Antihypertensive Agents ; therapeutic use ; Blood Pressure Determination ; Humans ; Hypertension ; physiopathology ; therapy

Objective:To explore the relationship between the lipid accumulation product index (LAP) and the risk of carotid atherosclerosis in different gender groups.Methods:The data of 2 740 employees of Dalian municipal government and institutions, including 1 583 males and 1 157 females, who had underwent physical examination in Dalian Municipal Central Hospital Affiliated of Dalian Medical University from January to June 2018 were analyzed retrospectively. The general data, laboratory indexes and carotid ultrasound data of the population were collected, and the body mass index (BMI) and LAP value were calculated. According to carotid intima-media thickness (IMT), the subjects were divided into carotid atherosclerosis group (IMT ≥ 1.0 mm) and carotid normal group (IMT<1.0 mm). The clinical indicators between the two groups were compared. Independent risk factors for carotid atherosclerosis were analyzed by binary Logistic regression, and the cutoff point for predicting carotid atherosclerosis by LAP was calculated by receiver operating characteristic (ROC) curve.Results:The age, waist circumference (WC), hip circumference (HC), LAP, BMI, total cholesterol (TC), low density lipoprotein cholesterol (LDL-C), fasting plasma glucose (FPG), systemic blood pressure (SBP), diastolic blood pressure (DBP) and the prevalence of hypertension and diabetes in the male and female population carotid atherosclerosis groups were significantly higher than those in the normal group ( P<0.05). The results of binary Logistic regression analysis showed that after adjusting age, BMI, HC, WC, smoking, drinking, hypertension, diabetes, TC and LDL-C, the risk of carotid arteriosclerosis still increased 1.316 times with each quartile interval of LAP in women ( OR= 1.316, 95% CI 1.063 to 1.629, P = 0.012). In men, after adjusting for these factors, the independent effect of LAP on the risk of carotid atherosclerosis disappeared. In women, the area under curve (AUC) of LAP in predicting carotid atherosclerosis was 0.713, significantly higher than that of BMI (AUC 0.614) and WC (AUC 0.654), and the differences were statistically significant ( P<0.05). But there was no significant difference among the three indexes in the male population in predicting carotid atherosclerosis. According to ROC curve, the best cut-off value of LAP for predicting carotid atherosclerosis was 32.13 cm·mmol/L in men and 33.70 cm·mmol/L in women. Conclusions:LAP is an independent risk factor for carotid atherosclerosis in female population, and its predictive ability for carotid atherosclerosis is higher than that of body mass index and waist circumference. LAP ≥ 33.70 cm·mmol/L can be used as the best cut-off value for screening carotid atherosclerosis in female population.

Objective:To express SARS-CoV nucleocapsid protein in Bac-to-Bac Baculovirus Expression System and analyze the antigenicity of the recombinant protein.Methods: The SARS-CoV nucleocapsid gene was amplified by PCR.The PCR product digested with BamHⅠand SalⅠrestriction endonucleases was cloned into vector pFastBac HTC of Bac-to-Bac Baculovirus expression system.Recombinant plasmid was transformed DH 10Bac cells to obtain the recombinant Bacmid DNA.Recombinant Bacmid DNA was transferred into Sf9 cells which were inducted to express the recombinant protein in High Five cells.After purified by Ni affinity chroma-tography ,the antigenicity of the recombinant protein was analyzed by Western blot and ELISA.Results:Recombinant plasmid was con-structed successfully.The recombinant protein with the relative molecular mass of 48 kD was efficiently expressed in High Five cells and purified successfully by Ni affinity chromatography.Western blot and ELISA analysis showed that the recombinant protein could be spe -cifically recognized by the monoclonal antibody to SARS-CoV N protein and immune serum from rabbits ,respectively.The recombinant protein can specifically reacted with serum from SARS patients ,not with serum from healthy persons and patients infected with hCoV-229 E and hCoV-OC43.Conclusion: SARS-CoV nucleocapsid protein has been expressed successfully in the Bac-to-Bac Baculovirus Expression System ,and obtained good antigenicity.It is preliminary deemed that it can't reacted with serum from patients infected with hCoV-229E and hCoV-OC43.

10.3969/j.issn.2095-4344.2013.25.004

ObjectiveTo evaluate the effectiveness of transcatheter Amplatzer device closure on patent ductus arteriosus(PDA),and to give some evidences for the clinical application.MethodsAll studies in the world regard to the controlled trials(CT) about transcatheter Amplatzer device closure and cardiac surgery on PDA were searched and made synthetic evaluation by means of Meta-analysis.RevMan 4.2.2 software was used for statistical analysis.Cases relative risk(RR)and its 95% confidence interval(CI)of procedure failure,the incidence of complication and residual shunt were calculated.ResultsTotally 5 studies including 349 cases were analyzed.Operation failure of Amplatzer device occlusion was higher than cardiac surgery [5 CT,349 cases,3.0% vs 0,RR=4.29,95%CI(0.77,23.95)](P=0.10).Incidence of complication of Amplatzer device occlusion was lower than cardiac surgery[5 CT,343 cases,3.1% vs 38.0%,RR=0.11,95%CI(0.05,0.23)](P

Objective To explore whether dithiothreitol(DTT)is helpful for PreScission Protease to cut off the GST from GST?CT3 protein. Meth?ods The pGEX?6P?3/CT3 recombinant plasmid was transfected into Escherichia coli BL21,and the GST?CT3 fusion protein was purified by B?PER method. PreScission Protease was applied with 10 mmol/L DTT to cut off the GST,then the SDS?PAGE was performed for identification of the CT3 protein. Results Without DTT,it was very difficult for PreScission Protease to cut off the GST from GST?CT3 protein. However,in the pres?ence of 10 mmol/L DTT,PreScission Protease could cut off the GST easily as identified by SDS?PAGE. Conclusion 10 mmol/L DTT can help Pre?Scission Protease to cut GST from GST?CT3 protein,so as to achieve high concentration of CT3.

OBJECTIVE: To explore the application of mixed reality technique for the surgery of oral and maxillofacial tumors. METHODS: In this study, patients with a diagnosis of an oral and maxillofacial tumor who were referred to Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology from December 2018 to January 2020 were selected. The preoperative contrast-enhanced computed tomography data of the patients were imported into StarAtlas Holographic Medical Imaging System (Visual 3D Corp., Beijing, China). Three-dimensional (3D) model of tumor and key structures, such as skeleton and vessels were reconstructed to three-dimensionally present the spatial relationship between them, followed with the key structures delineation and preoperative virtual surgical planning. By using mixed reality technique, the real-time 3D model was displayed stereotactically in the surgical site. While keeping sterile during operation, the surgeon could use simple gestures to adjust the 3D model, and observed the location, range, and size of tumor and the key structures adjacent to the tumor. Mixed reality technique was used to assist the operation: 3D model registration was performed for guidance before tumor excision; intraoperative real-time verification was performed during tumor exposure and after excision of the tumor. The Likert scale was used to evaluate the application of mixed reality technique after the operation. RESULTS: Eight patients underwent mixed reality assisted tumor resection, and all of them successfully completed the operation. The average time of the 3D model registration was 12.0 minutes. In all the cases, the surgeon could intuitively and three-dimensionally observe the 3D model of the tumor and the surrounding anatomical structures, and could adjust the model during the operation. The results of the Likert scale showed that mixed reality technique got high scores in terms of perceptual accuracy, helping to locate the anatomical parts, the role of model guidance during surgery, and the potential for improving surgical safety (4.22, 4.19, 4.16, and 4.28 points respectively). Eight patients healed well without perioperative complications. CONCLUSION By providing real-time stereotactic visualization of anatomy of surgical site and guiding the operation process through 3D model, mixed reality technique could improve the accuracy and safety of the excision of oral and maxillofacial tumors.
Augmented Reality ; China ; Humans ; Imaging, Three-Dimensional ; Neoplasms ; Retrospective Studies ; Surgery, Computer-Assisted

Objective To investigate the techniques and influence factors for the respiratory navigator echo triggered whole-heart coronary MR angiography(WH-CMRA)and evaluate its application in visualizing coronary arteries and the image quality.Methods Ninety two volunteers were acquired with WH-CMRA at 3 T MR scanner using respiratory navigator-echo gated TFE sequence.Imaging quality was visually graded as 0—Ⅳ grade according to the visual inspection,average length,diameter and sharpness of coronary arteries.The correlation between the imaging quality and respiratory pattern,heart rate and navigator efficiency was analyzed.Results The imaging quality in 92 cases was that 28 were graded as Ⅳ, 53 were graded as Ⅲ,9 were graded as Ⅱ and 2 were graded as Ⅰ.The successful rate of scan was 88% (81/92).The imaging quality is mainly graded as Ⅳ when the heart rate was less than 75 beats per minute (bpm)and the sharpness of vessel was(48?11)%.When heart rate was more than 75 bpm,the image quality was mostly graded as Ⅲ and the sharpness was(33?15)%.The correlation between heart rate and imaging quality score was negative(r=-0.726,P0.05).Conclusion 3 T WH-CMRA technique could facilitated the visualization of whole coronary arteries at free breathing but having indications on heart rate.

OBJECTIVETo investigate the role of mitochondrial calcium uniporter in cardioprotection elicited by ischemic postconditioning (Postcond).

METHODSMale Sprague-Dawley rats were used for Langendorff isolated heart perfusion. The hearts subjected to global ischemia for 30 min followed by 120 min of reperfusion. Left ventricular developed pressure (LVDP), maximal rise/fall rate of left ventricular pressure (± dP/dtmax) were measured. The level of lactate dehydrogenase (LDH) in the coronary effluent was measured spectrophotometrically, the content of formazan of myocardium was also measured at the end of reperfusion.

RESULTCompared to I/R group, Postcond had an significant increase in the mechanical function of the left ventricle, with LDH release reduced and the content of formazan increased. Spermine, the opener of mitochondrial calcium uniporter, deteriorated the mechanical function of left ventricle and decreased the formazan content, and increased LDH release. Ruthenium red, the inhibitor of mitochondrial calcium uniporter, increased the mechanical function of the left ventricle, decreased the LDH release, but the content of formazan was not increased.

CONCLUSIONThe inhibition of mitochondrial calcium uniporter is involved in the mechanisms of ischemic postconditioning.

Animals ; Calcium Channels ; metabolism ; physiology ; Disease Models, Animal ; Formazans ; analysis ; Heart ; physiopathology ; Ischemic Postconditioning ; L-Lactate Dehydrogenase ; analysis ; Male ; Myocardial Reperfusion Injury ; metabolism ; physiopathology ; prevention & control ; Rats ; Rats, Sprague-Dawley

OBJECTIVETo investigate the effect of chronic endurance exercise on microcirculatory reserve capacity of biceps brachii in Chinese rowers and provide a certain basis for the date standard foundation of monitoring of functional status and the foundation of database of reserve capacity of blood of Chinese rowers.

METHODSEmpty stomach in the morning, 77 rowers from different groups and 24 common health people were noninvasive tested by using PeriFlux System 5000, the test indexes include the microcirculatory reserve capacity and other related indexes of biceps brachii. The test sites of all athletes were the same space in biceps brachii of the right side of body, there was no space differences of all athletes . All athletes were tested in the relatively stable functional status, common people were healthy. The test value included basic values and heating values, put the before and after heating of microcirculatory blood perfusion (MBP) as the microcirculatory reserve capacity.

RESULTSHeavyweight female (198. 97 ± 98. 81) > heavyweight male (183. 45 ± 64. 31) > lightweight male (151. 01 ± 65. 96) > lightweight female(140.53 ± 43.22) > common male people(127.21 ± 56.38) > common female people(103.54 ± 33.41), the microcirculatory reserve capacity of each group athletes were higher than common people, except the comparison between lightweight female and common male people, and there was no significant difference among the different group athletes.

CONCLUSIONChronic endurance exercise can improve the microcirculatory reserve capacity of rowers, especially the heavyweight rowers; the normal value of microcirculatory reserve capacity of heavy weight rowers should be more than 160, and lightweight rowers should be more than 120. There was no significant difference among different sex athletes, if the value of microcirculatory reserve capacity is significant lower than normal, it shows that athletes are in the state of fatigue.

Arm ; Athletes ; Female ; Humans ; Male ; Microcirculation ; Muscle, Skeletal ; blood supply ; Sports