A 61-year-old male from Northeast China presented with a 2-mo history of abdominal distension,pruritus and jaundice.Laboratory testing revealed an elevated serum Ig G4 level.A computed tomography scan showed a typical...A 61-year-old male from Northeast China presented with a 2-mo history of abdominal distension,pruritus and jaundice.Laboratory testing revealed an elevated serum Ig G4 level.A computed tomography scan showed a typical feature of autoimmune pancreatitis(AIP) and cholecystocholangitis.Early gastric cancer was incidentally discovered when endoscopic untrasound-guided fine needle aspiration(EUSFNA) of the pancreas was carried out.The patient underwent radical subtotal gastrectomy for gastric cancer combined with cholecystectomy.Helicobacter pylori(H.pylori) and Ig G4-positive plasmacytes were detected in gastric cancer tissue,pancreatic EUSFNA sample and resected gallbladder specimen by immunohistochemistry.The patient was diagnosed with H.pylori-positive Ig G4-related AIP and sclerosing cholecystocholangitis as well as H.pylori-positive gastric cancer.He responded well to steroid therapy and remains healthy with no signs of recurrence at one year follow-up.We speculate that H.pylori might act as a trigger via direct or indirect action in the initiation of onset of gastric cancer and multiorgan Ig G4-related disease.展开更多
Objective: Currently, no satisfactory targets for colorectal cancer or markers for immunotherapy and diagnosis and prognosis are available. Immunoglobulin G(Ig G) is widely expressed in many cancers, and it promotes c...Objective: Currently, no satisfactory targets for colorectal cancer or markers for immunotherapy and diagnosis and prognosis are available. Immunoglobulin G(Ig G) is widely expressed in many cancers, and it promotes cancer progression. This study explored the role of cancer-derived Ig G(CIg G) in colorectal cancer.Methods: First, using a monoclonal antibody to CIg G, we examined the expression levels of CIg G in colorectal cancer cell lines by western blot and immunofluorescence analyses and in tissue specimens by immunohistochemistry. Second, the variable region gene was amplified by nested polymerase chain reaction(PCR), and PCR products were sequenced and analyzed. Third, we investigated the effect of CIg G on colorectal cancer cells by cell proliferation, wound healing, migration and invasion assays, and colony formation assay. Fourth, we performed in vivo tumorigenicity experiments to explore the effect of CIg G on tumorigenicity. Finally, we used RNA-seq analysis and co-immunoprecipitation experiments to further clarify possible mechanisms of CIg G.Results: We found that CIg G is widely expressed in colorectal cancer cells, and the overexpression of CIg G indicates significantly poor colorectal cancer prognosis. Furthermore, CIg G knockdown significantly inhibits the proliferation, migration and invasion ability of cells, and tumor growth in vivo. RNA-seq analysis indicated that CIg G knockdown results primarily in changes in expression of apical junction and epithelial-mesenchymal transition-related genes. CIg G may be involved in colorectal cancer invasion and metastasis through interacting with E-cadherin.Conclusions: CIg G is a potential human oncogene in colorectal cancer and that it has potential for application as a novel target in targeted therapy and a marker for prognostic evaluation.展开更多
基金Supported by National Natural Scientific Foundation of China(to Gao RP),No.81070370 and No.81270544
文摘A 61-year-old male from Northeast China presented with a 2-mo history of abdominal distension,pruritus and jaundice.Laboratory testing revealed an elevated serum Ig G4 level.A computed tomography scan showed a typical feature of autoimmune pancreatitis(AIP) and cholecystocholangitis.Early gastric cancer was incidentally discovered when endoscopic untrasound-guided fine needle aspiration(EUSFNA) of the pancreas was carried out.The patient underwent radical subtotal gastrectomy for gastric cancer combined with cholecystectomy.Helicobacter pylori(H.pylori) and Ig G4-positive plasmacytes were detected in gastric cancer tissue,pancreatic EUSFNA sample and resected gallbladder specimen by immunohistochemistry.The patient was diagnosed with H.pylori-positive Ig G4-related AIP and sclerosing cholecystocholangitis as well as H.pylori-positive gastric cancer.He responded well to steroid therapy and remains healthy with no signs of recurrence at one year follow-up.We speculate that H.pylori might act as a trigger via direct or indirect action in the initiation of onset of gastric cancer and multiorgan Ig G4-related disease.
基金supported by grants from the National Natural Science Foundation of China (No. 8157101395)Beijing Natural Science Foundation (No. 7182171)
文摘Objective: Currently, no satisfactory targets for colorectal cancer or markers for immunotherapy and diagnosis and prognosis are available. Immunoglobulin G(Ig G) is widely expressed in many cancers, and it promotes cancer progression. This study explored the role of cancer-derived Ig G(CIg G) in colorectal cancer.Methods: First, using a monoclonal antibody to CIg G, we examined the expression levels of CIg G in colorectal cancer cell lines by western blot and immunofluorescence analyses and in tissue specimens by immunohistochemistry. Second, the variable region gene was amplified by nested polymerase chain reaction(PCR), and PCR products were sequenced and analyzed. Third, we investigated the effect of CIg G on colorectal cancer cells by cell proliferation, wound healing, migration and invasion assays, and colony formation assay. Fourth, we performed in vivo tumorigenicity experiments to explore the effect of CIg G on tumorigenicity. Finally, we used RNA-seq analysis and co-immunoprecipitation experiments to further clarify possible mechanisms of CIg G.Results: We found that CIg G is widely expressed in colorectal cancer cells, and the overexpression of CIg G indicates significantly poor colorectal cancer prognosis. Furthermore, CIg G knockdown significantly inhibits the proliferation, migration and invasion ability of cells, and tumor growth in vivo. RNA-seq analysis indicated that CIg G knockdown results primarily in changes in expression of apical junction and epithelial-mesenchymal transition-related genes. CIg G may be involved in colorectal cancer invasion and metastasis through interacting with E-cadherin.Conclusions: CIg G is a potential human oncogene in colorectal cancer and that it has potential for application as a novel target in targeted therapy and a marker for prognostic evaluation.
