Abstract
Salivary gland homogenates of the sand fly Phlebotomus papatasi contain large amounts of adenosine and 5'-AMP, of the order of 1 nmol per pair of glands, as demonstrated by liquid chromatography, ultraviolet spectrometry, mass spectrometry and bioassays. These purines, 75-80 % of which are secreted from the glands following a blood meal, have vasodilatory and anti-platelet activities and probably help the fly to obtain a blood meal. Salivary 5'-AMP is also responsible for the previously reported protein phosphatase inhibitor in the salivary glands of P. papatasi, which is shown to be artifactual in nature as a result of allosteric modification by AMP of the phosphatase substrate used (phosphorylase a).
Publication types
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Research Support, Non-U.S. Gov't
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Research Support, U.S. Gov't, P.H.S.
MeSH terms
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Adenosine / analysis*
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Adenosine / metabolism
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Adenosine / pharmacology
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Adenosine Monophosphate / analysis*
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Adenosine Monophosphate / metabolism
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Adenosine Monophosphate / pharmacology
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Animals
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Biological Assay
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Blood
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Chromatography, High Pressure Liquid
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Enzyme Inhibitors
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Female
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Food
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Macrophages / enzymology
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Mass Spectrometry
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Mice
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Mice, Inbred C3H
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Phlebotomus / metabolism*
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Phosphoprotein Phosphatases / antagonists & inhibitors
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Platelet Aggregation Inhibitors
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Rabbits
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Salivary Glands / chemistry*
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Salivary Glands / metabolism
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Vasodilator Agents
Substances
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Enzyme Inhibitors
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Platelet Aggregation Inhibitors
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Vasodilator Agents
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Adenosine Monophosphate
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Phosphoprotein Phosphatases
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Adenosine