Objective To investigate the effectiveness of the SF-36 health survey questionnaire used to investigate the quality of life (QOL) of the patients undergoing tibial bone transport.Methods Reliability analysis,correlation analysis and validity analysis were performed to evaluate the reliability and validity of the SF-36 scale.According to treatment time,94 patients who underwent tibial bone transport were divided into 3 groups:group A were 30 patients who had just started bone transport,group B 43 patients who had completed bone transport and removal of external fixation within 2 years,and group C 21 patients who had completed bone transport and removal of external fixation beyond 2 years.A mean comparison of items in the SF-36 scale was further carried out.Results The questionnaires were completed well.The Chonbach α indexes of all the items were more than 0.8,showing good reliability of the scale.Most of the correlation coefficients were almost or more than 0.5,indicating acceptable content validity of the scale.The QOL of the patients undergoing tibial bone transport was differentiated from that of normal people,proving good discriminant validity of the scale.Groups B and C obtained significantly better scores in all items of the scale than group A (P ＜ O.05).Group C scored significantly higher in physical functioning (PF) and role-emotional (RE) than group B (P ＜ 0.05),but there were no significant differences between the 2 groups regarding other items of the scale (P ＞ 0.05).Conclusions With good reliability and validity,the SF-36 health survey questionnaire can be used to assess the QOL of the patients undergoing tibial bone transport.The treatment of bone transport in the tibia can significantly and durably help improve the QOL of the patients.

Objective:To investigate the effect of actin related protein 2/3 complex subunit 2 (ARPC2) gene silencing on the biological characteristics of papillary thyroid carcinoma (PTC) TPC-1 cells through lentivirus-mediated RNA interference.Methods:TPC-1 cells infected with nonsense short hairpin RNA (shRNA) sequence lentivirus (shCtrl) was used as the control group. TPC-1 cells infected with ARPC2 shRNA interference sequence lentivirus (shARPC2) was used as the experimental group, in which the expression of ARPC2 gene was specifically interfered. The effects of silencing the expression of ARPC2 gene on the proliferation of TPC-1 cells were detected by using methyl thiazolyl tetrazolium (MTT) assay, flow cytometry, Western blot and colony formation test. Flow cytometry and Western blot were conducted to detect the effect of silencing ARPC2 gene on TPC-1 cells apoptosis and related proteins.Results:shARPC2 could efficiently infect TPC-1 cells, and the expression efficiency of green fluorescent protein was over 85%. Compared with the control group, TPC-1 proliferation was inhibited in the experimental group. The ratio of S-phase cells in the experimental group was reduced compared with that in the control group [(14.79±0.21)% vs. (21.13±0.33)%, t = 27.77, P < 0.05]. The ratio of G 1 and G 2/M-phase cells in the experimental group was increased compared with that in the control group [G 1 phase: (67.57±0.08)% vs. (62.06±0.36)%, t=25.56, P < 0.05; G 2/M phase: (17.64±0.12)% vs. (16.91±0.17)%, t=6.154, P < 0.05]. Meanwhile, the expressions of cell cycle-related proteins CDK2, CyclinE and CyclinD were reduced in the experimental group. The number of clone formation in the experimental group was less than that in the control group, the difference was statistically significant [(10±2) vs. (161±6), t=9.011, P < 0.05]. In addition, the apoptotic ratio of cells in the experimental group was higher than that in the control group [(8.60±0.77)% vs. (4.08±0.40)%, t=9.011, P < 0.05]. Western blot showed that the expressions of anti-apoptotic factors p21 and bcl-2 were reduced in the experimental group, while the expression of pro-apoptotic factor bax was increased. Conclusion:The interference with the expression of ARPC2 regulated by shRNA can inhibit the proliferation, and promote the apoptosis of PTC TPC-1 cells, indicating that ARPC2 may be a possible biological new target for the treatment of PTC.

Objective To preliminarily investigate the anti-tumor effects of phytosphingosine(PHS)and the involvement of inducing apoptosis of leukemia cells.Methods Cellular model of leukemia was established in leukemia cell lines K562 and SUP-B15.CCK-8 assay and EdU assay were used to measure the viability and DNA synthesis of K562 and SUP-B15 cells.RNA-seq was carried out to verify the differentially expressed genes(DEGs)after PHS treatment.Gene Ontology(GO)enrichment and Kyoto Encyclopedia of Genes and Genomes(KEGG)enrichment analyses were applied to analyze the involved functions and signaling pathways.Comparative Toxicogenomics Database(CTD)and Discovery Studio software were employed to predict the underlying targets of PHS and molecular docking.Cell apoptosis was detected by flow cytometry,mitochondrial membrane potential was evaluated by JC-1 probe,and protein expression of key molecules was validated by Western blotting.Results PHS inhibited the proliferation of K562 and SUP-B15 cells in a time-and dose-dependent manner.The half-maximal inhibitory concentration(IC50)of K562 cells was 17.67 and 12.52 pmol/L for 24 and 48 h,respectively,and the IC50 value of SUP-B15 cells was 17.58 and 14.86 μmol/L for 24 and 48 h,respectively.PHS treatment at a dose of 20 μmol/L for 48 h resulted in significant inhibition of DNA synthesis.GO enrichment analysis of the K562 cells showed that PHS might be involved in positive regulation of apoptotic process,plasma membrane and its integral components,and protein kinase binding and activity.Reverse predictive analysis showed that BCL-2 protein was the most likely target of PHS.PHS significantly increased the apoptotic rate of leukemia cells(P＜0.05)in a dose-dependent manner,reduced the mitochondrial membrane potential,and down-regulated BCL-2 level(P＜0.05)and up-regulated the levels of Cleaved caspase-3 and Cleaved caspase-9(P＜0.05).Conclusion PHS may inhibit the proliferation of leukemia cells by inducing mitochondria-dependent apoptosis,possibly through PHS and BCL-2 interaction.

Objective This study was conducted to evaluate treatment-related toxicities,the patterns of failure,overall survival(OS)and progression-free survival(PFS)by comparing IFI with ENI in combination with chemotherapy. Methods Eligible patients were treated with concurrent chemoradiotherapy and randomized into either an IFI or ENI arm. The primary end points wereacute treatment-related toxicities. The secondary end points were patterns of failure,OS and PFS. Kaplan?Meier survival rate of the method for calculating the Logrank test difference method. Results Between April 2012 and October 2016,a total of 228 patients were enrolled from nine centers in china. Grade≥3,Grade≥2 radiation esophagitis and pneumonitis in the IFI arm were significantly lower than that of the ENI arm(P=0.018,0.027).No significant differences were observed in overall failure rates,loco-regional failure,distant failure rates,in-field and out-field lymph node failure between the two arms(P=0.401,0.561,0.510,0.561,0.681).The 1-,2-, 3-,4-yearand median OS in the ENI arm and IFI arm were 84.1%,57.3%,39.4%,31.6%,28 months and 83.6%,62.1%,44.5%,31.5%,32 months(P=0.654),respectively. The 1-,2-,3-yearand median PFS in the ENI arm and IFI arm were 71.9%,42.3%,32.7%,20 months and 70.1%,45.0%,35.9%,22 months (P=0.885),respectively. Conclusions Compared to ENI,IFI resulted in decreased radiation pneumonitis and esophagitis without sacrificing loco-regional lymph nodal control,PFS and OS in thoracic ESCC. Clinical Trial Registry Chinese Clinical trail registry,registration number:NCT01551589.

Objective:To explore the associations between perceived built environment attributes and adults’ leisure-time physical activity in four cities of China.Methods:Multistage cluster random sampling method was used to select adults aged 25 to 64 in Hangzhou, Suzhou, Chengdu, and Qingdao. Data were collected from June 2017 to July 2018. The perception of the urban built environment was assessed by the neighborhood environment walkability scale-abbreviated (NEWS-A), and the physical activity was assessed by the International Physical Activity Questionnaire. Generalized linear mixed models were used to explore the relationship between the perceived built environment and leisure-time physical activities.Results:A total of 3 789 participants were included in the analysis. After adjusting for potential confounders, better access to public services ( OR=1.34, 95% CI: 1.02-1.75) and higher aesthetic quality ( OR=1.37, 95% CI: 1.09-1.73) were positively associated with the possibility of engaging in leisure-time physical activity in the past week. Similarly, these two attributes were positively associated with leisure-time walking. Higher scores on the perception of street connectivity were positively associated with leisure-time walking [ exp( β)=1.09, 95% CI: 1.00-1.19]. Higher residential density [ exp( β)=1.000 4, 95% CI:1.000 0-1.000 8], better access to physical activity destinations[ exp( β)=1.09, 95% CI: 1.00-1.19], and better aesthetics [ exp( β)=1.11, 95% CI:1.00-1.22] were associated with higher leisure-time physical activity. Similarly, these three attributes were positively associated with the possibility of meeting the WHO recommendations. Conclusion:Changing some urban built environment attributes may increase leisure-time physical activity.

Objective: To investigate the radiotherapy (RT)-induced changes in the brain structural network in patients with nasopharyngeal carcinoma (NPC). Methods: Three-dimensional structural magnetic resonance data (3D-T1W) was adopted to investigate the structural network in 103 patients with NPC before and after receiving RT. The structural networks were then reconstructed using 3D-T1W. The radiation-induced changes in topology properties of small world network were analyzed by using graph theoretical analysis. Results: Patients showed small world properties before and after RT. Compared with the pre-RT group, the global and local efficiency were lower, the shortest path length was longer and the clustering coefficient was less in the post-RT group. In addition, the hub regions in the post-RT group were significantly different from those in the pre-RT group, mainly located in the left rolandic operculum, right inferior frontal gyrus, right parahippocampal gyrus, right lingual gyrus, bilateral supramarginal gyrus, left superior temporal gyrus and temporal pole of the right middle temporal gyrus. Conclusion It is speculated that RT leads to high efficiency of network topology and information transmission, which provides a novel perspective for exploring the RT-induced brain changes, diagnosis of RT-induced injury and evaluation of RT efficacy.