Objective To investigate the association of the Glu298-Asp(894G→T)mutation at exon 7 of the endothelial nitric oxide synthase gene and acute myocardial infarction.Methods By using the designed primers based on flanking sequences of the Glu298-Asp mutation at exon7 of eNOS, 894G→T fragments were amplified by nested PCR from genomic DNA of healthy control and AMI subjects, digested by restriction enzyme after amplification and detected by agarose gel electrophoresis for 894G→T genotyping. To count the genotype and allele frequencies, the significance of difference in the genotype and allele between two groups were assessed by statistical analysis.Results Three genotypes containing GG, GT, TT were identified on the 894 site of the eNOS gene exon 7 in both AMI and controls. In AMI group, there were 25 patients having 9 homozygotes, the other 16 having heterozygotes. In controls, there were 13 cases with G894T mutation,all having heterozygotes. The mutation frequency of TT homozygote allele has extraordinary significant difference between two groups (P

The authors tried to combine the theoretical learning with experimental and clinical teaching by adding teaching materials of public opinion,head-simulator,typical cases,clinical practice,examination of clinical operation skill,and make up with deficiency to some extend in current pattern of stomatology teaching. The results have showed that the pattern of experimental teaching not only raises the students'activity,consolidates their basic knowledge,develops their clinical thinking ability,but also increases their ability of clinical operational skill before clinical training.

OBJECTIVETo improve the method for monitoring sleep state and respiratory rhythm of SD rats, providing a solution for rats' chewing on the wires, signal loss and instability problems in the animal model of sleep apnea syndrome (SAS).

METHODSWe improved monitoring electrodes of both electrocorticogram (ECoG) and electromyogram (EMG), signal circuit and animal operation.

RESULTSOperation time was shortened and wound exposure time was reduced, which made it easier for postoperative recovery. The ECoG and EMG signals were more stable with sharp image, and signal circuit lines had better conductivity and material durability, achieving continuous monitoring for a long time and high success rate. We could precisely distinguish the sleep wake state and the sleep apnea events in rats according to these signals.

CONCLUSIONThe improved method is more reliable and practical to test the small animal model of SAS, and is more easily to operate and the signals are more stable.

Animals ; Electroencephalography ; methods ; Electromyography ; methods ; Models, Animal ; Monitoring, Physiologic ; methods ; Rats ; Respiration ; Sleep ; Sleep Apnea Syndromes ; diagnosis

Objective To investigate the relationship of plasma homocysteine with the genotype distribution of MTHFR and MTRR among Chinese Han women in Xiangtan. Methods MTHFR C677T, A1298C and MTRR A66G geno?typing was analyzed to detect the distribution of gene polymorphisms among 1 701 women from Xiangtan city then the data were compared with the rest of the Han women in Zibo, Zhengzhou, Yantai, Zhenjiang, Songzi, Huizhou, Qionghai. Plasma Hcy levels from 110 patients were measured and analyzed the correlation with gene polymorphisms. Results The frequency of MTHFR C677T genotype and allele frequencies in Xiangtan is 12.6%which is higher than Huizhou (10.9%) and Qionghai (6.1%) but lower than Zibo (43.6%), Zhengzhou (36.8%), Yantai (32.2%), Zhenjiang (21.8%) with statistically significant dif?ference (P<0.05). There is no significant different in MTHFR C677T between Xiangtan and Songzi. The frequency of MTH?FR A1298C genotype and allele frequencies in Xiangtan is 4.8%which is lower than Qionghai(7.1%)but higher than Zibo (1.4%),Zhengzhou(2.4%), Yantai(1.8%), Zhenjiang(3.5%)and Songzi(2.6%)with statistically significant difference. The frenquency of MTRR A66G genotype and allele frequencies in Xiangtan is 6.8%which is higher than Zibo (4.8%) but lower than Qionghai (9.3%) with statistically signifcant difference. Plasma Hcy concentration correlate with MTHFR C677T, Hcy concentration in TT population is higher than that in CT and CC population(μmol/L:8.52±2.01 vs 5.94±1.47 vs 5.71± 0.18);Plasma Hcy concentration also correlate with MTHFR A1298C and Hcy concentration in CC population is higher than AA and AC population(μmol/L:9.83 ± 2.26 vs 6.35 ± 2.13 vs 5.55 ± 1.75);Plasma Hcy concentration does not correlate with MTRR A66G. Conclusion The gene polymorphism of MTHFR C677T, A1298C and MTRR A66G among the Han women in Xiangtan was statistically different from other selected regions of China. Mutation in MTHFR C 677T and A1298C were associated with elevated plasma levels of Hcy.

Objective:To investigate the value of atropine administration before tracheal intubation under general anesthesia in the elderly patients undergoing endobronchial ultrasound-guided transbronchial needle aspiration(EBUS-TBNA)biopsy.Methods:This was a case-control study.A total of 87 elderly hospitalized patients receiving chest enhanced CT test suggesting the risk of lung cancer with enlargement of mediastinal lymph nodes in 7 regions were scheduled to undergo endobronchial ultrasound-guided transbronchial needle aspiration(EBUS-TBNA)biopsy under general anesthesia.The patients were randomly divided into two groups by flipping a coin: the atropine group(n=40)and the control group(n=47). The indicators for evaluating the application values of atropine included preoperative, intra-operative and postoperative systolic blood pressure(SBP), diastolic blood pressure(DBP), heart rate, oropharyngeal and airway secretion volume, oxygen saturation, operation time, positive diagnosis rate and postoperative adverse reactions.Results:SBP and DBP were lower in the atropine group than in the control group before endotracheal intubation(131.7±15.3 mmHg vs.140.7±13.7 mmHg, 79.1±7.6 mmHg vs.85.6±7.4 mmHg, t=2.885 and 4.061, P<0.05). There was no significant difference in SBP and DBP 10 min after endoscopic operation and 10 min after tracheal extubation between the atropine group versus the control group(SBP: 109.1±11.2 mmHg vs.105.0±12.2 mmHg, 136.9±23.0 mmHg vs.129.9±11.2 mmHg, DBP: 66.9±7.5 mmHg vs.68.0±8.3 mmHg, 77.6±10.9 mmHg vs.78.5±6.4 mmHg, t=-1.617, 0.687, -1.751 and 0.448, P>0.05). There was no significant difference in HR between the two groups before endotracheal intubation( t=1.416, P>0.05), while HR was higher in the atropine group than in the control group 10 min after endoscopic operation and 10 min after tracheal extubation( t=-3.323 and -2.181, P<0.01 and P<0.05). The change rates of SBP and DBP were lower in the atropine group than in the control group 10 min after endoscopic operation and 10 min after tracheal extubation( t=7.947, -6.962, -3.187 and -3.232, P<0.01). The change rate of HR was lower in the atropine group 10 min after endoscopic operation and was higher 10 min after tracheal extubation than in the control group( t=-6.467 and -4.131, P<0.01). There were significant differences in the volume of oropharyngeal and airway secretions and fingertip oxygen saturation between the two groups before endotracheal intubation and 10 min after tracheal extubation( t=-2.334, 2.759, -3.314 and -2.767, P<0.01). The endoscopic operation time was less in the atropine group than in the control group with no statistically significant difference[(25.9±5.7)min vs.(26.4±4.7)min, t=0.391, P>0.05]. There was no significant difference in postoperative adverse reactions between the atropine group versus the control group(34 patients or 85.0% vs.43 patients or 91.5%, χ2=1.247, P>0.05). Conclusions:The application of atropine before tracheal intubation under general anesthesia is beneficial to stabilizing the intraoperative blood pressure and heart rate, and can reduce the production of postoperative oropharyngeal and airway secretions in elderly patients undergoing endobronchial ultrasound-guided transbronchial needle aspiration biopsy.

Objectives:To investigate the efficacy and toxicity of the full coverage radiation to primary and all metastatic lesions in patients with oligometastatic castration-resistant prostate cancer (CRPC).Methods:Forty-four patients with oligometastatic CRPC was retrospective analyzed from Oct. 2011 to Jun. 2017 at Peking University 1 st Hospital. Before radiotherapy, average age was 72(57-86), the median value of initial PSA was 38.545 (6.640-1 066.000)ng/ml, the median value of PSA nadir after initial androgen deprivation therapy(ADT) was 0.259(0.011-18.762)ng/ml, the time interval between initial ADT to diagnosis of metastatic castration resistant prostate cancer(mCRPC) was 12(4-96) months, and the median PSA value pre-radiotherapy was 3.765(2.040-187.000) ng/ml. There were 23(52.3%)patients with Gleason score 9-10 and 15(34.0%) patients with Gleason score 8. At the time of initial diagnosis, there was 41(93.2%) cases with stage T 3-T 4, 23(52.3%)cases with lymph node metastasis, and 29 (63.9%) case with distant metastasis. The number of metastatic foci before radiotherapy was 1 in 22(50.0%)cases, 2 in 12(27.3%)cases, 3 in 6(13.6%)cases and 4 in 4(9.1%)cases. There were 3 cases of pelvic lymph node metastasis (6.8%), 9 cases of retroperitoneal lymph node metastasis(20.5%), 21 cases of bone metastasis(47.7%), 11 cases of bone metastasis+ lymph node metastasis(25.0%), and no visceral metastasis. Image-guided volumetric modulated arc therapy(IGRT-VMAT) was used to fully cover primary and metastatic foci. The prostate and seminal vesicle were routinely underwent 76Gy/38 fractions, and the bioequivalent dose(BED 3) was 126.67 Gy. For those with pelvic lymph node metastasis, the drainage area of pelvic lymph node was 46Gy/23 fractions. According to the tolerance of different normal tissues around the lesions, the median BED 3 of local radiotherapy dose in the metastatic foci was 112.26(91.14-140.77)Gy. The efficacy and side effects of all these patients were recorded. Kaplan-meier method was used to analyze the overall survival and the new metastasis-free survival. Results:Only 1 patient had grade 3 urinary tract obstruction and underwent indwelling catheter. All the other patients had grade 1-2 toxic and side effects. After a median follow-up of 34.5(9-96) months, the PSA-nadir after radiotherapy was 0.088(0.003-132.000)ng/ml. Forty(90.9%) patients showed a decrease in PSA after radiotherapy, and 34(77.3%) cases. showed a decrease of >80%. The 1, 3, and 5-year overall survival rates were 90.9%, 54.5%, 36.8%, the 1, 3, and 5-year new metastasis free survival rates were 47.7%, 25.0%, 12.9%, respectively.Conclusion:The full coverage radiotherapy to primary and metastatic lesions showed high PSA response rate, the satisfactory survival and tolerable toxicity in oligometastatic CRPC patients.

Different-length fragments of the HIV trans-membrane antigen (gp120) gene were expressed in Escherichia coli, using T7 expression system. SDS-PAGE stained by Coomassic Brilliant Blue showed no expression of full-length gp120 and poor expression of half-length gp120 fragments from the N-terminal, but high expression of 1/3-lgenth gp120 gene fragments from the N-terminal (including V1/V2 epitopes), more than 18% of total bacterial protein. Western blot showed fairly good reactivity to serum from HIV-infected individual. On this basis, we expressed the corresponding tp 120 fragments of the HIV strains epidemic in China. This study laid a solid foundation for exploration of high expression of gp 120 in E.coli and development of HIV serological diagnostic system for Chinese people.

Objective To review the surgical methods and mid-term results of mitral valve repair in pediatric patients with moderate to severe mitral regurgitation (MR).Methods 132 children with moderate to severe MR,aged (18.9 ± 7.2)months,weighted(11.3 ±4.8) kg.The etiology for mitral regurgitation is congenital heart disease in 126 cases,infective endocarditis in 5 cases and Marfan syndrome in 1 case.Mitral valvuloplasty(MVP) was performed with cardiopulmonary bypass under moderate systemic hypothermia.The methods of MVP included annuloplasty,annuloplasty ring,cleft closure,reconstruction of posterior leaflet.The coucomitant cardiac anomalies were treated at the same time.The results of repair were evaluated by saline injection test and transesophageal echocardiography (TEE) during operation.Results Intra-operative TEE results: 131 cases had none to mild MR,and only one case had moderate MR.The patient underwent second repair immediately,subsequent TEE was mild.Mean cardiopulmonary bypass (CPB) time was (80.0 ± 31.1) minutes.Mean aortic clump time was (48.0 ± 17.9) minutes.The in-hospital mortality was 2.3％ (3 cases died).One died of heart failure on postoperative day 7,the other died of low cardiac output syndrome resulting on postoperative day 2.Another one was large ventricular septal defect(VSD) with pulmonary hypertension (PH),died of pulmonary infection.Mean postoperative ventilation time was (34.4 ± 31.9) hours,and mean postoperative inhosptial time was (9.0 ± 5.4) days.The average follow-up period was (40.5 ± 8.3) months (2 to 74 months).122 cases were fully followed up.Echocardiography showed that moderate MR was in 7 patients,and 3 patients had severe MR.4 patients underwent re-do mitral valve repair or mitral valve replacement.There was no late death.The overall survival rate at 5 years was 97.7％ and the overall freedom from reoperation at 5 years was 92.0％.Conclusion Pediatric patients with moderate to severe MR need early surgical treatment,the early and mid-term results were satisfactory.Individualized treatment protocol based on specific pathology was the keypoint of surgical therapy.

Objective To analyze the survival and prognostic factors in the treatment of angiosarcoma. Methods A retrospective study was performed on clinical data of 30 patients pathologically diagnosed with angiosarcoma who were admitted to our hospital from 1988 to 2015 and had complete follow?up data. In those patients, 18 patients received comprehensive treatment, containing 9 patients treated with surgery plus radiotherapy, 4 patients with surgery plus chemoradiotherapy, and 5 with surgery plus chemotherapy;12 patients received non?comprehensive treatment, containing 11 patients treated with surgery alone and 1 patient radiotherapy alone. The survival rates were calculated using the Kaplan?Meier method and analyzed using the log?rank test. The Cox regression model was used for multivariate prognostic analyses. Results The 1?, 2?, and 5?year sample sizes were 29,26, and 18, respectively. The 1?, 2?, and 5?year overall survival ( OS) rates were 70?1%, 49?1%, and 40?9%, respectively;the 1?, 2?, and 5?year local relapse?free survival rates were 52?8%, 44?0%, and 35?2%, respectively;the 1?, 2?, and 5?year distant metastasis?free survival rates were 81?6%, 68?0%, and 56?7%, respectively. The multivariate analysis showed that tumor site, tumor size, staging, and visible tumor residue after initial treatment were prognostic factors for OS ( P= 0?027, 0?027, 0?011, 0?000 );In the patients with stage Ⅰ or Ⅱ disease, the comprehensive treatment achieved a significantly lower local?relapse rate than the individual treatment ( P=0?006);gender, age, staging, and tumor site were prognostic factors for distant metastasis ( P=0?028, 0?011, 0?015, 0?022 ) . Conclusions Early diagnosis and early treatment are recommended for angiosarcoma, which has high local recurrence and distant metastasis rates. Comprehensive treatment ( surgery plus radiotherapy and/or chemotherapy) is recommended for patients with stage Ⅰ or Ⅱ disease. Tumor site, tumor size, staging, and visible tumor residue after initial treatment are prognostic factors.

Objective To study the distribution of rs2234693 and rs9340799 of estrogen receptor (ER)gene and the relationship between them and lipid metabolism in the Ningxia Hui group,China.Methods We used cluster sampling method to select 5 3 3 cases of Ningxia Yinchuan communities of Hui. SNP genotyping was performed using the Sequenom MassARRAY platform.Results ① The frequencies of the distribution of each genotype of rs2234693 in Ningxia Hui population were the same as those in Chinese Han and Dai,Americans, Europeans,and Japanese (P>0.05).The distribution of each genotype of rs9340799,especially AA genotype,was different from that in Europeans (P<0 .0 5 ).② The body mass index in dyslipidemia group was significantly different from that in the control group (P<0.01).③ The risk of dyslipidemia in subjects with GG genotype of rs9340799 was 2.97 times higher than that in subjects with other genotypes (OR=2.97,P<2.97 ).After adjustment of gender,age,and body mass index (BMI),estrogen level was also 2.76 times higher (OR=2.76,P<0.05).(4)The frequency of C-G in rs2234693-rs9340799 haplotype was greater than that in the control group,but without any significant difference (P>0.05).Conclusion ER genes distribution in the Hui nationality of Ningxia is significantly different from that in other races;rs2234693 has no obvious relationship with the occurrence of dyslipidemia while GG genotype in SNP rs9340799 significantly increases the risk of lipid metabolism disorders.