chemistry

OSU-03012

OSU-03012 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 OSU-03012 rather than just read about it. In short: OSU-03012 (AR-12) is a celecoxib derivative with anticancer and anti-microbial activity. Unlike celecoxib, OSU-03012 does not inhibit COX, but inhibits several other important enzymes instead which may be useful in the treatment of some forms of cancer.

Key takeaways

OSU-03012 belongs to chemistry; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect OSU-03012 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of OSU-03012 from memory before moving on to harder problems.

Reference excerpt

OSU-03012 (AR-12) is a celecoxib derivative with anticancer and anti-microbial activity. Unlike celecoxib, OSU-03012 does not inhibit COX, but inhibits several other important enzymes instead which may be useful in the treatment of some forms of cancer. When combined with PDE5 inhibitors such as sildenafil or tadalafil, OSU-03012 was found to show enhanced anti-tumour effects in cell culture. OSU-03012 has been shown to inhibit completely vaccinia virus in cell based assay.

Antimicrobial agent Antifungal activity against Candida albicans, non-albicans Candida spp., Cryptococcus neoformans, Blastomyces dermatitidis, Histoplasma, and Coccidioides via disruption of phosphoinositide-dependent kinase-1 and inhibition of acetyl—CoA synthetase activity. Activity was enhanced with fluconazole co-delivery. Antiparasitic activity against Leishmania donovani. Antibacterial activity against Salmonella enterica, and Francisella tularensis. OSU-03012 has also illustrated sensitization of intracellular Salmonella enterica to aminoglycosides. Antiviral when combined with PDE5 inhibitors such as sildenafil or tadalafil against a wide variety of organisms including Lassa virus, Marburg virus, and Ebola virus. This activity thought to be mediated via inhibition of the chaperone protein BiP. Antimicrobial activity is often not against the microbe directly (like conventional antibiotics), but rather host-directed activity that works on the cellular host to disrupt the pathogen within the cell. Since the median lethal dose (LD50), in vitro, against macrophages is ~7 μM and near its effective concentration (EC50) formulation of the compound has been shown to enhances its activity. For example, encapsulation of OSU-03012 into biodegradable polymeric (Acetalated dextran) micro/nanoparticles significantly reduces cytotoxicity, increases drug concentration per a cell, reduces toxicity in vivo, and facilitates needle-free delivery in vivo.

Orphan drug designation The European Commission has designated OSU-03012 as an orphan drug for use in combination with other drugs for treatment of two infections diseases, cryptococcosis and tularaemia. OSU-03012 received an orphan drug designation in combination with the antifungal drug fluconazole for cryptococcosis of the brain. It also received this designation for tularaemia in combination with the antibacterial drug gentamicin.

References

Illustrations

Worked examples

Example 1 — a first encounter with OSU-03012

Start with the simplest possible case. Write down what OSU-03012 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 OSU-03012 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 OSU-03012 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 OSU-03012

In research: OSU-03012 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 OSU-03012 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: OSU-03012 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Antineoplastic drugs, Phenanthrenes, Pyrazoles, so understanding it makes those chapters shorter.
In everyday life: Look for OSU-03012 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 OSU-03012 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what OSU-03012 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 OSU-03012 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is OSU-03012 in simple terms?

Why does OSU-03012 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 OSU-03012?

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 OSU-03012.