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7 results on '"Huang, Yue-Ning"'

5. Latitudinal trends in foliar δ13C and δ15N of Quercus variabilis and their influencing factors.

Author

ZHANG Yu-ting, HUANG Yue-ning, LIU Jian-feng, JIANG Ze-ping, and NI Yan-yan

Abstract

We aimed to reveal the latitudinal trends in foliar δ13C and δ15N of Quercus variabilis, a widely distributed species in East Asia, associated with two ontogenetic stages (juvenile and mature trees) along a North-South transect (26°-40° N). The results showed that mature trees had higher foliar δ13C and δ15N values than juveniles. Foliar δ13C and δ15 values of trees with both ontogenetic stages were nonlinearly increased and decreased with latitude, respectively. No interaction between ontogenetic stage and latitude for the changes of foliar δ15N and δ13C indicated that both ontogenetic stages across the transect consistently responded to latitudinal environmental variations. Results from the random forest models indicated that foliar δ13N of Q. variabilis was mainly affected by soil nutrient contents, e. g., soil organic matter, phosphorus, nitrogen, whereas dominated factors for foliar δ13C were related to moisture, such as relative humidity, precipitation of growing season. [ABSTRACT FROM AUTHOR]

Published
2018
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6. Phyllanthus emblicaL. extract alleviates leptin resistance and lipid accumulation by inhibiting methylglyoxal production

Author

Huang, Yue-Ning, Chen, Sheng-Yi, Lin, Jer-An, Chiang, I-Chen, and Yen, Gow-Chin

Abstract

Increasing leptin resistance and methylglyoxal (MG) levels have been observed in patients with obesity, which is characterized by an imbalance in energy metabolism and abnormal fat accumulation. MG is highly reactive and easily glycates proteins, impairing their physiological functions in cells. Whether MG glycates leptin and results in leptin resistance are untested. Therefore, we hypothesized that MG might directly affect leptin structure and activity or indirectly affect leptin gene and receptor expression, thereby triggering leptin resistance. The fruit of Indian gooseberry (Phyllanthus emblicaL.) is rich in phenolic compounds (β-glucogallin, gallic acid, and ellagic acid) and can trap MG. This study aimed to evaluate the effect of a water extract from Indian gooseberry fruit (WEIG) on MG-induced leptin resistance in HepG2 cells. Protein cross-linking and carbonyl content measurement results showed that leptin resistance was induced by MG glycation but improved by WEIG treatment. Moreover, WEIG and its phenolic compounds (gallic acid and ellagic acid) significantly increased the mRNA expression of leptin receptors (Ob-Rb and HuB219.1), and this was accompanied by the suppression of SOCS3 and lipogenesis-associated signaling cascade (SREBP-1/ACC/FAS) gene expression and the activation of the JAK2/STAT3/AMPK/PPAR-α/CPT-1 pathway in human HepG2 liver cells exposed to free fatty acid. In conclusion, WEIG (150 μg/mL) dramatically alleviated leptin resistance and lipid accumulation by MG trapping and inhibiting MG-leptin glycation, indicating that MG is a risk factor for leptin resistance that WEIG can suppress. This finding will increase the application potential of P. emblicaL. in anti-obesity functional food industrial development.

Published
2023
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7. [Latitudinal trends in foliar δ 13 C and δ 15 N of Quercus variabilis and their influencing factors.]

Author

Liu JF, Zhang YT, Ni YY, Huang YN, and Jiang ZP

Subjects
Nitrogen, Plant Leaves, Soil, Trees, Carbon Isotopes analysis, Quercus
Abstract

We aimed to reveal the latitudinal trends in foliar δ 13 C and δ 15 N of Quercus variabilis, a widely distributed species in East Asia, associated with two ontogenetic stages (juvenile and mature trees) along a North-South transect (26°-40° N). The results showed that mature trees had higher foliar δ 13 C and δ 15 N values than juveniles. Foliar δ 13 C and δ 15 N values of trees with both ontogenetic stages were nonlinearly increased and decreased with latitude, respectively. No interaction between ontogenetic stage and latitude for the changes of foliar δ 15 N and δ 13 C indicated that both ontogenetic stages across the transect consistently responded to latitudinal environmental variations. Results from the random forest models indicated that foliar δ 15 N of Q. variabilis was mainly affected by soil nutrient contents, e.g., soil organic matter, phosphorus, nitrogen, whereas dominated factors for foliar δ 13 C were related to moisture, such as relative humidity, precipitation of growing season.

Published
2018
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