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Related Concept Videos

Aging01:26

Aging

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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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The cellular clock theory posits that the human lifespan is closely tied to the finite capacity of cells to divide, a phenomenon governed by telomeres, which are protective caps at the ends of...
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The circadian—or biological—clock is an intrinsic, timekeeping, molecular mechanism that allows plants to coordinate physiological activities over 24-hour cycles called circadian rhythms. Photoperiodism is a collective term for the biological responses of plants to variations in the relative lengths of dark and light periods. The period of light-exposure is called the photoperiod.
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The biological clock is involved in many aspects of regulating complex physiology in all animals. It was in 1935 when German zoologists, Hans Kalmus and Erwin Bünning, discovered the existence of circadian rhythm in Drosophila melanogaster. However, the internal molecular mechanisms behind the circadian clock remained a mystery until 1984, when Jeffrey C. Hall, Michael Rosbash, and Michael W. Young discovered the expression of the Per gene oscillating over a 24-hour cycle. In subsequent...
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Mitochondria are eukaryotic cellular organelles that are known to produce energy through a process called oxidative phosphorylation. Besides their primary function, mitochondria are involved in various cellular processes, including cell growth, differentiation, signaling, metabolism, and senescence. Age-related changes cause a decline in mitochondrial quality and integrity due to increased mitochondrial mutations and oxidative damage. Thus, aging can severely impact mitochondrial functions,...
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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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Updated: Sep 9, 2025

Parallel Measurement of Circadian Clock Gene Expression and Hormone Secretion in Human Primary Cell Cultures
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Metabolomic-based aging clocks.

A Ibáñez de Opakua1, R Conde2, A de Diego2

  • 1ATLAS Molecular Pharma, Parque Tecnológico de Bizkaia, Ed. 800, 48160, Derio, Spain.

Npj Metabolic Health and Disease
|September 3, 2025
PubMed
Summary
This summary is machine-generated.

Molecular aging clocks, like NMR-based metabolomic clocks, predict health outcomes better than chronological age. A new approach enhances accuracy and interpretability for accelerated aging detection.

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Area of Science:

  • Biomarkers and Healthspan Research
  • Metabolomics and Aging Science

Background:

  • Molecular aging clocks estimate biological age, outperforming chronological age in health outcome prediction.
  • Epigenetic, transcriptomic, proteomic, and metabolomic clocks are key types.
  • NMR-based metabolomic clocks offer non-invasive, high-throughput metabolic health assessment.

Purpose of the Study:

  • To summarize existing NMR-based metabolomic aging clock models.
  • To introduce a novel NMR-based approach for aging clock development.
  • To improve predictive accuracy and clinical interpretability of biological age estimation.

Main Methods:

  • Review and synthesis of current NMR-based metabolomic clock literature.
  • Development of a new computational model integrating metabolomic data.
  • Validation of the model for predicting accelerated aging and disease risk.

Main Results:

  • Identified key NMR-based metabolomic signatures associated with biological aging.
  • The new approach demonstrates high predictive accuracy for biological age.
  • The model successfully identifies disease-specific metabolic distortions.

Conclusions:

  • NMR-based metabolomic clocks are valuable tools for assessing metabolic health and biological age.
  • The presented approach enhances the clinical utility of aging clocks.
  • This method supports risk stratification and early detection of accelerated aging.