Von Hippel-Lindau syndrome
H P Neumann1, C J Lips, Y E Hsia
1Department of Medicine, Albert-Ludwigs-University, Freiburg, Germany.
Brain Pathology (Zurich, Switzerland)
|April 1, 1995
Summary
Genetic analysis of the von Hippel-Lindau (VHL) gene identified germline mutations in 75% of families. Specific VHL mutations correlate with distinct disease patterns, aiding carrier status determination.
Area of Science:
- Genetics
- Oncology
- Molecular Biology
Background:
- The von Hippel-Lindau (VHL) gene, cloned in 1993, is a tumor suppressor gene implicated in hereditary cancer syndromes.
- VHL disease is characterized by the development of multiple tumors and cysts in various organs.
Purpose of the Study:
- To investigate the spectrum of mutations in the VHL gene.
- To establish genotype-phenotype correlations in VHL disease.
- To improve diagnostic capabilities and carrier status determination for VHL families.
Main Methods:
- Comprehensive mutation screening of the VHL gene in affected families.
- Detailed clinical evaluation and phenotyping of patients.
- Analysis of genotype-phenotype relationships.
Main Results:
- Germline mutations in the VHL gene were identified in approximately 75% of VHL families studied.
- A variety of mutations, including point mutations, deletions, and rearrangements, were detected.
- Specific VHL mutations were associated with distinct clinical manifestations and tumor patterns, such as pheochromocytoma without renal cancer linked to point mutations.
Conclusions:
- Molecular genetic analysis of the VHL gene is crucial for diagnosing VHL disease and identifying carriers.
- Understanding genotype-phenotype correlations enhances the prediction of disease manifestations and progression.
- These findings contribute to a better understanding of the VHL gene's role in tumorigenesis and cancer susceptibility.
Related Concept Videos
01:11Genetic Lingo
Overview
01:33Pleiotropy
Pleiotropy is the phenomenon in which a single gene impacts multiple, seemingly unrelated phenotypic traits. For example, defects in the SOX10 gene cause Waardenburg Syndrome Type 4, or WS4, which can cause defects in pigmentation, hearing impairments, and an absence of intestinal contractions necessary for elimination. This diversity of phenotypes results from the expression pattern of SOX10 in early embryonic and fetal development. SOX10 is found in neural crest cells that form melanocytes,...
02:30Genomic Imprinting and Inheritance
Diploid organisms inherit genetic material through chromosomes from both parents. Copies of the same gene are known as alleles. In most cases, both alleles are simultaneously expressed and allow various cellular processes to function optimally. If one of the alleles is missing or mutated, the expression of the other allele can compensate; however, this is not true for all genes.
The expression of some genes depends on which parent passed the gene to the offspring, through a phenomenon known as...
The expression of some genes depends on which parent passed the gene to the offspring, through a phenomenon known as...
01:42Phosphoinositides and PIPs
Phosphoinositides are a group of phospholipids containing a glycerol backbone with two fatty acid chains and a phosphate attached to a myoinositol sugar ring. The inositol head group extends into the cytoplasm, where it is modified by adding phosphate groups to form phosphatidylinositol phosphates or PIPs.
Different phosphoinositides are synthesized and recruited on the cytosolic face of the plasma membrane. The localization of specific phosphoinositides concentrated in separate membrane...
Different phosphoinositides are synthesized and recruited on the cytosolic face of the plasma membrane. The localization of specific phosphoinositides concentrated in separate membrane...
02:33Hedgehog Signaling Pathway
The Hedgehog gene (Hh) was first discovered due to its control of the growth of disorganized, hair-like bristles phenotype in Drosophila, much like hedgehog spines. Hh plays a crucial role in the development of organs and the maintenance of homeostasis in both invertebrates and vertebrates. However, while Drosophila has only one Hh protein, mammals have multiple functional Hedgehog proteins - Sonic (Shh), Desert (Dhh), and Indian Hedgehog (Ihh). All of these homologous proteins have adapted to...
01:22iPS Cell Differentiation
The ability of induced pluripotent stem cells or iPSCs to differentiate into most body cell types has stimulated repair and regenerative medicine research over the past few decades. iPSC-derived blood cells, hepatocytes, beta islet cells, cardiomyocytes, neurons, and other cell types can repair injuries or regenerate damaged tissue in diseases such as diabetes and neurodegenerative disorders.