Sublethal effects of pentachlorophenol in the abalone (Haliotis rufescens) as measured by in vivo 31P NMR spectroscopy.

Sublethal effects of pentachlorophenol in the abalone (Haliotis rufescens) as measured by in vivo 31P NMR spectroscopy.
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通过体内 31P NMR 光谱测量五氯苯酚对鲍鱼(Haliotis rufescens)的亚致死作用。

DOI:
10.1002/jbt.2570060107
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发表时间:
1991
期刊:
Journal of biochemical toxicology
影响因子:
--
通讯作者:
Crosby,DG
Crosby,DG
中科院分区:
--
文献类型:
--
作者:
Tjeerdema,RS;Fan,TW;Higashi,RM;Crosby,DG

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使用流通式曝光系统,通过体内 31P NMR 光谱研究了五氯苯酚 (PCP) 在活体完整红鲍 (Haliotis rufescens) 中的亚致死生化效应。根据测距测试(6 小时 LC50 = 1.6 mg/L;6 小时无观察效应水平 (NOEL) = 0.8 mg/L),将三只鲍鱼分别暴露于亚致死浓度 (1.2 mg/L) 下 5 小时,然后进行 13 小时恢复期。对足部肌肉的影响包括磷酸精氨酸的减少和无机单磷酸盐浓度的增加(分别为[PA]和[Pi]);足部肌肉中三磷酸腺苷 [ATP] 的浓度和细胞内 pH 值 (pHi) 也下降。平行体外实验显示,3-磷酸甘油、乳酸、柠檬酸、琥珀酸、苹果酸和丙氨酸 (Ala) 的浓度均增加,而 3-磷酸甘油醛和谷氨酰胺 (Gln) 的浓度保持稳定。此外,这些影响直到暴露 2 小时后才明显,这可能是五氯苯酚在足部肌肉中达到有效浓度所需的时间。在恢复过程中,虽然 Pi 下降到暴露前的水平,但只有一个人的 [PA] 完全恢复。此外,pHi 的重新碱化与 [Pi] 的恢复类似,并且 ATP 恢复到接近初始水平,3-磷酸甘油、乳酸、琥珀酸、苹果酸和丙氨酸也是如此; 3-磷酸​​甘油醛、柠檬酸盐和谷氨酰胺水平下降。恢复反应对应于足部肌肉中 PCP 清除的时间。五氯苯酚的作用与缺氧、疲劳、高盐度和精氨酸激酶抑制剂的作用相似,因此亚致死浓度的五氯苯酚也可能抑制完整软体动物中的电子传递和精氨酸激酶以及解偶联线粒体氧化磷酸化。因此,现在可以在完整的水生生物中测量污染物对关键生化过程的影响,从而提高我们在实验室中准确评估污染物对环境影响的能力。
The sublethal biochemical effects of pentachlorophenol (PCP) were investigated in live, intact red abalones (Haliotis rufescens), using a flow‐through exposure system, by in vivo31P NMR spectroscopy. Based on rangefinding tests (6‐hr LC50= 1.6 mg/L; 6‐hr no‐observable‐effect‐level (NOEL) = 0.8 mg/L), three abalones were separately exposed to a sublethal concentration (1.2 mg/L) for 5 hr, followed by a 13 hr recovery period. Effects in foot muscle included both a decrease in phosphoarginine and an increase in inorganic monophosphate concentrations ([PA] and [Pi], respectively); both foot muscle concentrations of adenosine triphosphate [ATP] and intracellular pH (pHi) also declined. Parallel in vitro experiments revealed that concentrations of glycerol 3‐phosphate, lactate, citrate, succinate, malate, and alanine (Ala) all increased, while those of glyceraldehyde 3‐phosphate and glutamine (Gln) remained stable. Also, these effects were not evident until 2 hr into exposure, possibly the time required for PCP to attain an effective concentration in foot muscle. During recovery, while Pideclined to pre‐exposure levels, [PA] completely recovered in only one individual. Also, realkalinization of pHiwas similar to recovery of [Pi], and ATP returned to near‐initial levels, as did glycerol 3‐phosphate, lactate, succinate, malate, and Ala; glyceraldehyde 3‐phosphate, citrate, and Gln levels declined. Recovery responses corresponded to the time for PCP clearance from foot muscle. The effects of PCP were similar to those of hypoxia, fatigue, hypersalinity, and arginine kinase inhibitors, and so sublethal PCP concentrations may also inhibit electron transport and arginine kinase as well as uncouple mitochondrial oxidative phosphorylation in intact molluscs. Thus, the effects of pollutants on key biochemical processes may now be measured in intact aquatic organisms as they occur, improving our ability to accurately assess the environmental effects of pollutants in the laboratory.
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