Pep-1 as a novel probe for the in situ detection of hyaluronan

JM Zmolik, ME Mummert - Journal of Histochemistry & …, 2005 - journals.sagepub.com
JM Zmolik, ME Mummert
Journal of Histochemistry & Cytochemistry, 2005journals.sagepub.com
Hyaluronan (HA) is expressed by most tissues, including skin. Localization of HA in the skin
is assessed by histology with HA-binding protein (HABP) serving as the probe. Reports have
suggested that HA expression in skin is altered in a number of diseases. However,
interlaboratory variations in HABP staining profiles, even in normal skin, suggest a need to
standardize methods and/or identify new probes. We report the staining patterns of a HA-
binding peptide (termed “Pep-1”) in human and mouse skin. After acetone fixation, Pep-1 …
Hyaluronan (HA) is expressed by most tissues, including skin. Localization of HA in the skin is assessed by histology with HA-binding protein (HABP) serving as the probe. Reports have suggested that HA expression in skin is altered in a number of diseases. However, interlaboratory variations in HABP staining profiles, even in normal skin, suggest a need to standardize methods and/or identify new probes. We report the staining patterns of a HA-binding peptide (termed “Pep-1”) in human and mouse skin. After acetone fixation, Pep-1 stained HA in the intercellular spaces of the epidermis, whereas staining in the dermis was weak and diffuse in both human and mouse skin. HABP staining of the epidermis and dermis were comparable in human skin but failed to stain the vital epidermis of mouse skin. In human skin, Pep-1 stained the basal, spinous, and granular layers, whereas HABP failed to stain the basal layer. Precipitation of HA in situ resulted in dermal staining but weak staining in the epidermis for HABP and Pep-1. Our results may suggest that Pep-1 is sensitive to HA conformation. Furthermore, Pep-1 may represent a new probe to study HA expression in the skin.
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