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CD1 positive epidermal Langerhans cells in indeterminate leprosy
R B Narayanan1, M Natarajan, K Katoch
1Central JALMA Institute for Leprosy, (Indian Council of Medical Research), Taj-Ganj, Agra, U.P.
Acta Leprologica
|January 1, 1988
Summary
In indeterminate leprosy, epidermal Langerhans cells (LC) numbers are unchanged. However, lesion infiltrates contain CD1+ cells and express HLA-DR antigens, suggesting immune cell involvement in early leprosy.
Area of Science:
- Immunodermatology
- Leprosy Research
- Cellular Immunology
Background:
- Leprosy is a chronic infectious disease primarily affecting the skin and peripheral nerves.
- Langerhans cells (LC) are critical immune cells in the skin's defense.
- Understanding early cellular changes in leprosy is crucial for diagnosis and treatment.
Purpose of the Study:
- To investigate the characteristics of Langerhans cells (LC) in skin lesions of untreated indeterminate leprosy patients.
- To analyze the cellular composition and immune marker expression within these early leprosy lesions.
Main Methods:
- Indirect immunofluorescence staining was employed using monoclonal antibodies.
- Epidermal Langerhans cells (LC) were quantified and their distribution analyzed.
- Infiltrate cells were examined for CD1 and HLA-DR antigen expression.
Main Results:
- No significant difference in the number or distribution of epidermal Langerhans cells (LC) was found between indeterminate leprosy lesions and control skin.
- The cellular infiltrates within the leprosy lesions contained CD1+ cells.
- A majority of cells in the infiltrates expressed HLA-DR antigens.
Conclusions:
- Early indeterminate leprosy lesions do not show alterations in epidermal Langerhans cell (LC) populations.
- The presence of CD1+ cells and HLA-DR expression in lesion infiltrates indicates immune cell infiltration and activation in early leprosy.
- These findings highlight the role of specific immune cell subsets in the pathogenesis of indeterminate leprosy.