Objective To incubate the rat neural stem cells with specific inhibitor (PD98059) of MAPKK/MEK to clarify the effect of MAPKK/MEK-MAPK/ERK signaling pathway in neural stem cells (NSC).Methods NSCs derived fiom E15-16 rats were isolated and cultured.After treated with different concentration of PD98059,they were subjected to the detection of cell proliferation,Nesn'n, BrdU and β-tubulin-Ⅲ by WTS-8 assay,immunofluorescent staining or Western Blot respectively.Results PD98059 had an effect on the survival,proliferation and differentiation of NSC at a concentration-dependent manner.The viability of the NSC was significantly decreased than the control (P＜0.05),whereas the numbers of BrdU-positive and β-tubulin-Ⅲ positive cells were notably fewer than the control (P＜0.05) after incubated with the higher concentration of PD98059.The ERK expression was blocked by PD98059 at a concentration-dependent manner.Conclusion The MAPKK/MEK-MAPK/ERK signaling pathway played a vital role in the survival, proliferation and differentiation of NSC.

Humans are exposed to the ubiquitous radiofrequency (RF, 100 kHz-300 GHz) electromagnetic fields because of the mushroom development of wireless communications,raising concerns over the possible hazards of RF radiations.Epidemiological investigation has showed that chronic use of cellphones increases the risk of brain tumors.Since genetic damage is closely related to tumors, researchers have been trying to find out whether cellphones and other RF devices are genotoxic.However, the investigations have yielded both negative and positive results.This review summarized the recent in vitro and in vivo researches about genotoxicity of RF radiations and proposed a possible mechanism by which of RF radiations cause genetic damage.

AIM: The effects of YIGU capsule on proliferation and IGF-I mRNA protein expressions in osteoblasts were studied. METHODS: (1) Forty 12-month old Sprague-Dawley female rats were divided randomly into four groups (YIGU capsule high dose group, medium dose group and low dose group; saline group), the drug-containing serum and control serum were prepared. (2) The new-born Sprague-Dawley rat osteoblasts were cultured with different YIGU capsule drug-containing serum at different concentrations and different exposure time. MTT method was used to observe proliferation of osteoblasts. (3) RT-PCR method was used to measure the relative IGF-I mRNA levels and ELISA method was used to measure IGF-I secretion at different exposure time. (4) ELISA method was used to measure IGF-I secretion at different exposure time. RESULTS: (1) Proliferation of osteoblasts was more than the control groups after 48, 72 and 96 h, respectively (P

AIM: The effects of benefiting-bone Capsule (BBC) containing serum on IL-6 mRNA and protein expression in osteoblasts were studied.METHODS: (1) The neonate Sprague-dawley rat osteoblasts were cultured and divided into three groups: group Ⅰ (containing deactivating serum with BBC), group Ⅱ (containing deactivating serum without BBC) and group Ⅲ (DMEM medium group); (2) RT-PCR was used to measure the relative IL-6 mRNA levels; (3) The radioimmunoassay method was used to examine IL-6 protein in the supernatant of the cultured osteoblasts. RESULTS: (1) The relative IL-6 mRNA levels was lower in group I than the control ( P

Adult ; Endocarditis ; microbiology ; Humans ; Male ; Mycoses ; Recurrence

Objective To investigate the diagnostic value of 1H magnetic resonance spectroscopy (1H-MRS) in mammary tumors and to discuss the technique factors which influence the detection rate.Methods The 1H-MRS features of 47 mammary tumors, of which 24 malignant tumors and 23 benign tumors confirmed by pathology were analyzed. All of the tumors were detected before Gd-DTPA enhancement. Results Eleven of 24 malignant tumors showed increased choline resonance peak at 3.24 ppm while 4 of 23 benign ones at 3.24 ppm .The positive value were 45.8% and 17.4% respectively. The sensitivity and specificity were 45.8% and 82.6% respectively by using 1H-MRS to discriminate benign from malignant tumors. The main factors influencing the detection rate were low suppressed lipid, low suppressed water and low single-noise rate.Conclusion Choline is not special features of malignant tumors. Choline can be obtained despite the nature of tumor if they grow rapidly. The low sensitivity of choline to be detected mainly dues to technique factors.

Haemophilia is caused by lack of coagulation factor VIII or IX in patients′blood with inadequate hemostasis.Currently recombinant coagulation factor VII(rFVII)produced in different cells is used against clini-cal bleeding of haemophilia patients.To enhance the production and activity of rFVII;some eukaryotic cells such as baby hamster kidney(BHK);Chinese hamster ovary(CHO);insect cell and fish embryo;were used to express rFVII.Meanwhile;the effect of functional gene on the activity of rFVII and the limitation of rFVII production caused by post-translational modification were investigated by different methods.The role of rFVII in hemostasis;synthesis of rFVII in different eukaryotic cells and impact on production of post-translational modification are reviewed in this article.

Background and purpose:Stromal tumor is one of the common gastrointestinal mesenchymal tumors. There is certain understanding about the typical cases. However, the diagnosis of those occurring in rare location or with rare imaging findings is often difficult. This research summarized this kind of cases,in order to increase the radiological knowledge of the disease.Methods:This study retrospectively analyzed clinical, radiological and pathological data from 550 patients who had stromal tumor conifrmed by pathology in our hospital. Those with incomplete data were eliminated. Forty-nine patients were selected for further study according to the typical imaging findings.Results:Among these 49 patients, 9 were pathologically confirmed to have extra-gastrointestinal stromal tumor, while 40 patients had gastrointestinal stromal tumor. Among the patients with gastrointestinal stromal tumor, 22 were found in rare locations, 12 in retroperitoneal space, 3 in omentum majus and mesenterium, 5 in esophagus, and 2 in prostate. Obvious cystic degeneration was found in 16 patients. Bulky calciifcation, such as lfake or annulus, was found in 7 patients. The analysis result of risk-stratiifcation showed 19 patients were conifrmed as high-grade among the patients with tumors found in rare locations, 15 as high grade among those with obvious cystic degeneration, and 7 as high-grade among those with extra-gastrointestinal stromal tumor.Conclusion:Rare stromal tumor often occurs in the locations, such as retroperitoneal space, omentum majus and mesenterium. Obvious cystic degeneration and bulky calciifcation can be seen. The risk-stratiifcation of these patients often showed high-grade. Comprehensively analyzing its clinical features and imaging ifndings can help improve the diagnostic accuracy.

ObjectiveTo compare detection rate of pulmonary nodules and the radiation doses of digital tomosynthesis (DTS) and MSCT chest scanning by using the anthropomorphic chest phantom which containsthermoluminescent dosimeters( TLD ) and simulated pulmonary nodules.Methods The radiation doses of DTS and MSCT scanning were measured by using the anthropomorphic chest phantom which contains 45 TLD and simulated pulmonary nodules.The radiation doses of najor organs were converted into effective dose ( ED ). Three radiologists of different clinical experiences independently reviewed and recorded the density,diameter and position of pulmonary nodules.The sensitivity of nodule detection by DTS and MSCT were compared by Fisher exact test and Chi-square test. The paired t test was conducted to analyze the dose levels of DTS and MSCT.ResultsThe sensitivity of detection nodule by DTS and MSCT were 66.7％ (30/45) and 91.1％ (41/45) respectively.Statistically significant difference between the two examinations existed ( x2 =8.073,P ＜ 0.05).The sensitivity of detection - 650 HU ground glass opacity pulmonary nodule by MSCT and DTS were 93.3％ (14/15) and 73.3％ (11/15) respectively.There was no significant difference between DTS and MSCT ( P ＞ 0.05 ).The sensitivity of detection - 800 HU ground glass opacity nodule and ground glass opacity nodule (d ＜ 8 mm) by DTS were 33.3％ (5/15) and 16.7％ (2/12) respectively,which were lower than those by CT[80.0％ (12/15) and 66.7％ (8/12)].The radiation doses of DTS for various organs in the chest were lower than those of CT. Statistical significant difference between DTS and MSCT existed ( lung t =19.69,thoracic vertebral t =30.01,heart t =16.33,liver t =5.06,breast t =9.43,thyroid gland t =8.05 ;P ＜ 0.05).The effective doses of the DTS and MSCT were 0.65 and 7.71 mSv respectively.ConclusionsThere is no difference between the DTS and MSCT in the detection rate of -650 HU ground glass opacity nodule.For detecting the ground glass opacity nodule ( - 800 HU) and ground glass opacity nodule (d ＜ 8 mm),MSCT is superior to DTS. However,the radiation dosage of DTS is 8.41％ of the MSCT scanning.

Objective To investigate the expression profiles of microRNA in early esophageal squamous cancer and normal esophageal tissues and verify the significantly different expression miRNAs , further to study the effects on proliferation of EC109. Methods The microarray assay was performed to analyze miRNA expression profiles in three pairs of early esophageal squamous cancer and the corresponding normal esophageal tissues. Quantitative real-time polymerase chain reaction (qRT-PCR) was used in another 38 pairs samples to further verify the differentially expressed miRNAs . Three verified miRNAs ( miR-29a, miR-221 and miR-222) mimics were transfected into EC109 respectively and CCK8 method was used to study the effect of cell proliferation in each miRNA. Results Microarray technique selected 53 miRNAs that differentially expressed in early esophageal squamous cancer and normal esophageal tissues , 32 miRNAs were up-regulated and 21 miRNAs were down-regulated. qRT-PCR verified that miR-29a was significantly down-regulated (P < 0.05) and miR-221, miR-222 were significantly up-regulated (P < 0.05) in early esophageal squamous cancer tissue. Over-expression of miR-29a could significantly inhibit the proliferation of EC109 (P < 0.05) whereas over-expression of miR-221 or miR-222 could both significantly promote the proliferation of EC109 (P < 0.05). Conclusion There was significant difference of miRNAs expression between early esophageal squamous cancer and normal esophageal tissues, and the differentially expressed miRNAs could be used as new biomarkers for early diagnosis of esophageal squamous cancer.