The clinical characteristics and surgical prognosis of Beh?et′s disease with heart valve involvement and literature review / 中华风湿病学杂志

Objective:To investigate the clinical characteristics and treatment of Beh?et′s disease complicated with cardiac valve involvement.Methods:We searched the wanfang medical database and Medline database to reviewed the domestic and foreign literature reports on cardiac Beh?et′s disease and analyzed their clinical features and therapeutic strategies. Chi-squared test was used for data analysis.Results:It was shown that Beh?et′s disease with cardiac valve involvement mainly affect men. The male to female ratio was 3.86∶1 in China and 2.50∶1 in foreign patients( χ2=1.32, P=0.251). The preoperative diagnosis rate was not high(60.3% in China, 57.1% abroad) ( χ2=0.13, P=0.716). Aortic valve and perivalvular lesions were the most common involved sites, of which aortic regurgitation was the most frequenty occurred, followed by mitral valve lesions. Glucocorticoids was still the main means treatment for medical(93/235 in China, 28/420 abroad), cyclophosphamide was more widely used in China(28/235), azathioprine was more widely used in foreign countries (12/42). Aortic replacement (AVR) was the mainly surgical approach, followed by artificial aortic valve replacement and left ventricular outflow tract plasty (Bentall).The incidence of postoperative perivalvular leakage or valve prolapse was higher with AVR than with Bentall(AVR 76.3%/Bentall 21.8% at home, χ2=32.60, P<0.001, AVR 71.4%/Bentall 0 abroad, χ2=13.84, P<0.001). Conclusions:Cardiac valve involvement is a severe complication of Beh?et′s disease. Heart involvement are more common, and the preoperative diagnosis rate is lower in China. The incidence of perivalve leakage (PVL) or valve prolapse (PD) after operation is higher with AVR than with Bentall surgery.The Bentall operation could improve prognosis and the postoperative complications abroad are lower than domestic.

Effects of modified radical prostatectomy via an extraperitoneal approach on urinary control and sexual function in patients with prostate cancer / 中国基层医药

Objective:To investigate the effects of modified radical prostatectomy via an extraperitoneal approach on urinary control and sexual function in patients with prostate cancer.Methods:Fifty-six patients with stable prostate cancer who received treatment in Deqing People's Hospital between March 2015 and March 2018 were included in this study. They were randomly divided into observation and control groups ( n = 28/group). The observation group was subjected to modified radical prostatectomy via an extraperitoneal approach. The control group underwent standard laparoscopic surgery. Clinical efficacy and the effects of modified radical prostatectomy via an extraperitoneal approach on urinary control and sexual function were compared between the two groups. Results:Amount of blood loss and postoperative drainage were (125.39 ± 11.12) mL and (65.39 ± 10.12) mL in the observation group, and (224.79 ± 14.01) mL and (104.79 ± 15.01) mL in the control group. There were no significant differences in amount of blood loss and postoperative drainage between the two groups ( t = 18.83, 15.67, both P < 0.05). At 1, 3 and 6 months after surgery, the percentage of patients who had urinary control recovery in the observation group was 53.57% (15/28), 78.57% (22/28), 98.21% (27/28), respectively, which were significantly higher than those in the control group [21.43% (6/28), 35.71% (10/28), 67.86% (19/28), χ2 = 4.12, 7.21, 5.01, all P < 0.05]. At 1, 3 and 6 months after surgery, the score of erectile function recovery in the observation group was (15.98 ± 0.28) points, (15.99 ± 0.72) points, and (18.91 ± 0.48) points, which were significantly higher than those in the control group [(17.11 ± 0.34) points, (13.11 ± 0.48) points, (13.41 ± 0.39) points, t = 3.01, 12.89, 15.78, all P < 0.05]. Conclusion:Modified radical prostatectomy via an extraperitoneal approach can improve postoperative urinary control and sexual dysfunction.

Leptin dysregulated immune responses of B cells in patients with systemic lupus erythematosus / 中华风湿病学杂志

Objective:To explore the effect of leptin on B cells in patients with systemic lupus erythematosus (SLE).Methods:Peripheral blood mononuclear cells (PBMCs) were isolated from SLE patients, and then CD19 + B cells were purified with magnetic bead sorting method. PBMCs or purified B cells were cultured with recombinant leptin at 0, 100, 250 ng/ml for 3 or 5 days. The frequencies of plasma cells, follicular helper T (Tfh) cells and peripheral helper T (Tph) cells, as well as activation markers (CD80, CD86) and leptin receptor and the proliferation of B cells were determined with flow cytometry. The concentrations of antibodies and cytokines were examined with enzyme-linked immunosorbnent assay (ELISA). Data were analyzed with t test and analysis of variance (ANOVA). Results:Increased levels of leptin were positively correlated with systematic lupus erythematosus disease activity index (SLEDAI) and the frequency of plasma cells in SLE patients. Leptin receptor could be detected on SLE B cells, and recombinant leptin elevated the levels of its receptor on CD19 + B cells [(7.8±1.3)% vs (6.1±0.9)%, t=3.36, P=0.006]. Leptin enhanced the expression of CD80 [(21±4)% vs (19±4)%, t=2.84, P=0.004] and CD86 [(22±4)% vs (19±4)%, t=4.92, P=0.004] on SLE B cells in vitro. It also promoted B cells to differentiate into plasma cells [(7.6±1.5)% vs (5.2±1.3)%, t=6.42, P=0.025]. There was no statistical significant difference of the effect of leptin on B cell proliferation. Leptin also increased the levels of antibodies [IgG: (62±3) ng/ml vs (45±4) ng/ml, t=7.75, P<0.001; IgM: (112±24) ng/ml vs (56±18) ng/ml, t=5.38, P<0.001] and inflammatory cytokines [IL-6: (24±5) pg/ml vs (20±5) pg/ml, t=4.09, P=0.002; TNF-α: (19.1±3.8) pg/ml vs (14.1±2.9) pg/ml, t=3.38, P=0.006; IL-10: (24±5) pg/ml vs (20±5) pg/ml, t=4.09, P=0.002] secreted by B cells. In addition, leptin significantly upregulated the frequencies of Tfh cells[(2.82±0.49)% vs (1.28±0.20)%, t=4.56, P=0.001] and Tph cells [(4.5±0.5)% vs (3.4±0.4)%, t=3.88, P=0.003]. Conclusion:Leptin could directly promote the activation, differentiation and secretory capacity of B cells by binding to its receptor, and also modulate B cell responses indirectly via enhancement of Tfh and Tph cells, which may be involved in the pathogenesis of SLE.

Norlichexanthone purified from plant endophyte prevents postmenopausal osteoporosis by targeting ER

Although different types of drugs are available for postmenopausal osteoporosis, the limitations of the current therapies including drug resistances and adverse effects require identification of novel anti-osteoporosis agents. Here, we defined that norlichexanthone (NOR), a natural product, is a ligand of estrogen receptor-alpha (ER

Clinical feature analysis of 6 cases of delayed diagnosis of anti-synthetase antibody syndrome / 中华风湿病学杂志

Objective:To improve the diagnosis of anti-synthetase antibody syndrome(ASS) by analyzing the clinical features of 6 patients.Methods:Six cases of ASS with complete data were included in this study as they were diagnosed or other CTD during the period of hospitalization in Wuxi People's Hospital from January 2016 to February 2020. Their clinical and laboratory characteristics, and follow-up information were analyzed. Features and changes in the course of disease were analyzed.Results:Four out of 6 patients were females, with age of disease onset as 34-72 years, and an interval of 4-59 months from the first diagnosis to the diagnosis of ASS. The first diagnosis was Sjogren's syndrome (SS) in 2 cases, rheumatoid arthritis (RA) in 1 case, mixed connective tissue disease (MCTD) in 1 case, systemic sclerosis (SSc) in 1 case, and undifferentiated connective tissue disease (UCTD) in 1 case. At the first diagnosis, 5 cases had dry cough and/or dyspnea, followed by fever (4 cases), arthritis and Raynaud's phenomenon (3 cases). Anti-nuclear antibody(ANA), which was more common in cytoplasmic type, and anti-SSA/52 000 antibody were mostly positive(5 cases). The presence of non-specific interstitial pneumonia (NSIP) pattern (6 cases) in high resolution CT(HRCT) was found at the initial diagnosis. During follow-up, patients developed repeated liver function or muscle enzyme abnor-malities (3 cases), mechanic's hand (MH) (3 cases), and lung interstitial disease progression (4 cases). The myositis antibodies were found to be positive.Conclusion:ASS can occur in the course of or at the same time as other CTDs. ASS should be considered in patients with interstitiallung disease (ILD) (especially NSIP pattern) in HRCT, and/or positive of cytoplasmic type ANA and/or anti-SSA/52 000 antibodies At the same time, if repeated liver function or muscle enzyme abnormalities, new onset of MH, and lung interstitial disease progresses during treatment, consideration may be given to the possibility of complicated ASS. Myositis-specific antibodies are helpful in the diagnosis of ASS.

Clinical characteristics and outcomes of 7 patients with lupus podocytopathies / 中华风湿病学杂志

Objective:To investigate the clinical, treatment responses and outcomes of SLE patients with lupus podocytopathy (LP).Methods:Seven hospitalized cases in Wuxi people's hospital were diagnosed with LP based on the renal biopsy study during January 2011 to May 2019. Their clinical, immunological and pathological features, treatment responses and prognosis were analyzed.Results:Six cases were women. The mean onset age was (33±12), and the mean duration of systemic lupus erythematosus (SLE) was (69±64) months. Among these patients, 3 cases were initially diagnosed of SLE, and 6 with kidney damage caused by SLE. Six cases presented as nephrotic syndrome (NS) in which 2 cases were complicated with acute kidney injury(AKI). The extrarenal manifestations were not parallel to the renal manifestations as the positive rate of autoantibody and the incidence of hypocomplementemia were both low. After treatments with glucocorticoids and immunosuppressants, renal disease of 6 cases was improved. During follow-up, 2 cases developed renal disease recurrence.Conclusion:LP tends to occur in women in reproductive age, and NS or AKI is the main clinical manifestations. Renal manifestations are not parallel to extra-renal manifestations. Glucocorticoids and immunosuppressive therapy is sensitive, and some patients may relapse after treatment.

Clinical features and predictions of in-hospital mortality in 91 patients with systemic lupus erythematosus / 中华风湿病学杂志

Objective To explore the clinical characteristics and prognostic indicators that classify patients with systemic lupus erythematosus (SLE) at risk of in-hospital mortality.Methods Medical records of 1611 SLE patients admitted between 1999-2009 were collected from 26 centers across Jiangsu province,and patients were divided into two groups based on the outcomes.The suspected risk factors of poor outcomes were selected and then analyzed by chi-square test,independent-samples t test,Wilcoxon rank sum test and Logistic regression.Results Among the 1 611 enrolled patients,91 patients were in the death group (5.6％) and 1 520 patients in the control group (94.4％).The duration of disease [28(4,60) m vs 12(2,47) m,Z=-3.290,P＜0.05),the rate of male/female (13.2％ vs 7.1％,x2=4.606,P＜0.05),as well as the occurrence rateof seizure (8.8％ vs 1.7％,x2=17.550,P＜0.05),psychosis (41.8％ vs 23.8％,x2=14.809,P＜0.05),lupus headache (19.8％ vs 6.0％,x22=-25.898,P＜0.05),alopecia (47.3％ vs 30.3％,x2=11.541,P＜0.05),pericarditis (35.2％ vs 22.0％,x2=8.408,P＜0.05),myocarditis (4.4％ vs 1.0％,x2=5.885,P＜0.05),fever (55.0％ vs 28.5％,x2=28.632,P＜0.05),decreased hemoglobin levels (60.9％ vs 44.8％,x2=8.603,P＜0.05),urinary casts (24.2％ vs 12.2％,x2=10.884,P＜0.05),hematuria (51.7％ vs 37.8％,x2=6.988,P＜0.05),decreased estimate glomerular filtration rate (eGFR)levels (27.6％ vs 11.0％,x2=18.12,P＜0.05),and elevated glutamic-oxaloacetic transaminase (AST) levels (30.2％ vs 17.9％,x2=8.176,P＜0.05) were higher in the death group.The frequency of arthritis (34.3％ vs 18.7％,x2=9.459,P＜0.05),proteinuria (31.6％ vs 14.3％,x2=12.169,P＜0.05),elevated erythrocyte sedimentation rate (ESR) levels (80.4％ vs 71.8％,x2=4.192,P＜0.05),decreased complement levels (44.2％ vs 17.6％,x2=24.881,P＜0.05) and anti-dsDNA antibodies positivity rate (39.7％ vs 23.1％,x2=9.963,P＜0.05) were higher in the control group.Logistic regression analysis showed seizure [OR =4.035,95％ CI(1.338,12.164),P＜0.05],lupus headache [OR=3.026,95％CI (1.406,6.511),P＜0.05],decreased hemoglobin (Hb) levels [OR =2.116,95％ CI(1.139,3.934),P＜0.05],decreased eGFR levels [OR =2.159,95％ CI(1.0 11,4.610),P＜0.05] and fever [OR=2.567,95％CI (1.422,4.634),P＜0.05] were positively correlated with in-hospital mortality,with elevated ESR levels [OR=0.418,95％CI (0.218,0.802),P＜0.05] and decreased complement levels [OR=0.328,95％CI (0.120,0.894),P＜0.05] negatively correlated (P＜0.05).Conclusion The results sugest that seizure,lupus headache,decreased Hb levels,decreased eGFR levels and fever are the most important predictors of in-hospital mortality.Clinicians should pay more attention to these symptoms in admission.

Correlation between white matter microstructural integrity and cognitive function in patients with hypertension / 国际脑血管病杂志

Objective To investigate the effect of hypertension on white matter microstructure and its correlation with cognitive function using automated fiber-tract quantification.Methods Consecutive subjects visited Drum Tower Hospital,the Affiliated Hospital of Nanjing University Medical School between January 2017 and July 2018 were collected.They were divided into hypertension without cognitive impairment (HTN-nonCI) group (n =44),hypertension with cognitive impairment (HTN-CI) group (n =50),and control group (n =25).The imaging data and neuropsychological scale test results of the subjects were collected.The automated fiber-tract quantification was used to obtain the diffusion parameters of 100 nodes on 20 fiber tracts in the whole brain.The differential segments of each fiber tract diffusion parameter between the control group and HTN-nonCI group,and the HTN-nonCI group and HTN-CI group were compared.Correlation analysis was performed in white matter fiber tracts with significant differences and each cognitive domain between the HTN-nonCI group and the HTN-CI group.Results The fractional anisotropy (FA) of white matter fiber tracts in 3 groups showed a decreasing trend,and the mean diffusion diffusivity (MD) showed an increasing trend.The comparison between the control group and the HTN-nonCI group showed that there were significant differences in the FA values of the midpoint of left thalamic radiation tract partial to brainstem,the genus of corpus callosum near brainstem,and frontal part and and proximal ventricle of splenium of corpus callosum (all P＜0.05);there were significant differences in the MD values of the middle part of left thalamic radiation tract and near the brainstem,the right thalamic radiation tract near the brainstem,the top of left corticospinal tract and near brainstem,the middle hippocampus of right cingulate tract,the middle part of genu of corpus callosum,the splenium of the corpus callosum near the lateral ventricle,the left uncinate tract near the forehead (all P ＜ 0.05).A comparison between the HTN-nonCI group and the HTN-CI group showed that there was significant difference in the FA value between the distributed segments of cingulate gyrus of left cingulate tract and the left inferior fronto-occipital tract near the occipital lobe,in which cingnlate gyrus of left cingulate tract was significantly correlated with the Montreal Cognitive Assessment Scale score (standardized3 =0.268,P =0.029);there were significant differences in the right thalamic radiation tract near the brainstem,the forehead and proximal ventricle of splenium of the corpus callosum,and the scattered distribution segments of the right inferior longitudinal fasciculus,in which the right inferior longitudinal fasciculus was significantly correlated with memory (standardizedβ=-0.243,P=0.047) and executive function (standardizedβ=-0.284,P=0.021).Conclusions Microstructural integrity of white matter was generally destroyed in patients with hypertension,but some segments were more susceptible to hypertension.The integrity of cingnlate gyrus of cingulate tract was significantly correlated with the overall cognitive function.The integrity of inferior iongitudinal fasciculus was significantly correlated with the executive function and memory.

The effects of leptin on the senescence of bone marrow-derived mesenchymal stem cells, frequencies of immune cells and lupus disease in MRL/Ipr mice / 中华风湿病学杂志

Objective To explore the effects of leptin on the senescence of bone marrow-derived mesenchymal stem cells,frequencies of Treg and Th17 cells,and lupus disease in MRL/lpr mice,and to explore the pathogenesis of systemic lupus erythematosus (SLE).Methods Leptin (1 μg/g) or phosphate buffer saline (PBS) was injected into C57BL/6 (B6) mice,ob/ob mice and MRL/lpr mice intra-peritoneally.Urine protein was examined by Coomassie brilliant blue method.The levels of serum leptin,antinuclear antibody (ANA),anti-dsDNA antibody and immunoglobulin (Ig)G were detected by enzyme linked immunosorbent assay (ELISA).Bone marrow derived mesenchymal stem cells (MSCs) were isolated,and treated with or without leptin,then the senescence of MSCs were evaluated by SA-β-gal staining,the levels of p53 and p21 mRNA were measured by real time polymerase chain reaction (PCR),the protein levels of p53 and p21 were tested by Westem blotting method.Data were analyzed with t test and ANOVA.Results The level of serum leptin was higher in MRL/lpr mice than that of B6 mice [(4.5±0.8) ng/ml vs (2.3±0.5) ng/ml,t=2.38,P＜0.05].Leptin treatment in vivo accelerated the senescence of bone marrow-derived MSCs from all B6 mice,lupus mice and ob/ob mice,manifestedas increased frequencies of SA-β-gal positive cells [(20.6±0.6)％ vs (15.4±1.6)％,t=8.09,P＜0.05],higher levels of mRNA and p53 and p21 protein.Leptin treatment in vivo also down-regulated the frequency of Treg cells [(2.77±0.23)％ vs (5.01±0.18)％ t=3.91,P＜0.01],and up-regulated Th17 cells [(2.24± 0.11)％ vs (1.74±0.07)％,t=5.013,P＜0.01].The titer of ANA was further increased in leptin-treated MRL/lpr mice [(288±69) U/ml vs (190±90) U/ml,t=2.84,P＜0.05].The levels of serum anti-dsDNA antibody were also remarkably elevated [(12 399±1 237) U/ml vs (6 217±1 304) U/ml,t=3.44,P＜0.01].Leptin could increase the secretion of total IgG [MRL/Ipr (27.2±2.9) mg/ml vs (25.0±3.3) mg/ml,t=3.07,P＜0.05].The proteinuria concentration was increased in lupus mice [(1.00±0.10) mg/ml vs (0.81 ±0.06) mg/ml,t=3.31,P＜0.05],demonstrating that leptin accelerates lupus nephritis.Conclusion Leptin administr-ation in vivo enhances the senescence of bone marrow derived MSCs,dys-regulate of Treg/Th17 cells from MRL/Ipr mice,which impaires the role of immuno-modulation,and aggravates the progress of lupus disease.

Effect of sera from SLE patients on senescence of bone marrow-derived mesenchymal stem cells and its mechanism / 中国免疫学杂志

Objective:To explore whether sera from patients with systemic lupus erythematosus affect the senescence of MSCs, and which signaling pathway might be involved in.Methods: Human sera were collected from sex-matched,age-matched active SLE patients (n=6) and healthy volunteers (n=6).Then the complement was inactivated at 56℃ for 30 min.MSCs were cultured in DMEM/F12 containing 10% SLE or normal serum.Three days later MSCs were stained with SA-β-gal.The percentages of SA-β-gal positive cells were evaluated.The mRNA levels of p53 and p21 were detected by Real time PCR.The protein levels of p53/p21 and NF-κB ( p65) were examined by Western blot.Cell proliferation was evaluated by CCK8 assay.Results: Compared with normal serum, MSCs from either healthy controls or SLE patients showed more SA-β-gal positive cells in SLE serum,as well as higher levels of p53/p21.In addition,SLE serum also inhibited the capacity of MSC proliferation.In MSCs treated with SLE serum, the level of NF-κB (p65) protein was significantly upregulated.Conclusion:SLE serum can promote the senescence of bone marrow MSCs,which might be mediated by NF-κB signaling pathway.

Chemical constituents contained in Desmodium caudatum / 中国中药杂志

<p><b>OBJECTIVE</b>To study chemical constituents contained in Desmodium caudatum.</p><p><b>METHOD</b>The chemical compounds were separated by using such chromatographic methods as macroporous resin, Sephadex LH-20, ODS and normal phase silicagel column, and their structures were identified by spectroscopic data analysis.</p><p><b>RESULT</b>Fifteen compounds were separated and identified as stigmasterol (1), beta-sitosterol (2), citrusinol (3), hibiscone A (4), yukovanol (5), kenusanone I (6), neophellamuretin (7), desmodol (8), erythrotriol (9), hibiscone D (10), kaempferol (11), 8-prenylquercetin (12), leachianone G (13), 5,7,4'-trihydroxy-dihydroflavonol (14), and 4H-1-benzopyran-4-one, 2-(3,4-dihydroxyphenyl) -2, 3-dihydro-3,5,7-trihydroxy-8-( 3-methyl-2-butenyl) -, (2R-trans)-(9CI) (15).</p><p><b>CONCLUSION</b>All of the compounds were separated from D. caudatum for the first time except compound 8.</p>

Chemical constituents of bear bile / 中国中药杂志

<p><b>OBJECTIVE</b>To study the chemical constituents of bear bile.</p><p><b>METHOD</b>The compounds were isolated by repeated column HP20 macroporous adsorption resin, Sephadex LH-20, ODS and silica gel as packing materials. The structures were identified on the basis of extensive spectroscopic data analysis and by comparison of their spectral data reported.</p><p><b>RESULT</b>Nine compounds were identified as 4',7-dihydroxyisoflavone (1), 4',7-dihydroxy-6-methoxyisoflavone (2), 4',6,7-trihydroxyisoflavone (3), 4'-methoxy-7-hydroxyisoflavone (4), tauroursodeoxycholic acid (5), taurochenodeoxycholic acid (6), ursodeoxycholic acid (7), chenodeoxycholic acid (8), cholesterol (9).</p><p><b>CONCLUSION</b>Compounds 1-4 were separated from bear bile for the first time.</p>

Flavonoid constituents from herbs of Sarcopyramis bodinieri var. delicata / 中国中药杂志

Phytochemical studies of the the herb Sarcopyramis bodinieri var. delicate (Melastomataceae) have been carried out. The compounds were separated by repeated D101 macroporous adsorption resin column combined with Sephadex LH-20, ODS, and silica gel chromatgrophy. The structures were identified on the basis of extensive spectroscopic data analysis, and by comparison of their spectral data with those reported. Eight flavonoid compounds isolated from the ethyl acetate extract was identified as isorhamnetin (1), quercetin (2), isorhamnetin-3-O-beta-D-glucopyranoside (3), quercetin-3-O-beta-D-glucopyranoside (4), isorhamnetin-3-O-(6"-acetyl)-beta-D-glucopyranoside (5), isorhamnetin-3-O-(2"-acetyl)-beta-D-glucopyranoside (6), quercetin-3-O-(6"-acetyl)-beta-D-glucopyranoside (7), and quercetin- 3-O-(6"-O-E-p-coumaroyl)-beta-D-glucopyranoside (8). All of the compounds were separated from the genus of Sarcopyramis for the first time.

Mechanism study of protobioside on tumor cell proliferation / 中国中药杂志

<p><b>OBJECTIVE</b>To investigate the anti-proliferative effect of Protobioside on the HepG2 cells and its mechanism.</p><p><b>METHOD</b>The inhibitory effects of Protobioside on 3 kinds of human cancer cell line was measured by MTT assay. Apoptotic morphological changes was observed by Hoechst33528 staining technique. Cell cycle were analyzed using flow cytometry. The expression of cell cycle related protein and apoptosis related protein were determined using Western blotting.</p><p><b>RESULT</b>Protobioside shows strong cytotoxic power on HepG2 cells and IC50 were 20 micromol x L(-1). The nucleus became pyknosis at 36 hours. The cells in G2/M phase increase in a dose-dependent and time-dependent manner. And the protein level of CyclinB1 was down-regulated, that of Bax was up-regulated and that of Bcl-2 was down-regulated.</p><p><b>CONCLUSION</b>The growth inhibition of Protobioside on HepG2 cells is highly related to cell cycle arrest at G2/M phase which was well correlated with the down-regulation of expression of Cyclin B1, and the induction of apoptosis via up-regulating of Bax and down-regulating Bcl-2 expression.</p>

Induction of immune responses in mice by vaccination with Liposome-entrapped DNA complexes encoding Toxoplasma gondii SAG1 and ROP1 genes / 中华医学杂志(英文版)

<p><b>OBJECTIVE</b>To evaluate the immune responses induced by experimental DNA construct encoding Toxoplasma gondii (T. gondii) surface antigen1 (SAG1) and rhoptry protein 1 (ROP1) in mice as a hybrid gene.</p><p><b>METHODS</b>Truncated SAG1 and ROP1 DNA fragments were amplified using polymerase chain reaction (PCR) and inserted into pEGFP-N3 vector to construct recombinant plasmid pSAG1-ROP1. NIH3T3 mammalian cells were transiently transfected with the DNA construct. Female BALB/c mice were given three intramuscular injections of 10 micro g plasmid DNA entrapped in liposome. Four weeks after the final booster injection, blood samples were collected and subjected to enzyme-linked immuno sorbent assay (ELISA) to investigate humoral and cell-mediated immune responses. Reversal transcript-polymerase chain reaction (RT-PCR) was used to evaluate the transcription of inoculated DNA-liposome complex in the injected site. Dot-blot hybridization was employed in order to detect whether or not the injected DNA was incorporated into the genomic DNA of the immunized mice.</p><p><b>RESULTS</b>Green fluorescence was observed in pSAG1-ROP1-transfected cells. Western blot analysis showed antibody recognition of the expressed SAG1-ROP1 was between 58 kDa and 75 kDa. No expression was observed in blank control plasmid-transfected cells. The sera of immunized mice exhibited antibodies to T. gondii tachyzoites and primarily interferon-gamma and interlukin-2. RT-PCR showed that the duration of transcribed inoculated liposome entrapped DNA in the injected muscular tissue was at least ten days post the first injection. Dot-blot hybridization revealed that the presence of foreign DNA in the splenocytes and peripheral blood leukocytes was transient and that no foreign DNA had inserted into the genomic DNA of mice immunized with pSAG1-ROP1.</p><p><b>CONCLUSIONS</b>Immunization with a liposome-encapsulated DNA construct encoding the T. gondii SAG1 and ROP1 can induce humoral and cell-mediated immune responses.</p>

Protective effect of DNA-mediated immunization with a combination of SAG1 and IL-2 gene adjuvant against infection of Toxoplasma gondii in mice / 中华医学杂志(英文版)

<p><b>OBJECTIVE</b>To characterize the immune response induced by SAG1 encoding plasmid combined with IL-2 gene adjuvant in mice and to assess the protective effect of this vaccination against toxoplasmosis.</p><p><b>METHODS</b>Mice were co-injected intramuscularly with plasmid encoding Toxoplasma gondii SAG1 plus murine IL-2 expression vector at a dose of 100 microg. Booster immunizations were employed 2 more times at 3-week interval. As controls, mice were inoculated with PBS or empty plasmid pcDNA3. Humoral and cellular responses were assayed using ELISA for the determination of Ab, Ab isotype and IFN-gamma, as well as IL-4. To detect the integration and dissemination of DNA in the injected mice, PCR and in situ hybridization were performed. All mice were then infected with highly virulent RH tachyzoites of Toxoplasma gondii intraperitoneally.</p><p><b>RESULTS</b>Significant increases in specific IgG levels were observed in mice after immunization three times with SAG1 expression plasmid. With respect to the IgG isotype, co-inoculation of IL-2 expression plasmid enhanced the level of IgG2a and the production of IFN-gamma. Challenging mice by vaccinating with combined plasmids with RH tachyzoites resulted in prolonged survival.</p><p><b>CONCLUSION</b>Humoral and cytokine responses elicited by SAG1 DNA immunization can be modulated by co-inoculation with IL-2 expression plasmid. The use of DNA vaccine in combination with an appropriate cytokine gene to prevent T. gondii infection warrants further investigation.</p>

Effect of sodium ferulate on heat shock protein 27 phosphorylation in vascular smooth muscle cells / 中国病理生理杂志

AIM: To investigate the effect of sodium ferulate on phosphorylation of heat shock protein 27(HSP27) in vascular smooth muscle cells(VSMCs) induced by angiotensin Ⅱ(AngⅡ) and platelet derived growth factor-BB(PDGF-BB).METHODS: Cultured VSMCs derived from rat thoracic aorta were used.The activity of HSP27 was evaluated by Western blotting with specific phospho-HSP27 antibody.RESULTS: The phosphorylation of HSP27 in response to AngⅡ and PDGF-BB was suppressed by sodium ferulate in a dose-dependent manner,with maximal inhibition rates of 39.0%(P

IMMUNE RESPONSES OF MICE VACCINATED WITH RECOMBINANTS CODED DIFFERENT STAGE GENES FROM FCC 1/HN STRAIN OF PLASMODIUM FALCIPARUM / 中国人兽共患病学报

Aim To search the effective malaria mixed gene vaccine and to explore the immune response of vaccinated host. The recombinant pcDNA3-EBA175/HRP Ⅱ was injected alone or mixed with pcDNA3-Pfs25 of Plasmodium falciparum into mice by intramuscular route. The muscle of injected parts were treated previously, e.g. injecting 50μl of 0. 5％bupivacaine into the muscle of left latter leg, with 2mm depth. To observed the changes of IgG antibody value, the splenic lymphocyte proliferation, the ratio of CD4+/CD8+ subgroups and NK cell killing activity. After injecting recombinant pcDNA3-EBA175/HRP Ⅱ alone or mixed with pcDNA3-Pfs25 into mice by intramuscular route, it showed that sera IgG value increased, the splenic T lymphocyte proliferation stimulated by specific antigen of Plasmodium falciparum increased, the ratio of CD4+/CD8+ decreased and NK cell activity increased. Enhanced immune injection could improve host's immune reaction.It is suggested intramuscular injection is an effective immune route, and mice inoculated with coding two gene recombinant alone or that mixed with sexual stage gene recombinant could all induce increased humoral and cellular immune response, and NK cell activity.

SEQUENCING AND HOMOLOGOUS ANALYSIS OF THE SEXUAL STAGE PFS25 GENE FROM PLASMODIUM FAL CIPARUM PFD-3/YN ISOLATE / 中国人兽共患病学报

Malaria vaccines are being developed against different stages in the parasite's life cycle. Although not directly protective ,the sexual stage vaccines would induce antibodies that would prevent infection of mosquitoes when ingestedin a bloodmeal containing sexual stage parasites. pfs25 has been tested to be an important candidate antigen for malarial transmission blocking vaccine . In this report we analyzed the complete code of pfs25 gene of Plasmodium falciparum PFD-3/YN isolate. The result shows that the gene encoding pfs25 of PED-3/YN isolate has a mutant which generates a PstI endonuclease restriction site and shares 99.2％ nucleotide homology with that of NF4 isolate.

Genetic Toxicity of Magnesium Sulfate to Root Tip Cells of Vicia faba / 环境与健康杂志

Objective To study the genetic toxicity of magnesium sulfate to the root tip cells of Vicia faba. Methods The root tip cells of Vicia faba with 1.5-2 cm root tip were taken as the subjects and were exposed to magnesium sulfate of different concentrations(0.50%-2.00%) for 6 h. In the other test,the cells were treated with 1.5% magnesium sulfate for 2,4,6,8 and 10 hours respectively. The distilled water and potassium dichromate (0.05%) were used as the negative and positive control respectively. The micronucleus and the chromosomal aberration were calculated after 24 hours of culture. Results Compared with the negative control group,0.1%,0.15%,0.175% and 0.2% of magnesium sulfate increased the micronucleus and 0.05%,0.1%,0.15%,0.175%,0.2% of magnesium sulfate increased the chromosomal aberration in Vicia faba root tip cells. Compared with the control group (0 h),both of the micronucleus and the chromosomal aberration of Vicia faba root tip cells increased (P