Publications by authors named "Nami O Yamada"

Adenomatous polyposis coli (APC) is recognized as an antioncogene related to familial adenomatous polyposis and colorectal cancers. However, APC is a large protein with multiple binding partners, indicating APC has diverse roles besides as a tumor suppressor. We have ever studied the roles of APC by using APC (APC1638T) mice.

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In minimal change nephrotic syndrome, podocyte vesicle transport is enhanced. Adenomatous polyposis coli (APC) anchors microtubules to cell membranes and plays an important role in vesicle transport. To clarify the role of APC in vesicle transport in podocytes, nephrotic syndrome was induced by puromycin amino nucleoside (PAN) injection in mice expressing APC1638T lacking the C-terminal of microtubule-binding site (APC1638T mouse); this was examined in renal tissue changes.

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Recent studies have found that microRNAs (miRNAs) are present in body fluids, including blood, cerebrospinal fluid, tears, saliva, breast milk, and urine in a stable form, and are called circulating miRNAs. Although their biological roles remain to be determined, circulating miRNAs are considered as mediators of intercellular communication like hormones and cytokines. Because circulating miRNAs can be collected in a non-invasive manner called as "liquid biopsy", they have also been studied as potential biomarkers for early detection, evaluation of therapeutic effects, and prediction of prognosis in various diseases, including cancers.

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Adenomatous polyposis coli (APC), a well-known anti-oncogene, is considered to have multiple functions through its several binding domains. We have continuingly studied APC mice (APC1638T mice) to elucidate the functions of APC other than tumor suppression. A distinctive feature of the APC1638T mice is they are tumor free and live as long as APC mice (WT mice).

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In the present study, we examined morphology and function of hippocampus in the APC mouse. Expression levels of the APC mRNA and protein were both identical in the hippocampus of the APC and APC mice. The dentate gyrus of the APC hippocampus was thicker, and has more densely-populated granule cells in the APC mouse hippocampus.

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Extracellular vesicles (EVs) are nanometer-sized membranous vesicles used for primitive cell-to-cell communication. We previously reported that colon cancer-derived EVs contain abundant miR-92a-3p and have a pro-angiogenic function. We previously identified Dickkopf-3 (Dkk-3) as a direct target of miR-92a-3p; however, the pro-angiogenic function of miR-92a-3p cannot only be attributed to downregulation of Dkk-3.

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Adenomatous polyposis coli (APC) is a large protein with multiple binding partners, suggesting diverse functions besides its well-known role in the destruction of β-catenin. To elucidate these complex functions, it is crucial to evaluate the precise subcellular distribution of APC within a cell and tissue. However, most of the commercially available anti-APC antibodies can only be used for limited applications, resulting in the use of independently generated antibodies.

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The adenomatous polyposis coli (APC) is a multifunctional protein as well as a tumor suppressor. To determine the functions of the C-terminal domain of APC, we explored APC (APC1638T) mice that express a truncated APC lacking the C-terminal domain. The APC1638T mice were tumor free and exhibited growth retardation.

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Dickkopf-related protein 3 (Dkk-3) is a potential tumor suppressor reported in various cancer entities. However, we found that Dkk-3 was exceptionally upregulated in bladder cancer T24 cells. To validate the biological role of Dkk-3 other than a tumor suppressor, we examined the function of Dkk-3 in T24 cells.

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