Toshiaki Sano

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Context: Crooke's cell adenoma (CCA), characterized by massive Crooke's hyaline change in corticotroph adenoma, causes a rare subtype of Cushing's disease. In contrast to ordinary corticotroph adenomas, CCAs are generally aggressive and present as invasive macroadenomas, which are refractory to both surgery and radiotherapy and have a high recurrence rate.(More)
OBJECTIVE The aims of this study are to review the histology of the clinically nonfunctioning pituitary adenomas (CNFPAs) we have observed and to determine whether or not the frequency of cavernous sinus invasion is different among each type of morphology. METHODS In addition, several proliferative markers, including Ki67, p53, E-cadherin, matrix(More)
We generated the homozygous transgenic mice with expression of the active form of TGF-beta1 by the glucagon promoter (homozygous NOD-TGF-beta1). The homozygous NOD-TGF-beta1 showed severe diabetes in 84.6%, impaired glucose tolerance, and low serum insulin levels. The final size of endocrine and whole pancreas decreased, respectively, to 6 and 34%, compared(More)
BACKGROUND Krüppel-like zinc-finger transcription factor 5 (KLF5), known as BTEB2 and IKLF, has several biological functions that involve cell proliferation, development, and apoptosis. In human cerebral aneurysms, macrophage infiltration is profoundly associated with growth and rupture, but the role of KLF5 remains unclear. We examined the significance of(More)
In the current study, to elucidate the molecular basis of cell type-specific expression of the GH-secretagogue/ghrelin receptor type 1A (GHSR1A), we characterized the structure and putative promoter region of the rat Ghsr gene. We identified an alternative 5'-untranslated first exon that contains multiple transcription start sites, and confirmed a 200-bp(More)
A 52-year-old woman experienced sudden onset of double vision due to a right abducens nerve palsy and was diagnosed as having a pituitary macroadenoma that invaded into the right cavernous sinus. Otherwise, she was asymptomatic despite marked elevation of ACTH (293 pg/ml) and cortisol (24.6 μg/dl) levels. The patient underwent transsphenoidal surgery(More)
Chordomas are thought to be tumors originating from notochord remnants characterized histologically by cohesive cells with epithelial features and by immunohistochemical expression of epithelial markers. To investigate the expression and distribution of cell adhesion molecules in chordomas, we immunohistochemically studied the expression of representative(More)