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Research progress of the relationship between TRAP1 and malignant tumor

Practical Oncology Journal.2017;31(4):371-375. doi:10.11904/j.issn.1002-3070.2017.04.016

Tumor necrosis factor receptor-associated protein 1(TRAP1),also known as HSP75,is a molecular chaperone protein of heat shock protein 90(HSP90)which can be expressed in a variety of human malignant tumor cells.TRAP1 is involved in cell apoptosis,metabolism,intercellular adhesion,movement,invasion and metastasis,and is associated with tumor cell resistance.The latest studies have demonstrated that abnormal expression of TRAP1 was found in the development process of breast cancer,colon cancer,ovarian cancer and other tumors.Further studies have confirmed that TRAP1 plays a key role in the regulation of energy metabolism in tumor cells,by blocking its function can lead to the death of tumor cells,and will not affect the normal cells.As a new target for tumor therapy,TRAP1 is receiving more and more attention.

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Research progress of tumor-associated neutrophils

Qi QIN ; Yang XU ; Hong ZHAO

Practical Oncology Journal.2017;31(4):367-370. doi:10.11904/j.issn.1002-3070.2017.04.015

Tumor growth depends on the tumor microenvironment(TME).Tumor-associated neutrophils(TANs)are important inflammatory cells in TME.TANs are divided intoN1type with anti-tumor effect andN2type of tumor-promoting effect.Therefore,TANs have both beneficial and harmful aspects of the body.A large number of studies have been shown that TANs affect tumor formation,metastasis,angiogenesis and immune response,regulated by the secretion of cytokines and chemokines.This review will summarize the biological characteristics of TANs,and tumor development,prognosis and treatment of tumor as well as research progress of the relationship between TANs and tumor.

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Research progress of CTGF/CCN2 in the development and targeted therapy of malignant tumor

Yuqi SUN

Practical Oncology Journal.2017;31(4):363-366. doi:10.11904/j.issn.1002-3070.2017.04.014

The current incidence of malignant tumors is increasing.Although we have been exploring the mechanism of tumor development and its treatment,its efficacy is little.Malignant tumor development mechanism is very complex,and a variety of proteins and genes involved.Connective tissue growth factor(CTGF,also known as CCN2)is a secreted protein,a member of the CCN family,which plays a very important role in the development and progression of tumors.This article summarizes the structure and function of CTGF /CCN2 protein,the mechanism of action in the development of malignant tumors and the latest research progress in targeted therapy.

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Research progress of CST1 gene in tumor

Yifeng CUI ; Ruipeng SONG ; Xiao GUO

Practical Oncology Journal.2017;31(4):359-362. doi:10.11904/j.issn.1002-3070.2017.04.013

Cystatin Cystatin(CST)is a class of proteins that inhibit cysteine proteases and are widely distributed in human body fluid and secretion.The present study shows that the CST superfamily is closely related to the tumor,in which the cysteine protease inhibitor SN is the product expressed by the CST1 gene and is abnormal expression in various tumors.However,its occurrence and development of tumor as well as effects of invasion and metastasis on the specific mechanism is not yet clear.In this paper,we retrospectively analyze the related studies in recent years and review the progress of CST1 gene in tumor.

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Advances in drug resistance mechanism of immunological checkpoint inhibitors and post-drug resistant therapeutic strategy

Yulan ZENG ; Yangyang LIU ; Jinyan LIANG ; Feifei GU

Practical Oncology Journal.2017;31(4):353-358. doi:10.11904/j.issn.1002-3070.2017.04.012

Immune-checkpoint blockers(ICBs)have been well received in a variety of tumors,and the quality of patient life has improved significantly.However,the reasons why not all patients treated with ICBs benefit from lesion control,symptom improvement,and survival time.Many patients are resistant to the first time when they have been using ICBs for a period of time.This is a clinical challenge.This review lists possible causes of primary drug resistance and acquired resistance to ICBs.The primary resistance is associated with several mechanisms,including tumor microenvironment,cancer cells themselves and other related factors.The acquired resistance includes nonclassical immunoprecipitation molecules secondary overexpression,abnormalities of antigen presenting signal pathway and dysfunction of T cell activation killer.Finally,we have described a variety of possible new combination of treatment,including combined radiotherapy and chemotherapy,and combined targeted therapy with other measures.

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Expression of polycomb protein SUZ12 predicts poor prognosis and response of patients with intrahepatic cholangiocarcinoma to adjuvant gemcitabine-based chemotherapy

Nan LIU ; Zhiyang HAN ; Pengtian LU ; Danyang LI ; Yingwei WANG ; Xianghui DONG ; Hong ZHU

Practical Oncology Journal.2017;31(4):321-328. doi:10.11904/j.issn.1002-3070.2017.04.007

Objective This study explored the expression of polyclonal protein SUZ12 in patients with intrahepatic cholangiocarcinoma(ICC),and its role in predicting the survival and treatment of ICC patients.Methods The expression of SUZ12 and p16INK4a was detected by immunohistochemical assay in 207 liver tissue samples including ICC patients,BilIN-1,-2,-3 and non-tumor-like cholangiocarcinoma.The expression of these proteins was assessed to be related to the pathological characteristics of the ICC patients receiving chemotherapy and the outcome of survival as well as the subsequent chemotherapy response.Results The expression level of SUZ12 was gradually increased from non-neoplastic bile duct tissue to BilIN-1,-2,-3 and ICC.The expression of p16INK4a protein was expressed in non-neoplastic-like cholangiocarcinoma,but it decreased gradually in BilIN-1,-2,-3 and ICC tissues.SUZ12 expression was associated with undifferentiated ICC,lymph node metastasis and advanced cancer.Kaplan-Meier curve analysis showed that ICC patients with high expression of SUZ12 had a significant reduction in overall survival and disease-free survival in comparison with ICC patients with the low expression of SUZ12.SUZ12 expression was significantly associated with overall survival of patients receiving adjuvant gemcitabine-based chemotherapy(AGC).Conclusion SUZ12 expression is able to predict the overall survival and disease-free survival of ICC patients with adjuvant gemcitabine-based chemotherapy.

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AEG-1 promotes metastasis of breast cancer MCF-7 cells

Yinghong LI ; Junjun LIU ; Xiaoming NING ; Cong LI ; Lejing LI

Practical Oncology Journal.2017;31(4):299-304. doi:10.11904/j.issn.1002-3070.2017.04.003

Objective The objective of this study was to observe the effect of AEG-1 gene on the metastasis in breast cancer MCF-7 cells.Methods AEG-1 siRNAs were transfected into MCF-7 cells to silence AEG-1 expression,and negative siRNA was used as a control.Transwell chamber was used to detect the ability of cell migration and invasion of MCF-7 cells.CCK8 assay was used to detect the cell proliferation of MCF-7 cells.At the same time,the effect of VEGF on the angiogenesis was investigated by detecting the changes of lumen formation in HUVEC cells.Results The migration,invasive and proliferative abilities were significantly inhibited in MCF-7 cells transfected with AEG-1 siRNA.Knockdown AEG-1 was significantly decreased the level of VEGF in the supernatant of MCF-7 cells.Knockdown AEG-1 was also significantly inhibited the angiogenesis activity in HUVEC cells.Conclusion Knockdown AEG-1 can significantly inhibit the migration of MCF-7 cells,including cell migration,invasion,proliferation and angiogenesis.These results suggest that AEG-1 plays an important role in the metastasis process of breast cancer and opens up new ideas for future treatment breast cancer.

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Expression and clinical significance of small fragments of P28 and P43 in papillary thyroid carcinoma after TRa1 gene transcription

Shiliang LI ; Lei XU ; Guoan SHAO ; Fenfen SUN ; Linyong SUN ; Jun XUE

Practical Oncology Journal.2017;31(4):294-298. doi:10.11904/j.issn.1002-3070.2017.04.002

Objective The objective of this study was to investigate the expression of P28 and P43 in papillary thyroid carcinoma(PTC)and its relationship with clinicopathological features after TRa1 gene transcription.Methods Real-time fluorescence quantitative PCR(RT-PCR)and gel electrophoresis were used to determine the target fragments and to isolate the bands of different fragments.The optical density of each band was scanned by UV transmittance analyzer to detect 31 cases of PTC tissue and expression levels of P28 and P43 in para-cancerous tissues.Results The average gray value of P28 in thyroid carcinoma group was 0.77±0.34,which was significantly higher than that in para-cancer group(0.31±0.18).The average gray value of P43(0.85+0.21)in thyroid carcinoma group was significantly higher than that in para-cancer group(0.34±0.15)(P<0.05).The expression levels of P28 were not correlated with gender,age,tumor size,lymph node metastasis and clinical pathologic stage(P>0.05),The expression levels of P43 were not correlated with gender,age,tumor size and lymph node metastasis.(P>0.05)but they were related to clinical pathologic stage(P<0.05).There was no correlation between expression levels of P28 and P43(r=0.266,P=0.071).Conclusion The increased expression of P28 and P43 may have a high degree of malignancy and a certain clinical value in predicting the adverse prognosis of PTC.Both factors are helpful for the prevention and treatment of PTC.

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Research progress of ALCAM in gynecological malignant tumors

Mingjuan HUO ; Xiangcheng MENG ; Ying SUN

Practical Oncology Journal.2017;31(4):381-384. doi:10.11904/j.issn.1002-3070.2017.04.018

Activated leukocyte cell adhesion(ALCAM),also known as CD166/MEMD,is a transmembrane glycoprotein,which belongs to one of the members of the immunoglobulin superfamily and is one of cell adhesion molecules.In vivo,ALCAM is divided into three subtypes including membrane ALCAM,cytoplasmic ALCAM and soluble ALCAM,which mediate a variety of pathophysiological processes involved in the body by regulating cell-to-cell tropism or heterophonic adhesion.The abnormal expression of ALCAM is closely related to the invasion and metastasis of various tumor cells,and has a certain effect on the sensitivity of radiotherapy and chemotherapy.The article reviews the latest advances in ALCAM of gynecological malignancies.

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Research progress of MSI colorectal cancer

Yue MA

Practical Oncology Journal.2017;31(4):376-380. doi:10.11904/j.issn.1002-3070.2017.04.017

Colorectal cancer is one of the most common malignant tumors,with the improvement of living standards and eating habits of Westernization.The incidence and mortality of colorectal cancer are on the rise in China.The development of colorectal cancer is a multi-step,multi-gene involved in the process.At present,chromosome instability(CIN)and microsatellite instability(MSI)are considered to be the main genetic pathways in colorectal cancer.This article reviews research progress of MSI colorectal cancer in clinical pathology and molecular characteristics.

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