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Related Concept Videos

Cancer Therapies02:49

Cancer Therapies

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Cancer therapies are various modes of treatment, such as surgery, radiation therapy, and chemotherapy that are administered to cancer patients.
However, cancer treatments can pose several challenges, as therapies used to kill cancer cells are generally also toxic to normal cells. Moreover, cancer cells mutate rapidly and can develop resistance to chemical agents or radiation therapy. Besides, all types of cancer cells may not respond to the same therapy. Some cancer cells respond to one...
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Adaptive Mechanisms in Cancer Cells02:53

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Cancer cells accumulate genetic changes at an abnormally rapid rate due to the defects in the DNA repair mechanisms. From an evolutionary perspective, such genetic instability is advantageous for cancer development. Mutant cell lines accumulate a series of beneficial mutations that contribute to their progression into cancer.
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Hypoxia01:23

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Hypoxia is a medical condition characterized by an inadequate oxygen supply to body tissues. It typically manifests as a bluish discoloration of the skin and mucosae, especially in fair-skinned individuals, when hemoglobin (Hb) saturation drops below 75%.
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Regulation of Angiogenesis and Blood Supply01:24

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Rapidly dividing tumors, embryos, and wounded tissues require more oxygen than usual, lowering the oxygen concentration in the blood. At low oxygen or hypoxic conditions, an oxygen-sensitive transcription factor called the hypoxia-inducible factor 1 or HIF1 is activated. HIF1 is a dimeric protein of alpha (ɑ) and beta (β) subunits.  Under optimal oxygen conditions, HIF1β is present in the nucleus while HIF1ɑ remains in the cytosol. HIF1ɑ is hydroxylated by prolyl...
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Tumor Progression02:07

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Tumor progression is a phenomenon where the pre-formed tumor acquires successive mutations to become clinically more aggressive and malignant. In the 1950s, Foulds first described the stepwise progression of cancer cells through successive stages.
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Tumor Immunotherapy01:27

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Immunotherapy is a treatment that boosts or manipulates the immune system to fight diseases, including cancer. For instance, by stimulating an immune response through vaccinations against viruses that cause cancers, like hepatitis B virus and human papillomavirus, these diseases can be prevented. Nonetheless, some cancer cells can avoid the immune system due to their rapid mutation and division. The immune response to many cancers involves three phases: elimination, equilibrium, and escape.
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Updated: Feb 24, 2026

In Vivo Model for Testing Effect of Hypoxia on Tumor Metastasis
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In Vivo Model for Testing Effect of Hypoxia on Tumor Metastasis

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Systemic hypoxia suppresses solid tumor growth.

Ayush D Midha, Brandon T L Chew, Benedict M H Choi

    Biorxiv : the Preprint Server for Biology
    |February 23, 2026
    PubMed
    Summary
    This summary is machine-generated.

    Systemic hypoxia, unlike localized tumor hypoxia, inhibits cancer growth by suppressing purine synthesis. This novel approach, achievable with HypoxyStat, offers a potential therapeutic strategy against solid tumors.

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    Tumor Hypoxia Assessment: In Vivo 3D Oxygen Imaging Through Electron Paramagnetic Resonance
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    Tumor Hypoxia Assessment: In Vivo 3D Oxygen Imaging Through Electron Paramagnetic Resonance

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    Area of Science:

    • Oncology
    • Metabolic pathways
    • Cancer biology

    Background:

    • Local hypoxia is a known negative prognostic factor in cancer.
    • The role of systemic hypoxia in tumor progression has been less understood.

    Purpose of the Study:

    • To investigate the effect of systemic hypoxia on tumor growth.
    • To elucidate the underlying mechanisms of systemic hypoxia's impact on cancer.
    • To explore the therapeutic potential of systemic hypoxia.

    Main Methods:

    • In vivo studies across multiple cancer types and preclinical models.
    • Metabolite profiling of tumors and interstitial fluid.
    • Stable isotope tracing to track metabolic pathways.
    • Pharmacological induction of systemic hypoxia using HypoxyStat.

    Main Results:

    • Systemic hypoxia significantly decreased tumor growth across various cancer types.
    • Reduced tumor growth was linked to suppressed de novo purine synthesis, not hypoglycemia or HIF activation.
    • Tumors did not develop resistance to systemic hypoxia.
    • Combination therapy with chemotherapy or immunotherapy enhanced tumor suppression.

    Conclusions:

    • Systemic hypoxia represents a novel therapeutic strategy for solid tumors, challenging the traditional view of hypoxia.
    • Suppression of purine synthesis is a key mechanism by which systemic hypoxia inhibits cancer growth.
    • Pharmacological induction of systemic hypoxia offers a promising avenue for cancer treatment.