39.11
Stamcelcultuur
Stamcelonderzoek heeft tot doel manieren te vinden om stamcellen te gebruiken om cellulaire schade te regenereren en te herstellen. Na verloop van tij…
Stem cell culture is the process of growing stem cells in vitro under optimal conditions.
Stem cells have a wide range of medical applications like tissue and organ regeneration.
Stem cell samples are usually extracted from adult or embryonic tissues.
These samples are then transferred to plastic culture dishes coated with a feeder layer consisting of inactivated mouse embryonic fibroblast cells, which provide necessary intercellular interactions and nutrients; and prevent the spontaneous differentiation of stem cells.
The culture dish is supplemented with media primarily containing growth hormones and essential nutrients. It nourishes stem cells to divide and spread over the culture dish, forming colonies.
Once grown to the required size, these colonies are removed gently and subjected to the passage, where they are further replated or subcultured multiple times to establish a pure and continuously growing cell line.
An established cell line can give rise to millions of stem cells in vitro. So, a batch of these cultured stem cells can be frozen for future use.
View the full transcript and gain access to JoVE Core videos
Q1: What is the purpose of a feeder layer in stem cell culture?
A feeder layer consists of inactivated mouse embryonic fibroblast cells that provide necessary intercellular interactions and nutrients to cultured stem cells. This layer prevents spontaneous differentiation, allowing stem cells to maintain their undifferentiated state while dividing and spreading across the culture dish to form colonies.
Q2: How are stem cell colonies established into a continuous cell line?
Once stem cell colonies grow to the required size, they are removed gently and subjected to passage, where they are replated or subcultured multiple times. This process establishes a pure and continuously growing cell line capable of generating millions of stem cells in vitro for research and therapeutic applications.
Q3: What are the main sources of stem cells used in laboratory research?
Stem cells are extracted from adult tissues, embryonic tissues, umbilical cord blood, and deciduous teeth. Adult stem cells are multipotent and limited to differentiating into cell types found in their tissue of origin, while embryonic stem cells are pluripotent with broader differentiation potential.
Q4: Why are induced pluripotent stem cells considered advantageous for therapy?
Induced pluripotent stem cells (iPSCs) are genetically reprogrammed adult cells that function like embryonic stem cells, capable of generating cells from all three germ layers. They avoid the legal, ethical, and immunological problems associated with embryonic stem cells, making them a promising advance for cell-based therapy applications.
Q5: What media components support stem cell growth in culture?
Culture media is supplemented with growth hormones and essential nutrients that nourish stem cells, enabling them to divide and spread across the culture dish. These components maintain optimal conditions for stem cell proliferation and colony formation in vitro for extended periods.
Q6: How can cultured stem cells be preserved for future use?
Once an established cell line is generated, batches of cultured stem cells can be frozen for future use. This preservation method allows researchers and clinicians to maintain viable stem cell populations without continuous culture, supporting long-term storage for regenerative medicine applications.
Q7: What challenges must be overcome for clinical stem cell therapy?
Embryonic stem cells may trigger immune rejection because the patient's body recognizes them as foreign, and their isolation raises ethical concerns. Adult stem cells avoid immunological issues but have limited differentiation potential, requiring researchers to balance therapeutic capability with safety and ethical considerations.