AIM: To study the effect of the subretinal fluid (SRF) on proliferation of retinal pigment epithelium (RPE) cells and retinal glial (RG) cells and associated activation and translocation of protein kinase C (PKC) as well as the application of PKC inhibitor.MTEHODS: RPE and RG cells were disintegrated to obtain PKC activity of cytoplasm and cellular membrane after being treated by the subretinal fluid (SRF) from the different stages of PVR patients (grade B and C) or being treated with PKC specific activator [phorbol-12-myris-tate-13-acetate (PMA)] or normal vitreous or DMEM culture medium. PKC activity in cytoplasm and cellular membrane was measured using radioactive isotope 32P labeling in a specific reaction of phosphorylation on PKC substrate. In addition, the PKC inhibitor, dequalinium chloride, was used to pretreat the RPE and RG cells before the cells exposed to SRF or PMA or normal vitreous. 3H-TdR (tritiated thymidine) was used to measure the levels of proliferation of RPE and RG cells with or without the activation and translocation.RESULTS: SRF and PMA promoted the proliferation of RPE and RG cells. SRF and PMA activated PKC in the cytoplasm of RPE and RG cells and the activated cytoplasm PKC translocated to the cellular membrane of RPE or RG cells. The cell proliferation or PKC activation or translocation were not equally active in RPE as in RG cells. However, PKC inhibitor which attenuated the cell proliferation did not show significant difference on inhibition of RPE and RG cell proliferation. (P ＞0.05).CONCLUSION: SRF can lead to the activation and translocation of PKC in RPE and RG cells, which promote the proliferation of RPE and RG cells. Dequalinium chloride can inhibit PKC activation and translocation hence slow down the cells proliferation.

Animals ; Atherosclerosis ; etiology ; metabolism ; Gene Expression Regulation ; Humans ; Lipase ; analysis ; genetics ; physiology ; Lipoproteins ; metabolism ; Lipoproteins, HDL ; metabolism ; Lipoproteins, LDL ; metabolism ; Polymorphism, Genetic ; Tissue Distribution

Objective To investigate the changes of T cells and disease development in the mice with Smad3 deficiency in the bone marrow cells.Methods Bone marrow cells obtained from Smad3 null(Smad3~(-/-))mice and wild type(Smad3~(+/+))mice were injected to Co~(60)-irradiated GFP mice,respectively.The general states of the bone marrow recipients were observed.The mice were sacrificed at the sixth week and the histopathological changes in the intestines were examined.The changes of T cells from lymph nodes were detected by flow cytometry.Results Smad3~(-/-) bone marrow recipient mice appeared a wasting syndrome and intestinal inflammation.The amount of CD4~+ CD62L~(lo) T cells in lymph nodes was significantly increased.Conclusion These results indicate that the mice with Smad3 deficiency in the bone marrow cells present an inflammatory disorder and their T cells are activated.

BACKGROUND:Corneal stromal fibroblasts have been shown to express interleukin-8 in the stimulation of lipopolysaccharide. Different reactions of fibroblasts to lipoprotein or other inflammatory mediators may constitute different characteristics of different tissues in the inflammatory response. OBJECTIVE:To observe the inhibitory effect of IKK-2 receptor blocker TPCA-1 on human corneal stromal fibroblasts to secrete inflammatory cytokines, chemokines and cel adhesion molecules under the stimulation of lipopolysaccharide and its signal transduction pathway, to compare with dexamethasone, and to explore alternative or synergistic effects after their combination. METHODS:This study measured the secretion of interleukin-1, tumor necrosis factor alpha, interleukin-6, and interleukin-8 from cultured human corneal stromal fibroblasts under the action of basic state and lipopolysaccharide, and their changes after the intervention with IKK-2 receptor blocker TPCA-1 and dexamethasone. We also detected expression level of intercelular adhesion molecule-1 and interleukin-6 in cel surface, and verified the changes in expression levels of intercelular adhesion molecule-1, interleukin-6, and interleukin-8 from mRNA level, as wel as examined the expression of nuclear factor kappa B under above conditions.

Objective To find an internal quality controlling method for 17-OHP determination by time-resolved fluoroimmuno-assay .Methods 20 quality control data were collected .The data were analyzed by using L-J method ,instant method and improved instant method .Results were used for the construction of quality control charts .Result The first three quality control data had a great impact on the following judgments of internal quality controlling when instant method was used .The subsequent results might be false acceptance .Improved instant method could effectively reduce the situations of false run-away and false acceptance ,which was suitable for the internal quality control of 17-OHP determination by time-resolved fluoroimmunoassay in newborn screening . Conclusion There are many steps of manual operations in 17-OHP determination of time-resolved fluoroimmunoassay .The details of these operations have great impacts on the experimental results .Thus ,the operations of 17-OHP test should be specified and exe-cuted strictly according to requirement .

Recently,increasing cancer researches focus on antibody-drug conjugates(ADCs) which can improve the anti-tumor potency with less adverse effect while benefiting patients in the future. However,safety evaluation of ADCs is a big challenge because of complex components as well as in experience in preclinical studies. In this review,the authors reviewed the mode of action,hazard risks,and toxicity observed in preclinical/clinical studies of ADCs,summarized the preclinical studies of Adcetris(brentuximab vedotin)and Kadcyla(ado-trastuzumab emtansine),and suggested a better strategy of ADCs in preclinical safety evaluation.

ObjectiveTo evaluate the therapeutic efficacy of bleeding cupping with different acupoints and frequencies in treating acne vulgaris.MethodSixty-four patients were divided by using stratified randomization method into Dazhui (GV14) group of 32 cases (16 cases in the subgroup of once every week, and the other 16 cases in the subgroup of twice every week) and Geshu(BL17) group of 32 cases (16 cases in the subgroup of once every week, and the rest 16 cases in the subgroup of twice every week). Dazhui group received bleeding cupping once every week or twice every week, while Geshu group also received bleeding cuppingonce every week or twice every week. The acne symptoms scores and total score were observed before and after intervention to evaluate the therapeutic efficacy.ResultThe symptoms scores including oily condition, skin lesion nature, counts, color, and swelling pain were decreased after intervention in the two groups (P<0.01). The improvement of oily condition in Geshugroup was more significant than that in Dazhuigroup (P<0.05). The symptoms scores including oily condition, skin lesion nature, counts, color, and swelling pain were decreased after intervention in all the subgroups of different frequencies (P<0.01). The improvements of skin lesion nature and swelling pain were more significant in the subgroups of twice a week than that in the subgroups of once a week (P<0.05).ConclusionBleeding cupping with different acupoints and frequencies all can produce satisfactory efficacies; bleeding cupping at Geshucan produce a more significant efficacy than that at Dazhui;treatment at a frequency of twice a week can produce a more significant effect than once a week in improving skin lesion nature and swelling pain.

Adenoma, Acidophil ; metabolism ; Adult ; Angiomyolipoma ; genetics ; metabolism ; pathology ; Carcinoma, Renal Cell ; metabolism ; Codon ; Diagnosis, Differential ; Exons ; Female ; Follow-Up Studies ; Gene Deletion ; Genes, p53 ; Humans ; Kidney Neoplasms ; genetics ; metabolism ; pathology ; Male ; Melanoma-Specific Antigens ; metabolism ; Middle Aged ; Retrospective Studies ; Tumor Suppressor Protein p53 ; genetics ; metabolism

Objective To investigate the efficacy of oxygen uptake efficiency slope (OUES) on evaluation the cardiopulmonary function of patients with chronic obstructive pulmonary disease (COPD). Methods The cardiopulmonary function of 54 stable COPD patients with the cardiopulmonary function of Ⅱ~Ⅳ were evaluated, following a symptom-limited Steep protocol with simultaneous respiratory gas measurement,they were performed exercise tests on a treadmill, simultaneously the oxygen uptake (VO2), carbon dioxide production (VCO2),peak oxygen uptake (VO2peak), minute ventilation (VE), and respiratory gas exchange rate (RER) were measured. OUES was derived from the relation between VO2 and VE during incremental exercise and was determined by VO2=algVE+b, where a=OUES, to measure anaerobic threshold (VAT) meanwhile. Results OUES correlated with the VO2peak (P<0.001). 75% OUES, 90% OUES and 100% OUES were not significantly different (F=0.239, P=0.830). Conclusion OUES can respond the cardiopulmonary function in patients with COPD, 75% OUES from sub-maximal exercise can be an index for cardiopulmonary function.

Objective To investigate the apoptotic effects of hypertrophic scar fibroblast (HSF) induced by HMME-PDT.Methods Fibroblasts were cultured from nontreated hypertrophic scars,and cells at passages 4-6 were used for the experiments (photosensitizer dose 4 μg/ml,λ630 nm,pow er density 10 mw/cm2,energy fluence 2.5 J/cm2).Morphological and biochemical changes in fibroblasts were assessed by Hoechst 33258 staining and fluorescence microscopy.The rate of apoptotic or necrotic cells was detected by flow cytometry (FCM) through double staining of Annexin V -FITC and popodium iodide (PI),respectively.Results Marked morphological features of cell apoptosis were viewed under the fluorescent microscope through Hoechst 33258 staining.The analysis of FCM indica ted that the apoptotic rate was significantly increased after HMME PDT [(34.82 ± I.42) ％ vs (3.12±0.28) ％,P＜0.05],and apoptotic rate was higher than necrosis rate [(14.65±1.02) ％ vs (34.82±1.42) ％,P＜0.05].Conclusions Low level exposure to 630 nm PDT mediated by HMME appears to induce fibroblast apoptosis.