chemistry

UM171

UM171 is a chemistry 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 UM171 rather than just read about it. In short: UM171 is a small molecule that was initially developed to facilitate the ex vivo expansion of hematopoietic stem and progenitor cells (HSPCs), but is now also being evaluated for potential anti-cancer activity. UM171 was first identified in 2014 during a chemical screening campaign aimed at finding compounds that promote the ex vivo expansion of HSPCs.

Key takeaways

UM171 belongs to chemistry; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect UM171 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of UM171 from memory before moving on to harder problems.

Reference excerpt

UM171 is a small molecule that was initially developed to facilitate the ex vivo expansion of hematopoietic stem and progenitor cells (HSPCs), but is now also being evaluated for potential anti-cancer activity. UM171 was first identified in 2014 during a chemical screening campaign aimed at finding compounds that promote the ex vivo expansion of HSPCs. It was shown to markedly increase the number of transplantable stem cells derived from cord blood, which led to rapid preclinical and clinical testing in the context of hematopoietic stem cell transplantation. More recently, UM171 has been investigated for its potential in cancer therapy. Since suppression of LSD1 activity has emerged as a promising strategy in oncology, UM171—which promotes the ubiquitin-dependent proteasomal degradation of the LSD1–CoREST complex—has shown anti-cancer effects in preclinical studies. Mechanistic studies have shown that UM171 targets HDAC1 and HDAC2 within the LSD1/CoREST complex for degradation. Acting as a molecular glue, UM171 promotes the interaction of the CUL3–KBTBD4 E3 ligase with HDAC1/2, leading to their ubiquitination and selective degradation. This, in turn, destabilizes HDAC1/2-containing corepressors such as CoREST and MIER1. Although LSD1 and CoREST are also degraded, these effects occur secondarily and more slowly compared to the direct depletion of HDAC1/2.

References

Illustrations

Worked examples

Example 1 — a first encounter with UM171

Start with the simplest possible case. Write down what UM171 claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In chemistry, 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 UM171 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 UM171 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 UM171

In research: UM171 appears in chemistry 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 UM171 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: UM171 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Amines, Benzyl compounds, Cyclohexanes, so understanding it makes those chapters shorter.
In everyday life: Look for UM171 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 UM171 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what UM171 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 UM171 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is UM171 in simple terms?

Why does UM171 matter?

Because it connects several chemistry 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 UM171?

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 UM171.