The use of a muscle stem cell in the preparation of a drug for preventing, alleviating and treating metabolic disorders, and a pharmaceutical composition for humans and animals, wherein the pharmaceutical composition comprises the muscle stem cell as a first active ingredient, a second active ingredient for regulating the glucose metabolism, and a pharmaceutically acceptable carrier.

The invention relates to method for cultivating stem cells in vitro, comprising the following steps: providing a sample comprising stem cells and cultivating the stem cells by subjecting the sample to a treatment for a first period of time. The treatment is carried out under hypothermic conditions having a defined temperature and a defined atmosphere, wherein the temperature does not exceed 15° C. and the atmosphere has an oxygen content not exceeding 21% (v/v). Thereby, the first period of time is 4 days to 4 weeks.

There are provided compositions and methods for modulating stem cell division, in particular, division symmetry. It has been demonstrated that Wnt7a polypeptide fragments promoting symmetrical expansion of stem cells. The compositions and methods of the invention are useful, for example, in modulating stem cell division symmetry in vitro, ex vivo, and in vivo, in replenishing and expanding the stem cell pool, and in promoting the formation, maintenance, repair and regeneration of tissue.

The present disclosure relates to a compound of formula (I)

##STR00001##

where R.sub.1 is as defined herein. The compound of formula I is an inhibitor of the dephosphorylation of phosphorylated elF2α. The phosphorylation of elF2α affects the quiescence and self renewal properties of stem cells such as muscle stem cells. The compound of formula (I) can thus be used to expand stem cells populations and treat degenerative diseases that have a quiescence regulation affected or mediated by the phosphorylation of elF2α.

Methods and compositions for somatic cell proliferation as well as increasing viability of somatic cells are provided. The compositions include heparin binding protein isolated from a medium conditioned by growth of pluripotent stem cells, such as, human embryonic stem cells, human embryonic carcinoma cells. The methods include contacting a somatic cell with a heparin binding protein composition for a sufficient period of time to provide for enhanced proliferation and/or viability of the somatic cell as compared to the absence of the heparin binding protein composition.

Provided herein are genetically engineered mammalian cells that endogenously express one or more phytochemicals, vitamins, or therapeutic agents and suitable for use in a cultured meat product. Methods of making and using the genetically engineered mammalian cells and the cultured meat products are also provided.

Provided herein are bovine cells that are adapted to grow in growth medium that contains low-serum or no serum and methods thereof. Also provided are food products made from bovine cells cultivated in vitro and methods for harvesting the cells.

The invention is in the field of cell culturing. More specifically, it is in the field of generating and expanding myogenic cells from induced pluripotent stem (i PS) cells. The invention relates inter alia to cells generated and expanded via such a method, a growth medium specifically suited for the purpose of expanding isolated myogenic cells, and methods for screening compounds on cell structures such as myotubes and myofibers.

The present invention relates to the field of muscle regeneration, and more particularly to the replenishment of the in vivo muscle stem cells pool. It more specifically relates to a 5-hydroxytryptamine B1 receptor-stimulating agent, and to a composition comprising said agent, for use as i) a promoter of satellite cells self-renewal and/or differentiation, and/or ii) an agent preventing and/or inhibiting the satellite cells pool exhaustion. The invention further encompasses therapeutic and screening methods.

An in vitro meat having non-decellularized leaf scaffold and a method for producing an in vitro meat using non-decellularized leaf scaffold are described herein. The method includes preparing a non-decellularized plant leaf and incubating the leaf in a cell culture media to obtain a non-decellularized leaf scaffold; seeding the leaf scaffold with a population of muscle cells to obtain a leaf scaffold adhered population of muscle cells; and growing the leaf scaffold adhered population of muscle cells in cell culture media thereby obtaining the in vitro meat.