2.Bone marrow mesenchymal stem cells inhibit inflammatory response of microglial cells
Kaihua ZHANG ; Fei WANG ; Huimin HU ; Hua HUANG ; Yihua AN
Acta Laboratorium Animalis Scientia Sinica 2014;(2):1-5
Objective To investigate the inhibitory effect of bone marrow mesenchymal stem cells ( BMMSC) on the inflammatory response of microglial cells .Methods The samples were divided into four groups .Group I:microglial (BV-2) cells were cultured in DMEM (high glucose).Group II: BV-2 cells were cultured in DMEM containing lipopo-lysaccharide (LPS).Group III:BV-2cells and BMMSCs were co-cultured in DMEM.Group IV: BMMSCs were cultured in DMEM containing LPS .The growth state and ultrastructure of BV-2 cells were observed and the changes of TNF-αex-pression were detected .Results Different cell densities of BV-2 cells were observed under the optical microscope in an or-der from high level to low level:group I >group III >group II.The expressions of TNF-αwere:group Ⅱ >groupⅢ>group Ⅰ.Ultrastructural observation of BV-2 cells showed that there were a large number of swollen mitochondria and endoplasmic reticulum , some of them showed vacuolization .No BV-2 cells with multiple hucleoli were found in the group II indicating the absence of active cell growth .At the same time, cytolysis was observed only in the group II .The growth of BV-2 cells in the group III was better than that in the group II .Conclusions BMMSCs can inhibit inflammatory response of microglial cells, therefore, play a neuroprotective role.
3.Pain control after excimer laser corneal surface ablation
Yuan, ZENG ; Yi-Fei, HUANG ; Jian-Hua, GAO
International Eye Science 2014;(8):1421-1425
By reshaping the cornea without the creation of a stromal flap, excimer laser corneal surface ablation eliminates flap-related complications and avoids the risk of ectasia that may occur after laser assisted in situ keratomileusis ( LASIK ) . Post-operative pain is one of the most significant disadvantages of surface ablation and thus the management of pain and discomfort following surface ablation is of great importance. We summarize mechanism of corneal pain and current approaches to pain management after surface ablation.
4.Detection and Drug Resistance Analysis of Ureaplasma urealyticum and Mycoplasma hominis of Urogenital Tract
Yingming FEI ; Wen ZHAO ; Faxiang JIN ; Li HUANG ; Hua QIAN
Chinese Journal of Nosocomiology 2006;0(09):-
OBJECTIVE To find out the status about detection and drug resistance of Ureaplasma urealyticum(Uu) and Mycoplasma hominis(Mh) of urogenital tract infection in Shaoxing area of Zhejiang Province.METHODS The detections and drug sensitive tests of Uu and Mh adopting the reagent boxes produced by bioMerieux Company in France were made.RESULTS In 2678 samples of suspicious urogenital tract infection patients,980 samples cultured of mycoplasma were positive,and the positive rate was 36.6%.Among these cases,763 samples(28.5%) were Uu positive;116 samples(4.3%) were Mh positive.In the drug sensitive test,Uu and Mh were most sensitive to PRI,JOS,DOX and TET.To CFLX,OFL,ERY,CM and AM,they had the highest level of drug resistance.CONCLUSIONS The clinical therapy of mycoplasma infection ought to choose the appropriate antibiotics based on the results of the drug sensitive test of the laboratory.
5.The effects of activating the ERK signaling pathway with an electromagnetic field on osteogenic proliferation and differentiation of mesenchymal stem cells
Dongming ZHAO ; Hua WU ; Shanshan HUANG ; Fei HUANG ; Wenchun ZHAO ; Yong YANG ; Chaoxiong TAO
Chinese Journal of Physical Medicine and Rehabilitation 2008;30(8):515-518
Objective To investigate the effects of an electromagnetic field on the extra-cellularly regulated kinase(ERK)signalling pathway and to determine the impact of electromagnetic activation on osteogenic proliferation and differentiation in rat bone marrow mesenchymal stem cells.Methods Rat bone marrow mesenchymal stem cells were isolated and cultured in vitro.The third-passage cells were divided into 4 groups(Control,PD98059,EMF and EMF+PD98059).Western blotting Was used to detect the activation of the ERK signal pathway after exposure to an electromagnetic field.MTT assay Was used to determine the activation of proliferation in the celb in the different groups.The cells' alkaline phosphatase activities were also detected. Results (1)The ERK signal pathway in these rat bone marrow mesenchymal stem cells was activated after exposure to a 15 Hz.1 mT,sine wave form electromagnetic field for 5 min.Activation remained high for at least 1 h.PD98059 can effectively block the activation of the ERK signal pathway.(2)Cell proliferation was promoted after exposure to the electromagnetic field,and this effect could be significantly inhibited by PD98059.(3)Alkaline phosphatase was significantly elevated in these bone marrow mesenchymal stem cells after exposure to the electromagnetic field.The activation in the EMF+PD98059 group Was slightly greater than in the EMF group.Conclusion Electromagnetic fields of 15 Hz and 1 mT can activate the ERK signal pathway and alter proliferation and osteogenic differentiation in the bone marrow mesenchymal stem cells of rats.
6.Relationship between skin prick test reactivity to dermatophagoides farinae and autologous serum reactivity in patients with chronic urticaria
Xiuying HUANG ; Xiaofang ZHOU ; Lin FENG ; Hua ZHONG ; Zhiqiang SONG ; Fei HAO
Chinese Journal of Dermatology 2011;44(1):15-17
Objective To investigate the role of and relationship between reactivity to autologous serum and dermatophagoides farinae (Df) in the pathogenesis of chronic urticaria (CU). Methods Autologous serum skin test (ASST) and skin prick test (SPT) to Df were carried out in 831 patients with CU. The correlation between reactivity to autologous serum and Df was statistically analyzed. Results The positivity rate of ASST and SPT to Df was 51.74% and 64.62%, respectively in the 831 patients. SPT was positive in 56.52% of patients with positive ASST and in 73.86% of those with negative ASST (P < 0.05). In patients with positive ASST, the degree of autologous serum reactivity was negatively correlated with that of reactivity to Df (P < 0.05). Conclusions The skin reactivity to Df and autologous serum plays an important role in the pathogenesis of CU, and the degree of the reactivity to Df and autologous serum is negatively correlated. To conduct ASST and SPT simultaneously in patients with CU may favor the clinical classification and therapy of CU.
7.Outcomes and survival analysis of patients with AML and high risk MDS treated by CAG regimen
Beiwen NI ; Fangyuan CHEN ; Jieying HAN ; Hua ZHONG ; Lu ZHONG ; Honghui HUANG ; Lijing SHEN ; Fei XIAO
Journal of Shanghai Jiaotong University(Medical Science) 2009;29(11):1355-1358
Objective To evaluate the clinical efficacy and adverse effects of CAG regimen in treatment of primary, refractory and relapsed acute myeloid leukemia (AML) and high risk myelodysplastic syndrome (MDS), and analyse the factors influencing long-term survival. Methods Sixty-one patients with AML ( primary, n = 27; refractory, n = 18; relapsed, n = 16) and 9 patients with MDS were treated with CAG regimen. Examinations on liver and renal function, electrocardiogram and bone marrow cytology were performed before and after treatment, and adverse effects of CAG were observed. Short-term efficacy was evaluated based on clinical manifestation, peripheral blood and bone marrow cytologic examinations. Patients were followed up, overall survival ( OS) and disease free survival ( DFS) were analysed, and long-term efficacy of CAG regimen was evaluated. The factors influencing long-term survival were analysed by Log-rank test of survival curve. Results After a course of treatment by CAG regimen, the total effective rate was 71% , and 34 patients (49%) experienced complete remission. The median time of follow up was 45 months, the median OS was 28 months, and the median DFS was 23 months. Age, level of lactate dehydrogenase (LDH), remission condition after a course of treatment by CAG regimen and adoption of HD-Ara-C regimen as consolidation treatment were influencing factors for OS and DFS. The dominant clinical adverse effects were bone marrow depression, with 13 d as the median duration of agranulocytosis ( neutrophil <0.5 ×10~9/L) and 9 d as the median duration of thrombocytopenia (platelet <20 ×10~9/L). Conclusion CAG regimen may lead to favourable therapeutic effects in treatment of primary, refractory and relapsed AML and high risk MDS, and may yield less adverse effects and better long-term therapeutic effects. Age, level of LDH, remission condition after a course of treatment and adoption of HD-Ara-C regimen as consolidation treatment are dominant influencing factors for survival.
8.Effect of electromagnetic field on the osteogenesis gene expression profiles of bone marrow mesenchymal stem cells
Dongming ZHAO ; Hua WU ; Yong YANG ; Fei HUANG ; Feng LI ; Wenchun ZHAO
Chinese Journal of Physical Medicine and Rehabilitation 2008;30(4):235-238
Objective To screen the differential expression genes of bone marrow MSCs stimulated by electromagnetic field(EMF)with osteogenesis microarray analysis,and to study the underlying mechanism that EMF promotes the differentiation of bone marrow MSCs. Methods The Sprague-Dawley rat bone marrow MSCs were isolated and cultured in vitro.The third-passage cells who were stimulated by EMF and served as the stimulated group,and those who were not stimulated by the EMF served as the controls.Total RNA was extracted and purified,then it was used to synthesize cDNA and cRNA.The eRNA of stimulated group and the control group was hybridized with the rat oligo osteogenesis microarray,respectively.The hybridization signals were acquired by using X-ray film after chemiluminescent detection and the obtained data were analyzed using the web-based completely integrated GEArray Expression Analysis Suite.RT-PCR was used to identify the chosen genes BMP1,VDR and EGF. Results Nineteen differential expression genes were found between the stimulated group and the control group.There were 6 upregulated and 13 downregulated genes in the stimulated group.Semi-quantitative RT-PCR confirmed that the expression levels of BMP1,VDR mRNA in the stimulated group were upregulated and EGF downregulated. Conclusion The gene expression profiles about osteogenesis of the bone marrow MSCs were changed after EMF intervention(1 5 Hz,1 mT).These genes are involved in the difierentiation of bone marrow MSCs into osteoblast.These results provide deeper insight into the mechanism that EMF exposure facilitates the in vitro differentiation of bone marrow MSCs.
9.DCX and GFAP time-course expression in dentate gyrus of hippocampus following kainic acid-induced seizures on C57/BL6 mice.
Pei-Fei GU ; Hua WEN ; Wen-Shu HUANG ; Song-Yan ZHAO ; Yu SHANG
Chinese Journal of Applied Physiology 2011;27(1):11-12
Animals
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Dentate Gyrus
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metabolism
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Epilepsy
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chemically induced
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metabolism
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Glial Fibrillary Acidic Protein
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metabolism
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Hippocampus
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metabolism
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Kainic Acid
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Male
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Mice
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Mice, Inbred C57BL
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Microtubule-Associated Proteins
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metabolism
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Neurons
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metabolism
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Neuropeptides
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metabolism
10.The effect of web-based histologic laboratories for general practical students
Chi OUYANG ; Hua-fei DENG ; Xuan HUANG ; Xioo-lan CHEN ; Shi-wang LI ; Jian-ping LIU
Chinese Journal of Medical Education Research 2011;10(10):1249-1251
ObjectiveTo assess the satisfaction of general practical students' perception with the two modes of histologic laboratory instruction,and obtain the advantages and disadvantages of each mode.MethodsWeb-based database was established and in the questionnaires were delivered to the general practical students ( n=193 ).Results75% of students agreed that the case study component of the webbased laboratory instruction was arranged in order.82% of students identified with the detailed word explanation attached to every image presented.ConclusionStudents support the progression of web-based histologic laboratory instruction,but it is difficult to replace traditional microscope with web-based database in histologic laboratory instruction.