The University of Tokyo

Leland Stanford Junior University

National Federation of Agricultural Coopertive Associations

National Federation of Agricultural Cooperative Associations

Motoo Watanabe

Irving L Weissman

Masatoshi Sakurai

Hiromitsu Nakauchi

Hideki Masaki

Satoshi Yamazaki

Tetsuya Ito

Tomoyuki Yamaguchi

Hideyuki Sato

Yutaka Sendai

Kazuo Fukawa

Mai Kamikawa

Sanae Hamanaka

Naoaki Mizuno

The present invention has found that chimeric animals suffer from noticeable inflammation after birth, though neither immune response nor inflammation in the fetal period of these animals has been reported hitherto. This is an unexpected finding since chimeric animals in the fetal period were exclusively analyzed in prior studies and thus it is deemed that immunotolerance has been theoretically established therein. The present invention provides a composition for suppressing immune response or inflammation in the fetal period of a born chimeric animal.

Finding and treatment of inflammation after birth in chimeric animal

The present invention provides a method for producing a chimeric animal using a primed pluripotent stem cell, a tissue stem cell, a progenitor cell, a somatic cell, or a germ cell. The method for producing a chimeric animal according to the present invention comprises introducing a mammal-derived cell into the embryo of a mammal, the cell being primed pluripotent stem cell, tissue stem cell, progenitor cell, somatic cell, or germ cell.

Method for producing chimeric animal

The present invention discloses a novel means capable of producing a blood chimeric animal in which a state of retaining blood cells originating in a heterologous animal at a high percentage is sustained for a long period of time. The method for producing a non-human animal that retains blood cells originating in a heterologous animal, according to the present invention, comprises transplanting hematopoietic cells of a heterologous animal into a non-human animal, in which hematopoietic cells the function of a gene that acts on the hematopoietic system is modified, The gene that acts on the hematopoietic system is, for example, Lnk gene, When a medium to large mammal is used as a recipient, the survival rate of hematopoietic cells originating in a heterologous animal is dramatically increased such that blood chimerism of 10% or more can be maintained even in a 16 month old animal.

Method for producing blood chimeric animal

[Problem to be Solved] The present invention provides a method for producing a chimeric animal using a primed pluripotent stem cell, a tissue stem cell, a progenitor cell, a somatic cell, or a germ cell. [Solution] The method for producing a chimeric animal according to the present invention comprises introducing a mammal-derived cell into the embryo of a mammal, the cell being primed pluripotent stem cell, tissue stem cell, progenitor cell, somatic cell, or germ cell.

Growing community of inventors

Tokyo, Japan

Motoo Watanabe