摘要:
The present invention provides a method which can achieve the homologous recombination of a gene of interest selectively, and a recombinant DNA molecule produced by the method. A homologous recombination method which uses a PCR product and a linearlized vector is disposed. The PCR product comprises a sequence for a target gene and amplification primer sequences P1 and P2 on both terminal ends. The vector contains homologous recombination regions VP1 and VP2 which respectively comprises nucleotide sequences homologous to the amplification primer sequences P1 and P2 of the PCR product, and a homologous recombination region VT1 which comprises a nucleotide sequence homologous to a sequence T1 that is a part of sequence in the PCR product internal to P1 on the terminal side of VP1 and/or a homologous recombination region VT2 which comprises a nucleotide sequence homologous to a sequence T2 that is a part of sequence in the PCR product internal to P2 on the terminal side of VP2 (provided that at least one of T1 and T2 has a nucleotide sequence specific to the target gene). The method comprises subjecting the PCR product to a homologous recombination reaction to insert the PCR product into the vector, thereby producing a recombinant DNA molecule in which the PCR product of interest specifically inserted into the vector. Also disclosed a cloning method for producing the recombinant DNA molecule comprising the vector and the PCR product of interest specifically inserted into the vector by the homologous recombination method, and amplifying the recombinant DNA molecule.
摘要:
A collagen production promoter in cells, containing at least one member selected from the group consisting of 1,5-anhydro-D-glucitol and derivatives thereof; and a composition containing the collagen production promoter. Since the collagen production promoter containing 1,5-AG or derivatives thereof of the present invention is suitably used as cosmetics, medicinal formulations, foods, and the like, for promoting collagen production in cells, for example, preventing and/or improving wrinkles of skin.
摘要:
A collagen production promoter in cells, containing at least one member selected from the group consisting of 1,5-anhydro-D-glucitol and derivatives thereof; and a composition containing the collagen production promoter. Since the collagen production promoter containing 1,5-AG or derivatives thereof of the present invention is suitably used as cosmetics, medicinal formulations, foods, and the like, for promoting collagen production in cells, for example, preventing and/or improving wrinkles of skin.
摘要:
An object is to provide a TCR cloning system that enables not only bias-free analysis of TCR repertoires, but also collection of antigen-specific TCR α/β cDNA pairs and evaluation of functions thereof. There is provided a method for producing a gene of T cell receptor (TCR) specific to an antigen A, which comprises 1) the step of stimulating a group of T cells including a T cell specific to an antigen A or one T cell specific to an antigen A under a condition effective for amplification of a TCR gene; 2) the step of identifying a T cell specific to an antigen A among the group of T cells including a T cell specific to the antigen A, and sorting one T cell specific to the antigen A into a vessel; and 3) the step of subjecting the one activated T cell specific to the antigen A in the vessel to PCR to amplify a gene of TCR specific to the antigen A. According to the present invention, a target TCR gene can be cloned within a shorter time compared with that required by the conventional methods, for example, about ten days. Further, according to the present invention, genes of TCR α chain and β chain can be highly efficiently cloned. Under the conditions of the examples, a pair of a TCR α chain and TCR β chain could be obtained from stimulated T cells sorted as single cells at a ratio of 100%.
摘要:
The present invention is intended to provide a novel anticancer agent which is effective to a cancer. After administering an agent prepared using burdock fruit extract to a pancreas cancer patient so that a dose of arctigenin was 100 mg or more per day, the tumor reducing effect was observed, and, in addition, lowering of tumor markers was confirmed. The present invention provides an anticancer agent containing arctigenin, wherein a dose of the arctigenin is 100 mg or more per day. In addition, the present invention provides the anticancer agent containing arctigenin and arctiin at a weight ratio of arctigenin/arctiin = 0.7 to 1.3.
摘要:
The purpose of the invention is to provide means with which it is possible to efficiently select a vector to which a foreign gene has been introduced when a foreign gene is to be introduced by homologous recombination to a vector having multiple sequences homologous with one another. The vector comprises, in succession, a replication origin, a sequence A, a marker gene X, two sequences C and D for introducing a foreign gene by homologous recombination, and a sequence B homologous with sequence A. The two sequences C and D are directly or indirectly adjacent to one another. The vector is used for introducing a foreign gene between the two adjacent sequences C and D.
摘要:
PROBLEM TO BE SOLVED The present invention is intended to provide a burdock fruit extract containing arctigenin and arctiin at a definite ratio and a method for producing the same. More particularly, the present invention is intended to provide a method for producing a burdock fruit extract containing arctigenin and arctiin at a weight ratio of approximately 1:1. SOLUTION A method for producing a burdock fruit extract containing arctigenin and arctiin at a weight ratio of arctigenin/arctiin = 0.7 to 1.3 is provided, including the steps of: cutting a burdock fruit and converting arctiin which is inherent in the burdock fruit into arctigenin by enzymatic conversion by beta-glucosidase which is inherent in the burdock fruit, wherein the enzymatic conversion includes reaction at a temperature from 20°C to 50°C. Also provided is the method further including a step of extracting an extract containing arctigenin and arctiin by adding an organic solvent and heating to reflux.