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Related Concept Videos

RNA Stability01:53

RNA Stability

Intact DNA strands can be found in fossils, while scientists sometimes struggle to keep RNA intact under laboratory conditions. The structural variations between RNA and DNA underlie the differences in their stability and longevity. Because DNA is double-stranded, it is inherently more stable. The single-stranded structure of RNA is less stable but also more flexible and can form weak internal bonds. Additionally, most RNAs in the cell are relatively short, while DNA can be up to 250 million...
RNA Stability01:53

RNA Stability

Intact DNA strands can be found in fossils, while scientists sometimes struggle to keep RNA intact under laboratory conditions. The structural variations between RNA and DNA underlie the differences in their stability and longevity. Because DNA is double-stranded, it is inherently more stable. The single-stranded structure of RNA is less stable but also more flexible and can form weak internal bonds. Additionally, most RNAs in the cell are relatively short, while DNA can be up to 250 million...
The DNA Replication Fork01:02

The DNA Replication Fork

An organism’s genome needs to be duplicated in an efficient and error-free manner for its growth and survival. The replication fork is a Y-shaped active region where two strands of DNA are separated and replicated continuously. The coupling of DNA unzipping and complementary strand synthesis is a characteristic feature of a replication fork.   Organisms with small circular DNA, such as E. coli, often have a single origin of replication; therefore, they have only two replication forks, one in...
DNA Damage can Stall the Cell Cycle02:36

DNA Damage can Stall the Cell Cycle

In response to DNA damage, cells can pause the cell cycle to assess and repair the breaks. However, the cell must check the DNA at certain critical stages during the cell cycle. If the cell cycle pauses before DNA replication, the cells will contain twice the amount of DNA. On the other hand, if cells arrest after DNA replication but before mitosis, they will contain four times the normal amount of DNA. With a host of specialized proteins at their disposal,cells must use the right protein at...
DNA Damage Can Stall the Cell Cycle02:36

DNA Damage Can Stall the Cell Cycle

In response to DNA damage, cells can pause the cell cycle to assess and repair the breaks. However, the cell must check the DNA at certain critical stages during the cell cycle. If the cell cycle pauses before DNA replication, the cells will contain twice the amount of DNA. On the other hand, if cells arrest after DNA replication but before mitosis, they will contain four times the normal amount of DNA. With a host of specialized proteins at their disposal,cells must use the right protein at...
mRNA Stability and Gene Expression02:51

mRNA Stability and Gene Expression

The structure and stability of mRNA molecules regulates gene expression, as mRNAs are a key step in the pathway from gene to protein. In eukaryotes, the half-life of mRNA varies from a few minutes up to several days. mRNA stability is essential in growth and development. The absence of the proteins regulating its stability, such as tristetraprolin in mice, can cause systemic issues, including bone marrow overgrowth, inflammation, and autoimmunity.
Cis-acting Elements involved in mRNA stability

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Iron and genome stability: an update.

Daniel Prá1, Silvia Isabel Rech Franke, João Antonio Pêgas Henriques

  • 1PPG em Promoção da Saúde, Universidade de Santa Cruz do Sul (UNISC), Santa Cruz do Sul, RS, Brazil. daniel pra@yahoo.com

Mutation Research
|February 22, 2012
PubMed
Summary
This summary is machine-generated.

Iron is vital for metabolic balance and genome stability. Emerging research suggests specific iron intakes may reduce cancer risk and improve DNA health, warranting further investigation into optimal levels.

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Area of Science:

  • Biochemistry
  • Nutritional Science
  • Genetics

Background:

  • Iron is essential for metabolic homeostasis and genome stability, involved in oxygen transport, respiration, and nucleic acid metabolism.
  • Both iron deficiency and overload can impair biological pathways, leading to oxidative stress, carcinogenesis, and genome instability.
  • Iron's reactivity with hydrogen peroxide generates hydroxyl radicals, causing DNA damage like adducts and strand breaks.

Purpose of the Study:

  • To explore the dual role of iron in maintaining metabolic homeostasis and genome stability.
  • To investigate the impact of iron deficiency and overload on cellular pathways and cancer risk.
  • To evaluate preliminary evidence on specific iron intakes and their potential effects on cancer risk and genome stability.

Main Methods:

  • Review of existing literature on iron's biological functions and effects on DNA.
  • Analysis of current Recommended Dietary Allowances (RDA) and Upper Levels (UL) for iron intake.
  • Examination of preliminary studies on iron intake, gastrointestinal cancer risk, and genome stability.

Main Results:

  • Iron deficiency impairs metabolic pathways, increasing oxidative stress and potential carcinogenesis.
  • Iron overload is linked to genome instability, DNA damage (adducts, strand breaks), hypermethylation, and reduced telomere length.
  • Preliminary data suggest an intake of 20mg/day may reduce gastrointestinal cancer risk and enhance genome stability in specific populations.

Conclusions:

  • Current dietary recommendations for iron primarily focus on preventing anemia and do not fully address genome stability.
  • Iron's influence on genome stability is critical, as DNA damage is fundamental to disease origin and progression.
  • Further research is recommended to precisely define the relationship between iron intake, genome stability, and cancer prevention.