310 results about "Animal testing" patented technology

Compounds are provided that act as potent antagonists of the CCR2 receptor. Animal testing demonstrates that these compounds are useful for treating inflammation, a hallmark disease for CCR2. The compounds are generally aryl sulfonamide derivatives and are useful in pharmaceutical compositions, methods for the treatment of CCR2-mediated diseases, and as controls in assays for the identification of CCR2 antagonists.

In one aspect, the present invention provides a housing system for conducting high throughput animal experiments. The housing system includes a home cage, at least one rotatable turnstile enclosed by housing to form two or more isolation chambers, a means for animal identification, and one or more action stations functionally coupled to one or more isolation chambers. The turnstile includes a plurality of one or more separation members rotatable about a vertical axis, each isolation chamber bounded by one or more separation members. The action stations contain one or more devices facilitating completion of at least one animal-directed or experimentor-initiated action. In a preferred embodiment, the home cage is sufficiently sized to house a plurality of small animals, such as mice. Tunnel passageways may be connected to the home cage, including one or more tunnel passageways containing a rotatable turnstile. Additional embodiments include rotatable turnstiles, rotatable turnstile assemblies, and methods of conducting high throughput animal experiments using the devices and systems described herein.

The invention discloses a feed additive composite for preventing weaned pigs from diarrhea. The feed additive composite comprises the following substances by mass: 30-40 parts of montmorillonite, 30-40 parts of organic acids and 20-30 parts of oligosaccharides. The feed additive composite has the following beneficial effects: the montmorillonite has high adsorbability and can serve as the sustained-release carrier of the oligosaccharides and acidulants in the digestive tracts of the animals, thus ensuring the oligosaccharides and acidulants to work in the whole intestinal tract, especially continuously playing roles in the hindgut; and the additive amount of the montmorillonite in the daily ration of the weaned pigs can be reduced through sterilization and bacteriostasis of the oligosaccharides and acidulants, thus avoiding the negative effects of the montmorillonite on palatability of the daily ration of the weaned pigs. The results of animal experiments show that the feed additive composite can effectively replace nano zinc oxide and part of feed antibiotics to be used in the daily ration of the weaned pigs, reduce the diarrhea rate of the weaned pigs and improve the survival rate and growth performance of the weaned pigs.

The invention discloses an O type foot and mouth disease virus-like particle and a preparation method of the O type foot and mouth disease virus-like particle and an application. The O type foot and mouth disease virus-like particle is formed by assembling structural protein VP0, VP1 and optimized OP3 structural proteins of O type foot and mouth disease virus, wherein the gene sequence of the VP1 is shown as SEQ ID NO.1; the gene sequence of the VP0 is shown as SEQ ID NO.2; the gene sequence of the optimized VP3 is shown as SEQ ID NO.3. The invention tries to perform artificially missing on a part of section of the structural protein VP3 of O type foot and mouth disease virus; the result shows that the protein expression amount of the VP3 gene after the artificial missing is improved by 20% in comparison to that before mutation; the assembling efficiency of the virus-like particle is also improved by 15%; moreover, the animal test result shows that the immunogenicity thereof is good and free from significant difference with VLPs obtained through unmissed VP3 assembling. The invention provides a new technical manner for the research of the foot and mouth disease vaccine.

The invention provides a preparation method of a duramater/spinal dural transplanting substitute which is obtained by repeated freezing and thawing of dural tissue, rolling and cracking of cells, crosslinking fixed protection, accellular antigen extraction, dense surface fibrosis modification, packaging and sterilization, and has the advantages of simple method, wide raw material sources, cheap raw materials, and low cost. The prepared dural substitute completely removes components of cells and other antigen components simultaneously when protecting dural tissue natural structure and properties, is good in biocompatibility, free of immune rejection, safe and reliable, good in mechanical performance, and easy in clinical operation, can meet the needs of defect repair, has the function of promoting tissue regeneration as a loose surface is beneficial to the tissue fluid adsorption, active factor enrichment, and growth of blood vessels and cells, and has the advantages of rapidness in fusion with a host, biodegradable absorption, and good repair effect. The animal test shows that the defect can be completely repaired without brain or spinal fluid leakage, or adhesion with brain tissue, and significant rejection is not found.

The invention belongs to the field of biotechnology, and relates to a MntC recombinant protein of staphylococcus aureus (SA), a carrier comprising the recombinant protein, a host, a composition or a kit, application, preparation, fermentation and purification method of the protein. The MntC recombinant protein prepared by the method has strong immunogenicity, is safe and non-toxic, and is proved by animal tests to be able to effectively stimulate an organism to generate high efficient humoral immune response and good immune protection.

An automated feeding station for in-home testing away from unfamiliar laboratory settings test the acceptance of pet food by monitoring the reaction of the companion animals or pets in their comfortable in-home environment where the animals make their preferred choice of food without distractions caused by an unfamiliar environment. A pet owner scans appropriate food identifiers to verify the proper diet is being distributed into the appropriate food-receiving region(s). Once the food bowls are placed in appropriate food receiving regions within the feeding station, the testing system begins collecting data and transmits this data, preferably wirelessly, to the testing investigators. The preferred feeding station can measure: intake for the companion animal, information pertaining to the rate of food consumption, the animal's first approach to food, and the food first tasted by the animal. This information is provided via appropriate sensors and algorithms designed for this purpose within the system.

Disclosed is a method for detecting CYP450 enzymatic activity by means of micro-liver tissue incubation in vitro, which is characterized in that: a liver trace puncturing method used in clinic takes micro-liver tissues of 0.1 to 0.2g, or kills a mouse to take out the liver in an animal experiment, and builds a micro-liver tissue in vitro incubation system, then uses a one-probe medicine to perform the liquid phase chromatography tandem mass spectrometry for detecting probe substrates and concentration of corresponding metabolites, and obtains the activity of P450 enzyme according to metabolite ratios thereof. The method has the advantages of: 1. micro scale: only micro-liver tissues of 0.1 to 0.2g are needed for detecting cytochrome P450enzyme activity, and can be used for animal experiment and checking clinic micro-liver tissue liver drug enzyme activity; 2. time saving and convenience: costly ultracentrifugation equipment used in the conventional method is saved, costs and time for detection are greatly saved, and liver enzyme metabolic condition simulation is better; and 3. establishing indexes for evaluating the enzyme metabolic activity: metabolite ratios.

The invention provides a new strain FM 603 of bacillus coagulans, and the preservation number of the strain is CGMCC NO.10221. The strain can generate bacteriocin antibacterial substances and achieves antibacterial activity for Gram-positive pathogenic bacteria such as Listeria monocytogenes, staphylococcus aureus, methicillin-resistant staphylococcus aureus, clostridium perfringens and clostridium difficile. The molecular weight of bacteriocin is 4276.45 Da, the partial amino acid sequence is Ala-Gly-His-Dhb-Phe-Val-Dhb-Gly-Pro, and the bacteriocin is stable under treatment of heat, acid, and pepsase or trypsin and can be degraded easily by pronase to be inactivated. The invention further provides an FM603 fermentation product which can be used as a microbiological feed additive. Animal test results show that the fermentation product can increase the laying rate of laying hens, reduce the feed-egg ratio and improve egg quality; the feed intake and daily gain of piglets are increased, and the feed conversion ratio is reduced; the daily gain and the content of lysozyme in serum of broiler chickens are increased, and the feed conversion ratio and the death rate are reduced.

Relating to the medicine field, the invention discloses the use of acetagastrodine in preparing medicines to prevent and treat vascular dementia and Alzheimer disease. The invention also provides a medicinal composition for preventing and treating senile dementia and its capsule as well as sustained release agent. Animal tests show that: acetagastrodine can substantially enhance the learning and memory abilities of rats with vascular dementia, reduce the activity of AchE in brains, enhance the vitality of ChAT in brains, and remarkably reduce Glu content; acetagastrodine has significant protective effect on damaged PC12 cells caused by H2O2 by enhancing the vitality of SOD and total ATP enzyme in PC12 cells and reducing the content of MDA and LD; acetagastrodine can substantially enhance the learning and memorizing abilities of AD model rats, enhance the CAT content in brains of the model rats, reduce the MAO vitality and simultaneously prevent the decrease of neurotransmitters. Acetagastrodine is better than gastrodin in terms of the treatment effects on VD and AD, and enjoys good clinical application prospect.

The invention discloses a production method of a feed additive 'Acremonium terricola culture'. The production method has the beneficial effects that by researching growth characteristics of Acremonium terricola strains and improving a production process of the Acremonium terricola culture, the production period of the Acremonium terricola culture is shortened from original 11-15 days to 5 days, the production cost of the Acremonium terricola culture is substantially lowered, and the production method has an important significance to the market promotion of the high-end feed additive; meanwhile, the energy loss of water, gas and electricity in the production process is greatly reduced. According to the production method, the production process of the Acremonium terricola culture mainly comprises the steps of 'liquid strain fermentation' and 'solid fermentation'. According to an animal test result, by utilizing the feed additive, the immunities of animals are improved, the feed conversion ratio is lowered, and the meat quality is improved. The production method has the advantages of low cost, short production period, controllability in control, good application effect and the like.

The invention relates to a vaccine adjuvant, in particular to the application of compound zinc hydroxide in the aspect of vaccine adjuvant preparations and further the application in the aspect of VAOTA adjuvant preparation.s The zinc hydroxide has a chemical formula of Zn(OH)2 and a chemical formula weight of 99.4046 Dalton. The zinc hydroxide working as an adjuvant is jointly applied with vaccine, so as to effectively strengthen body fluid immune response of the vaccine, and the immune strength effect is superior to that of aluminum adjuvant. In addition, according to the animal experiment result, both the sensitization and the safety of zinc hydroxide are superior to aluminum adjuvant.

The invention provides O-type aftosa synthetic peptide vaccine, and in particular relates to polypeptide or polypeptide polymer thereof used in the vaccine as well as the vaccine containing the polypeptide or the polypeptide polymer thereof and a preparation method thereof. The polypeptide has amino acid sequences shown in SEQ ID No.1, SEQ ID No.2 and SEQ ID No.3. The O-type aftosa synthetic peptide vaccine carries out chemical synthesis of potential antigen site peptide segments by carrying out sequencing of domestic aftosa epidemic strains to study the variation of the main antigen sites ofaftosa and combining with computer assistant to carry out antigen site analytical prediction. Candidate polypeptide antigens are screened out by carrying out large numbers of animal experiments and aftosa virus antigen sites are optimized according to the screening result; and T cell epitope and B cell epitope are effectively combined to improve the immune effects of the polypeptide antigens. TheO-type aftosa synthetic peptide vaccine can effectively cope with the antigen variation of aftosa virus and has ideal biosafety and easy large-scale synthesis, thereby having a good application prospect.

The invention relates to an irinotecan hydrochloride injection consisting of irinotecan hydrochloride (15-25g/L), sorbierite (17.5-22.5g/L), and the balance of phosphoric acid and injection water, wherein the phosphoric acid adjusts the pH of the injection to 3.0-3.8. The invention also relates to a preparation method of the irinotecan hydrochloride injection. Compared with the prior art, the irinotecan hydrochloride injection disclosed by the invention has the following beneficial effects: (1) the untoward effect is reduced; as shown in an animal test, the irinotecan hydrochloride injection disclosed by the invention can greatly reduce the untoward effect of delayed-onset diarrhea caused by irinotecan, which has an active promotion effect on the drug dependency and treatment effect of cancer patients; (2) the stability is high, as shown in an acceleration test, the character, acidity, solution clarity and color, insoluble particles, visible foreign matters, moisture, related substance and content of the irinotecan hydrochloride injection meet the regulations; and (3) the preparation method is simple and is favorable to the industrial mass production.

The invention belongs to the field of animal experiment instruments and particularly relates to a novel retractor of animals such as rabbits and mice. The retractor comprises an operation table plate (10). Column feet (12) are arranged at the bottom of the operation table plate (10). The two ends of the operation table plate (10) are respectively provided with a guiding groove (11) at the same horizontal line. The guiding grooves (11) are in sliding connection with a support (20). A retractor hook (21) is arranged above the support (20). According to the novel retractor, mechanical transmission is used for replacing manpower for fixing animal thoracic cavities and abdominal cavities for opening, manpower is saved, stability is good, an operation view field is large, animal bleeding amount is low, and the death rate of animals during operation is lowered.

The invention belongs to the technique field of producing multi-peptide drugs by gene engineering. It clones human EGF gene into the silkworm bacilliform virus (Bombyx mori Nuclear polyhedrosis Virus) transferring carrier pBacPAK8 and makes them carry through homologous reformation in the silkworm cells to obtain the reformed virus BmBacEGF with human-coat growing gene. Use the reformed virus to to inocualte the silkworm grub and chrysalis by acupuncture in order to make the human-coat growing gene efficient expressed. Then make the grub and chrysalis into oral drugs which has remarkable action on the digestible ulcer by examination on animal.

The invention relates to a new strain of pseudoalteromonas flavipulchra and use thereof. The new strain is the JG1 strain of the pseudoalteromonas flavipulchra, and the collection number of the JG1 strain of pseudoalteromonas flavipulchra is CGMCC No.5009; and the JG1 strain produces Pfa protein during metabolism. The JG1 strain of pseudoalteromonas flavipulchr, which is disclosed by the invention, can achieve antibacterial effects by means of bacteriocin protein, small molecular compounds and the like and can inhibit various common pathogenic bacteria in aquaculture animals; and the results of animal tests on zebra fish, mantis shrimps, scallops, clams and the like indicate that JG1 has neither toxic nor side effects on animals and that the bacterial preparation prepared by using the JG1 can be effectively used in actual production as a synergist in aquiculture. The Pfa protein produced in the metabolism of the JG1 strain has an obvious antibacterial effect and can be used as a preparation for improving the immunity in aquaculture animals.

The invention discloses lactobacillus rhamnosus LRa05, and the lactobacillus rhamnosus is collected in China General Microbiological Culture Collection Center, and the collection number is CGMCC 1.12734; the antagonistic ability of the lactobacillus rhamnosus has a good antagonistic effect on shigella, and the antagonistic ability of the lactobacillus rhamnosus is superior to that of common lactobacillus and commercial strain lactobacillus rhamnosus LGG; moreover, the lactobacillus rhamnosus has the characteristics of good acid resistance and bile tolerance; Animal test and human body test results show that a health-care food prepared from the lactobacillus rhamnosus LRa05 can effectively relieve symptoms including abdominal pain, diarrhea, fever and the like caused by the shigella; and besides, the lactobacillus rhamnosus belongs to probiotics, has been already incorporated into safe strains which can be applied to a food list directory, is excellent in safety, and can replace traditional antibiotics for use.

The invention discloses the use of spicebush root alkaloid in preparing medicament for treating chronic infectious arthritis and other immune diseases. Animal tests show that, the spicebush root alkaloid can substantially alleviate the degree of mouse joint pathological changes, and lower the mouse feet tumefaction degree caused by arthralgia due to wind-cold-dampness.