(2E,4Z,8E,10E,14Z,18Z,20Z)-20-(carboxymethyl)-6-methoxy-2,5,17-trimethyldocosa-2,4,8,10,14,18,20-heptaenedioic acid

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 羧酸及其衍生物
• 英文名称: (2E,4Z,8E,10E,14Z,18Z,20Z)-20-(carboxymethyl)-6-methoxy-2,5,17-trimethyldocosa-2,4,8,10,14,18,20-heptaenedioic acid
• 化学式: C₂₈H₃₈O₇
• 分子量: 486.6
• InChiKey: SHCXABJSXUACKU-IPUKGTGASA-N

计算性质

• 辛醇/水分配系数(LogP)：
  5.7
• 重原子数：
  35
• 可旋转键数：
  17
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.39
• 拓扑面积：
  121
• 氢给体数：
  3
• 氢受体数：
  7

ADMET

毒理性

• 相互作用

在体外，研究了冰片酸对菠萝蛋白酶、木瓜蛋白酶和无花果蛋白酶的影响。这些酶对酪蛋白的水解作用被冰片酸抑制，但即使有大量效应剂，抑制也总是不完全的。使用在有机汞琼脂糖亲和柱上纯化的完全激活的菠萝蛋白酶样本，冰片酸的抑制并不是计量比的。在24°C下与过量的冰片酸孵化20分钟后，半胱氨酸的SH基团保持完整。然而，通过在37°C下与5 mM半胱氨酸或2-巯基乙醇孵化5分钟，冰片酸对菠萝蛋白酶的部分抑制被逆转。乙二醇和甘油没有这种恢复作用。这些结果表明，冰片酸的分子非共价地结合到巯基蛋白酶上，只是部分地、可逆地遮蔽其关键的SH基团。

The in vitro effect of bongkrekic acid on stem bromelain, papain and ficin was studied. The hydrolysis of casein by these enzymes was inhibited by bongkrekic acid, but the inhibition was always incomplete even with a large excess of the effector. Using a fully activated specimen of stem bromelain, purified on an organomercurial agarose affinity column, the inhibition by bongkrekic acid was not stoichiometric. The SH group of cysteine remained intact after incubation with an excess of bongkrekic acid at 24 degrees C for 20 min. However, partial inhibition of stem bromelain by bongkrekic acid was reversed by incubation at 37 degrees C for 5 min with 5 mM cysteine or 2-mercaptoethanol. Ethylene glycol and glycerol had no such restorative effect. These results indicate that molecules of bongkrekic acid are non-covalently bound to a thiol protease, only partially and reversibly shielding its essential SH group.

来源:Hazardous Substances Data Bank (HSDB)

毒理性

• 毒性总结

识别和使用：冰片酸（BA）是一种白色无定形固体。已知BA是由细菌枯草杆菌 pv. cocovenenans产生的。它被用作生化研究的工具。人类研究：在莫桑比克的一个农村小镇，超过230人因饮用pombe（一种传统的酒精饮料）而生病，其中75人死亡。在疑似pombe中检测到BA的有毒水平，但在对照pombe中没有。产生BA的细菌枯草杆菌pathovar cocovenenans在制作pombe的面粉中被检测到。BA是腺苷酸转位酶（ANT）的抑制剂。由于抑制ANT与抑制线粒体中细胞色素c的释放有关，这进而导致凋亡的抑制，因此它已被用作研究凋亡机制的工工具。BA与印度尼西亚和中国的椰子和玉米制品引起的食源性疾病爆发有关。动物研究：BA是线粒体ATP/ADP转位酶的强效抑制剂，通过刺激ATP敏感钾通道（K-ATP通道）活性，抑制胰腺β细胞对葡萄糖诱导的电活动。

IDENTIFICATION AND USE: Bongkrekic acid (BA) is a white amorphous solid. BA is known to be produced by the bacterium Burkholderia gladioli pv. cocovenenans. It is used as a tool in biochemical research. HUMAN STUDIES: In a rural town in Mozambique, >230 persons became sick and 75 died of an illness linked to drinking pombe, a traditional alcoholic beverage. Toxic levels of BA were detected in the suspect pombe but not the control pombe. Burkholderia gladioli pathovar cocovenenans, the bacteria that produces BA, was detected in the flour used to make the pombe. BA is an inhibitor of adenine nucleotide translocase (ANT). Since inhibition of ANT is connected to the inhibition of cytochrome c release from mitochondria, which then results in the suppression of apoptosis, it has been used as a tool for the mechanistic investigation of apoptosis. BA has been implicated in outbreaks of food-borne illness involving coconut- and corn-based products in Indonesia and China. ANIMAL STUDIES: BA, a potent inhibitor of the mitochondrial ATP/ADP translocase, inhibits glucose-induced electrical activity in the pancreatic beta-cell through the stimulation of ATP-sensitive potassium channel (K-ATP-channel) activity.

来源:Hazardous Substances Data Bank (HSDB)

毒理性

• 解毒与急救

/SRP:/ 立即急救：确保已经进行了充分去污。如果患者停止呼吸，开始人工呼吸，最好使用需求阀复苏器、气囊面罩装置或口袋面罩，按培训操作。如有必要，执行心肺复苏。立即用缓慢流动的水冲洗受污染的眼睛。不要催吐。如果发生呕吐，让患者向前倾或放在左侧（如果可能的话，头部向下）以保持呼吸道畅通，防止吸入。保持患者安静，维持正常体温。寻求医疗帮助。 /毒物A和B/

/SRP:/ Immediate first aid: Ensure that adequate decontamination has been carried out. If patient is not breathing, start artificial respiration, preferably with a demand valve resuscitator, bag-valve-mask device, or pocket mask, as trained. Perform CPR if necessary. Immediately flush contaminated eyes with gently flowing water. Do not induce vomiting. If vomiting occurs, lean patient forward or place on left side (head-down position, if possible) to maintain an open airway and prevent aspiration. Keep patient quiet and maintain normal body temperature. Obtain medical attention. /Poisons A and B/

来源:Hazardous Substances Data Bank (HSDB)

毒理性

• 解毒与急救

/SRP:/ 基本治疗：建立专利气道（如有需要，使用口咽或鼻咽气道）。如有必要，进行吸痰。观察呼吸不足的迹象，如有需要，辅助通气。通过非循环呼吸面罩以10至15升/分钟的速度给予氧气。监测肺水肿，如有必要，进行治疗……。监测休克，如有必要，进行治疗……。预防癫痫发作，如有必要，进行治疗……。对于眼睛污染，立即用水冲洗眼睛。在运输过程中，用0.9%的生理盐水（NS）持续冲洗每只眼睛……。不要使用催吐剂。对于摄入，如果患者能够吞咽、有强烈的呕吐反射且不流口水，则用水冲洗口腔，并给予5毫升/千克，最多200毫升的水进行稀释……。在去污后，用干燥的无菌敷料覆盖皮肤烧伤……。/毒物A和B/

/SRP:/ Basic treatment: Establish a patent airway (oropharyngeal or nasopharyngeal airway, if needed). Suction if necessary. Watch for signs of respiratory insufficiency and assist ventilations if needed. Administer oxygen by nonrebreather mask at 10 to 15 L/min. Monitor for pulmonary edema and treat if necessary ... . Monitor for shock and treat if necessary ... . Anticipate seizures and treat if necessary ... . For eye contamination, flush eyes immediately with water. Irrigate each eye continuously with 0.9% saline (NS) during transport ... . Do not use emetics. For ingestion, rinse mouth and administer 5 mL/kg up to 200 mL of water for dilution if the patient can swallow, has a strong gag reflex, and does not drool ... . Cover skin burns with dry sterile dressings after decontamination ... . /Poisons A and B/

来源:Hazardous Substances Data Bank (HSDB)

毒理性

• 解毒与急救

/SRP:/ 高级治疗：对于昏迷、严重肺水肿或严重呼吸困难的病人，考虑进行口咽或鼻咽插管以控制气道。使用带气囊的面罩进行正压通气技术可能有益。考虑使用药物治疗肺水肿……。对于严重的支气管痉挛，考虑给予β激动剂，如沙丁胺醇……。监测心率和必要时治疗心律失常……。开始静脉输注5%葡萄糖水（D5W），保持通路开放，最低流量/ SRP: "To keep open", minimal flow rate /. 如果出现低血容量的迹象，使用0.9%生理盐水（NS）或乳酸钠林格液（LR）。对于伴有低血容量迹象的低血压，谨慎给予液体。注意液体过载的迹象……。用安定（地西泮）或劳拉西泮（阿蒂万）治疗癫痫……。使用丙美卡因氢氯化物协助眼部冲洗……。/毒素A和B/

/SRP:/ Advanced treatment: Consider orotracheal or nasotracheal intubation for airway control in the patient who is unconscious, has severe pulmonary edema, or is in severe respiratory distress. Positive-pressure ventilation techniques with a bag valve mask device may be beneficial. Consider drug therapy for pulmonary edema ... . Consider administering a beta agonist such as albuterol for severe bronchospasm ... . Monitor cardiac rhythm and treat arrhythmias as necessary ... . Start IV administration of D5W TKO /SRP: "To keep open", minimal flow rate/. Use 0.9% saline (NS) or lactated Ringer's (LR) if signs of hypovolemia are present. For hypotension with signs of hypovolemia, administer fluid cautiously. Watch for signs of fluid overload ... . Treat seizures with diazepam (Valium) or lorazepam (Ativan) ... . Use proparacaine hydrochloride to assist eye irrigation ... . /Poisons A and B/

来源:Hazardous Substances Data Bank (HSDB)