Action spectrum and mechanisms of UV radiation-induced injury in lupus erythematosus

Journal Article · Mon Jul 01 00:00:00 EDT 1985 · J. Invest. Dermatol.; (United States)

DOI:https://doi.org/10.1111/1523-1747.ep12275658· OSTI ID:5176948

Kochevar, I E

Photosensitivity associated with lupus erythematosus (LE) is well established. The photobiologic basis for this abnormal response to ultraviolet radiation, however, has not been determined. This paper summarizes the criteria for elucidating possible photobiologic mechanisms and reviews the literature relevant to the mechanism of photosensitivity in LE. In patients with LE, photosensitivity to wavelengths shorter than 320 nm has been demonstrated; wavelengths longer than 320 nm have not been adequately evaluated. DNA is a possible chromophore for photosensitivity below 320 nm. UV irradiation of skin produces thymine photodimers in DNA. UV-irradiated DNA is more antigenic than native DNA and the antigenicity of UV-irradiated DNA has been proposed, but not proven, to be involved in the development of clinical lesions. UV irradiation of mice previously injected with anti-UV-DNA antibodies produces Ig deposition and complement fixation that appears to be similar to the changes seen in lupus lesions. Antibodies to UV-irradiated DNA occur in the serum of LE patients although a correlation between antibody titers and photosensitivity was not observed. Defective repair of UV-induced DNA damage does not appear to be a mechanism for the photosensitivity in LE. Other mechanisms must also be considered. The chromophore for photosensitivity induced by wavelengths longer than 320 nm has not been investigated in vivo. In vitro studies indicate that 360-400 nm radiation activates a photosensitizing compound in the lymphocytes and serum of LE patients and causes chromosomal aberrations and cell death. The mechanism appears to involve superoxide anion.

• Research Organization: Harvard Medical School, Boston, MA (United States)
• OSTI ID: 5176948
• Journal Information: J. Invest. Dermatol.; (United States), Journal Name: J. Invest. Dermatol.; (United States)
• Country of Publication: United States
• Language: English

Related Subjects

63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
62 RADIOLOGY AND NUCLEAR MEDICINE
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RADIOTHERAPY
LYMPHOCYTES
RADIOSENSITIVITY
ANTIBODIES
DNA
DNA REPAIR
MICE
PATIENTS
PHOTOCHEMISTRY
RADIATION INJURIES
ULTRAVIOLET RADIATION
ANIMAL CELLS
ANIMALS
BACTERIAL DISEASES
BIOLOGICAL EFFECTS
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BIOLOGICAL RADIATION EFFECTS
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BLOOD
BLOOD CELLS
BODY FLUIDS
CHEMISTRY
CONNECTIVE TISSUE CELLS
DISEASES
ELECTROMAGNETIC RADIATION
INFECTIOUS DISEASES
INJURIES
LEUKOCYTES
MAMMALS
MATERIALS
MEDICINE
NUCLEAR MEDICINE
NUCLEIC ACIDS
ORGANIC COMPOUNDS
RADIATION EFFECTS
RADIATIONS
RADIOLOGY
RECOVERY
REPAIR
RODENTS
SKIN DISEASES
SOMATIC CELLS
THERAPY
TUBERCULOSIS
VERTEBRATES
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