55 results about "Protozoan infection" patented technology

The invention is directed to a treatment of diseases that are accompanied by quantitative and / or qualitative changes of blood extracellular DNA and, more particularly, to a treatment of systemic bacterial, fungal and protozoan infections. The inventive method comprises introducing a treatment agent into a circulating blood system of a patient diagnosed with systemic infection caused by bacteria, fungi or protozoa, wherein said treatment agent destroys extracellular DNA in said blood of said patient and wherein said treatment agent used to destroy said extracellular DNA is a DNase enzyme: said agent being administered in doses and regimens which are sufficient to decrease the average molecular weight of circulating extracellular blood DNA in the blood of said patient; such decrease in the average molecular weight can be measured by gel electrophoresis of extracellular blood DNA fraction from the blood of said patient. A DNase enzyme may be applied in a dose and regimen that provide a DNase DNA hydrolytic activity measured in blood plasma that exceeds 1.5 Kunitz units per 1 ml of blood plasma for more than 12 hours within a period of 24 hours.

The invention provides therapeutic antimicrobial compositions and methods for their use based on natural organic phenolic compounds combined with pharmacological agents. The antimicrobial activities of each carvacrol and thymol are believed to be enhanced, while the pharmacological properties of procaine and related compounds are added to provide their unique properties to facilitate usefulness and effectiveness in humans. The therapeutic compositions are active against bacterial, fungal, and protozoan infections. The forms of the invention are intended to treat various internal infections through parenteral, subcutaneous, intradermal, intravenous, and intramuscular injections. They are also intended as useful agents to treat microbial infections that have become resistant to conventional anitibiotics as well as secondary opportunistic infections.

Polypeptide and polynucleotide vaccines effective to treat or prevent infection of a mammal, such as a dog, a cat, or a human, by a protozoan. Methods of treatment and prevention are also provided, including therapeutic administration of the vaccine to an infected mammal to prevent progression of infection to a chronic debilitating disease state. Preferred embodiments of the polynucleotide vaccine contain nucleotide coding regions that encode polypeptides that are surface-associated or secreted by T. cruzi. Optionally the efficacy of the polynucleotide vaccine is increased by inclusion of a nucleotide coding region encoding a cytokine. Preferred embodiments of the polypeptide vaccine include immunogenic peptides that contain membrane transducing sequences that allow the polypeptides to translocate across a mammalian cell membrane.

Non-hemolytic cytolytic agents selected from peptides, complexes of bundled peptides, mixtures of peptides or random peptide copolymers have a selective cytolytic activity manifested in that they have a cytolytic activity on pathogenic cells, being cells which are non-naturally occurring within the body consisting of microbial pathogenic organisms and malignant cells; and are non-hemolytic, having no cytolytic effect on red blood cells. The peptides may be cyclic derivatives of natural peptides such as pardaxin and mellitin and fragments thereof in which L-amino acid residues are replaced by corresponding D-amino acid residues, or are diastereomers of linear peptides composed of varying ratios of at least one positively charged amino acid and at least one hydrophobic amino acid, and in which at least one of the amino acid residues is a D-amino acid. Pharmaceutical compositions comprising the non-hemolytic cytolytic agents can be used for the treatment of several diseases caused by pathogens including antibacterial, fungal, viral, mycoplasma and protozoan infections and for the treatment of cancer.

The present invention relates to novel, non-peptidic small organic compounds having an affinity for cyclophilin (CyP)-type immunophilin proteins. In the compounds of this invention, at least two carbo- or heterocyclic groups are attached to a central saturated, partially saturated, or aromatic 5-6 membered carbocyclic ring by a combination of straight or branched linker chains. The invention further relates to pharmaceutical compositions comprising one or more of the said compounds, and to the uses of these compounds and compositions for binding CyP-type proteins, inhibiting their peptidyl-prolyl isomerase activity, and for research, development, and therapeutic applications in a variety of medical disorders, such as neurological disorders, hair loss disorders, ischemic disorders, and disorders caused by viral or protozoan infection.

A treatment for the diseases that are accompanied by quantitative and qualitative changes of blood extracellular DNA and, more particularly, to a treatment of systemic bacterial, fungal and protozoan infections. The inventive method consist from introducing a treatment agent into a circulating blood system of a patient diagnosed with systemic infection caused by bacteria, fungi or protozoa when said treatment agent destroys extracellular DNA in said blood of said patient and wherein said treatment agent used to destroy said extracellular DNA is a DNASE enzyme: said agent must be administered in doses and regimens which sufficient to decrease number average molecular weight of circulating extracellular blood DNA in the blood of said patient; such decrease of number average molecular weight might be measured by gel electrophoresis of extracellular blood DNA fraction from the blood of said patient. A DNASE enzyme may be further applied in a dose and regime that provide a DNA hydrolytic activity measured in blood plasma exceeding 1.5 Kunitz units per 1 ml of blood plasma for more than 12 hours within a period of 24 hours.

Non-hemolytic cytolytic agents selected from peptides, complexes of bundled peptides, mixtures of peptides or random peptide copolymers have a selected cytolytic activity manifested in that they have a cytolytic activity on pathogenic cells, being cells which are non-naturally occurring with the body consisting of microbial pathogenic organisms and malignant cells; and are non-hemolytic, having no cytolytic effect on red blood cells. The peptides may be cyclic derivatives of natural peptides such as pardaxin and mellitin and fragments thereof in which L-amino acid residues are replaced by corresponding D-amino acid residues, or are diastereomers of linear peptides composed of varying ratios of at least positively charged amino acid and at least one hydrophobic amino acid, and in which at one of the amino acid residues is a D-amino acid. Pharmaceutical compositions comprising the non-hemolytic cytolytic agents can be used for the treatment of several diseases caused by pathogens including antibacterial, fungal, viral mycoplamsa and protozoan infections and for the treatment of cancer.

The present disclosure is directed to interleukin-10 (IL-10) peptides and isolated antibodies that specifically bind to the IL-10 peptides. The IL-10 peptides and the isolated antibodies may be administered alone or as an animal feed additive to treat gastrointestinal protozoan infection in animals.

A composition that can be used as a vaccine containing means for targeting at least one antigen to dendritic cells and as adjuvants a granulocyte macrophage colony stimulating factor and a CpG oligodeoxynucleotide and / or a CpG-like oligodeoxynucleotide. This composition can used to treat cancers, infectious diseases caused by bacterial, viral, fungal, parasitic or protozoan infections, allergies and / or autoimmune diseases.

This invention relates to bis-flavonoid compounds, their synthesis and use for inhibiting multidrug resistance in chemotherapy and protozoan infection, wherein the bis-flavonoids compounds have the formula:

The invention relates to an amino-acid ester water-soluble derivative of (S)-ornidazole and application thereof. the amino-acid ester of (S)-ornidazole has a structure as shown in the formula (I), wherein R and (HnX)m are defined in the claims. The invention also relates to a preparation method of the compound as shown in the formula (I), pharmaceutical salt thereof, a pharmaceutical composition containing the compound and the pharmaceutical salt and application of the pharmaceutical composition used as a medicine, especially application of the pharmaceutical composition used for treatment of anaerobic infection or protozoan infection.

The present invention relates to thio semicarbazone and semicarbazone inhibitors of cysteine proteases and methods of using such compounds to prevent and treat protozoan infections such as trypanosomiasis, malaria and leishmaniasis. The compounds also find use in inhibiting cysteine proteases associated with carcinogenesis, including cathepsins B and L.

The present disclosure is directed to interleukin-10 (IL-10) peptides and isolated antibodies that specifically bind to the IL-10 peptides. The IL-10 peptides and the isolated antibodies may be administered alone or as an animal feed additive to treat gastrointestinal protozoan infection in animals.

The invention relates to a stable pharmaceutical salt of L-aonitrate phosphate ester, its preparation method and application. The related strong acid salt of the L-aonitrate phosphate ester is shown by the formula I and is mainly used in treating anaerobic infection or protozoan infection.

Polypeptide and polynucleotide vaccines effective to treat or prevent infection of a mammal, such as a dog, a cat, or a human, by a protozoan. Methods of treatment and prevention are also provided, including therapeutic administration of the vaccine to an infected mammal to prevent progression of infection to a chronic debilitating disease state. Preferred embodiments of the polynucleotide vaccine contain nucleotide coding regions that encode polypeptides that are surface-associated or secreted by T. cruzi. Optionally the efficacy of the polynucleotide vaccine is increased by inclusion of a nucleotide coding region encoding a cytokine. Preferred embodiments of the polypeptide vaccine include immunogenic peptides that contain membrane transducing sequences that allow the polypeptides to translocate across a mammalian cell membrane.

The present invention provides compositions and methods for inhibiting protozoan growth comprising a synergistic combination of lipid synthesis inhibitors. In addition, the invention provides compositions and methods that are useful for the treatment of protozoan infections and the identification of potential new drugs for the treatment of protozoan infections.

The invention relates to a nitroimidazole derivative used in therapy, and provides a compound of formula (I) or its pharmaceutical salt: wherein R1 can be taken as saturated or unsaturated straight chain, branched chain alkyl or cyclic alkyl with the carbon number from 1 to 10, R2, R3 can represent alkyl or form rings, the ring can be the ring from three-membered ring to ten-membered ring, the ring is capable of connecting with one or a plurality of same or different substituents; the rings formed by R2, R3 are capable of forming heterocycles, the heterocycle is capable of containing 0 to 5 same or different heteroatom substitutions; X expresses ion or group with negative electricity, which concretely can be halogen negative ion, organic acid radical, inorganic acid radical. According to the invention, the nitroimidazole derivative is used for treating the diseases caused by anaerobic infection or protozoans infection.

The invention provides compounds of Formula (I), and their use in methods for treating or preventing a protozoan infection in a subject using a compound of Formula (I). The invention also provides the use of a compound of Formula (I) in the manufacture of a medicament for the treatment of a protozoan infection in a subject. The invention further provides a medical device when used in a method of treating or preventing a protozoan infection in a subject and to a medical device comprising the composition of the invention.

The invention discloses a colloidal gold test strip for testing toxoplasma gondii antibodies.The colloidal gold test strip comprises a bottom board, a sample pad, a gold-labeled protein-enveloped conjugate pad, a nitrocellulose membrane containing a detection line T and a quality control line C and an absorbent pad, wherein the sample pad, the conjugate pad, the nitrocellulose membrane and the absorbent pad are disposed on the bottom board.Experiments prove that the colloidal gold test strip is capable of detecting serum antibodies of toxoplasma gondii in animal bodies and achieving differentiating diagnosis of protozoan infection of animals conveniently, cost saving and simple and convenient to operate and is applicable to the animals such as pigs, dogs and cats.

Targeting agents such as transferrin and transcobalamin can be conjugated with anti-protozoan drugs for the treatment of protozoan infections. Any suitable anti-protozoan drug can be used, preferably the drug is selected from the group consisting of apoptosis inducing compounds, cytotoxic antibiotics, alkalating agents, plant toxins, and bacterial mutant toxins. The targeting agent is preferably coupled to the antiprotozoan drug by means of glutaraldehyde.

This invention involves Ornidazole precursor drug and its preparation and use. Ornidazole precursor drugs is obtained by through chemical modification to its structure of the hydroxyl group, can be used in medicinal combination, can be used to treat anaerobic bacteria or protozoan infection diseases.

The invention relates to an amino acid salt of S-Ornidazole phosphate, especially its monoamino acid salt. With a structural formula as shown in general formula I, the amino acid salt of S-Ornidazole phosphate is mainly used for treating anaerobic infections or protozoan infections.

This invention provides compounds of formula (I) and salts thereof, which have activity as inhibitors of N-myristoyl transferase (NMT). The invention also relates to uses of such compounds as medicaments, in particular in the treatment of a disease or disorder in which inhibition of N-myristoyl transferase provides a therapeutic or prophylactic effect, including protozoan infections (such as malaria and leishmaniasis), viral infections (such as human rhinovirus and HIV), and hyperproliferative disorders (such as B-cell lymphoma).

The invention provides 3-amino-3-arylpropionic acid with the structure shown in the formula I in the specification, wherein R1 is substituted or non-substituted phenyl, substituted or non-substituted bicyclo or tricycloaryl or substituted or non-substituted monocyclo, bicyclo or tricycloaryl containing at least an N, O or S atom. The invention also provides a preparation method of 3-amino-3-arylpropionic acid. The unnatural amino acid 3-amino-3-arylpropionic acid can synthesize a series of polypeptide compounds with other amino acids. The polypeptide compounds have certain inhibitory activity against histone deacetylase (HDAC), are possibly used for preventing or treating diabetes, diabetes complications, acute promyelocytic leukemia (APL), inflammatory diseases, organ transplantation rejection, protozoan infection, autoimmune diseases or tumors, etc and have certain medicinal value. The preparation method has the beneficial effects of easily-obtained raw materials, simpleness, convenient operation and higher yield.

This invention relates to bis-flavonoid compounds of formulaFlavonoid-Linker-Y-Linker-Flavonoid,their synthesis and use for inhibiting multidrug resistance in chemotherapy and protozoan infection.

This invention relates to compounds that are analogues of coformycin, pharmaceutical compositions containing the compounds, and methods of using the compounds for treating protozoan parasite infections, especially malaria.