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127 results about "Hepcidin" patented technology
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Hepcidin is a protein that in humans is encoded by the HAMP gene. Hepcidin is a key regulator of the entry of iron into the circulation in mammals. During conditions in which the hepcidin level is abnormally high, such as inflammation, serum iron falls due to iron trapping within macrophages and liver cells and decreased gut iron absorption. This typically leads to anemia due to an inadequate amount of serum iron being available for developing red blood cells. When the hepcidin level is abnormally low such as in hemochromatosis, iron overload occurs due to increased ferroportin mediated iron efflux from storage and increased gut iron absorption.
The present invention concerns a method for the oxidative refolding of a hepcidin polypeptide to a form that is mature, bioactive and folded as in the native configuration and molecular mass; a method for measuring the level of native, bioactive hepcidin in a vertebrate animal; a method for measuring the level of hepcidingene expression in a vertebrate animal; and a method for regulating the production of native, bioactive hepcidin in a vertebrate animal in vivo. The present invention also concerns an antibody or fragment thereof that specifically binds to a continuous, discontinuous, and / or conformational epitope of a mature and bioactive hepcidin folded as in the native configuration; and a pharmaceutical composition that includes the antibody or a hepcidin polypeptide and that provides antimicrobial, agonistic, or antagonistic activities in vivo in a vertebrate animal.
The present invention concerns antibodies specific for the C-terminus of human hepcidin, and related methods and kits for diagnosing and / or treating a disease condition characterized by non-physiological levels of hepcidinprotein, including prohepcidin and fragments thereof, comprising obtaining a tissue or fluid sample from a subject; contacting the sample with an antibody or fragment thereof that specifically binds to a polypeptide corresponding to the amino acid sequence between and including amino acids 60 and 84, or, in another embodiment, amino acids 74 and 81, as aligned with the human pre-pro-hepcidin precursor protein, and quantifying the pro-hepcidin and / or mature hepcidin level using an assay based on binding of the antibody and the polypeptide; wherein the non-physiological level of prohepcidin / mature hepcidin is indicative of the disease condition. The present invention also concerns diagnostic methods and kits for applications in genetic technological approaches, such as for overexpressing or downregulating hepcidin.
The present invention mainly relates to formation of zebrafish with hepcidingene knocked out, by the use of CRISPR / Cas9 technology, a unique PAM region is designed, so that the hepcidingene in the zebrafish is knocked out, and other genes are not accidentally injured. The first case of hepcidin knockout transgenic animal modelzebrafish has great significance, the hepcidin is a major factor in the regulation of iron, once the hepcidin is knocked out, an animal model can be successfully molded into an iron overload animal model, the human factor intervention can be excluded, the hepcidin has great significance to iron expression researches, meanwhile compared with the traditional gene knockout technology, the CRISPR / Cas9 technology has low toxicity, high accuracy, high efficiency, short success cycle and other characteristics, and the hepcidin gene can be faster knocked out.
The present invention concerns methods and kits for diagnosing a disease condition characterized by non-physiological levels of hepcidin, comprising obtaining a tissue or fluid sample from a subject; contacting the sample with an antibody or fragment thereof that specifically binds to a polypeptide corresponding to the mid-portion or C terminus of a hepcidinprotein, and quantifying the hepcidin level using an assay based on binding of the antibody and the polypeptide; wherein the non-physiological level of hepcidin is indicative of the disease condition. The present invention also concerns diagnostic methods and kits for applications in genetic technological approaches, such as for overexpressing or downregulating hepcidin. The present invention further concerns therapeutic treatment of certain diseases by treatment of subjects with hepcidin and agonists or antagonists of hepcidin.
The present invention provides kits and methods for the diagnosis, prognosis and prediction of sepsis in a subject or for the differentiation between sepsis and SIRS in a subject, the method comprising(a) measuring the level of pro-hepcidin (pro-HEPC) in a biological sample taken from said subject, (b) measuring the level of at least one further biomarker selected from the group consisting of soluble TNF-receptor 2 (sTNFR2), Pentraxin-3 (PTX-3), Macrophage Colony-Stimulating Factor (MCSF), pro-Brain Natriuretic Protein (pro-BNP), one or more members of the Histoneprotein family, Procalcitonin (PCT) and c-Reactive Protein (CRP) in a biological sample from said subject, (c) using said measurements obtained in steps (a) and (b) to create a profile for said biomarkers and (d) comparing said profile with a reference biomarker profile obtained form a patient having SIRS or from a healthy subject.
The present invention provides novel hepcidin analogues, and related methods of using these hepcidin analogues to treat or prevent a variety of diseases and disorders, including iron overload diseases such as hereditary hemochromatosis, iron-loading anemias, and other conditions and disorders described herein.
The present invention relates, inter alia, to certain hepcidinpeptide analogues, including peptides and dimers thereof, and to the use of the peptides and peptide dimers in the treatment and / or prevention of a variety of diseases, conditions or disorders, including treatment and / or prevention of iron overload diseases, which include hereditary hemochromatosis and iron-loading anemias, and other conditions and disorders described herein.
The present invention relates, inter alia, to certain hepcidinpeptide analogs, including peptides and dimers thereof, and to the use of the peptides and peptide dimers in the treatment and / or prevention of a variety of diseases, conditions or disorders, including treatment and / or prevention of iron overload diseases, which include hereditary hemochromatosis and iron-loading anemias, and other conditions and disorders described herein.
The invention discloses a large yellow croaker hepcidinantibacterial peptide and a preparation method thereof, relating to fish geneengineering in the biotechnology field, and providing a large yellow croaker hepcidinantibacterial peptide and a preparation method thereof. The preparation method of the large yellow croaker hepcidinantibacterial peptide comprises the following steps: cloning a large yellow croaker hepcidin antibacterial peptidegene; constructing a recombinant vector; converting a host cell; selecting positive clone for prokaryotic expression; separating and purifying an expression product; and obtaining the large yellow croaker hepcidin antibacterial peptide. During separation and purification, the yield of protein is improved, thus solving the problem of proteinprecipitation when the hepcidin antibacterial peptide expresses renaturation. The solution has simple preparation and low cost. The prepared large yellow croaker hepcidin antibacterial peptide has high broad-spectrum antimicrobial activity, can be used for scientific researches, can serve as feed additive for preventing and curing diseases of sea farming fishes and has wide application prospect.
The invention discloses an RNA with little interference for inhibiting the expression of an iron regulating element regulatory protein (HJV). The RNA with little interference is in reverse complementation with the iron regulating element regulatory proteingene mRNA, and the length of the RNA is 19-27bp. The invention further discloses a DNA for coding the corresponding shRNA of the RNA with little interference and a recombined slow virus capable of expressing the shRNA. The RNA with little interference, the DNA capable of coding the shRNA and the recombined slow virus can effectively inhibit the expression of the iron regulating element regulatory proteinin vivo, improve the level of the iron regulating element and reduce the level of serum iron in vivo, thereby reaching the aim of curing diseases related to iron metabolism.
The present invention concerns the use of hepcidin as a marker for detecting inflammatory chronic diseases and especially for a differential diagnosis to detect inflammatory chronic diseases and / or non-inflammatory chronic diseases. The present invention also concerns a method for detecting inflammatory chronic diseases, non-inflammatory chronic diseases and / or acute phase reactions comprising the determination of hepcidin.
The present invention concerns methods and kits for diagnosing a disease condition characterized by non-physiological levels of hepcidinprotein, including prohepcidin and fragments thereof, comprising obtaining a tissue or fluid sample from a subject; contacting the sample with an antibody or fragment thereof that specifically binds to a polypeptide corresponding to the mid-portion or C terminus of a hepcidinprotein, and quantifying the hepcidin level using an assay based on binding of the antibody and the polypeptide; wherein the non-physiological level of hepcidin is indicative of the disease condition. The present invention also concerns diagnostic methods and kits for applications in genetic technological approaches, such as for overexpressing or down-regulating hepcidin. The present invention further concerns therapeutic treatment of certain diseases by treatment of subjects with hepcidin and agonists or antagonists of hepcidin.
A scophthalmus maximus peptidehepcidingene and its yeastexpression vector, the method is to separate and clone Scophthalmus maximus peptide cDNA and ití»s gene groupí»s gene, regroup this geneí»s mature peptides to yeastcellexpression vector®ñpGAPZB, then to form confluent expression vector®ñpGAPZB-the6his, and conversion Pichia pastoris strain SMD1168ú¼and get the yeastplant that can express mature peptide albumen steadily, this peptide gene can be considered to finish expression by passing the SDS-PAGE and Western blot test. This invention clone Scophthalmus maximums peptide gene and form mature yeast expression vector in the cell at the first time, it can be used as fish and other aquatic animalí»s feed additive by yeast form directly, and it doní»t request to separate and purificate the regroup peptideíúThe invention also can be used to clone many fishí»s peptidegene and its expression vector, and used to prevention and cure fish and other aquatic animalí»s disease.
Provided are methods and compositions for predicting the development of kidneydisease, including acute kidney injury. In certain aspects and embodiments the provided methods and compositions are particularly useful for predicting kidney injury following an event likely to cause kidney injury and / or kidney failure in a patient, such as a cardiac surgery, e.g., a surgery involving a cardiopulmonary bypass (CPB), such as a coronary artery bypass graft surgery. In some embodiments, the higher the urinary hepcidin-to-urinary creatinine ratio (uHep / uCr) at 6-24 hours following initiation of CPB, the lower is the risk for development of AKI determined by RIFLE criteria in the ensuing four to five days. Conversely, the higher the urinary NGAL to urinary creatinine ratio (uNGAL / uCr) at 6-24 hours following initiation of CPB, the higher is the risk of developing CPB-mediated AKI over the same time period.
The present invention discloses a recombinant human hepcidin adenovirus (Ad-hepc), which contains human hepcidingene and adenovirus vector. The present invention also discloses a preparation of the recombinant human hepcidin adenovirus and an application thereof. The present invention utilizes defective adenovirus to deliver the human hepcidin gene into the tissue cells of the body, so that the virus can express hepcidin protein in the body of a patient.