Adeno-associated virus-vectored erythropoietin gene therapy for anemia in cats with chronic kidney disease.

Autor: Vaden SL; Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina, 27607, USA., Kendall AR; Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina, 27607, USA., Foster JD; Friendship Hospital for Animals, Washington, DC, 20016, USA., New HL; VCA Sacramento Veterinary Referral Center, Sacramento, California, 95287, USA., Eagleson JS; Bleecker Street Consulting, New York, New York 10012, USA., May JL; Scout Bio, Inc., Philadelphia, Pennsylvania, 19104, USA., Traas AM; Scout Bio, Inc., Philadelphia, Pennsylvania, 19104, USA., Wilson MJ; Scout Bio, Inc., Philadelphia, Pennsylvania, 19104, USA., McIntyre BH; Beth Oman Clinical Consulting LLC, Kalamazoo, Michigan, 49004, USA., Hinderer CJ; Gene Therapy Program, Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, 19104, USA., Olenick LK; Scout Bio, Inc., Philadelphia, Pennsylvania, 19104, USA., Wilson JM; Gene Therapy Program, Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, 19104, USA.
Jazyk: angličtina
Zdroj: Journal of veterinary internal medicine [J Vet Intern Med] 2023 Nov-Dec; Vol. 37 (6), pp. 2200-2210. Date of Electronic Publication: 2023 Oct 17.
DOI: 10.1111/jvim.16900
Abstrakt: Background: A treatment of chronic kidney disease (CKD)-associated anemia in cats is needed. SB-001 is an adeno-associated virus-vectored (AAV)-based gene therapeutic agent that is administered intramuscularly, causing the expression of feline erythropoietin.
Hypothesis/objective: We hypothesized that SB-001 injection would lead to a sustained increase in PCV in cats with CKD-associated anemia.
Animals: Twenty-three cats with International Renal Interest Society (IRIS) Stage 2 to 4 CKD-associated anemia were enrolled at 4 veterinary clinics.
Methods: In a prospective clinical trial, cats were treated with 1 of 3 regimens of SB-001 (Lo 1.2 × 10 9 genome copies [GCs] on Day 0; Lo ± Hi [supplemental 2nd dose of 3.65 × 10 9 GC on Day 42]; Hi 3.65 × 10 9 GC IM on Day 0) and followed for 70 days.
Results: A response to SB-001 at any time between Day 28 and Day 70 was seen in 86% (95% confidence interval 65, 97%) of all cats. There was a significant (P < .003) increase in PCV from Day 0 to Day 28 (mean increase 6 ± 6 percentage points [pp]; n = 21), Day 42 (8 ± 9 pp; n = 21), Day 56 (10 ± 11 pp; n = 17), and Day 70 (13 ± 14 pp, n = 14). Twelve cats were hypertensive at baseline, 4 of which developed encephalopathy during the study. An additional 6 cats became hypertensive during the study.
Conclusions and Clinical Importance: Results of this study suggest that SB-001 therapy represents a suitable single injection treatment that can address nonregenerative anemia in cats with CKD. It was generally well tolerated; however, hypertension and encephalopathy developed in some cats as previously described in association with erythropoiesis-stimulating agent therapy.
(© 2023 The Authors. Journal of Veterinary Internal Medicine published by Wiley Periodicals LLC on behalf of American College of Veterinary Internal Medicine.)
Databáze: MEDLINE
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