Langerhans' cells in paracoccidioidomycosis

Area of Science:

• Immunology
• Dermatology
• Infectious Diseases

Background:

• Langerhans' cells (LCs) are crucial immune cells in the skin.
• Alterations in LCs are observed in conditions with compromised cellular immunity.
• Paracoccidioidomycosis is a systemic fungal infection affecting cellular immunity.

Purpose of the Study:

• To investigate the density and morphology of Langerhans' cells in patients with disseminated paracoccidioidomycosis.
• To assess the potential correlation between LC alterations and the immune status in this disease.

Main Methods:

• Adenosine triphosphatase (ATPase) staining technique was employed.
• Epidermal sheets from skin biopsies were analyzed.
• LC density was quantified and compared between patients and healthy controls.

Main Results:

• A significant reduction in Langerhans' cell density was observed in paracoccidioidomycosis patients (323 +/- 135/mm2) compared to controls (689 +/- 204/mm2).
• Morphological changes in LCs were noted in patients with reduced cell numbers.
• The findings suggest a link between LC alterations and the host's immune response.

Conclusions:

• Disseminated paracoccidioidomycosis is associated with a marked decrease in skin Langerhans' cells.
• These LC alterations may serve as an indicator of the depressed cellular immunity characteristic of this infection.
• Further research is warranted to elucidate the precise role of LCs in paracoccidioidomycosis pathogenesis.