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J. van Marle T. Piek H. Karst A. Lind J. van Weeren-Kramer 《Cellular and molecular life sciences : CMLS》1989,45(2):155-156
In contrast to the reported effects of polyamines on the high affinity neurotransmitter uptake, two polyamine-like spider toxins significantly increase the high affinity uptake of glutamate as demonstrated with high resolution autoradiography. The effects of both spider toxins were compared to those of a polyamine toxin from the waspPhilanthus triangulum, which is known to inhibit the high affinity glutamate uptake. 相似文献
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Two components of the venom of the predatory wasp Philanthus triangulum F. significantly reduce--to a greater or less extent--the high affinity uptake of glutamate in rat hippocampus. A concentration of 10 microM delta-PTX caused a reduction of 74%, while the other component, beta-PTX, at the same concentration, caused a reduction of 18%. Hence the effect of delta-PTX on high affinity glutamate uptake in the hippocampus is comparable with its effect on high affinity glutamate uptake in insect neuromuscular junctions. Contrary to our previous findings that beta-PTX has no effect on high affinity glutamate uptake in insect glutamatergic terminal axons, however, beta-PTX significantly reduces high affinity glutamate uptake in the hippocampus, albeit less effectively than delta-PTX. 相似文献
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T. Piek 《Cellular and molecular life sciences : CMLS》1966,22(7):462-463
Zusammenfassung Es wird gezeigt, dass das Gift der Wespe Philanthus triangulum F. bei der Heuschrecke eine reversible Muskellähmung bewirkt, die auf einer Blockierung der Axon-Muskel-Synapse der «schnellen» Faser beruht. Die Synapse der langsamen und hemmenden Faser wird offenbar nicht beeinflusst.
This work has been supported in part by the European Research Office, United States Army, Frankfurt am Main, Germany.
Acknowledgments: I am indebted to Prof. Dr. C.van der Meer for his constant help and criticism and to Dr. R. T.Simon Thomas for providing the wasps. I wish to thank Mr. E.Engels for all the technical work. 相似文献
This work has been supported in part by the European Research Office, United States Army, Frankfurt am Main, Germany.
Acknowledgments: I am indebted to Prof. Dr. C.van der Meer for his constant help and criticism and to Dr. R. T.Simon Thomas for providing the wasps. I wish to thank Mr. E.Engels for all the technical work. 相似文献
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P Dutta G Courties Y Wei F Leuschner R Gorbatov CS Robbins Y Iwamoto B Thompson AL Carlson T Heidt MD Majmudar F Lasitschka M Etzrodt P Waterman MT Waring AT Chicoine AM van der Laan HW Niessen JJ Piek BB Rubin J Butany JR Stone HA Katus SA Murphy DA Morrow MS Sabatine C Vinegoni MA Moskowitz MJ Pittet P Libby CP Lin FK Swirski R Weissleder M Nahrendorf 《Nature》2012,487(7407):325-329
During progression of atherosclerosis, myeloid cells destabilize lipid-rich plaques in the arterial wall and cause their rupture, thus triggering myocardial infarction and stroke. Survivors of acute coronary syndromes have a high risk of recurrent events for unknown reasons. Here we show that the systemic response to ischaemic injury aggravates chronic atherosclerosis. After myocardial infarction or stroke, Apoe-/- mice developed larger atherosclerotic lesions with a more advanced morphology. This disease acceleration persisted over many weeks and was associated with markedly increased monocyte recruitment. Seeking the source of surplus monocytes in plaques, we found that myocardial infarction liberated haematopoietic stem and progenitor cells from bone marrow niches via sympathetic nervous system signalling. The progenitors then seeded the spleen, yielding a sustained boost in monocyte production. These observations provide new mechanistic insight into atherogenesis and provide a novel therapeutic opportunity to mitigate disease progression. 相似文献
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J. van Marle T. Piek A. Lind J. van Weeren-Kramer 《Cellular and molecular life sciences : CMLS》1986,42(2):157-158
Summary Two components of the venom of the predatory waspPhilanthus triangulum F. significantly reduce — to a greater or less extent — the high affinity uptake of glutamate in rat hippocampus. A concentration of 10 M -PTX caused a reduction of 74%, while the other component, -PTX, at the same concentration, caused a reduction of 18%. Hence the effect of -PTX on high affinity glutamate uptake in the hippocampus is comparable with its effect on high affinity glutamate uptake in insect neuromuscular junctions. Contrary to our previous findings that -PTX has no effect on high affinity glutamate uptake in insect glutamatergic terminal axons, however, -PTX significantly reduces high affinity glutamate uptake in the hippocampus, albeit less effectively than -PTX. 相似文献
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In contrast to the reported effects of polyamines on the high affinity neurotransmitter uptake, two polyamine-like spider toxins significantly increase the high affinity uptake of glutamate as demonstrated with high resolution autoradiography. The effects of both spider toxins were compared to those of a polyamine toxin from the wasp Philanthus triangulum, which is known to inhibit the high affinity glutamate uptake. 相似文献
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