Objective:To investigate the expression and function of CD226 on NK s ubsets and its coexpression with other activation receptor and inhibition recept or on NK cells. Methods:The expression of CD226 on CD56 bright and CD56 dim NK subsets and coe xpress ion with CD16 and NKG2A in PBMC and MLC in the presence or absence of IL-2 or IL-15 were detected by double fluorescent staining and flow cytometry analysis. The level of IFN-? in the supernatants of PBMC culture and MLC treated with o r without IL-2 or IL-15 were evaluated by ELISA. 51Cr release assay w as employed to measure the specific lysis of NK cells killing target K562 cells. Results:CD226 was mainly expressed on CD56 dim NK subsets in PBMC. When s imulated by IL-2, CD226 expression was shifted to CD56 bright NK subsets, while IL-15 increased the subpopulation of NKG2A+CD226+double positive cell s. In MLC-generated NK cells, CD226 was mainly expressed on CD56 dim NK su bsets, and also shifted to CD56 bright NK subsets in the addition of IL-15 . Furt hermore, the percentage of CD16+CD226+和NKG2A+CD226+ subsets were increa sed when stimulated by IL-2 or IL-15. There was great increase in IFN-? lev el in the supernatants of PBMC culture in the presence of IL-2 or IL-15, but no difference in the supernatants of MLC treated with or without two cytokine s. Moreover, the cytotoxicity of NK cells in PBMC and MLC were greatly enhanced by IL-2 or IL-15. Conclusion:CD226 is mainly expressed on CD56 bright NK subsets in IL-2 or IL-1 5 activated NK cells, and is coexpressed with CD16 and NKG2A preferentiatly, whi ch maybe involve in the modulation of cytotoxicity of NK cells based on the balance of coexpressed activation and inhibition receptors. [

Objective To investigate the effects of Inula Britannica on myocardial caspase-3 and cytochrome c ( cyt c) following overtraining-induced acute myocardial injury in rats.Methods Forty-eight male Wistar rats weighing 200-220 g were randomly divided into 3 groups:group control (group C,n =8) ; group exhausting swim (group E,n =24) and group Inula Britannica (group IB,n =16).The animal model of overtraining-indnced acute myocardial injury was developed by exhausting swim.The animals were forced to swim until they were exhausted.The animals sank to the bottom and no righting reflex or escape response was elicited when they were taken out of water in groups E and IB.In group IB oral Inula Britannica 25 ml/kg was given 24 h and immediately before overtraining.Blood samples were taken from inferior vena cava immediately and at 6,24 h after overtraining in group E and at 6,24 h after overtraining in group IB for determination of serum cardiac troponin I (cTnI) concentration (by ELISA).The animals were sacrificed after blood sampling and myocardial specimens were obtained for microscopic examination and determination of caspase-3 and cyt c expression (by immuno-histochemistry).Results Overtraining significantly increased serum cTnI concentration and up-regulated myocardial caspase-3 and cyt c expression in group E as compared with group C.Oral Inula Britannica significantly attenuated overtraining-induced increase in serum cTnI concentration and myocardial caspase-3 and cyt c expression in group IB as compared with group E.Conclusion Inula Britannica can reduce overtraining-induced acute myocardial injury by down-regulating caspase-3 and cyt c expression.

Objective To summarize the experience and efficiency of coils in endovascular aortic repair.Methods From September 2008 to December 2013,48 patients received endovascular aortic repair in combination of coil embolization including abdominal aortic aneurysm in 32 patients, and aortic dissection in 16.Results Coils were successfully implanted in all cases.One patient with ruptured abdominal aortic aneurism (AAA) underwent emergency endovascular aortic repair and died of multiple organ failure the day after surgery.One patient died of pulmonary artery embolization 3 hours after TEVAR.44 patients were followed up ranging from 7 to 60 months.In AAA group, 25 patients received endovascular exclusion in combination with internal iliac artery embolization, four of them had claudication due to gluteal ischemia but without other severe complications.Post-operative CTA found endovascular thrombosis in aneurysm.In the aortic dissection group, one patient died of pulmonary infection.During the follow up, there was no AAA dissection, and AAA rupture.Post-operative CT confirmed thrombus in cavity.There were no scaffold and coil translocation and surrounding tissue injury.Conclusions Endovascular aortic repair in combination with coil embolization is a complementary treatment to aortic diseases.

Objective To explore the relationship between abnormal copy number of mitochondrial DNA (mtDNA) and prognosis of the patients in colorectal cancer (CRC).Methods A total of 60 cases of CRC and corresponding adjacent noncancerous tissue specimens were selected.Genomic DNA was extracted.The mitochondrial ND1 gene was detected by quantitative real-time polymerase chain reaction and β-actin was set as internal control.And then the copy number of mtDNA was caculated and analyzed by t-test.The prognosis of patients was determined by Kaplan-Meier survival analysis.Results The mean mtDNA copy number of CRC tissue was 108.60±20.11,while that of the corresponding adjacent noncancerous tissues was 153.68±25.72,the former was significantly lower than that of the latter (t=10.69,P＜0.01).The rate of low mtDNA copy number in case with positive lymph nodes metastasis was higher than that in cases with negative lymph nodes metastasis (x2 =4.022,P＜0.05),however there were no obvious correlation with gender,age,pathological type,TNM stage.The survival rate of high mtDNA copy number group was higher than that of low mtDNA copy number group,however there was no statistical significance (P＞ 0.05).Conclusions mtDNA copy number of CRC was significantly lower than that of the adjacent noncancerous tissues.However the change of copy number was not correlated to the prognosis.

The quantity of medical equipment in hospital rise quickly recent year. It provides the comprehensive support to the clinical service. The maintenance of medical equipment becomes more important than before. It is necessary to study on the orientation and function of clinical engineer in medical equipment maintenance system. Refer to three grade health care system, the community doctors which is called General practitioner, play an important role as the gatekeeper of health care system to triage and cost control. The paper suggests that hospital clinical engineer should play similar role as the gatekeeper of medical equipment maintenance system which composed by hospital clinical engineer, manufacture engineer and third party engineer. The hospital clinical engineer should be responsible of guard a pass of medical equipment maintenance quality and cost control. As the gatekeeper, hospital clinical engineer should take the responsibility of "General engineer" and pay more attention to safety and health of medical equipment. The responsibility description and future transition? development of clinical engineer as "General Engineer" is discussed. More attention should be recommended to the team building of hospital clinical engineer as "General Engineer".
Engineering ; Equipment Safety ; Equipment and Supplies, Hospital ; Humans ; Maintenance and Engineering, Hospital ; Safety Management ; organization & administration

Objective:To investigate the effect of AngioJet thrombectomy on proximal iliofemoral vein thrombosis after trauma.Methods:The clinical data of patients with proximal iliofemoral vein thrombosis treated with AngioJet thrombectomy were retrospectively analyzed at Vascular Surgery Department of our hospital in 2019.Results:A total of 76 patients were enrolled. After PMT 20 patients had grade Ⅲ thrombolysis clearance(26.3%), 41 patients (53.9%) had grade Ⅱ clearance, and 15 cases (19.7%) had grade Ⅰ clearance. Thirty four cases (44.7%) of grade Ⅲ were cleared after catheter aspiration or catheter thrombolysis, 35 cases (46.1%) of grade Ⅱ, 7 cases (9.2%) of grade Ⅰ were cleared, thrombus clearance rate increased significantly ( P<0.05). Cerebral hemorrhage occurred in 1 case (1.3%), and thrombosis recurred in 2 cases (2.6%). The patency rate was 91.8% at 3 months follow-up. Conclusions:AngioJet thrombectomy is a safe and effective method for treating post-traumatic proximal iliac femoral vein thrombosis. Intraoperative application of urokinase thrombolysis, catheter aspiration and catheter-directed thrombolysis can increase thrombus clearance effect.

Objective To investigate the correlation between the Controlling Nutritional Status(CONUT)score and wound repair of diabetic foot ulcer(DFU).Methods A total of 80 DFU pa-tients treated in the Hospital from November 20,2019 to November 20,2022 were randomly selected as the study objects and divided into non-wound repair group(n=47)and wound repair group(n=33)based on wound repair status.Wound repair and hospital stay were recorded;clinical character-istics and the CONUT score were compared between the wound repair group and the non-wound repair group;the influencing factors of DFU wound repair were analyzed by the multivariate Logistic regres-sion model.Results The hospital stay of patients in the non-wound repair group was 16.00(10.50 to 24.00)days,which was significantly shorter than 44.00(31.00 to 61.80)days of patients in the wound repair group(P＜0.05).The total cholesterol(TC),ankle-brachial index(ABI),the CO-NUT score,and malnutrition rate of patients in the non-wound repair group were significantly higher than those in the wound repair group(P＜0.05).The results of multivariate Logistic regression anal-ysis showed that the CONUT score,malnutrition,TC and ABI were the independent risk factors for wound repair of DFU(P＜0.05).Conclusion Malnutrition,ABI,TC and CONUT score in DFU patients can adversely affect wound repair,and the CONUT score can accurately predict the risk of wound repair in patients,serving as a reliable reference for clinicians in early assessment of DFU.

Objective·To further clarify the mechanism of podocyte damage by studying the expression of cartilage oligomeric matrix protein(COMP)in glomerular podocytes and its relationship with podocyte autophagy under high glucose environment.Methods·The gene expression dataset GSE104948 was downloaded from the GENE EXPRESSION OMNIBUS(GEO)database,and differentially expressed genes(DEGs)were obtained via GEO2R.The molecular functions and signaling pathways related to differential genes were summarized.The most correlated key genes(hub genes)were acquired by Weighted Gene Co-Expression Network Analysis(WGCNA)and the protein-protein interaction network(PPI)of DEGs was constructed with STRING database.The enrichment analysis was performed again.Conditionally immortalized mouse podocyte cells were cultured in vitro.After being fully differentiated,they were stimulated with high glucose,and the expressions of COMP,mammalian target of rapamycin(mTOR),microtubule-associated protein 1 light chain3(LC3)and other proteins in podocytes were detected by Western blotting.The shRNA constructed by lentiviral vector was further used to infect podocytes to inhibit the expression of COMP,and the stable cell strains were screened by puromycin.The expression of COMP,mTOR,and LC3 of stable strains were detected by Western blotting,in order to observe the effect of COMP on autophagy.Results·A total of 362 DEGs were filtered for subsequent analysis.Among these DEGs,284 genes were up-regulated and 78 genes were down-regulated.The results of Gene Onotology(GO)term analysis showed that DEGs in diabetic nephropathy(DN)were mainly enriched in cell surface receptor signaling pathway,receptor binding,etc.The main enriched Kyoto Encyclopedia of Genes and Genomes(KEGG)pathways included phosphatidylinositol 3-kinase(PI3K)/protein kinase B(PKB/AKT)signaling pathway,extracellular matrix(ECM)-receptor interaction,etc.Sixty-four hub genes were refined through the intersection of WGCNA and PPI hub genes,and the hub genes with significantly increased or decreased expression were sifted.The hub genes were annotated with KEGG again,and it was found that most of the hub genes were enriched in"ECM-receptor interaction"and"PI3K/AKT signaling pathway".The PI3K/AKT/mTOR signaling pathway is a classic autophagy pathway,and COMP was absolutely overexpressed(logFC>2)in the 64 hub genes,suggesting that it may affect autophagy through this pathway.Western blotting showed that compared with the mannitol control group and the low glucose group,the expression of COMP in podocytes was significantly increased under high glucose stimulation.Compared with the control group,the expression of LC3-Ⅱ in the high glucose group was significantly decreased,indicating that the autophagy initiation of podocytes was inhibited under the high glucose environment.Compared with the negative control,the expression of LC3-Ⅱ in renal podocytes of mice with knockdown of COMP was significantly increased,and the mTOR decreased with the decrease of the expression of COMP,indicating that inhibiting COMP contributed to the recovery of autophagy in podocytes.Conclusion·COMP is highly expressed in DN patients and highly enriched in ECM receptor and PI3K/AKT signaling pathway.Autophagy in mouse renal podocytes is inhibited under high glucose conditions,and the high expression of COMP induced by high glucose may be a key factor in autophagy inhibition.Inhibiting COMP helps to restore autophagy in mouse renal podocytes.

Objective To investigate the correlation between the Controlling Nutritional Status(CONUT)score and wound repair of diabetic foot ulcer(DFU).Methods A total of 80 DFU pa-tients treated in the Hospital from November 20,2019 to November 20,2022 were randomly selected as the study objects and divided into non-wound repair group(n=47)and wound repair group(n=33)based on wound repair status.Wound repair and hospital stay were recorded;clinical character-istics and the CONUT score were compared between the wound repair group and the non-wound repair group;the influencing factors of DFU wound repair were analyzed by the multivariate Logistic regres-sion model.Results The hospital stay of patients in the non-wound repair group was 16.00(10.50 to 24.00)days,which was significantly shorter than 44.00(31.00 to 61.80)days of patients in the wound repair group(P＜0.05).The total cholesterol(TC),ankle-brachial index(ABI),the CO-NUT score,and malnutrition rate of patients in the non-wound repair group were significantly higher than those in the wound repair group(P＜0.05).The results of multivariate Logistic regression anal-ysis showed that the CONUT score,malnutrition,TC and ABI were the independent risk factors for wound repair of DFU(P＜0.05).Conclusion Malnutrition,ABI,TC and CONUT score in DFU patients can adversely affect wound repair,and the CONUT score can accurately predict the risk of wound repair in patients,serving as a reliable reference for clinicians in early assessment of DFU.

Objective:To investigate the acceptance and attitude toward a novel fecal immunochemical test (FIT) in colorectal cancer screening among populations in China.Methods:From May 2018 to May 2019, 2 474 people aged 50-74 years were recruited from five provinces of China (Zhejiang, Anhui, Jiangsu, Hunan and Yunnan). The general demographic characteristics, acceptance of the new FIT technology and operational difficulties through the whole screening process were obtained through questionnaire survey. Multivariate logistic regression model was used to analyze the factors related to difficulties encountered in sampling stool, reading and uploading results.Results:The subjects were (60.0±6.4) years old, and female, high school of above educated, unemployed/retired/other, married and with medical insurance status of “new rural cooperative medical care (NRCMC)” accounted for 61.7% (1 526), 29.0%(718), 34.3% (849), 92.7% (2 293) and 31.3%(775), respectively. The population's acceptance of the FIT technology was 94.8%. In the process of FIT screening, the percentage of occurred difficulties in sampling stool, reading and uploading results were 33.1% (819), 46.4% (1 147) and 62.9% (1 557), respectively. The main difficulties were the uncertainty about whether the sampling operation was standard (28.0%), the inability to accurately judge the result displayed (32.5%) and the need for help without using a smartphone (44.2%). The results of multivariate logistic regression model analysis showed that people aged 65-74 years old and with medical insurance status of “NRCMC” were more likely to encounter difficulties in sampling, and those who were unemployed/retired/other and living with 3 or more family members were less likely to encounter difficulties in sampling. Those aged 65-74 years old, farmers or migrant workers, and those with “NRCMC” were more likely to encounter difficulties in readingresults, and those with 3 or more family members were less likely to encounter difficulties in reading result. Those with “NRCMC” were more likely to encounter difficulties in uploading results, and those with education level of high school or above, living with more than 3 family members were less likely to encounter difficulties in uploading results.Conclusion:The acceptance of the new FIT technology is relatively high among the subjects. Age, education level, occupation, number of family members living together and medical insurance status might be related to difficulties encountered in sampling stool, reading and uploading results, and it can be further strengthened in terms of the technology and characteristics of sub-populations.