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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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Aging01:26

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Aging is a complex biological phenomenon influenced by various processes that affect cellular and systemic functions. Several prominent theories attempt to explain its mechanisms, highlighting cellular limitations, oxidative damage, and hormonal changes as central factors in aging.
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Several body functions deteriorate with age. The external signs of aging are easily identifiable. For example, the skin becomes dry, less elastic, and thins out, forming wrinkles. The skin of the face begins to appear looser due to a decrease in the levels of elastic and collagen fibers in the connective tissue. Additionally, melanin production in the hair follicle decreases with age, resulting in gray hair. Moreover, the senses of sight and hearing decline, so glasses and hearing aids may...
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Directly acting muscle relaxants like dantrolene and botulinum toxin (BoNT) have distinct mechanisms and applications. Dantrolene, a hydantoin derivative, acts on the ryanodine receptor (RYR1) in skeletal muscle cells. RYR1 are calcium channels present at the sarcoplasmic reticulum membrane. In response to excitation, they release calcium ions from the sarcoplasmic reticulum to the cytosol. Calcium promotes actin-myosin-mediated contraction of muscles.
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Visualization of Bacterial Toxin Induced Responses Using Live Cell Fluorescence Microscopy
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Toxin-induced hormesis may restrain aging.

Trim Lajqi1, Milan Stojiljkovic2, Reinhard Wetzker3

  • 1Institute of Molecular Cell Biology, Center for Molecular Biomedicine (CMB), Jena University Hospital, Jena, Germany.

Biogerontology
|March 22, 2019
PubMed
Summary
This summary is machine-generated.

Mild environmental stress, like toxins, can activate cellular repair, aligning with hormesis. Low doses of certain toxins may slow aging by influencing key signaling pathways.

Keywords:
AMPKATMAgingArsenicCadmiumHormesisPI3KToxinsmTOR

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Area of Science:

  • Gerontology and Toxicology
  • Cellular Biology and Molecular Mechanisms

Background:

  • Mild environmental stress can activate cellular maintenance and repair processes.
  • This phenomenon aligns with the concept of hormesis, where beneficial stress responses occur.
  • Known hormetic stressors include exercise, fasting, and temperature extremes.

Purpose of the Study:

  • To review toxins that induce hormetic responses in animal aging models.
  • To elucidate the molecular pathways affected by low-dose toxin exposure.
  • To explore the potential of low-dose toxins in modulating aging processes.

Main Methods:

  • Review of existing literature on toxins and hormesis in aging research.
  • Analysis of molecular signaling pathways influenced by low-dose toxins.
  • Focus on PI3K/Akt/mTOR and AMPK signaling in cellular and organismic contexts.

Main Results:

  • Certain toxins, at low doses, have demonstrated hormetic effects in animal models.
  • Low-dose toxins impact key signaling pathways, including PI3K/Akt/mTOR and AMPK.
  • These pathways are critically involved in both aging and cellular responses to toxins.

Conclusions:

  • There is a significant overlap between signaling pathways mediating toxin responses and aging.
  • Low-dose toxin exposure may represent a novel strategy to slow the aging rate.
  • Further research into hormetic effects of toxins could offer new aging interventions.