The prevent invention provides an activated T cell in which the expression of an immune checkpoint molecule is suppressed, a method for producing the T cell, and a method for screening for a substance that can be used in the production of the T cell. Specifically, the prevent invention includes, as solving means, a method for producing or inducing a T cell in which the expression of an immune checkpoint molecule is not induced, the method comprising reducing or losing the function of UDP-glucose ceramide glucosyltransferase (UGCG) or ganglioside in a T cell, and a T cell produced or induced by the aforementioned method.

A method for producing an objective substance such as sphingoid bases and sphingolipids using yeast is provided. An objective substance is produced by cultivating yeast having an ability to produce the objective substance in a culture medium containing an additive that is able to associate with, bind to, solubilize, and/or capture the objective substance, and collecting the objective substance from cells of the yeast and/or the culture medium.

A method for producing an objective substance such as sphingoid bases and sphingolipids using yeast is provided. An objective substance is produced by cultivating yeast having an ability to produce the objective substance in a culture medium containing an additive that is able to associate with, bind to, solubilize, and/or capture the objective substance, and collecting the objective substance from cells of the yeast and/or the culture medium.

The present invention relates to a method for preparing a recombinant cell line producing recombinant glycoproteins having a high sialic acid content by inhibiting glycosphingolipid (GSL) biosynthesis pathway in a cell line producing recombinant glycoproteins. Particularly, the present invention produces erythropoietin (EPO), containing a high content of sialic acid in a cell, from a cell line, which induces CGT inhibition by using siRNA and miRNA specifically binding to ceramide glucosyltransferase (CGT), thereby increasing the in vivo half-life of a recombinant therapeutic protein, and thus can be useful in the treatment of disease using the same.

The invention is related to materials and methods for production of carminic acid from substrates. The invention provides methods and materials for cell-free bioproduction of carminic acid.