To improve clinical knowledge of Peutz- Jeghers syndrome. Methods. Eight patients with Peutz- Jeghers syndrome from 1984 to 1998 in our hospital were retrospectively reviewed and analyzed in the present study. Result....To improve clinical knowledge of Peutz- Jeghers syndrome. Methods. Eight patients with Peutz- Jeghers syndrome from 1984 to 1998 in our hospital were retrospectively reviewed and analyzed in the present study. Result. The result of this analysis showed that there were 4 patients appeared with family histories of Peutz- Jeghers syndrome. All of the included patients admitted to the hospital with various complications, and eventually received surgical interventions for these complications, among which, 6 of them had intestinal obstructions mostly (5/6) due to small bowel intussusception, and 2 of them suffered with hemafecia. Post- operative recoveries were generally satisfactory with zero mortality. Conclusion. Peutz- Jeghers syndrome is an uncommon digestive dominant hereditary disease. The diagnosis of it with history, symptoms, signs, and proper examinations usually is not difficult. Surgical interventions are necessary once complications occur.展开更多
Background Lung cancer is the leading cause of cancer-related death in China. Mutation analysis reveals that LKB1 inactivation is present in 30% of non-small-cell lung cancer （NSCLC）, indicating its role as a tumor ...Background Lung cancer is the leading cause of cancer-related death in China. Mutation analysis reveals that LKB1 inactivation is present in 30% of non-small-cell lung cancer （NSCLC）, indicating its role as a tumor suppressor. However, the molecular mechanism is still not clear. Our study attempted to establish LKB1 stable knockdown NSCLC cell line, detect alterations in gene expression and identify the genes regulated by LKBI. Methods LKB1 stable knockdown H1299 cell line was established using a lentiviral short hairpin RNA. To identify the knockdown effect, LKB1 mRNA and protein expression level were evaluated with quantitative real-time PCR and Western blotting. We treated the cell lines with 2-deoxyglucose to determine if LKB1 protein function was impacted. Gene microarray analysis was performed to detect the gene expression alterations in LKB1 stable knockdown H1299 cells. Results LKB1 mRNA and protein expression were significantly suppressed in LKB1 stable knockdown H1299 cell line. 2-DG treatment had little impact on the phosphorylation of AMPK, which is the downstream target of LKB1, indicating the loss of function of LKBI. The microarray data showed that LKB1 knockdown resulted in expression alterations of 1243 kinds of genes, including those involved in cell migration, cell proliferation and cell apoptosis. Conclusions The establishment of LKB1 stable knockdown H1299 cell line provides us with a great tool to investigate various genes regulated by LKB1 through microarray. The discovery of cell proliferation and migration-related genes regulated by LKB1 is critical for unraveling molecular mechanisms of LKBI＇s role in the development and metastasis of lung cancer.展开更多
文摘To improve clinical knowledge of Peutz- Jeghers syndrome. Methods. Eight patients with Peutz- Jeghers syndrome from 1984 to 1998 in our hospital were retrospectively reviewed and analyzed in the present study. Result. The result of this analysis showed that there were 4 patients appeared with family histories of Peutz- Jeghers syndrome. All of the included patients admitted to the hospital with various complications, and eventually received surgical interventions for these complications, among which, 6 of them had intestinal obstructions mostly (5/6) due to small bowel intussusception, and 2 of them suffered with hemafecia. Post- operative recoveries were generally satisfactory with zero mortality. Conclusion. Peutz- Jeghers syndrome is an uncommon digestive dominant hereditary disease. The diagnosis of it with history, symptoms, signs, and proper examinations usually is not difficult. Surgical interventions are necessary once complications occur.
基金This study was supported by the grants from the National Natural Science Foundation of China （No.30971307） and Tianjin Natural Science Foundation （No. 10JCYBJC13700）.
文摘Background Lung cancer is the leading cause of cancer-related death in China. Mutation analysis reveals that LKB1 inactivation is present in 30% of non-small-cell lung cancer （NSCLC）, indicating its role as a tumor suppressor. However, the molecular mechanism is still not clear. Our study attempted to establish LKB1 stable knockdown NSCLC cell line, detect alterations in gene expression and identify the genes regulated by LKBI. Methods LKB1 stable knockdown H1299 cell line was established using a lentiviral short hairpin RNA. To identify the knockdown effect, LKB1 mRNA and protein expression level were evaluated with quantitative real-time PCR and Western blotting. We treated the cell lines with 2-deoxyglucose to determine if LKB1 protein function was impacted. Gene microarray analysis was performed to detect the gene expression alterations in LKB1 stable knockdown H1299 cells. Results LKB1 mRNA and protein expression were significantly suppressed in LKB1 stable knockdown H1299 cell line. 2-DG treatment had little impact on the phosphorylation of AMPK, which is the downstream target of LKB1, indicating the loss of function of LKBI. The microarray data showed that LKB1 knockdown resulted in expression alterations of 1243 kinds of genes, including those involved in cell migration, cell proliferation and cell apoptosis. Conclusions The establishment of LKB1 stable knockdown H1299 cell line provides us with a great tool to investigate various genes regulated by LKB1 through microarray. The discovery of cell proliferation and migration-related genes regulated by LKB1 is critical for unraveling molecular mechanisms of LKBI＇s role in the development and metastasis of lung cancer.
