Survival and Prognosis of Primary Mediastinal and Pulmonary Sarcoma Based on SEER Database / 肿瘤防治研究

Objective To analyze the factors affecting the prognosis of soft tissue sarcomas originating from the mediastinum and lung using relevant data from the SEER database. Methods The data of 376 patients were collected from the SEER database, and were randomly divided into the train set (n=263) and validation set (n=113). The relationship between each variable and patient survival and prognosis was analyzed using the Kaplan-Meier method and Cox proportional risk regression to establish a nomogram, to predict the overall survival of patients. The calibration curves, consistency index, and ROC curves were used to evaluate the performance of the nomogram. Results Histological type, surgery, chemotherapy, tumor size, and tumor stage were the factors affecting the prognosis of primary mediastinal and pulmonary soft tissue sarcomas. The established nomogram could predict the 6-month, 1-year, and 2-year overall survival of patients, and the calibration curves showed good prediction accuracy with measured values. C index of the train set and validation set were 0.754 and 0.745, respectively. The areas under the curve of ROC were 0.849 and 0.924. Conclusion The nomogram established in this study can predict 6-month, 1-year, and 2-year overall survival in patients with primary mediastinal and pulmonary soft tissue sarcoma.

Diagnostic value of anti-MDA5 antibody for interstitial lung disease in adult or juvenile dermatomyositis: A meta-analysis / 临床检验杂志

Objective The current meta-analysis was performed to update the evidcnce on anti-melanoma differentiation-associated gene 5 (MDA5) antibody for the diagnosis of rapid progressive interstitial lung disease (RPILD) and chronic ILD in adult or juvenile dermatomyositis (JDM).Methods The electronic search on PubMed,Embase,Cochrane Library,CNKI,WangFang Data,VIP and China Biology Medicine database was conducted from their inception to May,2017.Meta-disc1.4 was used to calculate heterogeneity and obtain the pool sensitivity,specificity,diagnostic odds ratio,positive and negative likelihood ratios and summarized receiver operating characteristic (SROC) curve.Quality assessment and publication bias were determined by QUADAS-2 and STATA 12.0.Results A total of 32 studies with high quality and middle heterogeneity were selected for the final data synthesis.Anti-MDA5 showed a higher diagnostic and prognostic value for RPILD (AUC =0.927,Q * =0.862),compared with chronic ILD (AUC =0.717,Q * =0.667) in adult dermatomyositis patients.For diagnosing RPILD in JDM,the value of MDA5 detection (AUC =0.836,Q * =0.768)was weak.For the prediction of RPILD,the validity of anti-MDA5 detection in clinical amyopathic dermatomyositis (CADM) (AUC =0.942,Q* =0.880) was higher than that in DM (AUC =0.926,Q * =0.860),which was also more applicable to East-Asia populations (AUC =0.960,Q* =0.891),compared with Chinese (AUC =0.925,Q* =0.859) and Western populations (AUC =0.928,Q* =0.863).The methodological assessment for different anti-MDA5 detection implied ELISA (AUC =0.929,Q* =0.864) was superior in performance as immunoprecipitation (AUC =0.927,Q* =0.859),and there was no publication bias according to Deek's plot.Conclusion Anti-MDA5 antibody should be a significant laboratory index for diagnosis and prediction of ILD in adult DM and JDM with high sensitivity and specificity.

The Effect of Myeloid Differentiation Factor 88 Inhibitor ST2825 on the Autophagy of THP-1 Cells Infected with Recombinant Mycobacteriumsmegmatis / 中国医科大学学报

Objective To investigate the effect of myeloid differentiation factor 88 inhibitor ST2825 on the autophagy of THP?1 cells infected by re?combinant mycobacterium smegmatis. Methods The myeloid differentiation factor 88 inhibitor ST2825 was applied on the THP?1 cells infected by recombinant mycobacterium smegmatis,and three groups were defined:the test group with ST2825 treatment,the control group without ST2825 treatment,and the blank group. Autophagosomes were observed under the fluorescence microscope,and the mRNA expression of Beclin?1 gene and Bcl?2gene was analyzed by RT?PCR. Results Compared with the control group,the number of autophagy fluorescent dots in the test group was ob?viously reduced(P<0. 05),and the expression levels of Beclin 1 gene and Bcl?2 gene were declined as indicated by the RT?PCR detection. Con?clusion The myeloid differentiation factor 88 inhibitor ST2825 might inhibit the autophagy of THP?1 cells through interfering the separation of Be?clin?1 and Bcl?2.

Construction of luciferase reporter gene vector for human MUC5AC gene promoter and analysis of its transcriptional activity / 中南大学学报(医学版)

Objective To clone the human mucin (MUC)5AC gene promoter and construct its luciferase reporter vector for human MUC5AC gene and analyze its transcriptional activity. Methods The 1 348 bp DNA sequence at the human MUC5AC gene 5 end was analyzed by the Vector NTI software.After the target sequence from human A549 cells genomic DNA was amplified by PCR method, and the product of PCR was sequenced.By promoter deletion analysis, 3 promoter segments with diferent lengths were amplified by PCR, then the products were identified by DNA sequencing, and 4 promotor segments were inserted into pGL3- enhancer vectors.Site-specific mutagenesis technique was used to establish mutants of specificity protein (SP)-l and nuclear factor-kappa B (NF-кB) site in MUC5AC gene promoter. The relative luciferase activities were detected in the transfected A549 cells. Results Sequence analysis indicated that there were many cis-acting elements in the regions of 1 348 bp DNA sequence at the human MUC5AC gene 5 end.The 4 reporter gene vectors with promoter segments with different lengths were constructed successfully.Dual-luciferase assay revealed the 372 bp fragment including activity with the minimal fragment. Neutrophil elastase (NE) could increase the expression of luciferase reporter gene plasmid containing mutated NF-кB version (P＜0.05 vs. contro1) of MUC5AC promoter in the transfected A549 cells. The induction by NE decreased markedly when the SP-l element in MUC5AC promoter were mutated. Conclusion This research may provide an important basis for the further study of human MUC5AC gene promoter activity and regulation of gene expression.There is an up-regulative element of gene transcription in the region of -324 to -64 bp in MUC5AC gene upstream. SP-l site of the promotor mediates NE-induced MUC5AC expression in human A549 cells.

Nomogram for Predicting Survival for Oral Squamous Cell Carcinoma

An accurate system for predicting the survival of patients with oral squamous cell carcinoma (OSCC) will be useful for selecting appropriate therapies. A nomogram for predicting survival was constructed from 96 patients with primary OSCC who underwent surgical resection between January 1994 and June 2003 at the Yonsei Dental Hospital in Seoul, Korea. We performed univariate and multivariate Cox regression to identify survival prognostic factors. For the early stage patients group, the nomogram was able to predict the 5 and 10 year survival from OSCC with a concordance index of 0.72. The total point assigned by the nomogram was a significant factor for predicting survival. This nomogram was able to accurately predict the survival after treatment of an individual patient with OSCC and may have practical utility for deciding adjuvant treatment.

Identification of Differentially Expressed Genes in Papillary Thyroid Cancers

PURPOSE: Techniques designed to identify differentially expressed genes (DEGs) in tumors have become important in modern pathology. Genefishing technique(TM) using the annealing control primer (ACP) system has recently been developed to screen for DEG transcripts. We tried to identify DEGs involved in papillary thyroid cancer (PTC) by using Genefishing technique(TM). MATERIALS AND METHODS: We utilized a new differential display method, designated with Genefishing technique(TM), to analyze DEGs in 21 cases of PTCs. RESULTS: Comparing the gene expression profiles between PTC and normal thyroid, we detected 17 genes that were differentially expressed in PTCs and performed cloning with sequencing in 10 genes. We confirmed the expression patterns of 2 DEGs by RT-PCR assay and identified the same results in 17 out of 21 (81%) PTCs. The 2 DEGs over-expressed in PTCs were identified as DC-STAMP and type I collagen A1. They are novel genes identified first in PTCs. CONCLUSION: We confirmed 2 DEGs in PTCs as DC-STAMP and type I collagen A1 by using Genefishing technique(TM). Although the detailed functions of those 2 genes and their products remain to be determined, the genes will provide insights into mechanisms of carcinogenesis or tumor progression in PTCs.