Male reproductive senescence: the price of immune-induced oxidative damage on sexual attractiveness in the blue-footed booby.
Male reproductive senescence: the price of immune-induced oxidative damage on sexual attractiveness in the blue-footed booby.
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DOI：
10.1111/j.1365-2656.2007.01282.x
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发表时间：
2007-11
期刊：
影响因子：
--
通讯作者：
R. Torres;A. Velando
中科院分区：
文献类型：
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作者：
R. Torres;A. Velando
在动物中，雄性生殖通常是性吸引力的一种功能，基于性别二态特征的表达，这些特征真实地宣扬了雄性的品质。男性的表现可能会随着年龄的增长而下降，因为性吸引力的生理功能可能会受到衰老的影响。在这里，我们展示了性信号(脚色)随着年龄的增长而减弱，这可能是由于氧化损伤的有害影响。我们发现，与中年雄性相比，蓝脚苏拉·内布克斯在求爱时的脚色在衰老时没有那么吸引人。此外，我们通过用脂多糖免疫雄性动物来实验增加活性氧物种，脂多糖是一种细菌细胞壁成分，会在动物中诱导显著的氧化应激。免疫系统的激活导致了更大的脂质过氧化，并引发了颜色表达的变化(不那么吸引人)，特别是在衰老的男性身上。这些结果支持氧化应激影响生殖衰老的观点，并表明氧化损伤可能是长寿动物年龄-生殖模式的一个近端机制。
In animals, male reproduction is commonly a function of sexual attractiveness, based on the expression of sexually dimorphic traits that advertise genuinely the male's quality. Male performance may decline with age because physiological functions underlying sexual attractiveness may be affected by senescence. Here we show that a sexual signal (foot colour) declines with age, due probably to the deleterious effects of oxidative damage. We found that in the blue-footed booby Sula nebouxii foot colour during courtship was less attractive in senescent than in middle-aged males. In addition, we increased reactive oxygen species experimentally by immunizing males with lipopolysaccharide, a bacterial cell wall component that induces marked oxidative stress in animals. The immune system activation induced greater lipid peroxidation and invoked changes on colour expression (less attractive), particularly in senescent males. These results support the idea that oxidative stress affects reproductive senescence, and suggest that oxidative damage might be a proximal mechanism underlying age-reproductive patterns in long-lived animals.