par Bizumukama, Leonidas 
;Ferster, Alina ;Gulbis, Béatrice ;Kumps, Alain ;Cotton, Frédéric
Référence European journal of pharmacology, 665, 1-3, page (13-18)
Publication Publié, 2011-08
;Ferster, Alina ;Gulbis, Béatrice ;Kumps, Alain ;Cotton, Frédéric Référence European journal of pharmacology, 665, 1-3, page (13-18)
Publication Publié, 2011-08
Article révisé par les pairs
| Résumé : | In the present work, we explored the way in which cromoglycate, a drug used to treat allergies acts on ion movements in sickle cells. Cells were either slowly deoxygenated by overnight exposure to nitrogen or acutely deoxygenated by exposure to metabisulfite, a strong reducing agent which induces sickling of red blood sickle cells. Flushing the cells with nitrogen increased the intracellular concentration of Na(+) and decreased the intracellular concentration of K(+) and the sum of the concentrations of the two cations. One hundred nM cromoglycate inhibited the decrease of intracellular K(+) and the increase of intracellular Na(+) induced by deoxygenation (n=17). Metabisulfite (100mM) increased the intracellular concentration of Ca(2+) (measured by Fura Red) (n=15) and the shape of the cells (measured by light scattering) (n=9). One μM cromoglycate partially inhibited these two responses. In conclusion, cromoglycate partially inhibits abnormal K(+) loss, Ca(2+) entry pathways or Ca(2+) channels opened by cell deoxygenation and ensuing membrane modifications and prevents cell sickling. |
