PBX1haploinsufficiency leads to syndromic congenital anomalies of the kidney and urinary tract (CAKUT) in humans
| Autor: | Françoise Devillard, Marie Bidart, Véronique Satre, Pierre-Simon Jouk, Pauline Le Tanno, Frédérique Béna, Pierre F. Ray, Klaus Dieterich, Ida Vogel, Julie Breton, Maria Antonietta Pisanti, Charles Coutton, Hervé Sartelet, Luisa Mackenroth, Siv Fokstuen, M. C. Digilio, Fitsum Guebre-Egziabher, Alexia Apostolou, Karl Hackmann, C Bosson, Rikke Christensen, Sylvie Odent, Antonio Novelli, Radu Harbuz, Rachel Beddow, Gemma Poke, Laura Bernardini, Sylvie Jaillard, Gaëlle Vieville, Florence Amblard |
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| Rok vydání: | 2017 |
| Předmět: |
0301 basic medicine
Genetics Fetus Pregnancy Pathology medicine.medical_specialty Kidney Microarray analysis techniques Urinary system Genetic counseling 030105 genetics & heredity Biology medicine.disease 03 medical and health sciences 030104 developmental biology medicine.anatomical_structure Journal Article medicine Copy-number variation Haploinsufficiency Genetics (clinical) |
| Zdroj: | Le Tanno, P, Breton, J, Bidart, M, Satre, V, Harbuz, R, Ray, P F, Bosson, C, Dieterich, K, Jaillard, S, Odent, S, Poke, G, Beddow, R, Digilio, M C, Novelli, A, Bernardini, L, Pisanti, M A, Mackenroth, L, Hackmann, K, Vogel, I, Christensen, R, Fokstuen, S, Béna, F, Amblard, F, Devillard, F, Vieville, G, Apostolou, A, Jouk, P-S, Guebre-Egziabher, F, Sartelet, H & Coutton, C 2017, ' PBX1 haploinsufficiency leads to syndromic congenital anomalies of the kidney and urinary tract (CAKUT) in humans ', Journal of Medical Genetics, vol. 54, no. 7, pp. 502-510 . https://doi.org/10.1136/jmedgenet-2016-104435 |
| ISSN: | 1468-6244 0022-2593 |
| Popis: | BACKGROUND: Congenital anomalies of the kidney and urinary tract (CAKUT) represent a significant healthcare burden since it is the primary cause of chronic kidney in children. CNVs represent a recurrent molecular cause of CAKUT but the culprit gene remains often elusive. Our study aimed to define the gene responsible for CAKUT in patients with an 1q23.3q24.1 microdeletion.METHODS: We describe eight patients presenting with CAKUT carrying an 1q23.3q24.1 microdeletion as identified by chromosomal microarray analysis (CMA). Clinical features were collected, especially the renal and urinary tract phenotype, and extrarenal features. We characterised PBX1 expression and localisation in fetal and adult kidneys using quantitative RT-PCR and immunohistochemistry.RESULTS: We defined a 276-kb minimal common region (MCR) that only overlaps with the PBX1 gene. All eight patients presented with syndromic CAKUT. CAKUT were mostly bilateral renal hypoplasia (75%). The most frequent extrarenal symptoms were developmental delay and ear malformations. We demonstrate that PBX1 is strongly expressed in fetal kidneys and brain and expression levels decreased in adult samples. In control fetal kidneys, PBX1 was localised in nuclei of medullary, interstitial and mesenchymal cells, whereas it was present in endothelial cells in adult kidneys.CONCLUSIONS: Our results indicate that PBX1 haploinsufficiency leads to syndromic CAKUT as supported by the Pbx1-null mice model. Correct PBX1 dosage appears to be critical for normal nephrogenesis and seems important for brain development in humans. CMA should be recommended in cases of fetal renal anomalies to improve genetic counselling and pregnancy management. |
| Databáze: | OpenAIRE |
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