Abstract:
Heparin binds antithrombin and increases more than thousand times the rate of the anticoagulant activity. Another activity of heparin is the inhibition of the human complement system. The results from several laboratories have shown that both biological activities of heparin are independent. The main aim of this work was to study how heparin and antithrombin recognize each other. First experiments were done with the system heparin and Concanavalin A. The lectin recognizes and precipitates the fraction of the heparin molecule with high affinity for antithrombin, and high anticoagulant activity. Low ionic strength and the presence of calcium ions are absolute requirements for the recognition. When, instead of Con A, the first component of the complement system was used for the interaction, and under similar and very specific conditions, again precipitate the fraction of heparin with high affinity for antithrombin and high anticoagulant activity. The conclusion is that both heparin biological activities reside in the same limited fraction of the molecule which containes the segment with high affinity for antitrombin. These results are in opposition with most reported in the literature, but we have demonstrated that specific interactions between macromolecules only detect it under very low ionic strength, and in the presence of calcium ions.
Registro:
Documento: |
Artículo
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Título: | The active fraction of heparin enclose both properties: Anticoagulant and anticomplement |
Autor: | Recondo, E.F.; Calabrese, G.; Fernández, M.E. |
Filiación: | Depto. de Quím. Biol., Fac. de Ciencias Exactas y Naturales, Ciudad Universitaria, Nunez, (1428), Buenos Aires, Argentina Depto. de Ciencias Biológicas, Fac. de Farmacia y Bioquímica, Universidad de Buenos Aires, Junín 954, (1110), Buenos Aires, Argentina
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Palabras clave: | Calcium ions; First component of the complement system; Heparin; Low ionic strength; Molecular interactions; anticoagulant agent; calcium ion; complement inhibitor; concanavalin A; heparin; anticoagulation; article; complement inhibition; complement system; controlled study; human; ionic strength; molecular interaction; precipitation |
Año: | 2003
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Volumen: | 37
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Número: | 2
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Página de inicio: | 193
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Página de fin: | 201
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Título revista: | Acta Bioquimica Clinica Latinoamericana
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Título revista abreviado: | Acta Bioquim. Clin. Latinoam.
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ISSN: | 03252957
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CODEN: | ABCLD
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CAS: | calcium ion, 14127-61-8; concanavalin A, 11028-71-0; heparin, 37187-54-5, 8057-48-5, 8065-01-8, 9005-48-5
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Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03252957_v37_n2_p193_Recondo |
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Citas:
---------- APA ----------
Recondo, E.F., Calabrese, G. & Fernández, M.E.
(2003)
. The active fraction of heparin enclose both properties: Anticoagulant and anticomplement . Acta Bioquimica Clinica Latinoamericana, 37(2), 193-201.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03252957_v37_n2_p193_Recondo [ ]
---------- CHICAGO ----------
Recondo, E.F., Calabrese, G., Fernández, M.E.
"The active fraction of heparin enclose both properties: Anticoagulant and anticomplement "
. Acta Bioquimica Clinica Latinoamericana 37, no. 2
(2003) : 193-201.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03252957_v37_n2_p193_Recondo [ ]
---------- MLA ----------
Recondo, E.F., Calabrese, G., Fernández, M.E.
"The active fraction of heparin enclose both properties: Anticoagulant and anticomplement "
. Acta Bioquimica Clinica Latinoamericana, vol. 37, no. 2, 2003, pp. 193-201.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03252957_v37_n2_p193_Recondo [ ]
---------- VANCOUVER ----------
Recondo, E.F., Calabrese, G., Fernández, M.E. The active fraction of heparin enclose both properties: Anticoagulant and anticomplement . Acta Bioquim. Clin. Latinoam. 2003;37(2):193-201.
Available from: https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03252957_v37_n2_p193_Recondo [ ]