Early and precision diagnosis of malignant tumors is crucial for reducing mortality rates.Conventional single-modality technique has certain limitations for imaging,while novel multimodal molecular imaging technologies(such as PET/CT and optical imaging)can integrate the advantages of multiple imaging methods.Through leveraging specific molecular probes,these technologies enable noninvasively,synchronously obtain multidimensional tumor characteristics,including anatomy,functional metabolism,molecular targets and microenvironment,significantly increasing the capability of accuracy of early detection and precise staging of tumors,hence driving the transformation of diagnosis and treatment of tumors toward precision and individualization,also their clinical translation.The progresses and challenges in researches of novel multimodal molecular imaging technologies for diagnosis and treatment of tumors and clinical transformation were reviewed in this article.

Early and precision diagnosis of malignant tumors is crucial for reducing mortality rates.Conventional single-modality technique has certain limitations for imaging,while novel multimodal molecular imaging technologies(such as PET/CT and optical imaging)can integrate the advantages of multiple imaging methods.Through leveraging specific molecular probes,these technologies enable noninvasively,synchronously obtain multidimensional tumor characteristics,including anatomy,functional metabolism,molecular targets and microenvironment,significantly increasing the capability of accuracy of early detection and precise staging of tumors,hence driving the transformation of diagnosis and treatment of tumors toward precision and individualization,also their clinical translation.The progresses and challenges in researches of novel multimodal molecular imaging technologies for diagnosis and treatment of tumors and clinical transformation were reviewed in this article.

Objective To explore the relationship between polyp features at first-time colonoscopy and the recurrence, and to analyze the risk factors of recurrence at different time points of follow-up. Methods The data of 614 patients undergoing colorectal polypectomy between May 2008 and May 2016 were retrospectively analyzed. Patients were classified into 3 groups according to the characteristics and polyp features at first-time colonoscopy. The risk factors influencing polyp recurrence at different time points during follow up were analyzed. Results Univariate analysis showed that age ≥70 years, polyp′s diameter ≥0.5 cm,the number of polyps >2 and distribution throughout colon were risk factors for recurrence. In multivariate models,the number of polyps at baseline was the only significant predictor for recurrence(OR=2.36,95%CI:1.06-5.25). All of 614 patients underwent 6-87 months surveillance colonoscopy. The total recurrence rate was 58.6%(360/614). During four different surveillance intervals including 6-24 months,>24-36 months, >36-48 months, and >48-87 months,the cumulative recurrence rate of high-risk group was 60.1%,65.7%,80.7%,and 83.8%,respectively,whereas,that of low-risk group was 22.7%,40.0%, 53.8%,and 65.4%, respectively. There was a significant difference between the two groups(P=0.00). Conclusion The number of initial colorectal polyps is useful for predicting the risk of polyp recurrence,and the rate of polyp recurrence during surveillance increases with the passage of time. The cumulative recurrence rate of high-risk group after polypectomy is significantly higher than that of low-risk group.

Objective To assess the role of health education in outcomes of diabetes mellitus among high-risk populations.Methods The community physicians who participated this investigation received standardized training,and 307 community residents at high risk of developing diabetes obtained three-month intense health education and nine-month follow-up study.Paired t-test,and Analysis of Variance were used for data analysis.Results After systematic health education,professional level of community physicians was improved.Cognitive level of health knowledge was also significantly improved (5.5 vs 12.6,t=-28.511,P＜0.05).In addition,health knowledge of variant age (F=4.036,P＜0.05),education level (F=15.27,P＜0.05) and occupation (F=9.80,P＜0.05) subgroups was significantly increased.In comparison with baselines,the scores of each age subgroups (F=0.204,P＞0.05) showed no significant differences,although scores of different education level (F=4.71,P＜0.05) and occupation (F=4.87,P＜0.05) subgroups were significantly different.The risk factors of diabetes were effectively controlled.Conclusions Health education should be the key to health management of diabetes,which plays important roles in improving cognitive level of health knowledge among populations at high risk of developing diabetes and reducing the incidence of this condition.

Objective To improve the arthroscopic posterior cruciate ligament (PCL) reconstruction using tibial Inlay technique. Methods The special arthroscopic device and related fixation technique were designed. Five cadaveric knees were used to simulate the process of arthroscopic posterior cruciate ligament reconstruction using tibial Inlay technique. The knees were cut open to observe whether the outlet of the tibial tunnel shape and location met the design requirements. Thirty normal MRI films were measured to identify tunnel angle and localizer angle. Results The inner outlet of tunnel was conical shape(14 mm×7 mm×15 mm) and the outer outlet was cylinder-shaped (a diameter of 7 mm). The tibial drill was designed into a split structure and could be assembled in vitro. According to the data obtained from MRI films, the angle between the plane of posterior cruciate ligament and horizontal place was 36°-47°, and the localizer was fixed at 50°.The achilles tendon was used as implant and the allogft bones were designed into conical shape to fit the inner outlet of tunnel. The other end of implant to the proximal tibia was fixed with button plate. All reconstruction operations were performed under arthroscopy. The outcomes of procedure were satisfactory. There were no vascular or peripheral nerve injuries in the cadaveric knees The tunnel position was accurate and the shape of tunnel had met the design requirements. Conclusion Our results imply that improved arthroscopic of posterior cruciate ligament using tibial Inlay technique is simple, accurate, rapid and stable fixation.

Objective To analyze and summarize the clinical characteristics and to evaluate the laboratory tests and therapeutic methods of pancreatic carcinoma,so as to improve the understanding pancreatic carcinoma.MethodsThree hundreds cases of pancreatic carcinoma were collected during 1995—2003 in PUMCH.Results ①The clinical systoms included weight loss(75.3%),abdominal pain(66.3%),anorexia(51.0%),jaundice(50.0%),abdominal distention(44.0%),back pain(18.0%),diarrhea(14.3%) and melena(7.7%).②The sensitivities of tumor markers to diagnose pancreatic cancer were 77.5% of CA19-9,66.0% of CA50,48.3% of CA242 and 29.7% of CEA.If CA19-9 combined with CA50,CA242 and CEA,its sensitivity was increased up to 86.0%.③The titer value of CA19-9 was significantly related with radical operation ratio(P

Objective To understand the dietetic habits,the knowledge level of nutrition and food hygiene,the understanding of the relationship between food and disease,and their sources of and the demands for nutrition and food hygiene in the residents of Tianjin.Method 1 206 subjects(605 male and 601 female) aged 18 to 69 yrs were selected by the stratified multi-stage random sampling and investigated with the questionnaire.Results of all the subjects,no one's diet was consistent with the Chinese balanced diet guideline.Most subjects had some knowledge about food and nutrition,but only 60.2% of them passed the test.The situation of the knowledge awareness varied with their living area,education background and occupation.87.5% of the subjects had a good awareness for the relationship between food and disease,and varied with their education and occupation.Television was the most important approach for their acquiring the knowledge about nutrition and food hygiene.81.5% subjects were interested in learning more about nutrition and food hygiene.Conclusions The dietetic habits in residents of Tianjin was still not satisfied.It is necessary to strengthen the propaganda and education of the nutrition and food hygiene in residents and explore an effective education model for them.

Objective To clone the cDNA encoding human HMGB1, express it in E. coli, and identify its biological activity. Methods Human HMGB1 cDNA was amplified by RT-PCR and cloned into vector pUC19. After sequence analysis, the cDNA was ligated into prokaryotic expression vector pQE-80L and induced by IPTG to express HMGB1. The protein was purified with Ni~(2+)-NTA chromatography and polymyxin B affinity column. To identify the function of purified protein, the product was co-cultured with THP1 cells. Results Recombinant expression plasmid pQE-80L/HMGB1 was constructed successfully. After purification, the protein purity reached 96%. The recombinant HMGB1 stimulated THP1 to secrete TNF-? . Conclusion The highly purified HMGB1 was obtained successfully, which showed biological activity. These results lay the foundation for further research on the function of human HMGB1.