Objective:To assess the association of DNA double-strand break repair genes XRCC5 and LIG4 with glioma. Methods:126 patients with glioma (case group) and 120 healthy volunteers (control group) were enrolled. The polymorphisms of XRCC5 loci rs828704 and rs9288516, LIG4 loci rs3093737, rs3093739 and rs10131 were detected, and their association with the susceptibility to glioma was analyzed. Results:Hardy-Weinberg test showed that XRCC5 loci rs828704 and rs9288516, LIG4 loci rs3093737, rs3093739 and rs10131 were in equilibrium in both groups ( P>0.05). The frequency of A allele of XRCC5 gene rs9288516 locus and T allele of LIG4 gene rs10131 locus in the case group was higher than that in the control group ( P<0.05). XRCC5 rs9288516 and LIG4 rs10131 were associated with the susceptibility to glioma under both recessive and additive models ( P<0.05), while LIG4 rs3093739 was associated with susceptibility to glioma under the recessive model ( P<0.05). Conclusion:XRCC5 rs9288516 and LIG4 rs10131 are associated with the susceptibility to glioma. Above finding may provide a reference for the prevention and treatment of glioma.

Objective: To evaluate the efficacy of dynamic locking screw combined with plate internal fixation for tibial fractures. Methods: A retrospective case-control study was conducted to analyze the clinical data of 36 patients with tibial fractures (AO 4A-C) admitted to the Second Affiliated Hospital of Army Medical University from March 2017 to March 2018. There were 27 males and nine females, aged 26-71 years [(51.6±14.3)years]. A total of 18 patients were treated with dynamic locking screw combined with locking plate internal fixation (Group A), and another 18 patients received common locking screw combined with locking plate internal fixation (Group B). The operation time, intraoperative bleeding, hospital stay, visual analogue score (VAS), callus growth and fracture healing rate at 4, 8, 12 and 24 weeks after operation were compared between the two groups. At the same time, the complications of internal fixation were evaluated, including screw loosening, screw fracture and steel plate fracture. Results: All the patients were followed up for 8-18 months [(12.2±2.7)months]. There was no significant difference in operation time, intraoperative bleeding, postoperative hospital stay and postoperative VAS between the two groups (P>0.05). At 8 and 12 weeks after operation, the callus growth rate of Group A was 61% and 83% respectively, significantly higher than those of Group B (28% and 50%) (P<0.05). At 8, 12, and 24 weeks after operation, the fracture healing rate of Group A was 17%, 50% and 100% respectively, and those of Group B was 6%, 28% and 89%, showing no significant difference between the two groups (P>0.05). No complications or failure of internal fixation were found during the follow-up. Conclusion For tibial fractures, the locking plate internal fixation can achieve satisfactory clinical outcome, but the dynamic locking screw system can promote the growth of callus at early stage.

Objective:To study urine albumin excretion (UAE) and its related factors in patients with essential hyper‐tension (EH) .Methods :A total of 113 EH patients without significant target organ damage were enrolled as EH group ,while another 92 healthy subjects were regarded as healthy control group .Ratio of morning urinary albumin to creatinine was measured and regarded as UAE index .Plasma homocysteine (Hcy) ,serum uric acid ,creatinine , blood urea nitrogen ,blood glucose ,blood lipids etc .levels were measured ,and compared between two groups Re‐sults:Compared with healthy control group ,there were significant rise in UAE ,body mass index (BMI) ,waist hip ratio ,blood pressure ,pulse pressure ,heart rate ,plasma levels of triglyceride (TG) ,low density lipoprotein choles‐terol (LDL‐C) ,serum uric acid and Hcy (P<0.05 or <0.01) ,and significant reduction in level of high density lip‐oprotein cholesterol (HDL‐C) in EH group ( P=0.001) .Pearson correlation analysis indicated that lgUAE was pos‐itively correlated with lgTG (r=0.257 ,P=0.015) and estimated glomerular filtration rate (eGFR ,r=0.284 ,P=0.007) ,and inversely correlated with lg creatinine (r= -0.277 ,P=0.008) in healthy control group ,while in EH group ,lgUAE was positively correlated BMI (r=0.231 ,P=0.014) ,lgTG (r=0.200 ,P=0.034) and lgHcy (r=0.244 , P=0.009) .Muti-factor gradual regression analysis indicated that lg TG (β=0.265 ,P=0.001) and lg Hcy (β=0.170 , P=0.012) were independently positively correlated with lg UAE , R2 =0.112.Conclusion:UAE level significantly rises in EH patients ,and it′s significantly positively correlated with plasma levels of TG and Hcy .

Objective To evaluate the radiation protective efficacy of different types and the positions of ceiling-suspended lead shield to the principal and assistant interventional operators in order to provide a scientific basis for the selection of optimal scheme in using ceiling-suspended lead shield.Methods At the principal and assistant interventional operators’ standing places the personal dose-measuring instruments were set up, which were placed at the height of 20 cm to 180 cm above the ground with an interval distance of 20 cm between each other.The postero-anterior (PA) projection and left lateral projection were used.The ceiling-suspended protection lead shields included lead glass (glass type) and lead glass with connected lead flexible stripe below (mixed type).The placed sites of the protection lead-shields were close to the principal operator, away from the principal operator, on the left side of the principal operator and close to the X-ray tube respectively.The radiation doses of PA projection and left lateral projection were determined.The real-time radiation dose rate and dose shielding rate at the nine measuring positions for the principal operator and assistant operator were separately calculated.The results were analyzed.Results The radiation protection of the glass type was slightly superior to that of the mixed type, but the difference was not significant.The principal operator was best protected when the shield was positioned close to him in the PA projection, and for left lateral projection the principal operator was best protected when the shield was positioned on his left side.For the assistant operator, the optimal protection was obtained when the shield was positioned close to him in both PA and left lateral projection.In the optimal position of ceiling-suspended lead shield, the highest radiation dose rate (0.71 mSv/h in glass group and 1.07 mSv/h in mixed group) was recorded on the principal operator at the height of 120 cm at PA projection, and higher radiation dose rate (≥0.47 mSv/h) was recorded on every point of both operators at the left lateral projection.Meanwhile, the overall received radiation doses of the two groups were very close.At the principal operator standing area, except for the position of 120 cm height (attenuation ratio 60.11% in glass group and 39.89% in mixed group), the attenuation ratio of each measuring point was above 93%.And the assistant operator standing area the attenuation ratio was 57%-97%.The lateral shielding ratio was generally slightly higher than PA shielding ratio.Conclusion The radiation protection effect of the two type shields is quite similar, both shields can obtain excellent protection efficacy.But the radiation dose at the height of 120 cm above the ground at PA projection is higher for the principal operator, while at lateral projection the radiation dose at all height levels is still relatively higher for both operators.Therefore, the radiation protection at the level of 120 cm height needs to be strengthened and the lateral projection exposure should be used as less as possible.

BACKGROUND:Bone marrow mesenchymal stem cels have a therapeutic effect on acute lung injury, but the mechanism is unclear. If the mechanism is understood, the majority of patients with acute lung injury can obtain a benefit. OBJECTIVE:To explore the possible mechanism underlying bone marrow mesenchymal stem cels in the treatment of acute lung injury with sepsis in rats. METHODS: (1) Thirty-six adult Wistar rats were randomly divided into three groups, sham operation group (sham group), sepsis group and bone marrow mesenchymal stem cels group (cel treatment group). In the sepsis and cel treatment groups, animal models of sepsis with acute lung injury were established by cecal ligation and puncture, while in the sham group, the cecum was not ligated and punctured. Then, 1 mL normal saline was injected via the femoral vein in the sepsis and sham groups, and 1 mL bone marrow mesenchymal stem cel suspension (1×109/L) was injected into the cel treatment group. After 6 hours, interleukin 10 and macrophage inflammatory protein-2 levels in serum were measured in the three groups. Lung tissues were taken for pathological observation using hematoxylin-eosin staining. (2) Rat alveolar macrophages were obtained by bronchoalveolar lavage, seeded into 24-wel culture plates, and divided into three groups: control group (group A), sepsis model group (group B) and intervention group of bone marrow mesenchymal stem cels (group C). Normal saline, septic plasma, and co-intervention of septic plasma and mesenchymal stem cels were used in the groups A, B, C, respectively. Then, cels in the three groups were cultured in a 5% CO2 incubator at 37℃ for 1 hour. After that, alveolar macrophages were taken to detect whether nuclear factor-κB (P65) protein entered into the nucleus using laser scanning confocal microscopy. RESULTS AND CONCLUSION: (1) The results of animal experiments showed that compared with the sham group, the macrophage inflammatory protein-2 levels in the sepsis group and cel treatment group were significantly increased (P < 0.05), but the macrophage inflammatory protein-2 level in the cel treatment group was significantly lower than that in the sepsis group (P < 0.05); there were no significant differences in serum interleukin 10 levels among the three groups (P > 0.05); inflammatory cel infiltration, interstitial pulmonary edema and pulmonary hemorrhage existed in the sepsis and cel treatment groups, but these symptoms were significantly reduced in the cel treatment group compared with the sepsis group. (2) Results from cel experiments showed that compared with the group A, in group B and group C, the number of nuclear factor-κB (P65) proteins into the nucleus was significantly higher (P < 0.05), but it was lower in the group C than the group B (P < 0.05). These findings indicate that bone marrow mesenchymal stem cels in acute lung injury with sepsis can regulate nuclear factor-κB (P65) protein of alveolar macrophages into the nucleus, reduce expression of macrophage inflammatory protein-2, and thereby play a protective role in the lungvia reducing neutrophil infiltration. Temporarily, this study cannot explain whether bone marrow mesenchymal stem cels have an effect on interleukin 10.

Objective To measure the dose to the primary operator and assistant operators by employing eight beam projections commonly used in coronary angiography with and without radiation protection shields in order to supply helpful guidance on radiation protection in cardiac intervention.Methods From 20 to 180 cm above the ground at the primary and assistant operators' locations,a DoseAware personal dose meter was placed in terms of an increment of 20 cm to measure radiation dose.Eight commonly used beam projections were performed,including LAO (left anterior oblique) 45°,RAO (right anterior oblique) 30°,CRAN (cranial)25°,cranial LAO (LAO45°/25°),caudal LAO(LAO45°/ 25°),CAUD (caudal) 25°,cranial RAO (RAO30°/25°),caudal RAO (caudal RAO30°/25°).Under the two different conditions,with or without radiation protection shields,the doses to the operators in the selected beam projections were respectively recorded at nine measuring positions and the shielding factor were calculated.Results The primary operator was effectively protected with radiation protection shields.In the standing area of the primary operator,except for the position at the height of 120 cm (radiation dose rate:0.35-4.78 mSv/h;shielding factor:27.67％-89.33％),the shielding factor for each measuring position was above 91％.Higher radiation doses were found at caudal LAO,LAO,and cranial LAO.The shielding factor for the assisting operator was lower than for the primary operator.In the standing area of the assisting operator (radiation dose rate:0.27-1.86 mSv/h;shielding factor:30.34％-92.13％),the peak levels were found at the height of 80,100,140 cm.And caudal RAO,caudal LAO,CRAN,LAO were found to have received higher radiation doses.Conclusions Emphasis should be attached to the use of radiation shields in coronary angiography.With radiation protection shields,higher dose is still recorded in caudal LAO,LAO,cranial LAO,caudal RAO.Furthermore,it should be paid more attention to radiation protection at 80-140 cm height,and less prolonged exposure should be employed in those beam projections mentioned above.

Objective To investigate the differences in central hemodynamic indices between hypertensive and normotensive subjects and identify the blood pressure index that the most strongly correlate with arterial stiffness and vascular damage markers. Methods A cohort of 820 hypertensive patients and 820 normotensive individuals matched for age and gender were enrolled in this study. We measured carotid-femoral and carotid-radial pulse wave velocity (PWV), aortic augmentation index (AIx) and central blood pressures using pulse wave analysis and applanation tonometry. Plasma homocysteine (HCY), high-sensitivity C-reactive protein (hsCRP) and N-terminal pro-B-type natriuretic peptide (NT-proBNP) were also tested in these subjects. Results In both hypertensive and normotensive subjects, the central systolic blood pressure (SBP) and pulse pressure (PP) were significantly lower than brachial SBP and PP; this PP amplification was significantly lower in the normotensives (9.85 ± 6.55 mmHg) than in the hypertensives (12.64 ± 6.69 mmHg), but the amplification ratios were comparable between the two groups. Blood pressure and age were closely related with aortic arterial stiffness. Compared with normotensive subjects, hypertensive subjects had higher carotid-femoral PWV and AIx, and showed significantly lowered PP amplification ratio with age. Central PP was more strongly related to arterial stiffness and vascular damage markers than the other pressure indices. Multivariate analyses revealed that carotid-femoral PWV and aortic AIx were strongly influenced by central PP but not by the mean blood pressure or brachial PP. Conclusion The central PP is a more direct indicator of central arterial stiffness and a better marker of vascular aging than other blood pressure variables. These findings support the use of central blood pressure as a treatment target in future trials.

Objective To investigate the differences in central hemodynamic indices between hypertensive and normotensive subjects and identify the blood pressure index that the most strongly correlate with arterial stiffness and vascular damage markers. Methods A cohort of 820 hypertensive patients and 820 normotensive individuals matched for age and gender were enrolled in this study. We measured carotid-femoral and carotid-radial pulse wave velocity (PWV), aortic augmentation index (AIx) and central blood pressures using pulse wave analysis and applanation tonometry. Plasma homocysteine (HCY), high-sensitivity C-reactive protein (hsCRP) and N-terminal pro-B-type natriuretic peptide (NT-proBNP) were also tested in these subjects. Results In both hypertensive and normotensive subjects, the central systolic blood pressure (SBP) and pulse pressure (PP) were significantly lower than brachial SBP and PP; this PP amplification was significantly lower in the normotensives (9.85 ± 6.55 mmHg) than in the hypertensives (12.64 ± 6.69 mmHg), but the amplification ratios were comparable between the two groups. Blood pressure and age were closely related with aortic arterial stiffness. Compared with normotensive subjects, hypertensive subjects had higher carotid-femoral PWV and AIx, and showed significantly lowered PP amplification ratio with age. Central PP was more strongly related to arterial stiffness and vascular damage markers than the other pressure indices. Multivariate analyses revealed that carotid-femoral PWV and aortic AIx were strongly influenced by central PP but not by the mean blood pressure or brachial PP. Conclusion The central PP is a more direct indicator of central arterial stiffness and a better marker of vascular aging than other blood pressure variables. These findings support the use of central blood pressure as a treatment target in future trials.

BACKGROUNDArterial stiffness is well known as an important risk factor for coronary artery disease. In this study, we aimed to investigate the association between carotid-ankle pulse wave velocity (caPWV) and risk of coronary artery disease (CAD), and the interaction between pulse wave velocity (PWV) and other potential risk factors of CAD.

METHODSA community-based cross-sectional study was conducted for subjects living in Beijing, China. We collected 213 subjects with coronary artery disease and 1 266 subjects without CAD between September 2007 and January 2009 in a community center of Beijing. A multivariate Logistic regression analysis was carried out to assess the odds ratios of factors related to CAD.

RESULTSWe found CAD subjects were more likely to have a higher body massindex (BMI), fasting glucose, uric acid, low-density lipoprotein (LDL) cholesterol, high-sensitivity Creactive protein (hs-CRP), carotic-femoral pulse wave velocity (cfPWV) and caPWV (P < 0.05), and CAD subjects had a significantly lower HDL cholesterol levels (P < 0.05). Moreover, the proportion of hypertension in CAD subjects was significantly higher than non-CAD subjects. The multiple Logistic regression analysis showed that hypertension, higher uric acid, hs-CRP, cfPWV and caPWV levels significantly increased the risk of CAD, with ORs (CI) of 1.47 (1.25-1.74), 1.17 (1.01-1.26), 1.35 (1.10-1.67), 1.15 (1.09-1.19) and 1.07 (1.01-1.15), respectively. Higher HDL cholesterol was significantly associated with reduced risk of CAD, with ORs (CI) of 0.58 (0.40-0.83). In addition, cfPWV had significant association with age, hypertension, LDL cholesterol, with Pearson's coefficients of 0.166, 0.074, and 0.030, respectively.

CONCLUSIONScfPWV and caPWV are independently associated with significant CAD, and cfPWV has significant correlation with age and hypertension. cfPWV and caPWV may be used as a practical tool for predicting the risk of CAD.

Adult ; Aged ; Aged, 80 and over ; Coronary Artery Disease ; epidemiology ; physiopathology ; Cross-Sectional Studies ; Female ; Humans ; Logistic Models ; Male ; Middle Aged ; Risk Factors ; Vascular Stiffness ; physiology ; Young Adult

BACKGROUNDN-terminal pro-B-type natriuretic peptide (NT-proBNP) and high-sensitivity cardiac troponin T (hs-cTnT) are excellent biomarkers for detecting heart failure and subclinical myocardial injury. However, it remains unclear whether subclinical myocardial injury is associated with NT-proBNP elevation in a community based population.

METHODSIn a community based study, levels of hs-cTnT and of NT-proBNP were determined in 1 497 participants older than 45 years. The lower detection limit of the hs-cTnT assay used in the present study was 0.003 ng/ml. The association of hs-cTnT levels and NT-proBNP levels was analyzed.

RESULTSWhen the subjects with undetectable (<0.003 ng/ml), intermediate (0.003-0.014 ng/ml), and elevated (≥0.014 ng/ml) levels of hs-cTnT were compared (r = 0.175, P < 0.001), a strong association between the hs-cTnT levels and NT-proBNP levels was observed (β = -0.206, P < 0.001; β = -0.118, P < 0.001, respectively). In multivariable analyses, older age and hs-cTnT were positively and independently associated with NT-proBNP levels (β = 0.341, P < 0.001; β = 0.143, P < 0.001, respectively), and male gender and the levels of eGFR were inversely and independently associated with NT-proBNP levels. When the subjects with normal or elevated NT-proBNP were analyzed separately, the hs-cTnT level was not an independent predictor for the NT-proBNP level in the normal NT-proBNP group, whereas the hs-cTnT level was the only independent predictor for NT-proBNP level in the elevated NT-proBNP group (β = 0.399, P < 0.01).

CONCLUSIONSIn this community based population, NT-proBNP elevation was common. In addition to female gender and older age, subclinical myocardial injury indicated by the hs-cTnT level was another important factor in NT-proBNP elevation.

Biomarkers ; analysis ; Female ; Humans ; Male ; Middle Aged ; Natriuretic Peptide, Brain ; blood ; Peptide Fragments ; blood ; Troponin T ; blood