This article introduces the proteomic study of the cell lines,tissue,pancreatic juice and serum from well-diagnosed patients of pancreatic cancer,benign pancreatic disease,normal control,etc.The highly specific and sensitive biomarkers and their significant roles in the mechanism of development and progress of pancreatic cancer,early diagnosis,therapy monitoring,prognosis,follow-up,and so on,are presented and discussed.

Pancreatic cancer is one of the deadliest cancers of the digestive tract with an obviously increasing incidence around the word in recent years.It is diffcults to diagnosis in the early stage because of the deficience of specific symptoms.Radical resection is the most effective method to treat pancreatic cancer,but those patient often lose radical surgery opportunity when be diagnosised at advanced stages.Their prognosis is poor.Early diagnosis can greatly improve the rates of radical resection and promote the prognosis of the disease,and reliable tumor markers can be used for early screening and early diagnosis for pancreatic cancer.In recent years,the rapidly development of proteomics and its technology makes tumor markers become a popular research fields in pancreatic cancer.

Objective To investigate the relationship between anomalous pancreaticobiliary junction(APBJ) without congenital choledochal cyst (CCC) and onset of acute pancreatitis. Methods Between Jan. 1995 and Jan. 2004, 72 cases of APBJ without CCC were identified by ERCP, MRCP, and intraoperative cholangiography(IOC).Relationship between acute pancreatitis and APBJ was analysed retrospectively. Result The overall incidence of APBJ in this series was 2.7%. Pancreaticobiliary junction anomaly was further substratified into as P-C type(the pancreatic duct joining the common bile duct)in 43 cases, and C-P type (the common bile duct joining the pancreatic duct)in 29 cases. The incidence of acute pancreatitis was 35% and that of gallbladder stone was 74%. Conclusion The incidence of acute pancreatitis in APBJ without CCC is high. In case of relapsing acute pancreatitis without known cause, APBJ should be suspected. Prophylactic cholecystectomy is effective to prevent acute pancreatitis.

Pancreatic cancer is one of the malignant tumor with a high case fatality rate.Because the disease onset symptoms is not obvious,and the disease develops quickly, the malignant degree is high, so it is difficult to do early diagnosis in clinical, leading to poor treatment effect.In recent years, more and more of the discovery and application of pancreatic tumor markers provide a new way for early diagnosis of pancreatic cancer.This article is a review of the current status of the research on the tumor markers associated with the early diagnosis of pancreatic cancer.

Double negative T cells,namely DNT cells,are specific regulatory cells with TCR+ CD3 + CD4-CD8-in cell phenotype,divide into αβ T cell and γδ T cell,play a very important role in regulating immunoreaction.Previous research restricted to the treatment of autoimmune disease and organ transplantation immunity.Recently dnt cells adoptive immunotherapy,as a new anti-tumor method,gradually come into public view.This review mainly focuses on the source of DNT cells,their anti-tumor effect,as well as the possible mechanism.

NKG2D is an activating receptor expressed on various immune cells' surfaces.Currently,eight ligands have been found,they can be divided into two kinds:MHC Ⅰ related protein and ULBP molecules.NKG2D receptors and their respective ligands differentially exist in normal and cancerous tissues.So far,many researchers have found that a lot of immune cells' anti-tumor mechanism is mediated by NKG2D receptor and it can't be replaced in the resistance to the development of carcinoma.adoptive immunotherapy is a new method of treating cancer that propose to find tumor-specific cytotoxicity immune cells and enlarge the amount of it,then injected into human body to resist tumor.Recently,many researchers have found that DNT cells (CD4-CD8-T 细胞)have the function of anti-tumor;sadly its mechanisms are unclear.After the summary of NKG2D receptor-mediated pathway of destruction,this paper try to analyze its relevance to DNT cells' killing effect,on the purpose of finding the Killing mechanism of DNT cells that may existed.

Immune system is the autologous defense system for people to resist disease. Immunotherapy stimulates the immune system to resist disease, including treatment with immunocyte and vaccine. In recent years, the prognosis and survival quality of tumour patients have been greatly improved through cell immunotherapy by immunoregulation and killing directly on tumor. Immunotherapy becomes the hotspot in research.The study of DN Treg cell on immunotherapy will be of vital significance.

The proteome is the entire complement of proteins expressed by a genome, cell, tissue or organism,which are all types of proteins expressed by one cell in the specific physiological or pathological states. The study of proteomics not only can help us to understand the general rules of activity of proteins,but also illuminate the pathologic mechanisms of numerous diseases. By proteomic analysis of normal individual and pathological individuals, we can find some disease-specific protein molecules, which not only can be a new target for drug design, but also can be a molecular markers of some diseases especially tumors.

DNT cells(CD4-CD8-double-negative T cells)ale newly discovered immune cells,whose surface ex press neither CD4 nor CD8 molecules.In recent years,the prognosis and survival quality of tumour patient have been greatly improved through cell immunotherapy.Immunocyte can kill the tumour directly Or through immunoregu lation.The study of DNT cells(double-nnegative T cell)on cancer cells will be of vital significance.

In recent years,the prognosis and survival quality of tumour patient would be improved greatly through cell immunotherapy,which becomes the priority scientific research.Immunoeytes can kill the tumour cell directly or through immunoregulation.CD4CD8 double-negative T cells is a newly found subset of T cells whose SUlface express neither CD4 nor CD8.This article mainly introduces the advancement of one subet of DNT cell,DN Tregs,in tumor.