Topic Guide
What Is Autoimmunity?
Autoimmunity is a subject covered in depth across 2 podcast episodes in our database. Below you'll find key concepts, expert insights, and the top episodes to listen to — all distilled from hours of conversation by leading experts.
Key Concepts in Autoimmunity
Car t-cells (chimeric antigen receptor t-cells)
CAR T-cells are a type of immunotherapy where a patient's own T-cells are genetically modified in a lab to express artificial receptors (Chimeric Antigen Receptors) on their surface. These engineered T-cells are then reinfused into the patient to specifically identify, search, and destroy cancer cells that express a particular antigen, offering a highly targeted treatment approach.
Crispr-cas9
CRISPR (Clustered Regularly Interspaced Short Palindromic Repeats) is a revolutionary gene-editing technology derived from a bacterial immune system. It uses a Cas9 protein (the 'scissor') guided by an RNA molecule to make precise cuts in specific DNA sequences. This allows scientists to remove, insert, or modify genes with high accuracy, enabling the reprogramming of cells for therapeutic purposes.
Immunotherapy / checkpoint inhibitors
Immunotherapy is a category of cancer treatment that boosts or restores the immune system's ability to fight cancer. Checkpoint inhibitors are a specific type of immunotherapy that block proteins (like PD1 or CTLA4) that act as 'brakes' on T-cells. By taking these brakes off, T-cells can become more active and effective at targeting and eliminating cancer cells.
Innate vs. adaptive immune system
The immune system is divided into two main components: the innate immune system, which provides a rapid, non-specific 'first alarm' response using cells like dendritic cells and macrophages, and the adaptive immune system, which offers a highly specific, long-lasting response through lymphocytes (B cells and T cells) that learn to recognize and target specific pathogens.
Mutagens & carcinogens
Mutagens are agents (like chemicals, radiation, or viruses) that cause changes (mutations) in the DNA sequence of a cell. Carcinogens are substances or agents that can cause cancer. While closely related, all carcinogens are typically mutagens, but not all mutagens necessarily lead directly to cancer; they increase the probability of accumulating cancer-causing mutations.
Lipid nanoparticles (lnps)
Lipid nanoparticles are tiny spherical vesicles made of lipids that are used as delivery systems for genetic material, such as mRNA or CRISPR components, into cells. They gained prominence with mRNA vaccines (like COVID-19 vaccines) and are now being engineered with targeting molecules to deliver genetic cargo to specific cell types or organs within the body without needing to remove cells.
What Experts Say About Autoimmunity
- 1.CAR T-cells represent a cutting-edge cancer treatment where T-cells are genetically engineered in a lab to target and destroy specific cancer cells, a technology that does not exist naturally.
- 2.The current era of biology is characterized by an unprecedented ability to intervene at the root causes of disease through gene editing technologies like CRISPR, lipid nanoparticles, and vaccines, allowing for the "programming" of cellular behavior.
- 3.The immune system's primary job is to distinguish between "self" and "non-self" to protect against infections, with the innate system acting as an early alarm and the adaptive system (T-cells and B-cells) providing fine-tuned, specific responses.
- 4.T-cells are "educated" in the thymus during childhood, undergoing selection processes to ensure they recognize foreign invaders while largely avoiding attacks on the body's own tissues.
- 5.Systemic health factors like diet significantly impact immune function; for instance, a high-fat diet can qualitatively alter inflammatory responses, potentially rendering standard allergy treatments ineffective.
- 6.Early life exposure to various elements is crucial for developing immune tolerance and can help prevent allergies, though this must be balanced against the risk of dangerous allergic reactions.