dioxouranium;nitric acid

• 分子结构分类: 无机化合物 - 混合金属/非金属化合物 - 锕系含氧阴离子化合物
• 英文名称: dioxouranium;nitric acid
• 化学式: H2N2O8U
• 分子量: 396.05
• InChiKey: MKYNHKOAYQRSBD-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -0.93
• 重原子数：
  11
• 可旋转键数：
  0
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.0
• 拓扑面积：
  166
• 氢给体数：
  2
• 氢受体数：
  8

ADMET

代谢

铀通过口服、吸入和皮肤途径被少量吸收。体内的铀通常以尿anyl离子（UO2）2+的形式存在，与阴离子如柠檬酸盐和碳酸氢盐或血浆蛋白结合。铀优先分布到骨骼、肝脏和肾脏。进入体内的铀大部分不被吸收，并通过尿液和粪便从体内排出。摄入一定量的硝酸盐和亚硝酸盐是人类氮循环的正常部分。在适当的条件下，硝酸盐可以在胃肠道内转化为亚硝酸盐，显著增强硝酸盐的毒性。硝酸盐的主要代谢途径是转化为亚硝酸盐，然后转化为氨。亚硝酸盐、硝酸盐及其代谢物通过尿液排出体外。

Uranium is absorbed in low amounts via oral, inhalation, and dermal routes. Uranium in body fluids generally exists as the uranyl ion (UO2)2+ complexed with anions, such as citrate and bicarbonate, or plasma proteins. Uranium preferentially distributes to bone, liver, and kidney. The large majority of uranium that enters the body is not absorbed and is eliminated from the body via the urine and faeces. Intake of some amount of nitrates and nitrites is a normal part of the nitrogen cycle in humans. In vivo conversion of nitrates to nitrites can occur in the gastrointestional tract under the right conditions, significantly enhancing nitrates' toxic potency. The major metabolic pathway for nitrate is conversion to nitrite, and then to ammonia. Nitrites, nitrates, and their metabolites are excreted in the urine. (L1137, L248)

来源:Toxin and Toxin Target Database (T3DB)

毒理性

• 毒性总结

铀与血液中的碳酸氢盐或血浆蛋白结合，但一旦进入肾脏，它就会被释放并与肾小管壁上的磷酸盐配体和蛋白质形成复合物，造成损害。铀还可能抑制肾近端小管中的依赖钠传输和不依赖钠传输的ATP利用以及线粒体的氧化磷酸化。铀通过损害肺泡上皮II型细胞引起呼吸系统疾病。铀诱导c-Jun N端激酶（JNK）和p38丝裂原活化蛋白激酶（p38 MAPK）的激活，进而诱导肿瘤坏死因子alpha（TNF-alpha）的分泌并在肺部产生炎症反应。研究表明，铀盐越可溶，毒性越大。铀产生的电离辐射损伤DNA，导致基因突变和染色体畸变。这可以启动并促进致癌作用，并干扰繁殖和发育。硝酸盐的毒性是由于其进入体内后转化为亚硝酸盐。亚硝酸盐导致氧合血红蛋白的自动催化氧化成过氧化氢和高铁血红蛋白。高铁血红蛋白水平的升高是一种称为高铁血红蛋白血症的状况，其特征是组织缺氧，因为高铁血红蛋白不能结合氧气。（A2450，L1613，L249，A160）

Uranium is combined with either bicarbonate or a plasma protein in the blood but once in the kidney, it is released and forms complexes with phosphate ligands and proteins in the tubular wall, causing damage. Uranium may also inhibit both sodium transport-dependent and independent ATP utilization and mitochondrial oxidative phosphorylation in the renal proximal tubule. Uranium causes respiratory diseases by damaging alveolar epithelium type II cells in the lungs. Uranium induces c-Jun N-terminal kinase (JNK) and p38 mitogen-activated protein kinase (p38 MAPK) activation, which in turn induces tumor necrosis factor alpha (TNF-alpha) secretion and generates and inflammatory response in the lungs. Studies have shown that the more soluble the uranium salt, the more toxic it is. Ionizing radiation produced by uranium damages the DNA, resulting in gene mutations and chromosomal aberrations. This can both both initiate and promote carcinogenesis, and interfere with reproduction and development. Nitrate's toxicity is a result of it's conversion to nitrite once in the body. Nitrite causes the autocatalytic oxidation of oxyhemoglobin to hydrogen peroxide and methemoglobin. This elevation of methemoglobin levels is a condition known as methemoglobinemia, and is characterized by tissue hypoxia, as methemoglobin cannot bind oxygen. (A2450, L1613, L249, A160)

来源:Toxin and Toxin Target Database (T3DB)

毒理性

• 致癌物分类

铀：第1组，对人类有致癌性（L135）

Uranium: Group 1, carcinogenic to humans (L135)

来源:Toxin and Toxin Target Database (T3DB)

毒理性

• 健康影响

铀主要损害肾脏，但也可能损害肺部、中枢神经系统和免疫系统。铀的放射性被认为会损害DNA，导致致癌效应以及生殖和发育损害。硝酸盐和亚硝酸盐中毒导致高铁血红蛋白血症。亚硝酸盐可能导致怀孕并发症和发育影响。它们也可能具有致癌性。

Uranium primarily damages the kidney, but may also damage the lungs, central nervous system, and immune system. Uranium's radioactivity is believed to damage the DNA, resulting in carcinogenic effects and reproductive and developmental damage. Nitrate and nitrite poisoning causes methemoglobinemia. Nitrites may cause pregnancy complications and developmental effects. They may also be carcinogenic. (L1137, L248, L249)

来源:Toxin and Toxin Target Database (T3DB)

毒理性

• 暴露途径

口服（L249）；吸入（L249）；皮肤给药（L249）

Oral (L249) ; inhalation (L249) ; dermal (L249)

来源:Toxin and Toxin Target Database (T3DB)

毒理性

• 症状

摄入铀可能会导致呕吐和腹泻。硝酸盐和亚硝酸盐中毒引起高铁血红蛋白血症。症状包括发绀、心脏心律不齐和循环衰竭，以及逐渐加重的中枢神经系统（CNS）影响。中枢神经系统的影响可能从轻微的眩晕和嗜睡到昏迷和抽搐不等。

Ingestion of uranium may cause vomiting and diarrhea. Nitrate and nitrite poisoning causes methemoglobinemia. Symptoms include cyanosis, cardiac dysrhythmias and circulatory failure, and progressive central nervous system (CNS) effects. CNS effects can range from mild dizziness and lethargy to coma and convulsions. (L1137, L248)

来源:Toxin and Toxin Target Database (T3DB)