Radiotherapy uses high-energy X-rays or other particles to destroy cancer cells and medical practitioners have used this approach extensively for cancer treatment (Hachadorian et al., 2020). However, it is accompanied by risks because it seriously harms normal cells while killing cancer cells. The side effects can lower cancer patients' quality of life and are very unpredictable due to individual differences (Bentzen, 2006). Therefore, it is essential to assess a patient's body damage after radiotherapy to formulate an individualized recovery treatment plan. Exhaled volatile organic compounds (VOCs) can be changed by radiotherapy and thus used for medical diagnosis (Vaks et al., 2012). During treatment, high-energy X-rays can induce apoptosis; meanwhile, cell membranes are damaged due to lipid peroxidation, converting unsaturated fatty acids into volatile metabolites (Losada-Barreiro and Bravo-Díaz, 2017). At the same time, radiotherapy oxidizes water, resulting in reactive oxygen species (ROS) that can increase the epithelial permeability of pulmonary alveoli, enabling the respiratory system to exhale volatile metabolites (Davidovich et al., 2013; Popa et al., 2020). These exhaled VOCs can be used to monitor body damage caused by radiotherapy.
Breath Tests/methods* ; Exhalation ; Humans ; Quality of Life ; Respiratory System/chemistry* ; Volatile Organic Compounds/analysis*

Objective: To investigate HPV vaccine hesitation and associated factors among female college students in Weifang, and to provide a suggestions for improving the coverage rate of HPV vaccine among female college students. Methods: The questionnaire of HPV vaccine hesitancy of female college students was designed. By adopting the stratified sampling method, the survey was conducted among female students at one medical university and three nonmedical universities in Weifang. Chi-square test and Logistic regression were used to analyze the influencing factors of vaccine hesitation. Results: Female college students who had high risk perception toward vaccine (OR=4.15, 95%CI=1.55-11.10) and those who were angry about the sideeffects of the vaccine (OR=3.63, 95%CI=1.95-6.75) were hesitate to vaccinate against HPV. Female college students who believed long protection period of HPV vaccine (OR=0.08, 95%CI=0.04-0.17), that women had a high probability of cervical cancer (OR=0.44, 95%CI=0.21-0.90) and that the knowledge of HPV vaccine scored >6 (OR=0.31, 95%CI=0.15-0.67) were more likely to receive HPV vaccine. Conclusion High risk perception of vaccines and anger at vaccine adverse reactions are important factors affecting HPV vaccines for female college students. Our findings call for strategic role of the state, school-based health education as well as medical professional guidance in lowering HPV vaccination hesitation among fenale college sutdents.

Nanomaterials usually refer to tiny particles with a diameter of 1-100 nm, which often have unique physicochemical properties and are one of the main areas of research interest for development of dental biomaterials. Nano-calcium phosphate modified dental materials have been widely used in pit and fissure sealing, dental resin restoration, tooth adhesion, and root canal sealing. The current research shows that the dental material modified by nano-calcium phosphate has stronger mechanical properties and shows long-term calcium and phosphorus ion release and excellent ion recharging ability, which can promote the remineralization of tooth hard tissue and has good prospects for application. However, it is difficult to accurately simulate the complex environment of the oral cavity. Therefore, the biocompatibility, cytotoxicity and effect of clinical application of nano-calcium phosphate modified dental materials still needs further study. This review summarizes and discusses the recent research progress regarding nano-calcium phosphate modified dental materials in the prevention and treatment of dental pulp diseases.

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.

Objective:To investigate the expressions of HIF-1α, BRD4, Beclin1, LC3B and p62 in breast cancer tissues and their clinicopathological significance, and to study alterations of their expression in breast cancer cells under hypoxic microenvironment.Methods:Immunohistochemistry was used to detect HIF-1α, BRD4, Beclin1, LC3B and p62 protein expressions in 125 breast cancer tissues and 50 para-cancer normal breast tissues, and their correlation with clinicopathologic characteristics were analyzed. The expression of these proteins were also measured after 24 hours of hypoxia stimulation was detected in different breast cancer cell lines and normal breast epithelial cells.Results:The expression of HIF-1α, BRD4, Beclin1 and LC3B proteins in breast cancer tissues were significantly higher than in para-cancer normal breast tissues ( P<0.05). There was a positive association between histologic grade, the expression of HIF-1α, BRD4, Beclin1 and LC3B ( P<0.05). High expressions of HIF-1a and Beclin1 were often correlated with lymph node metastasis and lymphatic invasion ( P<0.05). Increased HIF-1α, BRD4, Beclin1 and LC3B expression was associated with ER or PR negativity, but only HIF-1α was associated with HER2 positivity ( P<0.05). HIF-1α, BRD4, Beclin1, and LC3B were positively correlated with each other in breast cancer tissues ( P<0.01). After 24 hours of hypoxic stimulation, the expression of HIF-1α, BRD4, Beclin1 and LC3B was up-regulated in breast cancer cells. Conclusions:Hypoxia induces autophagy in breast cancer tissues. HIF-1α is positively correlated with BRD4, suggesting that BRD4 is involved in the regulation of autophagy by hypoxic microenvironment in breast cancer. High expression of HIF-1α, BRD4 and autophagy may play an important role in the development of breast cancer.

Objective To discuss the surgical treatment of intraductal papillary mucinous neoplasms of the pancreas (IPMN).Methods The clinical data of 42 IPMN cases undergoing surgical treatment in our hospital during the past 4 years were analyzed retrospectively.Results Routine CT or MRI examination was made in 42 cases,ERCP in 6 cases,ultrasonic endoscopy in 12 cases,fine needle biopsy by endoscopic ultrasonography in 4 cases.There were 12 cases of the main duct IPMN,24 cases of branch duct IPMN,6 cases of mixed IPMN.Pancreatoduodenectomy was performed in 24 cases;6 cases underuent laparoscopic central pancreatectomy;10 cases did distal pancreatectomy,2 cases did total pancreatectomy.Postoperative pathology revealed that the malignant transformation rate of main pancreatic duct type was 66.7％,that of BD-IPMN was 12.5％ and 66.7％ of Mix-IPMN.The postoperative complication rate was 26.2％.All cases were followed up for 1 month to 4 years,with no tumor recurrence.Conclusions Imaging examination combined with endoscopic ultrasonography is the main method for clinical diagnosis of IPMN.The malignant transformation rate of MD-IPMN and Mix-IPMN is high.Most of the BD-IPMN is hyperplasia and adenoma.

Objective: To discuss the clinical pathology characteristics, strategies of diagnosis and therapy, and related prognosis factors of pancreatic neuroendocrine tumors(pNET). Methods: Clinical data of 103 pNET cases in Department of Pancreatic Surgery, Changhai Hospital of Second Military Medical University were collected from January 2006 to December 2015. There were 44 males and 59 females, aged from 21 to 77 years with mean age of 48 years.Of the 103 patients, there were functional type in 21 cases and no functional type in 82 cases. Related factors on diagnosis and treatment were summarized. Moreover, univariate survival analysis was performed by Kaplan-Meier method, and COX proportional hazards model was used for multivariate survival analysis. Results: The detection rates of the B-ultrasound, CT, MRI were 60.2%, 84.6% and 91.3%, respectively, and there were 44 cases located in pancreatic head, 18 cases in pancreatic neck and 41 cases in pancreatic body and tail.G1 was the most common pathological grade, and the positive rates of Chromogranin A, Syn, neuron-specific enolase and CAM5.2 were 97.1%, 97.1%, 91.3% and 93.2%, respectively. The results of statistical analysis showed that tumor grade(χ²=26.077, P<0.05), Ki-67 index(χ²=25.427, P<0.05), ENETS stage(χ²=5.915, P<0.05), AJCC stage(χ²=8.411, P<0.05), lymph node metastasis(χ²=4.770, P<0.05) and distant metastasis(χ²=8.411, P<0.05) were associated with the prognosis of pNET, and the tumor grade was an independent risk factor of the pNET′ overall prognositic factors (HR=3.085, P<0.01). Conclusions The pNET can be located in any part of pancreas, and the combination of laboratory and various imaging examinations can help make early diagnosis. In addition, tumor grade, Ki-67 index, ENETS stage, AJCC stage, lymph node metastasis and distant metastasis were closely related to the prognosis of pNET, and the higher the tumor grade, the worse the prognosis.

OBJECTlVE To establish Tg(-6.3CYP3A65∶EGFP) transgenic zebrafish for quick, intuitive detection of heavy metals ( copper, cadmium and zinc) , dioxin-like PCBs ( PCB126) and other environmental pollutants. METHODS Tol2 transposon system was used to generate transgenic zebrafish lines Tg(-6.3CYP3A65∶EGFP) in which CYP3A65 promoter regualated labeled fluorescence. The effect of heavy mentals ( copper, cadmium and zinc ) and PCB126 on the relative amounts of CYP3A65 gene expression was determined by observing the change in fluorescence intensity. RESULTS The relative gene expression of CYP3A65 was significantly increased after 96 h exposure to copper 0.1 and 0.2μmol·L-1 , cadmium 0.35 and 0.7μmol·L-1 , zinc 1.5 and 3μmol·L-1 , and PCB126 2-32μmol·L-1 , respectively ( P<0.01) , but decreased after 96 h exposure to copper 0. 9 μmol·L-1 , cadmium 2. 7 and 5.4 μmol·L-1 , and zinc 24μmol·L-1 , respectively( P<0.01) . CYP3A65 gene expression was significantly increased after 168 h exposure to copper 0.1 and 0.2 μmol·L-1 , cadmium 0.35 and 0.7 μmol·L-1 , zinc 1.5 and 3 μmol·L-1, and PCB126 2-32 μmol·L-1, respectively(P<0.01), but decreased after 168 h exposure to copper 0.9 μmol·L-1, cadmium 2.7 and 5.4 μmol·L-1, and zinc 12 and 24 μmol·L-1( P<0.05) , in a concentration-dependent manner. CONCLUSlON The results suggest that zebrafish CYP3A65 gene expression and the CYP3A65 labeled fluorescence lines can be another candidate biomarker for detecting environmental pollutants.

Objective To examine the influence of systemic rehabilitation exercise on social functioning in chronic schizophrenic patients.Methods 60 qualified cases selected from chronic psychiatric inpatient department were randomly divided into two groups according to admission number (AD).30 cases in treatment group accepted hospitalized systemic rehabilitation exercise and 30 controls accepted ordinary treatment for 6 months.Social functio-ning evaluated with SSPI and PSP.Results The total score of SSPI(t=1.322,P=0.256) and PSP(t=1.563,P=0.362) were not significantly higher(P>0.05),The total score of SSPI [(37.44 ±4.33)points,t=2.719,P=0.001]and PSP[(72.14 ±6.86)points,t=3.985,P=0.000]total score in the treatment group were significantly higher than that in the control group(P<0.01).It were significantly higher in the treatment group than before the intervention.The total score of SSPI (t=0.385,P=0.763)and PSP(t=0.682,P=0.827) total score were not significantly higher in the control group(P>0.05).Conclusion Systemic rehabilitation training does influence on social functioning in chronic schizophrenic patients.

Objective 　To search the relative factors of cerebral damage, rebleeding, delayed cerebral ischaemia(DCI) and hydrocephalus after subarachnoid haemorrhage (SAH) by CT scans and clinical findings in acute phase. Methods　To analyse the relationship between cerebral damage after SAH and clinical findings: CT scans resulte, age, sex, blood pressure, hyponatraemia, therapeutic methods. Results　Cerebral damage were related to the pattern of distritution of SAH on brain CT and hyponatraemia. The high attack rate of rebleeding and DCI is related to presence of blood in the surface of brain, collection of blood in the ventricle, saccula aneurysms or cerebral arteriovenous malformation (AVM) (P＜0.01). Conclusions　To forecast of cerebral damage after SAH by study of CT scans showing and clinical findings have clincal significance. According to these findings, we may take some therapeutics to prevent the cerebral damage after SAH.