Summary
Innate receptors that detect conserved microbial patterns and trigger inflammatory signalling.
In depth
TLR4 detects bacterial LPS, TLR3 double-stranded RNA, TLR5 flagellin. Signal through MyD88 to NF-kB and interferon regulatory factors. Discovered in Drosophila by Hoffmann and in mammals by Beutler (Nobel 2011).
TLRs at the cell surface detect bacterial parts; endosomal ones detect nucleic acids. Their signalling induces cytokines and costimulatory molecules.
Remember: the innate system is not 'non-specific'; it recognises conserved patterns.
Frequently asked questions
What is Toll-Like Receptors?
Innate receptors that detect conserved microbial patterns and trigger inflammatory signalling.
Which area of biology covers Toll-Like Receptors, and how advanced is it?
Toll-Like Receptors is one of the 52 topics in Immunology & Disease. It is rated Advanced, so it suits learners who want specialist depth. Related topics in this area include Innate Immunity, Cytokines, Antibody Diversity.
Can you give an example of Toll-Like Receptors?
TLR agonists are used as vaccine adjuvants.
What should I learn before Toll-Like Receptors?
Work through the Beginner topics in Immunology & Disease first, such as Immune System, Viruses, Innate Immunity, then return to Toll-Like Receptors. Advanced topics assume the Intermediate vocabulary.
What topics are related to Toll-Like Receptors?
The closest topics to Toll-Like Receptors are Innate Immunity, Cytokines, Antibody Diversity, Innate Lymphoid Cells. Comparing them side by side is a good way to see how the ideas connect.
How can I check that I understand Toll-Like Receptors?
Read the summary and the in-depth section, then use the quick check on the interactive lesson for Toll-Like Receptors. To practise the whole of Immunology & Disease, use the Immunology & Disease quiz.
How is Toll-Like Receptors different from Innate Immunity?
Toll-Like Receptors: Innate receptors that detect conserved microbial patterns and trigger inflammatory signalling. Innate Immunity: Rapid, non-specific defences such as skin, mucus, phagocytes and inflammation. Read both side by side and note what each one explains.
How should I study Toll-Like Receptors step by step?
First, read the summary and write the definition in your own words. Second, read the in-depth section and note any example. Third, compare it with Innate Immunity and explain the difference aloud. Finally, take the Immunology & Disease quiz and come back to this page for any question you miss.