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BACKGROUND: Little is known about how the residential distance to the coast is associated with incident myocardial infarction (MI) and which mechanisms may explain the association. We aim to explore this association using data from a prospective, population-based cohort with unprecedented sample size, and broad geographical coverage. METHODS: In this study, 377,340 participants from the UK Biobank were included. RESULTS: It was shown that 4,059 MI occurred during a median 8.0 years follow-up. Using group (<1 km) as reference, group (20-50 km) was associated with a lower risk of MI (hazard ratio, HR 0.79, 95% CI 0.64-0.98) and a U-shaped relation between distance to the coast and MI was shown with the low-risk interval between 32 and 64 km (p non-linear = 0.0012). Using participants of the intermediate region (32-64 km) as a reference, participants of the offshore region (<32 km) and inland region (>64 km) were both associated with a higher risk of incident MI (HR 1.12, 95% CI 1.04-1.21 and HR 1.09, 95% CI 1.01-1.18, respectively). HR for offshore region (<32 km) was larger in subgroup with low total physical activity (<24 h/week) (HR 1.24, 95% CI 1.09-1.42, p interaction = 0.043). HR for inland region (>64 km) was larger in subgroup in urban area (HR 1.12, 95% CI 1.03-1.22, p interaction = 0.065) and in subgroup of high nitrogen dioxide (NO2) air pollution (HR 1.29, 95% CI 1.11-1.50, p interaction = 0.021). CONCLUSION: We found a U-shaped association between residential distance to the coast and incident MI, and the association was modified by physical activity, population density, and air pollution.

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Objective To detect the expression of YB-1 and to research the relationship in the occurrence and development in the cervical squamous carcinoma(SCC) tissues.Methods Immunohistochemistry(IHC) envision was used to detect the expression of chronic cervicitis,CIN Ⅰ,CIN Ⅱ-Ⅲ and SCC.The relationship of YB-1 in the clinical pathological parameters of SCC were analyzed.Results YB-1 was mainly located in the nucleus in squamous cell,sometimes in the cytoplasm.The YB-1 protein did not expression in chronic cervicitis.In CIN Ⅰ,CIN Ⅱ-lⅢ and SCC,the positive expression had a gradual increasing trend.The expression of YB-1 was satistically significant in four groups (P＜0.05).The chronic cervicitis group,CIN Ⅰ groupCIN Ⅱ-Ⅲ group compared with the SCC group restivelly,the difference was statistically significant (P＜0.05).From spearman rank correlation analysis:the expression of YB-1 was positively correlated with the degree of cervical lesions (P＜ 0.05).In the cervical squamous carcinoma group,the expression of YB-1 was not associated with clinical pathological index of SCC patients(P＞0.05).Conclusion The change of the quantity of YB-1 protein is closely related to cervical squamous cell carcinoma.

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Objective To observe the clinical efficacy of filiform fire-needle therapy plus mild moxibustion in treating flat warts.Method Ninety patients with flat warts were randomized into group A, group B and group C, 30 cases in each group. Group A was intervened by filiform fire-needle therapy plus mild moxibustion, group B was intervened by filiform fire-needle therapy alone and group C by mild moxibustion alone. The three groups all received treatment 3 times a week, 2 weeks as a treatment course, for 2 courses in total. The clinical efficacies of the three groups were compared.Result In group A, 12 subjects were recovered, 13 showed improved, and 5 cases failed; in group B, 7 subjects were recovered, 12 showed improved, and 11 failed; in group C, 5 cases showed recovered, 10 were improved, and 15 failed. The total effective rates were respectively 83.3% in group A, 63.3% in group B, and 50.0% in group C, and the total effective rate in group A was significantly higher than that in group B and C (P<0.05). Conclusion Filiform fire-needle therapy plus mild moxibustion can significantly help the skin rashes subside in treating flat warts, and the therapeutic efficacy is obviously superior to that of either of the two methods used alone.

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Objective To investigate the effects of separate and direct bee sting punctures at acupoints on ESR and RF in rheumatoid arthritis. Method Seventy-two patients with rheumatoid arthritis were randomized to observation and control groups, 36 cases each. The observation group received separate bee sting puncture at acupoints and the control group, direct bee sting puncture at acupoints. In both groups, treatment was given once every other day, three times a week, one week as a course, for two courses. ESR and RF were measured in the two groups before treatment and at one and two weeks after. Result ESR and RF changed significantly in both groups after treatment compared with before (P<0.05). The effects of the two treatments on rheumatoid arthritis-related ESR and RF were equal and there was no statistically significant difference between the two groups (P>0.05). Conclusion Both separate and direct bee sting punctures at acupoints can reduce ESR and RF in rheumatoid arthritis. Separate bee sting puncture at acupoints is easy for the patients to accept.

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The percutaneous coronary intervention (PCI) procedure has become one of the pivotal options in the treatment of coronary artery disease (CAD). Although the PCI procedure has rapidly developed in China, some concerns including in-stent restenosis and dissatisfactory long-term prognosis remain unsolved. Large-scale randomized controlled clinical trials indicate that angiotensin-converting enzyme inhibitors (ACEIs) and angiotensin II receptor blockers (ARBs) can reduce all-cause mortality and recurrent cardiac events in patients with CAD. ACEIs/ARBs are recommended as a fundamental treatment in the secondary prevention of CAD and reduce in-stent restenosis after PCI. This review focuses on the role of ACEIs/ARBs in improving long-term prognosis and reducing in-stent restenosis.

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<p><b>OBJECTIVE</b>Genetic evolution of VP1 of enterovirus type 71 in Shenzhen were analyzed.</p><p><b>METHODS</b>All samples were tested by RT-PCR using EV71 specific primer. The VP1 of EV71 were amplified and sequenced. A phylogenetic tree was constructed by comparison of the sequences with subgenotype A, B and C using DNAStar, BioEdit and Mega 3.1 software.</p><p><b>RESULTS</b>Among 35 strains, the homogeneity of the VP1 nucleotide sequence was between 92.1%-100%. The homogeneity of the VP1 nucleotide sequence with subgenotype A and B was between 81.4% -91.1%. The VP1 nucleotide sequence of 35 strains of Shenzhen shared between 93% -97.4% identity with cluster C4. The prevalence strains of EV71 were cluster C4b from 1998 to 2004, and gradually moved to C4a since 2003. All of EV71 were C4b from 2006 to 2008. Also, the homogeneity of the VP1 nucleotide sequence with Anhui FY23 EV71 strain were 94.5% -94.7%, 95.7% -95.8%, 96.2%, 95.4% -97.5%, 96.3% -99.2% from 2003 to 2008. It shows that the homogeneity was increased year by year. There was a mutation (A --> C) at No. 66 nucleotide of VP1 of EV71 that two strains were isolated in 2003 and 8 strains in 2008, that caused amino acid mutation (Q --> H) at No. 22 of VP1.</p><p><b>CONCLUSION</b>EV71 C4b was gradually moved to C4a from 1998 to 2008. There was a missense mutation at No. 66 nucleotide of VP1.</p>

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<p><b>OBJECTIVE</b>To conduct an epidemiological and genotype analysis of sapovirus (SaV) associated with sporadic diarrhea in Shenzhen in the year 2009.</p><p><b>METHODS</b>A total of 852 fecal samples were collected from sporadic cases of diarrhea in Shenzhen in 2009 and detected by reverse-transcription polymerase chain reaction (RT-PCR) using the primers of SLV5317/5749. The PCR products were analyzed with 1.5% agarose gel electrophoresis and sequenced to construct the phylogenetic tree.</p><p><b>RESULTS</b>Sixteen samples were found positive for SaV, with a positivity rate of 1.88%. Sequence analysis identified 8 isolates as SaV GI genotype (including 3 SaV GI.1 and 5 SaV GI.2), 7 as SaV GIV genotype, and 1 as GII genotype.</p><p><b>CONCLUSIONS</b>SaV infection is present in Shenzhen with GI as the predominant genotype. This is the first report of SaV GIV strains in China, which differs from the strains of Anhui-A141 and Beijing-CHN99/BJ360, suggesting the genotypic variety of SaV infection in China.</p>

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<p><b>OBJECTIVE</b>To explore the effect of extracellular signal regulated kinase 1/2 (ERK1/2) on edaravone (EDA)-triggered protection against myocardial toxicity induced by isoprenaline (ISO) in H9c2 myocardial cells (H9c2 cells).</p><p><b>METHODS</b>H9c2 cells were exposed to ISO at different concentrations to establish a cardiac toxicity model induced by persistent excitation of β1 receptor. EDA was added before ISO as a pretreatment. PD-98059, an ERK1/2 inhibitor, was administered 1 h prior to EDA to inhibit the phosphorylation of ERK1/2. Cell viability was measured using cell counter kit (CCK-8). The expressions of p-ERK1/2 and t-ERK1/2 were tested by Western blotting. Mitochondrial membrane potential (MMP) was detected by Rhodamine123 (Rh123) staining and photofluorography.</p><p><b>RESULTS</b>Exposure of H9c2 cells to 80 µmol/L ISO for 24 h down-regulated ERK1/2 phosphorylation and repressed MMP. Pretreatment with 10-40 µmol/L EDA for 1 h inhibited ISO-induced myocardial toxicity and pretreatment of 40 µmol/L EDA partially rescued ERK1/2 phosphorylation and MMP level. PD-98059 abolished cardiac protection of EDA, leading to myocardial toxicity and MMP loss.</p><p><b>CONCLUSION</b>EDA can protect H9c2 cells against myocardial injury induced by ISO by suppressing ISO-triggered inhibition of ERK1/2 activation.</p>

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<p><b>OBJECTIVE</b>To investigate the protective effect of reactive oxygen species (ROS) scavenger, N-acetyl-L-cysteine (NAC), against H9c2 cardiomyocytes from injuries induced by chemical hypoxia.</p><p><b>METHODS</b>H9c2 cells were treated with cobalt chloride (CoCl2), a chemical hypoxia-mimetic agent, to establish the chemical hypoxia-induced cardiomyocyte injury model. NAC was added into the cell medium 60 min prior to CoCl2 exposure. The cell viability was evaluated using cell counter kit (CCK-8), and the intercellular ROS level was measured by 2', 7'- dichlorfluorescein-diacetate (DCFH-DA) staining and photofluorography. Mitochondrial membrane potential (MMP) of the cells was observed by Rhodamine123 (Rh123) staining and photofluorography, and the ratio of GSSG/ (GSSG+GSH) was calculated according to detection results of the GSSG kit.</p><p><b>RESULTS</b>Exposure of H9c2 cardiomyocytes to 600 micromol/L CoCl2 for 36 h resulted in significantly reduced cell viability. Pretreatment with NAC at the concentrations ranging from 500 to 2000 micromol/L 60 min before CoCl2 exposure dose-dependently inhibited CoCl2-induced H9c2 cell injuries, and obviously increased the cell viability. NAC at 2000 micromol/L obviously inhibited the oxidative stress induced by CoCl2, decreased the ratio of GSSG/(GSSG+GSH), increased ROS level, and antagonized CoCl2-induced inhibition on MMP.</p><p><b>CONCLUSION</b>NAC offers obvious protective effect on H9c2 cardiomyocytes against injuries induced by chemical hypoxia by decreasing in the ratio of GSSG/(GSSG+GSH) and ROS level and ameliorating MMP.</p>

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<p><b>BACKGROUND</b>Due to the quick rhythm of life and work pressure, more and more people suffer from sleep quality problems. In this study, we investigated the effect of electroacupuncture on sleep quality of chronic insomniacs and the safety of electroacupuncture therapy.</p><p><b>METHODS</b>Four courses of electroacupuncture treatment were applied to 47 patients. With pre-treatment and post-treatment self-control statistical method, Pittsburgh sleep quality index (PSQI) scores were used for evaluating sleep quality. Polysomnogram was used for detecting insomniacs' changes in sleep architecture. The safety of electroacupuncture was evaluated by monitoring the self-designed adverse events and side effects during treatment and post-treatment.</p><p><b>RESULTS</b>Electroacupuncture considerably improved insomniacs' sleep quality and social function during the daytime. Electroacupuncture had certain repairing effect on the disruption in sleep architecture. At the same time, electroacupuncture prolonged slow wave sleep (SWS) time and relatively rapid eye movement sleep (REM sleep) time. There was no hangover, addiction or decrements in vigilance during the daytime (incidence rate was 0). However, insomnia rebound rate was about 23% within one month.</p><p><b>CONCLUSIONS</b>These results suggest that electroacupuncture has beneficial effect on sleep quality improvement in the patients with chronic insomnia, which may be associated with repairing sleep architecture, reconstructing sleep continuity, as well as prolonging SWS time and REM sleep time. Electroacupuncture treatment for chronic insomnia is safe. Therefore, electroacupuncture therapy could be a promising avenue of treatment for chronic insomnia.</p>

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<p><b>OBJECTIVE</b>To develop an simple and sensitive method for detecting anti-coronavirus IgG antibodies in bat sera based on enzyme-linked immunosorbent assay (ELISA).</p><p><b>METHODS</b>A commercial ELISA kit for detecting SARS-CoV antibody was modified for detecting coronavirus antibodies in bat serum samples. The second antibody in the kit was replaced with horseradish peroxidase-conjugated protein-A (HRP-SPA) based on the characteristics of binding between Staphylococcus aureus protein A (SPA) and mammal IgG Fc fragment. The sera of 55 fulvous fruit bats (Rousettus dasymallus) were tested using the SPA-ELISA.</p><p><b>RESULTS</b>The test results of the positive and negative controls in the kit and the serum samples from convalescent ;patient were consistent with expectation. Coronavirus antibody was detected in 2 out of the 55 bat serum samples. Serum neutralization test confirmed the validity of the SPA-ELISA method.</p><p><b>CONCLUSION</b>This SPA-ELISA method is applicable for detecting coronavirus antibody in bat sera.</p>

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<p><b>OBJECTIVE</b>To investigate the effects of angiotensin (Ang)-(1-7) on oxidative stress and functional changes in isolated rat hearts with myocardial ischemia-reperfusion (IR) injury.</p><p><b>METHODS</b>IR injury was induced in isolated rat hearts with the Langendorff' apparatus. The left ventricular systolic pressure (LVSP) of the rat heart was measured using a pressure transducer. Malondialdehyde (MDA) level and superoxide dismutase (SOD) activity in the myocardium were detected using commercial kits.</p><p><b>RESULTS</b>Myocardial ischemia (15 min) and reperfusion (30 min) significantly increased myocardial levels of MDA, and reduced the SOD activity and LVSP (P<0.05). Pretreatment with Ang-(1-7) at 1.0 nmol/L 30 min before ischemia obviously inhibited IR-induced MDA increment and lowering of SOD activity and LVSP. Pretreatment of the rats with intraperitoneal injection of 5 mg/kg indomethacin 1 h before isolation of the heart markedly antagonized the effect of Ang-(1-7) on MDA production, SOD activity and LVSP.</p><p><b>CONCLUSION</b>Angiotensin-(1-7) can inhibit IR injury-induced oxidative stress and decrease in cardiac contractile function in isolated rat hearts. The mechanism underlying the effect of Ang-(1-7) may be associated with increased secretion of prostaglandin.</p>

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<p><b>BACKGROUND</b>Pulse wave velocity and flow-mediated vasodilation (FMD) are widely used as noninvasive modalities for evaluating atherosclerosis. However, it is not known whether pulse wave velocity is related to FMD in patients with coronary artery disease (CAD). Therefore, the present study was designed to investigate the alteration in brachial-ankle pulse wave velocity (baPWV) and endothelial function in CAD patients.</p><p><b>METHODS</b>Thirty-three patients with CAD and thirty control subjects were recruited for this study. baPWV was measured non-invasively using a VP 1000 automated PWV/ABI analyzer (PWV/ABI, Colin Co. Ltd., Komaki, Japan). Endothelial function as reflected by FMD in the brachial artery was assessed with a high-resolution ultrasound device.</p><p><b>RESULTS</b>baPWV was increased in CAD patients compared with control subjects [(1756.1 +/- 253.1) cm/s vs (1495.3 +/- 202.3) cm/s, P < 0.01]. FMD was significantly reduced in CAD patients compared with control subjects [(5.2 +/- 2.1)% vs (11.1 +/- 4.4)%, P < 0.01]. baPWV correlated with FMD (r = -0.68, P < 0.001). The endothelium-independent vasodilation induced by sublingual nitroglycerin in the brachial artery was similar in the CAD group compared with the control group.</p><p><b>CONCLUSIONS</b>CAD is associated with increased baPWV and endothelial dysfunction. Increased baPWV parallels diminished endothelial function. Our data therefore suggest that baPWV can be used as a noninvasive surrogate index in clinical evaluation of endothelial function.</p>

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<p><b>OBJECTIVE</b>To investigate the influence of ACE inhibitor (perindopril) on the contractility and calcium transient and calcium handling proteins in ventricular myocytes from rats with experimental heart failure.</p><p><b>METHODS</b>Male Wistar rats were randomized to heart failure group treated with perindopril (CHF-T, 3 mg.kg(-1).d(-1)), heart failure group without treatment (CHF-C) and sham-operated group (PS) after heart failure was induced by constricting abdominal aorta for 16 weeks. All groups were further followed up for 12 weeks. Left ventricular myocytes were isolated, and single cell shortening fraction and [Ca(2+)](i) were simultaneously measured through laser scanning confocal microscope under the field stimulation (1.0 Hz). RT-PCR and Western blot were performed to evaluate the level of mRNA and protein of Na(+)-Ca(2+) exchanger (NCX(1)), sarcoplasmic Ca(2+)-ATPase (SERCA(2)) and phospholamban (PLB).</p><p><b>RESULTS</b>The fraction of cell shortening (FS%) and [Ca(2+)](i max) (nmol/L) were significantly smaller in group CHF-C than group PS (FS%: 7.51 +/- 1.15 vs 13.21 +/- 1.49; [Ca(2+)](i max): 330.85 +/- 50.05 vs 498.16 +/- 14.07; both P < 0.01). And in CHF-T group, FS and [Ca(2+)](i max) were greater than those in CHF-C group. In CHF-C group, the left ventricular mRNA of NCX(1) and PLB were significantly higher than those in PS group (R(NCX)(1)/beta-Actin: 0.51 +/- 0.12 vs 0.19 +/- 0.06, P < 0.01; R(PLB)/beta-Actin: 0.26 +/- 0.12 vs 0.20 +/- 0.08, P = 0.045), yet SERCA(2) mRNA was lower than PS group (0.48 +/- 0.10 vs 0.80 +/- 0.11, P < 0.01). In CHF-T group, the mRNA levels of NCX(1) and SERCA(2) were just in the midst of the CHF-C and PS group, and had statistical significance respectively (all P < 0.05). In CHF - C and CHF - T group, the protein levels of NCX(1) were 1.141 +/- 0.047 and 1.074 +/- 0.081 times PS group, respectively (both P < 0.05), and SERCA(2) protein levels were respectively 0.803 +/- 0.100 and 0.893 +/- 0.084 times as high as in PS group (both P < 0.05). The protein expression of NCX(1) and SERCA(2) were also different between CHF-C and CHF-T groups (both P < 0.05).</p><p><b>CONCLUSION</b>ACE inhibitor could improve cardiac function in CHF through directly enhancing the contractility of single myocardial cell, and these effects were probably mediated by its role in preventing the deleterious changes of calcium transient and calcium handling proteins in CHF.</p>

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<p><b>BACKGROUND</b>Chronic heart failure (CHF) is associated with calcium transients and calcium handling proteins. Angiotensin converting enzyme (ACE) inhibitor has been demonstrated to have beneficial effect on CHF. Yet studies addressed to the relationship between ACE inhibitor and calcium transients in CHF are rare. The aim of this study was to investigate the influence of ACE inhibitor (perindopril) on the contractility and calcium transients and calcium handling proteins in ventricular myocytes from rats with experimental heart failure.</p><p><b>METHODS</b>Male Wistar rats were randomized to heart failure group treated with perindopril [CHF-T, 3 mg.kg(-1).d(-1)], heart failure group without treatment (CHF-C) and sham-operated group (PS). Heart failure was induced by abdominal aortic constriction. All groups were further followed up for 12 weeks. Left ventricular myocytes were then isolated. Single cell shortening fraction and [Ca(2+)]i were simultaneously measured by laser scanning confocal microscope under the field stimulation (1.0 Hz). Reverse transcriptase-polymerase chain reaction (RT-PCR) and Western blot were performed to evaluate the changes of mRNA and protein of Na(+)-Ca(2+) exchanger (NCX1), sarcoplasmic reticulum Ca(2+)-ATPase (SERCA2) and phospholamban (PLB).</p><p><b>RESULTS</b>The fraction of cell shortening (FS%) and [Ca(2+)]imax (nmol/L) were significantly reduced in group CHF-C compared with group PS (FS%: 7.51 +/- 1.15 vs 13.21 +/- 1.49; [Ca(2+)]i max: 330.85 +/- 50.05 vs 498.16 +/- 14.07; both P < 0.01), and restored at least partially in CHF-T group. In CHF-C group, the left ventricular mRNA of NCX1 and PLB were significantly upregulated in comparing with PS group (RNCX1/beta-Actin: 0.51 +/- 0.12 vs 0.19 +/- 0.06, P < 0.01; RPLB/beta-Actin: 0.26 +/- 0.12 vs 0.20 +/- 0.08, P < 0.05), while SERCA2 mRNA was downregulated (0.48 +/- 0.10 vs 0.80 +/- 0.11, P < 0.01). The mRNA levels of NCX1 and SERCA2 in CHF-T group were between the CHF-C and PS group, and the differences of the latter two groups were significant (all P < 0.05). In CHF-C and CHF-T groups, the protein expression of NCX1 were 1.141 +/- 0.047 and 1.074 +/- 0.081 times of that in PS group respectively (both P < 0.05), and SERCA2 protein levels were 0.803 +/- 0.100 and 0.893 +/- 0.084 times of that in PS group respectively (both P < 0.05). The protein expression of NCX1 and SERCA2 in the CHF-C and CHF-T groups is significantly different (both P < 0.05).</p><p><b>CONCLUSION</b>ACE inhibitor could improve cardiac function of failing heart through directly enhancing the contractility of single cardiomyocyte, and these effects are probably mediated by its roles in preventing the deleterious changes of calcium transients and calcium handling proteins in CHF.</p>

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