Tadahiro Shimizu
Shinshu University
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Featured researches published by Tadahiro Shimizu.
Experimental and Toxicologic Pathology | 1997
Yoshihisa Hama; Tadahiro Shimizu; Shigetoshi Hosaka; Akira Sugenoya; Nobuteru Usuda
TNP-470 (AGM-1470), a synthetic analog of fumagillin (6-chloroacetyl-carbamoyloxy-4-(1,2-epoxy-1,5-dimethyl- 4-hexenyl)-5-methoxy-1-oxaspiro [2,5] octane 1, has been reported to reduce the supply of nutrients to experimental tumors by inhibiting angiogenesis. In this study, we investigated anti-tumor activity of TNP-470 against human thyroid anaplastic carcinoma with a view to developing a new treatment for this thyroid tumor. A transplantable tumor was established from thyroid anaplastic carcinoma of a 78-year-old woman, as a xenograft in nude mice (BALB/c, nu/nu, male). This transplantable tumor, with chromosomal abnormality was shown to be non-functional in excretory hormones and to preserve morphological characteristics of the original anaplastic tumor tissue. TNP-470 was given at a dose of 50 mg/kg b.w. to nude mice transplanted with human thyroid anaplastic carcinoma by different routes of administration: intratumoral, peritumoral, subcutaneous and intraperitoneal. Intratumoral and peritumoral administration were effective, and especially the TNP-470 administered by the former route completely inhibited tumor growth. Immunohistochemical analysis using anti-factor VIII antibody revealed the density of microvessels to be significantly decreased by local administration of TNP-470 (intratumoral administration, 7.8 +/- 2.9/mm2, control, 27.0 +/- 6.3/mm2; peritumoral administration, 9.7 +/- 2.6/mm2, control, 21.1 +/- 5.1/mm2). Our findings suggested the possibility of clinical application of TNP-470 to control the growth of human anaplastic thyroid carcinoma.
Clinical Endocrinology | 1993
Masayuki Maruyama; Akira Sugenoya; Shinya Kobayashi; Hiroyuki Masuda; Tadahiro Shimizu; Futoshi Lida
This is a case report of a patient with thyroid cancer with asymptomatic pulmonary metastases, and without obvious progression over 34 years.
Surgery Today | 1991
Shinya Kobayashi; Akira Sugenoya; Yoshio Kasuga; Hiroyuki Masuda; Minoru Fujimori; Makoto Komatsu; Shouzou Takahashi; Tadahiro Shimizu; Shirou Yokoyama; Futoshi Iida; Makoto Miyakawa
The problems encountered in the diagnosis and treatment of primary hyperparathyroidism were studied in 69 cases. The accuracy of imaging for hyperplasia was less than that for adenoma or carcinoma and the major causes for multiple operations were a failure to locate the four glands and mediastinal adenoma. The intravenous administration of high doses of calcitonin could reduce the serum calcium level of patients in hypercalcemic crisis. Carcinoma required ipsilateral modified radical neck dissection because of lymph node metastases, and non-medullary thyroid carcinoma was often associated with primary hyperparathyroidism. We found removal of the parathyroid adenoma and biopsy or extirpation of only one macroscopically normal gland to be a fully satisfactory procedure after bilateral neck exploration and attempting to identify at least four glands.
Head and Neck-journal for The Sciences and Specialties of The Head and Neck | 1993
Akira Sugenoya; Kiyoshi Shingu; Shinya Kobayashi; Hiroyuki Masuda; Shozo Takahashi; Tadahiro Shimizu; Hiroshi Onuma; Kazuhiko Asanuma; Nobuo Ito; Futoshi Iida
Head and Neck-journal for The Sciences and Specialties of The Head and Neck | 1995
Akira Sugenoya; Kiyoshi Matsuo; Kazuhiko Asanuma; Kiyoshi Shingu; Tadahiro Shimizu; Hiroyuki Masuda; Shinya Kobayashi; Futoshi Iida
British Journal of Surgery | 1992
Akira Sugenoya; Hiroyuki Masuda; Makoto Komatsu; Shirou Yokoyama; Tadahiro Shimizu; Minoru Fujimori; Shinya Kobayashi; Futoshi Iida
Endocrinologia Japonica | 1991
Shinya Kobayashi; Akira Sugenoya; Shouzou Takahashi; Yoshio Kasuga; Hiroyuki Masuda; Tadahiro Shimizu; Makoto Komatsu; Yoshiaki Haba; Futoshi Iida; Satoshi Shigematsu
Nihon Rinsho Geka Gakkai Zasshi (journal of Japan Surgical Association) | 2006
Tadahiro Shimizu; Chuji Shimizu; Akiko Shimizu; Kou Nakazawa
Nihon Rinsho Geka Gakkai Zasshi (journal of Japan Surgical Association) | 2002
Manabu Hiraguri; Shoichiro Koike; Koji Kubota; Kan Nakagawa; Tadahiro Shimizu; Takehiko Iwasa; Ko Nakazawa
European Journal of Endocrinology | 1992
Akira Sugenoya; Shinya Kobayashi; Yoshio Kasuga; Hiroyuki Masuda; Minoru Fujimori; Makoto Komatsu; Shozo Takahashi; Shiro Yokoyama; Tadahiro Shimizu; Takashi Yamada; Futoshi Iida