A naturally occurring furocoumarin compound found in several species of plants, including Psoralea corylifolia. It is a photoactive substance that forms DNA adducts in the presence of ultraviolet A irradiation. [PubChem]
Indication
For the treatment of psoriasis and vitiligo
Pharmacology
Methoxsalen selectively inhibits the synthesis of deoxyribonucleic acid (DNA). The guanine and cytosine content correlates with the degree of Methoxsalen-induced cross-linking. At high concentrations of the drug, cellular RNA and protein synthesis are also suppressed.
Affected Organisms
Humans and other mammals
Half Life
Approximately 2 hours
Elimination
In both mice and man, methoxsalen is rapidly metabolized. Approximately 95% of the drug is excreted as a series of metabolites in the urine within 24 hours (Pathak et al. 1977).
Research Area: Inflammation Biological Activity: Methoxsalen (Oxsoralen) a naturally occurring furocoumarin compound found in several species of plants, including Psoralea corylifolia, is a drug used to treat psoriasis, eczema, vitiligo and some cutaneous Lymphomas in conjunction with exposing the skin to sunlight. It is a photoactive substance that forms DNA adducts in the presence of ultraviolet an irradiation. After activation it binds preferentially to the guanine and cytosine moieties of DNA, leading to cross-linking of DNA, thus inhibiting DNA synthesis and function. [1]
Biochem/physiol Actions 8-甲氧基补骨脂素 (8-MOP) 加 A 波紫外线 (UVA) 辐射可诱导单加合物形成和 DNA 链间交联,因此可用于研究 DNA 修复和重组机制。培养的正常人黑素细胞经 8-甲氧基补骨脂素处理和 A 波紫外线 (UVA) 照射后形成 8-甲氧基补骨脂素-磷脂光加成产物,经二酰甘油取代后可在无细胞体系中激活蛋白激酶 C。8-MOP 是纯化重组细胞色素 P450 的灭活剂。它还可以通过抑制 [Ca2+] 的升高,而抑制从 P 物质激活的大鼠腹膜肥大细胞的 P 物质诱导型组胺释放。 Caution 避光。 包装 1, 5 g in glass bottle
Biochem/physiol Actions 8-甲氧基补骨脂素 (8-MOP) 加 A 波紫外线 (UVA) 辐射可诱导单加合物形成和 DNA 链间交联,因此可用于研究 DNA 修复和重组机制。培养的正常人黑素细胞经 8-甲氧基补骨脂素处理和 A 波紫外线 (UVA) 照射后形成 8-甲氧基补骨脂素-磷脂光加成产物,经二酰甘油取代后可在无细胞体系中激活蛋白激酶 C。8-MOP 是纯化重组细胞色素 P450 的灭活剂。它还可以通过抑制 [Ca2+] 的升高,而抑制从 P 物质激活的大鼠腹膜肥大细胞的 P 物质诱导型组胺释放。
Biochem/physiol Actions 8-甲氧基补骨脂素 (8-MOP) 加 A 波紫外线 (UVA) 辐射可诱导单加合物形成和 DNA 链间交联,因此可用于研究 DNA 修复和重组机制。培养的正常人黑素细胞经 8-甲氧基补骨脂素处理和 A 波紫外线 (UVA) 照射后形成 8-甲氧基补骨脂素-磷脂光加成产物,经二酰甘油取代后可在无细胞体系中激活蛋白激酶 C。8-MOP 是纯化重组细胞色素 P450 的灭活剂。它还可以通过抑制 [Ca2+] 的升高,而抑制从 P 物质激活的大鼠腹膜肥大细胞的 P 物质诱导型组胺释放。
Biochem/physiol Actions 8-甲氧基补骨脂素 (8-MOP) 加 A 波紫外线 (UVA) 辐射可诱导单加合物形成和 DNA 链间交联,因此可用于研究 DNA 修复和重组机制。培养的正常人黑素细胞经 8-甲氧基补骨脂素处理和 A 波紫外线 (UVA) 照射后形成 8-甲氧基补骨脂素-磷脂光加成产物,经二酰甘油取代后可在无细胞体系中激活蛋白激酶 C。8-MOP 是纯化重组细胞色素 P450 的灭活剂。它还可以通过抑制 [Ca2+] 的升高,而抑制从 P 物质激活的大鼠腹膜肥大细胞的 P 物质诱导型组胺释放。 Other Notes 特性1;8-甲氧基补骨脂素与小牛胸腺 DNA 的光化学反应2