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Differentially Rice Protein Expression Between Rice Bran and Endosperm
( Ting-yu Chen ),( De-min Wu ),( Ji-jyun Lai ),( Chang-yue Li ),( Hui-fen Liao ) 한국농업기계학회 2018 한국농업기계학회 학술발표논문집 Vol.23 No.1
Rice (Oryza sativa L.), the major staple food for more than 60% of the world’s population, offer nutritional and health-enhancing properties. Therefore, breeding of new rice species has been fueled by the rising interest in Asian, Latin cuisines, and many countries. In Asia, rice and rice-based ingredients also appeal to both consumers and processors due to their unique combination of taste, nutrition, texture, and biological properties. Proteins and starch in rice are the two major components in rice seed, with approximately 8 and 80%, respectively. Especially in traditional Asian diet, rice seed contributes to about 28-54% of the protein source. The major rice proteins, including structural, metabolic, protective, and storage proteins, serve as sources of nitrogen, sulfur, and carbon for several important physiological functions. In our previous study also demonstrated that rice protein prolamin activated human mononuclear cells to produce cytokines and enhance anti-leukemic immunity. The present study aimed to compare the differentially expression of rice proteins with bran and endosperm by 2-dimentional electrophoresis (2-DE) and mass spectrometric assay. Several protein spots in 2-DE gel with different expression were isolated and identified. The results showed that the major proteins were metabolic, transporter, storage, antioxidant, disease resistant, and development-related proteins. Further investigation to clarify the different manifestations and functions of these proteins might contribute to development of new rice varieties and breeding with unique features.
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Yea-Chen Liu,Yu-Ying Hsiao,Kuo-Lung Ku,Hui-Fen Liao,Wei-Chun Chao 한국식품영양과학회 2018 Journal of medicinal food Vol.21 No.7
Macrophages play an indispensable role in the host immune defense. Macrophages can undergo polarization into classically (M1) and alternatively (M2) activated macrophages. M1 macrophages activate immune and inflammatory response, while M2 macrophages are involved in tissue remodeling. Mahonia oiwakensis (Mo) is a herbal medicine in Asia used for its anti-inflammatory and analgesic properties; however, the mechanism is unclear. This study analyzed the effect of Mo extracts and its effects on the polarization of both macrophage RAW264.7 cells and mouse splenic macrophages. Water (Mo-W) and EtOH extracts (Mo-E) did not change the viability of RAW264.7 cells, whereas Mo-E inhibited nitric oxide (NO) production. The major compounds, berberine and palmatine, decreased the viability and NO levels of cells. The secretion of inflammatory cytokines CXCL16, IL-6, L-selectin, MCP1, RANTES, and sTNF-R1 was downregulated, whereas the production of vascular endothelial growth factor (VEGF) was upregulated by Mo-E, berberine, and palmatine treatments. Mo-E, berberine, and palmatine stimulated the expression of macrophage CD68 and M2-type CD204 markers, decreased M1-mediated p-STAT1 and NF-κB, and increased M2-mediated p-STAT6 expression. Similar effects on M2 polarization were also observed in splenic macrophages from mice. In conclusion, Mo-E, berberine, and palmatine modulated macrophages through the suppression of M1-mediated inflammation and the recruitment of M2-mediated VEGF secretion and STAT6 expression.
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