Radiotherapy is one of the major treatments for malignant tumors.About 70 ％ of cancer patients received radiotherapy.Because of its unique physical advantages and favorable efficacy,proton therapy technology as a new kind of radiotherapy on cancer is applied more frequently.This review will discuss preliminary application and research progress of proton therapy technology in gastrointestinal carcinoma.

Objective To discuss the influences of responsibility administration system by family doctors and nurses on knowledge management and treatment compliance of hypertension patients. Methods Two hunderd hypertension patients (≥40 years old) registered in a community of Shenzhen were selected and randomized into two groups with 100 cases in each group based on the digit random number table. According to the management requirement of Work Manual of Community Comprehensive Prevention and Treatment Project on Hypertension and Diabetes in Shenzhen, patients in the control group were classified for follow-up and management, while the patients in the experiment group signed protocol of family doctor service and were managed by family doctors and nurses in addition to the management by the control group. After 1 year intervention, the two groups were compared in changes of awareness rate of hypertension related knowledge, treatment compliance, blood pressure and BMI. Results The awareness rate of hypertension related knowledge, treatment compliance, blood pressure and BMI in the experiment group after intervention were statistically better than those before intervention (P<0.01). After intervention, those indexes of the experiment group were significantly better than those of the control group (P<0.01). Conclusion Responsibility administration system by family doctors and nurses can effectively improve the awareness rate of hypertension related knowledge and treatment compliance of hypertension patients , thus effectively control the blood pressure.

Objective:To investigate the corrosion fatigue strength of laser-welded specimens fabricated from commercially pure titanium (TA2) and titanium alloy(TC4). Methods:TA2 and TC4 were mechanically processed into a certain size and joined by laser welding. A fatigue testing machine was used to test tensile load and fatigue strength after soaked in synthetic saliva. The fatigue fracture surface was examined by scanning electron microscopy (SEM). Results: The fatigue strengths of the laser-welded test specimens showed no significant differences compared to specimens in air. SEM examination showed that there were no defects such as corrosion pits. Conclusion: There are no significant differences between either laser-welded metal in the corrosion fatigue strength for dry specimens and specimens in synthetic saliva.

OBJECTIVETo investigate the application of expanded distant skin flaps for the facial and cervical deformities.

METHODS96 patients with facial and cervical deformities who underwent reconstructive surgery with expanded distant skin flaps were retrospectively reviewed and followed up.

RESULTSGood results were achieved in 95 cases. Necrosis happened in the distal end of one flap. The patients were followed up for 1-8 years with good cosmetic results, such as well-matched flap texture and color.

CONCLUSIONThe expanded distant skin flap is suitable and reliable for facial and cervical deformities.

Adolescent ; Adult ; Child ; Child, Preschool ; Face ; abnormalities ; surgery ; Female ; Follow-Up Studies ; Humans ; Male ; Middle Aged ; Neck ; abnormalities ; surgery ; Retrospective Studies ; Skin Transplantation ; methods ; Surgical Flaps ; Young Adult

BACKGROUND:Orthodontic tooth movement is based on the periodontal tissue remodeling. In the exogenous factors accelerating orthodontic tooth movement, Chinese herbal medicine has become a research hotspot because of its wide resources, low cost, easy to extract, mild effect, smal toxic, less side effects and drug resistance. OBJECTIVE: To summarize the role of Chinese herbal medicine in the periodontal tissue remodeling during orthodontic tooth movement. METHODS:A computer-based retrieval of CNKI, Wanfang and PubMed databases was performed for articles related to Chinese herbal medicine for improving orthodontic tooth movement published before 2014. The keywords were “Chinese herbal medicine, orthodontic tooth movement, periodontal tissue remodeling” in Chinese and English, respectively. RESULTS AND CONCLUSION:Erigeron breviscapus, Salvia, teasel, Drynaria, baicalin, evening primrose oil as Chinese herbs are most widely used in the promotion of periodontal tissue remodeling, characterized as wide resources, low cost, easy to extract, mild effect, low toxicity, less drug resistance. In the clinical orthodontic treatment, it is hoped to accelerate orthodontic tooth movement and shorten the treatment time. Therefore, under the appropriate corrective force, Chinese herbs can be used properly to improve periodontal tissue repair and remodeling, which can improve the microcirculation of periodontal tissue, increase the local blood flow, promote bone formation and repress bone resorption.

Objective:To investigate the differences in the expression levels of miR-196a-5p and miR-105-5p in serum of patients with benign and malignant pulmonary nodules and their diagnostic value of malignant pulmonary nodules.Methods:The expression levels of miRNAs in cancer tissues of lung adenocarcinoma and lung squamous cell carcinoma and paracancerous tissues in The Cancer Genome Atlas (TCGA) database were analyzed, and the miRNAs with significantly different expression levels in cancer tissues and paracancerous tissues were selected as target miRNAs. A total of 72 patients with pulmonary nodules admitted to Weifang People′s Hospital of Shandong Province from June 2019 to July 2020 were selected. The expression levels of target miRNAs in serum of patients with pulmonary nodules were detected by qRT-PCR. Receiver operating characteristic (ROC) curve was used to compare the diagnostic value of target miRNAs with tumor markers Cyfra21-1, NSE and CEA in malignant pulmonary nodules.Results:After screening, the target miRNAs were identified as miR-196a-5p and miR-105-5p. Twenty-six patients in the benign pulmonary nodules group and 46 patients in the malignant pulmonary nodules group were included. The levels of serum miR-196a-5p [ M ( P25, P75)] in the benign and malignant nodules group were 0.63 (0.09, 2.15) and 1.93(0.93, 4.97) respectively, and the levels of miR-105-5p in the two groups were 2.03 (0.54, 7.95) and 10.65 (5.94, 18.39) respectively. Compared with the benign pulmonary nodules group, the levels of serum miR-196a-5p and miR-105-5p in the malignant pulmonary nodules group were increased, and there were statistically significant differences ( Z=-3.083, P=0.002; Z=-4.092, P<0.001). The levels of serum Cyfra21-1 in the benign and malignant pulmonary nodules group were 2.48 (1.84, 3.78) and 2.20 (1.47, 3.32) μg/L respectively, the levels of serum NSE in the two groups were 15.58 (12.45, 18.95) and 14.43 (12.07, 17.87) μg/L respectively, and the levels of serum CEA in the two groups were 1.16 (0.55, 2.11) and 1.17 (0.61, 1.68) μg/L respectively. There were no significant differences in serum Cyfra21-1, NSE and CEA between the benign and malignant pulmonary nodules group ( Z=-1.161, P=0.246; Z=-0.305, P=0.761; Z=-0.271, P=0.786). The area under the curve (AUC) of the combination of miR-196a-5p and miR-105-5p for the diagnosis of malignant pulmonary nodules was 0.762 (sensitivity 89.1%, specificity 61.5%), which was higher than the value of the combination of Cyfra21-1, NSE and CEA for the diagnosis of malignant pulmonary nodules (AUC=0.591, sensitivity 58.7%, specificity 64.5%). Conclusion:The combination of serum miR-196a-5p and miR-105-5p can assist in the diagnosis of malignant pulmonary nodules and has higher diagnostic value.

Objective:To investigate the change of nature killer T cell(NKT)and myeloid derived suppressor cells(MDSC) during the development of mouse lung tumor.Methods:Lung tumor mouse models were made by subcutaneous injection of Lewis lung tumor cells( LLC) ,peripheral blood leukocytes were extracted from mouse tail blood at different time points after LLC injection.NKT and MDSC were detected by flow cytometry after relative antibody staining.Results:With the increasing volume of lung tumor,the ratio of NKT cells decreased gradually,while the ratio of MDSC increased gradually in the peripheral blood of LLC-injected mice.Both NKT and MDSC showed significantly changes in LLC-injected mice compared with that of normal control mice.Conclusion:NKT and MDSC in LLC-injected mice show opposite changes during the development of lung tumor,so,they can be used as potential monitoring index for lung tumor development.

Objective:To explore the changes of number of CD4+ CD25 + foxp3 + regulatory T cells (Treg)and natural killer cells (NK)in the peripheral immune organs and tumor tissue of the murine models of lung cancer,and to clarify their effects on the development of lung cancer.Methods:The C57BL/6 mice were divided into Lewis lung carcinoma cells (LLC)injection group and normal control group.The mice in LLC injection group were injected with LLC subcutaneously in the armpit to establish the tumor models,while the mice in normal control group were injected with the same amount of saline.The number of CD4+ CD25 + T cells,CD4+ CD25 + foxp3 + Tregs in the spleen,lymph nodes and lung cancer tissues,and the number of NK cells in the spleen tissue were labeled by cell surface or intracellular antibody staining,and detected by flow cytometry.Results:The ratios of CD4+ CD25 + T cells to CD4+ T cells,foxp3+ cells to CD4+ CD25 + T cells,and the number of CD4+ CD25 + foxp3 + Treg in the spleen and lymph nodes of the mice in LLC injection group were increased significantly compared with normal control group (P <0.05 or P <0.01).Moreover,the ratios of CD4+ CD25 + T cells to CD4+ T cells and foxp3 + cells to CD4+ CD25 + T cells in the tumor tissue were significantly higher than those in the spleen and lymph nodes of the mice in LLC injection group.However,the ratio of NK cells in the spleen tissue of the mice in lung cancer group was significantly decreased compared with normal control group (P <0.05).Conclusion:The increase of ratio and the number of Treg cells and the decrease of ratio of NK cells in the main immune organs of lung cancer mice may promote the development of tumor and inhibit the immune response to cancer cells in vivo .

Heteroclitin D (H.D) was successfully isolated from Kadsurae Caulis by using flash chromatography and recrystallized by methanol, 10.2 mg of H.D was obtained from 4.86 g of crude extract, and the purity determined by HPLC was 99.4%. The structure was identified by UV, IR, MS, and NMR analysis. The fast, simple and efficient method can be applied to the preparation of reference substance of H. D.

Objective:To investigate the clinical and pathogenic characteristics of community acquired pyogenic liver abscess (PLA).Methods:The clinical data of 172 patients in First Affiliated Hospital of Soochow University with community acquired PLA from March 2013 to September 2018 were retrospectively collected, including clinical characteristics, distribution of the causative pathogens, treatment regimens and outcomes. Chi-square test was used for statistical analysis.Results:There were 158(91.9%) cases with fever, 69(40.1%) cases with abdominal pain among 172 PLA cases. One hundred and forty-three (83.1%) were solitary, and 141(82.0%) cases localized in right hepatic lobe. One hundred and six (61.6%) cases were PLA of cryptogenic origin. There were 156 cases underwent etiology detection, with the positive etiology detection of 99(63.5%) cases. Ninety-two (92.9%) cases were infected with a single strain, and seven (7.1%) cases were infected with mixed strains. A total of 115 strains of bacteria were isolated. The main strains included 71 (61.7%) Klebsiella pneumoniae (KP), 21 (18.3%) Escherichia coli (EC), among which 17 were extended spectrum β lactamase, and two carbapenem-resistant Enterobacteriaceae. Among the 61 KP-PLA patients, 42(68.9%) cases were diagnosed with diabetes, 16(26.2%) cases with biliary diseases, and one (1.6%) case with malignant tumor. Among the 15 EC-PLA patients, six cases were diagnosed with diabetes, nine cases with biliary diseases, and four cases with malignant tumors. There were statistically significant differences ( χ2=4.307, 4.784 and 8.536, respectively, all P<0.05). After admission, the patients were treated with antibiotics alone or combined with drainage. One-hundred and sixty-seven (97.1%) cases got improved. Conclusions:The clinical manifestations of PLA are atypical, and the dominant pathogens are KP and EC. The risk factors of PLA are diabetes mellitus, biliary diseases and malignant tumors.