Specific expression of ZO-1 and N-cadherin in rosette structures of various tumors: possible recapitulation of neural tube formation in embryogenesis and utility as a potentially novel immunohistochemical marker of rosette formation in pulmonary neuroendocrine tumors.

Neuroendocrine tumors can develop in various organs. All of these tumors are designated on the basis of their morphologic characteristics evident by light microscopy, and by immunohistochemistry for antigens such as synaptophysin, chromogranin-A, and CD56/NCAM. In the present study, we attempted to demonstrate the localization of Zonula occludens-1 (ZO-1) and N-cadherin in rosette structures of neuroendocrine tumors using immunohistochemistry and to clarify their specific distribution in rosettes in human pulmonary neuroendocrine tumors in comparison with various types of adenocarcinoma.

Analysis of differentially expressed genes in neuroendocrine carcinomas of the lung.

Introduction: Large cell neuroendocrine carcinoma (LCNEC) and small cell lung carcinoma (SCLC) show considerable differences in their histology but share neuroendocrine (NE) characteristics and also genetic and/or expression patterns.

Methods: We used the subtractive expression method to identify differences in gene expression that would allow discrimination between these two types of NE lung carcinoma.

Results: Eight cDNA fragments were transcribed at a higher level in LCNEC compared with SCLC, and these corresponded to five mitochondrial genes, two ribosomal genes, and one fetal regulation factor, neuronatin (NNAT).

Renal graft loss with plasma cell-rich acute rejection in cadaveric renal transplantation: a case report.

We reported a case of renal graft loss in cadaveric renal transplantation. An episode biopsy with renal dysfunction showed plasma cell predominant inflammatory infiltration in the interstitium without a finding of vascular or glomerular rejection, and was diagnosed as plasma cell-rich acute rejection (PCAR). Despite intensive immunosuppressive therapy, the renal histology of repeated biopsies showed persistent plasma cell infiltration and the graft was finally lost.

Phenotypic differences of proliferating fibroblasts in the stroma of lung adenocarcinoma and normal bronchus tissue.

Fibroblasts in tumor tissue are thought to interact with tumor cells directly and/or indirectly and to have important roles in tumor invasion and metastasis. To characterize the phenotype of proliferating fibroblasts in pulmonary adenocarcinoma, we established short-term fibroblast cell lines from both normal bronchus and adenocarcinoma tissues obtained from the same patients and compared the gene expression profiles. Four sets of fibroblast cell lines (eight cell lines in total) were used in the analysis.