Methods and solutions for storing donor organs
A method of preserving, storing and transplanting mammalian donor organs. The method includes the cooling of refrigeration preservation, loading pre-freezer preservation, cryopreservation and washing solutions at least containing polyvinylpyrrolidone, a calcium channel blocker, a nucleoside, potassium chloride, polyethylene glycol, at least one amino acid, and a steroid to a temperature of 2° to 4° C. and/or of 0° to 2° C., harvesting a donor organ, perfusing it with one or more of the solution, immersing it in one or more of the solutions and storing it at a temperature above 0° C. or at a temperatures below 0° C. The cryopreservation solution also contains cryopreservative agents. Preserved organs may be transplanted directly from refrigeration storage or from freezer storage by cooling the washing refrigeration preservation solutions to 2° to 4° C., perfusing the organ with washing solution and then preservation solution, and transplanting it.
1. A method of preserving at freezer temperatures mammalian donor organs for transplantation comprising:
cooling a loading, pre-freezer preservation solution at least containing polyvinylpyrrolidone -40, a calcium channel blocker, a nucleoside, potassium chloride, polyethylene glycol, at least one amino acid and a steroid to a temperature between 2° C. and 4° C.;
cooling a quantity of the loading, prefreezer preservation solution to a temperature between 0° C. and 2° C.;
cooling a cryopreservation solution at least containing polyvinylpyrrolidone -40, a calcium channel blocker, a nucleoside, potassium chloride, polyethylene glycol, at least one amino acid, a steroid, glycerol, propanediol, an alcohol and an alkyl sulfoxide to a temperature between 0° C. and 2° C.;
inserting a needle into the isolated arterial system of the donor organ before removal from a donor;
infusing the donor organ with the loading, pre-freezer preservation solution cooled to a temperature between 2° C. and 4° C. through the needle;
harvesting the donor organ;
immersing for 10 minutes or longer the donor organ in the loading, pre-freezer preservation solution cooled to a temperature between 0° to 2° C.;
infusing the donor organ with the cryopreservation solution cooled to a temperature between 0° to 2° C. through the needle in a gradual manner;
immersing for 10 minutes or longer the donor organ in the cryopreservation solution cooled to a temperature of 0° C. to 2° C.;
storing the donor organ in the cryopreservation solution at a temperature below 0° C.
2. The method of claim 1 including the further steps of
storing the donor organ at a temperature below 0° C. for 8 hours or more; and
transferring the donor organ to a cryofreezer temperature of about −80° C.
3. The method of claim 1 wherein the calcium channel blocker is verapamil.
4. The method of claim 1 wherein the nucleoside is adenosine.
5. The method of claim 1 wherein the amino acid or amino acids are selected from a group consisting of N-acetylcysteine, glycine, arginine, proline, glutamate, serine, alanine, histidine, leucine, methionine, phenylalanine and tryptophan.
6. The method of claim 1 wherein the steroid is dexamethasone.
7. The method of claim 1 wherein the loading pre-freezer preservation solution and the cryopreservation solution each have a pH between 7.0 and 7.5.
8. The method of claim 1 wherein the donor organ is a mammalian heart, liver, kidney, or pancreas.
9. A method of transplanting a donor organ that has been preserved according to claim 1 , comprising
cooling a washing solution at least containing (PVP-40), a calcium channel blocker, a nucleoside, potassium chloride, polyethylene glycol, at least one amino acid, a steroid, glycerol, propanediol, an alcohol and an alkyl sulfoxide to a temperature between 2° and 4° C.
cooling a refrigeration preservation solution to a temperature between 2° and 4° C.;
removing the donor organ from storage at a temperature below 0° C.;
perfusing the donor organ with the washing solution cooled at 2° to 4° C.;
perfusing the donor organ with the refrigeration preservation solution cooled at 2° and 4° C.; and
transplanting the donor organ.
10. The method of claim 9 wherein the first step of cooling of a washing solution is preceded by the transfer of a donor organ stored at cryofreezer temperatures to storage at freezer temperatures for a period of 8 hours or more.
11. The method of claim 9 wherein the calcium channel blocker is verapamil.
12. The method of claim 9 wherein the nucleoside is adenosine.
13. The method of claim 9 wherein the amino acid or amino acids are selected from a group consisting of N-acetylcysteine, glycine, arginine, proline, glutamate, serine, alanine, histidine, leucine, methionine, phenylalanine and tryptophan.
14. The method of claim 9 wherein the steroid is dexamethasone.
15. The method of claim 9 wherein the washing solution has a pH between 7.0 and 7.5.