Use of extracellular hemoglobin obtained from the marine worm,
Disclosed is a method for preserving an organ in a donation after brain death donor or a donation after cardiac death donor comprising administering to the donor a composition comprising at least one globin, one globin protomer or one extracellular hemoglobin of Annelida, a stabilizing solution and/or a solution for conserving organs, said composition having a temperature of between 0° C. and 37° C. Also disclosed is a method for conserving an organ in situ in a donation after brain death donor or a donation after cardiac death donor using normothermic ECMO or double-balloon triple-lumen catheter techniques or any other similar technique.
1. A method for preserving an organ for donation after brain or cardiac death in a donor, the method comprising administering to the donor a composition comprising at least one extracellular hemoglobin of Arenicola marina , a stabilizing solution and/or an organ preservation solution, wherein the composition is at a temperature of between 0° C. and 37° C.
2. The method according to claim 1 wherein the stabilizing solution is an aqueous solution comprising salts, and comprises a pH of between 6.5 and 7.6.
3. The method according to claim 2 wherein the solution is an aqueous solution comprising chloride, sodium, calcium, magnesium or potassium ions.
4. The method according to claim 1 , wherein the stabilizing solution is an aqueous solution comprising 90 mM of NaCl, 23 mM of Na gluconate, 2.5 mM of CaCl2, 27 mM of Na acetate, 1.5 mM of MgCl2, 5 mM of KCl, and a pH of 7.1±0.5.
5. The method according to claim 1 , wherein the organ preservation solution is an aqueous solution having a pH of between 6.5 and 7.5 and comprising salts; sugars; antioxidants; active agents.
6. The method according to claim 5 , wherein the solution is an aqueous solution comprising chloride, sulfate, sodium, calcium, magnesium or potassium ions; sugars selected from mannitol, raffinose, sucrase, glucose, fructose, lactobionate and gluconate; glutathione; active agents selected from xanthine oxidase inhibitors, lactates, and amino acids, and optionally colloids selected from hydroxyethyl starch, polyethylene glycol and dextran.
7. The method according to claim 1 , wherein the extracellular hemoglobin of Arenicola marina is present at a concentration, relative to the final volume of composition, of between 0.001 mg/ml and 100 mg/ml, and in that the composition has an osmolarity of between 250 and 350 mOsm/l.
8. The method according to claim 7 , wherein the extracellular hemoglobin of Arenicola marina is present at a concentration, relative to the final volume of composition, of between 1 mg/ml and 5 mg/ml, and the composition has an osmolarity of between 275 and 310 mOsm/l.
9. A method for preserving an organ ex situ in a donation after brain death donor or a donation after cardiac death donor, comprising the following steps:
a) perfusion of said deceased donor with a composition as defined in claim 1 ; then
b) harvesting of the organ to be transplanted; then
c) static or dynamic-perfusion preservation of said organ obtained in b), at a temperature of between 0° C. and 37° C., for a time predetermined according to said organ, in the composition or the aqueous solution defined in step a).