Humans ; Polyomavirus ; classification ; Polyomavirus Infections ; virology

Objective To investigate the expression and activity of transforming growth factor-β1 (TGF-β1)and endothelial nitric oxide synthase(eNOS) in the cavernous vascular structural remodeling of diabetic rats.Methods 52 adult male SD rats were randomly assigned to experimental group(DM) and control group(NDM).In DM group,diabetes was induced in rats 4 days after intraperitoneal injection with streptozotocin.HbA1c was measured on 2,4,8,and 16 weeks after injection.Penile tissues were harvested.The protein expression of TGFβ1 and eNOS in situ was evaluated by the Envision immunohistochemistry.Results Compared to NDM group,the expression of the HbA1c increased significantly in DM group on the 16th week(P ＜0.01),both the penile erection rate and penile erectile times decreased significantly in DM group on the 16th week (P ＜ 0.01),and the value of eNOS decreased on the 16th week(P ＜0.01).The expression of TGF-β1 went up in DM group compared to NDM group on the 8th week (P ＜ 0.01) and sustained to the 16th week (P ＞ 0.05).In DM group,we found that TGF-β1 protein in cavernous body of penis was positively related with age in weeks(r =0.947,P ＜0.01) ; and eNOS in cavernous body of penis was negatively related with age in weeks (r =-0.945,P ＜ 0.01).Meanwhile,the expression of TGF-β was negatively related with the eNOS(r =-0.891,P ＜0.01).Conclusion Our results indicate that TGF-β1 plays an important role in the pathogenesis of diabetic erectile dysfunction(ED) and TGF-β1 inhibition may be a promising strategy to prevent development of diabetic ED.

Objective:To analyze and compare the volatile components in vinegar-processed schisandrae sphenantherae fructus and vinegar-processed schisandrae chinesis fructus.Methods:The volatile components in vinegar-processed schisandrae sphenantherae fruc-tus and vinegar-processed schisandrae chinesis fructus were extracted by headspace solid phase-microextraction (HS-SPME) and quali-tatively analyzed by GC-MS.Results:Totally 20 kinds of constituents were identified from vinegar-processed schisandra sphenanthera fructus, which accounted for 99.55%of the total volatile components , and totally 21 kinds of constituents were identified from vinegar-processed schisandra sphenanthera fructus, which accounted for 99.90% of the total volatile components .Conclusion: The type and content of volatile components in vinegar-processed schisandrae sphenantherae fructus and vinegar-processed schisandrae chinesis fructus are quite different , and the study can provide scientific basis for the two traditional Chinese medicinal materials .

Objective:To investigate the clinical manifestation and determine the distribution of pathogens and their characteristics of drug susceptibility to bloodstream infections (BSIs), and provide evidence for clinical anti-infection treatments after renal transplantation.
Methods:Totally 81 episodes of BSIs occurred in 71 patients between July 2003 and June 2013. We retrospectively analyzed the pathogens and their drug susceptibility characteristics with BD microbiological assay system. We also collected the clinical and laboratory data of the patients . Results:The main pathogens were gram negative bacteria (67.90%), followed by gram positive bacteria (28.40%) and fungi (3.70%). The most common gram negative bacillus was Escherichia coli.While for gram positive bacteria, the main bacillus was coagulase-negative staphylococci. The gram negative bacteria were relatively sensitive to aminoglycosides and carbapenem. The gram positive bacteria were sensitive to glycopeptides and oxazolidone.
Conclusion:The clinical manifestations included high body temperature, onset in the early period after kidney transplantation and high mortality. Though gram positive coccus plays an important role, most infections are caused by gram negative bacteria in BSIs after the renal transplantation. The antibiotic resistant rate for gram negative bacteria is very high as well as gram positive bacteria.

Objective To study the effect of extended nursing on puerperal melancholia incidence.Methods Two hundred perpetrates received interventions of extended nursing after delivery,including education about puerperal state,turning on hot line and creation of QQ group,follow-ups and supporting from family members.Result The incidence rate of puerperal melancholia since performance of extended nursing was significantly lower than what is after its performance(P<0.01).Conclusions The extended nursing can help perpetrates to receive nursing knowledge,alleviate their anxiety,strengthen the confidence to take care of baby.As the result,it can reduce the incidence of puerperal melancholia.

AIM: To research the application analysis of trabeculectomy combined with phacoemulsification treating patients with primary angle-closed glaucoma ( PACG) and cataract.
METHODS: Seventy-three patients from September, 2011 to September, 2013, with primary angle- closed glaucoma and cataract, were selected in our research. Patients were all treated with trabeculectomy combined with ultrasonic emulsification, and the therapeutic effect was observed.
RESULTS: The effects of trabeculectomy combined with phacoemulsification treating primary angle-closed glaucoma and cataract in reducing intraocular pressure were better, and postoperative visual acuity results of the research objects were satisfactory. And it could deepen the central anterior chamber depth effectively. All the research objects had few complications.
CONCLUSION: Trabeculectomy combined with phacoemulsification treating primary angle - closed glaucoma and cataract can achieve a good result for reducing intraocular pressure, postoperative visual acuity recovery and correction, and the surgical success rate is high, with low complication rates. It is worthy of widely clinical application.

ObjectiveTo explore the relationship of circadian distribution of acute myocardial infarction with AMI location and ST segment changes in elderly patients.MethodsThe time of infarction, its anatomic location, changes of ST segment, and coronary angiography were studied in 909 elderly patients with acute myocardial infarction (AMI) ( 412 with anterior AMI and 423 with inferior AMI) admitted to our coronary care units from January 1996 to January 2006.ResultsThe onset of inferior myocardial infarction were more frequent between midnight and 6AM than other periods of the day (n=138/423,32.6% of all inferior myocardial infarction patients, P<0.01). The onset of anterior myocardial infarction were more frequent between 6AM and noon than other periods of the day (n=156/412, 37.9% of all anterior myocardial infarction patients, P<0.01). Coronary angiography was performed in 789 patients (86.8%, 516/909).118 cases of them with inferior infarction occured between midnight and 6AM, including 85.6% of them were due to right coronary artery occlusion and 14.0%(17/118) of them were due to left coronary artery occlusion (P<0.01).275 cases of them with inferior infarction oecured between 6AM and midnight, including 52.2% (149/275) of them were due to right coronary artery occlusion and 45.8% of them were due to left coronary artery occlusion (P>0. 05). The onset of inferior myocardial infarction between 6AM and noon was the most frenquent in patients with ST segment elevation (44.0%, 263/644), while the onset of inferior myocardial infarction between midnight and 6 AM was the most frenquent in patients with non-ST segment elevation (36.6%,96/265). ConclusionsThe frequency of AMI at night is higher in elderly patients with ST segment elevation than in elderly patients with non-ST segment elevation.AMI at night is usually due to right coronary artery occlusion, which suggests that a protective role of sleep may be limited to left coronary artery -related events and AMI of non-ST segment.

OBJECTIVETo analyse the relationship between the electrical activity changes of nucleus accumbens (NAc) shell and the drug-seeking behavior by recording NAc shell electrical activity in conditioned place preference (CPP) rats induced by morphine.

METHODSForty SD rats were randomly divided into operation-only control group and the morphine-induced CPP group after stereotaxic electrode was buried on rats NAc shell and the latter group was used to establish the morphine CPP model(n = 20). A CPP video system combining with the technique of electrical activity wireless telemetry was used in the study. The NAc electrical activity from each group of rats was recorded by wireless telemetry respectively, which included staying in black or white chamber of video box, shuttling between black-white chambers and between white-black chambers. The electrical activity differences were analyzed by the percentage of each wave.

RESULTSWhen the morphine-induced rats staying in black chamber, compared with the operation-only control group, the NAc shell electrical activity showed that the percentage of 0 - 10 Hz was increased(P < 0.05), meanwhile, those of 10 - 20 Hz and 30 - 40 Hz were reduced(P < 0.05, P < 0.01); when the morphine-induced rats staying in white chamber, the NAc shell electrical activity showed that the percentage of 0 - 10 Hz and 30 - 40 Hz were increased(P < 0.05 , P < 0.01) , that of 10 - 20 Hz was reduced(P < 0.05 , P < 0. 01); when the morphine-induced rats in black- white shuttling status, the NAc shell electrical activity showed that the percentage of 0 - 10 Hz was increased(P <0.05, P <0.01), that of 10- 30 Hz was reduced( P <0.05); and in the white-black shuttling status, the electrical activity showed that the percentage of 0 - 10 Hz was reduced(P <0.05), that of 10 - 30 Hz was increased(P < 0.05) ; the electrical activity was further compared between staying status and shuttling status in the morphine-induced CPP group. There was no significant difference of electrical activity between the rats in white-black shuttling status and staying in white chamber. However, when rats in black-white shuttling status, compared with staying in black chamber, the electrical activity showed that the percentage of 0 - 10 Hz and 40 - 50 Hz were increased(P < 0.05), meanwhile, those of 10 - 20 Hz and 30 - 40 Hz were reduced(P <0.05).

CONCLUSIONThe electrical activity changes of NAc shell in morphine-induced CPP rats were different from those of the operation-only control group, and these changes might be associated to the rat's drug-seeking behavior.

Animals ; Conditioning (Psychology) ; Drug-Seeking Behavior ; Morphine ; pharmacology ; Nucleus Accumbens ; drug effects ; physiology ; Rats ; Rats, Sprague-Dawley ; Telemetry

OBJECTIVETo study the correlation between EEG characteristics of medial prefrontal cortex (mPFC) and drug-seeking behavior of rats with morphine dependent place preference under shuttling condition.

METHODSForty rats were randomly divided into four groups (n = 10): morphine PL group, NS PL group, morphine IL group and NS IL group. After embeding the electrode in prelimbic (PL) or infralimbic (IL) cortex of each group by brain stereotaxic operation, the model of morphine dependent conditioned place preference (CPP) in rats was established. The differences of EEG wave percentage in mPFC were telemetered and analyzed when rats shuttled before and after the model.

RESULTSAfter the model, the withdrawal symptoms were evident in morphine PL and IL group, and the activity time and distance in white box were increased obviously. Compared with control group, after the model, the EEG in morphine PL group showed that: when the rats shuttled to white box, 8 wave decreased obviously, P wave increased obviously. When the rats shuttled to black box, brain waves showed opposite changes. The EEG in morphine IL group showed that: when the rats shuttled to white box, a wave increased obviously, P and a wave decreased obviously. When the rats shuttled to black box, the brain wave had no significant differences compared with control group.

CONCLUSIONThe EEG changes are different in PL and IL cortex of morphine CPP rats under shuttling condition, and the EEG changes are also different when rats shuttling to white or black box. There is possibly different mechanism, when different drug-seeking environmental cues caused EEG changes in different regions of mPFC.

Animals ; Conditioning (Psychology) ; Cues ; Drug-Seeking Behavior ; Electroencephalography ; Morphine Dependence ; physiopathology ; Prefrontal Cortex ; physiopathology ; Rats ; Telemetry

Innovative Experiment Competition of Preventive Medicine is a significant constitution of Guangdong Undergraduate Technique Competition of Preventive Medicine. Without the constriction of majors, students participate in group with 3 people, design their own experiments around the hot spots and practical problems in public health area and are awarded according to the grades of the experiment design and thesis defence. The most topics in the first and the second competitions are about environmental hygiene and occupational hygiene, and the infectious diseases are attracting increasing attention. More and more topics combine the method of experiment with investigation. Some tactics are also suggested that innovation, view of general population, autonomy and investigation should be included in topic selection for this contest.