Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Liposomes
Reexamination Certificate
2000-07-21
2003-05-27
Kishore, Gollamudi S. (Department: 1615)
Drug, bio-affecting and body treating compositions
Preparations characterized by special physical form
Liposomes
C552S502000, C552S544000, C524S728000, C554S035000, C554S036000, C554S037000, C554S079000
Reexamination Certificate
active
06569450
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to lipid-conjugated polyamide compounds, methods for making them, as well as compositions and methods for their use, such as, for example, in the delivery of biologically active agents to cells.
BACKGROUND OF THE INVENTION
The discovery of new therapeutic agents having increasingly complex molecular structure has presented new challenges related to how they can be efficiently delivered to targeted sites. For example, recent developments in recombinant DNA technology and human genome characterization have enabled identification of the moleculer origins of many genetic and acquired diseases and construction of appropriate plasmids containing desired genes. However, the efficient delivery of these large and heavily charged constructs, having molecular weights of up to tens of millions of daltons and containing several tens of thousands of negative charges into cells remains a substantial challenge. Studies evaluating the use of neutral and cationic liposome structures as vehicles for the delivery of polynucleotides to cells have met with limited success, as these encapsulated structures are rather large and unstable.
Accordingly, compounds that can be used as effective vehicles for the efficient delivery of large complex agents, such as polynucleotides, to cells would be highly desirable.
SUMMARY OF THE INVENTION
The present invention is directed to lipid-conjugated polyamide compounds and compositions thereof that are particularly useful in the delivery of bioactive agents to cells.
Specifically, the present invention provides lipid-conjugated polyamide compounds having the general formula:
wherein n is an integer selected from 1 to about 48 and m is an integer selected from about 2 to about 48,
wherein R
1
for each monomeric unit,
and R
a
are independently selected from the group consisting of a hydrogen atom; a hydroxy group; an amino group; a carboxyl group; a sulfonyl group; -SH; an optionally substituted, branched or straight chain aliphatic group having from about 1 to about 8 carbon atoms in a backbone structure that optionally contains nitrogen, oxygen, sulfur, and phosphorus, wherein said aliphatic group optionally has one or more double or triple bonds; an optionally substituted aryl group having from about 3 to about 12 carbon atoms in a backbone structure that optionally contains nitrogen, oxygen, sulfur, and phosphorus; an optionally substituted arylalkyl group having from about 3 to about 12 carbon atoms in a backbone structure that optionally contains nitrogen, oxygen, sulfur, and phosphorus, wherein the alkyl component of said arylalkyl optionally has one or more double or triple bonds; and a lipid moiety that is optionally bonded to a linker moiety,
wherein R
1
is not a hydrogen atom for at least one monomeric unit, wherein R
c
is selected from a hydrogen atom; a hydroxy group; an amino group; a hydrazine group; a sulfonyl group; —SH; an optionally substituted, branched or straight chain aliphatic group having from 1 to about 8 carbon atoms in a backbone structure that optionally contains nitrogen, oxygen, sulfur, and phosphorus, wherein said aliphatic group optionally has one or more double or triple bonds; an optionally substituted aryl group having from about 3 to about 12 carbon atoms in a backbone structure that optionally contains nitrogen, oxygen, sulfur, and phosphorus; an optionally substituted arylalkyl group having from about 3 to about 12 carbon atoms in a backbone structure that optionally contains nitrogen, oxygen, sulfur, and phosphorus, wherein the alkyl group of said arylalkyl optionally has one or more double or triple bonds; and a lipid moiety that is optionally bonded to a linker moiety,
wherein when R
1
, R
a
, or R
c
is an aryl or arylalkyl group having fewer than about 5 carbon atoms in a backbone structure, said backbone structure further comprises one or more heteroatoms,
wherein W for each monomeric unit is independently selected from an optionally substituted, branched or straight chain divalent moiety having from 1 to about 50 atoms and optionally, one or more double or triple bonds in a backbone that contains carbon and optionally contains nitrogen, oxygen, sulfur, and phosphorus, wherein said optional substitution of W may be a lipid moiety that is optionally bonded to a linker moiety,
wherein said lipid moiety is a hydrophobic or amphipathic moiety selected from the group consisting of:
(i) optionally substituted aryl or arylalkyl moieties having from about 14 to about 50 carbon atoms in a backbone structure that optionally contains nitrogen, oxygen, sulfur, and phosphorus, wherein the alkyl component of said arylalkyl optionally has one or more double or triple bonds; and
(ii) optionally substituted, branched or straight chain aliphatic moieties having from about 10 to about 50 carbon atoms in a backbone structure that optionally contains nitrogen, oxygen, sulfur, and phosphorus, wherein said aliphatic moieties optionally have one or more double or triple bonds, and
wherein at least one of R
a
, R
c
, W for a single monomeric unit and R
1
for a single monomeric unit comprises a lipid moiety optionally bonded to a linker moiety.
The present invention also provides a method of synthesizing lipid-conjugated polyamide compounds, said method comprising:
a) contacting
(1) a lipid reactant, with
(2) an oligomer reactant, wherein said oligomer reactant has the general formula:
wherein n is an integer selected from 1 to about 48, and m is an integer from about 2 to about 48,
wherein each T
a
and T
c
is independently selected from a terminal group and a reactive moiety that is capable of further reaction with said lipid reactant,
wherein R
1
for each monomeric unit,
in said oligomer reactant is selected from the group consisting of a hydrogen atom; a hydroxy group; an amino group; a carboxyl group; a sulfonyl group, —SH; an optionally substituted, branched or straight chain aliphatic group having from 1 to about 8 carbon atoms in a backbone structure that optionally contains nitrogen, oxygen, sulfur, and phosphorus, wherein the aliphatic group optionally has one or more double or triple bonds; an optionally substituted aryl group having from about 3 to about 12 carbon atoms in a backbone structure that optionally contains nitrogen, oxygen, sulfur, and phosphorus; an optionally substituted arylalkyl group having from about 3 to about 12 carbon atoms in a backbone structure that optionally contains nitrogen, oxygen, sulfur, and phosphorus, wherein the alkyl group of said arylalkyl optionally has one or more double or triple bonds; and a reactive moiety that is capable of further reaction with said lipid reactant,
wherein when R
1
, R
a
, or R
c
, is an aryl or arylalkyl group having fewer than about 5 carbon atoms in a backbone structure, said backbone structure further comprises one or more heteroatoms,
wherein R
1
is not a hydrogen atom for at least one monomeric unit,
wherein W for each monomeric unit is selected from an optionally substituted, branched or straight chain divalent moiety having from 1 to about 50 atoms in a backbone that contains carbon, and optionally contains nitrogen, oxygen, sulfur, and phosphorus, and optionally one or more double or triple bonds, wherein said optional substitution of W may be a reactive moiety that is capable of further reaction with said lipid reactant,
wherein at least one of T
a
, T
c
, W for a single monomeric unit, or R
1
for a single monomeric unit comprises a reactive moiety that is capable of further reaction with said lipid reactant; then
b) reacting said lipid reactant with said oligomer reactant to conjugate the lipid reactant to the oligomer reactant.
In another embodiment, the present invention provides a composition comprising a lipid-conjugated polyamide compound of the present invention and a biologically active agent.
In yet another embodiment, the present invention provides a method for inducing the uptake of a biologically active agent by a cell, said method comprising:
providing a composition comprising an e
Huang Chin-Yi
Murphy John E.
Uno Tetsuo
Zuckermann Ronald N.
Blackburn Robert P.
Chiron Corporation
Collier Steven W.
Gorthey LeeAnn
Kishore Gollamudi S.
LandOfFree
Lipid-conjugated polyamide compounds and related... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Lipid-conjugated polyamide compounds and related..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lipid-conjugated polyamide compounds and related... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3011091