Etherlipid-containing multiple lipid liposomes
First Claim
Patent Images
1. A liposome having a lipid bilayer which comprises:
- (a) a phosphatidylcholine;
(b) a sterol;
(c) a headgroup-derivatized lipid comprising a phosphatidylethanolamine linked at the ethanolamine group to a dicarboxylic acid; and
, (d) an etherlipid having the formula;
wherein R1 is Y1 Y2, Y2 is CH3 or CO2H, Y1 is (CH2)n1 (CH═
CH)n2(CH2)n3(CH═
CH)n4 (CH2)n5(CH═
CH)n6 (CH2)n7(CH═
CH)n8(CH2)n9, the sum of n1+2n2+n3+2n4+n5+2n6+n7+2n8+n9 is an integer of from 3 to 23, n1 is zero or an integer of from 1 to 23, n3 is zero or an integer of from 1 to 20, n5 is zero or an integer of from 1 to 17, n7 is zero or an integer of from 1 to 14, n9 is zero or an integer of from 1 to 11, and each of n2, n4, n6 and 8 n8 is independently zero or 1;
wherein Z is oxygen or sulfur and R2 is CH3;
wherein R3 is —
O—
P(O)2—
O—
CH2CH2N(CH3)3;
and wherein the phosphatidylethanolamine-dicarboxylic acid comprises from about 5 mole percent to about 20 mole percent of the lipid bilayer and the etherlipid comprises from greater than about 10 mole percent to less than about 30 mole percent of the lipid bilayer.
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Abstract
Described herein are liposomes containing etherlipids of the formula:
as well as a phosphatidylcholine, a sterol, and a headgroup-derivatized lipid. These liposomes are useful in a variety of therapeutic regimens, including the treatment of cancers and inflammatory disorders.
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Citations
31 Claims
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1. A liposome having a lipid bilayer which comprises:
- (a) a phosphatidylcholine;
(b) a sterol;
(c) a headgroup-derivatized lipid comprising a phosphatidylethanolamine linked at the ethanolamine group to a dicarboxylic acid; and
, (d) an etherlipid having the formula;
wherein R1 is Y1 Y2, Y2 is CH3 or CO2H, Y1 is (CH2)n1 (CH═
CH)n2(CH2)n3(CH═
CH)n4 (CH2)n5(CH═
CH)n6 (CH2)n7(CH═
CH)n8(CH2)n9, the sum of n1+2n2+n3+2n4+n5+2n6+n7+2n8+n9 is an integer of from 3 to 23, n1 is zero or an integer of from 1 to 23, n3 is zero or an integer of from 1 to 20, n5 is zero or an integer of from 1 to 17, n7 is zero or an integer of from 1 to 14, n9 is zero or an integer of from 1 to 11, and each of n2, n4, n6 and 8 n8 is independently zero or 1;wherein Z is oxygen or sulfur and R2 is CH3;
wherein R3 is —
O—
P(O)2—
O—
CH2CH2N(CH3)3;
and wherein the phosphatidylethanolamine-dicarboxylic acid comprises from about 5 mole percent to about 20 mole percent of the lipid bilayer and the etherlipid comprises from greater than about 10 mole percent to less than about 30 mole percent of the lipid bilayer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
- (a) a phosphatidylcholine;
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17. A liposome having a lipid bilayer which comprises:
- (a) a phosphatidylcholine;
(b) a sterol;
(c) a headgroup-derivatized lipid comprising a phosphatidylethanolamine linked at the ethanolamine group to a dicarboxylic acid; and
, (d) an etherlipid having the formula;wherein R1 is Y1 Y2, Y2 is CH3 or CO2H, Y1 is (CH2)n1(CH═
CH)n2(CH2)n3(CH═
CH)n4(CH2)n5(CH═
CH)n6(CH2)n7(CH═
CH)n8(CH2)n9, the sum of n1+2n2+n3+2n4+n5+2n6+n7+2n8+n9 is an integer of from 3 to 23, n1 is zero or an integer of from 1 to 23, n3 is zero or an integer of from 1 to 20, n5 is zero or an integer of from 1 to 17, n7 is zero or an integer of from 1 to 14, n9 is zero or an integer of from 1 to 11, and each of n2, n4, n6 and n8 is independently zero or 1;
wherein Z is NH2,C(O)O2 or HNC(O);
R2 is CH3;
R3 is —
O—
P(O)2—
O—
CH2CH2N(CH3)3; and
wherein the phosphatidylethanolamine-dicarboxylic acid comprises from about 5 mole percent to about 20 mole percent of the lipid bilayer and the etherlipid comprises from greater than about 10 mole percent to less than about 30 mole percent of the lipid bilayer. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
- (a) a phosphatidylcholine;
Specification