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Wyszukujesz frazę "Rozalski, Marcin" wg kryterium: Autor


Wyświetlanie 1-2 z 2
Tytuł:
Adenosine diphosphate receptors on blood platelets - potential new targets for antiplatelet therapy
Autorzy:
Rozalski, Marcin
Nocun, Marek
Watala, Cezary
Powiązania:
https://bibliotekanauki.pl/articles/1041421.pdf
Data publikacji:
2005
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
P2Y12
ADP antagonists
ADP receptors
P2Y1
platelet
antiplatelet therapy
Opis:
Platelets play a key role not only in physiological haemostasis, but also under pathological conditions such as thrombosis. Platelet activation may be initiated by a variety of agonists including thrombin, collagen, thromboxane or adenosine diphosphate (ADP). Although ADP is regarded as a weak agonist of blood platelets, it remains an important mediator of platelet activation evoked by other agonists, which induce massive ADP release from dense granules, where it occurs in molar concentrations. Thus, ADP action underlies a positive feedback that facilitates further platelet aggregation and leads to platelet plug formation. Additionally, ADP acts synergistically to other, even weak, agonists such as serotonin, adrenaline or chemokines. Blood platelets express two types of P2Y ADP receptors: P2Y_1 and P2Y_12. ADP-dependent platelet aggregation is initiated by the P2Y1 receptor, whereas P2Y_12 receptor augments the activating signal and promotes platelet release reaction. Stimulation of P2Y_12 is also essential for ADP-mediated complete activation of GPIIb-IIIa and GPIa-IIa, and further stabilization of platelet aggregates. The crucial role in blood platelet biology makes P2_Y12 an ideal candidate for pharmacological approaches for anti-platelet therapy.
Źródło:
Acta Biochimica Polonica; 2005, 52, 2; 411-415
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Inhibition of collagen-induced platelet reactivity by DGEA peptide.
Autorzy:
Luzak, Boguslawa
Golanski, Jacek
Rozalski, Marcin
Boncler, Magdalena
Watala, Cezary
Powiązania:
https://bibliotekanauki.pl/articles/1043398.pdf
Data publikacji:
2003
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
collagen
platelet receptor antagonists
collagen receptors
GPIaIIa
DGEA
platelet reactivity
Opis:
Direct interactions between collagen, the most thrombogenic component of the extracellular matrix, and platelet surface membrane receptors mediate platelet adhesion and induce platelet activation and aggregation. In this process two glycoproteins are crucial: integrin α2β1, an adhesive receptor, and GPVI, which is especially responsible for signal transduction. Specific antagonists of the collagen receptors are useful tools for investigating the complexity of platelet-collagen interactions. In this work we assessed the usefulness of DGEA peptide (Asp-Gly-Glu-Ala), the shortest collagen type I-derived motif recognised by the collagen-binding integrin α2β1, as a potential antagonist of collagen receptors. We examined platelet function using several methods including platelet adhesion under static conditions, platelet function analyser PFA-100TM, whole blood electric impedance aggregometry (WBEA) and flow cytometry. We found that DGEA significantly inhibited adhesion, aggregation and release reaction of collagen activated blood platelets. The inhibitory effect of DGEA on static platelet adhesion reached sub-maximal values at millimolar inhibitor concentrations, whereas the specific blocker of α2β1 - monoclonal antibodies Gi9, when used at saturating concentrations, had only a moderate inhibitory effect on platelet adhesion. Considering that 25-30% of total collagen binding to α2β1 is specific, we conclude that DGEA is a strong antagonist interfering with a variety of collagen-platelet interactions, and it can be recognised not only by the primary platelet adhesion receptor α2β1 but also by other collagen receptors.
Źródło:
Acta Biochimica Polonica; 2003, 50, 4; 1119-1128
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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