Abstract
Type 2 diabetes is a lifestyle-related disease that affects people worldwide and is especially prevalent in the elderly. Many elderly people with diabetes also complain of dry skin; however, the relationship between aging and dry skin in type 2 diabetes is unknown. The purpose of this study was to examine the interaction between aging and dry skin using the specific pathogen-free KK-Ay/TaJcl type 2 diabetes mouse model. Skin dryness in this model increases with age and was evaluated at 10, 27, 40, and 50 weeks. We observed increased mast cell expression, increased histamine and matrix metalloproteinase-1 levels, and decreased collagen expression in the skin of aging KK-Ay/TaJcl mice. In addition, the increased expression of angiopoietin 2, interleukin-6, tumor necrosis factor-α, and endostatin in the blood indicated kidney damage in this model. Aging KK-Ay/TaJcl mice also showed fatty liver pathology, which led to increased reactive oxygen species in the blood and liver, as well as the increased expression of M1 macrophages in the liver. These results showed that dry skin is associated with skin, kidney, and liver interactions in an aging type 2 diabetes mouse model.
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