Identification of Artemisiae Annuae Herba Based on Algorithm for Diversity of XML Tree Map / 中国实验方剂学杂志

Objective: To study and create the algorithm for the diversity (AD) of extensible markup language (XML) tree map, and provide a new tool for the identification of Artemisiae Annuae Herba. Method: According to the literature research, the key information of Artemisiae Annuae Herba was selected from the macroscopic, mesoscopic and microscopic information, etc. Based on the key information, the relevant upper standards of domestic and foreign professional fields were cited to assign the unique identification independent of language for each data element, and the coding rules of relevant data elements were established. The digital coding technology was applied to the flexible structure editor, and the tree map was created, which could be returned as the 5th version of hypertext markup language (HTML5) or XML format. Based on the diversity related algorithms, the authors innovatively developed the AD of XML tree map of Artemisiae Annuae Herba, which took into account both of topology and semantics, and the expression model of related mathematical functions of Artemisiae Annuae Herba was established. By comparing the calculation results with the reality, the algorithm model was debugged continuously until the convergence of the core-culvert algorithm model. Result: Through the research on AD, the diversity between two XML tree maps could be calculated, and the discrimination or identification model of Artemisiae Annuae Herba also could be finally optimized and established. After calculation and analysis of the tested tree maps, the effective rate of the model was 100%. Conclusion: In this study, the establishment of the AD of XML tree map can effectively assist in the identification of Artemisiae Annuae Herba, which provides certain technical support and theoretical guidance for the research on intelligent application of traditional Chinese medicine.

Effect of glucocorticoid with traditional Chinese medicine in severe acute aespiratory syndrome (SARS) / 中国中药杂志

<p><b>OBJECTIVE</b>To evaluate the effects of traditional Chinese medicine in 461 cases of severe acute respiratory syndrome(SARS) on glucocorticoid's dosage.</p><p><b>METHOD</b>By using the polycentric nonrandomized concurrent controled trial and under the condition of glucocorticoid use, the patierts were divided into two groups: the integrated traditional Chinese and western mendicine(ITCWM) and simplicity western mendicine alone(WM). The observation indexes were time in hospital, pneumonia duration, mortality, glucocorticoid's gross dosage, glucocorticoid's average dosage of days and glucocorticoid use time.</p><p><b>RESULT</b>In the ITCWM group, average time in hospital was shortened (P = 0.058), pneumonia duration was shortened (P = 0.057), mortality fell (P = -0.001). The median of glucocorticoid' s gross dosage was 1,277.0 mg x d(-1) in the ITCWM group, and that was 1,680.0 mg x d(-1) in the WM group (P = 0.083). The median of glucocorticoid's average dosage of days was 84.40 mg x d(-1) in the ITCWM group, and that was 115.33 mg x d(-1) in the WM group (P = 0.025). According to the analysis of 461 cases divided by stages and different ponderance, within 7 days after illness, in the ITCWM group, the glucocorticoid' s average dosage decreased. In the common type, the dosage in the ITCWM and in the WM was 146.43 mg x d(-1), and 183.64 mg x d(-1), respectively (P = 0.057), in the severe type, that was 137.71 and 177.86 mg x d(-1), respectively (P = 0.001).</p><p><b>CONCLUSION</b>Compared with the group of simplicity western mendicine, in the group of integratived Chinese and western mendicine, time in hospital shorten, pneumonia duration shorten, mortality fall, simultaneity, glucocorticoid's average dosage is decreased. The use of TCM in the forepart of treatment can be capable of decreasing glucocorticoid's dosage.</p>

Observation of the grafting of platelet-derived growth factor gene-modified artificial composite skin on rat wounds / 中华烧伤杂志

<p><b>OBJECTIVE</b>To observe the effects of the grafting of a platelet-derived growth factor gene-modified artificial composite skin on rat wounds with full thickness defect.</p><p><b>METHODS</b>Platelet derived growth factor-B (PDGF-B) eukaryotic expression plasmid was constructed, and the fibroblasts were transfected with it by liposome mediation. Artificial composite skins 1 and 2 were constructed respectively. The skin1 was composed of keratinocyte, porcine acellular dermal matrix and PDGF-B gene-transfected fibroblasts while the skin 2 contained keratinocyte, porcine acellular dermal matrix and fibroblasts. The two kinds of composite skin were grafted onto wounds on the rat back to form composite skin group 1 (C1) and 2 (C2), respectively, with 18 rats in each group. Eight rats with wounds without treatment served as control (C) group. The survival rate of the composite skin was observed at 2 post-operative weeks (POWs). The rat wounds were examined grossly on 2, 4 and 6 POWs for the calculation of wound contraction rate. Wound tissue samples were harvested for histological examination.</p><p><b>RESULTS</b>(1) Up to 2 POWs, 14 grafts in C1 group survived completely, 3 with partial survival and 1 failure. In C2 group, 10 skin grafts survived completely, 4 with partial survival and 4 failures. (2) A scab was formed in the wound at 2 POW in C group. The surface of the grafted skin in C1 group was smooth, elastic, and showed good anti-friction properly, and it was better in quality compared with that in other two groups at 6 POW. (3) The wound contraction rate of the grafts in C group of rats was higher than that in C1 and C2 groups at 2, 4 and 6 POWs, while that in C1 was lower than that in C2 group. (4) Capillary formation was more intense in the grafted skins in C1 group at 2 POWs, and the epithelia differentiated well into 7 to 10 layers of epithelial cells with compact and orderly arrangement and evenly distributed fibrous tissue at 6 POWs.</p><p><b>CONCLUSION</b>Repair of the wound with artificial composite skin containing PDGF-B gene could improve the quality of wound healing.</p>

Preparation of porcine acellular dermal matrix by low concentration of trypsin digestion and repeated freeze-thaw cycles / 中华烧伤杂志

<p><b>OBJECTIVE</b>To establish a new method for the preparation of porcine acellular dermal matrix.</p><p><b>METHODS</b>The antigenicity of the porcine dermis was weakened by removing epidermal and dermal cells from the porcine skin through the digestion with low-concentration trypsin and repeated freeze-thaw cycles. Split thickness porcine skin was treated with 0.05% trypsin to remove the cells from the epidermis and dermis. Repeated freeze-thaw cycles were employed to further weed out the residual cells within the dermis. The prepared acellular dermis was then examined grossly, as well as histologically, and also by immunohistochemical method.</p><p><b>RESULTS</b>No cell could be identified in the prepared porcine acellular dermal matrix. The integral basement membrane was preserved on the surface of dermal matrix with compact dermal matrix collagen structure.</p><p><b>CONCLUSION</b>Low concentration trypsinization and repeated freeze-thaw cycles seemed to be a simple and effective method for the preparation of xenogeneic acellular dermal matrix.</p>

Effect of expression of platelet-derived growth factor B gene on blood vessel reconstruction after tissue engineering skin grafting / 中华整形外科杂志

<p><b>OBJECTIVE</b>To study the effect of PDGF on dermal blood vessel reconstruction by transplanted tissue-engineering skin containing PDGF-B gene to rats.</p><p><b>METHODS</b>The recombined eukaryotic expression vector, pcDNA3.1-hPDGF-B, was constructed and transfected into fibroblasts mediated by LipofectAMINE. Keratinocytes + acellular dermal matrix (group A), keratinocytes + acellular dermal matrix + fibroblasts (group B), keratinocytes + acellular dermal matrix + fibroblasts with PDGF gene (group C) were recombined respectively, then transplanted them to rat dorsum and evaluated the reconstruction of blood vessels in the dermis after 2, 4, 6 week postoperation.</p><p><b>RESULTS</b>In 2-4 weeks after skin grafting the vascularization rate in group C was higher than that of group B and group A. The vascularization rates in all groups had no significant differences in six weeks (P > 0.05).</p><p><b>CONCLUSION</b>PDGF-B gene plays an important role in reconstruction of blood vessels in the dermis at early tissue-engineering skin grafting, which ensures the take of grafted tissue-engineering skin.</p>