Ipsen completes acquisition of Memo Therapeutics AG, adding first-in-class asset to Ipsen's Rare Disease pipeline
PARIS, FRANCE, 22 JULY 2026 - Ipsen (Euronext: IPN; ADR: IPSEY) announced today it has completed the acquisition of Memo Therapeutics AG, a late-stage biotech company focused on potravitug, an anti-BK polyomavirus monoclonal antibody.
About potravitug Potravitug is a first-in-class monoclonal antibody targeting BK polyomavirus (BKPyV) reactivation in kidney transplant recipients. It has shown promising results in clinical trials, demonstrating a significant anti-viral response and resolution of BKPyV associated nephropathy. These findings are based on the Phase II SAFE KIDNEY II trial, the largest placebo-controlled study conducted in this patient population, with additional analyses presented at leading international renal and transplant congresses further supporting its clinical profile and the next stages of clinical development.
About BK polyomavirus BK polyomavirus (BKPyV) is a common virus that most people are exposed to in childhood and usually remains inactive in the body.i However, in people with a weakened immune system, including kidney transplant recipients taking anti-rejection medication, the virus can reactivate and multiply. Around 90% of kidney transplant recipients are positive for BKPyV serotype,ii and high levels of BKPyV in the blood affect approximately 30% of patients within the first year after transplant indicating reactivation of the virus.iii BK polyomavirus reactivation and associated nephropathy (BKVAN) can have serious consequences, including an increased risk of graft loss and the need for dialysis or re-transplantation. There are currently no approved targeted therapies for BKPyV and clinical management is focused on balancing graft protection with BKPyV control through reducing the immunosuppression.iv,v Over 100,000 kidney transplants are performed each year worldwide, and in the U.S. >28,000 are performed each year, with a further >90,000 patients on the waiting list for a transplant.vi
About Ipsen We are a global biopharmaceutical company with a focus on bringing transformative medicines to patients in three therapeutic areas: Oncology, Rare Disease and Neuroscience. Our pipeline is fueled by internal and external innovation and supported by nearly 100 years of development experience and global hubs in the U.S., France and the U.K. Our teams in more than 40 countries and our partnerships around the world enable us to bring medicines to patients in more than 100 countries.
Ipsen is listed in Paris (Euronext: IPN) and in the U.S. through a Sponsored Level I American Depositary Receipt program (ADR: IPSEY). For more information, visit ipsen.com.
| Ipsen Contacts | ||
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| Sally Bain | sally.bain@ipsen.com | +1 857 320 0517 |
| Anne Liontas | anne.liontas.ext@ipsen.com | +33 7 67 34 72 96 |
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i https://www.kidney.org/kidney-topics/bk-virus-what-transplant-patients-need-to-know ii B. Demey et al. Risk factors for BK viremia and nephropathy after kidney transplantation: a systematic review. J Clin Virol. 2018 Dec;109:6-12. B. Demey et al. Risk factors for BK viremia and nephropathy after kidney transplantation: a systematic review. J Clin Virol. 2018 Dec;109:6-12. iii S. Kant et al. BK Virus Nephropathy in Kidney Transplantation: A State-of-the-Art Review. Viruses 2022 Jul 25; 14 (8):1616 iv C.N. Kotton et al. The second international consensus guidelines on the management of BK polyomavirus in kidney transplantation. Transplantation. 2024 Sep 1;108(9):1834-1866. v UK Guidelines: UK Guideline on Management of Bk Polyomavirus (BKPyV) Infection and Disease Following Kidney Transplantation - British Transplantation Society UK Guideline on Management of Bk Polyomavirus (BKPyV) Infection and Disease Following Kidney Transplantation - British Transplantation Society vi K.L. Lentine et al. OPTN/SRTS 2021 annual data report: kidney. Am. J. Transplant. 23 (2 Suppl 1) (2023). P. S21-S120
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