4.抗生素Sulfamethoxazole和Trimethoprim因可分別抑制下列那一組酵素,故可產生抑菌協同 作用?
(A)Dihydropteroate synthase;Dihydrofolate reductase
(B)DNA gyrase;Transpeptidase
(C)Dihyrofolate reductase;Thymidylate synthase
(D)Transpeptidase;Dihydropteroate synthase
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統計: A(5806), B(335), C(1183), D(248), E(0) #722391
統計: A(5806), B(335), C(1183), D(248), E(0) #722391
詳解 (共 10 筆)
#1426411
抑 dihydropteroate synthetase : Sulfonamides、Dapsone(痲瘋藥)
抑 dihydrofolate reductase (DHFR) : Trimethoprim、Methotrexate
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#1362753
Sulfamethoxazole→抑制二氫蝶酸合成酶(dihydropteroate synthetase)
trimethoprim→抑制二氫葉酸還原酶(dihydrofolate reductase)
這兩個作用的酵素易混淆,記憶法:看到Sulfamethoxazole的S想到蝴蝶的翅膀形狀→二氫蝶酸
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#1119742
Dihydropteroate synthase inhibitors: Sulfamethoxazole
Dihydrofolate reductase inhibitors: Trimethoprim
DNA gyrase inhibitors: Fluoroquinolones
Transpeptidase inhibitors: Penicillins and Cephalosporins
Thymidylate synthase inhibitors: Fluorouracil
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#2921138
抑制 dihydrofolate reductase (DHFR) 的除了Trimethoprim,
還有Pyrimethamine、Chlorguanide
併用抑制Dihydropteroate synthase及抑制DHFR的藥物可以起雙重阻斷效果,使作用增加。
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