TY - JOUR
T1 - mRNA for tissue-type plasminogen activator is present in lesional epidermis from patients with psoriasis, pemphigus, or bullous pemphigoid, but is not detected in normal epidermis
AU - Baird, Janet
AU - Lazarus, Gerald S.
AU - Belin, Dominique
AU - Vassalli, Jean Dominique
AU - Busso, Nathalie
AU - Gubler, Pascale
AU - Jensen, Pamela J.
PY - 1990/11
Y1 - 1990/11
N2 - Plasminogen activator (PA), which catalyzes the conversion of plasminogen to the proteinase plasmin, has been implicated in a variety of cutaneous disorders. Lesional epidermis from patients with psoriasis, pemphigus, bullous pemphigoid, and Hailey-Hailey disease contains elevated levels of tissue-type PA (tPA) activity compared to non-lesional epidermis or to epidermis from normal individuals. In the present study, we have used Northern blot analysis to demonstrate that mRNA for tPA is detectable in lesions from patients with psoriasis, pemphigus, and bullous pemphigoid, but is not detectable in normal epidermis. These data strongly suggest that the tPA enzymatic activity present in lesional epidermis results from enhanced synthesis of the enzyme in situ, secondary to elevated steady-state levels of tPA mRNA. Cultured keratinocytes likewise are shown to contain tPA mRNA. Previous investigators have suggested that the phenotypes of keratinocytes in culture, psoriatic epidermis, and epidermis in the process of wound reepithelialization are comparable. Our findings, combined with those of other investigators, suggest that elevated tPA expression may be another common feature of epidermis under these circumstances.
AB - Plasminogen activator (PA), which catalyzes the conversion of plasminogen to the proteinase plasmin, has been implicated in a variety of cutaneous disorders. Lesional epidermis from patients with psoriasis, pemphigus, bullous pemphigoid, and Hailey-Hailey disease contains elevated levels of tissue-type PA (tPA) activity compared to non-lesional epidermis or to epidermis from normal individuals. In the present study, we have used Northern blot analysis to demonstrate that mRNA for tPA is detectable in lesions from patients with psoriasis, pemphigus, and bullous pemphigoid, but is not detectable in normal epidermis. These data strongly suggest that the tPA enzymatic activity present in lesional epidermis results from enhanced synthesis of the enzyme in situ, secondary to elevated steady-state levels of tPA mRNA. Cultured keratinocytes likewise are shown to contain tPA mRNA. Previous investigators have suggested that the phenotypes of keratinocytes in culture, psoriatic epidermis, and epidermis in the process of wound reepithelialization are comparable. Our findings, combined with those of other investigators, suggest that elevated tPA expression may be another common feature of epidermis under these circumstances.
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U2 - 10.1111/1523-1747.ep12504901
DO - 10.1111/1523-1747.ep12504901
M3 - Article
C2 - 2121833
AN - SCOPUS:0025254616
SN - 0022-202X
VL - 95
SP - 548
EP - 552
JO - Journal of Investigative Dermatology
JF - Journal of Investigative Dermatology
IS - 5
ER -