OBJECTIVE: The aetiology of kidney stones is multifactorial, with environmental and genetic factors contributing to the pathogenesis. The aim of this study was to assess the role of genetic factors in kidney stone disease by examining the heritability of the trait in Icelandic patients. MATERIAL AND METHODS: Medical records at all major hospitals and imaging centres in Iceland were searched for diagnostic codes indicative of kidney stones, yielding a cohort of 5954 incident patients with kidney stone disease. The list of patients was cross-matched with a genealogy database that covers the entire Icelandic nation. The risk ratio (RR) and kinship coefficient (KC) were calculated to determine the risk of kidney stones in relatives of stone formers and the relatedness among kidney stone patients. RESULTS: The risk of kidney stones among family members of stone formers was significantly higher than in the general population. In 2959 patients with radiopaque stones, the RR ranged from 2.25 (p<0.001) for first degree relatives of probands (such as parents or siblings) to 1.07 (p<0.01) in fifth degree relatives. Moreover, for confirmed recurrent stone formers the RR of kidney stones in parents and offspring was in excess of 10 (p<0.001). The KC analysis shows that Icelandic patients with kidney stone disease are significantly more related to each other than is the average Icelander, even when considering only relatives separated by four meioses or more (p<0.05). CONCLUSIONS: The results suggest that genetic factors may substantially influence the risk of kidney stone disease in Iceland.
OBJECTIVE: The aetiology of kidney stones is multifactorial, with environmental and genetic factors contributing to the pathogenesis. The aim of this study was to assess the role of genetic factors in kidney stone disease by examining the heritability of the trait in Icelandic patients. MATERIAL AND METHODS: Medical records at all major hospitals and imaging centres in Iceland were searched for diagnostic codes indicative of kidney stones, yielding a cohort of 5954 incident patients with kidney stone disease. The list of patients was cross-matched with a genealogy database that covers the entire Icelandic nation. The risk ratio (RR) and kinship coefficient (KC) were calculated to determine the risk of kidney stones in relatives of stone formers and the relatedness among kidney stonepatients. RESULTS: The risk of kidney stones among family members of stone formers was significantly higher than in the general population. In 2959 patients with radiopaque stones, the RR ranged from 2.25 (p<0.001) for first degree relatives of probands (such as parents or siblings) to 1.07 (p<0.01) in fifth degree relatives. Moreover, for confirmed recurrent stone formers the RR of kidney stones in parents and offspring was in excess of 10 (p<0.001). The KC analysis shows that Icelandic patients with kidney stone disease are significantly more related to each other than is the average Icelander, even when considering only relatives separated by four meioses or more (p<0.05). CONCLUSIONS: The results suggest that genetic factors may substantially influence the risk of kidney stone disease in Iceland.
Authors: Ragnar P Kristjansson; Stefania Benonisdottir; Asmundur Oddsson; Tessel E Galesloot; Gudmar Thorleifsson; Katja K Aben; Olafur B Davidsson; Stefan Jonsson; Gudny A Arnadottir; Brynjar O Jensson; G Bragi Walters; Jon K Sigurdsson; Snaevar Sigurdsson; Hilma Holm; David O Arnar; Gudmundur Thorgeirsson; Kristin Alexiusdottir; Ingileif Jonsdottir; Unnur Thorsteinsdottir; Lambertus A Kiemeney; Thorvaldur Jonsson; Daniel F Gudbjartsson; Thorunn Rafnar; Patrick Sulem; Kari Stefansson Journal: Sci Rep Date: 2017-06-08 Impact factor: 4.379
Authors: Thorunn Rafnar; Bjarni Gunnarsson; Olafur A Stefansson; Patrick Sulem; Andres Ingason; Michael L Frigge; Lilja Stefansdottir; Jon K Sigurdsson; Vinicius Tragante; Valgerdur Steinthorsdottir; Unnur Styrkarsdottir; Simon N Stacey; Julius Gudmundsson; Gudny A Arnadottir; Asmundur Oddsson; Florian Zink; Gisli Halldorsson; Gardar Sveinbjornsson; Ragnar P Kristjansson; Olafur B Davidsson; Anna Salvarsdottir; Asgeir Thoroddsen; Elisabet A Helgadottir; Katrin Kristjansdottir; Orri Ingthorsson; Valur Gudmundsson; Reynir T Geirsson; Ragnheidur Arnadottir; Daniel F Gudbjartsson; Gisli Masson; Folkert W Asselbergs; Jon G Jonasson; Karl Olafsson; Unnur Thorsteinsdottir; Bjarni V Halldorsson; Gudmar Thorleifsson; Kari Stefansson Journal: Nat Commun Date: 2018-09-07 Impact factor: 14.919
Authors: Kari Hemminki; Otto Hemminki; Anni I M Koskinen; Asta Försti; Kristina Sundquist; Jan Sundquist; Xinjun Li Journal: BMC Nephrol Date: 2018-07-03 Impact factor: 2.388