Objective To investigate the expression of miR-200b in lung cancer and its relationship with clinicopathological features of lung cancer.Methods The specimens of lung tumor tissue and adjacent normal lung tissue of 36 cases of lung cancer who received surgical treatment in our department were collected,and then quantitative real time PCR (qRT-PCR) was applied to determine the expression of miR-200b in lung cancer tissue and adjacent normal lung tissue.Results The expression of miR-200b in lung cancer was significantly lower than adjacent normal lung tissue (P =0.000),and in small cell lung cancer was also significantly lower than adenocarcinoma and squamous cell carcinoma (0.13 ± 0.09 vs.0.64 ± 0.33,0.75 ± 0.30) (P =0.005 and P =0.001).The expression of miR-200b in patients with positive lymph nodes,advanced stage of lung cancer and in smokers were significantly lower than those with negative lymph nodes,early stage of lung cancer and in non-smokers,respectively (0.52 ± 0.29 vs.0.87 ± 0.35,0.46 ±0.25 vs.0.90 ±0.32,0.52 ±0.27 vs.0.90 ±0.39) (P =0.004,P =0.000 and P =0.015).Conclusions Low expression of miR-200b may participate in the occurrence and progression of lung cancer,especially in small cell lung cancer,and correlates with the metastasis of lung cancer.The down-regulated expression of miR-200b may be induced by smoking.Thus,miR-200b perhaps is a new target for the treatment of lung cancer.

Objective To investigate the expression and clinical significance of serum ferritin in patients with lung cancer. Methods The relationship between preoperative serum ferritin level and corre-sponding clinicopathological data in 174 patients with lung cancer and 85 patients with benign pulmonary diseases was reviewed and analyzed. Results The level of serum ferritin in patients with lung cancer was significantly higher than that in patients with benign pulmonary diseases. For non-small cell lung cancer, patients with large-sized,poorly differentiated squamous carcinoma in advanced stage had higher serum ferritin levels than those with small-sized,highly or moderately differentiated adenocarcinoma in early stage. Conclusion Serum ferritin may play a promoting role in the development and malignant progres-sion of lung cancer.

Non-small cell lung cancer(NSCLC)is a prevalent tumour type in our country,with lung squamous car-cinoma being a commonly observed NSCLC subtype besides lung adenocarcinoma.Epidermal growth factor receptor(EGFR)is a significant driver gene in lung cancer,and EGFR mutation frequency is considerably lower in lung squamous carcinoma in comparison to lung adenocarcinoma.Although targeted therapy against EGFR has demonstrated significant advancements in lung adenocarcinoma,while progress in lung squamous carcinoma has been relatively sluggish.This paper reviews recent stud-ies on molecular targeted therapy for EGFR-mutated lung squamous carcinoma and summarises the efficacy of EGFR-tyrosine kinase inhibitors(TKIs)in treating squamous carcinoma of the lung,in order to provide a reference for treating patients with EGFR-mutated squamous carcinoma of the lung.

Background and objective Despite undergoing curative resection, the 5-year survival rate for stage III non-small cell lung cancer (NSCLC) patients is less than 25%. hTere is a need for biomarkers for prediction of survival and guiding individual therapy. MiR-155 is one of most commonly upregulated miRNAs in malignancies, and regulates multiple pro-oncogenic pathways. We aimed to investigate the prognostic impact of miR-155 in resected stage III NSCLC patients. Methods Tumor formalin-ifxed, paraffn-embedded (FFPE) from 162 resected stage III NSCLC patients were collected. Total RNA including miRNA was extracted, and qRT-PCR was used to determine the expression of miR-155. Results Spearman rank correlation test showed a positive correlation between miR-155 expression and nodal status (r=0.169, P=0.032). MiR-155 expression had a signiifcant prognostic impact in the total cohort (P<0.001), in squamous cell carcinomas (P=0.002) and in adenocarcinomas (P=0.003). In N0-1 subgroup, miR-155 expression did not have a signiifcant prognostic on overall survival in univariate analysis (P=0.319). In N2 subgroup, miR-155 had a negative prognostic effect on OS in univariate analysis (P<0.001). Cox regression analysis revealed that miR-155 expression was unfavorable prognostic factors of OS (RR=2.311, 95%CI:1.479-3.611, P<0.001). Conclusion High expression of miR-155 represents a valuable marker of poor clinical outcomes in patients with stage III NSCLC.

Objective To explore the effect of core self-evaluation on turnover intention of clinical specialized nurses and provide reference for nursing administrators.Methods A total of 220 nurses from Ji'nan City,Shandong Province were selected to conduct a questionnaire survey from April to June 2016. The general nurses' general questionnaire,core self-evaluation scale and turnover intention scale were used to investigate. Results The total score of core self-evaluation of clinical specialized nurses was (36.42±5.86),and the total score of nurse's turnover intention was (15.66±3.48). Age,job title,education background and core self-evaluation had predictions of turnover intention for the nurses.Conclusions Nursing managers should take measures to improve the core self-evaluation of specialist nurses in order to reduce their turnover rate and stabilize the nursing team.

The incidence and mortality of esophageal cancer are high, with strong invasiveness and poor prognosis. In China, the number of morbidity and death accounts for about half of the world. The cause of the disease has not yet been clarified, and it is known to be related to many factors such as chronic damage to the upper digestive tract caused by poor diet and lifestyle, heredity and environment. With the continuous advancement of molecular biology technology, metagenomics and high-throughput sequencing began to be used as non-culture methods instead of traditional culture methods for micro-ecological analysis, and is becoming a research hotspot. Many studies have shown that the disturbance of upper digestive tract microecology may be one of the causes of esophageal cancer, which affects the occurrence and development of esophageal cancer through complex interactions with the body and various mechanisms. This paper reviews the research progress, which is of great significance to further clarify the value of upper gastrointestinal microecology in the pathogenesis, diagnosis and treatment of esophageal cancer.

Chimeric antigen receptor T cell (CAR-T) therapy has shown remarkable success in treating hematological malignancies. However, CAR-T therapy for solid tumors is still limited due to the unique solid-tumor microenvironment and heterogeneous target antigen expression, which leads to an urgent need of combining other therapies. At present, nano delivery system has become one of the most promising directions for the development of anti-tumor drugs. Based on the background of CAR-T and tumor treatment, we focus on the research progress of nanomedicine combined with CAR-T therapy, and systematically review the strategies and examples in recent years in the aspects of in vivo delivery of mRNA, regulation of tumor microenvironment, combination with photothermal therapy. And we also look forward to the future direction of this filed.
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Humans ; Receptors, Chimeric Antigen/therapeutic use* ; Pharmaceutical Preparations/metabolism* ; Antigens, Neoplasm/metabolism* ; Lung Neoplasms/metabolism* ; Neoplasms/metabolism* ; T-Lymphocytes ; Tumor Microenvironment ; Nanoparticles/therapeutic use*

Objective:To investigate the relationship between MRI parameters and clinical prognosis before and after chemoradiotherapy in patients with locally advanced rectal cancer.Methods:Clinical and follow-up data of 96 patients with locally advanced rectal cancer who were initially treated in the Cancer Hospital of Chinese Academy of Medical Sciences from 2015 to 2017 were retrospectively analyzed. All patients received preoperative chemoradiotherapy, followed by delayed radical surgery at 6-13 weeks after radiotherapy. MRI assessment was performed twice around radiotherapy which were within 4 weeks before the treatment and 4-8 weeks after it. Correlation analysis was utilized to determine the association between MRI assessment and 3-year disease-free survival (DFS).Results:Of the all patients, 80 (83%) had T 3 stage, 16(17%) had T 4 stage, 14 (15%) had N 0 stage, and 82 (86%) had N 1-2 stage. Among them, 69(72%) and 58(60%) patients were positive for MRF and EMVI. The median dose of radiotherapy was 50 Gy, and all patients were sensitized by simultaneous capecitabine. After chemoradiotherapy, T-downstage rate of the whole group was 24%, and 50% for the N-downstage rate. The MRF-and EMVI-positive rates were significantly decreased to 37% and 27% after chemoradiotherapy (both P<0.001). Univariate and multivariate analyses showed that N staging and EMVI status change were significantly correlated with the 3-year DFS. Conclusion:MRI after concurrent chemoradiotherapy reveals that positive EMVI throughout the treatment and N 1-N 2 staing are poor prognostic factors of DFS, suggesting the need for improving the treatment.

Objective    To analyze the effect of microecological preparation on digestive tract complications and nutritional status after esophageal cancer surgery. Methods    A total of 146 patients with esophageal cancer admitted to the Department of Thoracic Surgery, Renmin Hospital of Wuhan University from October 2017 to June 2019 were selected. There were 91 males and 55 females, aged 65 (61.9±8.2) years. They were randomly divided into two groups (an observation group and a control group, n=73 in each group) according to whether microecological preparation was given when they could take food one week after the surgery. Nutritional status and the incidence of gastrointestinal complications including anorexia, acid reflux, nausea, vomiting and diarrhea (≥3 times per day) in the first month after operation were compared between the two groups. Results    The incidence of anorexia, nausea, diarrhea (≥3 times per day), anastomotic fistula and stenosis in the observation group was lower and the index of nutritional status was higher than those in the control group within one month after the operation (all P<0.05). There was no statistically significant difference in acid reflux, vomiting, lung infection and incision infection between the two groups (all P>0.05). Conclusion    Microecological preparation can regulate gastrointestinal microecological balance, improve nutritional status, reduce the incidence of gastrointestinal complications and accelerate the postoperative rehabilitation.

Objective:This study comprehensively analyzed the genomic characterizations of human parainfluenza virus type 3 (HPIV3) strains circulating in six provinces and cities of China (Beijing, Henan, Jilin, Anhui, Gansu, and Shandong) during the period of 2019-2020. The aim was to elucidate the intricate genetic variations and molecular evolutionary trends within the HPIV3 genome.Methods:Based on genotypic differentiation, genetic divergence, and spatial and temporal distribution, 12 representative HPIV3 strains (including 7 of C3a subtype, 2 of C3b subtype and 3 of C3f subtype) were selected from the aforementioned provinces, and the complete genome sequence was successfully obtained by overlapping amplification of fragments using nested RT-PCR. Subsequently, a complete genome database of global representative HPIV3 strains was constructed and analyzed using bioinformatics tools.Results:The length of complete genome of the 12 HPIV3 strains in the present study varied between 15 227 bp and 15 370 bp, the G+ C content ranged from 35.1% to 35.3% and the nucleotide identity intermediated from 97.6% to 99.6%. Compared with the prototype strain (GenBank accession number: NC_001796.2), the nucleotide identity of 12 HPIV3 strains ranged from 94.2% to 94.5%. Analysis of the complete genome of HPIV3 available in China and globally showed that the genomic variation of HPIV3 was mainly shaped by substitution mutations, and no base deletions or gene recombination were observed.Only a six-base insertion (ATTAAA) was found in the F gene’s 3′UTR region of a representative strain originating from Jilin province (CHN/Jilin036/2019/C3b) in this study, and its potential pathogenic significance needs to be further investigated. Amino acid analysis of the encoded proteins revealed that the C3a lineage of HPIV3, widely prevalent both in China and worldwide, exhibits lineage-specific mutation sites in the N, P and L proteins. Furthermore, within the Chinese prevalent C3a strains, a distinctive mutation site (N216S) in L protein was also identified. Notably, specific variant sites have not been found in Chinese C3b and C3f branch strains. Based on the complete genome, the comprehensive evolutionary analysis showed that the time to the most recent common ancestor (tMRCA) of global HPIV3 strains was estimated to 1927 (95% HPD: 1901-1945), with an average molecular evolutionary rate of 5.29 × 10 -4 substitutions/site/year, while the average molecular evolutionary rate of HPIV3 strains in China is 5.24 × 10 -4 substitutions/site/year. In addition, each gene of HPIV3 was subjected to negative selection pressure, with the P, HN and F genes showing the most significant nucleotide variation and higher rates of molecular evolution than the other genes. Conclusions:This study reveals that the complete genome of HPIV3 strains circulating in six provinces and cities of China tend to evolve conservatively. Moreover, substitution emerge as the main driving force for molecular evolution of HPIV3.