biology

Interleukin-1 receptor antagonist

Interleukin-1 receptor antagonist is a biology topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Interleukin-1 receptor antagonist rather than just read about it. In short: The interleukin-1 receptor antagonist (IL-1RA) is a protein that in humans is encoded by the IL1RN gene. IL-1RA was initially called the IL-1 inhibitor and was discovered separately in 1984 by two independent laboratories.

Key takeaways

Interleukin-1 receptor antagonist belongs to biology; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Interleukin-1 receptor antagonist to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Interleukin-1 receptor antagonist from memory before moving on to harder problems.

Reference excerpt

The interleukin-1 receptor antagonist (IL-1RA) is a protein that in humans is encoded by the IL1RN gene. IL-1RA was initially called the IL-1 inhibitor and was discovered separately in 1984 by two independent laboratories. IL-1RA is an agent that binds non-productively to the cell surface interleukin-1 receptor (IL-1R), the same receptor that binds interleukin 1 family (IL-1), preventing IL-1's from sending a signal to that cell.

Function IL-1RA is a member of the interleukin 1 cytokine family. IL-1RA is secreted by various types of cells including immune cells, epithelial cells, and adipocytes, and is a natural inhibitor of the pro-inflammatory effect of IL1β. This protein inhibits the activities of interleukin 1, alpha (IL1A) and interleukin 1, beta (IL1B), and modulates a variety of interleukin 1 related immune and inflammatory responses. This gene and five other closely related cytokine genes form a gene cluster spanning approximately 400 kb on chromosome 2. Four alternatively spliced transcript variants encoding distinct isoforms have been reported.

Clinical significance A polymorphism of this gene is reported to be associated with increased risk of osteoporotic fractures and gastric cancer. Biallelic deleterious mutations in the IL1RN gene results in a rare autoinflammatory disease called deficiency of the interleukin-1–receptor antagonist (DIRA). Variants of the IL1RN gene is also associated with risk of schizophrenia. Elevated levels of IL-1RA has been found in serum of schizophrenia patients. In treatment of temporomandibular joint osteoarthritis (TMJOA) the messenger RNA (mRNA) of IL-1RA can be used. The IL-1RA mRNA reduces pain and joint inflammation by blocking inflammatory cascade signals that lead to osteoarthritis progression. A recombinant, slightly modified version of interleukin 1 receptor antagonist called anakinra is used in the treatment of rheumatoid arthritis, an autoimmune disease in which IL-1 plays a key role. Anakinra differs from native human IL-1RA in that it has the addition of a single methionine residue at its amino terminus The cytoplasmic and secreted isoforms of IL-1RA can suppress tumors such as squamous cell carcinoma. The cytoplasmic isoform can protect epithelial cells from environmental factors and compete with IL1A in binding with receptors preventing activation. Then, the secreted isoform regulates IL1B in tumor microenvironments by inhibiting glycolysis of IL1B and proliferation of tumor cells, thus preventing the movement of tumor cells.

Use in horses Interleukin 1 receptor antagonist is used in horses for the treatment of equine lameness secondary to joint and soft-tissue injury. IL-1RA obstructs the IL1B inflammatory cascade rather than helping to restore damaged tissue.

References

Illustrations

Worked examples

Example 1 — a first encounter with Interleukin-1 receptor antagonist

Start with the simplest possible case. Write down what Interleukin-1 receptor antagonist claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In biology, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Interleukin-1 receptor antagonist before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Interleukin-1 receptor antagonist ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Interleukin-1 receptor antagonist

In research: Interleukin-1 receptor antagonist appears in biology research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Interleukin-1 receptor antagonist in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Interleukin-1 receptor antagonist is common in secondary-school and first-year university syllabi. It links to neighbouring topics Cytokines, Genes on human chromosome 2, so understanding it makes those chapters shorter.
In everyday life: Look for Interleukin-1 receptor antagonist outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Interleukin-1 receptor antagonist in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Interleukin-1 receptor antagonist means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Interleukin-1 receptor antagonist out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Interleukin-1 receptor antagonist in simple terms?

Why does Interleukin-1 receptor antagonist matter?

Because it connects several biology ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Interleukin-1 receptor antagonist?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Interleukin-1 receptor antagonist.