石膽酸
化合物
石膽酸(英語:Lithocholic acid,也被稱為3α-羥基-5β-膽烷-24-羧酸,3α-hydroxy-5β-cholan-24-oic acid,縮寫LCA)是一種膽汁酸,可作為溶解劑促進脂肪的吸收。結腸中的石膽酸主要來自鵝去氧膽酸,由腸道細菌的酶將其甾體骨架B環上的7α-羥基還原而來。
石膽酸[1] | |
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IUPAC名 (4R)-4-[(3R,5R,8R,9S,10S,13R,14S,17R)-3-Hydroxy-10,13-dimethyl-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl]pentanoic acid | |
別名 | 3α-羥基-5β-膽烷-24-羧酸 LCA |
識別 | |
CAS號 | 434-13-9 |
PubChem | 9903 |
ChemSpider | 9519 |
SMILES |
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InChI |
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InChIKey | SMEROWZSTRWXGI-HVATVPOCBI |
EINECS | 207-099-1 |
ChEBI | 16325 |
RTECS | FZ2275000 |
IUPHAR配體 | 611 |
性質 | |
化學式 | C24H40O3 |
摩爾質量 | 376.57 g·mol⁻¹ |
熔點 | 183—188 °C(361—370 °F;456—461 K) |
危險性 | |
安全術語 | S:S22 S24/25 |
若非註明,所有數據均出自標準狀態(25 ℃,100 kPa)下。 |
石膽酸已證明對實驗動物和人類具有致癌性[2]。初步的 in vitro 實驗發現石膽酸可以選擇性的殺死成神經細胞瘤細胞,同時保留正常的神經元細胞,並且在生理相關濃度下對許多其他惡性細胞類型具有細胞毒性[3]。
參考文獻
- ^ Lithocholic acid (頁面存檔備份,存於互聯網檔案館) at Sigma-Aldrich
- ^ Kozoni, V.; Tsioulias, G; Shiff, S; Rigas, B. The effect of lithocholic acid on proliferation and apoptosis during the early stages of colon carcinogenesis: Differential effect on apoptosis in the presence of a colon carcinogen. Carcinogenesis. 2000, 21 (5): 999–1005. PMID 10783324. doi:10.1093/carcin/21.5.999.
- ^ Goldberg, AA; Beach, A; Davies, GF; Harkness, TA; Leblanc, A; Titorenko, VI. Lithocholic bile acid selectively kills neuroblastoma cells, while sparing normal neuronal cells. Oncotarget. 2011, 2 (10): 761–82. PMC 3248158 . PMID 21992775. doi:10.18632/oncotarget.338.
延伸閱讀
- Goldberg, AA; Richard, VR; Kyryakov, P; Bourque, SD; Beach, A; Burstein, MT; Glebov, A; Koupaki, O; et al. Chemical genetic screen identifies lithocholic acid as an anti-aging compound that extends yeast chronological life span in a TOR-independent manner, by modulating housekeeping longevity assurance processes. Aging. 2010, 2 (7): 393–414. PMC 2933888 . PMID 20622262.