What is chondrogenic differentiation?
What is chondrogenic differentiation?
Chondrogenic Induction. Bone marrow-derived mesenchymal stem cells can be induced to differentiate into chondrocytes under specific culture conditions. Together with these physical culture conditions, a defined culture medium containing TGF-β1 is required to achieve chondrogenic differentiation (18, 19, 78).
How do chondrocytes differentiate?
Chondrocytes communicate with each other mainly via diffusible signals rather than direct cell-to-cell contact. The chondrogenic differentiation of mesenchymal stem cells (MSCs) is well regulated by the interactions of varieties of growth factors, cytokines, and signaling molecules.
What is pellet culture?
Pellet culture is a scaffold free 3D culture form, which is commonly used to stabilize the chondrogenic potential of in vitro cultured chondrocytes [2,7,31]. This is mainly due to the high cellular density within pellet culture inducing a high amount of cell–cell contacts.
What is Chondrogenic medium?
ChondroLife™ Complete Chondrogenesis Frozen Medium is a new medium optimized for the differentiation of Human Mesenchymal Stem Cells into chondrocytes. Antimicrobials are not required, but are recommended during differentiation due to the duration of culture and the frequency of handling of the cultures.
Is Aggrecan a gag?
Almost 90% of aggrecan mass is comprised of substituted GAG chains which are mostly chondroitin sulfate chains, but also include keratan sulfate chains with N- and O-linked oligosaccharides. Each aggrecan contains ∼ 100 chondroitin sulfate chains, which are typically ∼ 20 kDa each.
What is Chondrogenic cells?
Chondrocytes (/ˈkɒndrəsaɪt, -droʊ-/, from Greek χόνδρος, chondros = cartilage + κύτος, kytos = cell) are the only cells found in healthy cartilage. They produce and maintain the cartilaginous matrix, which consists mainly of collagen and proteoglycans.
What is an Osteocyte and chondrocyte?
Osteocytes and chondrocytes are the cells of bone and cartilage, respectively. They originate from mesenchymal cells. Osteocytes are developed in the mucoid connective tissue and a mature osteocyte contains a single nucleus. Chondrocytes are involved in the maintenance of cartilage.
What is the perichondrium of cartilage?
The perichondrium is a dense layer of fibrous connective tissue that covers cartilage in various parts of the body. Perichondrium tissue commonly covers these areas: elastic cartilage in parts of the ear. hyaline cartilage in the larynx.
What is ACAN gene?
The ACAN gene provides instructions for making the aggrecan protein. Aggrecan is a type of protein known as a proteoglycan, which means it has several sugar molecules attached to it. It is the most abundant proteoglycan in cartilage, a tough, flexible tissue that makes up much of the skeleton during early development.
Do chondrocytes produce aggrecan?
Aggrecan is the major proteoglycan in the articular cartilage. Aggrecan is a multimodular molecule expressed by chondrocytes. Its core protein is composed of three globular domains (G1, G2, and G3) and a large extended region (CS) between G2 and G3 for glycosaminoglycan chain attachment.
Where are Chondrogenic cells located in a cartilage model?
Structure. The chondrocyte in cartilage matrix has rounded or polygonal structure. The exception occurs at tissue boundaries, for example the articular surfaces of joints, in which chondrocytes may be flattened or discoid. Intra-cellular features are characteristic of a synthetically active cell.
How is chondrogenic differentiation used in three dimensional pellets?
Chondrogenic Differentiation. Chondrogenic differentiation is most effective in three-dimensional micromass pellets cultured without FCS in the presence of dexamethasone (10−8M), ascorbic acid 2-phosphate (100µM), transforming growth factor-β (TGF-β) (10ngml−1), insulin (10µgml−1), transferrin (5.5µgml−1), and sodium selenite (5ngml−1).
How is chondrogenic differentiation of human mesenchymal stem cells?
High-density cell culture is pivotal for the chondrogenic differentiation of human mesenchymal stem cells (hMSCs). Two high-density cell culture systems, micromass and pellet culture, have been used to induce chondrogenic differentiation of hMSCs.
How are chondrogenic cells resuspended in culture?
The cells are then resuspended in complete chondrogenic media, comprising incomplete chondrogenic media supplemented with10 ng/mL of TGF-β3 and pelleted by centrifugation at 500 g for 8 min. The pellets are maintained in culture with 1 pellet/tube in 1 mL of complete medium.
Which is a potent inducer of chondrogenic differentiation?
Dexamethasone is a potent inducer of chondrogenic differentiation in human-derived MSCs (reviewed in Heng et al. 2004 ), possibly through dose-dependent increases of Sox9 ( Sekiya et al., 2001 ). For CD56 MDCs, a proliferation media was used that contained dexamethasone from the onset of culture, which may have promoted the differentiation pathway.
