Simultaneous determination of five alkaloids from Rauvolfia vomitoria in rat plasma by LC-MS/MS: Application to a comparative pharmacokinetic study in normal and type 2 diabetic rats.

Rauvolfia vomitoria is widely distributed in the tropical regions of Africa and Asia, and has been used in traditional folk medicine in China. Indole alkaloids were found to be major bioactive components, while the effects of diabetes mellitus on the pharmacokinetic parameters of the components have not been reflected in vivo. In this study, an efficient and sensitive liquid chromatography-tandem mass spectrometry method was developed and validated for the simultaneous determination of five ingredients of R. vomitoria in rats. Detection was implemented in multiple-reaction-monitoring mode with an electrospray positive-ionization source. Validation parameters were all in accordance with the current criterion. The established method was effectively employed to compare the pharmacokinetic behaviors of five alkaloids (reserpine, yohimbine, ajmaline, ajmalicine, and serpentine) between normal and type 2 diabetic rats. The single-dose pharmacokinetic parameters of the five alkaloids were determined in normal and diabetic rats after oral administration of 100 and 200 mg/kg body weight. The results indicated that diabetes mellitus significantly altered the pharmacokinetic characteristics of yohimbine, ajmaline, and ajmalicine after oral administration in rats. This is an attempt to provide some evidence for clinicians that may serve as a guide for the use of antidiabetic medicine in clinical practice.

Development of Improved Version of Quality of Life Assessment Instrument for Lung Cancer Patients Based on Traditional Chinese Medicine (QLASTCM-Lu).

OBJECTIVE: To develop an improved version of the Quality-of-Life Assessment instrument for Lung Cancer Patients Based on Traditional Chinese Medicine (QLASTCM-Lu) and to evaluate its psychometric property. METHODS: The structured group method and the theory in developing rating scale were employed to revise the preliminary scale. The psychometric property (reliability, validity, and responsiveness) of the established QLASTCM-Lu (modified) were evaluated by quality of life data measured in 100 lung cancer patients. Statistical analyses were made accordingly by way of correlation analysis, factor analysis and paired t-test. RESULTS: The internal consistency reliability of the overall scale and all domains was from 0.80 to 0.94. Correlation and factor analyses demonstrated that the scale was good in construct validity. The criterion validity was formed with European Organization for Research and Treatment of Cancer-Quality of Life Questionnaire-Lung Cancer (EORTC QLQ-LC43) as the criterion. Statistically significant changes were found apart from such domain as "mental condition" and "social function", with the standardized response means being close to those of QLQ-LC43. CONCLUSION: QLASTCM-Lu (modified) could be used to measure the quality of life of lung cancer patients with good reliability, validity and a certain degree of responsiveness.

[Determination of six active ingredients in different parts of Belamcanda chinensis and Iris tectorum and their anti-inflammatory activity].

In order to explore the anti-inflammatory activity and active ingredient basis from the leaves of the Belamcanda chinensis and Iris tectorum, we established an HPLC method for simultaneous determination of six anti-inflammatory active ingredient contents in the root of the B. chinensis and I. tectorum as well as their leaves with different dry methods, and the anti-inflammatory effects of the extract were studied by the mouse ear swelling experiment. The HPLC analysis was performed on an Agilent WondaSil© C18-WR(4.6 mm×250 mm，5 µm)，with isocratic elution of acetonitrile-0.1% ortho-phosphoric acid solution at a flow rate of 1. 0 mL·min⁻¹ and the detection was carried out at 265 nm. The chemical compositions of the B. chinensis and I. tectorum are similar but the contents of them are obviously different. Both rhizome and leaf extract of B. chinensis and I. tectorum had inhibitory effects on inflamed mice induced by dimethylbenzene and had anti-inflammatory effects by animal experiment, which could lay the material and active foundation for the development of the non-medicinal parts of the B. chinensis and I. tectorum.

Cytotoxic ent-kaurane diterpenoids from Isodon nervosus.

Four new ent-kaurane diterpenoids, rabdonervosins G-J (1-4, resp.), were isolated from the leaves and stems of Isodon nervosus. Their structures were elucidated by extensive spectroscopic analyses, including 1D-, 2D-NMR and HR mass spectra. Compound 2 showed potent cytotoxicity against the HepG2 and PC-9/ZD cell lines with IC50 values of 2.36 and 6.07 µM, respectively, and compound 3 exhibited cytotoxicity against the HepG2 and CNE2 cell lines with IC50 values of 8.64 and 9.77 µM, respectively.

[Effect of acupoint injection on erythropoietin resistance in patients with chronic renal failure].

OBJECTIVE: To compare the effect on erythropoietin (Epo) resistance between acupoint injection and subcutaneous injection of rHuEpo in patients with chronic renal failure (CRF). METHODS: Thirty-eight cases were randomly divided into two groups, 19 cases in each one. In subcutaneous injection group (control group), subcutaneous injection of rHuEpo was administered, 3 times a week, lasting 2 months. In acupoint group (observation group), rHuEpo was injected on unilateral Shenshu (BL 23) and Zusanli (ST 36), one point was chosen each time, the bilateral acupoints were injected alternatively, 3 times a week, for 2 months. Meanwhile, a normal control group of 19 healthy persons was set up. The levels of CRP, IL-6, TNF-alpha, Scr, BUN, Hb, Hct and SF were observed. RESULTS: Before treatment, the values of CRP, IL-6 and TNF-alpha in two groups were all higher than those in normal control group (all P < 0.01). After treatment for 2 months, the values of CRP, IL-6,TNF-alpha, Scr and BUN in two groups decreased apparently and those of Hb, Hct and SF increased obviously, indicating statistic significant differences as compared with the values before treatment separately (P < 0.05, P < 0.01). In comparison between two groups after treatment, every index above in observation group was improved much significantly (P < 0.05, P < 0.01). CONCLUSION: Acupoint injection of rHuEpo at Zusanli (ST 36) and Shenshu (BL 23) increases significantly the values of Hb, Hct and SF, and decreases apparently the values of BUN, Scr and inflammatory factors, such as CRP, IL-6 and TNF-alpha as compared with subcutaneous injection. Acupoint injection improves Epo resistance and enhances Epo efficacy via alleviating micro-inflammatory state of the body.