Objective: To observe the therapeutic efficiency of adenovirus-mediated interleukin-12 gene(AdmIL-12) and CD40 ligand gene(AdmCD40L) intratumoral transfer in established murine melanoma in vivo. Methods: C57BL/6 mice were inoculated subcutaneously with B16 cells to establish the murine melanoma model. The tumor-bearing mice were injected intratumorally with murine IL-12 gene and CD40L gene recombinant adenovirus. Tumor growth and the survival of tumor-bearing mice were observed. The CTL activity was measured in vitro by lactate dehydrogenase(LDH) release assay. Results: Both AdmIL-12 and AdmCD40L can be efficiently expressed in vitro and in vivo. The treatment with AdmIL-12 could significantly inhibit the tumor growth and prolong the survival period of the tumor-beraing mice. Splenic CTL activity of the mice was also enhanced after IL-12 gene transfer. But the anti-tumor effects of AdmCD40L gene were not significant. In contrast, Co-delivery of IL-12 gene and CD40L gene lead to stronger antitumor effects than IL-12 gene alone. Conclusion: Adenovirus-mediated interleukin-12 gene and CD40 ligand gene transfer together intratumorally has significant therapeutic effects on mice melanoma in vivo.

Previous studies have shown that paeonol can antagonize acute myocardial ischemia and infarction in rat. This study further researched the effects of paeonol on blood pressure and blood flow in the artery of spontaneously hypertensive rats and its mechanisms related on vasomotion. Firstly, thirty spontaneously hypertensive rats were randomly divided into spontaneously hypertensive control group and paeonol-treating groups of high dose and low dose, and also, the other ten Wistar rats as healthy control group. Before and after the intraduodenal administration of the drug, arterial blood pressure was measured by carotid artery and blood flow through the renal artery and carotid artery in vivo were measured by animal flowmeter. The same volume of solvent was given to the spontaneously hypertensive control group and the healthy control group, and the other operations were same. In order to further study the effect of paeonol on vasomotor function, the superior mesenteric artery, renal artery and coronary artery of the spontaneously hypertensive rat were removed and separated, precontracted by a certain concentration of potassium chloride (KCl) and 5-serotonin (5-HT) respectively, and dilatory responses were assessed by cumulative addition of paeonol. Results showed that after duodenal one-time delivery of paeonol, the blood pressure significantly lowered, the renal arterial blood flow and the carotid arterial blood flow significantly increased in spontaneously hypertensive rat. And also, paeonol relaxed the mesenteric artery, renal artery and the coronary artery of spontaneously hypertensive rat in a concentration-dependent manner. These results indicated that the effect of paeonol on decreasing arterial blood pressure and increasing the arterial blood flow was related to its vasodilative effect.
Acetophenones ; pharmacology ; Animals ; Blood Pressure ; drug effects ; Male ; Rats ; Rats, Inbred SHR ; Regional Blood Flow ; drug effects ; Vasodilator Agents ; pharmacology

Objective To set up the rolling circle amplification (RCA) system for detecting hepatitis B virus (HBV) covalently closed circular DNA (cccDNA), and to evaluate the specificity and sensitivity of this system. Methods Plasmids containing full-length of wild-type HBV genome were treated with restriction enzyme and T4 DNA ligase, and then were concentrated. The DNA fragments were recovered by the nucleic acid purification kit and severed as standard HBV cccDNA. Total DNA was extracted from hepatic tissues of seven chronic hepatitis B patients. RCA method was used to amplify genomes from tissue samples. Standard HBV cccDNA, 3.2 kb liner HBV DNA, normal hepatic tissue samples and 15 serum samples of patients with chronic HBV infection were used as controls to determine the specificity of RCA. Ten-fold serial dilutions of standard HBV cccDNA were used for determining the sensitivity. Results The standard HBV cccDNA was successfully constructed and could be detected by RCA method. HBV cccDNA could be amplified from 2 mg hepatic tissue samples at least of HBV infected patients, and could be detected as low as 1 ×102 copy/μL. cccDNA was not detected in 3.2 kb liner HBV DNA, normal hepatic tissue samples and 15 serum samples of chronic HBV infected patients. Conclusion RCA method can be used for rapid and simple detection of HBV cccDNA with high specificity and sensitivity.

Objective To investigate the underlying neural mechanism of left hemiparalexia and left hemialexia in reading Chinese characters. Methods A patient with reading disorders caused by brain infarctions at the left ventralis medialis occipitotemporal lobe and the splenium of the corpus callosum was studied. A series of neuropsychological tests, such as reading Chinese characters presented in the central foveal field or in the left and right half of the foveal field, were conducted with the patient, and neuroimaging techniques including high spatial resolution 3D-MRI and diffusion tensor tractography (DTT) were used to examine whether or not there were lesions of the neural pathway. Results The patient showed left hemiparalexia, which was characterized by making substitution or omission mistakes, mostly in the left parts of Chinese characters, and also left hemialexia(alexia for characters presented in left visual field). 3D-MRI demonstrated infarctions in the left ventral mesial occipitotemporal area and in the left side of the splenium of the corpus callosum. The left lateral mid-fusiform cortex, which has been identified as the visual word form area(VWFA), was almost intact. DTT indicated the major forceps fibers running through the splenium were all disconnected due to the infarction of the left splenium. Conclusion As a result of disruption of the splemium-major forceps pathway, visual character information in the left visual field which is initially projected to the right occipital cortex cannot be transferred from the right visual cortex to the left VWFA. This mechanism of left hemiparalexia and left hemialexia in reading Chinese characters is similar to that in reading English words.

Background and purpose:Tumor budding is a poor prognostic factor in colorectal cancer. In this study, we studied the tumor budding by counting the actual number in 10 high power fields and evaluated itsclinical application in predicting lymph node metastasis of T1 colorectal cancer.Methods:Tissue specimens from 307 patients with histologically conifrmed T1 colorectal cancer were enrolled. The clinicopathological characteristics including tumor budding were evaluated for their predictive value in lymph node metastasis. A formula was created to calculate the risk score for prediction of lymph node metastasis which was validated by 14 new cases.Results:In the multivariate analysis, it showed that tumor grade, lymphovascular invasion and the number of tumor budding were signiifcantly associated with lymph node metastasis. The probability of lymph node metastasis was calculated using the following equations:Z=1.571×(lymphovascular state: invasion, 1; no invasion, 0)+2.661×(tumor grade: high grade, 1; low grade, 0)+0.024×(budding counts)-3.885; Probability=1/1+e-Z. The high scores were correlated with the lymph node metastasis in the validations.Conclusion:We can accurately assess the risk of lymph node metastasis by counting the number of tumor budding in 10 high power fields. Therefore tumor budding could potentially assist treatment decision making in T1 colorectal cancer patients with high-risk lymph node metastasis.

Objective To investigate the diagnositc value of high frequency ultrasound guided fine needle aspirates (FNA) and thyroglobulin (Tg) in fine-needle aspirate fluid (FNA-Tg) measurement for detecting metastatic lymph nodes in patients underwent thyroidectomy for papillary thyroid carcinoma (PTC).Methods Sixty-five patients with 79 suspected metastatic lymph nodes were retrospective analysis in this study.FNA for suspected lymph nodes was performed guided by high frequency ultrasound and FNATg was measured.The histopathologic diagnosis for all of the suspected lymph nodes was obtained after lymphadenectomy.Results By histopathologic diagnosis,62 lymph nodes were positive metastasis,while 17 were negative metastasis.Fifty-four lymph nodes were diagnosed as positive metastasis and 25 as negative metastasis by FNA.The accuracy,sensitivity,specificity,positive predictive value and negative predictive value of FNA for assessing cervical metastatic lymph nodes from PTC were 89.87％ (71/79),87.10％ (54/62),100％ (17/17),100％ (54/54) and 68.00％ (17/25),respectively.Sixty-five lymph nodes were diagnosed as positive metastasis and 14 as negative metastasis by FNA-Tg.The accuracy,sensitivity,specificity,positive predictive value and negative predictive value of FNA-Tg were 96.20％ (76/79),100％ (62/62),82.35％ (14/17),95.38％ (62/65) and 100％ (14/14),respectively.There was no significant difference between FNA and FNA-Tg for evaluating cervical metastatic lymph nodes from PTC (x2 =1.454,P =0.228).Eight positive metastatic lymph nodes which were missed by FNA were corrected diagnosed by FNA-Tg measurement.Conclusions Both FNA and FNA-Tg are effective methods for assessing cervical metastatic lymph nodes from PTC postoperatively,and these two methods could be combined for early and accurate evaluating the lymph nodes state.

Objective To study the risk factors of lymph node metastasis in the central neck compartment of thyroid carcinoma,and to explore the reasonable range of lymph node dissection in central neck dissection for clinically node-negative papillary thyroid microcarcinoma patients.Methods From Dec.2015 to Dec.2016,a total of 200 patients with CN0 papillary thyroid carcinoma were randomly divided into two groups according to the registration number:unilateral central neck dissection group and bilateral central neck dissection group in Department of Thyroid Surgery,Fujian Medical University Union Hospital.The risk factors of lymph node metastasis and value of bilateral central neck dissection were analyzed.Results The risk factors of lymph node metastasis in the central papillary thyroid carcinoma were ≥0.7 cm in diameter and older than 45 years in age and gender in male.Further analysis found that contralateral central lymph node metastasis occurred in patients with tumor diameter ≥0.5 cm.The positive rate was 22％.The number of lymph nodes detected in the unilateral and bilateral central areas was 9.53±6.04 and 12.19±7.18,P=0.035,respectively.The positive numbers of lymph nodes were 1.17±1.47 and 2.11±2.75,P=0,022 respectively.Conclusion In patients with tumor diameter ≥0.5 cm,bilateral central neck dissection is conducive to improving the thoroughness of tumor dissection and does not increase the risk of complications.

To study the biological characteristics and mutations of influenza A(H1N1)pdm09 virus isolated from one case of pneumonia of unknown etiology (PUE),which would provide references for clinical treatment and disease control,the throat swab specimen from the PUE case was isolated in the Madin-Darby Canine Kidney (MDCK) cells,and then the antigenicity,pathogenicity and drug resistance of influenza A (H1N1) pdm09 virus were analyzed after sequencing.As a result,one influenza virus strain was isolated from the specimen and named as A/FujianGulou/SWL64/2016(H1N1).The similarities of nucleotide sequences and amino acids sequences compared with the vaccine strain A/California/07/2009 (H1N1) were 96.9％-98.9％ and 96.7％-99.5％,respectively.Eighteen amino acids had mutated in the HA and 4 mutations,K163Q,S185T,S203T and D222N,were involved in 3 different epitopes,which indicated that the antigenic drift had occurred in the influenza virus.The D222N mutation associated with receptor binding site made the virus infect lower respiratory tract more easily.The virus was still amantadine-resistance and oseltamivir-sensitive.In conclusion,the influenza A (H1N1) pdm09 virus in this study have occurred antigenic drift and has the molecular characterization of causing severe pneumonia,so further surveillance should be performed to prevent and control the influenza epidemic.

0.05),but a significant difference at weeks 4,8,and 12 between two groups(P

BACKGROUND: Low back pain and low limb disability are classical symptoms of patients with degenerative lumbar spondylolisthesis who are often treated with operative internal fixation.OBJECTIVE: To observe the improvement of low-back pain and low-limbs disability of patients with degenerative lumbar spondylolisthesis following the treatment with general spine system(GSS).DESIGN: Self control clinical study with patients as subjects.SETTING: Department of Orthopaedics, Peking Union Medical College Hospital.PARTICIPANTS: Sixteen patients with degenerative lumbar spondylolisthesis combined with lumbar stenosis, including 10 males and 6 females with the average age of 58.5 years(ranged from 42 to 72 years) received treatment in our hospital between September 2001 and December 2001. Patients with low back pain were found in 16 cases and low-limb claudication in 15cases; preoperative spondylolisthesis of grade I was observed in 10 cases and grade Ⅱ in 6 cases.METHODS: After receiving lumbar canal decompression by spinal process and GSS for restoring spondylolisthetic vertebra, as well as internalfixation and lumbar fusion operation, patients were followed up at postoperative week 2 and month 1,3,6,12,18,24 for assessing the low-back pain and low-limb disability and meanwhile preoperative spondylolisthesis and postoperative restroration were also assessed with X-ray.RESULTS: Totally 16 patients were followed up for an average of21.2appeared in 15 out of 16 patients, and intermittent claudication resumed to time of follow-up revealed that all spondylolisthetic vertebra were restored with restoring rate of 100% (16/16).CONCLUSION: GSS was proved of satisfactory therapeutic effect in patients with spondylolisthesis by obviously improving their low-back pain and intermittent claudication.