75 results about "Complement inhibitor" patented technology

Polymeric delivery devices have been developed which combine high loading/high density of molecules to be delivered with the option of targeting. As used herein, “high density” refers to microparticles having a high density of ligands or coupling agents, which is in the range of 1000-10,000,000, more preferably between 10,000 and 1,000,000 ligands per square micron of microparticle surface area. A general method for incorporating molecules into the surface of biocompatible polymers using materials with an HLB of less than 10, more preferably less than 5, such as fatty acids, has been developed. Because of its ease, generality and flexibility, this method has widespread utility in modifying the surface of polymeric materials for applications in drug delivery and tissue engineering, as well other other fields. Targeted polymeric microparticles have also been developed which encapsulate therapeutic compounds such as drugs, cellular materials or components, and antigens, and have targeting ligands directly bound to the microparticle surface. Preferred applications include use in tissue engineering matrices, wound dressings, bone repair or regeneration materials, and other applications where the microparticles are retained at the site of application or implantation. Another preferred application is in the use of microparticles to deliver anti-proliferative agents to the lining of blood vessels following angioplasty, transplantation or bypass surgery to prevent or decrease restenosis, and in cancer therapy. In still another application, the microparticles are used to treat or prevent macular degeneration when administered to the eye, where agents such as complement inhibitors are administered.

Polymeric microparticles have been developed which encapsulate therapeutic compounds such as drugs, cellular materials or components, and antigens, and can have targeting ligands directly bound to the microparticle surface. Preferred applications include use in tissue engineering matrices, wound dressings, bone repair or regeneration materials, and other applications where the microparticles are retained at the site of application or implantation. Another preferred application is in the use of microparticles to deliver anti-proliferative agents to the lining of blood vessels following angioplasty, transplantation or bypass surgery to prevent or decrease restenosis, and in cancer therapy. In still another application, the microparticles are used to treat or prevent macular degeneration when administered to the eye, where agents such as complement inhibitors are administered.

This invention proposes that the best therapeutic strategy for treating and/or preventing Alzheimer's disease (AD), age related macular degeneration (AMD) and other diseases that exhibit extra-cellular debris deposits, such as atherosclerosis, is the inhibition of the complement pathway. A model for the accumulation of extra-cellular debris through the activation of the complement pathway is presented, and the primary pathogenic role of the debris in the etiology of the disorders is explained. Previously identified complement inhibitors are identified as therapeutic agents for the treatment and/or prevention of AD, AMD and other diseases that exhibit extra-cellular debris deposits.

Methods for the treatment of sepsis with complement inhibitors are disclosed. In particular, C3 inhibitors, such as Compstatin and Compstatin analogs, are administered at various times following the onset of sepsis to alleviate tissue damage and organ failure, which are hallmarks of the second, extravascular stage of sepsis. Combination therapies for comprehensive treatment of sepsis are also disclosed. Pharmaceutical compositions and kits for use in the methods are disclosed as well.

A method for preventing or treating meconium aspiration syndrome (“MAS”) by administering a meconium aspiration syndrome preventing or treating amount of one or more complement inhibitors to a patient likely to develop or suffering from MAS. The complement inhibitors are preferably antibodies that bind to and inhibit complement proteins involved in the formation of the membrane attach complex, preferably anti-Factor D or anti-C5 antibodies. The complement inhibitors can be used alone or in combination with other MAS therapies to decrease the morbidity and mortality caused by MAS.

The present invention pertains to the use of a complement inhibitor in methods of treatment of ocular disorders and the use of a complement inhibitor in the manufacture of a medicament in the treatment of an ocular disorder.

The present invention includes compositions comprising one or more complement inhibitors and one or more CD14 pathway inhibitors for the prevention or treatment of sepsis. The complement inhibitors may be antibodies that bind to and inhibit complement proteins such as C5a and the CD14 pathway inhibitors may be antibodies that bind to and inhibit CD14 pathway components, such as CD14 and LPS. The invention also relates to methods of treating subjects suffering from sepsis comprising administering these compositions, as well as kits for supplying the compositions for treatment.

The present invention features the use of a complement inhibitor, e.g., a compstatin analog for treating an individual who has suffered a severe injury. In some embodiments, the complement inhibitor may be administered within 24 hours following the injury and optionally also at later time points. The complement inhibitor may, for example, be administered prior to transporting the patient to a health care facility, during transport of the patient to a health care facility, or in the emergency department. Further provided are methods of selecting individuals for such therapy. Further provided are methods of identifying individuals at increased risk of poor outcome following trauma. In certain embodiments the methods comprise determining whether the genotype of the patient includes an allele of a polymorphism in or near a complement-related gene, wherein said allele is associated with risk of poor outcome following trauma.

The invention relates to complement inhibitors that inhibit both the classical and alternative complement pathways. In particular, the invention relates to complement inhibitors derived from the salivary glands of haematophagous arthropods that inhibit both the classical and alternative complement pathways. The invention also relates to the use of such complement inhibitors in the treatment and prevention of diseases.

The present disclosure is directed to methods and compositions for treating osteoarthritis and preventing osteoarthritis, by administering a compound that modulates one or more components in the complement system. In one embodiment, a compound that inhibits a component in the complement system is administered to prevent, delay the progression of, or treat osteoarthritis. In other embodiments, compounds with specific inhibition of a component in a particular pathway in the complement system, such as the alternative, mannose binding lectin, and/or classical pathway, are administered to a subject having osteoarthritis or at risk of developing osteoarthritis.

Methods for treating, preventing or delaying onset of tumor formation and other forms of cancer are disclosed. The methods involve administration of a complement inhibitor to inhibit C5a receptor signaling in the tumor microenvironment.

A pharmaceutical combination comprising an accelerated lymphocyte homing agent in free form or in pharmaceutically acceptable salt form, and one or more compounds selected from the group consisting of an antibody to the IL-2 receptor, an immunosuppressive macrocyclic lactone and a soluble human complement inhibitor is used to treat or prevent insulin-producing cell graft rejection.

The present disclosure provides therapeutic agents for the treatment of age-related macular degeneration (AMD) and other eye disorders. One or more therapeutic agents can be used to treat any stages (including the early, intermediate and advance stages) of AMD, and any phenotypes of AMD, including geographic atrophy (including non-central GA and central GA) and neovascularization (including types 1, 2 and 3 NV). In certain embodiments, an anti-dyslipidemic agent (e.g., an apolipoprotein mimetic and/or a statin) is used alone to treat or slow the progression of atrophic AMD (including early AMD and intermediate AMD), and/or to prevent or delay the onset of AMD, advanced AMD and/or neovascular AMD. In further embodiments, two or more therapeutic agents (e.g., any combinations of an anti-dyslipidemic agent, an antioxidant, an anti-inflammatory agent, a complement inhibitor, a neuroprotector and an anti-angiogenic agent) that target multiple underlying factors of AMD (e.g., formation of lipid-rich deposits, oxidative stress, local inflammation, cell death and neovascularization) are used to treat or slow the progression of atrophic AMD (including non-central GA and central GA) or neovascular AMD (including types 1, 2 and 3 NV), and/or to prevent or delay the onset of AMD, advanced AMD and/or neovascular AMD.

The invention belongs to the field of manufacturing of traditional Chinese medicines, and relates to phenolic glycoside compounds in Paeonia suffruticosa Andr. velamen and novel application of the compounds in anticomplement medicine preparation. According to the invention, a modern pharmacological research method is adopted, dried velamen anticomplement active materials of Paeonia suffruticosa Andr. belonging to Paeonia L. are researched, six phenolic glycoside compounds are separated at an n-butyl alcohol extraction position of a 95% ethanol extract, and the phenolic glycoside compounds are verified to have inhibiting effects on a complement system classical pathway and an alternative pathway. The inhibiting effect CH<50> of the compounds on the complement system classical pathway is 0.062-0.364 mg/mL, and the inhibiting effect AP<50> on the alternative pathway is 0.102-0.566 mg/mL. The compounds can be used to prepare complement inhibitors.

The invention provides the application of caffeoylquinic acid and its derivatives in the preparation of anti-complement drugs. The present invention extracts and separates the caffeoylquinic acid compounds obtained from Shamrock, through in vitro experiments, it is confirmed that the cell hemolysis caused by the activation of the classic pathway of the complement system is inhibited, indicating that there is an anti-complement effect. The activity is stronger than that of the total extract of S. sageris, and it is a kind of good complement inhibitor, which can be used to prepare new anti-complement drugs and treat various diseases caused by abnormal activation of complement, and has low effective concentration and low toxicity. The drug is safe, the source of raw materials is abundant, and it has great clinical application value. Caffeoylquinic acid and its derivatives are shown in the following structural formula I: Formula I wherein R1, R2, R3, or R4 can be the same or different, and they are H or caffeoyl respectively, provided that they cannot be H at the same time; R5 is H , CH3, CH2CH3 or CH2CH2CH2CH3.

Methods of prolonging survival of a transplanted organ, as well as methods of preventing or attenuating rejection of a transplanted organ are provided. These methods involve contacting the organ with an inhibitor of complement activity (e.g., a complement inhibitor that has a maximum molecular weight of 70 kDa and/or a half-life shorter than 10 days, such as a CR2-FH fusion protein or a single chain anti-C5 antibody), prior to transplantation The methods also include administering to the allotransplant recipient an inhibitor of complement activity together with one or more immunosuppressants. A pretreatment with an alternative complement inhibitor was found to be effective in improving graft survival and decreasing ischemia-reperfusion injury in animal.

The invention discloses acylated flavonoid glycoside compounds shown as a formula I and application thereof in preparation of complement inhibitor medicines. Acylated flavonoid glycosides extracted and separated from cudweed herb are proved to inhibit hemolysis caused by activation of a complement system in a classical pathway through in vitro experiments, and have complement inhibition effect; the activity of each monomericcompound is higher than that of a total extract of cudweed herb; and the acylated flavonoid glycoside compounds are good complement inhibitors and have low effective concentration, can serve as active ingredients to prepare novel complement inhibitor medicines for treating various diseases caused by abnormal activation of complements, are low in toxicity, safe in administration and rich in raw material sources and have great clinical application value. The structure of the formula I is shown as the specifications, wherein R1 and R2 are same or different, and respectively H, OH or OCH3; and R3 and R4 are respectively H or groups shown in the specifications.

This invention provides a nonhuman transgenic mammal carrying transgene comprising the regulatory genes capable of functioning in the hyperacute rejection-occurring local cells and gene encoding human N-acetylglucosaminyltransferase III (GnT-III), or a nonhuman transgenic mammal carrying transgene comprising the regulatory genes and genes encoding GnT-III and the human complement inhibitor. Because of reduced α-Gal antigens in the hyperacute rejection-occurring local cells or because of both reduced α-Gal antigens and expression of the human complement inhibitor, the transgenic mammal of this invention can effectively inhibit the hyperacute rejection caused by discordant xenotransplantation. Consequently, this invention provides the transgenic mammal suitable for organ transplantation.

The invention discloses a fusion protein of a single-chain antibody of a human anti-complement C3d molecule and a complement inhibitor CD59. The antibody has excellent antigen binding activity. Biological distribution experiments prove that the fusion protein provided by the invention can be rapidly and highly aggregated at an arthritis part after entering a rheumatoid arthritis mouse model, and has an excellent anti-adhesion/anti-inflammation targeting inhibition effect. In treatment of MRL/lpr lupus erythematosus mice, the fusion protein provided by the invention can obviously improve the survival rate of the mice, and symptoms of proteinuria, glomerular score, interstitial inflammation, vasculitis, crescent/necrosis and the like of a treatment group are obviously improved, so that the fusion protein provided by the invention has an excellent application prospect in preparation of medicaments for treating autoimmune diseases.