerodane diterpene. The compounds were evaluated in a nitric oxide inhibitory assay using J774.1 macrophage-like cells.

Two New Clerodane Diterpenes from Tinospora sagittata.[Pubmed: 27657021]

None

In vitro and in vivo bactericidal activity of Tinospora sagittata (Oliv.) Gagnep. var. craveniana (S.Y.Hu) Lo and its main effective component, palmatine, against porcine Helicobacter pylori.[Pubmed: 27576439]

Tinospora sagittata (Oliv.) Gagnep. var. craveniana (S.Y.Hu) Lo (TSG) is a traditional Chinese herb that has been used for the treatment of upper respiratory tract infection and has anti-bacterial and anti-ulcer activity. Our study investigated the bactericidal effects of TSG and its major component, palmatine, against a Helicobacter pylori (H. pylori) strain isolated from pig and the standard strain H. pylori SS1 in vitro and in vivo.

Clerodane-type diterpenoids from tuberous roots of Tinospora sagittata (Oliv.) Gagnep.[Pubmed: 26924160]

Three new clerodane type diterpenoids (2-4), together with one known analogues (1), were isolated from the tuberous roots of Tinospora sagittata (Oliv.) Gagnep. Compound 3 is an unusual clerodane diterpenoid with the carbonyl functionality at C-3, which represents the first example from this diterpenoid compounds class. The structures were established on the basis of spectroscopic data interpretation. The absolute configuration of 1 was determined for the first time by single-crystal X-ray diffraction analysis with CuKα irradiation. These isolates were evaluated for their cytotoxic activities against five human cancer cell lines and inhibitory activities on LPS-induced NO production in RAW264.7 cells.

New clerodane diterpenes from Tinospora sagittata var. yunnanensis.[Pubmed: 24634023]

Four new clerodane diterpenes, namely sagittatayunnanosides A-D (1-4), were isolated from the roots of Tinospora sagittata var. yunnanensis, together with two known compounds, tinospinoside C (5) and tinospinoside E (6). The structures of the four new compounds were well elucidated by extensive analyses of the MS, IR, and 1D and 2D NMR data. The cytotoxic and antifouling activities of compounds 1-6 were evaluated.

Tinospinosides D, E, and tinospin E, further clerodane diterpenoids from Tinospora sagittata.[Pubmed: 23036973]

Chemical investigation on the roots of Tinospora sagittata resulted in the isolation of three novel cis-clerodane diterpenoids, tinospinosides D, E, and tinospin E, together with two known compounds, columbin and columbin glucoside, and their structures were determined by extensive spectroscopic analyses, chemical reactions and computer-assisted calculations. The inhibitory activity of the isolated compounds and their chemical derivatives on nitric oxide production in lipopolysaccharide and interferon-γ activited J774.1 macrophage-like cells was also evaluated.

Clerodane diterpenoids from Tinospora sagittata (Oliv.) Gagnep.[Pubmed: 21969117]

Three new clerodane diterpene glycosides, tinospinosides A (1), B (2), and C (3) were isolated from the roots of Tinospora sagittata (Oliv.) Gagnep. Their structures were determined to be (2 S,4a R,6a R,9 R,10a S,10b S)-2-(3-furanyl)-9-( β-D-glucopyranosyloxy)-1,4,4a,5,6,6a,9,10,10a,10b-decahydro-6a,10b-dimethyl-4-oxo-2H-naphtho[2,1-c]pyran-7-carboxylic acid methyl ester (1), (2 S,4a S,6a R,9 R,10a R,10b S)-2-(3-furanyl)-9-( β-D-glucopyranosyloxy)-1,4,4a,5,6,6a,9,10,10a,10b-decahydro-4a-hydroxyl-6a,10b-dimethyl-4-oxo-2H-naphtho[2,1-c]pyran-7-carboxylic acid methyl ester (2) and (2 S,4a R,6a R,9 R,10a R,10b S)-2-(3-furanyl)-9-( β-D-glucopyranosyloxy)-1,4,4a,5,6,6a,9,10,10a,10b-decahydro-4a-hydroxyl-6a,10b-dimethyl-4-oxo-2H-naphtho[2,1-c]pyran-7-carboxylic acid methyl ester (3), by various spectroscopic analyses, chemical reactions, and computer-assisted calculations. The inhibitory activities of NO production by these compounds and their chemical derivatives in lipopolysaccharide and TNF γ-activated macrophage-like cell line J774.1 were tested. Tinospin A, 12- EPI-tinospin A, tinospinoside B, and tinospinoside C showed inhibitory activities of NO production with the IC(50) values of 162, 182, 290, and 218 µM, respectively.

A novel lignan glycoside with antioxidant activity from Tinospora sagittata var. yunnanensis.[Pubmed: 21942471]

A novel lignan glysocide, namely sagitiside A (1), together with two known ones, (+)-lyoniresinol-2α-O-β-D-glucopyranoside (2) and (+)-5'-methoxyisolariciresinol 3α-O-β-D-glucopyranoside (3), was isolated from the 95% ethanol extract of dry roots of Tinospora sagittata var. yunnanensis. The structure of the new compound (1) was determined based on MS, 1D and 2D NMR spectral data. Compounds 1-3 showed antioxidant activity with EC(50) values 55, 75 and 80 µM by 1,1-diphenyl-2-picryhydrazyl (DPPH) radical-scavenging assay.