Complex Containing Neural Retina-Containing Cell Aggregates and Matrix, and Method for Manufacturing Same

1 : A complex comprising:

two or more cell aggregates each containing a neural retina derived from a pluripotent stem cell; and

a matrix,

the two or more cell aggregates being arranged in the matrix, wherein

the neural retina is a transplant neural retina sheet having the following features (1) to (10):

(1) being derived from a pluripotent stem cell,

(2) having a three-dimensional structure,

(3) comprising a neural retinal layer having a plurality of layer structures including a photoreceptor layer and an inner layer,

(4) the photoreceptor layer comprising one or more cells selected from the group consisting of a photoreceptor progenitor cell and a photoreceptor cell,

(5) the inner layer comprising one or more cells selected from the group consisting of a retinal progenitor cell, a ganglion cell, an amacrine cell and a bipolar cell,

(6) the surface of the neural retinal layer having an apical surface,

(7) the inner layer being present inside the photoreceptor layer present along the apical surface,

(8) the area of the neural retinal layer being 50% or more with respect to the total area of the surface of the transplant neural retina sheet,

(9) the area of a continuous epithelium structure being 80% or more with respect to the total area of the apical surface of the neural retinal layer, and

(10) the expression of neural retina-related cell-related gene being found and the expression of non-neural retina-related cell-related gene being not found in the transplant neural retina sheet, wherein the non-neural retina-related cell-related gene comprising one or more genes selected from the group consisting of brain and spinal cord tissue marker gene and eyeball-related tissue marker gene.

2 : The complex according to claim 1 , wherein the cell aggregates have a major axis of 600 μm to 2500 μm, and the two or more cell aggregates are arranged in a row in the matrix.

3 : The complex according to claim 1 , wherein the matrix is fibrin gel or gelatin.

4 : A method for manufacturing a complex in which two or more neural retina-containing cell aggregates are arranged in a matrix, comprising:

(1) a first step of preparing two or more cell aggregates of neural retinas from pluripotent stem cells; and

(2) a second step of contacting the two or more cell aggregates in a predetermined arrangement with the matrix or a precursor of the matrix, followed by the gelation of the matrix.

5 : The manufacturing method according to claim 4 , comprising, in the second step, arranging 2 to 20 cell aggregates in a row.

6 : The manufacturing method according to claim 4 , wherein the matrix is fibrin gel, and in the second step, the gelation is performed by arranging the two or more cell aggregates in a row, and contacting the two or more cell aggregates arranged with any one of a fibrinogen solution and a thrombin solution and further with the other solution of the fibrinogen solution and the thrombin solution so that the fibrinogen and the thrombin are reacted.

7 : The manufacturing method according to claim 4 , wherein the matrix is gelatin.