Phloroglucinol Derivatives from the Fruits of Eucalyptus globulus and Their Cytotoxic Activities.

A new phloroglucinol derivative, named eucalyptin B (1), along with five related known compounds (2 - 6), was isolated from the fruits of Eucalyptus globulus. Their structures were elucidated by means of 1D- and 2D-NMR spectroscopy, with the absolute configuration of 1 determined by electronic circular dichroism (ECD) calculations. All isolated compounds (1 - 6) were evaluated for their cytotoxic activities against lung (A549), breast (4T1), and skin (B16F10) cancer cell lines.

[Study on macrophages infected with Mycobacterium tuberculosis H37Ra in vitro].

Aim: To study the production of nitric oxide and secretion of cytokines after infection of macrophages with Mycobacterium tuberculosis H37Ra.

Methods: 24 hours after infection of RAW264.7 cells with Mycobacterium tuberculosis H37Ra, the production of NO and H(2);O(2); as well as the secretion levels of IL-12 and TNF-α in the supernatants of culture were determined by Griess method, chemical method and ELISA assay respectively.

[The influence of benign prostatic hyperplasia drugs on incidence and pathology grading of prostate cancer].

Objective: To analyze the influence of benign prostatic hyperplasia (BPH) drugs on incidence and pathology grading of prostate cancer in China.

Methods: Retrospectively investigated the history of drug treatment in 1029 cases of BPH in patients from February 1998 to December 2004. According to the history of drug use, the patients were divided into 4 groups: finasteride group, alpha-receptor inhibitor group, finasteride and alpha-receptor inhibitor combination group and control group (untreated group).

Memory performance of hypercholesterolemic mice in response to treatment with soy isoflavones.

The aim of this study is to investigate the memory performance of hypercholesterolemic mice in response to soy isoflavones (SI) treatment and the mechanism involved. In this study, 64 mice were randomly divided into four groups: control, high lipid diet without SI, high lipid diet with a low SI level (50 mg/kg bw) and high lipid diet with a high SI level (100 mg/kg bw). The experimental period was 30 days.

[Study on the cytotoxicity of spleen lymphocytes and immune mechanisms in mice immunized by Mycobacterium tuberculosis H37Ra].

Aim: To explore the specific cytotoxicity of spleen lymphocytes and the immune mechanisms in mice immunized by Mycobacterium tuberculosis(MTB) H37Ra.

Methods: At the various interval (30 days, 60 days) after the mice were immunized by MTB H37Ra, BCG and PBS, the spleen lymphocytes of the immunized mice were used as the effector cells while the Sp2/0 cells expressing the secreted protein Ag85B were used as the target cells, and the cytotoxicity of spleen lymphocytes in the immunized mice was measured by MTT assay. Spleen lymphocytes were collected at 60 days after immunization and stimulated with PPD, and the expression of perforin, granzyme B on mRNA level was detected by RT-PCR.

[Advances in the chiral resolution of organophosphorus compounds by liquid chromatography].

The developments in the chiral resolution of organophosphorus compounds by liquid chromatography in recent years are reviewed. Two different approaches of separation: indirect resolution (chiral derivatization reagent method) and direct resolution (chiral mobile phase additive and chiral stationary phase), focusing on several chiral stationary phases--Pirkle type, cyclodextrin, cellulose, ligand exchange and other chiral stationary phases are presented. The possible mechanism of chiral recognition is discussed.