Related Experiment Video
Updated: Aug 15, 2025
10:40
CRISPR Gene Editing Tool for MicroRNA Cluster Network Analysis
Published on: April 25, 2022
2.5K
A polygenic two-hit hypothesis for prostate cancer
Kathleen E Houlahan1,2,3,4,5,6, Julie Livingstone1,2,4,7, Natalie S Fox1,2,3,4,5
1Department of Human Genetics, University of California, Los Angeles, CA, USA.
Journal of the National Cancer Institute
|January 7, 2023
Summary
Higher genetic risk for prostate cancer means earlier diagnosis and less tumor evolution. This suggests polygenic risk scores can aid in stratifying patient outcomes and understanding cancer development.
Area of Science:
- Oncology
- Genetics
- Cancer Research
Background:
- Prostate cancer exhibits high heritability, with numerous germline polymorphisms influencing diagnosis and prognosis.
- Polygenic risk scores (PRS) can predict an individual's genetic predisposition to prostate cancer.
- The impact of germline genetic risk on the molecular evolution of prostate tumors remains largely unexplored.
Purpose of the Study:
- To investigate the relationship between germline genetic risk and the molecular characteristics of prostate tumors.
- To determine if higher genetic risk influences tumor development, genomic instability, and mutation profiles.
- To explore the implications of these findings for prostate cancer risk stratification and patient outcomes.
Main Methods:
- Analysis of germline and somatic DNA from a cohort of 1250 localized prostate cancer patients of European descent.
- Correlation of polygenic risk scores with clinical data, including age at diagnosis and patient outcomes.
- Assessment of tumor genomic instability and mutation rates in relation to genetic risk levels.
Main Results:
- Men of European descent with higher genetic risk experienced earlier prostate cancer diagnoses.
- Higher genetic risk was associated with reduced genomic instability and fewer driver gene mutations in tumors.
- Increased genetic risk correlated with improved patient outcomes, suggesting a protective effect against aggressive tumor evolution.
Conclusions:
- Germline genetic risk appears to influence prostate tumor molecular evolution, potentially through a polygenic "two-hit" model.
- Polygenic risk scores may serve as valuable, non-invasive adjuncts for prostate cancer risk stratification.
- Further research is needed to validate these findings in diverse ancestral and clinical populations.
Related Concept Videos
02:21Cancers Originate from Somatic Mutations in a Single Cell
12.4K
Cancer arises from mutations in the critical genes that allow healthy cells to escape cell cycle regulation and acquire the ability to proliferate indefinitely. Though originating from a single mutation event in one of the originator cells, cancer progresses when the mutant cell lines continue to gain more and more mutations, and finally, become malignant. For example, chronic myelogenous leukemia (CML) develops initially as a non-lethal increase in white blood cells, which progressively...
12.4K
01:33Cancer-Critical Genes I: Proto-oncogenes
9.1K
Genes usually encode proteins necessary for the proper functioning of a healthy cell. Mutations can often cause changes to the gene expression pattern, thereby altering the phenotype.
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...
9.1K
01:33Pleiotropy
40.8K
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,...
40.8K
01:11Genome-wide Association Studies-GWAS
13.9K
Genome-wide association studies or GWAS are used to identify whether common SNPs are associated with certain diseases. Suppose specific SNPs are more frequently observed in individuals with a particular disease than those without the disease. In that case, those SNPs are said to be associated with the disease. Chi-square analysis is performed to check the probability of the allele likely to be associated with the disease.
GWAS does not require the identification of the target gene involved in...
GWAS does not require the identification of the target gene involved in...
13.9K
01:43Incomplete Dominance
24.9K
Gregor Mendel's work (1822 - 1884) was primarily focused on pea plants. Through his initial experiments, he determined that every gene in a diploid cell has two variants called alleles inherited from each parent. He suggested that amongst these two alleles, one allele is dominant in character and the other recessive. The combination of alleles determines the phenotype of a gene in an organism.
24.9K
01:05Cancer-Critical Genes II: Tumor Suppressor Genes
7.6K
Genes usually encode proteins necessary for the proper functioning of a healthy cell. Mutations can often cause changes to the gene expression pattern, thereby altering the phenotype.
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...
7.6K