Three novel quinoline alkaloids from Tetradium glabrifolium and their antibacterial activities.

Three novel quinoline alkaloids, tetradiunitiside A (1), tetradiunitiside B (2), glycohaplopine-6-O-α-L-rhamnopyranoside (3), along with eight known ones (4-11) were isolated from the fruits of Tetradium glabrifolium. Their structures were inferred by IR, 1D NMR and 2D NMR and HR-ESI-MS spectra. All the isolated compounds were evaluated for the antibacterial activities.

Chemical Constituents of Primulina eburnea (Gesneriaceae) and Their Cytotoxic Activities.

Two new ursane-type triterpenes, eburnealactones A and B (1 and 2), one new flavonoid, eburneatin A (6), and one new phenylethanoid glycoside, chiritoside D (7), along with 9 known compounds (3-5, 8-13) were isolated from the whole plant of Primulina eburnea. Their structures were elucidated by comprehensive spectroscopic data analysis (IR, UV, NMR, and HR-ESI-MS). All the compounds were evaluated for their cytotoxic activities.

Oreocharioside A-G, new acylated C-glycosylflavones from Oreocharis auricula (Gesneriaceae).

Seven new acylated C-glycosylflavones, oreocharioside A-G, together with two known compounds were isolated from the whole plant of Oreocharis auricula. Their structures were characterized by the comprehensive analysis of their NMR, IR, UV, CD spectra and HRESIMS data. All the new compounds were evaluated for the antioxidant and anti-inflammatory activities.

[Study on the association between DNA double-strand break repair gene NBS1 polymorphisms and susceptibility on lung cancer].

Objective: To study the association between DNA double-strand break repair gene NBS1 (nijmegen breakage syndrome gene) polymorphisms and the susceptibility to lung cancer.

Methods: A case-control study design was applied. PCR-RFLP was used to identify NBS1 polymorphisms among 575 lung cancer cases and 575 controls.