Effects of Atovaquone and Diospyrin-Based Drugs on the Cellular ATP of Pneumocystis carinii f. sp. carinii (Record no. 42545)

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control field MX-MdCICY
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control field 20250625124716.0
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Transcribing agency CICY
090 ## - LOCALLY ASSIGNED LC-TYPE CALL NUMBER (OCLC); LOCAL CALL NUMBER (RLIN)
Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) B-8239
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245 10 - TITLE STATEMENT
Title Effects of Atovaquone and Diospyrin-Based Drugs on the Cellular ATP of Pneumocystis carinii f. sp. carinii
490 0# - SERIES STATEMENT
Volume/sequential designation Antimicrobial Agents and Chemotherapy, 44(3), p.713-719, 2000
520 3# - SUMMARY, ETC.
Summary, etc. Atovaquone (also called Mepron, or 566C80)is a napthoquinone used for the treatment of infections caused by pathogens such as Plasmodium spp. and Pneumocystis carinii. The mechanism of action against the malarial parasite is the inhibition of dihydroorotate dehydrogenase (DHOD), a consequence of blocking electron transport by the drug. As an analog of ubiquinone (coenzyme Q [CoQ]), atovaquone irreversibly binds to the mitochondrial cytochrome bc1 complex; thus, electrons are not able to pass from dehydrogenase enzymes via CoQ to cytochrome c. Since DHOD is a critical enzyme in pyrimidine biosynthesis, and because the parasite cannot scavenge host pyrimidines, the drug is lethal to the organism. Oxygen consumption in P. carinii is inhibited by the drug; thus, electron transport has also been identified as the drug target in P. carinii. However, unlike Plasmodium DHOD, P. carinii DHOD is inhibited only at high atovaquone concentrations, suggesting that the organism may salvage host pyrimidines and that atovaquone exerts its primary effects on ATP biosynthesis. In the present study, the effect of atovaquone on ATP levels in P. carinii was measured directly from 1 to 6 h and then after 24, 48, and 72 h of exposure. The average 50
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Cushion, M.T.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Collins, M.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Hazra, B.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Kaneshiro, E.S.
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Uniform Resource Identifier <a href="https://drive.google.com/file/d/1e0c4f4TvP6m6Du_gTsn2zxaaaAh66OGn/view?usp=drivesdk">https://drive.google.com/file/d/1e0c4f4TvP6m6Du_gTsn2zxaaaAh66OGn/view?usp=drivesdk</a>
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Source of classification or shelving scheme Clasificación local
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  Clasificación local     Ref1 CICY CICY Documento préstamo interbibliotecario 25.06.2025   B-8239 25.06.2025 25.06.2025 Documentos solicitados