Elastic ear cartilage of Acomys mice is recovering after injury

Abstract

The article presents data on the regeneration of the auricle tissues of Acomys cahirinus mice (n=12) and Balb/c mice (n=12). Two experimental models were used: a full-thickness perforated defect with a diameter of 3 mm and subtotal removal of the auricle. Macrophotography and histological examination using general histological stains and detection of elastic fibers were performed after 2, 5, 15, 21, 30, 60, 90, and 120 days. It was found that regeneration in Acomys is more pronounced, which manifested itself in the complete elimination of the defect by 30-60 days in contrast to the control (Balb/c). A feature of this was less pronounced post-traumatic inflammation in Acomys mice. It was established the growth of a full-fledged auricle in case of its surgical removal. An important feature of regeneration in this case is the development of new cartilage tissue both from the edges of the original cartilage and developed in the form of separate islands of cartilage tissue. The newly formed cartilage was characterized by high cel-lularity, a smaller volume of the matrix, in the structure of which elastic fibers were formed. However, it should be noted that within 30-60 days. the recovery process, apparently, is not completed, the formed tissue regenerate enters the remodeling phase.