Abstract
The epidermal changes that occur in human cutaneous immune responses have been investigated in the tuberculin reaction and in the lesions of tuberculoid and lepromatous leprosy and cutaneous leishmaniasis. In each situation, there was a dermal accumulation of monocytes and T cells, and the epidermis exhibited thickening. In the tuberculin response, the thickness of the epidermis sometimes doubled in 48-72 hr, and this was attributed to increases in both size and number of keratinocytes. In addition, the phenotype of the keratinocytes changed from Ia- to Ia+. Similar changes in keratinocyte Ia-antigen expression occurred in the epidermis overlying untreated tuberculoid leprosy and cutaneous leishmaniasis lesions, but not in lepromatous leprosy. We suggest that one or more epidermal growth factors may be generated in the course of a delayed immune reaction in the dermis.
MeSH Terms
Antigens, Bacterial
Antigens, Differentiation, T-Lymphocyte
Antigens, Protozoan/analysis
Antigens, Surface/analysis
Epidermis/immunology,pathology
Histocompatibility Antigens Class II/analysis
Humans
Hypersensitivity, Delayed/immunology,pathology
Leishmaniasis/immunology,pathology
Leprosy/immunology,pathology
Monocytes/immunology
T-Lymphocytes/immunology
Chemicals
Antigens, Bacterial
Antigens, Differentiation, T-Lymphocyte
Antigens, Protozoan
Antigens, Surface
Histocompatibility Antigens Class II
Authors & Affiliations
9 authors, click to expand affiliations / ORCID
Kaplan G
Witmer M D
Nath I
Steinman R M
Laal S
Prasad H K
Sarno E N
Elvers U
Cohn Z A
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