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    08 November 2012, Volume 39 Issue 11 Previous IssueNext Issue
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    Biological function of long non-coding RNAs in human malignant neoplasms
    LIU Chang, JIAO Yang
    2012, 39 (11): 803-805.
    Abstract( 593) PDF(1074KB) ( 2342) Save
    Long non-coding RNAs(LncRNAs) refer to such a kind of RNAs which possess none or very few open reading frames, thus could only encode none or little protein. Recent studies suggest that LncRNAs tissue- specially expressed in several human cancers,and might play a key role in the diagnosis and prognostic of these malignant neoplasms.
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    Esophageal cancer related gene 4 in tumor
    HONG Chao-Qun, YOU Yan-Jie, HUANG Ji-Hong
    2012, 39 (11): 806-808.
    Abstract( 604) PDF(959KB) ( 1868) Save
    Esophageal cancer related gene 4 (ECRG4) serves as a tumor suppressor gene through interacting with NF-κB and p53 pathways. Multiple studies have demonstrated that the down-regulated expression of ECRG4 occurs in a variety of cancer types, indicating a potential application of ECRG4 as a molecular diagnostic marker as well as a therapeutic target
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    Circulating endothelial cells in clinical oncology
    XIONG Ming, QIAO Yuan-Yuan
    2012, 39 (11): 808-811.
    Abstract( 719) PDF(1103KB) ( 1502) Save
    Circulating endothelial cells(CECs)are mature endothelial cells, which have been shed from the vascular cell lining and enter into blood circulation. Rare in healthy individuals, increased CECs in peripheral blood reflects significant vascular damage and dysfunction. Increased CECs have been documented in many human diseasescharacterized as vascular damage, including different types of tumors. Clinical data suggest that CECs count is a promising tool for monitoring disease activity with potential to assess tumor prognosis and response to treatment.
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    Formation of hypoxic microenvironment of cancer stem cells and its role in tumor metastasis
    WANG Hong-Hai, LI Lian-Hong
    2012, 39 (11): 812-814.
    Abstract( 843) PDF(959KB) ( 2313) Save
    Cancer stem cells located in specific microenvironment, that play an important role in the proliferation and metastasis of tumor cells. Hypoxia is one of the important features of tumor tissue microenvironment. A series of studies results show that the hypoxic microenvironment of tumor stem cells could promote tumor metastasis, which provides new clues for understanding tumor pathogenesis and tumors treatment.
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    Ezrin protein in tumor metastasis associated signaling pathways
    XI Mei-Li, LU Xin
    2012, 39 (11): 815-817.
    Abstract( 792) PDF(961KB) ( 2124) Save
    Ezrin protein plays an important role in morphogenesis, motility, adhesion. Moreover, Ezrin protein participates in multiple steps of the process of tumor invasion and metastasis. In the progress of tumor metastasis, Ezrin protein is related to several signaling pathways such as Rho mediated signaling pathways, hepatocyte growth factor (HGF) pathways, Fas mediated cell apoptosis signaling pathways, phosphatidyl inositol 3-kinase (PI3K)-Akt pathways, and in which it plays different regulatory role.
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    Cullin1 and malignant tumors
    WANG Wei-Min, DENG Jian-Liang, ZHOU Yan
    2012, 39 (11): 818-820.
    Abstract( 965) PDF(960KB) ( 1728) Save
    Cullin1 is a member of the cullin genome. The cullin1 assembly complex has typical ubiquitin ligase activity, and mediates cell cycle proteins, especially cancer-associated protein degradation process, an then effectively regulates the cell cycle progression. Cullin1 play an important role in the genesis and development of malignant tumors.
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    MMP-2 and MMP-9 in malignant tumor
    ZHANG Ming-Ming, XU Yu-Qing
    2012, 39 (11): 820-823.
    Abstract( 1027) PDF(1089KB) ( 2444) Save
    Matrix metalloproteinase-2 (MMP-2) and matrix metalloproteinase-9 (MMP-9) are gelatinases of matrix metalloproteinase family, which play a crucial role in the cancer cell growth, differentiation, invasion, migration, the regulation of tumour angiogenesis and immune surveillance because of their ability to degrade extracellular matrix proteins.So they are significantly associated with development and progression of various tumors. In recent years, the inhibitors and drugs against MMP-2 and MMP-9 arouse wide concern.
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    Pirh2 and tumor
    WU Xiao-Rong, LIU Dong-Ming
    2012, 39 (11): 824-826.
    Abstract( 684) PDF(1107KB) ( 1664) Save
    Pirh2 (p53-induced protein with a Ring-H2 domain), one of the ubiquitin-protein E3 ligases, can promote p53 degradation via ubiquitin-proteasome pathway, and repress the biological functions of p53. Researchers have found that the Pirh2 is overexpressed in many cancers, which suggests Pirh2 is probably correlated with tumorigenesis and cancer development, and it may become a promising cancer therapeutic target.
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    Wnt signaling pathway and tumor
    GU Juan, WANG Xue-Dong, PAN Zhao-Lin, HUANG Li-Hua
    2012, 39 (11): 827-830.
    Abstract( 902) PDF(1087KB) ( 2519) Save
    Wnt signaling pathway is not only closely related to tumor invasion and metastasis, such as cancer cells migration and adhesion, extracellular matrix degradation, and angiogenesis, but also plays an important role in self-renewal, proliferation and differentiation of tumor stem cells. Progress has been made in high specific genes drug development and targeted therapy against the Wnt signaling pathway.
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    Expression of HLA-G in serum and tissue of cancer patients and its function in tumor immune escape
    LIU Wei, LING Zhi-Qiang, MAO Wei-Min
    2012, 39 (11): 831-833.
    Abstract( 657) PDF(958KB) ( 1621) Save
    With depth understanding of the mechanism of HLA-G protein, more and more studies have found that HLA-G is closely related with tumor immunity. Numerous studies have shown that the expression of HLA-G protein and mRNA could be detected in patients with cancer.
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    Research progress of TLR9 inherent signaling pathways in the tumor cells
    FEI Guang-Ru, REN Tao
    2012, 39 (11): 834-837.
    Abstract( 784) PDF(1110KB) ( 2116) Save
    Specific activation of toll-Like Receptor 9 (TLR9) by ligand CpG DNA/ODN can initiate downstream signaling. The activation of TLR9 signaling is regulated by Granulin, high-mobility group box-1 (HMGB1) and soluble TLR9. Interestingly, TLR9 is no longer only presented in the immune cells, but also expressed in many kinds of tumor cells. TLR9 is involved inmaintaining and promoting the malignant biological behaviors of tumor cells. Elucidation of the function of TLR9 inherent signaling pathways in the tumor cells will provide a novel idea for oncotherapy.
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    Poly ADP-ribose polymerase inhibitors in cancer therapy
    MA Qiang, HAO Ji-Qing
    2012, 39 (11): 837-839.
    Abstract( 690) PDF(961KB) ( 1947) Save
    Poly ADP ribose polymerases (PARP) play an important role in DNA damage repair and genome stability. So, PARP inhibitors can inhibit the DNA damage repairing of tumor cells and enhance the sensitivity of the DNA of tumor cells to damage factors. In recent years, PARP inhibitors have been more and more concerned. PARP inhibitors can kill tumor cells with certain genetic mutations alone by synthetic lethal effect. In addition, PARP inhibitors in combination with chemotherapy or radiotherapy can increase the sensitivity of tumor cells to the chemotherapy or radiotherapy. PARP inhibitors are expected to play an important role in cancer therapy.
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    Applications of nucleic acid aptamers in cancer diagnosis and treatment
    LI Ye, CAO Hong-Yong, YUAN Ai-Hua, MIAO Yi
    2012, 39 (11): 840-843.
    Abstract( 677) PDF(1090KB) ( 2174) Save
    Due to their small molecular weight, strong penetrating power, wide target range, strong ability of binding targets, stable quality, little immunogenicity, easiness to be synthesized and modified, and functional roles in molecular recognition and signal transduction, nucleic acid aptamers are now used as tools for molecular recognition and drugs delivery for the diagnosis and treatment of many diseases.
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    Anti-tumor effect of metformin in breast cancer
    JIANG Bei-Qi, ZHUANG Zhi-Gang
    2012, 39 (11): 844-847.
    Abstract( 710) PDF(1088KB) ( 2117) Save
    Recent preclinical data have demonstrated thatantidiabetic drug metformin can act as an anticancer agent for breast cancer. Epidemiologic evidences show that metformin decreases the incidence of breast cancer and cancer-related mortality in diabetic patients. The metformin treatment also increases complete pathological tumor response rates following neoadjuvant chemotherapy for breast cancer patients. Metformin also displays significant growth inhibitory effects in most types of breast cancer cell lines and tumor xenografts in mice. Preclinical data also shows metformin combined with chemotherapy drugs or HER2-targeted drugs or new anticancer drugs has synergic anti-cancer effect. Reduction of the insulin/insulin-like growth factor signaling pathway in body and activation of LKB1/AMPK and inhibition of downstream mTOR pathway in tumor cells have been found to play the most important role in anti-cancer effect of metformin. Currently, a number of clinical trials are underway in breast cancer patients to evaluate the effective use value of metformin as a cancer therapy.
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    EML4-ALK fusion gene in non-small cell lung cancer
    WANG Meng, YANG Ji-Yuan
    2012, 39 (11): 848-850.
    Abstract( 657) PDF(964KB) ( 1906) Save
    EML4-ALK fusion oncogene represents a new molecular target which appears mainly in lung adenocarcinoma. EML4-ALK is detected more frequently in young non-small-cell lung cancer patients who never or light smoke. ALK inhibitors(crizotinib)for the treatment of the EML4-ALK-positive non-small cell lung cancer has a high response rate. This finding can improve the individual treatment of non-small cell lung cancer.
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    Targeted therapy for elderly patients with non-small cell lung cancer
    ZHANG Hui, ZHANG Shu-Cai
    2012, 39 (11): 851-854.
    Abstract( 646) PDF(1148KB) ( 1511) Save
    In recent years, the incidence and mortality of advanced lung cancer in elderly patients have been increasing, but the number of elderly patients with lung cancer who receive active treatment is less than that of lung caner patients in other age stage. Molecular targeted therapies, such as the human epidermal growth factor tyrosine kinase inhibitors, angiogenesis inhibitors, anti-tumor monoclonal antibodies and multi-target drugs, have prolonged the overall survival and improved the life quality of elderly patients with advanced non-small cell lung cancer. Targeted therapy has become the most promising treatment and can significantly improve the prognosis of elderly patients.
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    mTOR signalling pathway and gastric carcinoma
    HUANG Guang-Yan, SHI Liang-Hui
    2012, 39 (11): 854-857.
    Abstract( 608) PDF(1088KB) ( 1581) Save
    Aberrations of the mammalian target of rapamycin (mTOR) signaling are frequently observed in many types of cancer. Activation of mTOR regulates tumor cell proliferation, survival and metastasis,and then results tumorigenesis and tumor developmet,Blocking the mTOR signaling pathway by rapamycin and its derivatives can inhibit gastric cancer cell growth and promote tumor necrosis and such effects can be synergistically improved by combined use of other chemotherapeutic agents.Thus,rapamyein and its derivatives may be effective in the prevention and treatment of gastric cancer.
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    Gastrin and miRNA in the development of colorectal neoplasms
    CHENG Teng, WU Pei, MAO Jia-Ding
    2012, 39 (11): 857-860.
    Abstract( 723) PDF(1089KB) ( 1386) Save
    It has been reported that the high expression of gastrins and their receptors promotes some colorectal neoplasms cells proliferation and inhibit apoptosis. MicroRNAs(miRNAs) are closely related to gene expression regulation in colorectal neoplasms. Researches show that miRNAs have multiple intersections in the regulatory network of colorectal neoplasms with the signal transduction pathway of gatrins which controls the proliferation of colorectal neoplasms. Gastrins perhaps control the proliferation of colorectal neoplasms cells through miRNA signal transduction pathways. These findings have greatly expanded the understanding of the pathogenesis of colorectal neoplasms and will provide new ideas and methods for the diagnosis and treatment of colorectal neoplasms.
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    Progress in surgical treatment of colon cancer
    ZHANG Xiu-Wen, ZHANG Yi-Sheng
    2012, 39 (11): 861-863.
    Abstract( 569) PDF(960KB) ( 2053) Save
    In recent years, some aspects of the standardized resection of colon cancer, metastases, recurrent tumor therapy and laparoscopic applications have new concepts. In particular, the view of complete mesocolic excision(CME) is more scientific and effective from the level of embryonic development and anatomy, which lays the foundation for controlling the quality of colon surgery.
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    Concurrent chemoradiotherapy and adjuvant chemotherapy for rectal cancer
    CHEN Jie, TAO Zhen, WANG Ping
    2012, 39 (11): 864-866.
    Abstract( 634) PDF(960KB) ( 1613) Save
    Adjuvant and neoadjuvant therapy are the important therapeutic methods for rectal cancer. Neoadjuvant concurrent chemoradiotherapy and postoperative adjuvant chemotherapy play a crutial role in rectal cancer treatment. New chemotherapy drugs and targeted therapy drugs could further improve the therapeutic effect of rectal cancer.
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    microRNA in pancreatic cancer invasive metastasis
    LI Pei, WANG Zheng
    2012, 39 (11): 867-869.
    Abstract( 730) PDF(959KB) ( 1323) Save
    Pancreatic cancer has a strong ability of invasive and metastasis, and the mechanism is still not completely clear. It has been demonstrated that aberrant expression of microRNAs(miRNA) is closely associated with the occurrence, development and metastasis of pancreatic cancer.The reveal of miRNA mechanism related to the metastasis of pancreatic cancer would provide a new approach to the treatment of pancreatic cancer.
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    S100 proteins and prostate cancer
    XUE Yi, LIU Yun
    2012, 39 (11): 870-872.
    Abstract( 768) PDF(958KB) ( 1762) Save
    The S100 proteins are a multi-gene calcium-binding family, which are differently expressed in a variety of tumors. It is found to be associated with tumor invasion and metastasis. As a tumor-associated biomarkers, unraveling the relationship between S100 and prostate cancer progression as well as molecular mechanisms, would provide an important basis for the clinical diagnosis and therapeutic monitoring.
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    Study on molecular regulation mechanism of VEGF in HL-60 cells after induced differentiation
    LI Yan-Mei, SONG Guan-Hua, WEN Pei-E, REN Xia, BI Ke-Hong, JIANG Guo-Sheng
    2012, 39 (11): 873-877.
    Abstract( 634) PDF(1675KB) ( 1588) Save
    Objective To study the molecular regulation mechanism of VEGF in the model of ATRA induced differentiation in HL-60 cells, and to provide new targets for leukemia anti-angiogenic therapy. Methods The morphology was observed by Wright-Gimesa staining; HL-60 cells differentiation was detected by NBT reduction experiment. VEGF,STAT3,c-myc mRNAs were measured by reverse transcription-PCR; VEGF,STAT3 and c-myc proteins were determined by Western blot. Results The proliferation of HL-60 cells was inhibited obviously by ATRA(1 μmol/L) with the induction of differentiation, NBT positive rate was 82.59% ( t=﹣24.157, P <0.01); VEGF mRNA( t=7.339, P<0.05), STAT3 mRNA ( t=3.667, P<0.05) and c-myc mRNA( t=6.858, P<0.05) were all down-regulated. VEGF protein( t=3.386, P<0.05), STAT3 protein( t=4.074, P<0.05)and c-myc protein ( t=3.333, P<0.05)were all down-regulated. Conclusion VEGF expression level is reduced with the procession of differentiation of HL-60 cells, which may be largely correlated with the down regulation of STAT3 and c-myc.
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