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Exogenous nitric oxide elicits chemotaxis of neutrophils in vitro.

机译:外源一氧化氮抒发的趋化作用中性粒细胞在体外。

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Nitric oxide (NO) has been shown to be both an intercellular and intracellular messenger. We propose here that exogenous NO induces chemotactic locomotion of human neutrophils. Indeed, when human neutrophils were placed in a gradient of a nitric oxide donor (S-nitroso-N-acetylpenicillamine; SNAP), a directed locomotion was induced, as evidenced by experiments of chemotaxis under agarose. Degraded SNAP (i.e., SNAP solution which had previously released NO) did not induce directed locomotion. Moreover, oxyhemoglobin, a scavenger of free NO, suppressed the chemotactic effect of SNAP, whereas LY-83583, a soluble guanylate cyclase inhibitor, inhibited the SNAP-mediated chemotaxis in a dose-response manner. Other unrelated NO donors, SIN-1 and S-nitroso-cysteine--a natural S-nitroso-compound, also induced a directed locomotion of neutrophils. Taken together, these in vitro experiments indicate that exogenous NO could mediate the chemotaxis of neutrophils and thus suggest that NO could contribute to neutrophil recruitment in vivo.
机译:一氧化氮(NO)已被证明是一个细胞间和细胞内信使。提出外生不诱发人类中性粒细胞的趋化运动。实际上,当人类中性粒细胞被放置在一个一氧化氮供体的梯度(S-nitroso-N-acetylpenicillamine;定向运动是诱导,就是明证实验在琼脂糖的趋化作用。拍照(也就是说,此前的解决方案没有发布)没有诱导定向运动。此外,氧合血红蛋白,拾荒者免费不,抑制的趋化现象的影响,可溶性鸟苷酸环化酶而ly - 83583抑制剂,抑制SNAP-mediated趋化作用剂量反应的方式。捐助者、SIN-1和S-nitroso-cysteine——自然S-nitroso-compound,也诱导定向中性粒细胞的运动。体外实验表明,外生不调节中性粒细胞的趋化性,可以吗因此建议不可能导致中性粒细胞招聘体内。

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