(Heavy chain)
EVQLVQSGAE VKKPGESLKI SCKGSGYIFT NYWIAWVRQM PGKGLESMGI IYPGDSDIRY
SPSFQGQVTI SADKSITTAY LQWSSLKASD TAMYYCARHD IEGFDYWGRG TLVTVSSAST
KGPSVFPLAP SSKSTSGGTA ALGCLVKDYF PEPVTVSWNS GALTSGVHTF PAVLQSSGLY
SLSSVVTVPS SSLGTQTYIC NVNHKPSNTK VDKRVEPKSC DKTHTCPPCP APEFEGGPSV
FLFPPKPKDT LMISRTPEVT CVVVDVSHED PEVKFNWYVD GVEVHNAKTK PREEQYNSTY
RVVSVLTVLH QDWLNGKEYK CKVSNKALPA SIEKTISKAK GQPREPQVYT LPPSREEMTK
NQVSLTCLVK GFYPSDIAVE WESNGQPENN YKTTPPVLDS DGSFFLYSKL TVDKSRWQQG
NVFSCSVMHE ALHNHYTQKS LSLSPGK
(Lihgt chain)
EIVLTQSPGT LSLSPGERAT LSCRASQSVS SSFFAWYQQK PGQAPRLLIY GASSRATGIP
DRLSGSGSGT DFTLTITRLE PEDFAVYYCQ QYDSSAITFG QGTRLEIKRT VAAPSVFIFP
PSDEQLKSGT ASVVCLLNNF YPREAKVQWK VDNALQSGNS QESVTEQDSK DSTYSLSSTL
TLSKADYEKH KVYACEVTHQ GLSSPVTKSF NRGEC
(Disulfide bridge: H22-96, H144-H200, H220-L215, H226-H’226, H229-H’229, H261-H321, H367-H425, H’22-H’96, H’144-H’200, H’220-L’215, H’261-H’321, H’367-H’425, L23-L89, L135-L195, L’23-L’89, L’135-L’195)

Anifrolumab

FDA APPROVED 2021/7/30, Saphnelo

• MEDI 546

Monoclonal antibody

Treatment of systemic lupus erythematosus (SLE)

• OriginatorMedarex
• DeveloperAstraZeneca; Medarex; MedImmune
• ClassAntirheumatics; Monoclonal antibodies; Skin disorder therapies
• Mechanism of ActionInterferon alpha beta receptor antagonists

• RegisteredSystemic lupus erythematosus
• Phase IILupus nephritis
• DiscontinuedRheumatoid arthritis; Scleroderma

• 02 Jul 2021Phase-III clinical trials in Systemic lupus erythematosus in USA (SC) (NCT04877691)
• 25 Jun 2021AstraZeneca plans a phase III trial in Systemic lupus erythematosus (Adjunctive treatment) in the China, Hong Kong, South Korea, Philipines, Taiwan and Thailand (IV, Infusion), in July 2021 (NCT04931563)
• 02 Jun 2021Pharmacokinetic, efficacy and adverse events data from a phase II TULIP-LN1 trial in Lupus nephritis presented at the 22nd Annual Congress of the European League Against Rheumatism (EULAR-2021)

Anifrolumab, sold under the brand name Saphnelo, is a monoclonal antibody used for the treatment of systemic lupus erythematosus (SLE).^[1][2] It binds to the type I interferon receptor, blocking the activity of type I interferons such as interferon-α and interferon-β.^{[medical citation needed]}

Anifrolumab was approved for medical use in the United States in August 2021.^[1][3][4][5]

Anifrolumab is a monoclonal antibody that inhibits type 1 interferon receptors, indicated in the treatment of moderate to severe systemic lupus erythematosus.

Anifrolumab, or MEDI-546, is a type 1 interferon receptor (IFNAR) inhibiting IgG1κ monoclonal antibody indicated in the treatment of adults with moderate to severe systemic lupus erythematosus.^7,11 The standard therapy for systemic lupus erythematosus consists of antimalarials like hydroxychloroquine, glucocorticoids like dexamethasone, and disease modifying antirheumatic drugs like methotrexate.^8,11

Three monoclonal antibodies (anifrolumab, rontalizumab, and sifalimumab) that target the type 1 interferon pathway entered clinical trials as potential treatments for systemic lupus erythematosus, but so far only anifrolumab has been approved.³

The design of early clinical trials of anti-interferon treatments such as anifrolumab, rontalizumab, and sifalimumab have come under criticism.³ The design of the clinical trials use different definitions of autoantibody positivity, making comparison between trials difficult; all trials involve large portions of patients also using corticosteroids, which may alter patient responses in the experimental and placebo groups; and patient populations were largely homogenous, which may have increased the odds of success of the trial.³

Anifrolumab has also been investigated for the treatment of Scleroderma.¹

Anifrolumab was granted FDA approval on 30 July 2021.¹¹

Adverse effects

The most common adverse effect was shingles, which occurred in 5% of patients in the low-dose group, to 10% in the high-dose group, and to 2% in the placebo group. Overall adverse effect rates were comparable in all groups.^[6]

History

The drug was developed by MedImmune, a unit of AstraZeneca, which chose to move anifrolumab instead of sifalimumab into phase III trials for lupus in 2015.^[7][8][9]

Clinical trial results

Anifrolumab failed to meet its endpoint of significant reduction in disease as assessed by the SLE Responder Index 4 instrument in the TULIP 1 phase III trial.^[10] This multi-center, double-blind, placebo-controlled study followed adults with moderate to severe SLE over the course of one year. Preliminary results were announced on 31 August 2018.

Names

Anifrolumab is the international nonproprietary name (INN).^[11]

References

1. ^ Jump up to:^a b chttps://www.accessdata.fda.gov/drugsatfda_docs/label/2021/761123s000lbl.pdf
2. ^ Statement On A Nonproprietary Name Adopted By The USAN Council – Anifrolumab, American Medical Association.
3. ^https://www.accessdata.fda.gov/drugsatfda_docs/appletter/2021/761123Orig1s000ltr.pdf
4. ^ https://www.astrazeneca.com/media-centre/press-releases/2021/saphnelo-approved-in-the-us-for-sle.html
5. ^ “Saphnelo (anifrolumab) Approved in the US for Moderate to Severe Systemic Lupus Erythematosus” (Press release). AstraZeneca. 2 August 2021. Retrieved 2 August 2021 – via Business Wire.
6. ^ Spreitzer H (29 August 2016). “Neue Wirkstoffe – Anifrolumab”. Österreichische Apothekerzeitung (in German) (18/2016).
7. ^ “Press release: New Hope for Lupus Patients”. MedImmune. 11 August 2015. Archived from the original on 31 July 2017.
8. ^ “Anifrolumab”. NHS Specialist Pharmacy Service. Retrieved 31 July 2017.
9. ^ “Anifrolumab”. AdisInsight. Retrieved 31 July 2017.
10. ^ “Update on TULIP 1 Phase III trial for anifrolumab in systemic lupus erythematosus”. http://www.astrazeneca.com. Retrieved 2019-02-05.
11. ^ World Health Organization (2014). “International nonproprietary names for pharmaceutical substances (INN): recommended INN: list 71”. WHO Drug Information. 28 (1). hdl:10665/331151.

Further reading

• Anderson E, Furie R (April 2020). “Anifrolumab in systemic lupus erythematosus: current knowledge and future considerations”. Immunotherapy. 12 (5): 275–86. doi:10.2217/imt-2020-0017. PMID 32237942.

External links

• “Anifrolumab”. Drug Information Portal. U.S. National Library of Medicine.
• Clinical trial number NCT01438489 for “A Study of the Efficacy and Safety of MEDI-546 in Systemic Lupus Erythematosus” at ClinicalTrials.gov
• Clinical trial number NCT02446912 for “Efficacy and Safety of Two Doses of Anifrolumab Compared to Placebo in Adult Subjects With Active Systemic Lupus Erythematosus” at ClinicalTrials.gov
• Clinical trial number NCT02446899 for “Efficacy and Safety of Anifrolumab Compared to Placebo in Adult Subjects With Active Systemic Lupus Erythematosus” at ClinicalTrials.gov

1. Goldberg A, Geppert T, Schiopu E, Frech T, Hsu V, Simms RW, Peng SL, Yao Y, Elgeioushi N, Chang L, Wang B, Yoo S: Dose-escalation of human anti-interferon-alpha receptor monoclonal antibody MEDI-546 in subjects with systemic sclerosis: a phase 1, multicenter, open label study. Arthritis Res Ther. 2014 Feb 24;16(1):R57. doi: 10.1186/ar4492. [Article]
2. Peng L, Oganesyan V, Wu H, Dall’Acqua WF, Damschroder MM: Molecular basis for antagonistic activity of anifrolumab, an anti-interferon-alpha receptor 1 antibody. MAbs. 2015;7(2):428-39. doi: 10.1080/19420862.2015.1007810. [Article]
3. Massarotti EM, Allore HG, Costenbader K: Editorial: Interferon-Targeted Therapy for Systemic Lupus Erythematosus: Are the Trials on Target? Arthritis Rheumatol. 2017 Feb;69(2):245-248. doi: 10.1002/art.39985. [Article]
4. Furie R, Khamashta M, Merrill JT, Werth VP, Kalunian K, Brohawn P, Illei GG, Drappa J, Wang L, Yoo S: Anifrolumab, an Anti-Interferon-alpha Receptor Monoclonal Antibody, in Moderate-to-Severe Systemic Lupus Erythematosus. Arthritis Rheumatol. 2017 Feb;69(2):376-386. doi: 10.1002/art.39962. [Article]
5. Tummala R, Rouse T, Berglind A, Santiago L: Safety, tolerability and pharmacokinetics of subcutaneous and intravenous anifrolumab in healthy volunteers. Lupus Sci Med. 2018 Mar 23;5(1):e000252. doi: 10.1136/lupus-2017-000252. eCollection 2018. [Article]
6. Riggs JM, Hanna RN, Rajan B, Zerrouki K, Karnell JL, Sagar D, Vainshtein I, Farmer E, Rosenthal K, Morehouse C, de Los Reyes M, Schifferli K, Liang M, Sanjuan MA, Sims GP, Kolbeck R: Characterisation of anifrolumab, a fully human anti-interferon receptor antagonist antibody for the treatment of systemic lupus erythematosus. Lupus Sci Med. 2018 Apr 5;5(1):e000261. doi: 10.1136/lupus-2018-000261. eCollection 2018. [Article]
7. Bui A, Sanghavi D: Anifrolumab . [Article]
8. Trindade VC, Carneiro-Sampaio M, Bonfa E, Silva CA: An Update on the Management of Childhood-Onset Systemic Lupus Erythematosus. Paediatr Drugs. 2021 Jul;23(4):331-347. doi: 10.1007/s40272-021-00457-z. Epub 2021 Jul 10. [Article]
9. Ryman JT, Meibohm B: Pharmacokinetics of Monoclonal Antibodies. CPT Pharmacometrics Syst Pharmacol. 2017 Sep;6(9):576-588. doi: 10.1002/psp4.12224. Epub 2017 Jul 29. [Article]
10. Koh JWH, Ng CH, Tay SH: Biologics targeting type I interferons in SLE: A meta-analysis and systematic review of randomised controlled trials. Lupus. 2020 Dec;29(14):1845-1853. doi: 10.1177/0961203320959702. Epub 2020 Sep 22. [Article]
11. FDA Approved Drug Products: Saphnelo (Anifrolumab-fnia) Intravenous Injection [Link]

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