DNA damage
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«DNA repair is a collection of processes by which a cell identifies and corrects damage to the DNA molecules that encode its genome[1]. In human cell, both normal metabolic activities and environmental factors such as radiation can cause DNA damage, resulting in as many as 1 million individual molecular lesions per cell per day.[2] Many of these lesions cause structural damage to the DNA molecule and can alter or eliminate the cell's ability to transcribe the gene that the affected DNA encodes. Other lesions induce potentially harmful mutations in the cell's genome, which affect the survival of its daughter cell after it undergoes mitosis. As a consequence, the DNA repair process is constantly active as it responds to damage in the DNA structure. When normal repair processes fail, and when cellular apoptosis does not occur, irreparable DNA damage may occur, including double-strand breaks and DNA crosslinkages (interstrand crosslinks or ICLs).[3][4] This can eventually lead to malignant tumors, or cancer as per the two hit hypothesis.
The rate of DNA repair is dependent on many factors, including the cell type, the age of the cell, and the extracellular environment. A cell that has accumulated a large amount of DNA damage, or one that no longer effectively repairs damage incurred to its DNA, can enter one of three possible states:
The DNA repair ability of a cell is vital to the integrity of its genome and thus to the normal functionality of that organism. Many genes that were initially shown to influence life span have turned out to be involved in DNA damage repair and protection.[5]
The 2015 Nobel Prize in Chemistry was awarded to Tomas Lindahl, Paul Modrich, and Aziz Sancar for their work on the molecular mechanisms of DNA repair processes.[6][7]» (wikipedia)
Summary on DNA damage
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Pathways of DNA damage
Evidence Sources
Biolinks for DNA damage are extracted by users from 20 related publications.-
2007RCT
- Organism: Humans
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2011Cohort
- Organism: Humans
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2012RCT
- Organism: Humans
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2013RCT
- Organism: Humans
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2008RCT
- Condition: in lymphocyte
- Organism: Humans
- Notable Magnitude of Effect.
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2019Cohort
- Organism: Humans
- Minor Magnitude of Effect.
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2010Cohort
- Organism: Humans
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2013
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2017Publications Review
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2017Publications Review
- Strong Magnitude of Effect.
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2017Publications Review
- Strong Magnitude of Effect.
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2017
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2018
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2001
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2011
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- See 21 Biolinks that connect DNA damage with other objects
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- There are 20 Evidences supporting 21 DNA damage Biolinks
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- Promoters of DNA damage
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