1.APPLICATION OF PHOSPHOLIPID FATTY ACID METHOD IN SOIL MICROBIAL ANALYSIS
Shu-Guang WANG ; Yan-Lin HOU ;
Microbiology 1992;0(01):-
Phospholipid fatty acids are the major constituents of the membranes of all living cells, and different groups of microorganism synthesize a variety of PLFA through various biochemical pathways. Several PLFAs can be used as "signatures" to analyze changes in microbial biomass and microbial communities structure. More and more PLFA method was used in soil microbial analysis. This article briefly reviewed the applications of PLFA methods in soil microbial analysis.
2.Timing of retinal vein occlusion laser photocoagulation
Wei, ZHANG ; Da-Guang, BI ; Shu-Yan, GU
International Eye Science 2014;(8):1403-1406
AIM:To observe the clinical curative effect of different duration of retinal vein occlusion ( RVO ) by laser photocoagulation treatment, discuss the timing of the RVO laser photocoagulation treatment, provide the basis for clinical choice of RVO photocoagulation treatment time.
METHODS: Retrospective analysis. Line selection retinal laser photocoagulation treatment for 103 cases (103 eyes) with RVO, patients were divided into three groups according to the onset time. In group A (46 eyes), course≤ 1mo, 28 eyes with branch retinal vein occlusion ( BRVO ) , 18 eyes with central retinal vein occlusion ( CRVO);30 eyes were ischemic RVO, 16 eyes were non-ischemic RVO. In group B (38 eyes), 1mo
CONCLUSION:RVO laser photocoagulation in the early intervention treatment can accelerate the retinal hemorrhage, macular edema, absorption, effectively protect the patient's existing vision, improve the long-term vision, and has a certain clinical practical significance.
3.Multiwavelength laser treatment of the central serous chorioretinopathy by 3 D-OCT guidance
Wei, ZHANG ; Da-Guang, BI ; Shu-Yan, GU
International Eye Science 2014;(10):1876-1878
AIM:To introduce a new method of guiding by using 3D-OCT to treatment central serous chorioretinopathy ( CSCR) with multiwavelength laser.
METHODS:Twenty-three cases ( 23 eyes ) typicality central serous chorioretinopathy were collected in July 2010 to July 2013 in Changchun Aier Eye Hospital, using 3D-OCT model locate central serous chorioretinopathy leakage point and photocoagulation treatment with multiwavelength laser. Postoperative follow-up of 24wk, the postoperative vision and macular area retina neuroepithelial layer detachment height were observed.RESULTS: Twenty-three cases ( 23 eyes ) of central serous chorioretinopathy patients by the 3D-OCT guided multiwavelength laser treatment vision after 24wk of follow-up compared with before treatment. there was statistically significant ( P < 0.05 ) . Visual improved obviously after treatment. OCT macular area before and after the treatment on macular area retina neuroepithelial layer detachment height ( P<0.05 ) . OCT macular area before and after the treatment of macular area retina neuroepithelial layer detachment height significantly decreased, slurry apparent absorption. Except 1 case lost visitors, 23 cases ( 23 eyes ) with central serous chorioretinopathy did not see the whole body or eye local adverse reactions occur.
CONCLUSION: 3D- OCT guided by multiwavelength laser treatment of central serous chorioretinopathy and under the guidance of FFA in the central serous chorioretinopathy laser treatment have the same curative ratio, has certain clinical value.
4.Expressions of Transferrin Receptor mRNA,Ferritin Receptor mRNA and Iron Regulatory Protein 1 mRNA in the Placentas Complicated with Fetal Iron Deficiency
chun-yan, LIU ; yu-feng, LIU ; shu-guang, ZHANG
Journal of Applied Clinical Pediatrics 2003;0(10):-
Objective To investigate the expressions of transferrin receptor (TfR) mRNA, ferritin(Fn) mRNA and iron regulatory proteinl (IRP-1) mRNA in the placentas complicated with fetal iron deficiency(ID). Methods Depending on the cord SF,the subjects were divided to fetal ID group and fetal iron sufficient( IS) group. TfR mRNA, Fn mRNA and IRP - 1 mRNA in placentas were measured by RT - PCR. Results 1. The expression of TfR mRNA in ID group was 1.10 ? 0. 26, it was significantly higher than that in IS group (t=0.028 P0.05) ;4. TfR mRNA and Fn mRNA correlated with fetal IS respectively. Conclusion Fetal ID induces highly expressed TfR mRNA and lower level of Fn mRNA to furthest satisfy the iron need for fetus.
5.Expression of Signal Transducers and Activator of Transcription 3 in Airway Epithelial Cells of Asthmatic Mouse Model and Its Role in Airway Remodeling
yan-ming, LIU ; guang-min, NONG ; shu-quan, LI
Journal of Applied Clinical Pediatrics 1994;0(04):-
Objective To study the expression of signal transducers and activators of transcription 3(STAT3) in airway epithelial cells of asthmatic mouse model and its association with airway remodeling,explore the role of signal-transduction pathway in airway remodeling.Methods Thirty Balb/c mice were randomly divided into normal control group(n=10),asthma without intervention group(n=10) and AG490 intervention group(n=10).The mice were sensitized with ovalbumin to establish the asthmatic model.The histological changes were evaluated by HE staining,total brochial wall thickness(Wat)and smooth muscle thickness(Wam) were measured by image analysis system,the percentages of collagen deposition were detected by Masson′s trichrome staining,the expression of STAT3 in airway were detected by immunohistochemistry technique;lung tissue extracts were analyzed for phosphorylation of STAT3(p-STAT3)by Western blot.SPSS 13.0 software was used to analyze the data.Results 1.The histological changes including airway thickness,airway smooth cell proliferation and excessive collagen deposition in subepithelial aera were found under light microscope in asthmatic mice.2.The level of STAT3 and p-STAT3 in asthma without intervention group were significantly higher than those in normal control group(Pa
6.Effects of Inhaled Budesonide in Early Phase on Airway Inflammation and Interleukin-6/Signal Transducers and Activators of Transcription 3 Signaling Pathway in Asthmatic Mouse
yan-ming, LIU ; guang-min, NONG ; shu-quan, LI
Journal of Applied Clinical Pediatrics 2006;0(16):-
Objective To observe the effects of inhaled budesonide (BUD) in early phase on the airway inflammation in asthmatic mouse,and its effects on the IL-6/signal transducers and activators of transcription 3(IL-6/STAT3 )signaling pathway in airway,explore the therapeutic target of BUD.Methods Forty Balb/c mice were randomly divided into control group(n=10),asthma group(n=10),BUD group(n=10) and AG490 group(n=10).The mice were sensitized with ovalbumin to establish the asthmatic model.The histological changes were evaluated by HE staining.The levels of IL-4,IL-5 and IL-6 in bronchoalveolar lavage fluid (BALF) were measured by enzyme-linked immunosorbent assay.Lung tissue extracts were analyzed for total STAT3 and phospho-STAT3(p-STAT3) by Western blot.Results 1.The levels of inflammatory cells,EOS%, IL-4,IL-5 and IL-6 levels in the BALF in BUD group were significantly lower than those in asthma group (Pa0.05).Conclusions Inhaled corticosteroid can apparently ameliorate airway inflammation in early phase in asthmatic mouse model,and it can downregulate the expressions of IL-6 and STAT3,inhibit the signal-transduction pathway of STAT3.The IL-6 /STAT3 signaling pathway of airway may be one of the potential therapeutic targets of inhaled corticosteroid.
7.Expression of hypoxia-inducible factor-1?,vascular endothelial growth factor and sFlt-1 in preeclampsia placenta
Shu-Guang SUN ; Na SHEN ; Yan-Hui ZHENG ; Tao SHANG ;
Chinese Journal of Obstetrics and Gynecology 2001;0(07):-
Objective To investigate the expression and correlation of hypoxia-inducible factor-1?(HIF-1?),vascular endothelial growth factor(VEGF)and sFlt-1 in the preeclampsia placenta,and discuss their significance in the pathogenesis of preeclampsia.Methods Placentas were collected from 20 pregnant women with preeclampsia as study group and 15 normal pregnant women as control group.The expressions of HIF-1?,VEGF and sFlt-1 protein were semi-quantitatively analyzed with immunohistochemical assay and mRNA level was determined using reverse transcription polymerasc chain reaction(RT-PCR)technique. Results(1)the expression of HIF-1?and sFlt-1 protein in preeclampsia group obviously increased.Strong (+++)positive expression was observed in 9 and 11 cases respectively,significantly higher than in control group(2 and 3 cases)(P<0.05),however,VEGF expression obviously reduced in preeclampsia group(P<0.01).(2)the level of HIF-1?and sFlt-1 mRNA in preeclamptic placenta was 0.604?0.013, 0.898?0.041,significantly higher than 0.208?0.007 and 0.559?0.244 in normal placenta(P<0.05). Although the level of VEGF mRNA increased in preeclampsia placenta,it was not significantly different from that in normal placenta(P>0.05).The ratio of VEGF mRNA/sFlt-1 mRNA obviously reduced in preeclampsia group and was significantly lower than in control group(P<0.05).(3)in preeclampsia group,HIF-1?mRNA expression was positively correlated with the expression of sFlt-1 mRNA(r=0.577, P<0.05),and negatively correlated with the ratio of VEGF mRNA/sFlt-1 mRNA(r=-0.376,P<0.05).Conclusion Abnormal high HIF-1?expression in preeclampsia placenta indicates that HIF-1?might play an important role in the pathogenesis of preeclampsia,possibly through affecting the cytotrophoblastic invasion and placental vascular reconstruction via the modulation of VEGF and sFlt-1 gene transcription.
9. Network pharmacological studies of Guanxin Qiwei tablet in treating coronary heart disease
Academic Journal of Second Military Medical University 2017;38(8):1075-1080
Objective To clarify the active ingredients of Guanxin Qiwei tablet, and to explore the potential target for its efficacy. Methods We studied the interaction between Chinese medicine ingredients in the Guanxin Qiwei tablet and the therapy targets using a network pharmacology model, which was developed by integrating oral bioavailability prediction, druggability analysis, principal component analysis, molecular docking simulation and network of pharmacophore-target-disease analysis. Results Eighteen principal compounds had high-degree network with 41 therapy targets for coronary heart disease (CHD), and had higher affinity with 18 potential targets via the calculation of molecular docking. Further analysis showed that 7 key targets were closely related to the treatment of CHD. Conclusion We have screened 18 possible active molecules in Guanxin Qiwei tablet and 7 key therapy targets, and preliminarily elucidate the molecular mechanism based on the “multi-ingredient, multi-target, and synergistic effect”.
10.Overexpression of PDZ1 domain of PSD-95 protein rescues hippocampal neurons from apoptosis induced by oxygen-glucose deprivation.
Shu-Qun HU ; Yan-Yan ZONG ; Guang-Yi ZHANG
Acta Physiologica Sinica 2008;60(6):730-736
To detect the effect of PDZ1, domain of postsynaptic density 95 (PSD-95), on apoptosis of hippocampal neurons induced by oxygen-glucose deprivation (OGD), Sprague-Dawley rat hippocampal neurons were infected with PDZ1-viruses after 21 days of plating. Twenty-four hours after infection, cells were treated with OGD for 1.5 h, then were incubated with DAPI and apoptosis-like cells were characterized, or were collected for co-immunoprecipitation and Western blot analyses. The results showed that: (1) PDZ1 overexpression was observed in hippocampal neurons; (2) Apoptosis induced by OGD was obviously decreased in neurons overexpressing PDZ1 (P<0.05); (3) Overexpression of PDZ1 prevented the binding of GluR6 to PSD-95; (4) Overexpression of PDZ1 inhibited MLK3 and JNK1/2 activation induced by OGD. These results indicate that overexpression of PDZ1 may prevent hippocampal neurons from apoptosis induced by OGD.
Animals
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Apoptosis
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Cells, Cultured
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Culture Media
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chemistry
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Disks Large Homolog 4 Protein
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Glucose
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chemistry
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Hippocampus
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cytology
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Intracellular Signaling Peptides and Proteins
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metabolism
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Membrane Proteins
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metabolism
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Neurons
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cytology
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pathology
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Oxygen
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chemistry
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PDZ Domains
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Rats
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Rats, Sprague-Dawley