OBJECTIVE To investigate the carrier state of lid margins after eyes area disinfection by 75% alcohol and 0.5% iodine and to compare the effect of different disinfectants,so we will know whether 0.5% iodine can be used for eyes area disinfection. METHODS Thirty eight patients(76 eyes) from our hospital in March-May 2005 were analyzed.The operated eyes area as control group were disinfected by 75% alcohol-the traditional disinfection method.The contralateral eyes area without operation as experimental group were disinfected by 0.5% iodine.Lid margins samples were obtained for culture after 3 minutes. RESULTS The qualification rate was 81.58% in the experimental group whereas 60.53% in the control group(P

Objective To investigate the effects of pentoxifylline on the cell proliferation of, collagen synthesis and TGF-β1 expression by human fibroblasts derived from keloid. Methods Skin samples were obtained from the lesions of 3 patients with keloid and normal skin of 3 human controls followed by primary culture of fibroblasts. Fibroblasts of 5th to 8th generation were cultured with pentoxifylline of 0.1 to 3 g/L for various durations. Then, MTT assay was performed to detect the cell proliferation of fibroblasts, double antibody sandwich-enzyme linked immunosorbent assay (ELISA) to measure the expression of TGF-β1, and reversetranscription PCR to examine the mRNA expressions of procollagen Ⅰ and Ⅲ in these fibroblasts. Results The pentoxifylline of 0.1 to 2 g/L markedly inhibited the proliferation of fibroblasts derived from keloid lesions and normal skin, in a dose- and time-dependent manner, with the strongest effect observed in fibroblasts treated with pentoxifylline of 2 g/L. A significant reduction was induced in the TGF-β1 mRNA expression in keloidand normal skin-derived fibroblasts by pentoxifylline of 0.5 to 2 g/L (all P < 0.01), and in the mRNA expression of procollagen Ⅰ and Ⅲ by pentoxifylline of 1 and 2 g/L (P < 0.05 or 0.01). Concretely, the relative mRNA expression level of procollagen Ⅰ and Ⅲwas 0.873 ± 0.077, 0.571 ± 0.050 respectively in keloid fibroblasts respectively, and 0.473 ± 0.035, 0.370 ± 0.045 in the control fibroblasts, after treated with pentoxifylline of 1 g/L, 0.750 ± 0.036 and 0.433 ± 0.045 respectively in keloid-derived fibroblasts, 0.390 ± 0.030 and 0.250 ±0.123 respectively in the control fibroblasts, after treated with pentoxifylline of 2 g/L, significantly lower than that in the keloid-derived (1.216 ± 0.061 and 0.953 ± 0.060) and control (0.836 ± 0.080 and 0.776 ± 0.041) fibroblasts without treatment. Conclusion Pentoxifylline shows an evident suppressive effect on the cell proliferation of, as well as the expression of TGF-β1 and procollagen Ⅰ and Ⅲ in fibroblasts derived from keloid lesions and normal skin.

Objective To construct a genetically-stable double auxotrophic,in which the uracil and leucine were mutated,using the Candida parapolymorpha ATCC26012 as materials.Methods Based on the physical and genetic engineering methods,the chromosome of the C.parapolymorpha strain was modified,where the ura3 and leu2 genes were directly mutated,to obtain the uracil and leucine double auxotrophic strain.Then the constructed strain was identified by the analysis of its biological properties,such as genetic stability,the change of the genes,and the physiologic and biochemical characteristics.Results The uracil and leucine double auxotrophic strain is obtained by screening.The biological identification results show that the obtained strain is genetically stable and the targeted genes are directly altered.In addition,the physiologic and biochemical analyses indicate that the auxotrophic can utilize various kinds of carbon and nitrogen nutrient sources,and its growth is good.Conclusion The successful construction of double auxotrophic mutant strains facilitated the genetic studies on C.parapolymorpha to meet various investigational purposes.Moreover,the constructed auxotrophic strains can be applied as advantageous host cells to express multiple proteins/antigens simultaneously,which is of great significance in the development of vaccines.

Optimization on sustained release preparation formulation is a multi-factor, multi-level complex optimiza-tion problem. Artificial neural network is very suitable for dealing with such complex multivariable nonlinear system. Based on analyzing the characteristics of sustained release preparation and the main influential factors of its quality, this paper focused on building a quality forecast model for sustained release preparation formulation by using BP neural network. The results showed that the BP neural network can effectively forecast the quality of sustained re-lease preparation formulation. It is a powerful optimization tool of sustained release preparation formulation.

Objective To explore the relationship between expression of P-glycoprotein (P-gp), a product of multidrug resistance (MDR) gnne, in the peripheral blood of children with intractable or newly diagnosed epilepsy for drug resistance. To establish a marker of drug resistance. To evaluate the therapeutic effect of flunarizine in the treatment of intractable epileptic patient with or without overexpression of P-gp. Methods The expression of P-gp in peripheral blood were investigated in 86 epileptic children (41 in intractable epilepsy group, 45 in newly diagnosed epilepsy group) and 44 healthy children (controlled group) by flow cytometry. Intractable epileptic patients with or without overexpression of P-gp were given flunarizine 2.5 - 5 mg, po, qn, for 3 months and followed up. Results Overexpression of P-gp were found in 23 (56.1%) patients of intractable epilepsy group, in 10 (22.2%) patients of newly diagnosed epilepsy group and three (6.8%) children of the controlled. In intractable epilepsy group, 17 out of 23 cases (73.9%) patient with overexpression of P-gp became tolerant to antiepileptic drugs, while 3 out of 18 cases (16.7%) patient without expression of P-gp became tolerant to antiepileptic drugs, and there was significant difference between them (P < 0.01) . In the newly diagnosed epilepsy group, seven out of 10 cases (70%) with overexpression of P-gp became intractable epileptic patient and three out of 35 eases (18.6%) without expression of P-gp became intractable epileptic patient, there was significant difference between them (P < 0.01). Twenty patients of intractable epilepsy group were given flunarizine for three months, 11 of 17 patients with P-gp overexpression and 1 of 3.patients without P-gp expression were effective. When reexamined, P-gp expression in 6 out of 11 patients became negative. Conclusions It is suggested that overexpression of P-gp in the peripheral blood of intractable epileptic patients might be a significant marker of drug resistance. Newly diagnosed epileptic patients with overexpression of P-gp may develop intractable epilepsy. P-gp was a predictable marker of intractable epilepsy. Flunarizine could be a choice in treatment of intractable epilepsy with overexpression of P-gp. The antiepileptic mechanism of flunarizine may involve in reversing of P-gp.

Objective To investigate the association of interleukin-6 (IL-6) with depression using meta analysis. Methods A systematic literature search was conducted to examine depression and interleukin-6 in Chinese patients us-ing“depression”and“interleukin-6”in Databases including PubMed, CBM, VIP, CNKI and WanFang Data. A me-ta-analysis was performed to analyze correlation between depression and interleukin-6 using RevMan 5.2.8 software. Results A total of 9 studies were recruited, involving 432 depression patients and 277 healthy controls. The results of meta-analysis showed that concentration of IL-6 was higher in depression patients than in healthy controls(SMD=1.48, 95%CI:0.78~2.18,P<0.05). Subgroup analysis in the first-episode subgroup and the non first-episode subgroup showed that concentration of interleukin-6 was higher in depression patients than that in controls [the first-episode subgroup (SMD=1.94,95%CI:0.07~3.81,P<0.05), the non first-episode subgroup (SMD=1.26,95%CI:0.60~1.93,P<0.05)]. Conclusion There is a good correlation between depression and the serum IL-6 concentration. Due to the small number of studies and heterogeneity in different studies, the present meta-analysis has not yet confirmed the quantitative correla-tion between IL-6 and depression.

Objective To analyze the feasibility of the recombinant cholera toxin B subunit (rCTB) as a carrier protein candidate for the preparing of polysaccharide-protein conjugate, and to discuss the immune effects of tetanus toxoid (TT) as the carrier protein in mucosal delivery vaccine. Methods The refolded pentrumer protein, rCTB was obtained by genetic engineering methods. Then conjugated the refold-ed protein with group A meningococcal polysaccharide (GAMP) using the chemical method(ADH) ,the pol-ysaccharide-protein conjugates(GAMP-rCTB) were prepared. BALB/c mice were immunized either intraper-itoneally ( i. p. ) or intranasally ( i. n. ) with GAMP-rCTB. Moreover, GAMP-TT vaccine that TT as carrier proteins was i.n. immunized to the mice. The evaluation of immunology is performed. Results The conju-gates of polysaccharide-potein with the rCTB and TT as protein carrier both are able to elicit high level of GAMP specific IgG antibody in serum after i.n. immunization, and the conjugates can also elicit specific IgA antibody in lung lavage and intestinal mucosa. Conclusion rCTB and TT can both as the protein carri-er for polysaccharide-protein conjugate as mucosal vaccine. The route of intranasal may be more ways for im-mune function than i.p. immunization when rCTB is used as the carrier of the polysaccharide-protein conju-gates.

Objective To explore the distinction between measles vaccine strain Shanghai-191 (S- 191) and wild-type strains in China at molecular level. Methods After having been amplified by RT-PCR, the nucleotides of S-191 was sequenced and analyzed with reference to the sequences obtained from Gen- Bank, which includes 24 whole genome sequences, 211 sequences of wild-type strains isolated from China and WHO reference strains. Results The sequence of S-191 strain had been submitted to GenBank. Phylo- genetic analysis of the COOH terminal 456 nucleotides coding for the nucleoprotein (N) indicated that most of the measles virus strains from China were members of clade H1. The genetic distances between the virus strains detected in a number of provinces and S-191 strain were 6.7% -8.2%. It is noteworthy that the muta- tion rate of non-coding regions was considerably higher than that of coding regions. The mutation rate of N gene was the highest among all of the coding regions. Conclusion This report shows that genotype H1 is widely distributed throughout the country. The circulation has no apparent geographic and temporal restric- tion. The evolution of measles virus should be closely followed.

Objective To evaluate the immunogenicity of group A and C meningococcal polysaccharides conjugates using different proteins as carriers. Methods Heat-labile enterotoxin B subunit (LTB)pentamer form was expressed in E. coli. The target protein was identified and purified by cation-exchange chromatography. Then biological activity of rLTB was tested using GM1-ELISA. GCMP was conjugated to rLTB with the chemical method (ADH). Furthermore, the mice were immunized with GAMp-TT/GCMP-TT conjugates and GAMP-TT/GCMP-rLTB conjugates via peritoneal. Finally the anti-polysaccharide antibody was detected. Results The GAMP-TT/GCMP-rLTB conjugate elicits remarkably higher serum antibodies in mice than GAMP-TT/GCMP-TT conjugate. Conclusion These results indicated that polysaccharide conjugates using different proteins as carriers were superior to those using only one protein as carrier.