2021年5月10日,安進宣布向FDA遞交TSLP抗體Tezepelumab的上市申請,用于治療重度哮*[1]。早在2020年11月10日,安進/阿斯利康聯合宣布其TSLP抗體Tezepelumab治療重度哮*的三期臨床NAVIGATOR獲得成功;盡管后續SOURCE試驗結果顯示:與安慰劑相比,Tezepelumab在未能達到每日口服糖皮質激素(OCS)劑量在統計上顯著減少的主要終點,但Tezepelumab的其他療效指標與的前期研究結果一致,包括注冊III期NAVIGATOR研究。此外,Tezepelumab的安全性結果也與之前的研究一致[2]。
根據EvaluatePharma的數據顯示,預計Tezepelumab市場上市后,將會在2026年突破十億美元年銷售額大關,達到10.21億美元(Fig.1)[3]。

TSLP R:TSLP:IL-7Rα三元復合物

Fig. 2 A. TSLP is expressed predominantly by lung epithelial cells. B. Human mast cells express both TSLPR and IL-7Rα and TSLP induces the release of cytokines/chemokines.
同在Th2通路中的哮*靶點IL-4、IL-5、IL-13、IL-33作用也已經被驗證具有臨床治療價值。以賽諾菲/再生元的IL-4R抗體Dupixent為例,該抗體適應癥為濕疹與哮*,上市以來銷售額一路攀升,2020年銷售額40億美元。目前哮*相關藥物臨床實驗主要包括IL-4、IL-5、IL-13、IL-33與TSLP靶點。(見下表)


驗證數據

Serial dilutions of Anti-Human TSLP Antibody, Human IgG2 were added into Human IL-7 R alpha & TSLP R Heterodimer Protein, Fc Tag & Fc Tag (MALS verified) (Cat. No. ILR-H5255) and Human TSLP R, Fc Tag (Cat. No. TSR-H525a): Biotinylated Human TSLP Protein, His,Avitag? (Cat. No. TSP-H82Eb) binding reactions. The half maximal inhibitory concentrations (IC50) of Human IL-7 R alpha & TSLP R Heterodimer Protein, Fc Tag & Fc Tag (MALS verified) and Human TSLP R, Fc Tag are 1.09688 μg/mL and 0.16239 μg/mL respectively.
Biotinylated Human SPR

Loaded Human IL-7 RA&TSLP R Heterodimer Protein, Fc Tag&Fc Tag (Cat. No. ILR-H5255) on Protein A Biosensor, can bind Human TSLP, His Tag (Cat. No. TSP-H52Hb) with an affinity constant of 134 pM as determined in BLI assay (ForteBio Octet Red96e).
您可通過以下方式聯系到ACROBiosystems:
郵件:inquiry@acrobiosystems.com
電話:15117918562

(備注:姓名+公司)
參考資料
1.https://www.amgen.com/newsroom/press-releases/2021/05/amgen-announces-tezepelumab-biologics-license-application-submitted-to-u-s--fda
2.https://www.astrazeneca.com/media-centre/press-releases/2020/update-on-source-phase-iii-trial-for-tezepelumab-in-patients-with-severe-oral-corticosteroid-dependent-asthma.html
3.https://www.evaluate.com/vantage/articles/news/trial-results/source-flop-raises-tezepelumab-questions
4.Marone G, et al. Expert Opin Investig Drugs. 2019. PMID: 31549891 Review.
5.Varricchi G, Pecoraro, A, Marone, G, et al. Thymic Stromal Lymphopoietin Isoforms, Inflammatory Disorders, and Cancer. Front Immunol. 2018; 9: 1595.



