35 results about "Tissue explants" patented technology

The present invention relates to new reinforced biodegradable scaffolds for soft tissue regeneration, as well as methods for support and for augmentation and regeneration of living tissue, wherein a reinforced biodegradable scaffold is used for the treatment of indications, where increased strength and stability is required besides the need for regeneration of living tissue within a patient. The present invention further relates to the use of scaffolds together with cells or tissue explants for soft tissue regeneration, such as in the treatment of a medical prolapse, such as rectal or pelvic organ prolapse, or hernia.

The present invention provides a novel method to isolate and expand pure progenitor/stem cells from a primary tissue explant, which produces a population enriched in multipotent functional progenitor/stem cells free of contaminating fibroblasts and other cell types. Cardiac progenitor/stem cells isolated by this method maintain their self-renewal and clonogenic character in vitro and differentiate into normal cells in myocardium, including cardiomyocytes, endothelial cells, and smooth muscle cells, after transplantation into ischemic hearts. The present invention also includes substantially pure populations of multipotent progenitor/stem cells, e.g., cardiac progenitor/stem cells, and their use to treat and prevent diseases and injuries, including those resulting from myocardial infarction.

The invention relates to a construction method and ultralow temperature freezing and storing method of a sinocyclocheilus grahami saccus olfactorius cell line, and belongs to the technical field of cell culture and ultralow temperature freezing and storing method of the biological cell of freshwater aquatic life. A sinocyclocheilus grahami saccus olfactorius tissue is used as a raw material to be cultured in an L-15 culture solution at the pH (Potential of Hydrogen) value of 7.0-7.2 and comprising fetal calf serum by means of a tissue explant and subculture is carried out by means of trypsin digestion. The method specifically comprises the preparation of a cell culture solution, primary culture and subculture. The construction method disclosed by the invention has the following beneficial effects: (1) primary culture takes short time, and cell mass is large and can be applied to chromosome analysis; (2) the constructed sinocyclocheilus grahami saccus olfactorius cell line is in fiber like morphology, can be subcultured continuously and directly applied to a research on biological characteristics, and satisfies the demands of the storage, the theoretical research and the application of sinocyclocheilus grahami germplasm resources; (3) the construction method is also applicable to the construction of saccus olfactorius cell lines of other fishes.

The invention relates to a gastroesophageal junction smooth muscle cell tissue explant primary culture and identification method. The method includes steps: acquiring gastroesophageal junction smoothmuscle tissue muscle strips; digesting the smooth muscle tissue muscle strips by digestive juice to obtain digested smooth muscle tissue blocks; transferring the digested smooth muscle tissue blocks into a culture container to fix the digested smooth muscle tissue blocks to the bottom of the culture container, keeping a gap of 0.5-1cm between every two adjacent digested smooth muscle tissue blocks, and culturing until adherent cells occupy more than 90% of the bottom of the culture container or the adjacent digested smooth muscle tissue blocks contact through new cells. The invention further provides a smooth muscle cell identification method. The gastroesophageal junction smooth muscle cell tissue explant primary culture method is simple, perfect and effective, and specific phenotypes ofthe smooth muscle cells can be identified by adoption of the identification method.

Method for the production of taxol and/or taxanes, comprising the steps of: a) inducing the formation of callus from a plant tissue explant, through in vitro culturing in a suitable nutritient medium, b) cultivating the callus in a liquid medium to obtain a cell suspension culture capable of producing taxol and/or taxanes, c) recovering the taxol and/or the taxanes from the cells and/or from the culture medium of the cell suspension obtained from the callus in which the tissue explant is obtained from a plant of the genus Corylus, in particular Corylus avellana.

The present invention relates to methods of ex-vivo modification of mammalian tissue, via genetic transformation or introduction of cells, followed by implantation of the modified tissue into a patient in need thereof. Preferably, the tissue is microvascular free flap (or microvascular bed) tissue. A tissue explant is detached from the native circulation of a donor, transfected ex vivo, and then attached (anastomosed) to a recipient, either the donor or another patient. In a preferred embodiment, the mammalian tissue is human tissue and the patient is a human patient. Transfection with a nucleic acid encoding a product of interest is performed by contacting the selected tissue with a vector, preferably a viral vector, most preferably an adenoviral vector, that comprises the nucleic acid encoding the product of interest. The nucleic acid encoding the product of interest is driven by regulatory element such as an inducible, constitutive or cell-specific promoter, preferably an inducible or constitutive promoter. After genetic transformation of the selected tissue, the tissue is flushed to remove the vector not incorporated into the cells of the tissue. The tissue is then attached to the native circulation of the recipient using microvascular techniques. In one aspect, the invention provides methods of local delivery of a product (protein) of interest. In another aspect, the invention provides methods of systemic delivery of a product of interest. In yet another aspect, the invention provides methods of both local and systemic delivery of a product of interest. In yet another aspect, the invention provides methods for producing a "neo-organ," i.e., a non-naturally occurring vascularized tissue that provides a function of a gland or organ, or that supplements the function of a gland or organ, and that delivers locally or systemically a product of interest to a patient in need thereof.

The invention provides an establishing method of a Chinese tongue squamous cancer cell line (CTSC-1), and provides a material base for researching the characteristics of tongue squamous cancer and therapeutics thereof. The establishing method comprises the steps of: carrying out primary culture on the tongue squamous cancer cells by adopting a tissue explants adherent method; subculturing when the cell density reaches about 80 percent; carrying out RT-PCR (Reverse Transcription-Polymerase Chain Reaction) detection on stably subcultured cells to indicate that the cells express tongue squamous cancer cell symbolic molecules CK 8, 18 and 19; and detecting adherent cells through a western blot test to express proteins of the tongue squamous cancer cell symbolic molecules CK 8 and 18, therefore, proving on a molecular level the successful establishment of the CTSC-1.

The invention discloses a method for isolating and cultivating milk cow breast cells in vitro, relating to the cell in vitro isolation and culture technology field and solving the problem that breast fibrocytes and epithelial cells of a milk cow cannot be isolated completely during the isolation and culture of the breast epithelial cells of the milk cow. The method comprises the following steps of: selecting mammary tissue of a milk cow which is killed on the very day from a local abattoir, adopting tissue explants technique and graded trypsin digestion technique to isolate and cultivate the breast epithelial cells of the milk cow according to the different sensibility of the fibroblasts and epithelial cells to trypsin and the different adhering time, purifying the breast epithelial cells of the milk cow, identifying with keratin 18 to obtain the corresponding cell system finally. The method provides the best trypsin concentration when isolating and cultivating the breast epithelial cells of a milk cow, and can completely isolate the breast fibrocytes and the epithelial cells of the milk cow from each other.

The invention discloses a method for separating, cultivating and identifying a skin epithelial cell of a giant salamander. According to the method, a skin tissue is acquired from the tail part of the giant salamander, a tissue explant method is used to separate to acquire the primary skin epithelial cell of the giant salamander, the primary skin epithelial cell of the giant salamander is subjected to primary culture and subculture in a specific culture solution (the ingredients comprise DMEM/F12 (60%), 15% of FBS, 5 mug/mL of insulin, and 10 ng/mL of KGF) at the temperature of 28 DEG C, and specific genes (K5, K10 and P63) of the acquired skin epithelial cell of the giant salamander are expressed and identified through RT-PCR (Reverse Transcription-Polymerase Chain Reaction). The homologous design primer of the gene sequence of the related species is used to conduct PCR amplification on the genes K5, K10 and P63 of the giant salamander to acquire the gene sequences of K5, K10 and P63 of the giant salamander for the first time. The provided method for separating, cultivating and identifying the skin epithelial cell of the giant salamander lays foundations for the deep study of the skin of the giant salamander as well as the skin regeneration, trauma repair and tissue engineering skin construction with the help of the skin epithelial cell of the giant salamander.

The invention provides an establishing method of a Chinese tongue squamous cancer cell line (CTSC-2), and provides a material base for researching the characteristics of tongue squamous cancer and therapeutics thereof. The establishing method comprises the steps of: carrying out primary culture on the tongue squamous cancer cells by adopting a tissue explants adherent method; subculturing when the cell density reaches about 80 percent; carrying out RT-PCR (Reverse Transcription-Polymerase Chain Reaction) detection on stably subcultured cells to indicate that the cells express tongue squamous cancer cell symbolic molecules CK 8, 18 and 19; and detecting adherent cells through a western blot test to express proteins of the tongue squamous cancer cell symbolic molecules CK 8 and 18, therefore, proving on a molecular level the successful establishment of the CTSC-2.