US5362478A
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Magnetic resonance imaging with fluorocarbons encapsulated in a cross-linked polymeric shell
Assignee: Abraxis Bioscience LLC
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Filing: 1993-03-26
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Granted: 1994-11-08
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Expires: 2013-03-26
Abstract
Abstract In accordance with the present invention, compositions comprising fluorine-containing magnetic resonance imaging agent(s) contained within polymeric shells are provided. Invention compositions are useful, for example, as contrast agents for magnetic resonance imaging (MRI). Fluorinated compounds in general are hydrophobic and as such have limited water solubility; thus the invention method permits preparation of such compounds in a biocompatible form suitable for ready delivery. The shell diameter is typically approximately 2 microns in diameter. Consequently, these materials have organ specificity due to rapid scavenging by the reticuloendothial system (RES) or the mononuclear phagocyte (MNP) system upon intravenous injection. Furthermore, fluorocarbon filled polymeric shells of the invention can be used to measure and monitor local oxygen and temperature.
Inventors
- 👤 Neil P. Desai
- 👤 Patrick Soon-Shiong
- 👤 Paul A. Sandford
- 👤 Mark W. Grinstaff
- 👤 Kenneth S. Suslick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:50
CPC Classifications
A; A61; A61K; A61K49/00; A61K49/22; A61K49/222; A61K49/223; A61K47/00; A61K47/50; A61K47/69; A61K47/6921; A61K47/6925; A61K49/06; A61K49/08; A61K49/10; A61K49/12; A61K49/126; A61K49/18; A61K49/1806; A61K49/1818; A61K49/1821; A61K49/1824; A61K49/1827; A61K49/1851; A61K49/1857; A61K49/186; A61K49/1863; A61K49/1866; A61K49/1869; Y; Y10; Y10S; Y10S436/00; Y10S436/806; Y10T; Y10T436/00; Y10T436/24
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
62 words
A composition for obtaining in vivo fluorine magnetic resonance images, said composition comprising fluorine-containing magnetic resonance imaging agent(s) substantially completely contained within a polymeric shell; wherein said polymeric shell comprises a biocompatible naturally occurring polymer which is substantially crosslinked by way of disulfide bonds, wherein said biocompatible naturally occurring polymer, prior to crosslinking, has covalently attached thereto sulfhydryl groups or disulfide groups.
Claim 2
Dependent Claim
62 words
A composition for obtaining in vivo fluorine magnetic resonance images, said composition comprising fluorine-containing magnetic resonance imaging agent(s) substantially completely contained within a polymeric shell; wherein said polymeric shell comprises a biocompatible naturally occurring polymer which is substantially crosslinked by way of disulfide bonds, wherein said biocompatible naturally occurring polymer, prior to crosslinking, has covalently attached thereto sulfhydryl groups or disulfide groups.
Claim 3
Dependent Claim
213 words
A composition according to claim 1 wherein said fluorine-containing magnetic resonance imaging agent is selected from: (a) C x F 2x+y-z A z , wherein: x=1-30, y=2; or 0 or -2, when x≧2; or -4 when x≧4, z=any whole number from 0 up to (2x+y-1), and A is selected from H, halogens other than F, --CN, --OR, wherein R is H, alkyl, fluoroalkyl, alkenyl, fluoroalkenyl, alkynyl, fluoroalkynyl, aryl, fluoroaryl, alkanoyl, fluoroalkanoyl, alkenoyl, fluoroalkenoyl, alkynoyl, fluoroalkynoyl, (b) [C x F 2x+y'-z A z ] a JR b-a , wherein: x, z, A and R are as defined above, y'=+1; or -1 or -3, when x≧2; or -5 when x≧4, J=O, S, N, P, Al or Si, a=1, 2, 3, or 4, and b=2 for a divalent J, or 3 for a trivalent J, or 4 for a tetravalent J, (c) A'--[(CF 2 ) x --O] c --A", wherein: x is as defined above, A' is selected from H, halogens, --CN, --OR, wherein R is H, alkyl, fluoroalkyl, alkenyl, fluoroalkenyl, alkynyl, fluoroalkynyl, aryl, fluoroaryl, alkanoyl, fluoroalkanoyl, alkenoyl, fluoroalkenoyl, alkynoyl, fluoroalkynoyl, A" is selected from H or R, wherein R is as defined above, c=1-300, or (d) ##STR2## wherein: x is as defined above, and c'=2-20, as well as mixtures of any two or more thereof.
Claim 4
Dependent Claim
39 words
A composition according to claim 1 wherein said composition is capable of undergoing a change in relaxation rate due to changes in the local oxygen concentration, and is therefore useful for the in vivo determination of local oxygen concentrations.
Claim 5
Dependent Claim
42 words
A composition according to claim 1 wherein said composition is capable of undergoing a solid to liquid phase transition in the temperature range of about 22 up to 55° C., and is therefore useful for the in vivo determination of local temperature.
Claim 6
Dependent Claim
45 words
A composition according to claim 1 wherein said biocompatible naturally occurring polymer is selected from proteins containing sulfhydryl groups and/or disulfide groups, polypeptides containing sulfhydryl groups and/or disulfide groups, polynucleic acids containing sulfhydryl groups and/or disulfide groups, or polysaccharides containing sulfhydryl groups and/or disulfide groups.
Claim 7
Dependent Claim
19 words
A composition according to claim 1 wherein the disulfide bonds on the crosslinked polymer are formed by ultrasonic irradiation.
Claim 8
Dependent Claim
14 words
A composition according to claim 1 wherein said biocompatible naturally occurring polymer is albumin.
Claim 9
Dependent Claim
20 words
A composition according to claim 1 wherein said polymeric shell containing agent therein is suspended in a biocompatible aqueous liquid.
Claim 10
Dependent Claim
42 words
A composition according to claim 8 wherein said biocompatible aqueous liquid is selected from water, buffered aqueous media, saline, buffered saline, solutions of amino acids, solutions of sugars, solutions of vitamins, solutions of carbohydrates, or combinations of any two or more thereof.
Claim 11
Dependent Claim
15 words
A composition according to claim 1 wherein said agent is contained within said shell neat.
Claim 12
Dependent Claim
21 words
A composition according to claim 1 wherein said agent within said shell is dissolved or suspended in a biocompatible dispersing agent.
Claim 13
Dependent Claim
95 words
A composition according to claim 11 wherein said biocompatible dispersing agent is selected from soybean oil, mineral oil, corn oil, rapeseed oil, coconut oil, olive oil, safflower oil, cotton seed oil, aliphatic, cycloaliphatic or aromatic hydrocarbons having 4-30 carbon atoms, aliphatic or aromatic alcohols having 2-30 carbon atoms, aliphatic or aromatic esters having 2-30 carbon atoms, alkyl, aryl, or cyclic ethers having 2-30 carbon atoms, alkyl or aryl halides having 1-30 carbon atoms, optionally having more than one halogen substituent, ketones having 3-30 carbon atoms, polyalkylene glycol, or combinations of any two or more thereof.
Claim 14
Dependent Claim
76 words
A composition for in vivo delivery of fluorine-containing magnetic resonance imaging agent, wherein said agent is a solid or liquid, and is substantially completely contained within a polymeric shell, wherein the largest cross-sectional dimension of said shell is no greater than about 10 microns, wherein said polymeric shell comprises a biocompatible polymer which is substantially crosslinked by way of disulfide bonds, and wherein said polymeric shell containing agent therein is suspended in a biocompatible aqueous liquid.
Claim 15
Dependent Claim
76 words
A composition for in vivo delivery of fluorine-containing magnetic resonance imaging agent, wherein said agent is a solid or liquid, and is substantially completely contained within a polymeric shell, wherein the largest cross-sectional dimension of said shell is no greater than about 10 microns, wherein said polymeric shell comprises a biocompatible polymer which is substantially crosslinked by way of disulfide bonds, and wherein said polymeric shell containing agent therein is suspended in a biocompatible aqueous liquid.
Claim 16
Dependent Claim
21 words
A method to obtain in vivo magnetic resonance images by administering to a subject a composition as described in claim 1.
Claim 17
Dependent Claim
30 words
A method for the delivery of fluorine-containing magnetic resonance imaging agents to a subject, said method comprising administering to said subject an effective amount of composition according to claim 1.
Claim 18
Dependent Claim
61 words
A composition for obtaining in vivo fluorine magnetic resonance images, said composition comprising fluorine-containing magnetic resonance imaging agent(s) substantially completely contained within a polymeric shell; wherein said polymeric shell comprises lipid(s) containing sulfhydryl groups and/or disulfide groups which is substantially crosslinked by way of disulfide bonds, wherein said lipid, prior to crosslinking, has covalently attached thereto sulfhydryl groups or disulfide groups.
Claim 19
Dependent Claim
61 words
A composition for obtaining in vivo fluorine magnetic resonance images, said composition comprising fluorine-containing magnetic resonance imaging agent(s) substantially completely contained within a polymeric shell; wherein said polymeric shell comprises lipid(s) containing sulfhydryl groups and/or disulfide groups which is substantially crosslinked by way of disulfide bonds, wherein said lipid, prior to crosslinking, has covalently attached thereto sulfhydryl groups or disulfide groups.
References Cited (Backward Citations)
US4639364A
Cited
EP0307863A1
Cited
WO1989003693A1
Cited
US5171755A
Cited
WO1990001953A1
Cited
US4951673A
Cited
US5114703A
Cited
WO1991001759A1
Cited
US5116599A
Cited
WO1991015753A1
Cited
US5143716A
Cited
WO1992018165A2
Cited
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