Regiospecific hydroxylation of lauric acid at the (omega-1) position by hepatic and kidney microsomal cytochromes P-450 from rainbow trout.

Regiospecific hydroxylation of lauric acid at the (omega-1) position by hepatic and kidney microsomal cytochromes P-450 from rainbow trout.
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虹鳟鱼肝和肾微粒体细胞色素 P-450 对月桂酸在 (omega-1) 位置进行区域特异性羟基化。

DOI:
10.1016/0003-9861(84)90414-4
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发表时间:
1984
影响因子:
3.9
通讯作者:
Masters,BS
Masters,BS
中科院分区:
生物学3区
文献类型:
--
作者:
Williams,DE;Okita,RT;Buhler,DR;Masters,BS

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来自未经处理的虹鳟鱼肝脏或肾脏的微粒体,羟基化的月桂酸专门位于 (ω-1) 位。用β-萘黄酮治疗后,肝脏(2.72 min−1)和肾脏(14.1 min−1)的周转数分别减少了七倍和两倍。未经处理的鳟鱼肝微粒体的月桂酸羟基化活性对 SKF-525A 的抑制敏感,但对甲吡酮不敏感,并且仅被 α-萘黄酮部分抑制。鳟鱼肝微粒体中月桂酸酯(ω-1)羟基化的最适温度为 25–30 °C。未处理的鳟鱼微粒体中,(ω-1)-羟基月桂酸酯形成的 Kman 和 Vmax 在肝脏中分别为 50 μm 和 1.63 nmol min−1mg−1,在肾脏中分别为 20 μm 和 3.95 nmol min−1mg−1。 (ω-1) 肝和肾微粒体中月桂酸的羟基化对针对先前纯化的鳟鱼肝微粒体细胞色素 P-450 同工酶 (LM2) 产生的抗体敏感,该抗体已被证明对黄曲霉毒素 B1 具有活性。由 β-萘黄酮诱导的细胞色素 P-450 主要同工酶(LM4b,对苯并(a)芘有活性)的抗体不会抑制未经处理或经 ω-萘黄酮处理的鳟鱼微粒体中月桂酸酯的 (ω-1) 羟基化。
Microsomes from liver or kidney of untreated rainbow trout hydroxylated lauric acid specifically at the (ω-1) position. Turnover numbers for liver (2.72 min−1) and kidney (14.1 min−1) were decreased seven- and twofold, respectively, following treatment with β-naphthoflavone. Laurate hydroxylation activity from untreated trout hepatic microsomes was sensitive to inhibition by SKF-525A, but was not sensitive to metyrapone and only partially inhibited by α-naphthoflavone. The temperature optimum of laurate (ω-1) hydroxylation in trout liver microsomes was 25–30 °C. TheKmandVmaxfor (ω-1)-hydroxylaurate formation was 50 μmand 1.63 nmol min−1mg−1, respectively, in liver and 20 μmand 3.95 nmol min−1mg−1, respectively, in kidney from untreated trout microsomes. (ω-1) Hydroxylation of laurate, in both liver and kidney microsomes, was sensitive to an antibody raised against a previously purified cytochromeP-450 isozyme (LM2) of trout liver microsomes, which has been shown to be active towards aflatoxin B1. Antibody to the major isozyme of cytochromeP-450 (LM4b, active towards benzo(a)pyrene) induced by β-naphthoflavone did not inhibit (ω-1) hydroxylation of laurate in microsomes from untreated or ω-naphthoflavone-treated trout.
人肝和肾皮质微粒体中的月桂酸羟基化。
DOI: 10.1016/0006-2952(79)90077-7
发表时间: 1979
影响因子: 5.8
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DOI: 10.1111/j.1432-1033.1978.tb12586.x
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作者:
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苯巴比妥治疗和细胞色素 P-450 抑制剂对大鼠肝微粒体月桂酸 omega- 和 (omega-1)-羟化酶活性的影响。
DOI: 10.1124/dmd.8.3.147
发表时间: 1980
期刊: Drug metabolism and disposition: the biological fate of chemicals
影响因子: --
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