49 results about "Resistant virus" patented technology

The invention relates to a wild jujube seed extract which is prepared by the following method: crushing wild jujube seeds, screening, soaking with ethanol to extract, after removing alcohol, adding water, uniformly stirring, leaching with aqueous n-butylalcohol, lastly concentrating and airing. The wild jujube seed extract of the invention can be prepared into oral liquid, granules, injection or freeze-drying powder injection through routine techniques. The wild jujube seed extract can be used prepare medicament compositions preventing poultry mycoplasma, Escherichia coli, brusal disease virus, avian H9 influenza virus disease, makes up for loss caused by poor preventing effect of existing bacterin in our country, substitutes bacteriophage to prevent and treat poultry resistant virus disease to control prevalence of infectious disease and solve a problem of bacteriophage residue in foods, thus guaranteeing food security and promoting export competitive ability of animal products.

The invention relates to the field of nucleic acid amplification, particularly to quality control materials for use in viral RNA assays. It specifically relates to the construction of a recombinant Pestivirus by the identification of a region in the 3′NTR of the viral RNA genome where additional sequence elements can be stably inserted. Chimeric Pestivirus with sequence insertions in the 3′ nontranslated region (3′NTR) of the viral RNA genome were stable in replication and capable of forming infectious, RNase resistant virus particles. This chimeric Pestivirus with a 3′NTR insertion can be utilized as a quality control material in analytical assays for RNA targets, including external, internal controls, quantitative standards in PCR and NAT nucleic acid assays.

The present invention provides methods for lowering a viral load of a virus resistant to an antiviral drug by inducing cytotoxic T lymphocytes (CTL) to recognize a predetermined mutated epitope within a viral protein of the drug-resistant virus. CTLs are induced by immunizing a host with a peptide comprising the predetermined mutation. The immunostimulating peptide may be further improved by epitope-enhancement for inducing specific CTLs. The antiviral protection against drug-resistant virus shown by compositions of the present invention and mediated by human HLA-restricted CTL has not been previously achieved.

The present invention includes a group of novel compounds that are demonstrated to potently and selectively inhibit HIV integrase (IN) activity in vitro and to potently inhibit HIV replication in live, cultured cells at non-toxic concentrations. The novel compounds disclosed include 2,3-di(3,4-dihydroxy-dihydroxydihydrocinnamoyl)-L-tartaric acid, 2,3-di-(3,4-dihydroxybenzoyl)-L-tartaric acid, 2,3-di-(3,4-dihydroxyphenylacetyl)-L-tartaric acid, 2,3-di-(3,4,5-trihydroxybenzoyl-L-tartaric acid, 2,3-dicaffeoyldiamidopropionic acid, 1,2,-dicaffeoyl-L-glyceric acid, bis,-3,4-dicaffeoyldiamidobenzoic acid, di-3,4-dihydroxybenzylidene succinic acid, di-3,4-dihydrodihydroxybenzylidine succinic acid, 2,3-dicaffeoyl-L-serine, bis-dicaffeoyl-L-isoserine and 1,4-dicaffeoyl-L-lysine. Tests of integrase inhibitors with 2′,3′-dideoxycytidine, zidovudine and nelfinavir (protease inhibitor) indicated a potent synergy against reverse transcriptase inhibitor resistant virus. The potential benefit from the addition of integrase inhibitors to combination drug therapies is significant.

The present invention provides small molecule compounds of bisheterocycle in tandem having the structural formula of P1-P2, and the use thereof as well as a composition containing the compounds, each of P1 and P2 is an unsaturated 5-member heterocyclic ring having one or two heteroatoms. This compound may effectively inhibit the replication of influenza virus, the DNA replication of hepatitis B virus (HBV), and the formation of HBsAg and HBeAg. These compounds can be used for the preparation of a medicament for viral diseases, and may overcome the limitations of the known nucleosides drugs, including cytotoxicity, the requirement of other drugs having different structures for against the drug-resistant virus variants induced by long-term therapy. The structure of the compounds according to the invention is relatively simple and easy to be prepared.

A novel single-cell-level phenotypic assay is described, which can simultaneously analyze HIV-1 drug susceptibility and intrinsic replication capacity. This allows quantitative dissection of the functions of antiretroviral drugs into suppression of viral replication and selection of resistant viruses with diminished replication capacities. The disclosed assay provides a tool for the rational evaluation of treatment decisions for patients failing antiretroviral therapy and is expected to be an important part in clinical management of HIV.

Viruses, and particularly RNA viruses, have high mutation rates. Hence, antiviral agents that have been developed to date targeting protease or reverse transcriptase of viruses have quickly lost their effectiveness and resistant viruses have emerged. Also, in recent years, viral diseases caused by various new viruses such as SARS, avian influenza, and the hepatitis C have become social menaces. Therefore, the development of a novel antiviral agent that can cope with a virus resistant to an existing drug or a new virus and has a wide range of applications has been demanded. The present invention provides a novel anti-RNA viral agent and a method for use thereof. The present invention further provides an anti-RNA viral agent that is also effective against a new virus or a drug-resistant virus, and a method for use thereof.

The invention discloses a dry heat sterilizing method of cucurbitaceae stock seeds. The method comprises the steps of treating the harvested cucurbitaceae stock seeds by a dry heat sterilizer in three stages, wherein the temperature of the first stage is 35 DEG C, the temperature of the second stage is 50 DEG C, and the temperature of the third stage is 72 DEG C. The dry heat sterilizing method of cucurbitaceae stock seeds can effectively kill pathogenic bacteria, especially, high-temperature resistant viruses and the like without measures such as chemicals utilization or seed soaking for changing the seed status, the operation is simple, and therefore, the method is suitable for large-scale seed treatment.

The invention discloses a monoclonal antibody hybridoma cell line for secreting southern rice black-streaked dwarf resistant viruses and monoclonal antibody application thereof. Polypeptide of 12 amino acids at the C end of a capsid protein of southern rice black-streaked dwarf viruses (SRBSDVs) coupled with bovine serum albumin is used as an antigen to immune a BALB/c mouse, one hybridoma cell line 3F1 capable of performing stable passage and secreting an SRBSDV monoclonal antibody is obtained through cell fusion, screening and cloning, and the preservation number of the hybridoma cell line 3F1 is China general microbiological culture collection center number (CGMCCNo.) 5535. Monoclonal antibody ascites indirect enzyme-linked immunosorbent assay (ELISA) valence of the 3F1 reaches above 10-6, an antibody type and a subclass are immunoglobulin G (IgG1) and a kappa chain, the monoclonal antibody of the hybridoma cell line has specific reaction with a capsid protein subunit of SRBSDV56kD, and a method for detecting rice planthoppers and dot-ELISA of SRBSDV in rice is built by using the monoclonal antibody of the 3F1. When a single-head white backed rice planthopper is diluted to 6400mul, the viruses can still be detected when diseased leaves are diluted according to 1:320 times (w/v, g/mL). The preparation of the SRBSDV resistant monoclonal antibody and the building of the detection method provide technology and material supports for diagnosis, prediction and scientific prevention and control of the rice viruses.

Disclosed are an Schisandrae fructus extract for inhibition or prevention of influenza and its application, wherein the Schisandrae fructus extract is obtained by water, methanol, or ethanol extraction process and the extract comprises compounds such as schisandrone, benzoylgomisin P, wulignan A1, epigomisin O, epiwulignan A1, and tigloylgomisin P. The extracts and purified compounds of Schisandrae fructus has anti-influenza virus H1N1 and H1N1-TR (a Tamiflu drug resistant virus strain) activities, therefore the extracts and the purified compounds of Schisandrae fructus can be applied as an inhitibory agent of a pharmaceutical composition for treatment or prevention agent for influenza infection.

The present invention relate4s to an aminoglycoside antibiotic which belongs to the application technology filed of aminoglycoside antibiotic. The present invention provides the derivative of the structure of 2'-NH ₂ -3 ', 4'-deoxy-3'-N demethylase 1-N acylation as well as the application of the derivative in the preparation of medicinal combination in the treatment of drug-resistant virus infections.

A therapeutic face mask apparatus for wearers with resistant respiratory viruses, is connected to a heat gun that provides adjustable heated and humidified air for inhalation. The heat gun heats ambient air that is breathed in through the face mask during normal breathing, which is worn over the nose and mouth of a person. A temperature gauge monitors temperature for future adjustment of the amount of heat generating current to raise the heat to a predetermined temperature to deactivate resistant viruses in compromised upper and/or lower respiratory systems of the wearer. The air in the chamber is heated for inhalation by a resistive element in the heat gun. The temperature of the resistive material (and by extension the warm air generated), is regulated/adjusted by increasing or decreasing the current output settings on the power source, so that heated and pressured air is produced.

The invention belongs to the technical field of medicine, and discloses a lotion and use thereof, and the lotion comprises a chitosan polymer, a hyaluronic acid, a pH regulator, a cosolvent and a transdermal enhancer; the lotion has good stability, and the study shows that the lotion is good in antibacterial effect, wide in antibacterial spectrum (propionibacterium acnes and the like resisting), wide in resistant virus (including high-risk HPV (human papilloma virus), low risk HPV, herpes virus), physical antimicrobial, free of drug resistance, biodegradable, safe, environmentally friendly, and long in drug efficacy duration time, and has the nourishing, lubricating, whitening, spot fading, repairing, scar formation inhibiting, and anti-adhesion effects on skin or mucosal tissues. The lotion is safe and non-toxic, and has the effects of resisting bacteria, repairing, moisturizing, and full recovery of vaginal or skin micro ecological balance.

Biopolymer compositions comprising antimicrobial peptides (AMPs) for treating infections such as bacterial infections, viral infections, fungal infections, and parasitic infections. The compositions herein may also be used for treating infections associated with antibiotic-resistant bacteria, antifungal-resistant fungi, antiviral-resistant viruses, or for treating biological warfare agents (BWAs) such as Bacillus anthracis and Yersenia pestis. The present invention also provides methods of synthesis of said biopolymer compositions, wherein AMP biopolymers can be synthesized as an artificially engineered protein by genetically fusing an AMP; a protein that behaves similarly to polymer tethers; and a protein as a modifiable material platform that can transform to self-assembled nanoparticles, self-standing films, or adhesives to easily attach tethered AMPs onto any biomaterial surface for various clinical applications.

An oseltamivir analogue and nanoparticles having the analogue bound thereto, of the present invention, strongly bind to oseltamivir-resistant influenza virus, and thus, the use of the same can allow detection of oseltamivir-resistant influenza viruses quickly and conveniently with the naked eye. Therefore, the present invention can be favorably utilized in promptly establishing a therapeutic schedule for a patient infected with influenza viruses.

The invention determines 1'-acetoxychavicol acetate and derivative thereof with a new function of inhibiting the reproduction of HIV-1 (human immunodeficiency virus-1) drug-resistant virus. The 1'-acetoxychavicol acetate and the derivative thereof can effectively inhibit the reproduction of the HIV-1 drug-resistant virus generated by an HIV-1 fusion inhibitor and a protease inhibitor under low consistency, and does not display cytotoxicity on host cells. Therefore, the 1'-acetoxychavicol acetate and the derivative thereof have potential application prospect in treating AIDS patients with drug resistance.

The invention relates to a method for administrating preparations containing oseltamivir guanidyl carboxylate analogues and/or ethyl esters thereof. Administration is carried out through inhalation. The method can be used for treating cold caused by influenza viruses. By adopting the administration method provided by the invention, not only can dependence on the single variety of drugs such as oseltamivir, zanamivir and peramivir be reduced and new drug resistant virus strains generated by using the single variety in quantity be avoided but also the method which is favorable for greatly improving the bioavailability compared with oral administration or intravenous drip is provided for oseltamivir guanidyl carboxylate analogues or ethyl esters thereof; more importantly, the method which has the advantages of small drug dose, less side effects and high effect taking speed is provided.

The invention relates to a region of the HIV-I gp41 protein that contains, at least in part, an epitope that allows potent neutralization of resistant virus particles. This site is present in the C-terminal heptad repeat region of gp41 (HR2), and adjacent to, but distinct from the MPER. Vaccines containing this region as well as monoclonal antibodies which specifically bind to this region and neutralize an HIV-I primary isolate are also provided as is a method for stimulating the formation of antibodies that neutralize infection by an HIV isolate.