[Analysis on the consciousness of the early cancer treatment and its influencing factors among urban residents in China from 2015 to 2017]

Objective: To understand the consciousness of the cancer early treatment and its demographic and socioeconomic factors. Methods: A cross-sectional survey was conducted in 16 provinces covered by the Cancer Screening Program in Urban China (CanSPUC) from 2015 to 2017. A total of 32 257 local residents aged ≥18 years old who could understand the investigation procedure were included in the study by using the cluster sampling method and convenient sampling method. All local residents were categorized into four groups, which contained 15 524 community residents, 8 016 cancer risk assessment/screening population, 2 289 cancer patients and 6 428 occupational population, respectively. The questionnaire collected personal information, the consciousness of the cancer early treatment and relevant factors. The Chi square test was used to compare the difference between the consciousness of the cancer early treatment and relevant factors among the four groups. The logistic regression model was used to analyze the influencing factors related to the consciousness of the cancer early treatment. Results: With the assumption of being diagnosed as precancer or cancer, 89.97% of community residents, 91.84% of cancer risk assessment/screening population, 93.00% of cancer patients and 91.52% of occupational population would accept active treatments (P<0.001). If the immediate family members were diagnosed as precancer or cancer, people who would encourage their family members to receive early treatment in the four groups accounted for 91.96%, 91.94%, 92.44% and 91.55%, respectively (P<0.001). The company employees, annual household income with 40 000 yuan and more and other three groups had a relatively better consciousness of the cancer early treatment (P<0.05). Male, widowed, unemployed and from the central and western regions had a relatively worse consciousness of the cancer early treatment (P<0.05). Conclusion: Residents in urban China participants had a good consciousness of the cancer early treatment. The marital status, occupation, annual household income and residential regions were major factors related to the consciousness of the cancer early treatment.

LncRNA TTN-AS1 contributes to gastric cancer progression by acting as a competing endogenous RNA of miR-376b-3p

Long noncoding RNAs (lncRNAs) were reported to participate in the progression of gastric cancer (GC). However, litter is known about the biological functions of TTN antisense RNA 1 (TTN-AS1) in GC. Using qRT-PCR examination, we found that TTN-AS1 was expressed at a higher level in GC tissues and cell lines compared to the normal controls. Kaplan-Meier analysis of GC patients revealed the negative correlation between TTN-AS1 expression and the overall survival. To detect the biological function of TTN-AS1 in GC, we silenced TTN-AS1 to perform loss-of-function assays. The experimental results revealed that knockdown of TTN-AS1 obviously inhibited GC cell proliferation, induced cell apoptosis and impaired cell migration and invasion. In mechanism, TTN-AS1 was located in the cytoplasm of GC cells, indicating the post-transcriptional regulation of TTN-AS1 on gene expression. Bioinformatics analysis revealed the potential binding relation between TTN-AS1 and miR-376b-3p as well as between miR-376b-3p and KLF12. Mechanism experiments such as luciferase reporter assay and RNA pull-down assay demonstrated the interaction between TTN-AS1 and miR-376b-3p as well as between miR-376b-3p and KLF12 in GC cells. At last, rescue assays certified that miR-376b-3p and KLF12 involved in TTN-AS1-mediated GC progression. Similarly, the role of TTN-AS1-miR-376b-3p-KLF12 axis in GC progression was analyzed and validated. Taken together, we concluded that TTN-AS1 might function as a novel potential therapeutic target in the treatment of gastric cancer.

[Analyses on the difference and trend of lung cancer incidence in Beijing, 2000-2012]

Objective: To analyze the temporal trends of lung cancer incidence between age, gender (male and female) and areas (urban and rural) in Beijing during 2000-2012. Methods: The lung cancer cases were collected by Beijing cancer registry between 2000 and 2012. We calculated the incidence and world age-standardized incidence rates (ASR) which standardized by World Segi's population. Also, the average age and median age of lung cancer incidence were calculated. The annual percent changes (APC) for the whole period, for the gender ratio and for the area ratio were evaluated with Joinpoint analysis. Result: Totally, 81 378 new cases of lung cancer were diagnosed in 2000-2012 with the average incidence rate of 52.67/100 000. The incidence rate increased by 4.84% per year from 38.99/100 000 to 65.33/100 000, but the APC of ASR was 1.69% (P<0.001) . The ASR increased 0.54% (P=0.029) per year in urban from 29.71/100 000 to 30.55/100 000 and 3.93% (P<0.001) in rural areas from 24.02/100 000 to 35.79/100 000. The incidence ratio of urban to rural decreased from 1.24 to 0.85 (APC=-3.29%, P<0.001). The incidence ratio of male to female decreased from 1.84 to 1.69 (APC=-0.45%, P=0.019).The average age of lung cancer incidence of male and female increased from 66.27 and 66.00 to 68.97 and 69.11 (P<0.001), respectively. Conclusion: The incidence rate of lung cancer increased slightly in urban areas but increased significantly in rural areas during 2000-2012, the area ratio trend was declined. The average age of lung cancer occurrence gradually increased, but the temporal trends varied with age group. The gender ratio decreased from 2000 to 2012.

[An analysis of incidence trends and characteristics of soft tissue sarcoma in Beijing, 1999-2013]

Objective: To analyze the incidence trends and to describe the characteristics of soft tissue sarcoma (STS) among residents in Beijing from 1999 to 2013. Methods: Medical information of the cases diagnosed as STS(ICD10: C47&C49) from 1999 to 2013 in Beijing was extracted from the population-based database of Beijing Cancer Registry.Crude incidence rate, age-standardized incidence rates to Chinese population (ASRC)and the world population(ASRW) were calculated. The characteristics of the STS cases in different gender and age groups from urban and rural areas were respectively analyzed.The incidence trends and annual percentage changes (APC) during last 15 years were analyzed by using JoinPoint 3.4.3 software. Results: A total of 2 048 cases were diagnosed as STS during the study period and the incidence rate of STS was 1.15 per 100 000 person-years. The ASRC was 0.74 per 100 000 person-years and ASRW was 0.86 per 100 000 person-years, respectively. Except for the impact of changes in the age composition, the APC of ASRW from 1999 to 2013 was 3.95%. For males, the incidence rate was increased from 0.65 per 100 000 in 1999 to 1.51 per 100 000 in 2013, and the APC was 4.27% (P<0.05); For females, the incidence rate was increased from 0.61 per 100 000 in 1999 to 0.91 per 100 000 in 2013, and the APC was 3.38% (P<0.05). In urban area, the incidence rate increased from 1.14 per 100 000 in 2000 to 1.35 per 100 000 in 2013, and the APC was 2.70% (P=0.05); In rural area, the incidence rate increased from 0.57 per 100 000 in 2000 to 0.98 per 100 000 in 2013, and the APC was 4.66% (P=0.04). 85.89%cases were pathologically diagnosed.Among them, undifferentiated pleomorphic sarcoma was the most common subtype, which accounting for 19.22%, followed by liposarcoma (19.04%), malignantnerve sheath tumor (10.18%), fibrosarcoma (10.06%)and sarcoma without definite type(7.22%). Conclusions: The incidence rate of STS is still increasing, especially in the rural area of Beijing. The most common subtypes of STS in different age-groups were different. Further study is needed to explore the high risks of STS in the population with specific characteristics.