National Institute of Advanced Industrial Science and Technology

Kataoka Corporation

National Institute of Advanced Industrial Science

Kimio Sumaru

Toshiyuki Kanamori

Toshiyuki Takagi

Junichi Matsumoto

Shinji Sugiura

Masami Suzuki

Norio Nishi

Fumiki Yanagawa

Masato Tamura

Kyoko Kikuchi

Taku Sato

Manae Yamaguchi

Kana Morishita

A cell culture instrument configured to detach cells at a desired position and a cell processing method using the cell culture instrument. The cell culture instrument includes: a substrate; and a photoreactive layer having a photosolubility and a photothermal convertibility, wherein the photoreactive layer is laminated on the substrate, and the photoreactive layer includes a polymer having a photosolubility and a photothermal convertibility.

Cell culture instrument and cell processing method

A laser processing machine for killing specific cells from a group of cells on a surface of a layer containing an ingredient capable of absorbing laser light, the laser processing machine being configured to: control a laser light source to output laser light at 5W or less and at a wavelength of 380 nm or greater such that the laser light source is applied to a second area on a second surface of the layer opposed to the first surface; and control an actuator to provide a relative movement between the second area where the laser light is applied and the layer at a rate of 2000 mm/sec or less such that the irradiated second area absorbs energy to generate heat that kills unwanted cells on a first area of the first surface and the laser light does not instantly kill the specific cells on the first area upon irradiation.

Laser processing machine

A polymer compound is provided which is changed from a water-insoluble state to a water-soluble state by irradiation with light. The polymer compound is represented by Formula (5), where A and B are a single bond or a functional group, R, R, and Rare hydrogen or an alkyl group, and Rand Rare hydrogen, an alkyl group, or the like.

Polymer compound and method for manipulating cell using same

A method of killing specific cells from among a group of cells cultured in a culture vessel by quick and brief laser treatment, the cell culture vessel comprising a main body and a to-be-irradiated layer attached to the main body, the to-be-irradiated layer containing an ingredient capable of absorbing laser light upon laser irradiation, the group of cells being cultured on the surface of the to-be-irradiated layer, the method comprising:

Cell treatment method, laser processing machine, and cell culture vessel

Provided are a photodegradable hydrogel in which cells can be embedded in the photodegradable gel without causing cytotoxicity when the cells are embedded in the photodegradable gel by allowing the cells to coexist at the time of preparation of the photodegradable gel, and which contains a protein as one of the main components; a culture device using the same; a method for forming tissue; and a method for separating cells. A photodegradable hydrogel is obtained by condensation of an alkyne group contained in a cyclooctyne ring or an azacyclooctyne ring of the following compound A with an azido group of the following compound B. (Compound A) A compound is a photocleavable crosslinker which contains a main chain having a linear type- or a branched type- (of three or more branches) polyethylene glycol structure, a photodegradable nitrobenzyl group disposed at both terminals or a branched terminal of the main chain, and a group having a cyclooctyne ring or an azacyclooctyne ring disposed at a terminal side of the nitrobenzyl group. (Compound B) A compound is an azide-modified protein in which a main chain is a protein and at least some of an amino group present at lysine and arginine side chains of the main chain and an amino group present at a terminal of the main chain are modified with the azido group.

Photodegradable hydrogel, culture device, method for forming tissue, and method for separating cells

The present invention provides a photodegradable cross-linking agent capable of manufacturing a photodegradable gel, which has appropriate moisture content and water solubility as a cell carrier and has strength that makes it possible to construct a complicated three-dimensional microstructure. The photodegradable cross-linking agent of the present invention includes a main chainwhich is composed of branched polyethylene glycol having three or more branched chains and a photodegradable benzyl groupwhich is disposed on the terminus of the branched chains, in which the benzyl group has an active ester group, which is reactive with an amino group or a hydroxyl group, and one or more nitro groups in a benzene ring.

Photodegradable cross-linking agent, photodegradable gel, cell culture instrument, cell arrangement-sorting apparatus, cell arrangement method, cell sorting method, tissue forming method, and tissue

A method for separating cells which includes: adhering cells to the surface of a cell culture substrate containing a photo-acid generator that generates an acidic substance upon irradiation with active energy rays, and irradiating only a partial region of the cell culture substrate with the active energy rays to selectively remove the cells within the partial region, thereby separating the cells within the partial region and cells in other regions.

Growing community of inventors

Tsukuba, Japan

Kimio Sumaru