Abstract:
An improved blood substitute composition comprising a blood substitute and a renin-angiotensin-aldosterone An improved blood substitute composition comprising a blood substitute and a renin-angiotensin-aldosterone system inhibitor. A method of treating a patient having a disorder requiring a blood transfusion comprising administering a free hemoglobin based blood substitute and a renin-angiotensin-aldosterone system inhibitor. A renin-angiotensin-aldosterone system activator comprising hemoglobin or hemoglobin and a peroxide. A method of increasing the activity of angiotensin converting enzyme comprising incubation with hemoglobin or hemoglobin and peroxide. A method according of activating the renin-angiotensin-aldosterone system comprising contacting in vivo a free hemoglobin based blood substitute with a peroxide wherein the product induces the production of angiotensin I metabolites which comprise metabolites capable of affecting the vascular tone and/or stimulating aldosterone production.
Abstract:
An improved blood substitute composition comprising a blood substitute and a renin-angiotensin-aldosterone system inhibitor. A method of treating a patient having a disorder requiring a blood transfusion comprising administering a free hemoglobin based blood substitute and a renin-angiotensin-aldosterone system inhibitor. A renin-angiotensin-aldosterone system activator comprising hemoglobin or hemoglobin and a peroxide. A method of increasing the activity of angiotensin converting enzyme comprising incubation with hemoglobin or hemoglobin and peroxide. A method according of activating the renin-angiotensin-aldosterone system comprising contacting in vivo a free hemoglobin based blood substitute with a peroxide wherein the product induces the production of angiotensin I metabolites which comprise metabolites capable of affecting the vascular tone and/or stimulating aldosterone production.
Abstract:
The present invention relates to novel methods of using blood substitutes to treat acute blood loss and novel pharmaceutical compositions comprising blood substitutes. Blood substitutes useful for the methods of the present invention can (1) induce expression of erythropoietin as tested in a cell culture under normoxic conditions, and/or (2) induce erythropoiesis under normoxic conditions as measured by (a) a decrease in the doubling time of the subject's hematocrit or hemoglobin, and/or (b) an increase in the subject's circulating erythropoietin level. Blood substitutes useful for the pharmaceutical compositions of the present invention can (1) stabilize HIF-I alpha expression, and/or (2) down regulate NF-kappa B. Preferably, the blood substitutes are cross-linked hemoglobin blood substitutes, or more preferably, cross-linked hemoglobins that comprise a hemoglobin that is cross-linked intramolecularly with periodate-oxidized ATP5 cross-linked intermolecularly with periodate-oxidized adenosine, and conugated with reduced glutathione.
Abstract:
A method comprising contacting a biological fluid comprising hemoglobin and at least one pathogenic agent with a first filter and generating a first filtrate; contacting the first filtrate with a nanofiltration device and generating a second filtrate; contacting the second filtrate with a chromatographic material and isolating an eluted fraction; contacting the eluted fraction with a hydrophobic solvent and generating a hydrophobic and a hydrophilic phase; and isolating the hydrophilic phase wherein the biological fluids comprise components of interest of equal to or less than about 65 kDa. A method comprising contacting a biological fluid comprising high molecular weight components and at least one pathogenic agent with a first filter and generating a first filtrate; contacting the first filtrate with a hydrophilic membrane and generating a second filtrate; contacting the second filtrate with a chromatographic material and isolating an eluted fraction; contacting the eluted fraction with a hydrophobic solvent and generating a hydrophobic and a hydrophilic phase; and isolating the hydrophilic phase, wherein the high molecular weight components have molecular weights greater than about 65 kDa. A method comprising subjecting a biological fluid comprising hemoglobin and at least one pathogenic agent to at least two filtration steps and thereby reducing the amount of pathogenic agent associated with the biological fluid. A method comprising removing transmissible spongiform encephalopathy agents in a hemoglobin solution of human and/or animal origin by subjecting the hemoglobin solution to an orthogonal separation methodology comprising a plurality of filtration steps.
Abstract:
The present invention relates to novel methods of using blood substitutes to treat acute blood loss and novel pharmaceutical compositions comprising blood substitutes. Blood substitutes useful for the methods of the present invention can (1) induce expression of erythropoietin as tested in a cell culture under normoxic conditions, and/or (2) induce erythropoiesis under normoxic conditions as measured by (a) a decrease in the doubling time of the subject's hematocrit or hemoglobin, and/or (b) an increase in the subject's circulating erythropoietin level. Blood substitutes useful for the pharmaceutical compositions of the present invention can (1) stabilize HIF-I alpha expression, and/or (2) down regulate NF-kappa B. Preferably, the blood substitutes are cross-linked hemoglobin blood substitutes, or more preferably, cross-linked hemoglobins that comprise a hemoglobin that is cross-linked intramolecularly with periodate-oxidized ATP5 cross-linked intermolecularly with periodate-oxidized adenosine, and conugated with reduced glutathione.