84 results about "Vascular leakage" patented technology

Disclosed herein are methods for treating a vascular leak disorder, hypotension, or a procoagulant state using angiopoietin-2 (Ang-2) antagonist compounds. Also disclosed are methods for treating a vascular leak disorder associated with high dose IL-2 therapy using angiopoietin-2 antagonist compounds. Methods for diagnosing and monitoring vascular leak disorders, hypotension, or a procoagulant state that include the measurement of Ang-2 polypeptide or nucleic acid levels are also disclosed. Methods for inducing a vascular leak using an Ang-2 agonist are also disclosed.

The present invention relates to development of efficacious intravitreal pharmaceutical compositions comprising a poorly water soluble agent with anti-angiogenic and/or anti vascular leakage properties in a therapeutically effective amount and a co-solvent in a suitable amount to treat or prevent diseases due to ocular neovascularization and enhanced vascular permeability. Other aspects of the invention details the development of efficacious compositions for the treatment of the said diseases via periocular, topical and oral administration.

The present invention relates to the field of pathological angiogenesis and arteriogenesis. in particular, a stress induced phenotype in a transgenic mouse (PIGF-/-) that does not produce Placental Growth Factor (PIGF) and that demonstrates an impaired vascular endothelial growth factor (VEGF)-dependent response. PIGF-deficiency has a negative influence on diverse pathological processes of angiogenesis, arteriogenesis and vascular leakage comprising ischemic retinopathy, tumour formation, pulmonary hypertension, vascular leakage (oedema formation) and inflammatory disorders. Molecules that can inhibit the binding of PIGF to its receptor (VEGFR-1), such as monoclonal antibodies and tetrameric peptides. Further, the use of these molecules to treat the latter pathological processes.

The present invention is directed to a method of inhibiting at least one of vascular leakage, inflammation and fibrosis in an animal by administering to the animal a vascular leakage inhibiting amount of a composition, wherein at a substantially higher amount the composition is effective in inhibiting angiogenesis, and wherein the anti-angiogenic activity of the composition is separate from the vascular leakage inhibiting activity of the composition. The animal experiencing at least one of vascular leakage, inflammation and fibrosis has a disease selected from the group consisting of diabetes, chronic inflammation, brain edema, arthritis, uvietis, macular edema, cancer, hyperglycemia, a kidney inflammatory disease, a disorder resulting in kidney fibrosis, a disorder of the kidney resulting in proteinuria, and combinations thereof. The composition capable of inhibiting at least one of vascular leakage, inflammation and fibrosis is selected from the group consisting of angiostatin, fragments of angiostatin, analogs or derivatives of angiostatin, kringle 5 of plasminogen, fragments of kringle 5 of plasminogen, analogs or derivatives of kringle 5 of plasminogen, pigment epithelium-derived factor, fragments of pigment epithelium-derived factor, analogs or derivatives of pigment epithelium-derived factor and combinations thereof.

Compositions and methods and are provided for treating disorders associated with compromised vasculostasis. Invention methods and compositions are useful for treating a variety of disorders including for example, stroke, myocardial infarction, cancer, ischemia/reperfusion injury, autoimmune diseases such as rheumatoid arthritis, eye diseases such as uveitis, retinopathies or macular degeneration, macular edema or other vitreoretinal diseases, inflammatory diseases such as autoimmune diseases, vascular leakage syndrome, edema, or diseases involving leukocyte activation, transplant rejection, respiratory diseases such as asthma, adult or acute respiratory distress syndrome (ARDS), chronic obstructive pulmonary disease, and the like.

The present invention also provides methods and compositions for imaging and evaluating, e.g., blood flow or inflammation in a subject. Such evaluations are important in a number of clinical diagnoses, including assessing organ damage associated with angina pectoris, heart attack, stroke, cancer, atherosclerosis, and the like, as well as assessing vessel leakages associated with aneurisms, diffuse bleedings after trauma, and the like.

The present invention is directed to methods of treating disorders of ocular angiogenesis or vascular leakage in a patient by administration of suitable inhibitors, including pazopanib or pharmaceutically acceptable salts or hydrates thereof.

A PGD(2) receptor (DP) deficiency enhances tumor progression accompanied by abnormal vascular expansion. In tumors, angiogenic endothelial cells highly express DP receptor, and its deficiency accelerates vascular leakage and angiogenesis. Administration of a synthetic DP agonist, BW245C, markedly suppresses tumor growth as well as tumor hyperpermeability in WT mice, but not in DP-deficient mice. In a corneal angiogenesis assay and a modified Miles assay, host DP deficiency potentiates angiogenesis and vascular hyperpermeability under COX-2-active situation, whereas exogenous administration of BW245C strongly inhibits both angiogenic properties in WT mice. In an in vitro assay, BW245C does not affect endothelial migration and tube formation, processes that are necessary for angiogenesis; however, it strongly improves endothelial barrier function via an increase in intracellular cAMP production. PGD(2)/DP receptor is a newly identified regulator of tumor vascular permeability, indicating DP agonism can be exploited as a therapy for the treatment of cancer.

The invention discloses a use of a derived polypeptide series of pigment epithelium derived factors in ischemic myocardium protection. The polypeptide is derived from the pigment epithelium derived factors, and every amino acid sequence in the polypeptide includes at least eighteen continuous amino acid residues. The PEDF derived functional peptide has good function advantages, and has remarkablecardiac muscle tissue capillary tube stabilization, vascular leakage prevention, myocardial cell protection and cardiac muscle tissue inflammation prevention effects.

The present invention relates to a novel composition and method for loading delivery systems such as liposome compositions with radionuclides useful in targeted diagnostic and/or therapy of target site, such as cancerous tissue and, in general, pathological conditions associated with leaky blood vessels. The composition and methods of the invention find particular use in diagnosing and imaging cancerous tissue and, in general, pathological conditions associated with leaky blood vessels in a subject. The present invention provides a new diagnostic tool for the utilization of positron emission tomography (PET) imaging technique. One specific aspect of the invention is directed to a method of producing nanoparticles with desired targeting properties for diagnostic and/or radio-therapeutic applications.

The present invention relates to method of treating a patient with a condition involving increased vascular permeability or increased angiogenesis comprising administering to the patient a therapeutically effective amount of PEDF, PEDF 44 AA peptide, a homolog of the PEDF 44 AA peptide, a homolog of the PEDF 44 AA peptide wherein amino acid residues glutamate the (101) amino acid position, isoleucine at the (103) amino acid position, leucine at the (112) and serine at the (115) amino acid position are unchanged, or an agent that activates the PEDF receptor. Conditions for treatment include, but are not limited to, sepsis acute respiratory distress syndrome, nephrotic syndrome, diabetic neuropathy, preproliferative diabetic retinopathy, cancer or proliferative diabetic retinopathy.

The invention is directed to a method of prophylactically or therapeutically treating an animal for vascular leakage in an eye. The method comprises administering to an animal in need thereof an expression vector comprising a nucleic acid sequence encoding pigment epithelium-derived factor (PEDF) such that vascular leakage in the eye of the animal is treated prophylactically or therapeutically. The invention also provides a method of prophylactically or therapeutically treating an animal for vascular leakage in an eye. The method comprises periocularly administering to an animal in need thereof PEDF such that vascular leakage of the animal is treated prophylactically or therapeutically. The invention also provides a method of prophylactically or therapeutically treating an animal for non-diabetic vascular leakage in an eye. The method comprises administering to an animal in need thereof PEDF such that non-diabetic vascular leakage in the eye is treated prophylactically or therapeutically.

The present invention relates to the identification of a microRNA, designated miR-126, that is a regulator of vascular integrity in endothelial cells. This endothelial cell-restricted microRNA mediates developmental angiogenesis in vivo, and targeted deletion of miR-126 in mice causes leaky vessels, hemorrhaging, and partial embryonic lethality, due to a loss of vascular integrity and defects in endothelial cell proliferation, migration, and angiogenesis. These vascular abnormalities resemble the consequences of diminished signaling by angiogenic growth factors, such as VEGF and FGF. These findings have important therapeutic implications for a variety of disorders involving abnormal angiogenesis and vascular leakage. Methods of treating disease states characterized by ischemia, vascular damage, and pathologic neovascularization by modulating miR-126 function are disclosed.

The invention discloses recin vaccine related protein, coded genes thereof and application thereof. The protein provided by the invention is named as mRTA and is shown as the following 1) or 2): 1) the protein consists of an amino acid residue sequence of a sequence 2 in a sequence table; or 2) the protein is derived from 1), has the same function, and is formed by substituting and/or deleting and/or adding one or more amino acid residues of the amino acid residue sequence of the sequence 2 in the sequence table. A test proves that the mutant mRTA obtained by point mutation is the recin A chain mutant protein obtained by recombinant expression. According to detection, the recin A chain mutant protein has the characteristics of low toxicity, no vascular leakage, high immunogenicity and thelike and can serve as candidate vaccine antigen.

The present invention is directed to the technical field of imaging compositions useful for diagnosing cancer and other diseases in a subject. In particular, the invention relates to a class of diagnostic compounds comprising a novel liposome composition with encapsulated metal entities such as radionuclides, for example ⁶¹Cu and ⁶⁴Cu copper isotopes. The invention further relates to a novel method for loading delivery systems, such as liposome compositions, with metal entities such as radionuclides, and the use of liposomes for targeted diagnosis and treatment of a target site, such as cancerous tissue and, in general, pathological conditions associated with leaky blood vessels. The present invention provides a new diagnostic tool for the utilization of positron emission tomography (PET) imaging technique.

The present invention is directed to a method of inhibiting at least one of vascular leakage, angiogenesis, inflammation and fibrosis in an animal by administering to the animal an effective amount of a composition, wherein the composition is selected from the group consisting of kallistatin, fragments of kallistatin, analogs or derivatives of kallistatin, and combinations thereof.

We describe methods and compositions for treating ophthalmic conditions associated with angiogenesis, vascular leakage, and/or damage to ganglia.

The invention discloses a recombinant protein AGGF1. The recombinant protein AGGF1 can improve the cardiac function of a mouse with acute myocardial infarction and inhibit myocardial apoptosis and cardiac fibrosis by promoting angiogenesis in the heart of the mouse. Thus, the recombinant protein AGGF1 can be used for preparation of angiogenesis promoting drugs for treatment of ischemic diseases. Meanwhile, the recombinant protein AGGF1 can improve the cardiac function of the mouse and inhibit cardiac fibrosis by inhibiting vascular leakage and oedema in cardiac muscles after the operation of cardiac ischemia reperfusion. Thus, the recombinant protein AGGF1 provided by the invention can be used for preparation of drugs for inhibiting vascular leakage to treat vascular leakage, oedema and dysfunction caused by cardiac ischemia reperfusion.