Biomedical Research ; China ; Preventive Medicine ; Research Support as Topic

Biomedical Research ; China ; Preventive Medicine ; Research Support as Topic

Objective To compare humoral immune response of BALB/c mice immunized by recombinant plasmids poDNA3.1-BE and pcDNA3.1-NE. Methods The BALB/c mice were immunized by recombinant plasmids pcDNA3.1-BE, pcDNA3.1-NE with adjuvant. Each animal received a primary inoculation and two boosts at 2-week intervals. Then the blood samples of BALB/c mice were collected from different experiment groups at day 14, 28, 42, 70 and 98, respectively after first immunization. The specific IgM/IgG antibodies for E protein in serum were confirmed by indirect ELISA. And then the activities of the specific neutralizing antibody were determined by cytopathic effect inhibition (CPEI). Results The levels of specific IgM/IgG antibodies and neutralizing antibody activities were increased in PODNA3.1-BE enhance immunization group than that of other groups. The result had been observed longer duration of antibody level in pcDNA3.,-BE enhance immunization group. Conclusion Humoral immune response were significant differences between recombinant plasmid pcDNA3.1-BE and PcDNA3.1-NE immunized mice groups.

Objective To explore the value of 18 F-fluorodeoxyglucose (i8 F-FDG) PET/CT examination in the differential diagnosis of the gastric cancer and primary gastric lymphoma (PGL).Methods The clinical data of 80 patients with gastric cancer (60 with non-mucinous adenocarcinoma and 20 with mucinous adenocarcinoma) and 47 patients with PGL [22 with mucosa-associated lymphoid tissue (MALT) and 25 with diffuse large B-cell lymphoma (DLBCL)] who were admitted to the Tianjin Medical University Cancer Institute and Hospital from June 2006 to May 2014 were retrospectively analyzed.Spiral CT scan was first done and then followed by PET.The CT value of the lesions,maximum standardized uptake value (SUVmax) of patients and maximal gastrointestinal wall thickness (THKmax) were analyzed by the ANOVA test.The SUVmax comparison between groups was evaluated with the Student-Newman-Keuls.The lesions type was analyzed by the chi-square test.The THKmax and SUVmax among groups were analyzed by the Pearson correlation analysis.Results 18 F-FDG PET/CT imaging of patients with gastric cancer and PGL showed different types of gastric wall thickening,segmental and limited thickening of gastric wall were the main features of gastric cancer and diffuse and segmental thickening of gastric wall were the main features of PGL.The type Ⅰ,Ⅱ and Ⅲ of lesions were detected in 12,21 and 27 of 60 patients with nonmucinous adenocarcinoma,in 2,7 and 11 of 20 patients with mucinous adenocarcinoma,in 8,8 and 6 of 22 patients with MALT and in 13,7 and 5 of 25 patients with DLBCL respectively.There were significant differences in the 4 pathological types of lesions among all the patients (x2 =14.849,P ＜ 0.05).The lymph nodes beneath the renal hilum and at the retroperitoneum were involved in 16 patients with gastric cancer and in 10 patients with PGL,and 7 patients with gastric cancer and 12 patients with PGL were complicated with splenomegalia,respectively,showing a significant difference in the splenomegalia between patients with PGL and gastric cancer (x2=7.506,P ＜0.05).There was no significant difference in the metastasis of lymph nodes beneath the renal hilum and at the retroperitoneum between patients with PGL and gastric cancer (x2=0.178,P ＞0.05).Among 80 patients with gastric cancer,positive 18F-FDG was detected in 79 patients and negative 18F-FDG in 1 patient with T3 stage of mucinous adenocarcinoma.Among 47 patients with PGL,positive 18 F-FDG was detected in 46 patients and negative 18F-FDG in 1 patient with stage Ⅰ of MALT.The CT value of the lesion,SUVmax and THKmax in patients with non-mucinous adenocarcinoma,mucinous adenocarcinoma,MALT and DLBCL were (40 ± 8)HU,(39±11)HU,(41±11)HU,(38±9)HU and 9.9 ±6.6,5.6±1.9,4.6 ±2.9,18.3±7.6 and (2.1 ± 1.2) cm,(1.9 ± 0.9) cm,(1.3 ± 1.1) cm and (2.6 ± 1.5) cm,respectively,showing significant differences in the SUVmax among all the groups (F =26.920,P ＜ 0.05).In the pairwise comparisons,there were no significant difference between the MALT group and mucinous adenocarcinoma group (P ＞ 0.05),and significant differences among the other groups (P ＜ 0.05).The CT value of the lesions and THKmax among all the patients were compared,with no significant differences (F =0.578,4.510,P ＞ 0.05).There were no significant differences in the SUVmax and THKmax among all the patients (r =0.055,0.346,0.226,0.133,P ＞ 0.05).Conclusions There is an important diagnosis value of PET/CT examination in patients with gastric cancer and PGL.The pathological types of the lesions in patients with gastric cancer and PGL are different.The occurrence of splenomegalia in patients with PGL is easier than that with gastric cancer.SUVmax of patients with DLBCL is higher than those with gastric cancer and MALT.FDG uptake in patients with mucinous adenocarcinoma and MALT are not enough,and these may lead to false negative result of PET/CT examination.

There are no convenient techniques to evaluate the degree of facial nerve injury during a course of acupuncture treatment for Bell's palsy. Our previous studies found that observing the electrical response of specific facial muscles provided reasonable correlation with the prognosis of electroacupuncture treatment. Hence, we used the new method to evaluate the degree of facial nerve injury in patients with Bell's palsy in comparison with the House-Brackmann scale. The relationship between therapeutic effects and prognosis was analyzed to explore an objective method for evaluating Bell's palsy.

Objective: Lung metastases are common in patients with differentiated thyroid carcinoma (DTC). Post-therapeutic 131I-whole-body scan (WBS) was conventionally administered after the radioactive iodine treatment (RAI) of DTC lung metastases. This study aimed to investigate the influencing factors of WBS imaging on the RAI of DTC lung metastases. Methods:DTC patients (n=60) with lung metastases treated with 131I were retrospectively included. Before treatment, the thyroid function was assessed. Neck and chest computed tomography (CT) was performed, and WBS was inspected. Patients with lung metastases were classified into negative and positive subgroups according to the imaging of 131I WBS, and the relative influencing factors were analyzed. Results:Univariate analy-sis showed that age and chest CT imaging, which revealed pulmonary fibrosis, calcification, and patchy shadows, were related to WBS imaging. Binary variable logistic regression analysis revealed that pulmonary fibrosis (OR=0.175, P<0.001) and calcification (OR=0.088, P<0.05) went against the development of WBS. Conclusion:WBS imaging on RAI of lung metastases was not obvious in the el-derly. The fibrosis, calcification, and patchy shadows of the lung were not conducive for WBS imaging. The fibrosis and calcification of the lung were the main factors that affect WBS imaging.

To assess and grade facial nerve dysfunction according to the extent of facial paralysis in the clinical course of acupuncture treatment for Bell's palsy, and to observe the interrelationship between the grade, the efficacy and the period of treatment, as well as the effect on prognosis.

Objective T o observe cardiac ultrastructure and the expression of heat shock protein 70 (H SP70) and hypoxia inducible factor-1α (H IF-1α) in electric shock death rats and to explore the application of these indexes as the basis of m edical identification in electric shock death. Methods Seventy-tw o SD rats w ere random ly divided into electric shock death group, postm ortem electric shock group and the control group. T he changes of m yocardial ultrastructure w ere observed by transm ission electron m icro-scope, and the expressions of m yocardial H SP70 and H IF-1α w ere observed by im m unohistochem ical technology. Results M yocardial m yofibril fracture, m itochondrial cristae and m em brane dissolution, and disordered arrangem ent of Z lines and M lines w ere observed in electric shock rats. H SP70 and H IF-1αw ere strong positive expressions in the electric shock death group, significantly com pared w ith the con-trol and postm ortem electric shock groups (P<0.05). Conclusion T he expressions of H SP70 and H IF-1αw ere obviously increased in electric shock death group, w hich m ay be used as the diagnostic indicator of electric shock death.

It remains unclear whether language tasks in one's first (L1) or second (L2) language can cause stress responses and whether frontal, autonomic and behavioral responses to stressful tasks are correlated. In this study, we studied 22 Chinese subjects whose L2 was English and measured the cerebral blood oxygenation in their frontal lobe by using functional near-infrared spectroscopy (fNIRS) as participants engaged in a mental arithmetic task (MAT) and verbal fluency tasks (VFTs) in L1 (Chinese) and L2 (English). To examine the activated cortical areas, we estimated the channel location based on Montreal Neurological Institute (MNI) standard brain space by using a probabilistic estimation method. We evaluated heart rate (HR) changes to analyze autonomic nervous system (ANS) functioning. We found that the MAT and VFTs induced greater increases in HR than did the control (Ctrl) task. Furthermore, subjects developed greater increases in HR in the MAT and VFTL2 than they did in the VFTL1. Compared with the Ctrl task, the MAT and both VFTL1 and VFTL2 produced robust and widespread bilateral activation of the frontal cortex. Interestingly, partial correlation analysis indicated that the activity in the left inferior frontal gyrus (LIFG) [Brodmann's area (BA) 47] was consistently correlated with the increases in HR across the three tasks (MAT, VFTL2, and VFTL1), after controlling for the performance data. The present results suggested that a VFT in L2 may be more stressful than in L1. The LIFG may affect the activation of the sympathetic system induced by stressful tasks, including MATs and VFTs.

OBJECTIVETo analyze the projects of the general program in preventive medicine submitted to and funded by National Natural Science Foundation of China (NSFC) from 2004 to 2006, and to discuss the disadvantages of these projects and foundation trends.

METHODS4124 projects submitted and 656 projects supported in 16 fields of preventive medicine between 2004 to 2006 were analyzed statistically.

RESULTS1082, 1378 and 1664 projects were submitted to NSFC and 199, 210 and 247 projects were financially supported in last three years, respectively, with selecting rate 18.4%, 15.2% and 14.8%, respectively. The number and the selection rate of projects supported in the different study fields from 2004 to 2006 were 15 (7.5%), 24 (11.4%) and 18 (7.3%) in environmental health, 8 (4.0%), 12 (5.7%) and 15 (6.1%) in occupational health, 30 (15.1%), 24 (11.4%) and 31 (12.6%) in nutrition and food hygiene, 3 (1.5%), 4 (1.9%) and 4 (1.6%) in child and adolescent health, 14 (7.0%), 20 (9.5%) and 20 (8.1%) in toxicology, 7 (3.5%), 7 (3.3%) and 2 (0.8%) in social medicine, 17 (8.5%), 22 (10.5%) and 31 (12.6%) in epidemiology, 7 (3.5%), 7 (3.3%) and 10 (4.0%) in endemiology, 2 (1.0%), 5 (2.4%) and 5 (2.0%) in biostatistics, 0 (0%), 2 (1.0%) and 1 (0.4%) in health laboratory technology, 7 (3.5%), 2 (1.0%) and 7 (2.8%) in vector biology, 15 (7.5%), 9 (4.3%) and 16 (6.5%) in parasitology, 0 (0%), 2 (1.0%) and 0 (0%) in disinfection, 58 (29.1%), 51 (24.3%) and 58 (23.5%) in infectious disease, 3 (1.5%), 1 (0.5%) and 5 (2.0%) in sexually transmitted disease, 13 (6.5%), 18 (8.6%) and 24 (9.7%) in dermatology, respectively. The contents of these research subjects reflected that more importance has been attached to the fields of preventive medicine. However, it is necessary that original and innovatory research should be further strengthened, and the field and prospective study should be emphasized in the future.

CONCLUSIONRapid advancement have been made in the fields of toxicology, epidemiology, environmental health, nutrition and food hygiene, and infectious disease, while other areas such as social medicine, health laboratory technology, disinfection and sexually transmitted disease need a rapid advancement. In general, the levels of the projects received and funded have been elevating yearly.