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Replicative Cell Senescence

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Replicative cell senescence is a property of cells that allows them to divide a finite number of times throughout the organism's lifespan while preventing excessive proliferation. Replicative senescence is associated with the gradual loss of the telomere — short, repetitive DNA sequences found at the end of the chromosomes. Telomeres are bound by a group of proteins to form a protective cap on the ends of chromosomes. Embryonic stem cells express telomerase — an enzyme that adds...
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How does a complex organism such as a human develop from a single cell? It all starts from a single fertilized egg which gives rise to a vast array of cell types, such as nerve cells, muscle cells, and epithelial cells that characterize the adult? Throughout development and adulthood, cellular differentiation leads cells to assume their final morphology and physiology. Differentiation is the process by which unspecialized cells become specialized to carry out distinct functions.
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Cellular Respiration01:18

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Cellular respiration is a crucial metabolic process through which cells obtain energy from organic substances, mainly glucose, to produce adenosine triphosphate (ATP). This process includes the oxidation of substrates and the transfer of electrons to a separate electron acceptor, facilitating ATP synthesis through a sequence of biochemical reactions.Glycolysis: The Initial StepGlycolysis is the first stage of cellular respiration, occurring in the cytoplasm of both prokaryotic and eukaryotic...
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Organisms harvest energy from food, but this energy cannot be directly used by cells. Cells convert the energy stored in nutrients into a more usable form: adenosine triphosphate (ATP).
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Drugs must traverse multiple biological barriers, such as multi-layered skin, single-layered intestinal epithelium, and the plasma membrane, to reach their target sites within the body. The plasma membrane, a highly structured composite of phospholipids, carbohydrates, and proteins, is the cell's protective boundary, facilitating selective substance exchange.
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Cancers arise due to mutations in genes involved in the regulation of cell division, which leads to unrestricted cell proliferation. Modern science and medicine have made great strides in the understanding and treatment of cancer, including eradicating cancer in some patients. However, there is still no cure for cancer. This is largely due to the fact that cancer is a large group of many diseases.
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Techniques to Induce and Quantify Cellular Senescence
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Cellular senescence in cancer.

Young Hwa Kim1, Tae Jun Park1

  • 1Department of Biochemistry and Molecular Biology, Ajou University School of Medicine, Suwon 16499, Korea.

BMB Reports
|December 12, 2018
PubMed
Summary

Cellular senescence, a state of irreversible cell growth arrest, contributes to age-related diseases. Understanding senescent cells and developing targeted therapies are crucial for future treatments.

Area of Science:

  • Cellular and Molecular Biology
  • Gerontology
  • Immunology

Background:

  • Cellular senescence is a key factor in age-related diseases.
  • Identifying senescent cells in tissues and their roles remains challenging.
  • Emerging research highlights the significance of senescent cells in pathological conditions.

Purpose of the Study:

  • To review the current understanding of senescent cells in pathological tissues.
  • To explore the role of the senescence-associated secretory phenotype (SASP).
  • To discuss novel therapeutic strategies targeting senescent cells.

Main Methods:

  • Literature review and synthesis of recent studies on cellular senescence.
  • Analysis of the impact of SASP on the tissue microenvironment.

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  • Discussion of senescent cell-targeted therapeutic approaches.

    • Main Results:

    • Senescent cells, though growth-arrested, release SASP factors that alter the microenvironment.
    • Senescent cells are increasingly recognized for their role in disease progression.
    • Targeting senescent cells presents a promising therapeutic avenue.

    Conclusions:

    • Cellular senescence plays a significant role in the pathogenesis of various diseases.
    • Further research into senescent cell identification and function is warranted.
    • Senescent cell-targeted therapies offer potential for treating age-related and other pathologies.