68 results about "Plasmodium falciparum" patented technology

In this application is described the expression and purification of a recombinant Plasmodium falciparum (3D7) AMA-1 ectodomain. The method of the present invention produces a highly purified protein which retains folding and disulfide bridging of the native molecule. The recombinant AMA-1 is useful as a diagnostic reagent, for use in antibody production, and as a vaccine.

The present invention relates to novel geldanamycin derivatives which have antitumor and antiparasitic properties. The geldanamycin derivatives disclosed herein have antitumor properties in humans due to their interaction with human heat shock protein 90 (hsp90). The human parasites Plasmodium falciparum, Trypanosoma Cruzi, and Leishmania donovani are lethally susceptible to exposure to geldanamycin via complexation of geldanamycin with their homologs (Pfhsp90, hsp83, and hsp90, respectively) of the human hsp90. The geldanamycin derivatives disclosed herein also interact with these parasitic hsp90 homologs so as to have antiparasitic properties.

The invention relates to a preparation method of HRPII protein monoclonal antibody of plasmodium falciparum. The preparation method comprises the following steps of: adopting HRPII protein of plasmodium falciparum as target antigen and respectively analyzing and selecting two dominant antigen epitopes of A and B; respectively repeating the two dominant antigen epitopes of A and B, then continuously connecting four glycine and forming recombinant protein C; adopting most securest code of escherichia coli and converting the amino acid sequence of the recombinant protein C into corresponding nucleotide sequence; carrying out chemical synthesis to the former step to obtain the nucleotide sequence, and respectively adding enzyme cutting sites BamHI and EcoRI at the upstream and downstream thereof; inserting nucleotide fragment obtained by the former step into expression carrier PET-28a(+), constructing recombinant protein C expression carrier and inducing to express the recombinant proteinC in the escherichia coli BL21 (DE3); carrying out ultrasonic bacteria breaking and low-temperature centrifugation, then taking supernatant of the solution, affining a chromatographic column by nickel-agarose, eluting and obtaining purified recombinant protein C; after immunizing Balb/c mouse with the recombinant protein C for a plurality of times, taking and fusing spleen cells with sp2/0 myelomacells, and obtaining six hybridoma cell lines by multiple rounds of screening; and purifying monoclonal antibody, respectively marking horse radish peroxidase and prorating matching and combination of optimum monoclonal antibody by ELISA orthogonal experiment.

Methods of purifying MSP-1 from a variety of source materials including from the milk of transgenic mammals.

The invention provides a silver nano-cluster fluorescent probe based on double-stranded DNA protection and application of the same to preparation of a drug used for detecting Plasmodium falciparum lactate dehydrogenase, belonging to the technical field of fluorescent probes. DNA used in the invention is of a double strand structure, wherein one strand is composed of a complementary strand DNA and a template strand DNA, and the other strand is composed of a complementary strand DNA and G base-rich DNA; the template strand DNA is a protective group for synthesis of a silver nano-cluster and can be coordinated with the surface of the silver nano-cluster to prevent further expansion of the silver nano-cluster; the G base-rich DNA improves the fluorescence emission intensity of the silver nano-cluster by approaching the silver nano-cluster; the complementary strand DNA has a length of 10 to 30 bases and is rich in A (adenine) and T (thymine) bases; the template strand DNA has a length of 10 to 20 bases and is rich in C (cytosine) bases; and the G base-rich DNA has a length of 10 to 25 bases and is rich in G bases. A detection method provided by the invention is fast in detection speed, simple to operate, simple in system, stable in signal, high in sensitivity and free of any pretreatment and does not need any complex detection apparatuses.

The invention provides the use of a compound for the manufacture of a medicament for the treatment of pain, wherein the compound is a compound of the formula (VI):

or a salt, solvate, tautomer or N-oxide thereof;

wherein the bicyclic group:

is selected from the structures C1, C5 and C6:

wherein n, R¹, R^2a, R³, R^4a, R⁸ and R¹⁰ are as defined in the claims.

The invention also provides the use of a compound of the formula (VI) for the manufacture of a medicament for the prophylaxis or treatment of a fungal, protozoal, viral or parasitic disease state or condition (other than a disease state or condition due to Plasmodium falciparum) or for use in the prophylaxis or treatment of Ewing's sarcoma, atherosclerosis or lupus erythematosus.

Uric acid in mammalian subjects is reduced and excretion of uric acid is increased by administering a compound of Formula I. The uric acid-lowering effects of the compounds of this invention are used to treat or prevent a variety of conditions including gout, hyperuricemia, elevated levels of uric acid that do not meet the levels customarily justifying a diagnosis of hyperuricemia, renal dysfunction, kidney stones, cardiovascular disease, risk for developing cardiovascular disease, tumor-lysis syndrome, cognitive impairment, early-onset essential hypertension, and Plasmodium falciparum-induced inflammation. In Formula 1, x is 1 or 2: y is O, 1, 2 or 3; and R¹ is selected from the group consisting of hydrogen, alkyl having 1 or 2 carbon atoms, hydroxy, alkoxy having 1 or 2 carbon atoms, fluoro, chloro, bromo, and amino. A is phenyl unsubstituted or substituted by one, two or three groups selected from the group consisting of halo, alkyl having 1 or 2 carbon atoms, perfluoromethyL alkoxy having 1 or 2 carbon atoms, and perfluoromethoxy; or cycloalkyl having from 3 to 6 ring atoms wherein the cycloalky! is unsubstituted or one one two ring carbons are independently mono-substituted by methyl or ethyl; or a 5 or 6 membered heleraromatic ring having 1 or 2 ring heteroatoms selected from N, S and O and the heteroaromatic ring is covalently bound to the remainder of the compound by a ring carbon.

In this application is described the expression and purification of a recombinant Plasmodium falciparum (FVO) MSP-1₄₂. The method of the present invention produces a highly purified protein that retains folding and disulfide bridging of the native molecule. The recombinant MSP-1₄₂ is useful as a diagnostic reagent, for use in antibody production, and as a vaccine.

The invention discloses a preparation method of plasmodium pf/pan detecting test paper. The preparation method comprises the following steps of: separately performing metal spraying to a glass cellulose membrane by means of immunogold marked by a plasmodium falciparum lactic dehydrogenase monoclonal antibody and a plasmodium lactic dehydrogenase monoclonal antibody to obtain a pf gold pad and a pan gold pad; separately marking lines on a polyvinyl chloride bottom plate adhered with a nitrocellulose membrane by a plasmodium falciparum lactic dehydrogenase monoclonal antibody detection line coating liquid, a plasmodium lactic dehydrogenase monoclonal antibody detection line coating liquid and a control line coating liquid to obtain the polyvinyl chloride bottom plate with the dotted membrane; and assembling a sample pad, the gold pads, the polyvinyl chloride bottom plate with the dotted membrane and water absorbing paper together and performing cutting to obtain the detecting test paper. The detecting test paper obtained by the method disclosed by the invention can judge whether a blood sample contains plasmodium pf/pan or not by manual operation and reading by naked eyes by virtue of an immune directed flow chromatographic technique, is fast to diagnose and accurate in result, and does not damage the body of a testee.

The present invention relates generally to a method of eliciting or otherwise inducing an effective immune response to a micro-organism and compositions for use therein. More particularly, the present invention relates to a method of inducing an immune response to a parasite utilising an immunogenic composition comprising a glycosylphosphatidylinositol (referred to herein as “GPI”) inositolglycan domain or its derivatives. Even more particularly, the present invention contemplates an immunogenic composition comprising the Plasmodium falciparum GPI inositolglycan domain or its derivatives. The present invention is useful, inter alia, as a prophylactic and/or therapeutic treatment for disease conditions such as, for example, infection by parasites and in particular infection by Plasmodium species.

In this application is the expression and purification of a recombinant Plasmodium falciparum (3D7) MSP-1₄₂. The method of the present invention produces a highly purified protein which retains folding and disulfide bridging of the native molecule. The recombinant MSP-1₄₂ is useful as a diagnostic reagent, for use in antibody production, and as a vaccine.

The present invention discloses a plasmodium gene diagnosis primer. The primer a loop-mediated isothermal amplification (LAMP) primer for detecting/identifying whether specific plasmodium and three species of plasmodium are present in samples. A use of the primer set can simultaneously or separately detect or identify infections of plasmodium and/or one or more of plasmodium falciparum, plasmodiumvivax and plasmodium ovale, gains precious time for diagnosis and treatment of malaria in China, and provides helps for preventing, controlling and eliminating prevalence of the malaria.

The invention discloses a method for using nucleotide DNA fragments as molecular markers for identification of five important pathogens, i.e., Yersinia pestis, Plasmodium falciparum, Vibrio cholera, Leishmania donovani and Trypanosoma brucei. The nucleotide DNA fragments can be used as effective genetic markers for rapid and accurate identification of pathogens, are beneficial for accurate and rapid discrimination of populations migrated from an original infection site and provide bases for molecular epidemiological study of pathogens.

The invention provides a fluorescent latex immunochromatography detection reagent for detecting falciparum malaria and a preparation method thereof. The fluorescent latex immunochromatography detection reagent comprises a sample mat, a combining mat, a reaction film and a water absorption mat. The combining mat is coated with an anti-HRP-2 monoclonal antibody marked by fluorescent latex and anti-rabbit IgG, a detecting line and a quality control line are arranged on the reaction film, the detecting line is coated with an anti-HRP-2 monoclonal antibody, and the quality control line is coated with rabbit IgG. The fluorescent latex immunochromatography detection reagent for detecting falciparum malaria can fast detect plasmodium falciparum, and is fast to operate, low in cost and suitable for clinical use and field use.

Uric acid in mammalian subjects is reduced and excretion of uric acid is increased by administering a compound of Formula (I) or its pharmaceutically acceptable salts. The uric acid-lowering effects of the compounds of this invention are used to treat or prevent a variety of conditions including gout, hyperuricemia, elevated levels of uric acid that do not meet the levels customarily justifying a diagnosis of hyperuricemia, renal dysfunction, kidney stones, cardiovascular disease, risk for developing cardiovascular disease, tumor-lysis syndrome, cognitive impairment, early-onset essential hypertension, and Plasmodium falciparum-induced inflammation. R¹ is hydrogen or alkyl having from 1 to 3 carbon atoms. R² is alkyl having from 1 to 3 carbon atoms, alkoxy having from 1 to 3 carbon atoms, hydroxy, nitro, halo, thio, alkylthio, or cyano. R³ and R⁴ are each independently hydrogen, methyl, ethyl, perfluoromethyl, methoxy, ethoxy, perfluoromethoxy, halo, hydroxy, nitro, or amino.

The invention discloses a fused polycyclic indoline compound and a preparation method thereof as well as a pharmaceutical composition and application. The compound provided by the invention has an obvious inhibiting effect on tumor cells Kyse-450, MDA-MB-231 and SKGT-4 and has remarkable bioactivity for plasmodium falciparum dd2 having drug resistance for chloroquine; meanwhile, the preparation method disclosed by the invention has the advantages of high reaction yield, short synthesis steps, wide range of suitable substituent group and simple operation, and is expected to realize an industrial application prospect. (The formula is shown in the description).

The invention relates to a rapid and sensitive plasmodium falciparum detection method. The detection method integrates two powerful molecular biology techniques of a polymerase chain reaction PCR and a microarray, PCR hybridized probes are directly fixed on a hybridization cabin in the microarray and are on a same chip with a PCR reaction chamber; the detection method includes the steps of extracting a blood sample DNA liquid, carrying out PCR amplification, hybridizing, cleaning, and reading and discriminating a result. The method can quickly and sensitively detect plasmodium falciparum, can greatly improve the detection efficiency of front line inspection and quarantine personnel of import and export ports, not only can reduce the workload, but also furthest solves a positive detection missing problem possibly existing in a traditional detection method, so as to furthest prevent generation of plasmodium epidemic situation.

The present invention relates to construction and application of thermostable yeast engineering strain for L-lactic acid production. The invention provides an L-lactic acid production yeast engineering strain. The yeast engineering strain is Kluyveromyces marxianus engineering stain prepared by recombinant expression of Plasmodium falciparum L-lactate dehydrogenase gene PfLDH and/or Bacillus megaterium L-lactate dehydrogenase gene BmLDH, for example, the deposit number of the engineering strain is CGMCC No.16192. The invention also provides a method for constructing the engineering strain, which is used in L-lactic acid production and method for production of L-actic acid. The engineering strain of the invention can efficiently co-utilize glucose and xylose for fermentation at relatively high temperature (for example, 42 DEG C), and can rapidly produce large quantities of high optical purity L-lactic acid, can also be quickly and efficiently used as a representative of corncob lignocellulose fermentation production of L-lactic acid, is the first lignocellulosic substances can be used to produce lactic acid engineering yeast.

A stable protein ionic liquid, comprising an anti-hemoglobin cation/anion pair. The anti-hemoglobin cation/anion pair may be an anionic polymer of poly(ethylene glycol) 4-nonylphenyl 3-sulfopropyl ether. The anti-hemoglobin cation/anion pair may further comprise a cationized anti-hemoglobin antibody, single-chain antibodies from camelids, antibody fragments, polyclonal Anti-horse spleen ferritin antibodies, monoclonal Anti-Flag antibodies, monoclonal Anti-HRP2 to Plasmodium falciparum, polyclonal Anti-neuropeptide Y, polyclonal Anti-human troponin, isotypes of antibodies, or combinations of multiple antibodies.