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Objective:To study the serum pharmacochemistry of Periploca forrestii rhizomes,and to investigate the pharmacological material basis of extract of P. forrestii rhizomes in rats. Method:Rapid identification of constituents absorbed into blood was carried out by UPLC-Q-TOF-MS,according to retention time,accurate relative molecular mass and standard substance comparison,these constituents were identified and speculated by Data Analysis,Metabolite Detect and other softwares,then preliminary determination of constituents absorbed into blood of rats after oral administration of extract of P. forrestii rhizomes was investigated. Result:Totally 17 constituents absorbed into blood were detected in serum,ten of them were prototype constituents and the other were metabolites.Seven of the prototypes were identified as 5-O-caffeoylquinic acid,4-O-caffeoylquinic acid,3-O-caffeoylquinic acid,3,4-di-O-caffeoylquinic acid,3,5-di-O-caffeoylquinic acid,4,5-di-O-caffeoylquinic acid and periplocin. Conclusion:These constituents absorbed into blood may be substances that act directly in vivo of P. forrestii rhizomes,and it is helpful to clarify pharmacological material basis and mechanism of this herb.
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Objective:To explore the effect of trillin on oxidative stress response and nuclear factor E2-related factor 2/antioxidant response element (Nrf2/ARE) pathway in rats after spinal cord injury (SCI). Methods:A total of 108 male Sprague-Dawley rats were randomly divided into sham group (n = 36), model group (n = 36) and trillin group (n = 36), each group was divided into one day, three days and seven days subgroups, with twelve rats in each subgroup. The SCI model was established by modified Allen's heavy strike method in the model group and the trillin group, but no obvious injury in the sham group. The trillin group was given trillin 200 mg/kg every day, and the same amount of normal saline was given in the sham group and model group, twice a day. BBB score was performed one day, three days and seven days after modeling. Morphological changes were tested by Nissl's staining, and the changes of malonaldehyde (MDA) content and superoxide dismutase (SOD) activity were detected by ELISA seven days after modeling. The expression of Nrf2, Kelch like ECH associated protein 1 (Keap1), NAD(P)H quinone oxidoreductase (NQO1) and haemoxygenase 1 (HO-1) were detected by Western blotting one day, three days and seven days after modeling. Results:Compared with the model group, BBB scores increased (P < 0.05); the structure of spinal cord was more complete and the number of Nissl bodies increased; SOD activity increased (P < 0.05) and MDA content decreased (P < 0.05); the expression of Nrf2, Keap1, NQO1 and HO-1 increased (P < 0.05) in the trillin group. Conclusion:Trillin may play a protective role in spinal cord injury by inhibiting oxidative stress response and improving the motor function.
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Aim To observe the absorption activity of five components of Polygonum orientale L. Flower ex-tract in Caco-2 cell monolayer. Methods The effects of different concentrations, time, temperature, pH and P-glycoprotein inhibitors on Caco-2 cells were investi-gated by UPLC-MS/MS. Results The absorption of five components of Polygonum orientale L. Flower ex-tract presented a concentration-and time-dependent manner, and the uptake of quercetin was reduced in Caco-2 cells after 90 min. There was a highest intake at 37℃,and the uptake of four components was best in acid environment except for the quercetin at pH 6 , which was best at pH5 . The uptake of quercetin and kaempferol was significantly improved after the addition of P-glycoprotein inhibitors of verapamil. Conclusions The cellular uptake mechanisms of the five compo-nents of Polygonum orientale L. Flower extract is man-inly through passive diffusion. P-glycoprotein is in-volved in the uptake of quercetin and kaempferol.
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Object To develop an easy-assembled and-disassembled image diagnostic module to solve the problems of the tent-form field medical system in size, weight, mobility, accessories, protection and etc, which is of high references for combination and integration scheme of large-scale digital imaging equipment by adopting box instrumentation.Methods The module had its design executed with system modeling, structure simulation and CAD after its service requirements were analyzed. The design fell into the ones for overall framework, combination mode, packaging and buffer vibration isolation, ergonomics, box instrumentation, radiography accessories for vertical and horizontal positions, protection device and etc.Results The module was gifted with radiodiagnosis-related performances such as digital radiography, digital diagnosis,diagnosis reporting, compatibility to vertical- and horizontal- position radiography, and radiation protection during war conditions.Conclusion The module developed gains advantages in power, continuous radiography, assembling and disassembling, accessories and protection, and thus meets the requirements of the tent-form field medical system in mass casualties imaging diagnosis.
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The concept of biometric identification technology (BIT)was described,and several typical BITs were introduced such as identification technologies for hand, face, physiological features and behavioral trait. The application of BIT was analyzed in military field of foreign countries and China.It's pointed out BIT's future involved in bioassay,integration with wireless video identification technique and etc,comprehensive identification technique with high throughput,high precision and multi mechanism as well as enhanced safety.
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Objective To select a safe, flexible and lightweight manipulator and to execute its kinematic analysis and trajectory planning, so as to improve the application of serial robot in the treatment of hazardous biochemical products. Methods The kinematic modeling was carried out for the manipulator, and the kinematic and inverse kinematic formulas were deduced and verified.Differential transform method was used to obtain the Jacobian matrix of the manipulator,and the trajectory planning was implemented for the manipulator at joint and cartesian spaces.Results An ideal motion curve was formed by the trajectory planning of serial robot to realize its stable and high-efficiency motion at spaces.Conclusion Serial robot is facilitated to execute the treatment of hazardous biochemical products, and references are provided to other researches on serial robot.
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To investigate the metabolism of quercitrin in rat intestinal flora and possible biological pathways, laying the foundation for the metabolic mechanism of traditional Chinese medicine glycosides ingredients. UPLC-Q-TOF-MS/MS method was established to detect the quercitrin and its metabolites with 0.1% formic acid solution(A)-0.1% formic acid acetonitrile(B) as the mobile phase for gradient elution at a flow rate of 0.3 mL•min⁻¹. Electrospray negative ion mode was applied to analyze the metabolites of quercitrin in rat intestinal flora. Metabolite ToolsTM, mass defect filter(MDF) and other technologies were used to screen, analyze the metabolites and infer the chemical formula of the metabolites. The results showed that quercitrin would have degalactoside, deoxygenation and acetylation reactions, and the aglycone quercetin resulted from degalactoside would have further reactions such as hydroxylation, deoxygenation, reduction, and ring opening to achieve deoxygenation metabolite kaempferol, C2-C3 double bonds hydrogenation and reduction product taxifolin, and degalactoside product quercetin. The research results showed that quercitrin can be metabolized by rat intestinal flora, which could increase their hydrophobicity and chemical diversity.