Abstract
We have used a monoclonal antibody against human pancreatic lipase to study the immunohistochemical expression of lipase in formalin-fixed, paraffin-embedded biopsy specimens from normal and a variety of tumoral and inflammatory skin discases. In normal skin, lipase is detected in the sebaceous glands and in the external root sheath of the hair follicle. Antibody to lipase might be a valuable reagent to help confirm sebaceous and follicular differentiation in adnexal tumors. Immunoreactivity to lipase is also detected within mononuclear phagocytes in situations where extracellular release of lipids occurs, such as in xanthomas or in inflammation of the fat with significant lysis of adipocytes. The antibody to lipase identifies a major protein in pilosebaceous homogenates of 42.7 kDa following immunoblotting.
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