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Related Concept Videos

Types of Toxins01:36

Types of Toxins

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Humans continually engage with an environment rich in potentially harmful chemicals. These are introduced to our bodies through inhalation, ingestion, or skin contact. These chemicals exist in various forms, such as air and environmental pollutants, agricultural chemicals, organic solvents, and heavy metals.
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Environmental pollutants like...
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Toxic Reactions: Overview01:26

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When toxic substances penetrate the human body, they disseminate to various tissues, undergoing metabolic changes. This process yields reactive metabolites that may covalently bind with specific target molecules, resulting in toxicity.
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Effects of Chemicals: Overview01:27

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Drugs, encompassing various chemical compounds from natural sources, lab synthesis, or genetic engineering, elicit different biological responses in living organisms. Some of these responses are desirable or therapeutic, while others are undesirable. The primary goal of administering a drug is to achieve a therapeutic effect, that is, to address a specific disease or health condition. Any concurrent effects outside of this therapeutic outcome are considered undesirable. These undesirable...
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Mutagenicity and carcinogenicity refer to the ability of drugs to cause genetic defects and induce cancer, respectively. The International Agency for Research on Cancer (IARC) classifies agents into four groups based on their carcinogenic potential. Group 1 agents are known human carcinogens; group 2A agents are probably carcinogenic to humans; group 3 agents lack data to support their role in carcinogenesis; and group 4 includes agents for which data support that they are not likely to be...
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All radioactive nuclides emit high-energy particles or electromagnetic waves. When this radiation encounters living cells, it can cause heating, break chemical bonds, or ionize molecules. The most serious biological damage results when these radioactive emissions fragment or ionize molecules. For example, α and β particles emitted from nuclear decay reactions possess much higher energies than ordinary chemical bond energies. When these particles strike and penetrate matter, they...
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Strategies for Assessing and Addressing Confounding01:25

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Confounding is a critical issue in epidemiological studies, often leading to misleading conclusions about associations between exposures and outcomes. It occurs when the relationship between the exposure and the outcome is mixed with the effects of other factors that influence the outcome. Given that, addressing confounding is of high importance for drawing accurate inferences in research.
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Assessing How Chemical Exposures Affect Human Health.

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Characterizing human chemical exposure requires advanced methods. New tools are needed for measuring small molecules to understand their health impacts.

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Area of Science:

  • Environmental health sciences
  • Toxicology
  • Biomolecular analysis

Background:

  • Human exposure to diverse anthropogenic molecules presents measurement challenges.
  • Understanding chemical impacts on health necessitates multi-omics approaches.
  • Genomic, transcriptomic, and proteomic analysis tools have advanced significantly.

Purpose of the Study:

  • To highlight the need for improved methods in chemical exposure assessment.
  • To emphasize the importance of non-targeted small molecule measurements for human health studies.

Main Methods:

  • Review of current multi-omics measurement techniques.
  • Identification of technological gaps in xenobiotic and endogenous metabolite analysis.

Main Results:

  • Genomic, transcriptomic, and proteomic analyses are well-developed.
  • Significant advancements are required in instrumentation and computation for small molecule analysis.

Conclusions:

  • Further development in non-targeted small molecule measurement is crucial for comprehensive chemical exposure assessment.
  • Enhanced analytical capabilities will improve understanding of chemical exposures and human health outcomes.