Whole-exome sequencing reveals genetic variants associated with chronic kidney disease characterized by tubulointerstitial damages in North Central Region, Sri Lanka

Shanika Nanayakkara, Lalantha Senevirathna, Nipuna B Parahitiyawa, Tilak Abeysekera, Rohana Chandrajith, Neelakanthi Ratnatunga, Toshiaki Hitomi, Hatasu Kobayashi, Kouji H Harada, Akio Koizumi

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)

Abstract

Objectives: The familial clustering observed in chronic kidney disease of uncertain etiology (CKDu) characterized by tubulointerstitial damages in the North Central Region of Sri Lanka strongly suggests the involvement of genetic factors in its pathogenesis. The objective of the present study is to use whole-exome sequencing to identify the genetic variants associated with CKDu. Methods: Whole-exome sequencing of eight CKDu cases and eight controls was performed, followed by direct sequencing of candidate loci in 301 CKDu cases and 276 controls. Results: Association study revealed rs34970857 (c.658G > A/p.V220M) located in the KCNA10 gene encoding a voltage-gated K channel as the most promising SNP with the highest odds ratio of 1.74. Four rare variants were identified in gene encoding Laminin beta2 (LAMB2) which is known to cause congenital nephrotic syndrome. Three out of four variants in LAMB2 were novel variants found exclusively in cases. Conclusion: Genetic investigations provide strong evidence on the presence of genetic susceptibility for CKDu. Possibility of presence of several rare variants associated with CKDu in this population is also suggested.
Original languageEnglish
Pages (from-to)354-359
Number of pages6
JournalEnvironmental Health and Preventive Medicine
Volume20
Issue number5
DOIs
Publication statusPublished - Jun 2015

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