摘要:
The invention provides hollow nanoparticles of a protein with the ability to recognize specific cells such as the hepatocytes and to form particles (for example, hepatitis B virus surface-antigen protein), wherein the protein has a cysteine residue substituted to a different amino acid. The hollow nanoparticles have a stable particle structure and can be used to efficiently transfer substances to specific target cells or tissues. The invention also provides a drug using the hollow nanoparticles.
摘要:
Provided is a lactic acid bacterium capable of homolactic fermentation using a pentose as a substrate, the lactic acid bacterium utilizing a pentose, and in which a phosphoketolase pathway is blocked and a pentose phosphate pathway is activated. Also provided is a method for producing lactic acid from a pentose using the lactic acid bacterium and a method for preparing the lactic acid bacterium.
摘要:
Provided is a radiotherapeutic agent, including a composite particle, which is obtained by binding a molecule that specifically recognizes a target to a substrate particle including titanium peroxide, and which generates reactive oxygen through irradiation with a radiation. Further, because the radiotherapeutic agent contains the molecule that specifically recognizes a target, the radiotherapeutic agent has a function of accumulating in the target. The radiotherapeutic agent is capable of enhancing effects of radiotherapy, and is capable of reducing side effects on a living body to efficiently attack the target.
摘要:
The present invention provides a method for producing an yeast having an increased cellulose hydrolysis ability. The method includes the step of introducing increased integration copy numbers of both a gene for an enzyme capable of hydrolyzing crystalline cellulose and a gene for an enzyme capable of hydrolyzing noncrystalline cellulose into a noncellulolytic yeast to give a transformed yeast. The yeast having an increased cellulose hydrolysis ability can be suitably used for ethanol production from cellulose-based materials.
摘要:
An object of the present invention is a method for introducing a foreign gene into a yeast cell that does not have an auxotrophic marker. The present invention provides a method for providing a target auxotrophy to a yeast cell and introducing a gene to be expressed into the yeast cell. The method includes the step of transforming a yeast cell with a fragment containing an expression cassette for the gene to be expressed, a cassette for a yeast selectable marker, and two homologous recombination fragments each homologous to a region on either side of a target auxotrophy controlling gene. According to the method, a target auxotrophy controlling gene is deleted from a yeast cell and a gene to be expressed is introduced into the yeast cell, and further the yeast selectable marker is eliminated from the transformed yeast cell.
摘要:
The subject invention provides a disease-treating drug that uses hollow protein nanoparticles to specifically act on a target cell or tissue. The present invention allows a protein drug to be effectively capsulated in the particles. The invention also provides a therapeutic method using such a drug. The drug according to the present invention is capable of recognizing a specific cell, such as hepatocytes, and manufactured by fusing a disease-treating substance for a target cell (for example, interferon, hepatocyte growth factor etc.) with hollow nanoparticles of a particle-forming protein (for example, hepatitis B virus surface-antigen protein).
摘要:
A therapeutic product or drug for therapy of hemophilia may be produced by a simplified method including embedding genes of the blood clotting factors VIII (IX) for therapy of hemophilia in hollow nano particles obtained on expressing the protein having a particle forming function, such as hepatitis B virus surface antigen protein, in eucaryotic cells. The drug so produced is able to introduce the genes of the blood clotting factors efficaciously into liver cells with the least risk of side effects.
摘要:
The invention provides a disease-treating drug, specifically acting particular cells or tissues, which is based on protein hollow nanoparticles. The drug's therapeutic effects are confirmed through animal experiments. The invention also provides a treatment method using the drug. The disease-treating drug comprises a substance to be transferred into a cell for treatment of a disease (for example, cancer-treating, thymidine kinase gene of herpes simplex virus type 1) encapsulated in hollow nanoparticles containing particle-forming protein (for example, hepatitis B virus surface antigen protein modified to lose infectivity to inherent hepatocyte and also display a growth factor) displaying, for example, a growth factor.
摘要:
The invention provides a drug for treating hepatic diseases with the use of hollow protein nanoparticles. The effectiveness of the drug has been proved by animal testing. The invention also provides a therapeutic method using such a drug. In a drug according to the present invention, a substance to be transferred into a cell for treating a hepatic disease (for example, a cancer treating gene such as a thymidine kinase gene derived from simple herpes virus) is encapsulated in hollow nanoparticles that have an ability to recognize a hepatocyte and are composed of a particle-forming protein (for example, hepatitis B virus surface-antigen protein).
摘要:
The present invention provides a method for measuring oocyst of protozoa, such as Cryptosporidium, in an environment sample with high sensitivity at low cost within a short period of time; and a detecting reagent for use therein.Magnetic fine particles of 5 to 500 nm particle diameter having, immobilized thereto, binding factors for specific recognition of oocyst are added to an analyte containing a protozoan oocyst to form oocyst/binding factor/magnetic fine particle complexes by using a binding reaction to the oocyst, the formed complexes are recovered by a magnetic separation, and the protozoan oocysts contained in the complexes are assayed. Further, there is provided, for conducting the above method, a reagent for detecting protozoan oocysts comprising magnetic fine particles of 5 to 500 nm particle diameter having, immobilized thereto, antibodies against oocysts or binding factors for recognizing the antibodies.