Publications by authors named "Tomoaki Hirashima"

Constitutional indocyanine green (ICG) excretion defect (CIED) is a rare clinical condition characterized by markedly delayed ICG disappearance with other normal liver function tests. Here, we report a case of CIED in which laparoscopic anatomical liver resection was successfully performed using ICG fluorescence staining. A 64-year-old man with a 4-cm tumor located in the liver segment 5 was referred to our hospital.

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Inflammatory bowel diseases (IBDs), such as Crohn's disease or ulcerative colitis, can be treated with anti TNF-alpha (TNF-α) antibodies (Abs), but they also put patients with IBDs at risk of cancer. We aimed to determine whether the anti TNF-α Ab induces colon cancer development in vitro and in vivo, and to identify the genes involved in colitis-associated cancer. We found that TNF-α (50 ng/mL) inhibited the proliferation, migration, and invasion of HCT8 and COLO205 colon cancer cell lines and that anti TNF-α Ab neutralized TNF-α inhibition in vitro.

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Cancer-associated fibroblasts (CAFs) are a major component of the tumor microenvironment and have been shown to promote cancer aggressiveness. In our previous study, analysis of expression profiles obtained from paired CAFs and normal fibroblasts from colorectal cancer (CRC) tissue revealed that gene sets related to the Wnt signaling pathway were highly enriched in colorectal CAFs. Furthermore, among the components of the β-catenin-independent Wnt pathway, Wnt5a was highly expressed in CAFs.

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Background: Oxaliplatin, one of the key cytotoxic drugs for colorectal cancer, frequently causes peripheral neuropathy which leads to dose modification and decreased patients' quality of life. However, prophylactic or therapeutic measures have not yet been established. Orally administered amino acids, cystine and theanine, promoted the synthesis of glutathione which was one of the potential candidates for preventing the neuropathy.

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We here report a case of endoscopy-assisted partial duodenal resection for duodenal adenoma in a patient with familial adenomatous polyposis(FAP). A male underwent total proctocolectomy with ileal pouch anal anastomosis in 1997. Since 2004, duodenal adenomas occurred and the atypical grade of adenoma was gradually aggravated.

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