Changes in expression of hepatic genes involved in energy metabolism during hibernation in captive, adult, female Japanese black bears (Ursus thibetanus japonicus)

2012 ◽  
Vol 163 (2) ◽  
pp. 254-261 ◽  
Author(s):  
Michito Shimozuru ◽  
Akari Kamine ◽  
Toshio Tsubota
Keyword(s):  
Energy Metabolism ◽  
Adult Female ◽  
Black Bears ◽  
Ursus Thibetanus ◽  
Hepatic Genes

scholarly journals Serum Progesterone and Estradiol-17.BETA. Concentrations in Captive and Free-Ranging Adult Female Japanese Black Bears (Ursus thibetanus japonicus).

2000 ◽  
Vol 62 (4) ◽  
pp. 415-420 ◽  
Author(s):  
Miho SATO ◽  
Toshio TSUBOTA ◽  
Kaori YAMAMOTO ◽  
Takeshi KOMATSU ◽  
Yukihiko HASHIMOTO ◽  
...  
Keyword(s):  
Adult Female ◽  
Black Bears ◽  
Serum Progesterone ◽  
Ursus Thibetanus ◽  
Free Ranging

Changes in expression of hepatic genes involved in lipid metabolism during prehibernation period in captive adult female Japanese black bears (Ursus thibetanus japonicus)

2012 ◽  
Vol 90 (8) ◽  
pp. 945-954 ◽  
Author(s):  
Michito Shimozuru ◽  
Kamine Akari ◽  
Toshio Tsubota
Keyword(s):  
Fatty Acid ◽  
Lipid Metabolism ◽  
Fatty Acid Synthase ◽  
Black Bears ◽  
Pcr Analysis ◽  
Physiological Changes ◽  
Atp Citrate Lyase ◽  
Ursus Thibetanus ◽  
Blood Biochemical ◽  
Hepatic Genes

Body fat accumulation in the prehibernation period is crucial for survival and reproduction during hibernation for bears. Bear body mass increases rapidly during their autumnal hyperphagia phase, which is attributed not only to an increase in food availability, but also to physiological changes in lipid metabolism. To test this hypothesis, we investigated changes in blood biochemical values and mRNA expression levels of hepatic genes involved in lipid metabolism during the active period (June, August, October, and November) in Japanese black bears ( Ursus thibetanus japonicus Schlegel, 1857), which were fed a constant ration throughout this period. Blood biochemical analysis revealed that plasma triglyceride concentrations decreased in October and November, implying that peripheral triglyceride uptake was accelerated in autumn. The liver was sampled by needle biopsy. Real-time polymerase chain reaction (PCR) analysis revealed that mRNA expressions of enzymes involved in glycolysis (glucokinase), as well as fatty acid and triglyceride synthesis (ATP-citrate lyase, acetyl-CoA carboxykinase 1, fatty acid synthase, and diacylglycerol O-acyltransferase 2), increased in November, which suggests that hepatic lipogenesis becomes accelerated during the hyperphagia phase. These results suggest that lipid metabolism is seasonally controlled even without changes in food intake. These physiological changes seen in the prehibernation period would contribute to the rapid mass gain necessary for hibernation.

Changes in liver microRNA expression and their possible regulatory role in energy metabolism-related genes in hibernating black bears

2021 ◽  
Vol 191 (2) ◽  
pp. 397-409
Author(s):  
Kazuhei Nishida ◽  
Michito Shimozuru ◽  
Yuko Okamatsu-Ogura ◽  
Mitsunori Miyazaki ◽  
Tsukasa Soma ◽  
...  
Keyword(s):  
Energy Metabolism ◽  
Microrna Expression ◽  
Black Bears ◽  
Regulatory Role

Electroejaculation and semen characteristics of Asiatic Black bears (Ursus thibetanus)

2007 ◽  
Vol 101 (3-4) ◽  
pp. 358-364 ◽  
Author(s):  
L.M. Chen ◽  
R. Hou ◽  
Z.H. Zhang ◽  
J.S. Wang ◽  
X.R. An ◽  
...  
Keyword(s):  
Black Bears ◽  
Ursus Thibetanus ◽  
Semen Characteristics

scholarly journals Foot-and-mouth disease in Asiatic black bears (Ursus thibetanus)

2014 ◽  
Vol 26 (5) ◽  
pp. 705-713 ◽  
Author(s):  
Kirsty Officer ◽  
Nguyen Thi Lan ◽  
Leanne Wicker ◽  
Nguyen Thi Hoa ◽  
Annemarie Weegenaar ◽  
...  
Keyword(s):  
Foot And Mouth Disease ◽  
Mouth Disease ◽  
Black Bears ◽  
Ursus Thibetanus ◽  
Foot And Mouth

scholarly journals Does hard mast production affect patterns of cementum annuli formation in premolar teeth of Asian black bears (Ursus thibetanus)?

PLoS ONE ◽  
2019 ◽  
Vol 14 (2) ◽  
pp. e0211561
Author(s):  
Kahoko Tochigi ◽  
Yukino Aoki ◽  
Tetsuya Maruyama ◽  
Koji Yamazaki ◽  
Chinatsu Kozakai ◽  
...  
Keyword(s):  
Black Bears ◽  
Ursus Thibetanus ◽  
Mast Production

Expressions of Steroidogenic Enzymes mRNA in the Testes of Japanese Black Bears (Ursus thibetanus japonicus) as Revealed by in situ Hybridization.

2008 ◽  
Vol 78 (Suppl_1) ◽  
pp. 297-297
Author(s):  
Ruriko Iibuchi ◽  
Junko Nio-Kobayashi ◽  
Sachiko Nakamura ◽  
Makoto Asano ◽  
Toshihiko Iwanaga ◽  
...  
Keyword(s):  
In Situ Hybridization ◽  
Black Bears ◽  
Steroidogenic Enzymes ◽  
Ursus Thibetanus
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