Nitric oxide contributes to high-salt perception in a blood-sucking insect model.

Nitric oxide contributes to high-salt perception in a blood-sucking insect model.
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DOI:
10.1038/s41598-017-15861-0
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发表时间:
2017-11-14
期刊:
影响因子:
4.6
通讯作者:
Barrozo RB
Barrozo RB
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Cano A;Pontes G;Sfara V;Anfossi D;Barrozo RB

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在所有生物体中,盐根据浓度的不同产生食欲或厌恶反应。食物中的低盐浓度会激发对摄入的积极反应,而高盐则会引发厌恶。然而,在某些生物体中,这种双重行为的机制才刚刚开始被发现。在Rhodnius prolixus中,使用药理学和行为测定,我们证明了在食物中的高盐检测后,一氧化氮(NO)依赖性级联被激活。这种激活涉及可溶性鸟苷酸环化酶(sGC)和环鸟苷一磷酸(cGMP)的产生。因此,每当这种级联反应被激活时,对低盐饮食的食欲反应就会转向厌恶。相反,当通过降低NO水平或通过影响sGC活性来阻断高盐溶液时,昆虫会进食厌恶的高盐溶液。NO/sGC/cGMP级联反应的激活控制了红腹蛙的避食行为。冗长在其他昆虫物种的调查应检查的可能性,高盐厌恶介导的NO/sSG/cGMP信号。
In all organisms, salts produce either appetitive or aversive responses depending on the concentration. While low-salt concentration in food elicits positive responses to ingest, high-salt triggers aversion. Still the mechanisms involved in this dual behavior have just started to be uncovered in some organisms. In Rhodnius prolixus, using pharmacological and behavioral assays, we demonstrated that upon high-salt detection in food a nitric oxide (NO) dependent cascade is activated. This activation involves a soluble guanylate cyclase (sGC) and the production of cyclic guanosine monophosphate (cGMP). Thus, appetitive responses to low-salt diets turn to aversion whenever this cascade is activated. Conversely, insects feed over aversive high-salt solutions when it is blocked by reducing NO levels or by affecting the sGC activity. The activation of NO/sGC/cGMP cascade commands the avoidance feeding behavior in R. prolixus. Investigations in other insect species should examine the possibility that high-salt aversion is mediated by NO/sSG/cGMP signaling.
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