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Papers - Ogawa, Kaoru

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Transgene expression in neonatal mouse inner ear explants mediated by first and advanced generation adenovirus vectors

Kanzaki Sho, Ogawa Kaoru, Camper SA, Raphael Yehoash

Hearing research 169 ( 1-2 ) 112-120 2002.07

Research paper (scientific journal), Joint Work

人工中耳

Ogawa Kaoru

日本医師会雑誌「感覚器障害の臨床　update」 127 ( 9 ) 1497 2002.05

Research paper (scientific journal), Single Work

生涯教育シリーズ58，症候から診断へ第5集「耳漏」

Ogawa Kaoru

日本医師会雑誌 127 ( 8 ) 81-85 2002.04

Research paper (scientific journal), Single Work

急性低音障害型感音難聴の重症度分類

Shizuki Ken, Ogawa Kaoru, Inoue Yasuhiro, Taiji Hidenobu, Kanzaki Jin

Audiology Japan 45 ( 2 ) 144-148 2002.04

Research paper (scientific journal), Joint Work

Expression of c-Fos after noise-induced temporary threshold shift in the guinea pig cochlea

Shizuki Ken, Ogawa Kaoru, Matsunobu Takeshi, Kanzaki Jin, Ogita Kiyokazu

Neuroscience Letters 320 ( 1-2 ) 73 - 76 2002.03

ISSN 0304-3940

c-Fos is known to be a component of a transcription factor, activator protein-1, which is induced by oxidative stress. Guinea pigs were exposed to 4 kHz band noise of 110 dB SPL for 1 or 5 h and the expression of c-Fos in the organ of Corti was determined using Western blotting analysis and immunocytochemistry. c-Fos was expressed only after the noise exposure. The c-Fos expression was mainly found in the Hensen's cells, Claudius' cells and Deiter's cells of the basal and second turns of the cochlea. Since the threshold shift was temporary, the expression of c-Fos is therefore considered to contribute to the survival or protective function of the organ of Corti.

耳鳴.　特集「お母さんへの回答マニュアル耳鼻咽喉科Q＆A」

Ogawa Kaoru

JOHNS 18 ( 3 ) 328-329 2002.03

Research paper (scientific journal), Single Work

自声強調.　特集「お母さんへの回答マニュアル耳鼻咽喉科Q＆A」

Ogawa Kaoru

JOHNS 18 ( 3 ) 330-331 2002.03

Research paper (scientific journal), Single Work

耳漏.　「症候から診断へ」　　127 (8): 81-85, 2002

Ogawa Kaoru

日本医師会雑誌 127 ( 8 ) 81-85 2002.02

Research paper (scientific journal), Single Work

The diagnostic significance of the 3D-reconstracted MRI in vestibular schwannoma surgery: prediction of tumor origin

Inoue Yasuhiro, Ogawa Kaoru, Momoshima Suketaka, Kanzaki Jin

European archives of oto-rhino-laryngology 259 ( 2 ) 73-76 2002.02

Research paper (scientific journal), Joint Work

Expression of c-Fos after noise-induced temporary threshold shift in the guinea pig cochlea

Shizuki Ken, Ogawa Kaoru, Matsunobu Tuyoshi, Kanzaki Jin, Ogita K

Neuroscience Letter 320 ( 1-2 ) 73-76 2002.01

Research paper (scientific journal), Joint Work

The diagnostic significance of the 3D-reconstracted MRI in vestibular schwannoma surgery: prediction of tumor origin

Inoue Yasuhiro, Ogawa Kaoru, Kanzaki Jin

European Archive of Otorhinolaryngology 259 ( 2 ) 73-76 2002.01

Research paper (scientific journal), Joint Work

Transgene expression in neonatal mouse inner ear explants mediated by first and advanced generation adenovirus vectors

Kanzaki Sho, Ogawa Kaoru, Camper Sally A., Raphael Yehoash

Hearing Research 169 ( 1-2 ) 112 - 120 2002

ISSN 0378-5955

The mouse serves as a valuable model for treatment leading to the prevention and therapy of inner ear disease. Transgenic correction of genetic inner ear disease in mice may help develop treatment for human genetic inner ear disease. In mutations involving hair cells (HCs) or supporting cells (SCs), it is necessary to insert the wild-type transgenes directly into these cells. We used inner ear explants to characterize the transgenic expression using adenovirus-mediated reporter genes (bacterial lacZ). The variable parameters were the age of the explants (P1-P5), the type of vector (first and advanced generation adenovirus) and the genotype of the mouse (wild-type versus shaker-2 mutant). Transduction of cochlear HCs was detected at P1 and in some of the P3 cochleae. Low efficiency transduction of SCs was observed in P1 explants, but the efficiency increased with age and reached high levels at P5. The pattern of transduction was similar regardless of the genotype and the type of vector used. The data demonstrate that differentiating HCs and SCs in mouse explants can be transduced by adenovirus vectors, suggesting that cultures of mouse ears are a valuable model for developing inner ear gene therapy protocols.

Access to Document (DOI)

Expression of c-Fos after noise-induced temporary threshold shift in the guinea pig cochlea

Shizuki Ken, Ogawa Kaoru, Matsunobu Takeshi, Kanzaki Jin, Ogita Keisuke

Neuroscience letters 320 73-76 2002

Research paper (scientific journal), Joint Work

The diagnostic significance of the 3D-reconstructed MRI in vestibular schwannoma surgery

Inoue Y., Ogawa K., Momoshima S., Kanzaki J.

European Archives of Oto-Rhino-Laryngology 259 ( 2 ) 73 - 76 2002

ISSN 0937-4477

In hearing preservation surgery for the treatment of vestibular schwannoma (VS), one of the important factors is the determination of the origin of VS. In this study, we investigated the diagnostic significance of using an MRI obtained by the three-dimensional Fourier transform fast spin-echo technique (3D-reconstructed MRI) in order to determine the origin of VS. The subjects consisted of 20 patients with mainly intra-canalicular sized VS who underwent tumor removal at our hospital. The origin of VS was determined from the 3D-reconstructed MRI findings and the results of the caloric test. These findings were then compared with the surgical findings. In 15 out of 20 patients, the MRI findings closely corresponded to the surgical ones, while the origin of VS hardly could be detected when a tumor filled up to the fundus acoustics on the MRI findings of the axial sections. On the other hand, 6 out of 15 patients (40%) whose tumor originated from the inferior vestibular nerve showed canal paresis. In conclusion, 3D-reconstructed MRI is considered to be helpful in obtaining more precise information regarding the origin of VS compared to the caloric test.

Access to Document (DOI)

The glutamate receptor agonist, AMPA, induces acetylcholine release in guinea pig cochlea; a microdialysis study

Hoya Noriyuki, Ogawa Kaoru, Inoue Yasuhiro, Takiguchi Yoichiro, Kanzaki Jin

Neuroscience Letters 311 ( 3 ) 206 - 208 2001.10

ISSN 0304-3940

Acetylcholine (Ach) has been considered a major neurotransmitter in the inner ear efferent nerve endings. A bioassay analysis has shown that the electrical stimulation of the crossed olivocochlear bundle increased the Ach-like activity in the perilymph. Applying in vivo microdialysis techniques and high-performance liquid chromatography to the perilymph, the change of Ach level was thus measured before and after α-amino-3-hydroxy-5-methyl-4-isoxazole propionic acid (AMPA), a glutamate receptor agonist, was added to the perfusate. Ach was only detectable when the perfusate contained an acetylcholinesterase inhibitor. The level of Ach increased 2-3-fold immediately after AMPA was administered. Our data suggest that the afferent stimulation, such as the administration of AMPA, may therefore induce the release of Ach from the efferent nerve endings.

Access to Document (DOI)

耳鳴と心身医学.　トピックス「心身医学と耳鼻咽喉科」

Ogawa Kaoru，Shinden Seiichi

耳鼻咽喉科・頭頸部外科 73 823-827 2001.10

Research paper (scientific journal), Joint Work

耳鳴と心身医学.　トピックス「心身医学と耳鼻咽喉科」

Ogawa Kaoru

耳鼻咽喉科・頭頸部外科 73 823-827 2001.10

Research paper (scientific journal), Single Work

Effects of neuropepyide Y on cochlear blood flow in guinea pigs

Itou Mari, Ogawa Kaoru, Inoue Yasuhiro, Sato Minako, Kanzaki Jin

Acta Otolaryngologica 121 ( 5 ) 573-578 2001.06

Research paper (scientific journal), Joint Work

Mechanisms of photoinduced cochlear ischemia in the guinea pig

Saito H., Ogawa K., Inoue Y., Kanzaki J., Harada T., Hoya N.

ORL 63 ( 3 ) 148 - 154 2001.05

ISSN 0301-1569

An experimental model of cochlear ischemia using the photosensitization reaction of rose bengal (RB) is reported. Ischemia was induced by the systemic administration of RB solution and localized irradiation of the cochlea with a green light of specific wavelength for RB activation. After the RB solution was administered, the cochlear blood flow was temporarily increased and then decreased, and the latency of wave I of the auditory brainstem response increased and the amplitude of wave I decreased after RB injection and finally wave I disappeared completely. A histological study revealed thrombus formation in the vessels of the irradiated cochlea not only in the stria vascularis and the spiral ligament, but also in the modiolus. L-Histidine, a scavenger of singlet oxygen (¹O₂) and hydroxyl radical (^·OH), significantly prolonged cochlear dysfunction, but D-mannitol, a specific scavenger of ^·OH did not, suggesting that ¹O₂ has an important role in this reaction.

Access to Document (DOI)

Effect of tea cathekins on gastric submucosal circulation

Morishita T, Nagata H, Sekizuka E, Miyazaki, Nakamura A, Ogawa N, Mizushima H, Ihata A, Takemura S, Miyashita Y, Fujita H, Yoshitomi A, Murakami M, Nagahama T, Ishii H

Microcirculation Annual 2000 73-74 2001.05

Research paper (scientific journal), Joint Work

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