title: Immunohistochemical and histopathological changes in the skin of rats after maneb application.
abstract: OBJECTIVE
  To determine the immunohistochemical and histopathological changes in facial skin after exposure to maneb (manganese ethylene bisdithiocarbamate), a fungicidal dithiocarbamate pesticide.
  
  
  METHODS
  In the experimental group maneb was administered by inhalation to 10 male Wistar albino rats for 5 days each week for 3 weeks. As a biological control, the control group (n = 10) received distilled water by spray for the same time period. The experiment was terminated after 3 weeks. Sections of rat facial skin were examined histopathologically.
  
  
  RESULTS
  In the experimental group, microscopic examination of facial skin revealed degeneration of the epidermis, detection of mild inflammatory reaction, and vascular dilation in the connective tissue. Hair follicles and degenerative changes were observed in the deeper parts. In the experimental group, dilation of the blood vessels in the dermis and hemorrhage were supported by an increase in CD34 expression. In addition, a reduction in the number of melanocytes (hypopigmentation) was observed in the hair follicles and epidermis, along with a decrease in the expression of CD117.
  
  
  CONCLUSIONS
  Epidermal degeneration, intradermal cell infiltration, vascular changes, and reduction in the number of melanocytes in the follicle and content of cytokeratin in both the epidermis and hair follicle keratinocytes were detected after maneb application. These findings may have important implications in the association with main signaling pathways, including keratinocyte proliferation and differentiation. Disruption of these pathways may cause some dermatoses.
authors: Bilal
authors: B
authors: Sula
authors: Cenap
authors: C
authors: Ekinci
authors: Haydar
authors: H
authors: Uçak
authors: Derya
authors: D
authors: Uçmak
authors: Zeynep Meltem
authors: ZM
authors: Akkurt
authors: Dilek
authors: D
authors: Yavuz
authors: Mustafa
authors: M
authors: Arica
authors: Engin
authors: E
authors: Deveci
mesh_terms: D000818:Animals; D018952:Antigens, CD34 / Q000096:biosynthesis; D001808:Blood Vessels / Q000187:drug effects / Q000473:pathology*; D004817:Epidermis / Q000187:drug effects; D005786:Gene Expression Regulation / Q000187:drug effects; D007249:Inflammation / Q000139:chemically induced / Q000235:genetics / Q000473:pathology*; D008297:Male; D008344:Maneb / Q000633:toxicity*; D008544:Melanocytes / Q000187:drug effects / Q000473:pathology; D019009:Proto-Oncogene Proteins c-kit / Q000096:biosynthesis; D051381:Rats; D012867:Skin / Q000187:drug effects* / Q000473:pathology
chemical_list: D018952:Antigens, CD34; D008344:Maneb; D019009:Proto-Oncogene Proteins c-kit