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16. Preparation for oxidative stress in Chinese toads (Bufo gargarizans) living under natural conditions along an altitudinal gradient.

Author

Zhang, Haiying, Xu, Tisen, Jiao, Mingxue, Li, Xiangyong, Storey, Kenneth B., and Niu, Yonggang

Subjects
OXIDANT status, OXIDATIVE stress, GLUTATHIONE peroxidase, SUPEROXIDE dismutase, SKELETAL muscle
Abstract

Preparation for oxidative stress (POS) has been widely reported in animals under controlled laboratory conditions, but whether this phenomenon is visible in animals under natural conditions remains to be explored. Altitudinal gradients provide a good opportunity to address this question, since environmental conditions become more hostile with increasing altitude. Here, we investigated the levels of oxidative stress, oxidative damage, and antioxidant defenses in Chinese toads (Bufo gargarizans) along an altitudinal gradient (50 m, 1200 m, 2300 m, 3400 m above sea level). The results show that changing altitude led to a significantly lower ratio of oxidized to reduced glutathione in liver, with a higher value at 50 m. This ratio in muscle tissues did not differ significantly between altitudes of 50 m, 2300 m, and 3400 m. However, reduced glutathione content increased significantly along the altitude, with higher values in liver at 2300 m and higher values in skeletal muscle at 3400 m. Malondialdehyde (MDA) content in liver did not change significantly with increasing altitude. Brain and muscle tissues showed a higher MDA content at 50 m than the other three altitudes. The activities of superoxide dismutase, catalase, glutathione peroxidase, and glutathione‐S‐transferase, as well as total antioxidant capacity, also displayed tissue‐specific upregulation in heart, skeletal muscle, and brain, but all of these antioxidant enzymes except for glutathione‐S‐transferase were significantly reduced in liver along the altitudinal gradient. In summary, environmental factors at higher altitude did not lead to higher levels of oxidative stress and oxidative damage in B. gargarizans, mainly due to stronger antioxidant defenses. This study corroborates the occurrence of POS in high‐altitude toads living under field conditions and contributes to revealing the biochemical adaptations to extreme environments at higher altitude. Highlights: Increasing altitude did not significantly lead to higher levels of oxidative stress in the liver and skeletal muscle of Chinese toads (Bufo gargarizans).Toads at lower altitude (50 m) had higher levels of oxidative damage (malondialdehyde) than toads at the other three altitudes (1200 m, 2300 m, 3400 m).Antioxidant enzyme activities showed tissue‐specific upregulation in B. gargarizans along the altitudinal gradient, which coincides with the phenomenon of preparation for oxidative stress. [ABSTRACT FROM AUTHOR]

Published
2024
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20. Analysis of Forum Interaction Behavior Based on Cloud Class

Author

Zuo, Mingzhang, Xu, Yanli, Wang, Zhifeng, Zhao, Rong, Li, Xiangyong, Barbosa, Simone Diniz Junqueira, Editorial Board Member, Filipe, Joaquim, Editorial Board Member, Ghosh, Ashish, Editorial Board Member, Kotenko, Igor, Editorial Board Member, Yuan, Junsong, Editorial Board Member, Zhou, Lizhu, Editorial Board Member, Cheung, Simon K. S., editor, Jiao, Jianli, editor, Lee, Lap-Kei, editor, Zhang, Xuebo, editor, Li, Kam Cheong, editor, and Zhan, Zehui, editor

Published
2019
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26. Factors Associated With Rates of HBsAg Seroclearance in Adults With Chronic HBV Infection: A Systematic Review and Meta-analysis

Author

Yeo, Yee Hui, Ho, Hsiu J., Yang, Hwai-I, Tseng, Tai-Chung, Hosaka, Tetsuya, Trinh, Huy N., Kwak, Min-Sun, Park, Young Min, Fung, James Yan Yue, Buti, Maria, Rodríguez, Manuel, Treeprasertsuk, Sombat, Preda, Carmen Monica, Ungtrakul, Teerapat, Charatcharoenwitthaya, Phunchai, Li, Xiangyong, Li, Jiayi, Zhang, Jian, Le, Michael Huan, Wei, Bin, Zou, Biyao, Le, An, Jeong, Donghak, Chien, Nicholas, Kam, Leslie, Lee, Chiao-Chin, Riveiro-Barciela, Mar, Istratescu, Doina, Sriprayoon, Tassanee, Chong, Yutian, Tanwandee, Tawesak, Kobayashi, Mariko, Suzuki, Fumitaka, Yuen, Man-Fung, Lee, Hyo-Suk, Kao, Jia-Horng, Lok, Anna S., Wu, Chun-Ying, and Nguyen, Mindie H.

Published
2019
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34. The Bax inhibitor GmBI-1α interacts with a Nod factor receptor and plays a dual role in the legume-rhizobia symbiosis

Author

Yuan, Songli, primary, Ke, Danxia, additional, Liu, Bo, additional, Zhang, Mengke, additional, Li, Xiangyong, additional, Chen, Haifeng, additional, Zhang, Chanjuan, additional, Huang, Yi, additional, Sun, Shuai, additional, Shen, Jiafang, additional, Yang, Shuqi, additional, Zhou, Shunxin, additional, Leng, Piao, additional, Guan, Yuefeng, additional, and Zhou, Xinan, additional

Published
2023
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47. The Genetic Diversity of White-Backed Planthoppers (Sogatella furcifera) between Myanmar and Yunnan Province of China.

Author

Liu, Yue, Chan, Khin Nyein, Li, Xiangyong, Zhao, Xueqing, Chu, Dong, Yin, Yanqiong, Liu, Ying, and Chen, Aidong

Subjects
GENETIC variation, PLANTHOPPERS, LAST Glacial Maximum, GENE flow, BASE pairs, CHLOROPLAST DNA
Abstract

In order to clarify the migration route and the source of white-backed planthopper (WBPH) (Sogatella furcifera) between Myanmar and Yunnan Province, China, we collected six populations throughout Myanmar and five populations around the border areas in Yunnan Province, China. A total of 790 base pairs in the mtDNA COI genes from 416 individuals were obtained. A total of 43 haplotypes were identified, among which 37 were unique haplotypes, and the remaining 6 were shared among different populations. Two common shared haplotypes (H_1 and H_2) had a widespread distribution in all populations and accounted for 88.8% of the total haplotype frequency, suggesting a high-level gene flow among the Myanmar and Yunnan populations. Bayesian skyline plot (BSP) analysis results indicated that the effective population size of WBPH expanded between about 10,000 and 7000 years ago, and S. furcifera might follow the post-LGM (Last Glacial Maximum) expansion pattern. Based on the total migrant (Nem) value, it can be deduced that north and northeast Myanmar were the primary migration sources for WBPH populations in the southwest and south Yunnan regions. This study aims to contribute to the sustainable regional management of this important rice pest and provide new insights into the genetic diversity of WBPH in Southeast Asia. [ABSTRACT FROM AUTHOR]

Published
2023
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48. Supplementary Figure S1-7 from Radiation Resistance in KRAS-Mutated Lung Cancer Is Enabled by Stem-like Properties Mediated by an Osteopontin–EGFR Pathway

Author

Wang, Meng, primary, Han, Jing, primary, Marcar, Lynnette, primary, Black, Josh, primary, Liu, Qi, primary, Li, Xiangyong, primary, Nagulapalli, Kshithija, primary, Sequist, Lecia V., primary, Mak, Raymond H., primary, Benes, Cyril H., primary, Hong, Theodore S., primary, Gurtner, Kristin, primary, Krause, Mechthild, primary, Baumann, Michael, primary, Kang, Jing X., primary, Whetstine, Johnathan R., primary, and Willers, Henning, primary

Published
2023
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49. Legends to Supplementary Figures from Radiation Resistance in KRAS-Mutated Lung Cancer Is Enabled by Stem-like Properties Mediated by an Osteopontin–EGFR Pathway

Author

Wang, Meng, primary, Han, Jing, primary, Marcar, Lynnette, primary, Black, Josh, primary, Liu, Qi, primary, Li, Xiangyong, primary, Nagulapalli, Kshithija, primary, Sequist, Lecia V., primary, Mak, Raymond H., primary, Benes, Cyril H., primary, Hong, Theodore S., primary, Gurtner, Kristin, primary, Krause, Mechthild, primary, Baumann, Michael, primary, Kang, Jing X., primary, Whetstine, Johnathan R., primary, and Willers, Henning, primary

Published
2023
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50. Data from Radiation Resistance in KRAS-Mutated Lung Cancer Is Enabled by Stem-like Properties Mediated by an Osteopontin–EGFR Pathway

Author

Wang, Meng, primary, Han, Jing, primary, Marcar, Lynnette, primary, Black, Josh, primary, Liu, Qi, primary, Li, Xiangyong, primary, Nagulapalli, Kshithija, primary, Sequist, Lecia V., primary, Mak, Raymond H., primary, Benes, Cyril H., primary, Hong, Theodore S., primary, Gurtner, Kristin, primary, Krause, Mechthild, primary, Baumann, Michael, primary, Kang, Jing X., primary, Whetstine, Johnathan R., primary, and Willers, Henning, primary

Published
2023
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