食品科学

• 营养卫生 • 上一篇    下一篇

根皮苷对雌性果蝇寿命的影响及其作用机制

赵 江1,陈 纯1,韩晓东2,刘素稳3,马 娜1,4,王 浩1,*   

  1. 1.天津科技大学食品工程与生物技术学院,天津 300457;2.天津津酒集团,天津 300131;
    3.河北科技师范学院食品科技学院,河北 秦皇岛 066600;4.天津科技大学生物工程学院,天津 300457
  • 出版日期:2015-04-15 发布日期:2015-05-05

Effect of Phloridzin on Life Span of Female Drosophila melanogaster and Its Underlying Mechanism

ZHAO Jiang1, CHEN Chun1, HAN Xiaodong2, LIU Suwen3, MA Na1,4, WANG Hao1,*   

  1. 1. School of Food Engineering and Biological Technology, Tianjin University of Science and Technology, Tianjin 300457;
    2. Tianjin Jinjiu Group Co. Ltd., Tianjin 300131, China; 3. College of Food Science and Technology, Hebei Normal University of Science
    and Technology, Qinhuangdao 066600; 4. College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457
  • Online:2015-04-15 Published:2015-05-05

摘要:

目的:研究根皮苷(phloridzin)对雌性果蝇寿命的影响并探究其延缓果蝇衰老的分子机制。方法:在果蝇寿命实验中,采用2 日龄雌性果蝇作为研究对象,在其培养基中分别加入0、0.5、2.0、5.0 mg/mL根皮苷进行培养,直至果蝇全部死亡,计算果蝇的平均寿命和最长寿命;通过白草枯和双氧水急性实验测定根皮苷对果蝇氧化应激损伤的影响;试剂盒法测定果蝇体内抗氧化酶活力;实时荧光定量聚合酶链式反应(real-time polymerasechain reaction,real-time PCR)检测抗氧化基因表达水平。结果:2.0、5.0 mg/mL根皮苷可以显著延长果蝇的平均寿命和最长寿命(P<0.05);根皮苷能够对百草枯和双氧水造成的雌性果蝇氧化应激损伤起到有效保护作用;添加 5.0 mg/mL根皮苷可以极显著提高Cu/Zn-超氧化物歧化酶(superoxide dismutase,SOD)和过氧化氢酶(catalase,CAT)活力(P<0.01),极显著降低丙二醛(malonaldehyde,MDA)含量(P<0.01);添加5.0 mg/mL根皮苷可以极显著上调Cu/Zn-SOD及CAT mRNA表达水平(P<0.01)。结论:根皮苷能够延缓雌性果蝇衰老,且具有抗氧化作用,这可能与其调控抗氧化基因的表达水平相关。

关键词: 果蝇, 根皮苷, 寿命, 抗氧化, 酶活力, 基因表达

Abstract:

Objective: To explore the effect of phlorizin on lifespan in female Drosophila melanogaster and its underlying
mechanism. Methods: Two-day-old flies were reared in media containing 0, 0.5, 2.0 and 5.0 mg/mL phlorizin until they
all died, and then the longest lifespan and mean lifespan were calculated. By paraquat and hydrogen peroxide acute
experiments, the effect of phlorizin on oxidative stress injury in Drosophila melanogaster was determined. The antioxidant
capacity of phlorizin was evaluated by the activities of superoxide dismutase (T-SOD and Cu/Zn-SOD), catalase (CAT)
and malondialdehyde (MDA) content in fruit flies. Real-time PCR was used to detect the expression of antioxidant genes.
Results: Dietary addition of phlorizin could prolong the lifespan of Drosophila melanogaster (especially at 2.0, 5.0 mg/mL,
P < 0.05). The Cu/Zn-SOD and CAT activities were significantly increased and MDA content was significantly decreased by
dietary supplementation of 5.0 mg/mL phlorizin (P < 0.01). Moreover, a significant increase in Cu/Zn-SOD and CAT mRNA
expression (P < 0.01) was found. Conclusion: The anti-aging and antioxidant activity of phlorizin is most likely related to
the regulation of antioxidant gene expression.

Key words: Drosophila melanogaste, phlorizin, lifespan, antioxidant, enzyme activity, gene expression

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