Organ arrest, protection and preservation
The present invention relates to a method for arresting, protecting and/or preserving an organ which includes administering effective amounts of (I) a potassium channel opener or agonist and/or an adenosine receptor agonist and (II) local anaesthetic to a subject in need thereof. The present invention also relates to a method for arresting, protecting and/or preserving an organ which comprises adding a composition which includes effective amounts of (I) a potassium channel opener or agonist and/or an adenosine receptor agonist and (II) a local anaesthetic to the organ. The present invention further provides a pharmaceutical or veterinary composition which includes effective amounts of (I) a potassium channel opener or agonist and/or an adenosine receptor agonist and (II) a local anaesthetic.
1. A composition comprising:
a pharmaceutically acceptable carrier;
a compound chosen from a potassium channel opener, a potassium channel agonist and an adenosine receptor agonist; and
a local anesthetic;
wherein the compound and the local anesthetic are present in the composition in amounts sufficient to arrest the heart; and
wherein the pharmaceutically acceptable carrier includes potassium at a concentration of less than about 10 mM.
2. The composition of claim 1 , wherein the potassium channel opener or potassium channel agonist is selected from nicorandil, diazoxide, minoxidil, pinicadil, aprikalim, cromokulim, NS-1619 (1,3-dihydro 1-[2-hydroxy5(trifluoromethyl)phenyl]5-(trifluoromethyl)2—H-benimidazol-one), amlodipine, Bay K 8644(L-type)(1,4-dihydro-26-dimethyl-5-nitro-4[2(trifluoromethyl)phenyl]-3-pyridine carboxylic acid (methyl ester)), bepridil HCl (L-type), calciseptine (L-type), omega-conotoxin GVIA (N-type), omega-conotoxin MVIIC(Q-type), cyproheptadine HCl, dantrolene sodium (Ca 2+ release inhibitor), diltiazem HCl (L-type), filodipine, flunarizine HCl (Ca 2+ /Na + ), fluspirilene (L-type), HA-1077 2 HCl(1-(5isoquinolinyl sulphonyl) homo piperazine HCl), isradipine, loperamide HCl, manoalide (Ca 2+ release inhibitor), nicardipine HCl (L-type), nifedipine (L-type), niguldipine HCl (L-type), nimodipine (L-type), nitrendipine (L-type), pimozide (L- and T-type), ruthenium red, ryanodine (SR channels), taicatoxin, verapamil HCl (L-type), methoxy-verapamil HCl (L-type), YS-035 HCl (L-type)N[2(3,4 dimethoxyphenyl)ethyl]-3,4-dimethoxy N-methyl benzene ethaneamine HCl) and AV blockers.
3. The composition of claim 2 , wherein the AV blocker is adenosine.
4. The composition of claim 1 , wherein the adenosine receptor agonist is selected from N 6 -cyclopentyladenosine (CPA), N-ethylcarboxamido adenosine (NECA),2-[p-(2-carboxyethyl)phenethyl-amino-5′-N-ethylcarboxamido adenosine (CGS-21680), 2-chloroadenosine, N 6 -[2-(3,5-dimethoxyphenyl)-2-(2-methoxyphenyl]ethyladenosine, 2-chloro-N 6 cyclopentyladenosine (CCPA), N-(4-aminobenzyl)9-[5-(methylcarbonyl)-beta-D-robofuranosyl]-adenine (AB-MECA), ([IS-[1a,2b,3b,4a(S*)]]-4-(7-[[2-(3-chloro-2-thienyl)-1-methyl-propyl]amino]-3H-imidazole[4,5-b]pyridyl-3-yl]cyclopentane carboxamide(AMP579, N 6 -(R)-phenylisopropyladenosine (R-PLA), aminophenylethyladenosine [9](APNEA) and cyclohexyladenosine (CHA).
5. The composition of claim 1 , wherein the local anesthetic is selected from mexiletine, diphenylhydantoin, prilocaine, procaine, mepivacaine and Class 1 B antiarrhythmic agents.
6. The composition of claim 5 , wherein the Class 1 B antiarrhythmic agents is lignocaine.
7. The composition of claim 1 , wherein the pharmaceutically acceptable carrier comprises a buffer which maintains the pH of the composition in the range from about 6 to about 9.
8. The composition of claim 7 , wherein the buffer is selected from the group consisting of Krebs-Henseleit, St. Thomas No. 2 solution, Tyrodes solution, Fremes solution, Hartmanns solution and Ringers-Lactate.
9. The composition of claim 1 , wherein the pharmaceutically acceptable carrier comprises magnesium having a concentration of about 2.5 mM.
10. The composition of claim 1 , further comprising a medicament chosen from dipyridamole and a clot-busting drug.
11. The composition of claim 10 , wherein the clot-busting drug is streptokinase.
12. A method for arresting, preserving, and/or protecting an organ comprising adding or administering an effective amount of a composition according to claim 1 .
13. The method of claim 12 , wherein the organ is a heart either intact in the body of a subject or isolated.
14. The method of claim 13 , wherein the heart is arrested during open-heart surgery.
15. A method according to claim 13 , comprising arresting the heart with the composition.
16. A method according to claim 15 , further comprising preserving and/or protecting the heart with the composition.
17. A method according to claim 12 , wherein the potassium channel opener or potassium channel agonist is selected from nicorandil, diazoxide, minoxidil, pinicadil, aprikalim, cromokulim, NS-1619 (1,3-dihydro-1-[2-hydroxy5(trifluoromethyl)phenyl]5-(trifluoromethyl)2—H-benimidazol-one), amlodipine, Bay K 8644(L-type)(1,4-dihydro-26-dimethyl-5-nitro-4[2(trifluoromethyl)phenyl]-3-pyridine carboxylic acid (methyl ester)), bepridil HCl (L-type), calciseptine (L-type), omega-conotoxin GVIA (N-type), omega-conotoxin MVIIC(Q-type), cyproheptadine HCl, dantrolene sodium (Ca 2+ release inhibitor), diltiazem HCl (L-type), filodipine, flunarizine HCl (Ca 2+ /Na + ), fluspirilene (L-type), HA-1077 2HCl(1-(5 isoquinolinyl sulphonyl) homo piperazine HCl), isradipine, loperamide HCl, manoalide (Ca 2+ release inhibitor), nicardipine HCl (L-type), nifedipine (L-type), niguldipine HCl (L-type), nimodipine (L-type), nitrendipine (L-type), pimozide (L- and T-type), ruthenium red, ryanodine (SR channels), taicatoxin, verapamil HCl (L-type), methoxy-verapamil HCl (L-type), YS-035 HCl (L-type)N[2(3,4-dimethoxyphenyl)ethyl]-3,4-dimethoxy N-methyl benzene ethaneamine HCl) and AV blockers.
18. A method according to claim 12 , wherein the adenosine receptor agonist is selected from N 6 -cyclopentyladenosine (CPA), N-ethylcarboxamido adenosine (NECA), 2-[p-(2-carboxyethyl)phenethyl-amino-5′-N-ethylcarboxamido adenosine (CGS-21680), 2-chloroadenosine, N 6 — [2-(3,5-dimethoxyphenyl)-2-(2-methoxyphenyl]ethyladenosine, 2-chloro-N- 6 -cyclopentyladenosine (CCPA), N-(4-aminobenzyl)-9-[5-(methylcarbonyl)-beta-D-robofuranosyl]-adenine(AB-MECA), ([IS-[1a,2b,3b,4a(S*)]]4-[7-[[2-(3-chloro-2-thienyl) 1-methyl-propyl]amino]-3H-imidazole[4,5-b]pyridyl-3-yl]cyclopentane carboxamide(AMP579, N 6 —(R)-phenylisopropyladenosine (R-PLA), aminophenylethyladenosine [9](APNEA) and cyclohexyladenosine (CHA).
19. A method according to claim 12 , wherein the local anesthetic is selected from mexiletine, diphenylhydantoin, prilocaine, procaine, mepivacaine and Class 1 B antiarrhythmic agents.
20. A method according to claim 12 , comprising a buffer selected from the group consisting of Krebs-Henseleit, St. Thomas No. 2 solution, Tyrodes solution, Fremes solution, Hartmanns solution and Ringers-Lactate.
21. A method according to claim 12 , the composition further comprising a medicament chosen from dipyridamole and a clot-busting drug.