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Related Concept Videos

Overview of Cell Death01:30

Overview of Cell Death

Cell death is an essential process where the body gets rid of old or damaged cells. Cell proliferation and death need to be balanced, as an imbalance between the two may lead to cancer or autoimmune diseases.
Cell death was observed in the early 19th century, but there was no experimental evidence to prove it. In 1842, Carl Vogt first discovered cell death in a metamorphic toad; however, it was not termed ‘cell death.’ Scientists discovered different cell death pathways only in the 20th century...
Apoptosis01:30

Apoptosis

Apoptosis is a combination of two Greek words, 'apo' and 'ptosis,' meaning separation and falling off, respectively. Hippocrates used this word to describe gangrene, which was caused due to bandaging of fractured bones. Apoptosis was distinguished from necrosis in 1970 when John Kerr reported observations of morphological changes occurring during apoptosis. During one experiment, he observed that the disruption of blood supply to the liver tissue resulted in a size reduction of the tissue.
The Extrinsic Apoptotic Pathway01:17

The Extrinsic Apoptotic Pathway

The extrinsic apoptotic pathway is initiated when extracellular death-inducing signals, such as specific cytokines, activate the death receptors expressed on the cell surface. The immune cells involved in this pathway are natural killer cells (NK cells) and cytotoxic T-lymphocytes. NK cells are critical in innate immune response, while cytotoxic T-lymphocytes are associated with adaptive immune response. These cells recognize specific receptors expressed on the altered cells and activate...
Anorexia Nervosa01:28

Anorexia Nervosa

Anorexia nervosa is a complex and severe eating disorder characterized by an intense fear of weight gain, an unrelenting pursuit of thinness, and a distorted body image. It often leads to dangerously low body weight relative to an individual's age and height. This disorder is marked by significant physical and psychological consequences, making it one of the most life-threatening psychiatric illnesses.
Symptoms and Physical Effects
Individuals with anorexia nervosa commonly exhibit extreme...
The Intrinsic Apoptotic Pathway01:31

The Intrinsic Apoptotic Pathway

Internal cellular stress, such as cellular injury or hypoxia, triggers intrinsic apoptosis. The B-cell lymphoma 2 (Bcl-2) family of proteins are the primary regulators of the intrinsic apoptotic pathway. For example, during DNA damage, checkpoint proteins, such as Ataxia Telangiectasia Mutated (ATM protein) and Checkpoints Factor-2 (Chk2) proteins, are activated. These proteins phosphorylate p53 which further activates pro-apoptotic proteins, such as Bax, Bak, PUMA, and Noxa, and inhibits...
Autophagic Cell Death01:18

Autophagic Cell Death

Christian de Duve discovered “autophagy,” a process in which cellular components are engulfed by membrane-bound organelles called autophagosomes. The autophagosomes then fuse with lysosomes to digest the enclosed contents. Autophagy is generally activated in cells to prevent cell death. However, cell death is triggered when the damage is beyond repair.
Autophagy and Apoptosis
Autophagy can activate apoptosis. In normal conditions, the autophagy activating protein Beclin-1 and pro-apoptotic...

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Related Experiment Video

Updated: Jun 3, 2026

Detecting Anastasis In Vivo by CaspaseTracker Biosensor
20:16

Detecting Anastasis In Vivo by CaspaseTracker Biosensor

Published on: February 1, 2018

Stress influences on anoikis.

Anil K Sood1, Susan K Lutgendorf

  • 1Department of Gynecologic Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX 77230, USA. asood@mdanderson.org

Cancer Prevention Research (Philadelphia, Pa.)
|April 6, 2011
PubMed
Summary

Psychosocial factors, like chronic stress and depression, can promote cancer progression by helping cancer cells evade programmed cell death (anoikis). This review explores these links and their impact on metastasis.

Area of Science:

  • Oncology
  • Psychoneuroimmunology
  • Molecular Biology

Background:

  • Psychosocial factors are increasingly recognized for their role in cancer progression.
  • While direct links to cancer causation are weak, chronic stress, depression, and social isolation correlate with poorer outcomes.
  • Emerging molecular evidence reveals mechanisms by which these factors influence cancer.

Purpose of the Study:

  • To review the relationship between psychosocial factors and cancer progression.
  • To examine the role of stress hormones in preventing anoikis (programmed cell death) in cancer cells.
  • To provide an overview of the molecular mechanisms linking psychosocial stress to cancer metastasis.

Main Methods:

  • Literature review of epidemiologic, clinical, molecular, and biological studies.

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Strategies for Tracking Anastasis, A Cell Survival Phenomenon that Reverses Apoptosis
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Strategies for Tracking Anastasis, A Cell Survival Phenomenon that Reverses Apoptosis

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Identification of Intracellular Signaling Events Induced in Viable Cells by Interaction with Neighboring Cells Undergoing Apoptotic Cell Death
09:18

Identification of Intracellular Signaling Events Induced in Viable Cells by Interaction with Neighboring Cells Undergoing Apoptotic Cell Death

Published on: December 27, 2016

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Last Updated: Jun 3, 2026

Detecting Anastasis In Vivo by CaspaseTracker Biosensor
20:16

Detecting Anastasis In Vivo by CaspaseTracker Biosensor

Published on: February 1, 2018

Strategies for Tracking Anastasis, A Cell Survival Phenomenon that Reverses Apoptosis
12:55

Strategies for Tracking Anastasis, A Cell Survival Phenomenon that Reverses Apoptosis

Published on: February 16, 2015

Identification of Intracellular Signaling Events Induced in Viable Cells by Interaction with Neighboring Cells Undergoing Apoptotic Cell Death
09:18

Identification of Intracellular Signaling Events Induced in Viable Cells by Interaction with Neighboring Cells Undergoing Apoptotic Cell Death

Published on: December 27, 2016

  • Analysis of signaling pathways involved in cancer growth and metastasis.
  • Focus on the protective effects of stress hormones against anoikis.

    • Main Results:

    • Stress hormones can protect cancer cells from anoikis, a key step in metastasis.
    • Chronic stress, depression, and social isolation are linked to enhanced cancer progression.
    • Specific molecular pathways mediate the impact of psychosocial factors on cancer cell survival.

    Conclusions:

    • Psychosocial factors significantly influence cancer progression, particularly by promoting metastasis.
    • Understanding the molecular mechanisms of stress-induced anoikis resistance is crucial for developing new therapies.
    • Targeting stress pathways may offer novel strategies to improve cancer treatment outcomes.