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Nucleic acids: interaction with solar UV radiation.

T M Murphy

    Current Topics in Radiation Research Quarterly
    |June 1, 1975
    PubMed
    Summary
    This summary is machine-generated.

    Atmospheric pollutants can increase harmful ultraviolet (UV) radiation reaching Earth, damaging cellular nucleic acids. Further research is needed to understand the full physiological impact of this increased UV exposure in living organisms.

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    Area of Science:

    • Environmental Science
    • Biochemistry
    • Molecular Biology

    Background:

    • Stratospheric ozone depletion allows more intermediate-wavelength ultraviolet (UV) radiation to reach Earth's surface.
    • This increased UV radiation, particularly UV-B (280-315 nm), can induce photochemical reactions in nucleic acids.

    Purpose of the Study:

    • To explore the photochemical reactions in nucleic acids caused by increased UV radiation.
    • To discuss the challenges in predicting in vivo effects due to cellular factors and repair mechanisms.
    • To highlight the need for further research on the physiological consequences of elevated solar UV exposure.

    Main Methods:

    • Utilized computer techniques to predict the effects of UV irradiation on purified nucleic acids in vitro.
    • Reviewed existing evidence on in vivo damage to cells and tissues from UV radiation.

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    Main Results:

    • Photochemical reactions in nucleic acids produce cyclobutadipyrimidines and strand breaks, altering their biological activity.
    • In vivo UV damage is complicated by cellular sensitizers and DNA repair processes.
    • Evidence suggests in vivo nucleic acid damage injures cells and tissues.

    Conclusions:

    • Increased solar UV radiation poses a risk to biological systems due to nucleic acid damage.
    • Predicting the precise physiological consequences of increased UV exposure requires further investigation into in vivo repair and sensitization mechanisms.