chemistry

Tirbanibulin

Tirbanibulin 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 Tirbanibulin rather than just read about it. In short: Tirbanibulin, sold under the brand name Klisyri, is a medication used for the treatment of actinic keratosis (AK) on the face or scalp. It functions by inhibiting both tubulin polymerization and Src kinase signaling.

Key takeaways

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

Reference excerpt

Tirbanibulin, sold under the brand name Klisyri, is a medication used for the treatment of actinic keratosis (AK) on the face or scalp. It functions by inhibiting both tubulin polymerization and Src kinase signaling. It is potentially effective in impeding the development of squamous cell carcinoma in situ. The most common side effects include local skin reactions, application site pruritus, and application site pain. Tirbanibulin was approved for medical use in the United States in December 2020, and in the European Union in July 2021. The US Food and Drug Administration (FDA) considers it to be a first-in-class medication.

Medical uses Tirbanibulin is indicated for the topical treatment of actinic keratosis of the face or scalp.

Mechanism of Action Tirbanibulin, chemically known as N-benzyl-2-(5-(4-(2-morpholinoethoxy)phenyl) pyridine-2-yl) acetamide, is a microtubule and non–ATP-competitive inhibitor. The drug in various ways mimics the mechanisms of chemotherapy by suspending the protooncogenic Src tyrosine kinase signaling pathway. Notably, it promotes G2/M arrest during cell cycle, upregulates p53, and triggers apoptosis via caspase-3 stimulation and poly (ADP-ribose) polymerase cleavage.

Side effects In several studies tirbanibulin has been observed to induce skin reactions at the site of application, ranging from mild to severe erythema, flaking, ulceration, and pain. Extensive research has not been conducted on the risks of tirbanibulin usage by specific human populations (i.e., pregnant populations). Significant differences have not been observed in the safety or effectiveness of tirbanibulin between geriatric or pediatric populations.

History The US Food and Drug Administration (FDA) approved tirbanibulin based on evidence from two clinical trials (Trial 1/ NCT03285477 and Trial 2/NCT03285490) of 702 adults with actinic keratosis on the face or scalp. The trials were conducted at 62 sites in the United States. Participants received once daily treatment with either tirbanibulin or inactive control ointment for 5 consecutive days to the single predetermined area where they had actinic keratosis. Neither the participants nor the health care providers knew which treatment was being given until after the trial was completed. The benefit of tirbanibulin in comparison to control was assessed after 57 days by comparing the percentage of participants who did not have any actinic keratosis on the treatment area (100% clearance).

Society and culture

Legal status In May 2021, the Committee for Medicinal Products for Human Use (CHMP) of the European Medicines Agency (EMA) adopted a positive opinion, recommending the granting of a marketing authorization for tirbanibulin, intended for the treatment of actinic keratosis. The applicant for this medicinal product is Almirall, S.A. Tirbanibulin was approved for medical use in the European Union in July 2021.

References

External links Clinical trial number NCT03285477 for "A Multi-Center Study to Evaluate the Efficacy and Safety of KX2-391 Ointment 1% on AK on Face or Scalp (AK003)" at ClinicalTrials.gov Clinical trial number NCT03285490 for "A Multi-Center Study to Evaluate the Efficacy and Safety of KX2-391 Ointment 1% on AK on Face or Scalp (AK004)" at ClinicalTrials.gov

Illustrations

Worked examples

Example 1 — a first encounter with Tirbanibulin

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

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

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

Frequently asked questions

What is Tirbanibulin in simple terms?

Why does Tirbanibulin 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 Tirbanibulin?

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 Tirbanibulin.