Experimental model of actinic keratosis due to exposure to ultraviolet A radiation

Authors

  • Liuba Peñate Alvariño Unidad de Toxicología Experimental. Universidad de Ciencias Médicas de Villa Clara. Cuba
  • Grety Margarita Garau Hospital Provincial “Arnaldo Milián Castro”. Villa Clara. Cuba
  • Arianna Valido Díaz Unidad de Toxicología Experimental. Universidad de Ciencias Médicas de Villa Clara. Cuba
  • Arletis Ferrer Pérez Hospital Provincial “Arnaldo Milián Castro”. Villa Clara. Cuba
  • Yisel González Madariaga Unidad de Toxicología Experimental. Universidad de Ciencias Médicas de Villa Clara. Cuba
  • Deodelsy Bermúdez Toledo Unidad de Toxicología Experimental. Universidad de Ciencias Médicas de Villa Clara. Cuba

DOI:

https://doi.org/10.46583/nereis_2021.13.841

Keywords:

solar keratosis, preneoplastic lesion, Balb/c mice

Abstract

Actinic keratoses are frequent preneoplastic skin lesions caused by chronic exposure to solar radiation. Obtaining animal models that contribute to understanding the mechanisms involved in this pathology and evaluating new pharmacological therapies is of great interest to the scientific community. A biomodel of actinic keratosis was developed in Balb/c mice, using UVA radiation as an inducer. Two irradiation schemes were applied: Group I, exposed to three daily radiation sessions of 2h and Group II, two daily sessions of 4h, with the same break time between sessions and for a period of 14 days. Macroscopic and microscopic parameters were evaluated, as well as the frequency of appearance of micronuclei in peripheral blood. The animals corresponding to Group I did not show mascroscopic lesions and microscopically they showed a slight acanthosis with the absence of dysplasia; while in Group II animals macroscopic lesions were observed that histopathologically correlate with the presence of an actinic keratosis. The frequency of micronuclei obtained in Group II was significantly higher than the formation of spontaneous micronuclei in the Control Group. The experimental biomodel of actinic keratosis obtained reproduces the effect of ultraviolet radiation on the skin.

 

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Published

2021-11-15