science

Triapine

Triapine is a science 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 Triapine rather than just read about it. In short: Triapine (also known as 3-aminopyridine-2-carboxaldehyde thiosemicarbazone or 3-AP) is an investigational drug that is being evaluated for the treatment of cancer. It is a thiosemicarbazone derivative of 3-aminopyridine-2-carboxaldehyde.

Key takeaways

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

Reference excerpt

Triapine (also known as 3-aminopyridine-2-carboxaldehyde thiosemicarbazone or 3-AP) is an investigational drug that is being evaluated for the treatment of cancer. It is a thiosemicarbazone derivative of 3-aminopyridine-2-carboxaldehyde. It presents an N-N-S array of donor sites that strongly bind iron, robbing iron-containing enzymes of their prosthetic group. It belongs to the family of drugs called ribonucleotide reductase inhibitors.

Pharmacology 3AP is a potent inhibitor of ribonucleotide reductase, the rate determining enzyme in the supply of deoxynucleotides (DNA building blocks) for DNA synthesis. DNA synthesis is required for cellular proliferation and DNA repair. It is a very strong iron chelator and in the body it is likely that the iron chelate is the active species that quenches the active site tyrosyl radical required by ribonucleotide reductase for its enzymatic activity. The 3AP iron chelate is redox active and there have been several reports in the literature ascribing this property to some of the biological activities of 3AP. 3AP was chosen, based on the results of studying and the screening these products, as the candidate inhibitor most likely to express activity in the setting of human neoplastic disease. Vion Pharmaceuticals has also filed several use patents concerning the antiviral and antifungal activity of 3AP. It has also been reported to have neuroprotective properties.

Development 3AP was initially developed by Vion Pharmaceuticals until the company declared bankruptcy in December 2009. Nanotherapeutics, Inc. acquired the product from bankruptcy in 2010 and supported trials at NCI until 2018 when the product was transferred to Nanoshift, LLC. Nanoshift LLC and Nanopharmaceutics, Inc. continue to support clinical studies with the NCI.

References

External links Clinical trial number NCT02466971 for "Testing the Addition of a New Anti-Cancer Drug, Triapine, to the Usual Chemotherapy Treatment (Cisplatin) During Radiation Therapy for Advanced-stage Cervical and Vaginal Cancers" at ClinicalTrials.gov Clinical trial number NCT02595879 for "Triapine With Chemotherapy and Radiation Therapy in Treating Patients With IB2-IVA Cervical or Vaginal Cancer" at ClinicalTrials.gov Clinical trial number NCT02466971 for "Testing the Addition of an Anti-cancer Drug, Triapine, to the Usual Radiation-Based Treatment (Lutetium Lu 177 Dotatate) for Neuroendocrine Tumors" at ClinicalTrials.gov Clinical trial number NCT04494113 for "Testing the Response to the Anti-cancer Drug, Triapine, in Uterine Cancers Using Markers From the Tissue at the Time of Hysterectomy" at ClinicalTrials.gov

Illustrations

Worked examples

Example 1 — a first encounter with Triapine

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

In research: Triapine appears in science 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 Triapine 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: Triapine is common in secondary-school and first-year university syllabi. It links to neighbouring topics 3-Aminopyridines, Experimental cancer drugs, Thiosemicarbazones, so understanding it makes those chapters shorter.
In everyday life: Look for Triapine 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.

Affiliate

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

How to study Triapine in 20 minutes

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

Frequently asked questions

What is Triapine in simple terms?

Why does Triapine matter?

Because it connects several science 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 Triapine?

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 Triapine.