Go to the website http://www.ncbi.nlm.nih.gov/omim and enter 'Lynch syndrome' in the Search box at the top of the page. From the list of options given, select '#120435—Lynch Syndrome.' Use the information you retrieve to answer the following questions. What genes are most commonly mutated in Lynch syndrome?

검증된 단계별 안내

Understand that Lynch syndrome is a hereditary condition associated with a higher risk of certain types of cancer, particularly colorectal cancer, caused by mutations in specific genes involved in DNA mismatch repair.

Go to the website http://www.ncbi.nlm.nih.gov/omim and enter 'Lynch syndrome' in the search box to access detailed genetic information about the syndrome.

From the search results, select the entry labeled '#120435—Lynch Syndrome' to view the curated genetic data related to this condition.

Review the gene section in the entry, which lists the genes most commonly mutated in Lynch syndrome. These genes typically include those involved in the DNA mismatch repair pathway.

Note the names of the key genes, such as MLH1, MSH2, MSH6, and PMS2, which are frequently reported as mutated in individuals with Lynch syndrome.

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주요 개념

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Lynch Syndrome

Lynch syndrome is an inherited disorder that increases the risk of colorectal cancer and other cancers. It is caused by mutations in genes responsible for DNA mismatch repair, leading to genetic instability. Understanding this syndrome helps in identifying at-risk individuals and guiding genetic testing.

DNA Mismatch Repair Genes

DNA mismatch repair (MMR) genes encode proteins that correct errors during DNA replication. Mutations in these genes impair repair mechanisms, causing accumulation of mutations and cancer development. Key MMR genes include MLH1, MSH2, MSH6, and PMS2, which are commonly mutated in Lynch syndrome.

Genetic Mutation and Cancer Risk

Mutations in specific genes can disrupt normal cellular functions and increase cancer susceptibility. In Lynch syndrome, inherited mutations in MMR genes lead to microsatellite instability and tumor formation. Recognizing these mutations is crucial for diagnosis, risk assessment, and preventive strategies.