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ObjectiveTo clarify the spatial distribution characteristics of medicinal plant resources in Gansu province， analyze the causes， changing trends， and driving factors of the spatial differentiation， and thus lay a scientific basis for the rational development and sustainable development of medicinal plant resources in this province. MethodBased on the data of The Fourth National Survey of Chinese Medicine Resources， the richness and spatial distribution difference of medicinal plant resources in 87 counties （districts） of Gansu province were analyzed via the global spatial autocorrelation analysis， trend surface analysis， local spatial autocorrelation analysis， and hotspot analysis. Moreover， the correlation of vegetation type， soil texture， annual average temperature， annual average precipitation， and altitude with the spatial distribution pattern of the medicinal plant resources was discussed. ResultCounties （districts） with high or low richness of medicinal plant resources in Gansu province were respectively clustered together. To be specific， counties （districts） with high richness of the medicinal resources were mainly in southeastern Gansu， while those with low richness in northwestern Gansu. The leading driving factors affecting the cold and hot spots included vegetation type， soil texture， and average annual rainfall. ConclusionThe species richness of medicinal plant resources in Gansu province rises from west to east and from north to south. The natural driving factors are the key to the diversity and spatial distribution pattern of medicinal plant resources， which show significant influence on them.
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OBJECTIVE:To study the protective effects and the mechanism of Rabdosia serra water extract(RWE)on hepatic fibrosis(HF)induced by carbon tetrachloride(CCl4)in rats. METHODS:Sixty male SD rats were randomly divided into normal group,model group,colchicine group(0.12 mg/kg),and RWE low-dose,medium-dose and high-dose groups(4,8,16 g/kg,by crude drug),with 10 rats in each group. Except for intraperitoneal injection of olive oil for normal group,other groups were given 40% CCl4olive oil solution intraperitoneally to induce HF model. Since the first day of modeling,each treatment group was given relevant medicine (10 mL/kg) intragastrically, while normal group and model group were given constant volume of water intragastrically,once a day,for consecutive 6 weeks. After medication,biochemical process or ELISA were used to determine the contents of ALT,AST,HA,LN,PCⅢ and Ⅳ-C in serum,the activities or contents of SOD,GSH-Px,MDA,TNF-α,IL-6 and IL-1β in liver tissue. Pathological changes of liver tissue in rats were observed by HE staining. The expression of α-SMA and TGF-β1 in liver tissue were detected by Western blot. RESULTS:Compared with normal group,the contents of ALT,AST,LN,HA,PCⅢ and Ⅳ-C in serum,the contents of MDA,TNF-α,IL-6 and IL-1β in liver tissue were all increased significantly in model group (P＜0.01);the activities of SOD and GSH-Px in liver tissue were decreased significantly(P＜0.01). Liver fibrosis was obvious, and the relative expression of α-SMA and TGF-β 1were increased significantly (P＜0.01). Compared with model group,the contents of ALT,AST,HA,LN,PCⅢ and Ⅳ-C in serum as well as the contents of MDA,TNF-α and IL-6 in liver tissue in colchicines group and RWE groups,the contents of IL-1 β in liver tissue of rats in colchicines group,RWE medium-dose and high-dose groups were all decreased significantly (P＜0.05 or P＜0.01). The activities of SOD and GSH-Px in liver tissue of rats were increased significantly in colchicines group and RWE groups(P＜0.05 or P＜0.01). The fibrosis degree of liver tissue was significantly reduced, while the relative expression of α-SMA and TGF-β 1decreased significantly (P＜0.01). CONCLUSIONS:RWE can protect CCl4-induced HF model rats,the mechanism of which may be associated with regulating lipid metabolism,relieving liver lipid peroxidation injury and anti-oxidative stress response,inhibiting the release of inflammatory factors and the expression of TGF-β1.
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Aim Based on the effect of total flavonoids extracted from Polygonum perfoliatum L.(TFP) against dimethylnitrosamine(DMN)-induced hepatic fibrosis(HF), to investigate the anti-fibrotic mechanism of TFP.Methods Ninety SD rats were divided into normal group, model group, colchicines(0.1 mg·kg-1) group, and TFP(200, 100, 50 mg·kg-1) group.Except the rats of normal group, other rats were injected intraperitoneally with volume fraction 0.5% DMN solution(2 mL·kg-1) for eight weeks, once every two days.From the first day of modeling, each administration group was given the corresponding dose of drugs to intervene, and the normal group and model group were given an equal volume of solvent, once a day.At the end of the eighth week, the blood and liver tissues were collected.Liver tissue was taken at a fixed position, and the degree of liver tissue was observed by HE staining.The contents of serum ALT, AST, SOD and MDA were measured using colorimetric method;the levels of serum HA, LN, PCⅢand Ⅳ-C were detected using enzyme-linked immunosorbent assay(ELISA);the levels of TNF-α, IL-1β and IL-6 in liver tissues were detected by ELISA;the expression of α-SMA, TGF-β1, p-JAK2 and p-STAT3 were detected by Western blot.Results Compared with the model group, TFP(200, 100, 50 mg·kg-1) could improve the liver tissue lesions, reduce the expression of ALT, AST, HA, LN, PCⅢ, IV-C and MDA, increase SOD activity, reduce the levels of TNF-α, IL-1β and IL-6, and inhibit the expression of α-SMA, TGF-β1, JAK2, STAT3, p-JAK2 and p-STAT3.Conclusion TFP could inhibit DMN-induced HF of rats, which may be involved with antioxidant and inhibiting expression of TGF-β1, JAK2/STAT3 signaling pathway and inflammatory response.
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Aim To study the effects of Dicliptera chinensis polysaccharide(DCP)on alcoholic fatty liver disease(AFLD)in rats based on anti-inflammation and antioxidation.Methods 60 rats were randomly divid-ed into six groups:control group,model group,silybin group and DCP of high,medium and low dose groups. The control group was fed with normal diet, other groups were fed with high sugar and high fat diet,and given 5% alcohol 5 mL·kg-1 by gavage.The alcohol consistency increased 5%every week until AFLD mod-els in rats were made after 7 weeks.Except control group,other groups were fed with high sugar and high fat diet,and given 35% alcohol 5 mL · kg-1 and DCP.All rats were killed after five weeks,and blood and liver tissues were collected.The activity of alanine aminotransaminase (ALT),aspartate aminotransferase (AST ), alkaline phosphatase (AKP ), triglyceride (TG),total cholesterol (TC ),low-density lipoprotein cholesterol(LDL-C)and high-density lipoprotein cho-lesterol(HDL-C)in serum were detected by using bio-chemical method. The contents of malondialdehyde (MDA),superoxide dismutase (SOD),reduced gluta-thione(GSH)in liver tissues were detected.The con-tents of tumor necrosis factor-α(TNF-α),interleukin-6 (IL-6 )and transforming growth factor-β1 (TGF-β1 ) were determined by enzyme-linked immunosorbent as-say(ELISA)in liver tissues.The liver tissues were ob-tained and histologic analysis was done through HE. Results DCP reduced the activity or content of ALT, AST,AKP,TG,TC,LDL-C,HDL-C,TNF-α,IL-6, TGF-β1 in serum and liver tissues of rats(P<0.05 ), and increased the activity or content of HDL-C,SOD and GSH (P<0.05 ).DCP could remarkably inhibit the NF-κB expression in liver tissues(P<0.01 ).The pathological examination indicated that DCP could ob-viously alleviate the inflammation and fat denaturation of the liver cells.Conclusion DCP can inhibit the de-velopment of AFLD.The mechanism may be related to antioxidation,free radical scavenging, inhibition of lipidperoxidation,anti-inflammation,and inhibition of the TGF-β1 and NF-κB expression.