Encyclopedia
REN-related kidney disease is an inherited condition that affects kidney function.
- genetic conditions
1. Introduction
This condition causes slowly progressive kidney disease that usually becomes apparent during childhood. As this condition progresses, the kidneys become less able to filter fluids and waste products from the body, resulting in kidney failure. Individuals with REN-related kidney disease typically require dialysis (to remove wastes from the blood) or a kidney transplant between ages 40 and 70.
People with REN-related kidney disease sometimes have low blood pressure. They may also have mildly increased levels of potassium in their blood (hyperkalemia). In childhood, people with REN-related kidney disease develop a shortage of red blood cells (anemia), which can cause pale skin, weakness, and fatigue. In this disorder, anemia is usually mild and begins to improve during adolescence.
Many individuals with this condition develop high blood levels of a waste product called uric acid. Normally, the kidneys remove uric acid from the blood and transfer it to urine so it can be excreted from the body. In REN-related kidney disease, the kidneys are unable to remove uric acid from the blood effectively. A buildup of uric acid can cause gout, which is a form of arthritis resulting from uric acid crystals in the joints. Individuals with REN-related kidney disease may begin to experience the signs and symptoms of gout during their twenties.
2. Frequency
REN-related kidney disease is a rare condition. At least three families with this condition have been identified.
3. Causes
Mutations in the REN gene cause REN-related kidney disease. This gene provides instructions for making a protein called renin that is produced in the kidneys. Renin plays an important role in regulating blood pressure and water levels in the body.
Mutations in the REN gene that cause REN-related kidney disease result in the production of an abnormal protein that is toxic to the cells that normally produce renin. These kidney cells gradually die off, which causes progressive kidney disease.
4. Inheritance
This condition is inherited in an autosomal dominant pattern, which means one copy of the altered gene in each cell is sufficient to cause the disorder.
5. Other Names for This Condition
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Familial juvenile hyperuricemic nephropathy 2
This entry is adapted from the peer-reviewed paper https://medlineplus.gov/genetics/condition/ren-related-kidney-disease
References
- Beck BB, Trachtman H, Gitman M, Miller I, Sayer JA, Pannes A, Baasner A,Hildebrandt F, Wolf MT. Autosomal dominant mutation in the signal peptide ofrenin in a kindred with anemia, hyperuricemia, and CKD. Am J Kidney Dis. 2011Nov;58(5):821-5. doi: 10.1053/j.ajkd.2011.06.029.
- Bleyer AJ, Zivná M, Hulková H, Hodanová K, Vyletal P, Sikora J, Zivný J,Sovová J, Hart TC, Adams JN, Elleder M, Kapp K, Haws R, Cornell LD, Kmoch S, HartPS. Clinical and molecular characterization of a family with a dominant reningene mutation and response to treatment with fludrocortisone. Clin Nephrol. 2010 Dec;74(6):411-22.
- Zivná M, Hůlková H, Matignon M, Hodanová K, Vylet'al P, Kalbácová M, Baresová V, Sikora J, Blazková H, Zivný J, Ivánek R, Stránecký V, Sovová J, Claes K, LerutE, Fryns JP, Hart PS, Hart TC, Adams JN, Pawtowski A, Clemessy M, Gasc JM, GüblerMC, Antignac C, Elleder M, Kapp K, Grimbert P, Bleyer AJ, Kmoch S. Dominant reningene mutations associated with early-onset hyperuricemia, anemia, and chronickidney failure. Am J Hum Genet. 2009 Aug;85(2):204-13. doi:10.1016/j.ajhg.2009.07.010.
- Živná M, Kidd K, Kmoch S, Bleyer AJ. Autosomal Dominant TubulointerstitialKidney Disease – REN. 2011 Apr 5 [updated 2020 Dec 10]. In: Adam MP, Ardinger HH,Pagon RA, Wallace SE, Bean LJH, Stephens K, Amemiya A, editors. GeneReviews®[Internet]. Seattle (WA): University of Washington, Seattle; 1993-2020. Availablefrom http://www.ncbi.nlm.nih.gov/books/NBK53700/
