chemistry

Pravadoline

Pravadoline 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 Pravadoline rather than just read about it. In short: Pravadoline (WIN 48,098) is an anti-inflammatory and analgesic drug with an IC50 of 4.9 μM and a Ki of 2511 nM at CB1, related in structure to nonsteroidal anti-inflammatory drugs (NSAIDs) such as indometacin. It was developed in the 1980s as a new antiinflammatory and prostaglandin synthesis inhibitor, acting through inhibition of the enzyme cyclooxygenase (COX).

Key takeaways

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

Reference excerpt

Pravadoline (WIN 48,098) is an anti-inflammatory and analgesic drug with an IC50 of 4.9 μM and a Ki of 2511 nM at CB1, related in structure to nonsteroidal anti-inflammatory drugs (NSAIDs) such as indometacin. It was developed in the 1980s as a new antiinflammatory and prostaglandin synthesis inhibitor, acting through inhibition of the enzyme cyclooxygenase (COX). However, pravadoline was found to exhibit unexpectedly strong analgesic effects, which appeared at doses ten times smaller than the effective anti-inflammatory dose and so could not be explained by its action as a COX inhibitor. These effects were not blocked by opioid antagonists such as naloxone, and it was eventually discovered that pravadoline represented the first compound from a novel class of synthetic cannabinoids, the aminoalkylindoles. Pravadoline was never developed for use as an analgesic, partly due to toxicity concerns (although these were later shown to be a result of the salt form that the drug had been prepared in rather than from the pravadoline itself), however the discovery of cannabinoid activity in this structurally novel family of drugs led to the discovery of several new cannabinoid agonists, including the drug WIN 55,212-2, which is now widely used in scientific research.

Animal studies Administration of pravadoline on rats showed:

Prolonged the response latency induced by tail immersion in hot water at a temperature of 55 °C (minimum effective dose 100 mg/kg s.c.) Prevented hyperalgesia in rats with brewer's yeast injections during (Randall-Selitto test) (minimum effective dose 1 mg/kg, p.o.) Prevented the nociceptive response induced by paw flexion in the adjuvant-arthritic rat (ED50 41 mg/kg, p.o.) Prevented the nociceptive response of bradykinin-induced head and forepaw flexion (ED50 78 mg/kg, p.o.) The antinociceptive activity of pravadoline cannot be explained by an opioid mechanism, because pravadoline-induced antinociception was not antagonized by naloxone (1 mg/kg, s.c.) and pravadoline did not bind to the opioid receptors at concentrations up to 10 μM.

See also AM-630 (6-iodopravadoline) WIN 54,461 (6-bromopravadoline) WIN 55,212-2 RCS-4 (1-pentyl-3-(4-methoxybenzoyl)indole)

References

Illustrations

Worked examples

Example 1 — a first encounter with Pravadoline

Start with the simplest possible case. Write down what Pravadoline 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 Pravadoline 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 Pravadoline 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 Pravadoline

In research: Pravadoline 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 Pravadoline 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: Pravadoline is common in secondary-school and first-year university syllabi. It links to neighbouring topics 4-Methoxyphenyl compounds, 4-Morpholinyl compounds, Aminoalkylindoles, so understanding it makes those chapters shorter.
In everyday life: Look for Pravadoline 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 Pravadoline in 20 minutes

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

Frequently asked questions

What is Pravadoline in simple terms?

Why does Pravadoline 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 Pravadoline?

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 Pravadoline.