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The Periodic Table and Organismal Elements01:27

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Elements are the smallest units of matter that cannot be broken down further by chemical processes. There are 118 known elements, but not all of these are naturally occurring, and only a few of them are essential for life. Living matter is composed primarily of carbon, nitrogen, hydrogen, and oxygen, with smaller amounts of other elements like calcium, phosphorus, potassium, and sulfur. Other elements are also necessary for life but only in trace amounts.
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Mercury: selenium interactions and health implications.

Laura J Raymond1, Nicholas V C Ralston1

  • 1University of North Dakota, Grand Forks, North Dakota, USA.

Neurotoxicology
|May 19, 2022
PubMed
Summary
This summary is machine-generated.

Selenium protects against mercury toxicity by binding to it, but mercury can also sequester selenium, impacting essential enzyme functions. Understanding this mercury-selenium interaction is crucial for assessing health risks.

Keywords:
bioavailabilitymercurymercury toxicitymercury-selenidepathophysiologyseleniumselenium deficiencyselenocysteineselenoenzymes

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An Anaerobic Biosensor Assay for the Detection of Mercury and Cadmium
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Area of Science:

  • Environmental Science
  • Toxicology
  • Biochemistry

Background:

  • Mercury exposure poses health risks, but its assessment may be incomplete without considering selenium's role.
  • Selenium is integral to the mercury cycle, affecting its transport, bioavailability, and toxicological outcomes.
  • Selenium in foods like fish is known to offer protection against mercury exposure.

Purpose of the Study:

  • To explore the intricate relationship between mercury and selenium.
  • To elucidate how the mercury-selenium binding interaction influences health risks and protective mechanisms.
  • To understand the implications of mercury-selenium interactions on selenium-dependent enzyme activity.

Main Methods:

  • Literature review and synthesis of existing research on mercury-selenium interactions.
  • Analysis of the biogeochemical and toxicological consequences of mercury-selenium binding.
  • Examination of how mercury affects selenium bioavailability and enzyme function.

Main Results:

  • Selenium sequesters mercury, reducing its bioavailability and potential toxicity.
  • Mercury sequesters selenium, forming insoluble mercury-selenides that inhibit selenium-dependent enzymes.
  • High-affinity binding characterizes the mercury-selenium interaction, with reciprocal effects.

Conclusions:

  • The mercury-selenium interaction is a critical factor in determining mercury's health impact.
  • Understanding this binding is essential for identifying populations at risk or protected from mercury toxicity.
  • Further research into mercury-selenium interactions will refine risk assessment and protective strategies.