Potential hepatoxicity risk of the shell of Herpetospermum caudigerum Wall in rats based on 1H-NMR metabonomics.

The Herpetospermum caudigerum Wall (HCW) is a traditional Tibetan medicine and is widely used in clinical practice. However, the shell of the HCW (SHCW) has rarely been studied, and some researchers have suggested that the SHCW may be toxic. Therefore, in this study, SHCW was administered to rats at two doses (0.1 and 0.33 g/kg) once a day for 21 days. The hepatic stimuli induced by SHCW in rats were investigated for the first time by 1H-NMR-based metabolomics combined with histopathological observation and biochemical detection. Histopathological sections showed a certain degree of hepatocyte edema and hepatic sinus congestion in the liver tissue of the rats in the drug-administered group. Serum biochemical indicators revealed a significant increase in ALT, AST, and MDA, and a significant decrease in SOD. Metabolomic results showed that the metabolites in rats were changed after gavage administration of extracts from SHCW. By multivariate statistical analysis and univariate analysis, it was found that SHCW could cause the disorder of energy metabolism, oxidative stress and amino acid metabolism in rats, leading to liver damage. This comprehensive metabolomics approach demonstrates its ability to describe the global metabolic state of an organism and provides a powerful and viable tool for exploring drug-induced toxicity or side effects.

Hepatoprotection of Herpetospermum caudigerum Wall. against CCl4-induced liver fibrosis on rats.

ETHNOPHARMACOLOGICAL RELEVANCE: Herpetospermum caudigerum Wall. (HCW) is a traditional Tibetan medicine, which has been used to ameliorate liver injuries in the folk. AIM OF THE STUDY: Liver fibrosis has been recognized as a major lesion of the liver that leads to liver cirrhosis/hepatocarcinoma and even to death in the end. This study aims to demonstrate the protective effect of HCW against CCl4-induced liver injury in rats and to explore the underlying mechanisms. MATERIALS AND METHODS: Hepatic fibrosis was induced by intraperitoneal injection of CCl4. Liver function markers, fibrosis markers, serum anti-oxidation enzymes as well as elements levels were determined. Serum and liver tissues were subjected to NMR-based metabolomics and multivariate statistical analysis. RESULTS: HCW could significantly reduce the elevated levels of fibrosis markers such as hyaluronidase, laminin, Type III procollagen and Type IV collagen in the serum, improve the activities of the antioxidant enzymes, and effectively reverse the abnormal levels of elements in liver fibrosis rats. Correlation network analysis revealed that HCW could treat liver fibrosis by ameliorating oxidative stress, repairing the impaired energy metabolisms and reversing the disturbed amino acids and nucleic acids metabolisms. CONCLUSION: This integrated metabolomics approach confirmed the validity of the traditional use of HCW in the treatment of liber fibrosis, providing new insights into the underlying mechanisms.

Hepatoprotective effect of Herpetospermum caudigerum Wall. on carbon tetrachloride-induced hepatic fibrosis in rats.

Tibetan medicine Herpetospermum caudigerum Wall. (HCW) has long been employed to treat hepatitis, inflammatory diseases and jaundice according to the records of "The Four Medical Tantras" in China. This study was investigated to explore the protective effects of HCW on hepatic fibrosis and the possible mechanism in a rat model. Hepatic fibrosis was established by intragastric administration of 3 ml/kg carbon tetrachloride (CCl4 ) twice a week for 6 weeks. CCl4 -treated rats were received HCW (1 and 3 g/kg/d) and silymarin (0.1 g/kg/d) from 3 to 6 weeks. The results showed that HCW could significantly decrease the levels of AST, ALT, HA, LN, PCIII, Col IV, TNF-α, IL-1ß and IL-6. Moreover, HCW could effectively inhibit collagen deposition and reduce the pathological damage. Analysis experiments finally exhibited that HCW was able to markedly inhibit hepatic fibrosis by modulating the expressions of NF-κB p65, IκBα, Samd3 and TGF-ß1 proteins. Therefore, our results suggest that HCW has hepatoprotective activity against CCl4 -induced hepatic fibrosis in rats by regulating the inflammatory responses.

[Study on methodology for evaluating clinical efficacy of traditional Tibetan medicine].

The evaluation on clinical efficacy of traditional Tibetan medicine (TTM) is an important scientific subject during the development of TTM. Firstly, the authors introduced the current situations and problems in evaluation on clinical efficacy of traditional Tibetan medicine both at home and abroad in this study. Secondly, they compared the similarities and differences between TTM and traditional Chinese medicine (TCM) in evaluation on clinical efficacy, define their differences in details but not in nature, and proposed that TTM could selectively learn TCM's experiences in clinical research and build a specific methodology system for evaluation on clinical efficacy according to its own characteristics. Thirdly, they discussed the methodological challenges in evaluation on clinical efficacy of TTM, including the pending clinical research guidelines and disease diagnosis standards according to its own characteristics. Finally, they propound some suggestions for promoting the evaluation on clinical efficacy of TTM, including the comprehensive application of multiple research methods, overall research-based evaluation on efficacy of TTM complex intervention and selection of accepted and objective outcome indexes for efficacy evaluation.

[Determination of eight heavy metals and two main ingredients of safflower planted in linzhi of Tibetan].

The eight heavy metals and two essential constitutes of safflowers planted in linzhi which lies in Southern Tibet were analyzed by ICP-MS and by HPLC respectively. Heavy metals of safflower in the region were at the lower level and the essential constitutes were at the higher level. The better quality of safflower here was assisted by the excellent climate in tibet.