Lung transplantation is the only effective treatment for final stage pneumonopathy. However, bronchitis obliterans, as the main of complication, can prevent the long term survival after lung transplantation. Tracheal epithelium cell is the main target organ of the tardive reject reaction. This paper briefly explains the immunologic mechanism regarding the development of bronchitis obliterans, and the role of tracheal epithelium cell in the study, with aim of exploring the initial relationship between tracheal epithelium cell and bronchitis obliterans, and to find a method to solve the long-term survival of lung transplantation.

Objective To study the therapeutical effects and mechanisms of quercetin on hepatic fibrosis in schistosome-infected mice and compare the effects with praziquantel. Methods Eighty mice were divided into four groups: among them three groups were infected by Schistosoma japonica. After 8 weeks, one group was treated with quercetin 30 mg/(kg?d) for 8 weeks, one group was treated with praziquantel 500 mg/(kg?d) for 2 d and the other was taken as model group without any treatment. The fourth group was taken as normal group. HE staining, RT-PCR, and immunohistochemical technique were used to observe the expression of hepatic c-fos and c-jun mRNA, and the changes of hepatic TGF-?1, type Ⅰ, and type Ⅲ collagen in mice infected by S. japonica before and after treatments. Results Quercetin obviously relieved the degree of hepatic fibrosis, significantly reduced the expression of c-fos, c-jun mRNA, TGF-?1, type Ⅰ, and type Ⅲ collagen compared to the model group (P

Abstract With the rapid development of emerging industries and industrialization in China, soil nickel contamination has become a serious concern, with food being the primary source of nickel exposure to the human body. The level of nickel contamination in food is gennerally higher in developed regions of China. Among different food categories, grains, legumes and aquatic products exhibit relatively higher nickel content and detection rates. Currently in China, the methods for studying nickel dietary exposure risk are relatively conservative, primarily employing point assessment, simple distribution and probability assessment to calculate daily exposure levels among residents and quantifying cumulative exposure risks using the hazard index method. It is found that there is still a certain risk of dietary nickel among residents with younger age groups and under extreme conditions of high consumption or high pollution. Additionally, the cancer risk among the rural population is higher than that among the urban population. This article reviews the research progress on the current status of nickel contamination in Chinese food and the assessment of dietary exposure risk for residents, based on literature from databases such as CNKI and PubMed up to 2023, aiming at providing a reference for future research into nickel exposure and risk assessment in food.

Quercetin and praziquantel were used to treat mice with hepatic fibrosis due to Schistosoma japonicum infection.Quercetin treatment obviously relieved the degree of hepatic fibrosis,significantly reduced the expression of immediate early gene,tissue inhibitor of metalloproteinase 1(TIMP 1),typesⅠ and Ⅲ collagen compared to the control.The expression of c-jun mRNA,typeⅠ and type Ⅲ collagen were reduced significantly compared to the group treated with praziquantel,whereas no difference in the expression of c-fos mRNA and TIMP1 between the two groups,indicating that quercetin may have better effect on schistosomal liver fibrosis than praziquantel in the long term.

Bone marrow mesenchymal stem cells (BMSCs) is a kind of multipotent adult stem cells,which is one of the most important seed sources of tissue engineering.Microgravity has inhibitory effects on osteogenic differentiation of BMSCs,which will cause bone mass reduction and changes of bone micro-structure that finally lead to osteoporosis.This process is regulated by multiple signaling pathways such as mitogen-activated protein kinase (MAPK) pathway,Notch pathway and Wnt/β-catenin pathway which co-regulated BMSCs osteogenic differentiation under microgravity.Studying the effects of microgravity on BMSCs into osteogenic differentiation can clarify the mechanism of bone loss,put forward new targets for the treatment of diseases and provide a useful reference for the development of China's space industry.

Objective To investigate the brain magnetic resonance imaging (MRI) features and clinical manifesta-tions of the patients with citrullinemia, and to promote awareness of, early diagnosis of and better treatment for the disease.Methods One case with citrullinemia was reported, and other eight cases reported in the literature in nearly 14 years were reviewed.Results The case was a 15-month-old girl with type I citrullinemia diagnosed by the mutation analysis of the ASS1 gene performed in local hospital after birth. The patient was admitted to our hospital for recurrent lethargy for a year and the high level of blood ammonia (311 μmol/L, normal range 9-33 μmol/L). The blood ammonia reduced to normal on the 11th day after arginine treatment. On MRI scans, the diffusion weighted imaging (DWI) showed diffuse hyperintensity on bilateral frontal, parietal and temporal cortex, which indicated restricted diffusion due to cytotoxic edema. On the follow-up MRI after 10 day's treatment, the affected regions was similar but the intensity decreased compared to the previous scan,which accompanied by cere-bral atrophy. Eight cases in the literature were reviewed, and the clinical manifestations in these patients were lack of speciifcity, the most common features included feeding dififculties, lethargy, and vomiting. Brain MRI was performed on 7 cases, computed tomography (CT) was performed on 1 case, with the result of cytotoxic edema in 3 cases and atrophy in 2 cases.Conclusions Citrullinemia often lacks of speciifc symptoms in the early phase. Brain MRI could provide the clinician a valuable help for early diagnosis and treatment of this disease.

Objective To evaluate the length of hospital stay and the incidences of complications after omentoplasty with non-omentoplasty for the patients with esophageal cancer.Methods The databases including Pubmed,Embase,The Cochrane Library,Web of Science,CBM,CNKI,VIP and Wanfang data were searched for collecting randomized controlled trials on the omentoplasty.According to the inclusive and exclusive criteria,the datas were extracted.Two reviewers independently screened literatures and assessed the qualities of the included studies and extracted data.Meta-analysis was performed by using of RevMan 5.2 software.Results A total of 6 RCTs including 2 167 patients from 206 original articles were included in this analysis.In terms of the anastomotic leakage after esophagectomy and the hospital stays,the incidence of anastomotic leakage (OR =0.19,95％ CI:0.09 ～ 0.39,Z =4.55,P ＜ 0.000 01) and hospital stays (MD =-1.91,95％ CI:-2.26--1.57,Z =10.87,P ＜ 0.000 01) with omentoplasty was significantly lower than those of the non-omentoplasty,with significant differences.However,in terms of anastomotic stricture (OR =0.76,95％ CI:0.29-2.01,Z=0.55,P=0.58) and mortality rate (OR =0.72,95％ CI:0.24-2.21,Z=0.57,P=0.57),there wrer no significant differences.Conclusion Comparing with non-omentoplasty,the use of omentoplasty has beneficial effects for the postoperative complication such as anastomotic leakage and hospital stays,and does not increase the incidence of anastomotic stricture and mortality rate.

OBJECTIVE:To optimize kind of safe and effective iodophor thinner.METHODS:Iodophor solutions in several different solvents were made and diluted 5,10 and 20 times,respectively.Then their microbicidal potentials on 3 standard strains were monitored.RESULTS:The standard strains were all killed within 5 min by iodophor solution in normal sodium or by low multiple diluted iodophor solution in distilled water;however,there were a few Escherichia coli and Pseudomonas aeruginosa still alive within 5 min in high multiple diluted iodophor solution in distilled water.Iodophor solution in tap water failed to kill all the standard strains,especially the Pseudomonas aeruginosa.CONCLUSION:Normal saline solution and distilled water have been proved to be the ideal iodophor thinners.

A visible light-curing calcium hydroxide cement is presented here and the effects of its resin matrix on the Ca2+ releasing, compressive strength of set material and the pH value of water in which set materials immersed are evaluated. Experimental results show that the effects of the selected resin matrix on Ca2+ releasing, compressive strength and pH value are significant. The calcium hydroxide cement containing BEMA or EMA and HEMA as resin matrix has good properties. The pulp capping test showed that an excellent dentin bridge appeared in dogs capped teeth at 70 days. pulp, pulp capping, calcium hydroxide, visible light-curing, dental materials
Animals ; Calcium ; metabolism ; Calcium Hydroxide ; radiation effects ; therapeutic use ; Composite Resins ; chemistry ; radiation effects ; therapeutic use ; Dental Cements ; therapeutic use ; Dental Pulp Capping ; instrumentation ; Dental Pulp Exposure ; therapy ; Dogs ; Light ; Time Factors