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Expression of the bcl-2 gene and its significance in human pancreatic carcinoma

Hepatobiliary & Pancreatic Diseases International 2002年第2期1卷 306-308页

作者： Cheng-Yi Sun Bai-Lin wang Chao-Quan Hu Rui-Yun Peng Ya-Bing Gao Qing-Yang Gu de-wen wang from the department of surgery, guiyang medical college, guiyang 550004, china beijing institute of radiation medicine, beijing 100850, china department of surgery Guiyang Medical College Guiyang 550004 China beijing institute of radiation Med. Beijing 100850 China

Objective: To elucidate the expression of the bcl-2 gene in association with both biological characteristics of hu- man primary pancreatic carcinoma and patient's prog- nosis. Methods: The s-p immunohistochemistry assay was used to detect the expression of the bcl-2 gene on para- ffin-embedded sections from 97 cases of primary pan- creatic carcinoma, 32 cases of pancreatitis, and 21 ca- ses of normal pancreas. Results: Among the 97 cases of pancreatic carcinoma, 70 (72.2%) showed positive staining for the bcl-2 pro- tein. In the 32 cases of pancreatitis, 3 (9.4%) showed positive immunostaining for the bcl-2, and in the nor- mal pancreas cases, 1 (4.8%) showed positive immu- nostaining for the bcl-2. However, the positive staining rates of the bcl-2 protein were lower in tumor tissue from the patients with metastases and tumor-node-me- tastasis (TNM) stages Ⅲ, Ⅳ than in those from those with non-metastases, well differentiation, non-invasion and TNM stages Ⅰ, Ⅱ. The patients with positive im- munostaining of bcl-2 have a longer postoperative sur- vival than those with negative staining. Conclusions: Pancreatic carcinoma expressed a high positivity for bcl-2. Findings suggested that the overex- pression of bcl-2 is related to the carcinogenesis and progression of human pancreatic carcinoma. Bcl-2 might be one of the parameters in terms of biological characteristics and good prognosis in patients with pancreatic carcinoma.

关键词： bcl-2 immunohistochemistry pancreatic neoplasms proto-oncogene

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Expert consensus on radiotherapy combined with immunotherapy for esophageal cancer(2024 edition)

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radiation medicine and Protection 2024年第2期5卷 59-67页

作者： Professional Committee of radiation Oncology china Anti-Cancer Association Branch of radiation Oncology Chinese medical Association Branch of radiation Oncology TreatmentPhysician Chinese medical Doctor Association Qingsong Pang Jun wang Zhouguang Hui wencheng Zhang 不详 Tianjin medical University Cancer institute&Hospital Tianjin 300060China the Fourth Hospital of Hebei medical University Shijiazhuang 050011China National Cancer Center National Clinical Research Center for CancerCancer HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100021China Tianjin medical University Cancer Hospital China

Radiotherapy represents an essential treatment approach for esophageal *** recent years,immunotherapy combined with chemotherapy has become the first-line standard treatment for patients with advanced esophageal *** phase III studies on immunotherapy combined with radiotherapy for locally advanced esophageal cancer are currently *** evidence-based medical data are urgently needed to support the integration of immunotherapy and chemoradiotherapy as a new treatment strategy for patients with locally advanced esophageal *** consensus,formulated based on the latest study results,in-depth research,and thorough discussions,provides a comprehensive set of *** document extensively covers treatment strategies and evaluation methods for radiotherapy combined with immunotherapy across patients with operable esophageal cancer,inoperable locally advanced esophageal cancer,and advanced esophageal ***,common complications and radiation-related issues associated with radiotherapy combined with immunotherapy are discussed,serving as clinical *** expert group comprised members from the Professional Committee of radiation Oncology,china Anti-Cancer Association,the Branch of radiation Oncology,Chinese medical Association,and the Branch of radiation Oncology Treatment Physician,Chinese medical Doctor Association.

关键词： Esophageal squamous cell carcinoma Esophageal adenocarcinoma Immunotherapy Chemoradiotherapy Radiotherapy Expert consensus

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Protein Product Encoded by a Human Novel Gene E9730 Enhances AP-1 Activity through Interacting with Jab1

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Acta Biochimica et Biophysica Sinica 2004年第1期36卷 11-15页

作者： Zhao-Qing wang, Han-Dong WEI, and Fu-Chu HE(department of System Biology, beijing institute of radiation medicine, Chinese Human National Center at beijing, beijing 100850, china) department of System Biology Beijing Institute of Radiation Medicine Chinese Human National Center at Beijing Beijing 100850 China

A novel human gene, named E9730 (a clone number of fetal liver cDNA library), has been identified from more than 14,000 expressed sequence tags (ESTs) based on our large scale sequencing of human fetal liver cDNA libraries. Although sequencing of this novel human gene indicates that it is a leucine zipper protein, the function of E9730 and its homologous genes among species is unknown yet. To find out physiological functional clue of E9730, the yeast two-hybrid system was used to screen the E9730-interac-ting protein(s), and one clone containing a cDNA insert with almost the entire coding sequence (amino acids 39-335) of human Jabl (Jun-activating domain binding protein 1) that interacted specifically with E9730 was identified. A specific association between Jabl and E9730 was shown by co-immunoprecipitation and co-localization experiments. Furthermore, E9730 appeared to enhance Jab 1 -induced AP-1 activity in a concentration-dependent manner and Jabl may be involved in the intracellular signaling trans

关键词： human E9730 gene CSN5/Jabl protein-protein interaction signaling transduction

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A Putative NES Mediates Cytoplasmic Localization of Apoptin in Normal Cells

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Acta Biochimica et Biophysica Sinica 2004年第12期36卷 817-823页

作者： Qing-Ming wang*, Guo-Cai FAN, Ji-Zhong CHEN, Hui-Peng CHEN, and Fu-Chu HE* department of Genomics and Proteomics, beijing institute of radiation medicine, beijing 100850, china department of Genomics and Proteomics Beijing Institute of Radiation MedicineBeijing 100850 China

Apoptin, a protein expressed by chicken anemia virus, is found predominantly in the cytoplasm in normal cells, whereas it localizes in the nucleus in transformed and malignant cells. However, the mecha- nisms that regulate the different subcellular localization of Apoptin in normal and tumor cells have not been fully clarified. In this work, a putative nuclear export signal (NES) in Apoptin was predicted. It was testified that the putative NES (pNES) of Apoptin was not a functional NES, but actually acted as a cytoplasmic retention signal. deletion of the pNES led to the nuclear accumulation of Apoptin in normal cells. In addition, when a strong nuclear localization signal was introduced into Apoptin, it exclusively translocated to the nucleus in normal cells. These observations indicated that the cytoplasmic localization of Apoptin in normal cells results from the balance between cytoplasmic retention and nuclear import. On the other hand, the pNES was also proved to be necessary for Apoptin multimerization. Mutants lacking the pNES did not form obviously visible globular aggregates in normal or tumor cells.

关键词： Apoptin nuclear localization signal cytoplasmic retention signal nuclear export signal

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detection and quantitation of PS20, a phosphorothioate oligodeoxynucleotides in monkey plasma

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Acta Pharmacologica Sinica 2004年第6期25卷 99-104页

作者： Ming-mei SHANG, Hai-feng SONG2, Xiu-wen LIU, Zhong-ming TANG department of Pharmacology and Toxicology, the institute of radiation medicine, Academy of Military medical Sciences, beijing 100850, china department of Pharmacology and Toxicology the Institute of Radiation Medicine Academy of Military Medical Sciences 北京 100850

AIM: To establish the method for quantitation of the phosphorothioate oligodeoxynucleotides (S-ODNs) in plasma. METHODS: Two solid-phase extraction columns combined with a strong anion-exchange column were utilized to remove proteins and lipids in plasma, and the salts were removed by a reverse-phase column followed by dialysis with a 2500 Da-cutoff membrane. The concentration of the tested S-ODNs, PS20, and its metabolites extracted from the plasma were determined by the method of non-gel sieving capillary electrophoresis (NGCE) with diode array detection in the presence of internal standard (IS). RESULTS: The method was with good base number specificity. Relative standard deviation % of both intra and inter assay were all less than 10 %, and the total mean recovery was about 91 %. The methodology was successfully used to determine the PK behavior of an anti-tumor antisense S-ODNs in monkeys and identify the metabolites with single base difference. CONCLUSION: The combined method of solid-phase extraction and NGCE could be used to study the pharmacokinetics of S-ODNs, and the main parameters of the methodology met the requirement of PK study.

关键词： antisense oligodeoxyribonucleotides thionucleotides rhesus monkey plasma solid-phase extraction capillary electrophoresis non-gel sieving internal standard

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A novel erythroid differentiation related gene EDRF2 inhibited α-globin gene expression in K562 cells

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Chinese Science Bulletin 2002年第5期47卷 398-402页

作者： wang Duncheng, YANG Xiaoming & SHEN Beifeninstitute of Basic medical Sciences, institute of radiation medicine Sciences, Academy of Military Sciences, beijing 100850, china institute of Basic medical Sciences Institute of Radiation Medicine Sciences Academy of Military Sciences Beijing China

In previous studies, we found that EDRF2 was an erythroid differentiation related factor, whose expression was markedly upregulated during erythroid differentiation. It suggested that this factor played a role in erythropoiesis. By using rapid amplification of cDNA ends technology, we cloned EDRF2 gene 5’-and 3’-cDNA ends successfully. Transfection and Northern blot analysis demonstrated that EDRF2 inhibited mRNA expression of a-globin gene, while did not regulate γ-globin gene expression. Gel shift assay confirmed that DNA-binding activity of erythroid specific transcription factors GATA-1, NF-E2 and AP1 was not affected by either forced overexpression or artificial down-regulation of EDRF2 gene in K562 cells. However, we detected that the negative regulator of expression of GATA-1 transcription factor was increased in EDRF2 overexpressed K562 cells. These results strongly suggested that EDRF2 was involved in a-globin gene expression and erythroid differentiation and served as a negative regulator of

关键词： globin gene erythroid specific transcription factors leucine zipper RACE EMSA.

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A novel aberrant splicing of G_(sa) transcript in human leukemia cell lines

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Chinese Science Bulletin 1999年第4期44卷 340-344页

作者： YE Qinong, YAO Xiao, wang Hengliang, ZHANG Shu, LIU Huaitian, SU Guofu, HUANG Cuifen and ZHOU Tingchong beijing institute of Biotechnology, beijing 100071, china department of Biology, Shaanxi Normal college, Xi’an 710062, china beijing medical University, School of Oncology, beijing 100036, china beijing institute of Microbiology and Epidemiology, beijing 100071, china beijing institute of Basic medicine Sciences , beijing 100850, china beijing institute of Biotechnology Beijing China department of Biology Shaanxi Normal College Xi’an China School of Oncology Beijing Medical University Beijing China beijing institute of Microbiology and Epidemiology Beijing China beijing institute of Basic medicine Sciences Beijing China

The α subunit of the stimulatory G protein, Gsα, is involved in the stimulation of adenylate cyclase pathway of signal transduction. The various Gsα mRNAs are generated either by alternative splicing or by using alternative promoter. A novel aberrant splicing of Gsα transcript in human leukemia cell lines is reported. The entire coding region of Gsα gene obtained, referred to as GsαLeu, was amplified by PCR with cDNA from Jurkat human leukemia cDNA library or the reverse-transcribed first strand cDNA from human leukemia cell line HL-60 as a template. The result of DNA sequencing indicated that,compared with originally reported Gsα, GsαLeu has two in-frame deletions, one in amino acid residues 23—249 and the other in amino acid residues 254—260, suggesting that G（sαLeu） may play an important role in leukemia. The complete coding region of GsαLu was inserted downstream of the thrombin site of pGEX-2T fusion protein expression vector and expressed in the form of GST/G(

关键词： Gsa splicing leukemia cloning and expression.

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Overexpression of p27^(KIP1)induced cell cycle arrest in G_1 phase and subsequent apoptosis in HCC-9204 cell line

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World Journal of Gastroenterology 2000年第4期6卷 513-521页

作者： Jiang Li Xin Ke Yang Xin Xin Yu Meng Liang Ge wen Liang wang Jie Zhang Yun de Hou department of Pathology,Fourth Military medical University,Xi’an 710033,Shaanxi Province,china State Key Laboratory for Molecular Virology and Genetic Engineering,beijing 100052,china department of dermatology,beijing Hospital,beijing 100016,china institute of radiation medicine,beijing 100085,china 第四军医大学陕西西安中国预防医学科学院病毒所北京中国预防医学科学院病毒所分子病毒基因工程国家重点实验室北京北京医院北京解放军军事医学科学院放射医学所北京

AIM We have previously reported that inducible over-expresaion of Bak may prolong cell cycle in G1 phase and lead to apoptosis in HCC-9204 cells. This study is to investigate whether p27KIP1 plays an important role in this process. MEHODS In order to elucidate the exact function of p27KIP1 in this process, a zinc inducible p27KIP1 stable transfectant and transient p27KIP1- GFP fusion transfectant were constructed. The effects of inducible p27KIP1 on cell growth, cell cycle arrest and apoptosis were examined in the mock, control pMD vector, and pMD-KIP1 transfected HCC-9204 cells. RESULTS This p27KIP1-GFP transfectant may transiently express the fusion gene. The cell growth was reduced by 35% at 48 h of p27KIP1 induction with zinc treatment as determined by trypan blue exclusion assay. These differences remained the same after 72 h of p27KIP1 expression, p27KIP1 caused cell cycle arrest after 24 h of induction, with 40% increase in G1 population. Prolonged p27KIP1 expression in this cell line induced apoptotic cell death reflected by TUNEL assay. Fourty-eight h and 72 h of p27KIP1 expression showed a characteristic DNA ladder on agarose gel electrophoresis.

关键词： p27^(KIP1) apoptosis cell cycle inducible expression system carcinoma hepatocellular liver neoplasms

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Ginsenoside Rg1 inhibits proliferation of vascular smooth muscle cells stimulated by tumor necrosis factor-α

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Acta Pharmacologica Sinica 2006年第8期27卷 1000-1006页

作者： Zeng-chun MA Yue GAO~2 Yu-guang wang Hong-ling TAN Cheng-rong XIAO Sheng-qi wang institute of radiation medicine Sciences,Academy of Military medical Sciences,beijing 100850,china instituteofradiationmedicineSciences AcademyofMilitaryMedicalSciencesBeijing100850China

Aim:To investigate the proliferation of vascular smooth muscle cells(VSMC)affected by ginsenoside Rg1 and further explore the molecular mechanism ofginsenoside Rg1 using ***:The proliferation of VSMC wasmeasured by MTS assay kit and flow *** alterations were ana-lyzed using two-dimensional electrophoresis and peptide mass *** proteins found in proteomics were confirmed by ***:The proliferation of VSMC was enhanced significantly after tumor necrosis fac-tor-α(TNF-α)treatment,and ginsenoside Rg1 treatment inhibited proliferation ina dose-dependent *** analysis showed 24 protein spots werechanged,including 17 spots that were increased and 7 spots that were *** Rg1 could restore the expression levels of these proteins,at leastpartly,to basic levels of untreated *** expression of G-protein coupledreceptor kinase,protein kinase C(PKC)-ζ,N-ras protein were decreased,whilecycle related protein p21 was increased by ginsenoside Rgl in TNF-α ***:PKC-ζ and p21 pathway might be the mechanism for inhibi-tory effects of ginsenoside Rg1 on proliferation of VSMC.

关键词： cell cycle ginsenoside Rg1 proteomics tumor necrosis factor-α vascular smooth muscle cells

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KAI1 inhibits HGF-induced invasion of pancreatic cancer by sphingosine kinase activity

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Hepatobiliary & Pancreatic Diseases International 2011年第2期10卷 201-208页

作者： Xu Liu,Xiao-Zhong Guo,Wei-Wei Zhang,Zhuo-Zhuang Lu,Qun-Wei Zhang, Hai-Feng Duan and Li-Sheng wang State Key Laboratory of Cancer Biology and institute of Digestive Diseases,Xijing Hospital of Digestive Disease,Fourth Military medical University,Xi’an 710032,china department of Gastroenterology,Shenyang General Hospital of PLA,Shenyang 110016, china department of Experimental Hematology,beijing institute of radiation medicine,beijing 100850,china State Key Laboratory of Cancer Biology Institute of Digestive Diseases Xijing Hospital of Digestive Disease Fourth Military Medical University department of Gastroenterology Shenyang General Hospital of PLA

BACKGROUND:KAI1/CD82 has been reported to attenuate the process of metastases in a variety of tumors;however,its mechanism of action in invasion has not been fully elucidated. The present study aimed to investigate the importance of KAI1 in invasion and its correlation with activation of sphingosine kinase(SPK)in human pancreatic cancer PANC1 and Miapaca-2 cell lines. METHODS:The expression of KAI1 in PANC1 and Miapaca-2 cells,which was mediated by recombinant adenovirus(Ad-KAI1), was assessed by a flow cytometer and Western *** successful infection was established,in vitro growth curve and invasive ability in Boyden Chamber assay were *** presence of KAI1 correlating with c-Met and SPK was detected by co-immunoprecipitation and[γ-32P]ATP incorporation. RESULTS:KAI1 genes had no significant effects on the curve representing cell *** infection with the KAI1 gene,decreased invasive ability in the Boyden Chamber assay was observed in PANC1 and Miapaca-2 cells that were induced by hepatocyte growth ***-expression of KAI1 in the cells led to the deactivation of SPK and a decreased level of intracellular *** correlation was observed between c-Met and KAI1 during co-immunoprecipitation. CONCLUSION:The results of this study for the first time demonstrated a regulatory role for KAI1 in SPK activation, which leads to decreased invasive ability in disease progression of human pancreatic cancer.

关键词： adenovirus vector KAI1 gene sphingosine kinase pancreatic cancer cell lines

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