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Related Concept Videos

Regulation of Heart Rates01:31

Regulation of Heart Rates

The regulation of heart rate is a complex process controlled by the autonomic nervous system (ANS), hormonal influences, and intrinsic cardiac mechanisms. The ANS has two main components: the sympathetic nervous system (SNS) and the parasympathetic nervous system (PNS).
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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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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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Related Experiment Video

Updated: May 12, 2026

Semi-automated Optical Heartbeat Analysis of Small Hearts
12:10

Semi-automated Optical Heartbeat Analysis of Small Hearts

Published on: September 16, 2009

Heartbeats and hidden codes: Decoding cardiac aging with multi-omics and computational approaches.

Smin L Liu1, Li Qian1

  • 1Department of Pathology and Laboratory Medicine, McAllister Heart Institute, School of Medicine, University of North Carolina, Chapel Hill, NC 27599, United States.

Journal of Molecular and Cellular Cardiology
|May 10, 2026
PubMed
Summary
This summary is machine-generated.

Aging impacts heart health, with single-cell studies revealing fibroblasts and macrophages undergo significant age-related changes. These findings pave the way for understanding cardiac aging mechanisms.

Keywords:
Cardiac agingComputational modelingMachine learningMutli-omicsSingle cell

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Area of Science:

  • Cardiovascular Biology
  • Aging Research
  • Genomics

Background:

  • Aging is a primary risk factor for cardiovascular disease.
  • Bulk omics analyses mask crucial cell-type-specific variations in cardiac aging.
  • Understanding cellular heterogeneity is key to defining age-related cardiac decline.

Purpose of the Study:

  • To investigate cell-type-specific molecular changes in the aging heart.
  • To identify cellular mechanisms underlying age-related cardiac dysfunction.
  • To leverage single-cell multi-omics for high-resolution cardiac aging insights.

Main Methods:

  • Single-cell multi-omics profiling (gene expression and chromatin accessibility).
  • Comparative analysis of cardiac cell lineages in aging.
  • Integration of machine learning and language models for data analysis.

Main Results:

  • Fibroblasts and macrophages show pronounced age-associated remodeling.
  • Key changes include increased senescence and disrupted intercellular communication.
  • Reduced chromatin accessibility was observed in specific aging cardiac cell types.

Conclusions:

  • Single-cell multi-omics reveals fibroblast and macrophage vulnerabilities in cardiac aging.
  • Computational tools are essential for analyzing complex single-cell data.
  • Animal models are crucial for validating cell-type-specific findings in vivo.