Wilms Tumor: Genes, Imprinting & Cancer Causes
- A new study has shed light on the hereditary factors behind Wilms tumor, a type of kidney cancer affecting young children.
- The research, published in Genome Medicine, highlights the importance of the JMU Biocenter's Wilms tumor biobank, which has collected samples from about 1,800 children as 1994.
- The study supports the "two-hit hypothesis," which explains how hereditary childhood tumors develop.Researchers found that mutations in the WT1 tumor suppressor gene are common.
Uncover the genetic secrets behind Wilms tumor, a childhood kidney cancer, and its links to genetic predisposition and genomic imprinting. A groundbreaking study reveals that over 90% of familial cases have identifiable genetic roots.Researchers pinpoint mutations in the WT1 gene, alongside the role of the Igph2 gene, and epigenetic factors. This research underscores how hereditary factors and embryonic development disturbances influence tumor formation. From the JMU Biocenter’s biobank, the team found this could help improve genetic counseling and monitoring. News Directory 3 provides this breakdown to shed light on potential risks and paves the way for better diagnostics. What will future research reveal?
Research Uncovers Genetic Predisposition for Wilms Tumor
Updated May 28, 2025
A new study has shed light on the hereditary factors behind Wilms tumor, a type of kidney cancer affecting young children. Researchers at Julius-Maximilians-Universität Würzburg (JMU), in collaboration with the Wellcome Sanger Institute, analyzed samples from a wilms tumor biobank to understand the genetic roots of the disease.
The research, published in Genome Medicine, highlights the importance of the JMU Biocenter’s Wilms tumor biobank, which has collected samples from about 1,800 children as 1994. This collection included samples from familial and bilateral tumors, which are more likely to have a genetic component. Dr. Jenny Wegert, the study’s led author, said the team identified the underlying genetic predisposition in over 90% of these cases.
The study supports the “two-hit hypothesis,” which explains how hereditary childhood tumors develop.Researchers found that mutations in the WT1 tumor suppressor gene are common. Initially, one copy of the WT1 gene is inactivated, increasing the risk of kidney failure and genitourinary malformations in boys. Tumor formation occurs when the second WT1 gene copy fails and the Igph2 growth factor activates, leading to tumor precursors. Activation of the WNT signaling pathway then results in a malignant tumor.
In about half the patients, scientists identified genetic changes in all body cells as the likely cause. Besides WT1,othre genes were affected,though less frequently. Surprisingly, about a third of the children had a disturbance in the genomic imprinting of the Igph2 gene, rather than classic hereditary mutations, according to Wegert. This imprinting occurs during embryonic development and isn’t hereditary, meaning siblings aren’t at increased risk.
Children with this epigenetic predisposition often had “mosaics,” with normal cells alongside cells with impaired Igph2 imprinting. Tumors developed if mutations in other genes occurred in kidney cells with disturbed Igph2 regulation.
Professor Manfred Gessler, chair of Developmental Biochemistry and head of the study, emphasized the hereditary component in a significant proportion of childhood kidney tumors. He said this finding has significant clinical implications, including increased risk for siblings and the potential for secondary tumors or early kidney failure in patients.
The study advocates for broad molecular testing of blood and tumor samples from young patients to identify high-risk cases early and ensure close monitoring for Wilms tumor.
what’s next
Future research will focus on refining genetic screening methods and developing targeted therapies based on these findings, perhaps improving outcomes for children with Wilms tumor and those with a genetic predisposition.