EP0179879A1 - Substance de remplacement du sang humain et son procede de production - Google Patents

Substance de remplacement du sang humain et son procede de production

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Publication number
EP0179879A1
EP0179879A1 EP85902361A EP85902361A EP0179879A1 EP 0179879 A1 EP0179879 A1 EP 0179879A1 EP 85902361 A EP85902361 A EP 85902361A EP 85902361 A EP85902361 A EP 85902361A EP 0179879 A1 EP0179879 A1 EP 0179879A1
Authority
EP
European Patent Office
Prior art keywords
composition
hemoglobin
phase
coacervate
composition according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP85902361A
Other languages
German (de)
English (en)
Inventor
Bernard Ecanow
Charles S. Ecanow
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Synthetic Blood Corp
Original Assignee
Synthetic Blood Corp
Neomed Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Synthetic Blood Corp, Neomed Inc filed Critical Synthetic Blood Corp
Publication of EP0179879A1 publication Critical patent/EP0179879A1/fr
Ceased legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K9/00—Medicinal preparations characterised by special physical form
    • A61K9/0012—Galenical forms characterised by the site of application
    • A61K9/0019—Injectable compositions; Intramuscular, intravenous, arterial, subcutaneous administration; Compositions to be administered through the skin in an invasive manner
    • A61K9/0026—Blood substitute; Oxygen transporting formulations; Plasma extender
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K38/00—Medicinal preparations containing peptides
    • A61K38/16—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
    • A61K38/17—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
    • A61K38/38—Albumins
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K38/00—Medicinal preparations containing peptides
    • A61K38/16—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
    • A61K38/17—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
    • A61K38/39—Connective tissue peptides, e.g. collagen, elastin, laminin, fibronectin, vitronectin, cold insoluble globulin [CIG]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y5/00—Nanobiotechnology or nanomedicine, e.g. protein engineering or drug delivery

Definitions

  • the invention concerns an improved composition useful as a substitute for human blood and as an oxygen transport system, and methods of preparation.
  • the herein disclosed invention represents a significant scientific advance in that through its use of a coacervate system the problems associated with liposome preparations and pyridoxalated-polymerized hemoglobin solutions are avoided.
  • the manufacturing sequence of this invention is designed: (1) to yield a coacervate system which can serve as an oxygen transport solution; (2) to produce, when specific additives, including many of the forms of hemoglobin, i.e. stroma free hemoglobin, lipsome en ⁇ capsulated hemoglobin, pyridoxilated-polymerized hemo ⁇ globin etc. are incorporated in the coacervate system, a composition suitable as a substitute for human blood is produced; and (3) to provide, if desired, a form of microencapsulated hemoglobin with an approximate equival ⁇ ence to the cytoplasm of erthrocytes or packed red cells.
  • the oxygen carrying solution herein described can also restore and maintain normal oncotic pressure when in- fused into the circulatory system.
  • the ap ⁇ plicants draw a distinction between synthetic blood products disclosed in U.S. Patent Nos. 4,343,797 and 4,439,424, and oxygen transport solutions. For the most part the oxygen release curve of the latter differs significantly from that of synthetic whole blood.
  • the invention provides a com ⁇ position of matter which is useful as an oxygen trans ⁇ port system or, when appropriate additives are incor ⁇ porated, as a blood substitute; said preparation char- acterized by a non-toxic two phase liquid system, both said phases being aqueous; a) one of said phases being a relatively non- polar coacervate phase having physio ⁇ logical and physicochemical properties substantially equivalent to cytoplasm, as present in red blood cells; b) the other of said phases being a relatively polar liquid aqueous phase having physio ⁇ logical and physicochemical properties substantially equivalent to blood plasma; c) said relatively non-polar coacervate phase being insoluble in and in equilibrium with said relatively polar liquid aqueous phase, d) said two phase liquid system having physiological and physicochemical prop ⁇ erties which enable it to serve as an ef ⁇ fective oxygen transport system, e) .
  • the invention provides a method of preparing a composition of matter which is useful as a blood substitute, said method characterized by the steps of (a) combining albumin and.aphospholipid in water; (b) thoroughly mixing the components; (c) storing said mixture undisturbed until the composition of step (a) separates into two layers, one above the other, the lower layer being a substantially non-polar coacervate phase, and the upper layer being an equilibrium water phase; (d) continuing the separation process until no increases in the volume of the coacervate phase can be observed; (e) centrifuging the composition until in ⁇ spection reveals a clear demarcation of the two phases; and (f) separating the two phases.
  • compositions of mat- ter and methods by means of which they can be prepared comprise compositions of mat- ter and methods by means of which they can be prepared.
  • the claimed inventions comprise a combination of en ⁇ dogenous components and water which yields a two phase heterogeneous physico-chemical coacervate system similar to that of human blood. This coacervate system is the basis of the herein disclosed discovery.
  • any appropriate non toxic co ⁇ acervate system can be used to manufacture the products of this invention, and further, any endogenous bio ⁇ logical surface active agent or derivative thereof, such as albumin, lecithin, gelatin etc. , can be used to prepare a coacervate system appropriate for the method and product of this invention.
  • Appropriate non- toxic exogenous components i.e. acacia gel, can also be used.to prepare suitable coacervate systems. . he method of making this invention begins with the preparation of a two phase aqueous liquid system, also referred to as " a coacervate system.
  • the prep ⁇ aration of the coacervate system When the prep ⁇ aration of the coacervate system is completed, it will consist of two phases: (1) an internal suspension, relatively non polar phase, commonly referred to as the coacervate phase; and (2) an associated, relatively polar external suspension or equilibrium phase. Both phases are in equilibrium with and insoluble in each other.
  • the coacervate phase of this two phase system can comprise from about 0.5% to 99.5% by volume of the system; correspondingly, the associated equilibrium phase can comprise from about 0.5% to 99.5% by volume of the system.
  • the preferred proportions are 50% volume to volume of each of these components.
  • the coacervate phase of the claimed coacervate system possesses physiological properties equivalent to the cytoplasm of erythrocytes or packed red cells. As such, this phase of the coacervate system has sig ⁇ nificant oxygen transport capability.
  • the equilibrium phase possesses physiological and physiochemical prop ⁇ erties equivalent to the plasma of human blood.
  • the claimed two phase aqueous liquid system functions as an oxygen transport, solution and may be drawn off during the process of manufacture.
  • components such as ap ⁇ limbate proteins, electrolytes, sterols, any of sev ⁇ eral available forms of hemoglobin and an oxygen re ⁇ leasing entity are added to the coacervate system, the system achieves a functional physiological equivalence approaching that of human blood.
  • the disclosed coacer ⁇ vate systemand additives are subjected to warming and/or •other procedures. In such process the end product is microencapsulated hemoglobin.
  • Enzymes, nutrients and drugs are among the ad ⁇ ditives that may be incorporated in the preparation of the blood substitute.
  • Virtually any of the known forms of hemoglobin which are free of stromal toxicities may be used: i.e., stroma free hemoglobin, liposomes con ⁇ taining stroma free hemoglobin, polymerized hemoglobin, pyridoxalated-polymerized hemoglobin, microencapsulated ⁇ stroma free hemoglobin, etc.
  • Human and other forms of mammalian blood, i.e. bovine blood, etc. comprise the sources of the hemoglobin component. The human source is preferred.
  • modified hemoglobin i.e., the pyridoxala- ted-polymerized form
  • the problems presently as- sociated with such forms of hemoglobin, i.e. oxygen re- lease, at normal oxygen tensions and loss of hemoglobin solution from the vascular system are eliminated.
  • an oxygen releasing molecule such as di-phospho-glycerate to the coacervate system in the course of the manufacturing process.
  • di-phospho-gly ⁇ cerate acts to release oxygen from hemoglobin precisely as it does in the body.
  • Small quantities of urea may also be added, if desired, during the preparation of this composition to further the release of .oxygen from the said composition.
  • Loss of the oxygen transport solution from the vascular space is prevented in this invention by two factors: (1) by emulsifying the preparation wherein the resulting emulsified droplets in which the hemo ⁇ globin is contained are manufactured to a size of ap ⁇ proximately 7 microns, i.e., the size of normally oc ⁇ curring erythrocytes. Emulsified droplets of this size permit oxygenation of tissues, prevent escape of the solution from the circulation and allow entry of the hemoglobin bearing droplets into the microcirculation.
  • the method of preparation provides for the droplet size, if desired, to vary from 100 millimicrons to 15 microns.
  • the composition may by comprised of emulsified droplets of the same size or of any combination of sizes, depending upon the in ⁇ tended use.
  • a preponderance of emulsified droplets of a size smaller than 0.6 microns may be indicated; example: when it is desired that the claimed composition penetrate in- farcted area(s) in the vascular system.
  • the disclosed invention indicates that equal proportions of albumin and lecithin are preferred in the preparation of the claimed composition, it is possible to produce coacervate systems using unequal proportions of albumin and lecithin. In the case of such usage, however, the resulting coacervate system may not have the optimal yield of the coacervate phase. However, the coacervate phase of such systems may pos ⁇ sess other desireable characteristics known to those skilled in the art, e.g., oxygen transport.
  • the claimed invention also contains a pro ⁇ cess in the manufacturing procedure which yields de- rivative compositions.
  • One of these is the physio ⁇ logical equivalent of the cytoplasm of erythrocytes. When hemoglobin is added to this preparation, the equivalent of packed red .cells is produced.
  • the deriva ⁇ tive preparations can be subjected to microencapsula- tion procedures and to a heating step. The heating step will act to harden the surface of the coacervate phase droplets of the composition to any desired degree. This results in compositions with sustained release characteristics. If desired, achemical process using non-toxic members of the aldehyde group may be used. The heating procedure is preferred.
  • the scientific literature con ⁇ tains no reference to a two phase heterogeneous physico- chemical system which permits the effective incorpora- tion of modified forms of hemoglobin and further, which can serve as a useful substitute for human blood.
  • a composi ⁇ tion which possesses physico-chemical properties that approximate those of the cytoplasm of erythrocytes or of packed red cells.
  • the component ingredients are prepared and combined un ⁇ der sterile conditions. All water used in the manu ⁇ facturing process must be sterile and pyrogen free.
  • the preparation of the appropriate coacervate system constitutes the first s.tep of the method neces ⁇ sary to produce the product of this invention.
  • the preferred ingredients of this step are albumin and a suitable phospholipid. In this method lecithin is pre- ferred. However, other phospholipids known to those skilled in the art such as cephalin, isolecithin, sphingomyolin, phosphatidyl serine, phosphatidic acid, phosphatidyl inosital, phosphatidyl choline may also be used.
  • albumin and lecithin are added to an amount of sterile water that will yield 100 mis. of aqueous solution. The mixture is then thoroughly mixed by vortex mixer.
  • the preferred proportions for each component, i.e. albumin and lecithin, are 3% weight to volume. Unequal proportions of albumin and lecithin can yield a coacervate system. However, this method is not preferred.
  • any quantity of albumin and lecithin can be used, provided the requirement of the proportions of the ingredients is observed and quantity of water used is adjusted ac ⁇ cordingly.
  • the solution is stored in suitable containers.
  • the solution is stored undisturbed until the maximum yield of the coacervate phase of the coacervate system has been achieved. Maximum yield is the point at which no significant increase in the volume of the coacer- vate phase can be observed. This determination can be made by direct visual.inspection or other suitable means. As is known to those skilled in the art, longer periods of storage produce greater yields of the coacer ⁇ vate phase.
  • the storage step may take place at tempera ⁇ tures ranging from freezing point to about 4 degrees C. and up to room temperature or higher. In the preferred method, storage takes place at a temperature of from about 4 degrees to 10 degrees C. .
  • the coacervate system When it is .observed that the maximum yield of the coacervate phase has been achieved, the coacervate system is centrifuged until observation indicates that a clear division exists at the interface of the two phases of the coacervate system. If an oxygen trans- port solution is desired, the system is emulsified, the particle size of which may range from 100 milli ⁇ microns to 10 microns. The composition is placed in re ⁇ frigerated storage until needed. If the manufacturing objective is to produce a synthetic blood, the fol- lowing steps are initiated.
  • the two phases are then separated-by means of a separatory funnel.
  • the equilibrium phase is set aside for subsequent recombination with the coacervate phase.
  • Any of the previously preferred to forms of hemo- globin is then mixed into the coacervate phase in an amount that will produce life sustaining oxygen ten ⁇ sions in the finished product.
  • any suitable form of hemoglobin known to those skilled in the art may be used: i.e. stroma free hemoglobin, liposomes contain- ing stroma free hemoglobin, polymerized hemoglobin, pyridoxalated-polymerized hemoglobin, stroma free micro ⁇ encapsulated hemoglobin or mixtures thereof.
  • pyridoxalated-polymerized hemoglobin is pre ⁇ ferred. It is noted that the source of the hemoglobin component may be human or bovine.
  • any oxygen liberating en ⁇ tity such as di-phospho-glycerate is added, and mixed into the coacervate phase.
  • the amount added may range from 1% or less to 6% or more weight to volume. In this disclosure 4% weight to volume of di-phospho- glycerate is preferred.
  • the next step consists of recombining the equilibrium phase with the coacervate phase which now includes the additives described above.
  • This is fol- lowed by a step in which the preparation is emulsified and an electrolyte is added.
  • Any of the electrolytes known to those skilled in the art i.e. sodium chloride, potassium chloride, magnesium chloride, or calcium chloride may be used.
  • the purpose of this addition is to render the composition isotonic with human blood.
  • Sodium chloride is the preferred electrolyte and is added in that quantity that will produce the desired isotonicity. At this point, if desired, 1 mg per cent of urea my be added. This component can act to facili- tate the release of oxygen from the hemoglobin present in the claimed composition.
  • a sterol from the following group is added: chlosterol, ergosterol, 7-dehydrocholesterpl, 0 ⁇ sitosterol, p sitosterol, ⁇ sitosterol, campesterol or mixtures thereof.
  • Choles- terol is preferred. 0.1 to 10 mg. per cent of choles ⁇ terol may be added to the preparation to improve the stability of the composition. The preferred amount of cholesterol added to the composition s 1 mg. per cent.
  • the pH of the preparation is adjusted to 7.4 to 7.5 by the drop by drop addition of either HCl or sodium bicarbonate, depending upon the pH of the preparation.
  • Any other suitable non toxic acidifying or alkalizing agent may be used in place of hydrochloric acid or sodium bicarbonate, however, the agents named are preferred.
  • the compo- sition is again emulsified using either a colloid mill, sonification or other emulsifying technique known to those skilled in the art.
  • This step produces emul ⁇ sified droplets which contain the hemoglobin component.
  • the droplets can range in size from less than 100 milli- microns to 15 microns and above; the preferred size is that of normal erythrocytes.
  • the invention pro ⁇ vides for the possibility that specific medical treat ⁇ ments may require that the size of the droplets be of smaller dimensions.
  • enzymes, nutrients and drugs may be added to the coacervate phase of the com ⁇ position or to the composition at this stage of manu ⁇ facture.
  • the first step of that process consists of warming the preparation described immediately above. This step is accomplished by warming the preparation in a water bath or controlled oven to a temperature ranging from 15 to 50 C for from 20 seconds to 3 hours in order to produce a cross linking of the albumin and lecithin of the composition.
  • the effect of this process is a hardening of the surface of the emul ⁇ sified droplets. The degree of hardness obtained is a function of the duration and temperature of the warming step.
  • compositions for relatively shorter periods of time to higher temperatures will yield approximately the same degree of hardening of the emulsified droplet surfaces as subjecting the compo ⁇ sition to' lower temperatures for relatively longer periods of time.
  • a spectrum of de- grees of surface hardness is possible at this point of manufacture by varying the variables of time and tem ⁇ perature.
  • the degree of structuring or hardening of the surface of the emulsified droplets can range from fluid-like to semi-solid, i.e. gel ⁇ like to rigid.
  • the droplets are filtered from the emulsion.
  • the fil ⁇ trate is discarded.
  • the droplets are removed from the filter bed, washed thoroughly with normal saline or other suitable solution and then dried by any of the con ⁇ ventional methods.
  • differing proportions of the dried preparation with differing degrees of shell hardness may be combined, during the process of re ⁇ constituting the preparation with normal saline or other suitable solutions.
  • droplets of the same degree of surface hardness may be used in the process of reconstitution.
  • the composition will possess special oxygen release proper ⁇ ties, and will be capable of prompt, sustained and/or prolonged effects.
  • Cross linking may also be achieved through chemical means known to those skilled in the art, i.e., through the use of gluteraldehyde, etc.
  • the method of heating is preferred in this invention. If it is de ⁇ sired to produce a product that has physiological prop ⁇ erties similar to the cytoplasm of erythrocytes, the pro ⁇ cedure described above is followed except that the hemo- globin component is omitted.
  • the products i.e., the oxygen transport solution, the blood substitute, or either of the derivative compo ⁇ sitions
  • the products can be transfused into the circulatory system, where the individually described functions will be carried ' out: transport of physiological gases, restora ⁇ tion of blood pressure, transport of drugs and enzyme systems etc.
  • each composition can be stored, preferably at from 4 to 10 degrees C until need ⁇ ed. * If the composition is to be infused into a human or animal following refrigerated storage, it should be warmed to body temperature (37 degrees C) before in ⁇ fusion.
  • the solution is stored undisturbed until the maximum yield of the co ⁇ acervate phase of the coacervate system has been achieved.
  • the storage.step takes place at 4 degrees C.
  • the coacervate system is centrifuged until observation indicates that a clear division exists at the interface of the two phases of the coacervate system.
  • the two phases are then separated by means of a separatory funnel.
  • the equilibrium phase is set aside for subsequent recombina ⁇ tion with the coacervate phase.
  • 15 grams of pyridoxa ⁇ lated-polymerized hemoglobin are then dispersed into the coacervate phase. After this step, 4% weight to volume di-phospho-glycerate is added and mixed into the co- acervate phase.
  • the next step consists of reco bining the equilibrium phase and the coacervate which contains the above named components and emulsifying the preparation, and adding that quantity of sodium chloride as will render the composition isotonic with human blood. At this point, 1 mg. per cent of urea is added. 1 mg. of cholesterol is added as the following step. The compo ⁇ sition is then mixed vigorously until all additives are dispersed.
  • the pH of the preparation is adjusted to 7.4 to 7.5.by the drop by drop addition of either HCl or sodium bicarbonate, depending upon the pH of the preparation at this stage of manufacture.
  • the composition is again emulsified using a colloid mill.
  • the resulting emulsified droplets which contain the hemoglobin compon ⁇ ent are prepared to be 7 microns in size.
  • Example 6 The procedure of Example 1 is • followed ex ⁇ cept that 15 grams of stroma free hemoglobin are added in ⁇ stead of the pyridoxalated-polymerized hemoglobin. EXAMPLE 6
  • Example 1 The procedure of Example 1 is followed ex ⁇ cept that liposomes containing a total of 15 grams of stroma free hemoglobin are used in place of pyridoxa- lated-polymerized hemoglobin.
  • EXAMPLE 7 200 mis. of a 5% solution of albumin is added to 200 mis. of a 7% solution of lecithin and mixed thoroughly. The remaining steps of the procedure fol- low Example 1.
  • EXAMPLE 8 200 mis. of a 3% solution of albumin is thoroughly mixed with 200 mis of a 3% solution of iso- lecithin. The solution is then stored undisturbed at . 4 degrees C for 24 hours. The remaining steps of the procedure follow Example 1.
  • Example 10 The procedure of Example 1 is followed to completion.
  • the resulting composition is then sub ⁇ jected to a warming step. This consists of placing the solution in a water bath at 25 degrees C for five min ⁇ utes. At the end of this period the droplets of the composition are filtered from the emulsion, and washed thoroughly with normal saline solution and dried by conventional means. 100 mis of normal saline solution are added to the product resulting from this process thereby reconstituting a composition, the physio ⁇ logical properties of which are equivalent to the cyto ⁇ plasm of packed red -cells.
  • Example 11 The procedure of Example 10 is followed! ex ⁇ cept that the warming stage is carried out at 30 degrees C - ⁇ - for 1 minute.
  • Example 12 The procedure of Example 1 is followed ex ⁇ cept that 2% weight to volume of di-phospho-glycerate is used.
  • EXAMPLE 13 The procedure of Example 1 is followed ex ⁇ cept that 1 mg. per cent of ergosterol is used in place of cholesterol. EXAMPLE 14
  • Example 1 The procedure of Example 1 is followed ex ⁇ cept that the emulsified droplets in the finished pro ⁇ duct are prepared to be 100 millimicrons in size.
  • EXAMPLE 15 The procedure follows Example 1 except that after the emulsification step, essential amino acids such as L-lysine, L-tryptophan, L-histidine, L-phenyl- alanine, L-leucine, L-isoleucine, L-threonine, L-valine, L-orgine, and L-methionine can be added in the amounts and mixtures as indicated by the needs of the individual situation.
  • essential amino acids such as L-lysine, L-tryptophan, L-histidine, L-phenyl- alanine, L-leucine, L-isoleucine, L-threonine, L-valine, L-orgine, and L-methionine can be added in the amounts and mixtures as indicated by the needs of the individual situation.
  • EXAMPLE 16 The procedure follows Example 1 except that hemoglobin and di-phospho-glycerate components are omitted from the manufacturing process. This example produces a composition which approximates the physio ⁇ logical properties of the cytoplasm of erythrocytes.

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  • Health & Medical Sciences (AREA)
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  • Engineering & Computer Science (AREA)
  • Pharmacology & Pharmacy (AREA)
  • General Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Bioinformatics & Cheminformatics (AREA)
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  • Animal Behavior & Ethology (AREA)
  • Epidemiology (AREA)
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  • Gastroenterology & Hepatology (AREA)
  • Nanotechnology (AREA)
  • Proteomics, Peptides & Aminoacids (AREA)
  • Immunology (AREA)
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  • Hematology (AREA)
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  • Biotechnology (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Molecular Biology (AREA)
  • Dermatology (AREA)
  • Medical Informatics (AREA)
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  • Medicinal Preparation (AREA)
  • Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
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Abstract

Le procédé ci-décrit permet d'obtenir un système aqueux liquide à deux phases qui reproduit le système physico-chimique hétérogène à deux phases du sang total humain naturel. Le procédé permet de produire 1) une composition comprenant une solution de transport d'oxygène; 2) lorsqu'on y incorpore de l'hémoglobine pyridoxalatée-polymérisée et d'autres additifs spécifiques, cette composition comprend du sang synthétique pouvant être utilisé comme succédané du sang humain; 3) en traitant ultérieurement ce succédané du sang humain, on obtient une composition en microcapsules présentant des caractéristiques de libération dans le temps et qui peut véhiculer de l'oxygène. Cette invention résout les problèmes posés par l'utilisation d'hémoglobine pyridoxalatée-polymérisée et d'autres formes d'hémoglobine modifiée dans la préparation de solutions de transport d'oxygène.
EP85902361A 1984-04-27 1985-04-24 Substance de remplacement du sang humain et son procede de production Ceased EP0179879A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US60447684A 1984-04-27 1984-04-27
US604476 1984-04-27

Publications (1)

Publication Number Publication Date
EP0179879A1 true EP0179879A1 (fr) 1986-05-07

Family

ID=24419756

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85902361A Ceased EP0179879A1 (fr) 1984-04-27 1985-04-24 Substance de remplacement du sang humain et son procede de production

Country Status (5)

Country Link
EP (1) EP0179879A1 (fr)
JP (1) JPS61501989A (fr)
AU (1) AU583272B2 (fr)
NO (1) NO855255L (fr)
WO (1) WO1985005035A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4874742A (en) * 1981-01-05 1989-10-17 Synthetic Blood Corporation Synthetic whole blood and a process for preparing the same
US4963367A (en) * 1984-04-27 1990-10-16 Medaphore, Inc. Drug delivery compositions and methods
EP0256856A3 (fr) * 1986-08-14 1989-01-11 Synthetic Blood Corporation Composition pour l'administration parentérale
ES2032802T5 (es) * 1986-11-10 2004-01-16 Biopure Corporation Sucedaneo de sangre semisintetico extrapuro.
IL88095A0 (en) * 1987-10-23 1989-06-30 California Inst Of Techn Dna sequences,proteins and gene preparations
US6172039B1 (en) 1990-04-16 2001-01-09 Apex Bioscience, Inc. Expression of recombinant hemoglobin and hemoglobin variants in yeast
KR100267604B1 (ko) * 1993-06-04 2000-11-01 이 세갈 폴 혈장 유사 용액

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4343797A (en) * 1981-01-05 1982-08-10 Ecanow Charles S Synthetic whole blood and a method of making the same
WO1983002228A1 (fr) * 1981-12-31 1983-07-07 Neomed Inc Sang entier synthetique et son procede de production
US4539204A (en) * 1982-10-29 1985-09-03 Neomed Inc. Gelatin based synthetic blood and a method of making the same

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8505035A1 *

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Publication number Publication date
AU4294185A (en) 1985-11-28
NO855255L (no) 1985-12-23
WO1985005035A1 (fr) 1985-11-21
AU583272B2 (en) 1989-04-27
JPS61501989A (ja) 1986-09-11

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