The Effect of Roxadustat on Renal Oxygenation in Diabetes Nephropathy

Summary

The study will investigate if treatment with Roxadustat improves kidney oxygenation in diabetic patients with nephropathy receiving treatment for renal anemia, compared to patients receiving treatment with darbepoetin alpha. Participants will be randomized to either treatment, and receive equal care for renal anemia. Kidney oxygenation will be examined before treatment start and after 24 weeks using BOLD-MRI (blood oxygen level-defendant MRI), a non-invasive method available for measurement of tissue oxygenation levels that is comparable with direct invasive measurement of partial oxygen pressure. Blood and urin samples will be collected in connection to these visits. The primary endpoint is the change in medullary and cortical R2\* (inversely proportional to the tissue oxygenation content) after 24 weeks. Secondary endpoints will be albuminuria and urinary levels of ROS (evaluated by electron paramagnetic resonance (EPR) spectroscopy with CPH spin probes).

Timeline

Start

2025-06-01

Primary completion

2027-01-01

Completion

2027-12-31

Publications

• Background Catrina SB, Zheng X. Hypoxia and hypoxia-inducible factors in diabetes and its complications. Diabetologia. 2021 Apr;64(4):709-716. doi: 10.1007/s00125-021-05380-z. Epub 2021 Jan 26.
• Background Sebastiani G, Grieco FA, Spagnuolo I, Galleri L, Cataldo D, Dotta F. Increased expression of microRNA miR-326 in type 1 diabetic patients with ongoing islet autoimmunity. Diabetes Metab Res Rev. 2011 Nov;27(8):862-6. doi: 10.1002/dmrr.1262.
• Background Ruiter MS, van Golde JM, Schaper NC, Stehouwer CD, Huijberts MS. Diabetes impairs arteriogenesis in the peripheral circulation: review of molecular mechanisms. Clin Sci (Lond). 2010 Jun 8;119(6):225-38. doi: 10.1042/CS20100082.
• Background Flyvbjerg A. Diabetic angiopathy, the complement system and the tumor necrosis factor superfamily. Nat Rev Endocrinol. 2010 Feb;6(2):94-101. doi: 10.1038/nrendo.2009.266.
• Background Friederich M, Fasching A, Hansell P, Nordquist L, Palm F. Diabetes-induced up-regulation of uncoupling protein-2 results in increased mitochondrial uncoupling in kidney proximal tubular cells. Biochim Biophys Acta. 2008 Jul-Aug;1777(7-8):935-40. doi: 10.1016/j.bbabio.2008.03.030. Epub 2008 Apr 7.
• Background Koyasu S, Kobayashi M, Goto Y, Hiraoka M, Harada H. Regulatory mechanisms of hypoxia-inducible factor 1 activity: Two decades of knowledge. Cancer Sci. 2018 Mar;109(3):560-571. doi: 10.1111/cas.13483. Epub 2018 Jan 27.
• Background Xia X, Lemieux ME, Li W, Carroll JS, Brown M, Liu XS, Kung AL. Integrative analysis of HIF binding and transactivation reveals its role in maintaining histone methylation homeostasis. Proc Natl Acad Sci U S A. 2009 Mar 17;106(11):4260-5. doi: 10.1073/pnas.0810067106. Epub 2009 Mar 2.
• Background Elson DA, Ryan HE, Snow JW, Johnson R, Arbeit JM. Coordinate up-regulation of hypoxia inducible factor (HIF)-1alpha and HIF-1 target genes during multi-stage epidermal carcinogenesis and wound healing. Cancer Res. 2000 Nov 1;60(21):6189-95.
• Background Ceradini DJ, Kulkarni AR, Callaghan MJ, Tepper OM, Bastidas N, Kleinman ME, Capla JM, Galiano RD, Levine JP, Gurtner GC. Progenitor cell trafficking is regulated by hypoxic gradients through HIF-1 induction of SDF-1. Nat Med. 2004 Aug;10(8):858-64. doi: 10.1038/nm1075. Epub 2004 Jul 4.
• Background Catrina SB. Impaired hypoxia-inducible factor (HIF) regulation by hyperglycemia. J Mol Med (Berl). 2014 Oct;92(10):1025-34. doi: 10.1007/s00109-014-1166-x. Epub 2014 Jun 12.
• Background Palm F, Cederberg J, Hansell P, Liss P, Carlsson PO. Reactive oxygen species cause diabetes-induced decrease in renal oxygen tension. Diabetologia. 2003 Aug;46(8):1153-60. doi: 10.1007/s00125-003-1155-z. Epub 2003 Jul 17.
• Background Semenza GL. Pharmacologic Targeting of Hypoxia-Inducible Factors. Annu Rev Pharmacol Toxicol. 2019 Jan 6;59:379-403. doi: 10.1146/annurev-pharmtox-010818-021637.
• Background Pruijm M, Mendichovszky IA, Liss P, Van der Niepen P, Textor SC, Lerman LO, Krediet CTP, Caroli A, Burnier M, Prasad PV. Renal blood oxygenation level-dependent magnetic resonance imaging to measure renal tissue oxygenation: a statement paper and systematic review. Nephrol Dial Transplant. 2018 Sep 1;33(suppl_2):ii22-ii28. doi: 10.1093/ndt/gfy243.

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