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The kinetics of chondroitin 4-sulfate release from stimulated platelets and its relation to thromboxane A2 formation and granule secretion
Rev. bras. pesqui. méd. biol ; Braz. j. med. biol. res;27(9): 2163-7, Sept. 1994. graf
Article de En | LILACS | ID: lil-144468
Bibliothèque responsable: BR1.1
ABSTRACT
1. In platelet rich plasma (PRP), chondroitin 4-sulfate release from platelets occurred after stimulation with ADP (5µM), collagen (5-10µM). Release started within 60 s and maximum release (0.7-2.0 mg/l) was reached within 180 s. TXA2 formation and dense granule release reached a maximum within 90 s after stimulation. 2. Using washed platelets (1.5 x 10**8 cells/ml), the platelet responses were faster. Release of chondroitin 4-sulfate and TXA2 started within 20-30 s after thrombin addition (100 mU/ml). Maximum release was reached within 60 s in both cases. Dense granule release started in the first 5 s of stimulation (34.6 ñ 12.4 por cento) reaching maximum secretion (74.4 ñ 8.7 por cento) within 60 s. 3. Our results demonstrate that maximal chondroitin 4-sulfate release occurs after the dense granule release reaction in both PRP and washed platelets. This observation suggests that chondroitin 4-sulfates is unlikely to be stored in the dense granules but may be stored in the alfagranules
Sujet(s)
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Indice: LILACS Sujet Principal: Thromboxane A2 / Plaquettes / Chondroïtines sulfate / Granulations cytoplasmiques Limites du sujet: Humans langue: En Texte intégral: Braz. j. med. biol. res / Rev. bras. pesqui. méd. biol Thème du journal: BIOLOGIA / MEDICINA Année: 1994 Type: Article / Congress and conference
Recherche sur Google
Indice: LILACS Sujet Principal: Thromboxane A2 / Plaquettes / Chondroïtines sulfate / Granulations cytoplasmiques Limites du sujet: Humans langue: En Texte intégral: Braz. j. med. biol. res / Rev. bras. pesqui. méd. biol Thème du journal: BIOLOGIA / MEDICINA Année: 1994 Type: Article / Congress and conference