Search

Your search keyword '"Seiichiro Nakamura"' showing total 3 results
Start Over Author "Seiichiro Nakamura"
3 results on '"Seiichiro Nakamura"'

1. Bacterial and fungal gut microbiota of supralittoral talitrid amphipods feeding on brown macroalgae and paper.

Author

Seiichiro Nakamura, Junya Yumioka, Seishu Kachi, Yasunori Baba, and Shigeyuki Kawai

Subjects
Medicine, Science
Abstract

Some macroalgae drift on the ocean and are stranded on coasts, and these stranded brown macroalgae are regarded to be degraded by organisms. Alginate is a major component of brown macroalgae. An uncovering of how carbon is cycled through brown macroalgae is needed to deeply understand coastal ecosystems. In this study, to gain insights into metabolism of brown macroalgae and alginate in the organisms, we initially confirmed that supralittoral talitrid amphipods (beach fleas or sandhoppers collected on the Shibagaki coast in Ishikawa Prefecture, Japan) fed on the brown macroalgae. We then isolated bacteria such as Vibrio sp. with alginate-assimilating capability from the gut of the amphipods. Metagenomic analysis of the gut of amphipods housed in several conditions (e.g. macroalgae or paper as feed, non-sterilized or sterilized environment) showed no condition-dependent compositions of bacteria and fungi, but Vibrio sp. were detected at high frequency, in good agreement with the isolation of Vibrio sp. An intervention study using antibiotics showed that amphipods fed on algae or paper at about the same rate in the presence or absence of antibiotics, and that the antibiotics had no effects on the life span. Moreover, intervention with antibiotics completely killed Vibrio sp. and some other bacteria, and had significant effects on the composition of the flora in the gut, with elimination of the variations observed in the guts of amphipods housed without antibiotics. These data suggest that microbes that were killed by antibiotics, including Vibrio sp., in the gut of talitrid amphipods are not essential for assimilation of brown macroalgae.

Published
2022
Full Text
View/download PDF

2. A case of ameloblastic fibro-odontoma in the mandible and statistical observations in Japan

Author

Hitoshi Uchida, Shosuke Morita, Kimishige Shimizutani, Hiroshi Niki, Kenji Kakudo, and Seiichiro Nakamura

Subjects
Molar, Pathology, medicine.medical_specialty, business.industry, Ameloblastic Fibro-Odontoma, Enucleation, Mandible, Connective tissue, Anatomy, medicine.disease, Mandibular second molar, Ameloblastic fibroma, medicine.anatomical_structure, stomatognathic system, medicine, business, Calcification
Abstract

Ameloblastic fibro-odontoma is a rare odontgenic tumor resembling ameloblastic fibroma, but showing inductive changes that lead to the formation of dentine and enamel. The tumor occurs primarily in young patients. The molar region of the mandible is more often affected than the other sites.We present a case of ameloblastic fibro-odontoma in a 13-year-old boy. He was referred to us because of a swelling with pain in the molar region of the left side of the mandible. Radiographically, the lesion showed a multilocular radiolucency with numerous calcification foci from the impacted second molar to the third molar region of the left side of the mandible. Histologically, the tumor was composed of cellular connective tissue with proliferating odontogenic epithelium in the form of strands and islands, and dentinoid and tooth-like hard tissue. Enucleation of the tumor was performed under general anesthesia, and there has been no recurrence as of 3 years 8 months after operation.

Published
2001

3. A case of Beckwith-Wiedemann syndrome in a patient undergoing partial tongue resection for macroglossia

Author

Fumiya Ogawa, Koichi Matsumoto, Hiroshi Niki, Seiichiro Nakamura, Hitoshi Uchida, and Kenji Kakudo

Subjects
congenital, hereditary, and neonatal diseases and abnormalities, medicine.medical_specialty, business.industry, Beckwith–Wiedemann syndrome, medicine.disease, Surgery, medicine.anatomical_structure, stomatognathic system, Swallowing, Tongue, Anesthesia, Deformity, medicine, Macroglossia, Hernia, medicine.symptom, business, Mastication, Hemihypertrophy
Abstract

The Beckwith-Wiedemann syndrome, also called EMG syndrome, is characterized by umbilical cord hernia, macroglossia, and gigantism. It may be accompanied by deformity of the ear lobe, hypertrophy of the internal organs, low blood sugar, and hemihypertrophy.We report a case of Beckwith-Wiedemann syndrome in a 1-year-3-month-old girl. The diagnosis was made at the Department of Pediatrics, Kansai Medical College Hospital. She had no erupted teeth, and could not close her mouth completely because of macroglossia. There was also hemihypertrophy on her right side at presentation. The patient had occasional cramps because of low blood sugar (33mg/dl). Vshaped resection of the tongue was performed with the patient under general anesthesia after the blood sugar level had recovered to 76mg/dl. The patient made an uneventful recovery and was able to close her mouth. Eleven years after surgical treatment, she had no difficulty in mastication, swallowing, and speech. However, there was some impairment in the ability to sense acid and bitter tastes, and eruption of the permanent teeth was delayed.

Published
2000

Catalog

Books, media, physical & digital resources
See catalog results