Objective To study the association between renal dysfunction and platelet parameters in elderly patients with early heart failure (HF).Methods 637 patients (350 old-aged and 287 middle-aged) with hypertension,CHD,T2DM admitted to our hospital from January 2013 to December 2014 served as a disease group and 464 subjects (229 old-aged and 235 middle-aged) selected from the 973 Aging Project in September 2007-June 2008 served as a healthy group.Their eGFR and platelets (PLT) were calculated,their plateletcrit (PCT) and mean platelet volume (MPV) were measured.Association between platelet parameters and renal dysfunction was analyzed by binary logistic regression analysis.Results The MPV and PCT were significantly lower in the old-aged disease group than in the old aged healthy group (9.78± 1.45 vs 10.66±0.78,P＜0.01;19.79 ± 6.21 vs 21.82 ± 6.04,P＜0.01).The PLT and PCT were closely associated with the eGFR in two groups (P＜0.05,P＜0.01).Binary logistic regression analysis indicated that the median and high PLT in disease group and the median PLT in healthy group were independently associated with renal dysfunction (OR=0.560,95％CI:0.315-0.996;OR=0.480,95％CI:0.262-0.879;OR=0.483,95％CI:0.249-0.936,P＜0.05).Conclusion Attention should be paid to the effect of PLT and their functional activity on renal function in treatment of early HF patients because aging-induced change of PLT and their functional activity are associated with renal dysfunction.

Objective An ELISA-based assay for detecting alloantibodies against FⅧ was established to estimate the incidence of alloantibodies against FⅧ in treated patients with hemophilia A. Methods One hundred and forty patients with hemophilia A and 80 healthy controls were enrolled. Among hemophilia A patients, 84, 34 and 22 patients were in severe, moderate and mild conditions respectively. All patients were treated with plasma-derived FⅧ concentrates before. The titer wells were coated with MoAb against FⅧ which was developed in our laboratory. Then human recombinant FⅧ concentrates were applied. After incubation in room temperature for 2 hours, diluted plasma samples and HRP-conjugated goat anti-human IgG were added successively. Finally Absorbance (A490) were measured and recorded. Inhibitor activity against FⅧ for all plasma samples was measured by a modified Nijmegen assay simultaneously. Results The results showed that alloantibodies against FⅧ were found in 40.0% (56/140) patients by ELISA. And the alloantibody incidences in the severe and non-severe patients were 47.6% (40/84) and 28.5% (16/56)respectively. There was statistical significance between these two categories (x2 = 5.079, P ＜ 0.05 ). The FⅧ inhibitor activity was detected in 24.3% (34/140) patients by modified Nijmegen assay. The inhibitor incidences in the severe and non-severe patients were 33.3% (28/84) and 10.7% (6/56) respectively.There was statistical significance (x2 = 9.349, P ＜ 0.05). Twenty-five patients were positive for FⅧ alloantibodies by ELISA but had no FⅧ inhibitor activity by the modified Nijmegen assay. The positive rates of FⅧ alloantibodies and inhibitor activity were 40.0% (56/140) and 24.3% (34/140) respectively,which had significant difference (x2 = 15.75, P ＜ 0.01 ) and strong positive correlation ( rn = 0.59, P ＜0.01 ). Meanwhile the results deduced from these two tests shared a high consistency rate ( Kappa = 0.55,P ＜0.01 ). Conclusions The detection rate for alloantibodies against F Ⅷ is enhanced by our newlydeveloped ELISA. Our results suggest that the occurrence of the alloantibodies against F Ⅷ in Chinese hemophilia A patients is not rare and the alloantibody incidence is preponderant in the patients with severe hemophilia A compared with non-severe hemophilia A patients.

Most main oilfields in China have already entered a "double high" development stage (high water cut, high recovery degree). To further enhance oil recovery in reservoirs after polymer flooding (RAPFs), an efficient activator formulation for promoting metabolism of endogenous microorganism was studied by aerogenic experiments, physical simulation experiments, electron microscopy scanning and pyrophosphate sequencing. Results show that the activator could activate the endogenous microorganisms in the injected water and make the pressurized gas reach 2 MPa after 60 d static culture of the activator in a high pressure vessel. The oil recovery efficiency of natural core physical simulation flooding can be improved by more than 3.0% (OOIP) in RAPFs when injected 0.35 PV activator with 1.8% mass concentration, and a lot of growth and reproduction of activated endogenous microorganism in the core was observed by electron microscopy scanning. Field trial with 1 injector and 4 producers was carried out in the east of south II block of Sa Nan in December 2011. By monitoring four effective production wells, changes of carbon isotope δ13C (PDB) content of methane and carbon dioxide were -45 per thousand to -54 per thousand and 7 per thousand to 12 per thousand. Compared with east II of Sa Nan block, the oil amount increased by 35.9%, water cut stabled at 94%. The incremental oil was 5 957 t during the three and a half years, which provides an alternative approach for further improving oil recovery in similar reservoirs.
Carbon Dioxide ; chemistry ; Carbon Isotopes ; analysis ; China ; Diphosphates ; chemistry ; Methane ; chemistry ; Oil and Gas Fields ; microbiology ; Polymers ; Water ; Water Microbiology

Two γ-glutamyl-cysteine peptides (γ-GCPs ) , ( SC2 RC7 )-γ-L-glutamyl-S-allyl-L-cysteine ( 1 ) and ( SC2 RC7 )-γ-L-glutamyl-S-propyl-L-cysteine ( 2 ) have been isolated from fresh garlic scales using ion-exchange chromatography and pre-HPLC. Their molecular structures were identified by HPLC-MS, CD, 1 H NMR, 13 C NMR, specific rotation and confirmed by the corresponding standard compounds. The influence of exogenously adding 1 and 2 on the bioavailability of iron and zinc from food legume was examined with soybean and mung bean, in the level of 0. 01 mmol/5 g of legume respectively. The enhancing effect of the two γ-GCPs of compound 1 and 2 on bioaccessibility of iron was generally evidenced in the case of soybean ( from 1 . 88% to 6 . 73% and 4 . 42%) and mung bean ( from 2 . 52% to 12 . 04% and 9 . 38%) . The two γ-GCPs similarly enhanced the bioaccessibility of zinc from the food legume, in soybean ranging from 13. 37% to 23. 95% and 20. 58%, and in mung bean from 15. 98% to 28. 44% and 27. 05%. Thus, both compounds 1 and 2 obviously had a promoting influence on the bioavailability of iron and zinc from food legumes. These findings are of practical value in a food-based strategy to enhance the bioavailability of trace minerals for human health.

Objective The relationship between hypertension ( HTN) and ischemic stroke recurrence is unclear , but there may be different effects of HTN on the risk of recurrence .This study aims to explore whether HTN contributes differently to the recur-rence among subtypes of ischemic stroke ( IS) . Methods We eventually enrolled 1114 patients with ischemic stroke from Jul 2008 to Dec 2012 registered in Nanjing Stroke Registry Program (NSRP) in this study.All the patients were classified according to Trial of Org 10172 in Acute Stroke Treatment (TOAST) criteria: 315 (28.3%) patiwnts were classified as Large-artery atheroselerosis (LAA), 212 (19.0%) as cardioembolism (CE), 266 (23.9%) as small-artery occlusion (SAO), and 321 (28.8%) as other de-termined and undetermined etiologies ( Other) .The association between HTN and stroke recurrence in patients with different IS sub-types was analyzed using multivariate Cox regression analysis . Results The average follow-up duration was (19.4 ±10.3) months. Of 1114 patients with IS, 158 (14.2%) patients experienced a recurrent stroke .Patients with HTN had a significantly higher stroke recurrence rate than those without (16.5%vs 10.5%, P<0.05).Multivariate Cox regression analysis indicated that HTN increased the risk of ischemic stroke recurrence (HR=1.722, 95%CI:1.181-2.512, P=0.005).After stratification by TOAST subtypes, analysis revealed an association between HTN and stroke recurrence in LAA( HR=3 .767, 95%CI:1.866-7.585, P=0.001) and SAO (HR=3.530, 95%CI:1.156-12.740, P=0.028), but not in the other subtypes (CE: HR=0.773, 95%CI:0.370-1.615, P=0.493;Other:HR=1.498, 95%CI:0.590-3.807, P=0.395). Conclusion HTN is an independent risk factor for recurrent ischemic stroke and is related to the recurrent ischemic stroke in patients with large-artery and small-vessel disease .

AIM: To explore the regulatory effect of adrenomedullin (ADM) on pulmonary oxidative stress in the rats with pulmonary hypertension induced by high blood flow.METHODS: Healthy male SD rats (n=22) were randomly divided into control group, shunt group and shunt with ADM group.Abdominal aorta and inferior vena cava shunting was produced in the rats in shunt group and shunt with ADM group.After 8 weeks, ADM (1.5 μg·kg-1·h-1) was administered into the rats in shunt with ADM group subcutaneously by mini-osmotic pump for 2 weeks.Mean pulmonary artery pressure (mPAP) was evaluated by a right cardiac catheterization procedure.The ratio of right ventricular mass to left ventricular plus interventricular septal mass [RV/(LV+SP)] and relative medial thickness (RMT) in pulmonary muscularized arteries were calculated.The content of malonaldehyde (MDA), total antioxidative capacity (T-AOC), and activity of superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px) in lung tissues were detected by colorimetry.The expression of NADPH oxidase 4 (NOX4) in the lung tissue was analyzed by Western blot.RESULTS: Compared with control group, the mPAP, RV/(LV+SP) and RMT in pulmonary muscularized arteries in shunt group were all significantly increased.The content of MDA and the expression of NOX4 in the lung tissues were significantly increased.The T-AOC, and activity of SOD and GSH-Px in the lung tissues were significantly decreased.However, mPAP, RV/(LV+SP) and RMT in pulmonary muscularized arteries in shunt with ADM group were significantly decreased as compared with shunt group.Meanwhile, ADM decreased the content of MDA and the expression of NOX4 in the lung tissues, but increased the T-AOC, and activity of SOD and GSH-Px in the lung tissue of shunt rats.CONCLUSION: ADM inhibits oxidative stress response in the development of pulmonary hypertension and pulmonary vascular structural remodeling induced by high pulmonary blood flow in the rats by down-regulating the NOX4 expression and strengthening the anti-oxidation response.

Objective: To analyze factors affecting the delay in the case finding, treatment and diagnosis of tuberculosis among students during 2014-2020，and to provide a reference for the prevention and control measures of tuberculosis among students in Guiyang City. Methods: The medical cases of students with tuberculosis from 2014 to 2020 recorded by "China Disease Prevention and Control Information System" were collected and trend of delays in the detection, treatment, and diagnosis of students with tuberculosis were analyzed, and χ 2 test and multivariate Logistic regression were used to analyze influencing factors. Results: From 2014 to 2020, the rate of delay in the case finding, treatment, and diagnosis of tuberculosis among students in Guiyang showed a relatively stable trend. From 2014 to 2020, Guiyang City reported a total of 1 323 valid cases, the median number of case finding was 16 days,and 48.75% of student TB patients were delayed; the median number of treatment was 11 days, the delay rate of treatment was 43.46%; the median number of diagnosis was 0 day, the diagnosis delay rate was 11.87%. The results of multivariate Logistic regression analysis showed that the floating population was a risk factor for delay in case finding ( OR =1.45), the classification of the source of patients as "other" ( OR =0.19), the level of the first diagnosed unit was county ( OR =0.44), and the type of the first diagnosed unit was general hospital ( OR =0.58) were the protective factors for the delayed case finding of tuberculosis in students( P <0.05). Female ( OR =1.32) and floating population ( OR =1.38) were risk factors for delayed treatment. Floating population ( OR =1.51), rural areas ( OR =4.30), urban fringe ( OR =2.76),non severe patients ( OR =5.99) were risk factors for delayed diagnosis,females ( OR =0.65), ethnic minorities ( OR =0.38), college degree ( OR =0.53), and the first diagnosis unit wae a specialist hospital ( OR =0.22) were protective factors for delayed diagnosis of tuberculosis in students ( P <0.05). Conclusion The rates of tuberculosis case finding and treatment delay among students are common, which warrants targeted prevention and control measures to reduce the incidence of student delays and reduce the risk of tuberculosis cluster epidemics in schools.

Objective:To establish the acute symptomatic osteoporotic thoracolumbar fracture (ASOTLF) classification system, and to examine the reliability and evaluate the effect of clinical application.Methods:A retrospective case series study was conducted to analyze the clinical data of 1 293 patients with osteoporotic thoracolumbar fracture(OTLF) admitted to Honghui Hospital from January 2016 to December 2018. There were 514 males and 779 females, aged 57-90 years [(71.4±6.3)years]. The T value of bone mass density was -5.0--2.5 SD [(-3.1±-0.4)SD]. According to the clinical symptoms a and fracture morphology, OTLF was divided into 4 types, namely type I(I occult fracture), type II(compressed fracture), type III (burst fracture) and type IV(unstable fracture). The type II was subdivided into three subtypes (type IIA, IIB, IIC), and the Type III into two subtypes (type IIIA, IIIB). of all patients, 75 patients (5.8%) were with type I, 500 (38.7%) with type II A, 134 (10.4%) with type IIB, 97 (7.5%) with type IIC, 442 (34.2%) with type IIIA, 27(2.1%) with type IIIB and 18 (1.4%) with type IV. After testing the validity of the classification, different treatment methods were utilized according to the classification, including percutaneous vertebroplasty (PVP) for Type I, PVP after postural reduction for Type II, percutaneous kyphoplasty (PKP) for Type IIIA, posterior reduction and decompression, bone graft fusion and bone cement-augmented screw fixation for Type IIIB, and posterior reduction, bone graft fusion and bone cement-augmented screw fixation for Type IV. The visual analog score (VAS), Oswestry disability index (ODI), Frankel grade of spinal cord injury, local Cobb Angle, and vertebral body angle (vertebral body angle) were recorded in all patients and in each type of patients before surgery, at 1 month after surgery and at the last follow-up. The neurological function recovery and complications were also recorded.Results:The patients were followed up for 24-43 months [(29.9±5.1)months]. A total of 3 000 assessments in two rounds were conducted by three observers. The overall κ value of inter-observer credibility was 0.83, and the overall κ value of intra-observer credibility was 0.88. The VAS and ODI of all patients were (5.8±0.7)points and 72.5±6.6 before surgery, (1.8±0.6)points and 25.0±6.3 at 1 month after surgery, and (1.5±0.6)points and 19.5±6.2 at the last follow-up, respectively (all P<0.05). The Cobb angle and vertebral body angle of all patients were (13.0±9.1)° and (8.0±4.6)° before surgery, (7.9±5.2)° and (4.6±2.9)° at 1 month after surgery, and (9.1±6.0)° and (5.8±3.0)° at the last follow-up, respectively (all P<0.05). At the last follow-up, VAS, ODI, Cobb Angle and VBA of each type of patients were significantly improved compared with those before surgery (all P<0.05). The spinal cord compression symptoms were found 1 patient with type IV and 5 patients with type IIIB preoperatively. At the last follow-up, neurological function improved from grade C to grade E in 1 patient and from grade D to grade E in 5 patients ( P<0.05). The lower limb radiation pain or numbness in 3 patients with type IV and 22 patients with type III preoperatively were fully recovered after surgical treatment at the last follow-up except for three patients. Conclusions:The ASOTLF classification is established and has high consistency and reliability. The classification-oriented treatment strategy has achieved a relatively satisfactory effect, indicating that the classification has a certain guiding significance for treatment of OTLF.

Objective:To explore the relationship between marital status and mild cognitive impairment in older adults.Methods:This study is a cluster random sampling.From January to December 2020, a questionnaire survey was conducted among older adults aged 60 years and over in four cities of Hebei Province.Finally, 2690 older adults with mild cognitive impairment and normal cognitive function were enrolled.The older adults were divided into 2 groups according to their marital status: married and living with their spouses(group E1), divorced or living alone(group E2). The mini-mental state examination(MMSE)scores of older adults in the two groups were compared.Moreover, the cognitive differences of older adults between the two groups and the interaction of marital status, social activities and life events on cognitive outcomes were analyzed.Results:The married older adults with partners had better cognitive preservation( P<0.01). The more life events were more likely to cause cognitive impairment( P<0.01), and the interaction of marital status, social activities and life events had a significant impact on cognition( P<0.01). Older men who were married and lived with spouse had better cognition than older women who were married and lived with spouse( P<0.05 in Model 3). The cognition of widowed elderly women was better than those of widowed elderly men( P<0.1 in Model 1; P<0.1 in Model 2). Among elderly men, the cognition of those married and living with spouse was better than that those of widowed( P<0.01 in models 1 and 2, P<0.1 in model 3). Among elderly women, those married and living with spouse had better cognitive outcomes than those widowed( P<0.01 in Model 1, P<0.01 in Model 2). Conclusions:Marital companionship is a protective factor for the cognition of older adults, and there are gender differences in the impact of marital status on cognition in late life.

Clostridioides difficile infection (CDI) is an infectious disease with fever, abdominal pain and diarrhea as the main clinical manifestations. At present, CDI is mainly treated with antibiotics and faecal microbiota transplantation. As recurrent and refractory CDI continues to increase, it is important to seek a more effective alternative therapy. However, many of the studies on the prevention and control of CDI by probiotics are still in the early stage. This paper summarized the research on the types, mechanisms and technical means of probiotics in the treatment of CDI.