science

Imlifidase

Imlifidase 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 Imlifidase rather than just read about it. In short: Imlifidase, brand name Idefirix, is a medication for the desensitization of highly sensitized adults needing kidney transplantation, but unlikely to receive a compatible transplant. Imlifidase is a cysteine protease derived from the immunoglobulin G (IgG)‑degrading enzyme of Streptococcus pyogenes.

Key takeaways

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

Reference excerpt

Imlifidase, brand name Idefirix, is a medication for the desensitization of highly sensitized adults needing kidney transplantation, but unlikely to receive a compatible transplant. Imlifidase is a cysteine protease derived from the immunoglobulin G (IgG)‑degrading enzyme of Streptococcus pyogenes. It cleaves the heavy chains of all human IgG subclasses (but no other immunoglobulins), eliminating Fc-dependent effector functions, including CDC and antibody-dependent cell-mediated cytotoxicity (ADCC). Thus, imlifidase reduces the level of donor specific antibodies, enabling transplantation. The benefits with imlifidase are its ability to convert a positive crossmatch to a negative one in highly sensitized people to allow renal transplantation. The most common side effects are infections and infusion related reactions. Imlifidase was approved for medical use in the European Union in August 2020.

Medical uses Imlifidase is indicated for desensitization treatment of highly sensitized adult kidney transplant people with positive crossmatch against an available deceased donor. The use of imlifidase should be reserved for people unlikely to be transplanted under the available kidney allocation system including prioritization programs for highly sensitized people.

History Imlifidase was granted orphan drug designations by the European Commission in January 2017, and November 2018, and by the U.S. Food and Drug Administration (FDA) in both February and July 2018. In February 2019, Hansa Medical AB changed its name to Hansa Biopharma AB.

References

Further reading Ge S, Chu M, Choi J, Louie S, Vo A, Jordan SC, et al. (October 2019). "Imlifidase Inhibits HLA Antibody-Mediated NK Cell Activation and Antibody-Dependent Cell-Mediated Cytotoxicity (ADCC) In Vitro". Transplantation. 104 (8): 1574–1579. doi:10.1097/TP.0000000000003023. PMID 31644495. S2CID 204865743.{{cite journal}}: CS1 maint: overridden setting (link) Lin J, Boon L, Bockermann R, Robertson AK, Kjellman C, Anderson CC (March 2020). "Desensitization using imlifidase and EndoS enables chimerism induction in allosensitized recipient mice". Am. J. Transplant. 20 (9): 2356–2365. doi:10.1111/ajt.15851. PMC 7496317. PMID 32185855. Lonze BE, Tatapudi VS, Weldon EP, Min ES, Ali NM, Deterville CL, et al. (September 2018). "IdeS (Imlifidase): A Novel Agent That Cleaves Human IgG and Permits Successful Kidney Transplantation Across High-strength Donor-specific Antibody". Ann. Surg. 268 (3): 488–496. doi:10.1097/SLA.0000000000002924. PMID 30004918. S2CID 51624972.{{cite journal}}: CS1 maint: overridden setting (link) Lorant T, Bengtsson M, Eich T, Eriksson BM, Winstedt L, Järnum S, et al. (November 2018). "Safety, immunogenicity, pharmacokinetics, and efficacy of degradation of anti-HLA antibodies by IdeS (imlifidase) in chronic kidney disease patients". Am. J. Transplant. 18 (11): 2752–2762. doi:10.1111/ajt.14733. PMC 6221156. PMID 29561066.{{cite journal}}: CS1 maint: overridden setting (link)

Worked examples

Example 1 — a first encounter with Imlifidase

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

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

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

Frequently asked questions

What is Imlifidase in simple terms?

Why does Imlifidase 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 Imlifidase?

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 Imlifidase.