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1.
Chinese Journal of Hepatology ; (12): 760-764, 2023.
Article in Chinese | WPRIM | ID: wpr-986208

ABSTRACT

Clinically, osteoporosis is often observed in combination with different disease states in patients with hepatitis B virus infection, but because of its complex pathogenesis, non-specific early clinical manifestations, and inadequate clinical attention, the patient's prognosis is frequently affected. This review summarizes the pathogenesis, diagnosis, and treatment of chronic hepatitis B virus infection-related osteoporosis in order to raise awareness of the disease.

2.
Journal of Forensic Medicine ; (6): 358-365, 2021.
Article in English | WPRIM | ID: wpr-985225

ABSTRACT

Objective To study the genetic polymorphism of whole mitochondrial DNA (mtDNA) genomes in She population in Zhejiang and to explore the maternal genetic structure of the She population. Methods Whole mtDNA genomes of 231 unrelated individuals from She population in Zhejiang Province were sequenced. The number of mutations and population genetics parameters such as, the haplotype diversity (HD), discrimination power (DP), and random match probabilities (RMP) were analyzed. The mtDNA haplogroups of Zhejiang She population were classified, and the maternal genetic relationships between She and nine other Chinese populations were estimated. Results In 231 Zhejiang She samples, 8 507 mutations (702 types) were observed and the samples were classified into 94 haplogroups. The HD, DP and RMP values were 0.998 6, 0.994 2 and 0.005 8, respectively. The lowest genetic differentiation degree (Fst=0.006 89) was detected between Zhejiang She population and southern Han population. Principal component analysis (PCA) and median-joining network analysis showed that the genetic distance of Zhejiang She population with Guangxi Yao, Yunnan Dai and Southern Han populations was relatively close, but the population still had some unique genetic characteristics. Conclusion The whole mtDNA genomes are highly polymorphic in Zhejiang She population. The Zhejiang She population contains complex and diverse genetic components and has a relatively close maternal genetic relationship with Guangxi Yao, Yunnan Dai and Southern Han populations. Meanwhile, Zhejiang She population has kept its unique maternal genetic components.


Subject(s)
Humans , Asian People/genetics , China , DNA, Mitochondrial/genetics , Ethnicity/genetics , Genetics, Population , Haplotypes , High-Throughput Nucleotide Sequencing , Polymorphism, Genetic
3.
Chinese Journal of Rehabilitation Theory and Practice ; (12): 156-160, 2020.
Article in Chinese | WPRIM | ID: wpr-905759

ABSTRACT

Objective:To analyze the results of Grading of Recommendations Assessment, Development and Evaluation (GRADE) for clinical practice guidelines of rehabilitation. Methods:Clinical practice guidelines of rehabilitation were systematically retrieved from PubMed, EMBASE, CNKI, China Biology Medicine disc, Wanfang database and the guideline-related websites until January 11, 2020. Two researchers independently screened guidelines using Grading of Recommendations Assessment, Development and Evaluation (GRADE), and extracted and analyzed the results. Results:A total of 83 clinical practice guidelines of rehabilitation were included, in which 46 (55.4%) applied grading systems. Only four (4.8%) guidelines applied GRADE, including 44 recommendations, in which 39 guidelines (88.6%) had quality of evidence. Among the evidences citied in the recommendations, low quality evidences were the most (34.1%); among the recommendations, weak recommendations were more (56.8%). The quality of strong recommendation supporting evidence was higher than that of weak recommendation (χ2 = 8.218,P < 0.05). Conclusion:The application of the GRADE grading system in clinical practice guidelines of rehabilitation remains to be improved. It is proposed for guideline makers to further implement the methodology of guidelines and GRADE to improve the reliability and applicability of the clinical practice guidelines of rehabilitation more effectively.

4.
Journal of Zhejiang University. Science. B ; (12): 990-998, 2020.
Article in English | WPRIM | ID: wpr-880740

ABSTRACT

Disulfide-bond A oxidoreductase-like protein (DsbA-L) is a molecular chaperone involved in the multimerization of adiponectin. Recent studies have found that DsbA-L is related to metabolic diseases including gestational diabetes mellitus (GDM), and can be regulated by peroxisome proliferator-activated receptor γ (PPARγ) agonists; the specific mechanism, however, is uncertain. Furthermore, the relationship between DsbA-L and the novel adipokine chemerin is also unclear. This article aims to investigate the role of DsbA-L in the improvement of insulin resistance by PPARγ agonists in trophoblast cells cultured by the high-glucose simulation of GDM placenta. Immunohistochemistry and western blot were used to detect differences between GDM patients and normal pregnant women in DsbA-L expression in the adipose tissue. The western blot technique was performed to verify the relationship between PPARγ agonists and DsbA-L, and to explore changes in key molecules of the insulin signaling pathway, as well as the effect of chemerin on DsbA-L. Results showed that DsbA-L was significantly downregulated in the adipose tissue of GDM patients. Both PPARγ agonists and chemerin could upregulate the level of DsbA-L. Silencing DsbA-L affected the function of rosiglitazone to promote the phosphatidylinositol 3-kinase (PI3K)-protein kinase B (PKB)/AKT pathway. Therefore, it is plausible to speculate that DsbA-L is essential in the environment of PPARγ agonists for raising insulin sensitivity. Overall, we further clarified the mechanism by which PPARγ agonists improve insulin resistance.

5.
Chinese Pharmacological Bulletin ; (12): 995-1000, 2019.
Article in Chinese | WPRIM | ID: wpr-857210

ABSTRACT

Aim To investigate the protective effect of resveratrol on oxidative stress injury of cardiomyocytes induced by high fat and its correlation with AMPK/mTC)RCl/p70S6K signaling pathway. Methods The model of cardiomyocyte lipotoxicity injury was established by palmitic acid (PA). Resveratrol pretreatment and MTT assay were used to detect cell proliferation. The expression of reactive oxygen species ( ROS) was detected by fluorescence and flow cytometry, and the levels of malondialdehyde (MDA) and the activity of superoxide dismutase (SOD) were detected by kit. The protein expression of AMPK/mTORCl/P70S6K signaling pathway and apoptosis related proteins were determined by Western blot. Results MIT results showed that the cell viability decreased significantly at 0. 4 mmol L-1 and 24 h-48 h stimulation time, re-spectively. Fluorescence and flow cytometry showed that the levels of ROS and MDA increased significantly and SOD activity decreased significantly when PA (0. 4 mmol • L"1) stimulated cells for 24 h compared with control group. Western blot showed that the expression of p-AMPK and Bcl-2 decreased and the expression of p-mTORCl, p-p70S6K, Bax and cleaved caspase-3 increased when PA (0.4 mmol • L"1) stimulated cells for 24 h compared with control group. Resveratrol pre-treatment could significantly reverse the above chan-ges. Conclusions Resveratrol can significantly inhibit the apoptosis of cardiomyocytes induced by high fat. Its mechanism may be related to the regulation of AMPK/mTORCl/p70S6K signaling pathway.

6.
Chinese journal of integrative medicine ; (12): 429-435, 2018.
Article in English | WPRIM | ID: wpr-691364

ABSTRACT

<p><b>OBJECTIVE</b>To investigate the effect and potential mechanisms of rutaecarpine (Rut) in a rat artery balloon-injury model.</p><p><b>METHODS</b>The intimal hyperplasia model was established by rubbing the endothelia with a balloon catheter in the common carotid artery (CCA) of rats. Fifty rats were randomly divided into five groups, ie. sham, model, Rut (25, 50 and 75 mg/kg) with 10 rats of each group. The rats were treated with or without Rut (25, 50, 75 mg/kg) by intragastric administration for 14 consecutive days following injury. The morphological changes of the intima were evaluated by hematoxylin-eosin staining. The expressions of proliferating cell nuclear antigen (PCNA) and smooth muscle (SM) α-actin in the ateries were assayed by immunohistochemical staining. The mRNA expressions of c-myc, extracellular signal-regulated kinase 2 (ERK2), MAPK phosphatase-1 (MKP-1) and endothelial nitric oxide synthase (eNOS) were determined by real-time reverse transcription-polymerase chain reaction. The protein expressions of MKP-1 and phosphorylated ERK2 (p-ERK2) were examined by Western blotting. The plasma contents of nitric oxide (NO) and cyclic guanosine 3',5'-monophosphate (cGMP) were also determined.</p><p><b>RESULTS</b>Compared with the model group, Rut treatment significantly decreased intimal thickening and ameliorated endothelial injury (P<0.05 or P<0.01). The positive expression rate of PCNA was decreased, while the expression rate of SM α-actin obviously increased in the vascular wall after Rut (50 and 75 mg/kg) administration (P<0.05 or P<0.01). Furthermore, the mRNA expressions of c-myc, ERK2 and PCNA were downregulated while the expressions of eNOS and MKP-1 were upregulated (P<0.05 or P<0.01). The protein expressions of MKP-1 and the phosphorylation of ERK2 were upregulated and downregulated after Rut (50 and 75 mg/kg) administration (P<0.05 or P<0.01), respectively. In addition, Rut dramatically reversed balloon injury-induced decrease of NO and cGMP in the plasma (P<0.05 or P<0.01).</p><p><b>CONCLUSION</b>Rut could inhibit the balloon injury-induced carotid intimal hyperplasia in rats, possibly mediated by promotion of NO production and inhibiting ERK2 signal transduction pathways.</p>


Subject(s)
Animals , Male , Actins , Metabolism , Carotid Arteries , Metabolism , Pathology , Carotid Artery Injuries , Drug Therapy , Genetics , Pathology , Cyclic GMP , Blood , Disease Models, Animal , Gene Expression Regulation , Hyperplasia , Indole Alkaloids , Pharmacology , Therapeutic Uses , Nitric Oxide , Blood , Phosphorylation , Proliferating Cell Nuclear Antigen , Metabolism , Quinazolines , Pharmacology , Therapeutic Uses , RNA, Messenger , Genetics , Metabolism , Rats, Sprague-Dawley , Tunica Intima , Pathology
7.
Chinese journal of integrative medicine ; (12): 359-365, 2018.
Article in English | WPRIM | ID: wpr-691363

ABSTRACT

<p><b>OBJECTIVE</b>To investigate the effects of evodiamine (Evo), a component of Evodiaminedia rutaecarpa (Juss.) Benth, on cardiomyocyte hypertrophy induced by angiotensin II (Ang II) and further explore the potential mechanisms.</p><p><b>METHODS</b>Cardiomyocytes from neonatal Sprague Dawley rats were isolated and characterized, and then the cadiomyocyte cultures were randomly divided into control, model (Ang II 0.1 μmol/L), and Evo (0.03, 0.3, 3 μmol/L) groups. The cardiomyocyte surface area, protein level, intracellular free calcium ([Ca]) concentration, activity of nitric oxide synthase (NOS) and content of nitric oxide (NO) were measured, respectively. The mRNA expressions of atrial natriuretic factor (ANF), calcineurin (CaN), extracellular signal-regulated kinase-2 (ERK-2), and endothelial nitric oxide synthase (eNOS) of cardiomyocytes were analyzed by real-time reverse transcriptionpolymerase chain reaction. The protein expressions of calcineurin catalytic subunit (CnA) and mitogen-activated protein kinase phosphatase-1 (MKP-1) were detected by Western blot analysis.</p><p><b>RESULTS</b>Compared with the control group, Ang II induced cardiomyocytes hypertrophy, as evidenced by increased cardiomyocyte surface area, protein content, and ANF mRNA expression; increased intracellular free calcium ([Ca]) concentration and expressions of CaN mRNA, CnA protein, and ERK-2 mRNA, but decreased MKP-1 protein expression (P<0.05 or P<0.01). Compared with Ang II, Evo (0.3, 3 μmol/L) significantly attenuated Ang II-induced cardiomyocyte hypertrophy, decreased the [Ca] concentration and expressions of CaN mRNA, CnA protein, and ERK-2 mRNA, but increased MKP-1 protein expression (P<0.05 or P<0.01). Most interestingly, Evo increased the NOS activity and NO production, and upregulated the eNOS mRNA expression (P<0.05).</p><p><b>CONCLUSION</b>Evo signifificantly attenuated Ang II-induced cardiomyocyte hypertrophy, and this effect was partly due to promotion of NO production, reduction of [Ca]i concentration, and inhibition of CaN and ERK-2 signal transduction pathways.</p>


Subject(s)
Animals , Angiotensin II , Atrial Natriuretic Factor , Metabolism , Calcineurin , Genetics , Metabolism , Calcium , Metabolism , Dual Specificity Phosphatase 1 , Genetics , Metabolism , Extracellular Signal-Regulated MAP Kinases , Genetics , Metabolism , Hypertrophy , Myocytes, Cardiac , Metabolism , Pathology , Nitric Oxide , Metabolism , Nitric Oxide Synthase Type III , Metabolism , Quinazolines , Pharmacology , RNA, Messenger , Genetics , Metabolism , Rats, Sprague-Dawley
8.
Chinese Medical Journal ; (24): 470-476, 2017.
Article in English | WPRIM | ID: wpr-303129

ABSTRACT

<p><b>BACKGROUND</b>Human U three protein 14a (hUTP14a) promotes p53 degradation. Moreover, hUTP14a expression is upregulated in several types of tumors. However, the expression pattern of hUTP14a in hepatocellular carcinoma (HCC) remains unknown. The aim of this study was to investigate hUTP14a expression and its prognostic value in HCC.</p><p><b>METHODS</b>The hUTP14a expression was evaluated using immunohistochemistry (IHC) in HCC tissue specimens. The correlations between hUTP14a expression and clinicopathological variables were analyzed. The Kaplan-Meier method was used to analyze the association between hUTP14a expression and survival. Independent prognostic factors associated with overall survival (OS) and disease-free survival (DFS) were analyzed using the Cox proportional-hazards regression model.</p><p><b>RESULTS</b>The IHC data revealed that the hUTP14a positivity rate in HCC tissue specimens was significantly higher than that in nontumorous tissue specimens (89.9% vs. 72.7%, P < 0.05). The hUTP14a expression was detected in both the nucleolus and the cytoplasm. The positivity rate of nucleolar hUTP14a expression in HCC tissue specimens was higher than that in the nontumorous tissue specimens (29.3% vs. 10.1%, P < 0.05). No significant difference was found between HCC and nontumorous tissue specimens of cytoplasmic hUTP14a expression (60.6% vs. 62.6%, P > 0.05). In addition, no significant correlation was found between nucleolar hUTP14a expression and other clinicopathological variables. The 5-year OS and DFS rates in patients with positive nucleolar hUTP14a expression were significantly lower than those in patients with negative hUTP14a expression (P = 0.004 for OS, P = 0.003 for DFS). Multivariate analysis showed that nucleolar hUTP14a expression was an independent prognostic factor for OS (P = 0.004) and DFS (P < 0.001).</p><p><b>CONCLUSIONS</b>The positivity rate of hUTP14a expression was significantly higher in HCC specimens. Positive expression of nucleolar hUTP14a might act as a novel prognostic predictor for patients with HCC.</p>


Subject(s)
Adult , Aged , Aged, 80 and over , Female , Humans , Male , Middle Aged , Biomarkers, Tumor , Genetics , Metabolism , Carcinoma, Hepatocellular , Metabolism , Mortality , Pathology , Disease-Free Survival , Immunohistochemistry , Kaplan-Meier Estimate , Liver Neoplasms , Metabolism , Mortality , Pathology , Multivariate Analysis , Prognosis , Proportional Hazards Models , Ribonucleoproteins, Small Nucleolar , Genetics , Metabolism
9.
Experimental & Molecular Medicine ; : e283-2017.
Article in English | WPRIM | ID: wpr-85455

ABSTRACT

We sought to identify common key regulators and build a gene-metabolite network in different nonalcoholic fatty liver disease (NAFLD) phenotypes. We used a high-fat diet (HFD), a methionine-choline-deficient diet (MCDD) and streptozocin (STZ) to establish nonalcoholic fatty liver (NAFL), nonalcoholic steatohepatitis (NASH) and NAFL+type 2 diabetes mellitus (T2DM) in rat models, respectively. Transcriptomics and metabolomics analyses were performed in rat livers and serum. A functional network-based regulation model was constructed using Cytoscape with information derived from transcriptomics and metabolomics. The results revealed that 96 genes, 17 liver metabolites and 4 serum metabolites consistently changed in different NAFLD phenotypes (>2-fold, P<0.05). Gene-metabolite network analysis identified ccl2 and jun as hubs with the largest connections to other genes, which were mainly involved in tumor necrosis factor, P53, nuclear factor-kappa B, chemokine, peroxisome proliferator activated receptor and Toll-like receptor signaling pathways. The specifically regulated genes and metabolites in different NAFLD phenotypes constructed their own networks, which were mainly involved in the lipid and fatty acid metabolism in HFD models, the inflammatory and immune response in MCDD models, and the AMPK signaling pathway and response to insulin in HFD+STZ models. Our study identified networks showing the general and specific characteristics in different NAFLD phenotypes, complementing the genetic and metabolic features in NAFLD with hepatic and extra-hepatic manifestations.


Subject(s)
Animals , Rats , AMP-Activated Protein Kinases , Complement System Proteins , Diabetes Mellitus , Diet , Diet, High-Fat , Insulin , Liver , Metabolism , Metabolomics , Models, Animal , Non-alcoholic Fatty Liver Disease , Peroxisomes , Phenotype , Streptozocin , Toll-Like Receptors , Tumor Necrosis Factor-alpha
10.
Chinese Journal of Natural Medicines (English Ed.) ; (6): 290-293, 2014.
Article in English | WPRIM | ID: wpr-812263

ABSTRACT

The incidence of diabetes has increased considerably, and become the third serious chronic disease following cancer and cardiovascular diseases. Though acarbose, metformin, and 1-deoxynojirimycin have good efficacy for clinical application as hypoglycemic drugs, their expensive costs and some degree of side effects have limited their clinical application. Recently, increasing attention has concentrated on the polysaccharides from natural plant and animal sources for diabetes. In order to illustrate the pharmaceutical activity of polysaccharides as natural hypoglycemic agents, polysaccharides isolated from Astragalus, oyster mushroom, and Yacon were evaluated for their inhibitory effects on α-glucosidase. Polysaccharides were extracted and purified from Astragalus, Oyster mushroom, and Yacon with hot water at 90 °C for 3 h, respectively. The total sugar content of the polysaccharide was determined by the phenol-sulfuric acid method. The α-glucosidase inhibitory activity was measured by the glucose oxidase method. The results exhibited that the inhibitory effects on α-glucosidase were in decreasing order, Astragalus > oyster mushroom > Yacon. The α-glucosidase inhibition percentage of Astragalus polysaccharide and oyster mushroom polysaccharide were over 40% at the polysaccharide concentration of 0.4 mg·mL(-1). The IC50 of Astragalus polysaccharide and oyster mushroom polysaccharide were 0.28 and 0.424 mg·mL(-1), respectively. The information obtained from this work is beneficial for the use polysaccharides as a dietary supplement for health foods and therapeutics for diabetes.


Subject(s)
Humans , Asteraceae , Chemistry , Astragalus Plant , Chemistry , Diabetes Mellitus , Drugs, Chinese Herbal , Chemistry , Pharmacology , Glycoside Hydrolase Inhibitors , Chemistry , Pharmacology , Pleurotus , Chemistry , Polysaccharides , Chemistry , Pharmacology , alpha-Glucosidases , Chemistry
11.
China Journal of Chinese Materia Medica ; (24): 3424-3431, 2013.
Article in Chinese | WPRIM | ID: wpr-291352

ABSTRACT

<p><b>OBJECTIVE</b>To investigate the effect of intracellular and extracellular Ca2+ on the biosynthesis of rosmarinic acid (RA) induced by salicylic acid in young seedlings of Salvia miltiorrhiza.</p><p><b>METHOD</b>Young seedlings of S. miltiorrhiza were used to select an optimal concentration of salicylic acid (SA), and then use the optimal concentration of SA to investigate the effects of extracellular Ca2+ channel inhibitors Verapamil, LaCl3, intracelluar calmodulin antagonist TFP and intracelluar Ca2+ channel inhibitors LiCl on the biosynthesis of RA and related enzymes.</p><p><b>RESULT</b>SA increased the accumulation of RA and the activities of PAL and TAT, especially the SA of 2 mmol x L(-1) after 24 h. SA improved the accumulation of RA to (40.51 +/- 2.16) mg x g(-1), which was 1.97 times than that of control, and the activities of PAL, TAT were 1.42 times and 1.29 times than those of the control. However, Vp, LaCl3, TFP, LiCl inhibited the effects of SA evidently.</p><p><b>CONCLUSION</b>Ca2+ plays a key role in the regulation of the induction process.</p>


Subject(s)
Calcium , Metabolism , Cinnamates , Metabolism , Depsides , Metabolism , Gene Expression Regulation, Plant , Plant Proteins , Genetics , Metabolism , Salicylic Acid , Metabolism , Salvia miltiorrhiza , Genetics , Metabolism , Seedlings , Genetics , Metabolism
12.
West China Journal of Stomatology ; (6): 206-209, 2009.
Article in Chinese | WPRIM | ID: wpr-248271

ABSTRACT

<p><b>OBJECTIVE</b>To investigate the pathogenicity of matrix metalloproteinase 8, 9 (MMP-8, MMP-9) regulations of polymorphonuclear leukocytes (PMNs) by challenge of Porphyromonas gingivalis (P. gingivalis) with different fimA genotypes.</p><p><b>METHODS</b>The studies mainly adopt the isopycnic sedimentation separation to separate the PMNs from human peripheral blood. P. gingivalis ATCC 33277 (type I), WCSP 115 (type II), WCSP 1.5 (type III), W83 (type IV), WCSP 559 (type IV) were assessed for their inductions of MMP-8, MMP-9 expression in PMNs. MMP-8, MMP-9 protein levels in culture supernatant were determined by ELISA at different time intervals (5 min, 30 min, 1 h, 2 h) following continuous co-culture of bacteria with PMNs.</p><p><b>RESULTS</b>MMP-8 and MMP-9 protein levels produced by PMNs co-culture with the I fimA-IV fimA P. gingivalis were significantly stronger than unsimulated group. The velocity and quantity of MMP-8 produced by PMNs co-culture with the II fimA P. gingivalis and IV fimA P. gingivalis were more than III fimA, IVfimA P. gingivalis. The MMP-9 protein levels produced by PMNs co-culture with the I fimA, II fimA, IV fimA P. gingivalis was significantly stronger than III fimA and IV fimA P. gingivalis.</p><p><b>CONCLUSION</b>II fimA and IV fimA P. gingivalis have stronger pathogenicity relatively, which indicate that fimA genotype is associated with pathogenesis of P. gingivalis.</p>


Subject(s)
Humans , Coculture Techniques , Fimbriae Proteins , Genotype , Matrix Metalloproteinase 8 , Neutrophils , Porphyromonas gingivalis
13.
Chinese Journal of Stomatology ; (12): 269-272, 2008.
Article in Chinese | WPRIM | ID: wpr-235924

ABSTRACT

<p><b>OBJECTIVE</b>To investigate the mechanism of monocyte chemoattractant protein-1 (MCP-1) regulations of human gingival fibroblasts (HGF) by challenge of Porphyromonas gingivalis (Pg) with different fimA genotypes.</p><p><b>METHODS</b>Pg ATCC 33277 (type I), WCSP115 (type II), WCSP1.5 (type III), W83 (type IV) were assessed for their inductions of MCP-1 expression in HGF. MCP-1 mRNA levels of HGF were determined by real-time RT-PCR and MCP-1 protein levels in culture supernatant by ELISA at different time intervals (1 h, 3h, 6h and 12h) following continuous co-culture of bacteria with HGF.</p><p><b>RESULTS</b>MCP-1 mRNA and protein levels were both up-regulated when HGF co-cultured with different Pg fimA genotypes. Type II was stronger than other fimA genotypes, HGF expressed significantly great amount of MCP-1 mRNA [(25.75 +/- 3.12)-(326.69 +/- 35.35)] and protein [(178.20 +/- 46.20)-(443.46 82.19) ng/L] for different time periods; While Type III was weaker than other fimA genotypes, and the level of MCP-1 mRNA was [ (4.16 +/- 0.82)-(94.17 +/- 18.56)] and protein [(86.95 +/- 23.90)-(264.01 +/- 28.59) ng/L](P < 0.05).</p><p><b>CONCLUSIONS</b>fimA genotypes of Pg are related with the inductions of MCP-1, which might indicate fimA genotype is associated with pathogenesis of Pg.</p>


Subject(s)
Humans , Cells, Cultured , Chemokine CCL2 , Metabolism , Fibroblasts , Metabolism , Fimbriae Proteins , Genetics , Genotype , Gingiva , Cell Biology , Microbiology , Porphyromonas gingivalis , Genetics
14.
West China Journal of Stomatology ; (6): 652-655, 2008.
Article in Chinese | WPRIM | ID: wpr-248334

ABSTRACT

<p><b>OBJECTIVE</b>The expression of heterogenic virulence properties depends on its clonal diversity. The aim of the study was to investigate the mechanism of interleukin-8 (IL-8) regulations of oral epithelial cells by challenge of Porphyromonas gingivalis (P. gingivalis) with different fimA genotypes, discuss the relation between fimA genotype and its pathogenicity.</p><p><b>METHODS</b>P. gingivalis ATCC 33277 (type I), W83 (type IV), 47A-1 (type IV) were assessed for their inductions of IL-8 expression in human oral epithelial cells (KB cell line, ATCC CCL-17). KB cells without stimulation of P. gingivalis were used as control group. IL-8 mRNA expression was de termined by reverse transcription polymerase chain reaction (RT-PCR) at different time intervals (1, 3, 6, 24 h) following continuous co culture of bacteria with KB cell line, and IL-8 protein levels in culture supernatant was determined by enzyme-linked immunosorbent assay.</p><p><b>RESULTS</b>IL-8 mRNA levels were up-regulated and reached its high peak at 1 h following both genotypes infection, then decreased to base level till 24 h. Attenuation of IL-8 protein levels was down-regulated when KB cell co-cultured with both genotypes for 3 h till 24 h, and type IV was lower than type I. IL-8 and IL-6 mRNA expression were not consistent with their protein levels, which indicated post-transcriptional regulations.</p><p><b>CONCLUSION</b>fimA genotypes of P. gingivalis are related with the effect of IL-8 inductions, which indicates fimA genotype is associated with pathogenesis of P. gingivalis.</p>


Subject(s)
Humans , Cells, Cultured , Coculture Techniques , Epithelial Cells , Genotype , Interleukin-6 , Interleukin-8 , Porphyromonas gingivalis
15.
Chinese Journal of Stomatology ; (12): 481-484, 2005.
Article in Chinese | WPRIM | ID: wpr-303462

ABSTRACT

<p><b>OBJECTIVE</b>To investigate the influence of a broad range of environmental conditions on initial rates of hydrogen peroxide produced by Streptococcus oralis (S. oralis).</p><p><b>METHODS</b>For each rate measurement, 1 ml aliquots of 10(12) cells/L mid-logarithmic phase S. oralis in TSBY were centrifuged and respectively washed by phosphate buffer containing 0.01-10 mmol/L glucose or sucrose, phosphate buffer with 5.0-7.5 pH or Bis-Tris buffer containing 0.01-100 mmol/L Ca(2+), 0.01-100 mmol/L F(-) or 0.01-100 mmol/L HFPO(3)(-). After S. oralis was cultured in respective buffer for 10, 20 and 30 min at 37 degrees C, the concentration of hydrogen peroxide in supernatant was assayed spectrophotometrically in 96-well micro-plate by ABTS-HRP at A(405).</p><p><b>RESULTS</b>Synthesis rate of hydrogen peroxide by S. oralis was 7.48 micromol/L per minute without carbohydrate, the synthesis rate of hydrogen peroxide by S. oralis increased with 0.01-10 mmol/L glucose and 0.01-10 mmol/L sucrose, but there was no statistically significant difference in synthesis rate among the carbohydrate groups. The rates of H2O2 synthesis were inhibited in the buffer at pH 5.0-6.0, compared with pH 7.0 (P < 0.05). Ca(2+) had little influence on the rate of H2O2 synthesis. IC(50) of H2O2 synthesis rates by S. oralis responded to FHPO(3)(-) and F(-) were 12.65 mmol/L and 1.90 mmol/L respectively.</p><p><b>CONCLUSIONS</b>Environmental conditions may influence the synthesis rate of H2O2 by S. oralis.</p>


Subject(s)
Culture Media , Chemistry , Glucose , Hydrogen Peroxide , Metabolism , Hydrogen-Ion Concentration , Metals, Heavy , Streptococcus oralis , Metabolism
16.
West China Journal of Stomatology ; (6): 320-322, 2004.
Article in Chinese | WPRIM | ID: wpr-330055

ABSTRACT

<p><b>OBJECTIVE</b>Quantitative study of the effect of anti-human VEGF mAb E11 to VEGF level in serum of nude mice transplanted buccal carcinoma.</p><p><b>METHODS</b>E11 was administered into BALB/c nu/nu mice which were transplanted human buccal carcinoma. The saline was administrated as negative control. Mice were killed at 18 days. The VEGF level in serum of mice was determined by improved indirect ELISA.</p><p><b>RESULTS</b>Compared with the VEGF level in serum of mice in saline group, it was dramatically decreased in E11 group. The VEGF level in serum of mice treated E11 by subcutaneous was lowest and only reached (1.17 +/- 0.13) microg/L.</p><p><b>CONCLUSION</b>It demonstrated that the anti-human VEGF mAb could reduce the VEGF level in serum by binding VEGF, and block its biological activity. It indicates that VEGF in serum of malignant tumor patient is a new tumor marker.</p>


Subject(s)
Animals , Humans , Antibodies, Monoclonal , Pharmacology , Biomarkers, Tumor , Blood , Carcinoma , Blood , Mice, Inbred BALB C , Mice, Nude , Mouth Mucosa , Pathology , Neoplasm Transplantation , Neoplasms , Blood , Vascular Endothelial Growth Factor A , Blood
17.
Chinese Journal of Medical Genetics ; (6): 294-296, 2004.
Article in Chinese | WPRIM | ID: wpr-328892

ABSTRACT

<p><b>OBJECTIVE</b>To investigate the genetic polymorphism of microsatellite in the exon 5 of MICA gene and the intron 1 of MICB gene in Guangdong Han population.</p><p><b>METHODS</b>One hundred and six samples of Guangdong Han population were genotyped by polymerase chain reaction and fluorescent technique (6-FAM). Gene frequency, power of discrimination, expected heterozygosity, polymorphism information content and probability of paternity exclusion were calculated.</p><p><b>RESULTS</b>The genotype distributions of MICA and MICB microsatellite met Hardy-Weinberg equilibrium. MICA A5 was the most common allele (0.2877), whereas A4 was the least popular one (0.1321). The genotype distribution frequencies of A5-5.1 (14.15%) and A5-5 (10.38%) are high. MICB CA14 was the most common allele (0.3255), and CA19,28 was the least popular one (0.0047). CA27 was not observed. The genotype distribution frequency of CA14-CA14(14.15%) is high.</p><p><b>CONCLUSION</b>The microsatellite of the exon 5 of MICA gene and the intron 1 of MICB gene could be used as the genetic markers of Chinese population in the studies of anthropology, linkage analysis of genetic disease genes, individual identification and paternity test in forensic medicine.</p>


Subject(s)
Humans , China , Ethnology , Histocompatibility Antigens Class I , Genetics , Microsatellite Repeats , Polymorphism, Genetic
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