Objective:To study the biocompatibility of porous Ti processed by laser solid forming(LSF)with osteoblasts.Methods:SD rat osteoblasts were seeded on porous Ti surface processed by LSF.Adhesion,proliferation and ALP activity of the osteoblasts were measured at different time,and all samples were observed under SEM.Dense sand-blasted Ti sheets were used as the controls.All data were statistically analyzed.Results:Adhered cells on porous Ti were more than those on nonporous Ti sheets after 2 and 3 hours of culture(P <0.05).At 4 and 7 days,cell proliferation and ALP activity were significantly higher on porous Ti than those on the controls(P <0.05).Conclusion:Porous Ti processed by LSF possesses good biocompatibility with osteoblasts.

Objective To discuss the polymorphisms of asthma susceptibility gene ORMDL3 in infantile wheezing,in order to provide a theoretical basis for early diagnosis of asthma.Methods One hundred and fifty wheezing infants were recruited and divided into 2 groups as asthma predictive index(API) positive group(n =80) and negative group (n =70).Taqman probe was applied to detect the genotypes of 2 single nucleotide polymorphisms (SNPs)in childhood asthma susceptibility gene ORMDL3,which were rs4794820 and rs7216389.The genotype distributions were analyzed and compared between 2 groups,and the correlations among genotype distribution and tidal breath pulmonary function,fractional exhaled nitric oxide (FeNO) concentration,percentage of eosinophils (EOS％),serum immune globulin E (total IgE) levels respectively were also analyzed,respectively.Results (1) The frequencies of rs4794820 AG and rs7216389 TC heterozygotes in the API positive group were the highest,which were significantly higher than those in the negative group(58.75％ vs.31.42％,56.25％ vs.32.86％ respectively,all P ＜0.01).The frequencies of GG and TT homozygotes in the API negative group were the highest,which were significantly higher than those in the positive group (58.57％ vs.30.00％,57.14％ vs.31.25％ respectively,all P ＜0.01).(2)The time to reach the peak expiratory flow in tidal breathing over the total expiratory time (TPTEF/TE) and the volume to reach the peak expiratory flow in tidal breathing over the total expiratory volume (VPEF/VE) of the infants in the API positive group were less than those in the API negative group(16.87 ±5.31 vs.20.12 ± 5.23,20.87 ± 5.92 vs.25.56 ± 6.77,respectively),and the FeNO concentration was higher than that in the API negative group [(22.44 ± 9.77) ppb vs.(13.23 ± 7.90)ppb],and the differences were significant (t =-3.776,-4.490,6.377,respectively;all P ＜ 0.01).(3) In the API positive group,the TPTEF/TE and VPEF/VE of the infants who expressed AG/TC genotype were lower than those who expressed GG/TT genotype (14.55 ± 4.83 vs.19.91 ± 4.17,18.85 ± 4.26 vs.25.20 ± 7.06,respectively,t =-4.727,-3.976,all P ＜ 0.01);while the FeNO concentrations,EOS％ and total IgE levels were higher than those who expressed GG/TT genotype [(25.02 ± 8.77) ppb vs.(18.39 ± 6.56) ppb,7.16 ± 2.62 vs.5.50 ± 1.34,(366 727 ±275 533) IU/L vs.(166 826 ± 62 865) IU/L,respectively] (t =3.484,3.409,4.589 respectively;all P ＜ 0.01).Conclusions Childhood asthma susceptibility gene ORMDL3 SNPs rs4794820 AG and rs7216389 TC heterozygotes are the risk factors for API positive infantile wheezing.The pulmonary function damage and airway inflammation of the infants who expressed AG/TC genotype are more serious than those who expressed GG/TT genotype,and more likely to develop persistent asthma.

Objective : To identify the factors affecting microvascular complications among patients with type 2 diabetes (T2DM), so as to provide insights into the management of microvascular complications of T2DM. Methods: T2DM patients hospitalized in the Department of Endocrinology of a tertiary hospital in Weifang City, Shandong Province from January 2021 to January 2022 were enrolled, and subjects' basic information, lifestyle and medical history were collected using questionnaire surveys. Fasting insulin, fasting blood glucose and glycated hemoglobin were measured, and factors affecting microvascular complications were identified among T2DM patients using a multivariable logistic regression model and a decision tree model. Results: Totally 1 003 T2DM inpatients were enrolled, including 515 men (51.35%) and 488 women (48.65%), and the prevalence of microvascular complications was 40.18%. Multivariable logistic regression analysis showed that age of 60 years and older (OR=2.510, 95%CI: 1.441-4.374), T2DM duration of 10 years and longer (OR=3.205, 95%CI: 2.242-4.581), fasting insulin of lower than 3.21 μIU/mL (OR=1.749, 95%CI: 1.239-2.469), using of agents or insulin to control blood glucose (OR=1.880, 95%CI: 1.143-3.092), glycated hemoglobin level of 7% and higher (OR=1.751, 95%CI: 1.172-2.615) as factors affecting microvascular complications among T2DM patients. Decision tree analysis identified course of T2DM as a major factor affecting the risk of microvascular complications among T2DM patients, and the prevalence of microvascular complications was 70.22% among T2DM patients with disease course of 10 years and longer and fasting insulin of lower than 3.21 μIU/mL or 16.32 μIU/mL and higher, 44.23% among T2DM patients with disease course of 5 to 10 years and at ages of 60 years and older, and 43.10% among T2DM patients with disease course of less than 5 years and fasting insulin of lower than 3.21 μIU/mL. Conclusion Advanced age, long course of T2DM, low fasting insulin and high glycated hemoglobin may increase the risk of microvascular complications among T2DM patients.

Objective To investigate the relationship between high-sensitivity C-reactive protein (hsCRP) and retinal vascular diameter.Methods This study was a cross-sectional study,the population was from the Kailuan study (clinical trial research registration NO.:ChiCTR-TNC-1100 1489) in 2012-2013 (age ≥ 40 years).All the people was checked by cardiovascular and epidemiological examination,of which 3 447 people had an analytical results of fundus color photography.The retinal vascular diameter was analyzed by software.Take the value of hsCRP 1％ to 99％ points and 3 363 people were finally included in the statistical analysis.The mean age of 3 363 people (male 1 880,female 1 483) was 56.69± 10.10 years old.The correlation between hsCRP and central retinal artery equivalent (CRAE),central retinal vein equivalent (CRVE),arteriovenous ratio (AVR) were evaluated by Spearman correlation coefficient.Multivariate linear regression analysis was used to futher analyze the association between hsCRP and retinal fundus diameter parameters.Results The median value of hsCRP was 1.10 (0.50,2.21) mmo/L,CRAE was (174.16±24.36) μm,CRVE was (282.70±26.32) μm,AVR was 0.62-±0.09.Spearman correlation analysis showed that hsCRP was positively correlated with CRVE (r =0.052,P =0.003) and negatively correlated with AVR (r =-0.052,P =0.002).The non-normal variables hsCRP were transformed into continuous variables lghsCRP,and CRAE,CRVE and AVR were used for multivariate linear regression analysis.After a number of factors were gradually corrected,the results showed that association between lghsCRP and CRVE (β =3.428) or AVR (β =-0.006) was statistically significant (P＜0.05).LghsCRP was a risk factor for CRVE both in men and women after the calculation of gender stratification.Conclusions CRVE increased and AVR decreased with the increase of hsCRP.The changes of retinal vascular diameter may be associated with hsCRP as a marker to predict cardiovascular and cerebrovascular disease.

At present, there is still a lack of comprehensive diagnosis and treatment criteria for pancreatic exocrine insufficiency around the world. Pancreatic surgeons often ignore or misjudge pancreatic exocrine insufficiency secondary to pancreatic cancer, and as a result, pancreatic exocrine insufficiency is not adequately treated, which greatly affects the quality of life of patients with pancreatic cancer. This article summarizes the latest research advances in the pathogenesis, typical symptoms, and diagnostic methods of pancreatic exocrine insufficiency, as well as pancreatic enzyme replacement therapy in different stages of pancreatic cancer. It is pointed out that pancreatic enzyme replacement therapy can significantly improve the quality of life of patients with different stages of pancreatic cancer.

Objective Childhood asthma is closely related to MP infection.This study was to investigate the distribution of ORMDL3 and HLA-DQ gene SNP in children with MP-associated asthma and gene-gene interactions.Methods One hundred and ninety-four patients with MP infection were enrolled.Extraction of whole blood genomic DNA was carried out.The genotype was collected by Flnidigm Juno 96.96 Genotyping integrated fluid pathway system.The patients were divided into MP-asthma group and MP-non-asthma group.Gene-gene interaction was analyzed by generalized multifactor dimensionality reduction.Results MP-asthma group included 63 cases (32.5％),MP-non asthma group included 131 cases (67.5％).ORMDL3 gene rs4794820 had three genotypes of AG,GG,AA.,MP-asthma group GG genotype and G allele frequency was higher than that in MP-non-asthma group.The frequency of AA genotype was the lowest among the two groups,but in the MP-non-asthma group were higher than that in the MP-asthma group.The rs7216389 had three genotypes of TT、TC、CC,the frequency of TT genotype and T allele in MP-asthma group was significantly higher than that in MP-non-asthma group.The frequency of CC genotype was the lowest among the two groups,but CC genotype in MP-non-asthma group was significantly higher than that in MP-asthma group.The rs794820 GG genotype and rs7216389 TT genotype were found to be risk factors.ORMDL3、HLA-DQA1 and HLA-DQA2 have gene-gene interaction.Conclusion MP infection is an important external cause of asthma in children.The genotype of rs7794820 GG genotype and rs7216389 TT genotype are an important internal cause of asthma after childhood MP infection.ORMDL3 rs4794820,rs7216389 and HLA-DQA1 rs9272346,HLADQA2 rs7773955 have gene-gene interaction,synergistically enhance the risk of asthma associated with asthma in children with MP.

Objective To analyze the clinical outcomes of a standard protocol of open reduction and internal fixation using a variable angle foot plate for a consecutive series of patients with acute Lisfranc joint injury.Methods This study retrospectively evaluated the clinical outcomes of 11 Chinese patients(13 feet) with acute Lisfranc joint injury who had been treated by open reduction and internal fixation with a variable angle foot plate from December 2016 to June 2017 at Department of Orthopaedics,West China Hospital.They were 8 men(10 feet) and 3 women(3 feet),aged from 19 to 57 years(average,36.4 years).Of them,10 were complicated with fracture of metatarsus,6 with cuneiform fracture and/or dislocation,4 with cuboid fracture,and one with cuboid fracture.According to the Myerson classification for Lisfranc fracture-dislocations,one case(one foot) belonged to type A,2(2 feet) to type Bl,5(6 feet) to type B2,2(3 feet) to type Cl and one(one foot) to type C2.The outcomes were evaluated using the visual analogue scale(VAS) and the midfoot scores of American Orthopedic Foot and Ankle Society(AOFAS).Results This cohort was followed up for 18 to 24 months(average,22 months).Their VAS scores were decreased significantly from preoperative 7.3±1.2(from 6 to 9) to postoperative 1.2±0.2(from 0 to 2)(P<0.05);their AOFAS midfoot scores were increased significantly from preoperative 0 to postoperative 84.6±4.6(P<0.05) Anatomic reduction was obtained in all the patients and all the fractures united successfully without any delayed union or nonunion.Superficial necrosis of the wound edge occurred in 2 cases without deep infection;skin anesthesia occurred in 2 and skin hypesthesia in 4,indicating a lesion of the superficial peroneal nerve.Conclusion Fixation of acute Lisfranc joint injury with a variable angle foot plate can lead to rigid stability,precise reduction and satisfactory short-term clinical outcomes.

Objective Hepatitis A immunization strategies were carried out in 2001 in Tianjin. We wanted to evaluate the effectiveness of the strategies related to hepatitis A control programs and to provide the basis for further modification of the strategies. Methods Descriptive epidemiology study was used to analyze the hepatitis A epidemic situation in 2000-2011 in Tianjin and to evaluate the disease reporting system. Hepatitis A vaccine coverage of target population and serum epidemiological study were carried out in 1999,2005 and 2010 to check on the hepatitis A antibody levels so as to evaluate the immuno-barrier condition in the normal population. Cox-Stuart test was used to analyze the epidemic trend of hepatitis A and other intestinal infectious diseases in Tianjin. Results The incidence rate of hepatitis A decreased from 2.89/100 000 in 2000 to 0.12/100 000 in 2011,and the percentage of hepatitis A in all types of viral hepatitis decreased from 8.02%in 2000 to 0.48% in 2011 in Tianjin. The positive rates of hepatitis A antibody also increased in the residents. Conclusion The hepatitis A vaccination program was successful in the programs on prevention and control of hepatitis A in Tianjin,China.

Objective To investigate the differences in clinical features between the primary biliary cholangitis(PBC)patients with negative or positive anti-mitochondrial antibody(AMA)by analyzing related immune and biochemical parameters.Methods This study was conducted among the patients who attended Beijing Ditan Hospital,Capital Medical University,from January 2013 to December 2022 and were diagnosed with PBC,and they were divided into AMA negative group with 139 patients(24.5%)and AMA positive group with 428 patients(75.5%).Propensity score matching at a ratio of 1∶1 was performed with age and sex as matching factors and a matching tolerance of 0.06.Liver function,coagulation,and immune parameters on admission were analyzed,as well as the changes in liver function and other indicators after 6 months of treatment and the response to ursodeoxycholic acid(UDCA)at 6 and 12 months of treatment.The independent-samples t test was used for comparison of normally distributed continuous data between two groups,and the Mann-Whitney U rank sum test was used for comparison of non-normally distributed continuous data between two groups;the chi-square test was used for comparison of categorical data between two groups.Results There were 139 AMA-negative PBC patients and 139 AMA-positive PBC patients after propensity score matching.Compared with the AMA positive group on admission,the AMA negative group had significantly lower levels of direct bilirubin and globulin(Glo)and significantly higher levels of albumin,albumin/globulin ratio,prealbumin,and fibrinogen(all P<0.05).After 6 months of UDCA treatment,there were significant differences in Glo and prealbumin between the AMA negative group and the AMA positive group(P<0.05).Both the AMA negative group and the AMA positive group had an increase in prealbumin after 6 months of treatment,and the AMA negative group had a significantly greater increase than the AMA positive group(U=41.00,P=0.015).After UDCA treatment for 6 and 12 months,there was no significant difference in treatment response to UDCA between the AMA negative group and the AMA positive group(all P>0.05).Conclusion After matching for age and sex,compared with the AMA-positive PBC patients,the AMA-negative PBC patients tend to have a milder degree of liver inflammation and damage,significantly greater improvements in inflammation and liver synthesis ability after UDCA treatment,and better response to UDCA.