American University of Health Sciences, Signal Hill, CA, 90755, USA.
University of California, Irvine, CA, USA.
Inflammopharmacology. 2024 Dec;32(6):3739-3744. doi: 10.1007/s10787-024-01551-7. Epub 2024 Sep 12.
Cysteamine (CA) induces duodenal ulcers in rodents (Selye and Szabo, Nature 244:458-459, 1973). Cysteine (Cys), a precursor for the formation of CA (via catabolism of coenzyme A), does not cause lesions in the duodenum (Szabo et al., J Pharmacol Exp Ther 223:68-76, 1982). CA also has antimutagenic and anticancer pharmacology (Fujisawa et al., PLoS ONE 7, 2012; Lee, Adv Pharmacol Pharm Sci 2023:2419444, 2023). We propose a mechanism of CA-induced cell death dependent on oxygen and CA dioxygenase (ADO) that can explain the 50-year-old mystery as to why CA is, but Cys is not, ulcerogenic. Those cells expressing coenzyme A-catabolizing enzymes are subject to a unique type of oxygen- and enzyme-bound-Fe-dependent death, type II ferroptosis.
半胱胺(CA)可诱导啮齿动物发生十二指肠溃疡(Selye 和 Szabo,《自然》244:458-459, 1973)。半胱氨酸(Cys)是 CA 形成的前体(通过辅酶 A 的分解代谢),不会在十二指肠中引起病变(Szabo 等人,《美国药理学与实验治疗学杂志》223:68-76, 1982)。CA 还具有抗突变和抗癌药理学特性(Fujisawa 等人,《公共科学图书馆·综合》7, 2012;Lee,《药理学与药物科学进展》2023:2419444, 2023)。我们提出了一种依赖于氧和 CA 加双氧酶(ADO)的 CA 诱导细胞死亡的机制,该机制可以解释存在 50 年之久的谜团,即为什么 CA 是致溃疡的,但 Cys 不是。那些表达辅酶 A 分解代谢酶的细胞容易受到一种独特的、与氧和酶结合的铁依赖性死亡的影响,即 II 型铁死亡。