biology

TNF receptor associated periodic syndrome

TNF receptor associated periodic syndrome 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 TNF receptor associated periodic syndrome rather than just read about it. In short: TNF receptor associated periodic syndrome (TRAPS) is a periodic fever syndrome associated with mutations in a receptor for the molecule tumor necrosis factor (TNF) that is inheritable in an autosomal dominant manner. Individuals with TRAPS have episodic symptoms such as recurrent high fevers, rash, abdominal pain, joint/muscle aches and puffy eyes.

Key takeaways

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

Reference excerpt

TNF receptor associated periodic syndrome (TRAPS) is a periodic fever syndrome associated with mutations in a receptor for the molecule tumor necrosis factor (TNF) that is inheritable in an autosomal dominant manner. Individuals with TRAPS have episodic symptoms such as recurrent high fevers, rash, abdominal pain, joint/muscle aches and puffy eyes.

Symptoms and signs TNF receptor associated periodic syndrome presents with the following signs and symptoms:

Episodic fever Elevated erythrocyte sedimentation rate Pericarditis Splenomegaly Uveitis Vertigo AA amyloidosis

Cause TNF receptor associated periodic syndrome is autosomal dominant, and about 70 mutations of the TNFRSF1A gene have been linked to this condition. Its cytogenetic location is at 12p13.31.

Mechanism

The main source of TNF (tumor necrosis factor) are cells in the immune system called macrophages which produce it in response to infection and other stimuli. TNF helps activate other immune cells and plays a major role in initiation of inflammation. Individuals with TRAPS have a mutation in the tumor necrosis factor receptor-1 (TNFR1) gene; the mechanisms by which mutations in TNFR1 lead to the TRAPS phenotype are still unknown. Impaired shedding of the TNF receptor is one of the possible defects, most mutations affect the extracellular domain of the receptor, some also the cleavage site.

Diagnosis The diagnosis of TRAPS may show an increased IgD level in a possibly affected individual, other methods to ascertain a definite finding is via the following:

Blood test Genetic test Clinical evaluation

Treatment

In terms of treatment for TNF receptor associated periodic syndrome, corticosteroids can be administered for the reduction of the severity of this condition, NSAIDS may be used for fever.

Research Several medications have been studied for the treatment of TNF receptor associated periodic syndrome including etanercept, infliximab, and anakinra.

See also List of cutaneous conditions TNFRSF1A

References

Further reading Kimberley, Fiona C; Lobito, Adrian A; Siegel, Richard M; Screaton, Gavin R (2007). "Falling into TRAPS – receptor misfolding in the TNF receptor 1-associated periodic fever syndrome". Arthritis Research & Therapy. 9 (4): 217. doi:10.1186/ar2197. ISSN 1478-6354. PMC 2206363. PMID 17666110.

External links PubMed

Illustrations

Worked examples

Example 1 — a first encounter with TNF receptor associated periodic syndrome

Start with the simplest possible case. Write down what TNF receptor associated periodic syndrome 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 TNF receptor associated periodic syndrome 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 TNF receptor associated periodic syndrome 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 TNF receptor associated periodic syndrome

In research: TNF receptor associated periodic syndrome 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 TNF receptor associated periodic syndrome 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: TNF receptor associated periodic syndrome is common in secondary-school and first-year university syllabi. It links to neighbouring topics Autoinflammatory syndromes, Rare diseases, Rheumatology, so understanding it makes those chapters shorter.
In everyday life: Look for TNF receptor associated periodic syndrome 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.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “TNF receptor associated periodic syndrome” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study TNF receptor associated periodic syndrome in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what TNF receptor associated periodic syndrome 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 TNF receptor associated periodic syndrome out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is TNF receptor associated periodic syndrome in simple terms?

Why does TNF receptor associated periodic syndrome 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 TNF receptor associated periodic syndrome?

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 TNF receptor associated periodic syndrome.