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Yu-Xiao Zou,Teng-Gen Hu,Ying Shi,Jun Liu,Li-Xia Mu,Yang Xiao,Sen-Tai Liao 한국응용곤충학회 2017 Journal of Asia-Pacific Entomology Vol.20 No.4
Silkworm pupae are a source of edible lipid with a high content of unsaturated fatty acids (UFAs) (70% of total lipid content) and are becoming a focus of pharmaceutical and dietary research in the functional oil field. To study the nutritional value of different silkworm strains, principal component analysis (PCA) was used to establish a mathematical model and cluster analysis on silkworm pupae lipid (SPL) in 90 strains based on Z-score. Single-factor correlation analysis indicated that the PUFAs content was significantly positively correlated with the α-linolenic acid (ALA) (ρ=0.98) and negatively correlated with the oleic acid (OA) (ρ=−0.73) contents, and comprehensive of principal components mathematical model (PC =0.148ZX1 +0.00 2ZX2 −0.197ZX3 −0.338ZX4 +0.220ZX5 +0.304ZX6 +0.314ZX7, ZXi is the standard score (Z-score) of X1, which was calculated as follow: ZXi = (Xi −−X )/S, where X1: palmitic acid, X2: palmitoleic acid, X3: stearic acid, X4: OA, X5: linoleic acid, X6: ALA, X7: PUFAs.−X is the arithmetic mean content of variable i, and S is the standard deviation of variable i for all samples included in the analysis.) showed the amount of ALA and PUFAs were the key factors determining the nutritional value of the pupae lipid. Cluster analysis on the composite scores calculated by the model of the principal component divided the 90 strains into three groups. A cluster of 6 strains (XHR, XIFF, ZX, YT, YO and BTN) with the best nutritional value was characterized by high contents of ALA and PUFAs and a low content of oleic acid.
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Weixin Li,Li-Xia Mu,Leiyan Wu,Yu-Xiao Zou,Hai-Feng Zhao,Sen-Tai Liao 한국응용곤충학회 2019 Journal of Asia-Pacific Entomology Vol.22 No.2
The effects of silkworm pupa protein hydrolysates (SPPHs) on the apoptosis of MGC-803 gastric cancer cells were investigated in this study. The role of mitochondrial-dependent apoptosis in SPPHs-dependent inhibition of MGC-803 cell viability was also explored. SPPHs were found to induce apoptosis in MGC-803 cells with an IC 50 of 0.30 mg/ml. A series of changes in cellular organelle structural were observed during MGC-803 cell apoptosis that included mitochondrial swelling, vacuolation and rupture. These changes may ultimately impact on metabolic energy supply in MGC-803 cells. The expression of the pro- and anti-apoptotic proteins Bcl-2 and Bax, and the activation of cytochrome c (Cyt C), Caspase-3 and Caspase-9 were altered following induction of apoptosis by SPPHs in MGC-803 cells. Moreover, the increase in the ratio of Bax to Bcl-2 expression is known to play an important role in the activation of the mitochondrial-dependent apoptotic pathway.
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