Analysis of Chemical Constituents in Microctis Folium by UPLC-Q-TOF-MS/MS / 中国实验方剂学杂志

Objective:To analyze the chemical constituents in Microctis Folium by ultra performance liquid chromatography-quadrupole-time-of-flight high resolution mass spectrometry （UPLC-Q-TOF-MS/MS）. Method:Waters CORTECS UPLC C₁₈ column （2.1 mm×150 mm， 1.6 μm） was used for chromatographic separation with the mobile phase of methanol （A） -0.1% formic acid solution （B） for gradient elution （0-4 min， 14%-30%A； 4-16 min， 30%-58%A； 16-25 min， 58%-78%A； 25-25.1 min， 78%-98%A； 25.1-29 min， 98%A）， the flow rate was 0.25 mL· min^-1， the injection volume was 1 μL. The electrospray ionization （ESI） was adopted for determining the chromatographic effluent under positive and negative ion modes， the main chromatographic peaks were assigned and distinguished by Q-TOF， and the scanning range was <italic>m</italic>/<italic>z</italic> 100-1 500. Result:A total of 31 chemical constituents in Microctis Folium were identified by confirmation of reference substances， literature comparison and high resolution mass spectrometry data analysis. The chemical constituent cluster was composed of 28 flavonoids （9 flavone C-glycosides， 10 flavonols and their glycosides， 8 proanthocyanidins， 1 xanthone） and 3 organic acids （caffeic acid， <italic>p</italic>-coumaric acid， ferulic acid）. Conclusion:UPLC-Q-TOF-MS/MS technique provides a simple， rapid and accurate method for the identification of chemical constituents in Microctis Folium. Flavone C-glycosides， flavonol oxyglycosides and proanthocyanidins are the main chemical constituents. The 7 proanthocyanidins are reported for the first time in this herb. In conclusion， the chemical profile of Microctis Folium is characterized and the findings are meaningful for the in-depth quality assessment and material basis clarification of Microctis Folium.

Experimental study on effect of curcumin on inhibiting injury of free radical in pulmonary fibrosis rats / 中国中药杂志

<p><b>OBJECTIVE</b>To study on the effect and mechanism of curcumin on inhibiting injury induced by free radical in pulmonary fibrosis.</p><p><b>METHOD</b>One hundred and forty-four male SD rats were randomly divided into 6 groups (24 rats in each group). Rats in the model control group, positive medicine group, and high, moderate and low curcumin groups were injected with a single dose of bleomycin by trachea, and rats in sham-model control group with same volume normal saline. One day after the injection, curcumin solution of different dosages (200,100,50 mg x kg(-1) x d(-1)) was respectively given to rats in the high, moderate and low curcumin group by daily gastrogavage, while equal volume of normal saline was given to those in the sham-model control group and model control group, and an equal volume of prednisone (0.56 mg x kg(-1) x d(-1)) was saline was given to those in positive medicine control group. On the 7, 14, 28 days, the contents of GSH-Px, SOD, MDA and iNOS in pulmonary tissues of different groups were measured.</p><p><b>RESULT</b>Curcumin can raise the content of SOD and GSH-Px and lessen the level of MDA and iNOS.</p><p><b>CONCLUSION</b>Curcumin can regulate the level of free radical in the body of rats with pulmonary fibrosis and lessen the oxidative injury of pulmonary tissues caused by free radical, in the body of rats with pulmonary fibrosis. The mechanisms of curcumin on idiopathic pulmonary fibrosis lie in adjusting the level of free radical and inhibiting the injury of lung tissue induced by free radical.</p>

Experimental study on protective effects of curcumin on exaggerated extracellular matrix accumulation of pulmonary fibrosis rats / 中国中药杂志

<p><b>OBJECTIVE</b>To study the protective effects of curcumin on exaggerated extracellular matrix accumulation of pulmonary fibrosis rats.</p><p><b>METHOD</b>One hundred and forty-four male Sprague-Dawley rats were randomly divided into 6 groups (24 rats in each group). Rats in the model control group, positive medicine group, and high, moderate and low curcumin groups were injected with a single dose of bleomycin by trachea, and rats in sham-model control group with same volume normal saline. One day after the injection, curcumin solution of different dosages (200, 100, 50 mg x kg(-1) x d(-1)) was respectively given to rats in the high, moderate and low curcumin group daily by gastrogavage, while equal volume of normal saline was given to those in the sham-model control group and model control group, and an equal volume of prednisone (0.56 mg x kg(-1) x d(-1)) was given to those in positive medicine control group. On the 7, 14, 28 days, 8 rats per treatment group were randomly killed, the levels of III-collagen, IV-collagen, laminin and hyaluronic acid in the serum were determined, the determination of hydroxyproline in lung homogenates was analyzed, and the lung was incised to make pathological sections which were stained with HE and Mallory.</p><p><b>RESULT</b>Curcumin could decreas the levels of III-collagen, IV-collagen, laminin and hyaluronic acid in the serum, and inhihit the proliferation of fibrous tissue.</p><p><b>CONCLUSION</b>Curcumin may play its therapetuic role by leveling down the content of extracellular matrix in rats with pulmonary fibrosis induced by bleomycin.</p>