Disclosed herein are methods and compositions for generating pacemaker cells from non-pacemaker cardiomyocytes. For example, the method includes the step of culturing the non-pacemaker cardiomyocytes with silk fibroin so that the silk fibroin induces the transformation of at least a portion thereof into pacemaker cells.

The present invention relates to an aqueous extract useful notably for the regeneration of human or animal cells, notably mammalian cells, comprising an aqueous extract free of any insoluble solid debris of ground planarian organisms having a regeneration capacity, containing at least the intracellular components of the cells of said organisms of a cell lysate of said cells of said organisms.

By establishing effective methods for shrimp 3D cell culture and passage, the present invention provides a technology of continuous shrimp cell culture intended for the establishment of immortalized shrimp cell lines. The present invention provides a preparation method of matrigel for 3D cell culture of shrimp by optimizing an additive proportion of matrigel. The present invention further provides a technology of separation and 3D cell culture of shrimp haemolymph cells, where shrimp haemolymph cells adhere to and grow on the surface of the matrigel in the form of a single round cell and a cell pellet/cellular spheroid, with survival and growth abilities being superior to 2D culture effects. The above technology is achieved by optimizing a formula of complete medium for shrimp cells, selecting the medium as an anticoagulant and a diluent for shrimp haemolymph cells, selecting a 3D culture method for surface-adhered growth in the matrigel.

By establishing effective methods for shrimp 3D cell culture and passage, the present invention provides a technology of continuous shrimp cell culture intended for the establishment of immortalized shrimp cell lines. The present invention provides a preparation method of matrigel for 3D cell culture of shrimp by optimizing an additive proportion of matrigel. The present invention further provides a technology of separation and 3D cell culture of shrimp haemolymph cells, where shrimp haemolymph cells adhere to and grow on the surface of the matrigel in the form of a single round cell and a cell pellet/cellular spheroid, with survival and growth abilities being superior to 2D culture effects. The above technology is achieved by optimizing a formula of complete medium for shrimp cells, selecting the medium as an anticoagulant and a diluent for shrimp haemolymph cells, selecting a 3D culture method for surface-adhered growth in the matrigel.

Disclosed herein are methods and compositions for generating pacemaker cells from non-pacemaker cardiomyocytes. For example, the method includes the step of culturing the non-pacemaker cardiomyocytes with silk fibroin so that the silk fibroin induces the transformation of at least a portion thereof into pacemaker cells.

Disclosed herein are methods and compositions for generating pacemaker cells from non-pacemaker cardiomyocytes. For example, the method includes the step of culturing the non-pacemaker cardiomyocytes with silk fibroin so that the silk fibroin induces the transformation of at least a portion thereof into pacemaker cells.

A method is provided for culturing cochineal insects. In accordance with the method, a medium is created (101-109) from a mixture comprising a plant or cactus additive and a polymeric material. The medium is then inoculated (111) with a species selected from the group consisting of the genus Dactylopius.

A cell culture medium that sustains the growth of cells obtained from a crustacean in vitro. Indeed, the disclosure describes a cell culture medium comprising a specific salt composition, in part responsible for the correct osmolality and pH, a specific amino acid and vitamin composition, energy sources such as glucose, and crustacean hemolymph. This disclosure further shows that the cell culture medium is capable of keeping cells obtained from shrimp and lobster viable for long periods of time even after passaging the cells into subcultures and inducing the cells to proliferate. The cultured cells are, for example, useful for performing physiological studies on certain genes (by genetic engineering) and for doing research and diagnosis on crustacean pathogens.

A method is provided for culturing cochineal insects. In accordance with the method, a medium is created (101-109) from a mixture comprising a plant or cactus additive and a polymeric material. The medium is then inoculated (111) with a species selected from the group consisting of the genus Dactylopius.