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148 results on '"Hiraga, Takeo"'

4. The case for thyroid disruption in early life stage exposures to thiram in zebrafish (Danio rerio)

Author

Chen, Xing, Fang, Mingliang, Chernick, Melissa, Wang, Feng, Yang, Jingfeng, Yu, Yongli, Zheng, Na, Teraoka, Hiroki, Nanba, Satomi, Hiraga, Takeo, Hinton, David E., Dong, Wu, Chen, Xing, Fang, Mingliang, Chernick, Melissa, Wang, Feng, Yang, Jingfeng, Yu, Yongli, Zheng, Na, Teraoka, Hiroki, Nanba, Satomi, Hiraga, Takeo, Hinton, David E., and Dong, Wu

Abstract

type:Article

Published
2020

13. Vertebral Formula in Red-Crowned Crane (Grus japonensis) and Hooded Crane (Grus monacha)

Author

HIRAGA, Takeo, SAKAMOTO, Haruka, NISHIKAWA, Sayaka, MUNEUCHI, Ippei, UEDA, Hiromi, INOUE, Masako, SHIMURA, Ryoji, UEBAYASHI, Akiko, YASUDA, Nobuhiro, MOMOSE, Kunikazu, MASATOMI, Hiroyuki, and TERAOKA, Hiroki

Subjects
Birds, Full Paper, Japan, Species Specificity, vertebrae, wild animals, Animals, Genetic Variation, cranes, Wildlife Science, Body Weights and Measures, Spine
Abstract

Red-crowned cranes (Grus japonensis) are distributed separately in the east Eurasian Continent (continental population) and in Hokkaido, Japan (island population). The island population is sedentary in eastern Hokkaido and has increased from a very small number of cranes to over 1,300, thus giving rise to the problem of poor genetic diversity. While, Hooded cranes (Grus monacha), which migrate from the east Eurasian Continent and winter mainly in Izumi, Kagoshima Prefecture, Japan, are about eight-time larger than the island population of Red-crowned cranes. We collected whole bodies of these two species, found dead or moribund in eastern Hokkaido and in Izumi, and observed skeletons with focus on vertebral formula. Numbers of cervical vertebrae (Cs), thoracic vertebrae (Ts), vertebrae composing the synsacrum (Sa) and free coccygeal vertebrae (free Cos) in 22 Red-crowned cranes were 17 or 18, 9–11, 13 or 14 and 7 or 8, respectively. Total number of vertebrae was 47, 48 or 49, and the vertebral formula was divided into three types including 9 sub-types. Numbers of Cs, Ts, vertebrae composing the Sa and free Cos in 25 Hooded cranes were 17 or 18, 9 or 10, 12–14 and 6–8, respectively. Total number of vertebrae was 46, 47, 48 or 49, and the vertebral formula was divided into four types including 14 sub-types. Our findings clearly showed various numerical vertebral patterns in both crane species; however, these variations in the vertebral formula may be unrelated to the genetic diversity.

Published
2014

14. Origin of Three Red-Crowned Cranes Grus japonensis Found in Northeast Honshu and West Hokkaido, Japan, from 2008 to 2012

Author

MIURA, Yoshiaki, SHIRAISHI, Junya, SHIOMI, Akira, KITAZAWA, Takio, HIRAGA, Takeo, MATSUMOTO, Fumio, TERAOKA, Hiroki, and MASATOMI, Hiroyuki

Subjects
Red-crowned (Japanese) Crane, continental population, Hokkaido, island population, genetic diversity
Abstract

The Red-crowned Crane Grus japonensis is an endangered species that has two separate breeding populations, one in the Amur River basin and the other in north and east Hokkaido, Japan. So far, only two (Gj1 and Gj2) and seven (Gj3-Gj9) haplotypes in D-loop of mtDNA were identified in Japan and in the continent, respectively. We obtained feathers from three cranes found in northeast Honshu. The crane in Akita in 2008, which also arrived at west Hokkaido, had a novel haplotype (Gj10). Another crane in Akita in 2009 showed a heteroplasmy (Gj7 and a novel type, Gj12). The third crane in Miyagi in 2010 also showed another type, Gj11. These results suggest that three Red-crowned Cranes appeared in Honshu and west Hokkaido were from the continent.

Published
2013

15. Physical Body Parameters of Red-Crowned Cranes Grus japonensis by Sex and Life Stage in Eastern Hokkaido, Japan

Author

INOUE, Masako, SHIMURA, Ryoji, UEBAYASHI, Akik, IKOMA, Shinobu, IIMA, Hiroko, SUMIYOSHI, Takashi, TERAOKA, Hiroki, MAKITA, Kohei, HIRAGA, Takeo, MOMOSE, Kunikazu, and MASATOMI, Hiroyuki

Subjects
stage difference, red-crowned (or Japanese) cranes, sexual difference, body size, Gruinae
Abstract

Red-crowned (or Japanese) cranes Grus japonensis are native to eastern Hokkaido, Japan—the island population, and mainland Asia—the continental population that migrates from breeding grounds along the Amur River Basin to winter in east China and the Korean Peninsula. The island population was reduced to about 50-60 birds in early part of the 20th century. Since 1950s, the population has increased to more than 1,300 as a consequence of human-provided food in winter, resulted in change of their habitats and food resource. From the carcasses of 284 wild cranes from the island population, collected in Hokkaido since 1976 until 2010, we measured six physical parameters (body weight and lengths of body, wing, tarsus, tail and exposed culmen) and divided into groups by sex and three developmental stages (juvenile, yearling and adult). All parameters of males were larger than those of females at the same stage. Total body length of females tends to grow up earlier than males, in contrast to body weight. Obvious time trends were not observed in these all parameters during 34 years for these six categories measured, except total length of male juveniles, which showed a significant increasing trend. These results provide the first extensive data on body size and mass in the wild red-crowned cranes.

Published
2013

16. Large-Scale Survey of Mitochondrial D-Loop of the Red-Crowned Crane Grus japonensis in Hokkaido, Japan by Convenient Genotyping Method

Author

MIURA, Yoshiaki, SHIOMI, Akira, SHIRAISHI, Junya, MAKITA, Kohei, ASAKAWA, Mitsuhiko, KITAZAWA, Takio, HIRAGA, Takeo, MOMOSE, Yulia, MOMOSE, Kunikazu, MASATOMI, Hiroyuki, and TERAOKA, Hiroki

Subjects
Grus japonensis, mitochondria, Hokkaido, Japan, Red-crowned Crane
Abstract

The Red-crowned Crane, Grus japonensis, is an endangered species of crane that has two separate breeding populations, one in the Amur River basin (continental population) and the other in eastern or northern Hokkaido, Japan (island population). So far, only two haplotypes (Gj1 and Gj2) have been identified in the mitochondrial D-loop in island population, whereas seven haplotypes have been found in continental population (Gj3-Gj9). We developed a rapid and inexpensive method of extensive genotyping of D-loop haplotypes in Red-crowned Cranes, based on amplification refractory mutation system (ARMS) PCR assay. Two hundred and three cranes in eastern Hokkaido were studied with this method and supplemental DNA sequencing. Only two haplotypes, Gj1 and Gj2, were confirmed in eastern Hokkaido with Gj2 as a major haplotype. Additionally, only Gj2 was identified in twelve feathers from both sexes found in northern Hokkaido. These results suggest scarce genetic diversity in island population of Red-crowned Cranes in Hokkaido, Japan.

Published
2013

17. [Ca.sup.2+] signaling in porcine duodenal glands by muscarinic receptor activation

Author

TERAOKA, HIROKI, MARUYAMA, YUTAKA, TAKEHANA, KAZUSHIGE, IWANAGA, TOSHIHIKO, HIRAGA, TAKEO, FUJITA, SHOICHI, and OHTA, TOSHIO

Subjects
Muscarinic receptors -- Physiological aspects, Swine -- Physiological aspects, Duodenum -- Physiological aspects, Calcium in the body -- Physiological aspects, Electrophysiology -- Research, Cellular signal transduction -- Physiological aspects, Secretion -- Physiological aspects, Biological sciences
Abstract

Teraoka, Hiroki, Yutaka Maruyama, Kazushige Takehana, Toshihiko Iwanaga, Takeo Hiraga, Shoichi Fujita, and Toshio Ohta. [Ca.sup.2+] signaling in porcine duodenal glands by muscarinic receptor activation. Am J Physiol Gastrointest Liver Physiol 280: G729-G737, 2001.--The duodenal glands have been thought to play an important role in defense against proximal duodenal ulcer; however, the secretory mechanisms of these glands remain to be determined. In isolated duodenal acinar cells of the pig, we investigated the effects of ACh on intracellular [Ca.sup.2+] concentration ([[[Ca.sup.2+]].sub.i]) and on membrane currents with fura 2 fluorometry and the patch clamp technique. ACh caused a transient increase in [[[Ca.sup.2+]].sub.i], and the increase was markedly inhibited by atropine or 4-diphenylacetoxy-N-methylpiperidine methiodide but not by hexamethonium, pirenzepine, or methoctramine. The expression of mRNA for the [M.sub.3] subtype far exceeded that for either [M.sub.1] or [M.sub.2] as revealed by real-time quantitative PCR and in situ hybridization. The rise in [[[Ca.sup.2+]].sub.i] evoked by ACh was largely inhibited by thapsigargin but slightly affected by extracellular [Ca.sup.2+] deprivation. Caffeine had no effect on [[[Ca.sup.2+]].sub.i]. ACh elicited [Ca.sup.2+]-dependent [K.sup.+] currents, a finding similar to the response to inositol 1,4,5,-trisphosphate applied intracellularly. These results suggest the presence of [M.sub.3] receptors linked to [Ca.sup.2+] release in porcine duodenal glands. Brunner's gland; calcium-induced calcium release; inositol 1,4,5-trisphosphate-induced calcium release; mucus; secretion

Published
2001

18. Characterization of feline cytochrome P450 2B6

Author

Okamatsu, Gaku, primary, Komatsu, Tetsuya, additional, Ono, Yuka, additional, Inoue, Hiroki, additional, Uchide, Tsuyoshi, additional, Onaga, Takenori, additional, Endoh, Daiji, additional, Kitazawa, Takio, additional, Hiraga, Takeo, additional, Uno, Yasuhiro, additional, and Teraoka, Hiroki, additional

Published
2016
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20. Characterization of feline cytochrome P450 2B6.

Author

Okamatsu, Gaku, Komatsu, Tetsuya, Ono, Yuka, Inoue, Hiroki, Uchide, Tsuyoshi, Onaga, Takenori, Endoh, Daiji, Kitazawa, Takio, Hiraga, Takeo, Uno, Yasuhiro, and Teraoka, Hiroki

Subjects
CYTOCHROME P-450, DRUG metabolism, CARNIVOROUS animals, ANTISENSE DNA, COUMARINS
Abstract

1. Little is known about drug metabolism in carnivores. Although the domestic cat (Felis catus) is an obligate carnivore and is the most common companion animal, usage and dosage of many drugs are determined according to information obtained from humans and dogs. We determined the complete cDNA sequence of CYP2B6 from the feline lung. 2. Feline CYP2B6 consists of 494 deduced amino acids, showing highest identity with the dog CYP2B ortholog, followed by those of horse, pig, primate and human. 3. Feline CYP2B6 transcripts were expressed predominantly in the lung and slightly in the small intestine but not in the liver without significant sex-dependent differences. Western blot analysis with an anti-human CYP2B6 antibody confirmed the presence of CYP2B protein in the lung but not in the liver. 4. Feline CYP2B6 proteins heterologously expressed inEscherichia colimetabolized several substrates specific to human CYP2B6, including 7-ethoxy-4-(trifluoromethyl) coumarin (EFC). The metabolic activity was strongly inhibited by medetomidine and atipamezole, potent inhibitors of canine CYP2B11 (now officially CYP2B6) as well as by ticlopidine and sertraline, inhibitors selective to human CYP2B6. 5. The results suggest that feline CYP2B6 is a functional CYP2B ortholog that plays a role in the local defense mechanism in the cat respiratory system and intestine. [ABSTRACT FROM PUBLISHER]

Published
2017
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22. Changes of Mercury Contamination in Red-Crowned Cranes, Grus japonensis, in East Hokkaido, Japan

Author

Teraoka, Hiroki, primary, Tagami, Yukari, additional, Kudo, Moe, additional, Miura, Yoshiaki, additional, Okamoto, Erika, additional, Matsumoto, Fumio, additional, Koga, Kimiya, additional, Uebayashi, Akiko, additional, Shimura, Ryoji, additional, Inoue, Masako, additional, Momose, Kunikazu, additional, Masatomi, Hiroyuki, additional, Kitazawa, Takio, additional, Hiraga, Takeo, additional, and Subramanian, Annamalai, additional

Published
2011
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27. HEAVY METAL CONTAMINATION STATUS OF JAPANESE CRANES (GRUS JAPONENSIS) IN EAST HOKKAIDO, JAPAN—EXTENSIVE MERCURY POLLUTION

Author

Teraoka, Hiroki, primary, Kumagai, Yoshihiro, additional, Iwai, Hisae, additional, Haraguchi, Kensaku, additional, Ohba, Takashi, additional, Nakai, Kunihiko, additional, Satoh, Hiroshi, additional, Sakamoto, Mineshi, additional, Momose, Kunikazu, additional, Masatomi, Hiroyuki, additional, and Hiraga, Takeo, additional

Published
2007
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