The 72-kDa and the 92-kDa gelatinases, but not their inhibitors TIMP-1 and TIMP-2, are expressed in early psoriatic lesions

Claudio Feliciani, P. Vitullo, G. D'Orazi, R. Palmirotta, P. Amerio, S. Mohammad Pour, G. Coscione, P. L. Amerio, A. Modesti

Research output: Contribution to journalArticle

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Abstract

Psoriasis is histologically characterized by hyperkeratosis and papillomatosis with elongated vessels in the upper dermis. In order to evaluate the role of gelatinases in remodelling psoriatic skin in this study we examined the production of the 72-kDa (gelatinase A), 92-kDa collagenase (gelatinase B) and their tissue inhibitors TIMP-2 and TIMP-1. A total of 19 patients affected by different types of psoriasis were included in this study. An immunohistochemical study on cryosections was performed using antibodies to 72-kDa gelatinase, 92-kDa gelatinase, TIMP-1, TIMP-2, laminin, collagen types I, III, IV, VII. mRNA expression for gelatinases and their inhibitors were also analyzed by reverse transcriptase polymerase chain reaction (RT-PCR). In 14 of 19 patients there was a positivity in 92-kDa protein expression in keratinocytes. The 92-kDa gelatinase protein was also present in the upper dermis with prevalence around blood vessels. In 15 of 19 patients the 72-kDa was localized in the upper dermis, almost exclusively in the papillary dermis but absent in epidermis. TIMP-1 and TIMP-2 were both negative in all cases in immunoperoxidase and RT-PCR. Using RT-PCR we show that the 72-kDa mRNA is expressed exclusively in the dermis, on the contrary the 92-kDa was present in epidermis and dermis. Type I, III, IV and VII collagens did not show any alteration or disruption. Overexpression and production of gelatinases without inhibitory effects suggest a role of these proteins in remodelling the psoriatic skin probably inducing the typical histological pattern of papillomatosis.

Original languageEnglish
Pages (from-to)321-327
Number of pages7
JournalExperimental Dermatology
Volume6
Issue number6
Publication statusPublished - 1997

Fingerprint

Tissue Inhibitor of Metalloproteinase-2
Tissue Inhibitor of Metalloproteinase-1
Polymerase chain reaction
RNA-Directed DNA Polymerase
Matrix Metalloproteinase 2
Matrix Metalloproteinase 9
Dermis
Gelatinases
Skin
Reverse Transcriptase Polymerase Chain Reaction
Messenger RNA
Proteins
Collagen Type III
Matrix Metalloproteinase Inhibitors
Blood vessels
Papilloma
Laminin
Collagenases
Collagen Type I
Psoriasis

Keywords

  • Collagenases
  • Gelatinases
  • Metalloproteinases
  • Psoriasis

ASJC Scopus subject areas

  • Dermatology

Cite this

Feliciani, C., Vitullo, P., D'Orazi, G., Palmirotta, R., Amerio, P., Mohammad Pour, S., ... Modesti, A. (1997). The 72-kDa and the 92-kDa gelatinases, but not their inhibitors TIMP-1 and TIMP-2, are expressed in early psoriatic lesions. Experimental Dermatology, 6(6), 321-327.

The 72-kDa and the 92-kDa gelatinases, but not their inhibitors TIMP-1 and TIMP-2, are expressed in early psoriatic lesions. / Feliciani, Claudio; Vitullo, P.; D'Orazi, G.; Palmirotta, R.; Amerio, P.; Mohammad Pour, S.; Coscione, G.; Amerio, P. L.; Modesti, A.

In: Experimental Dermatology, Vol. 6, No. 6, 1997, p. 321-327.

Research output: Contribution to journalArticle

Feliciani, C, Vitullo, P, D'Orazi, G, Palmirotta, R, Amerio, P, Mohammad Pour, S, Coscione, G, Amerio, PL & Modesti, A 1997, 'The 72-kDa and the 92-kDa gelatinases, but not their inhibitors TIMP-1 and TIMP-2, are expressed in early psoriatic lesions', Experimental Dermatology, vol. 6, no. 6, pp. 321-327.
Feliciani, Claudio ; Vitullo, P. ; D'Orazi, G. ; Palmirotta, R. ; Amerio, P. ; Mohammad Pour, S. ; Coscione, G. ; Amerio, P. L. ; Modesti, A. / The 72-kDa and the 92-kDa gelatinases, but not their inhibitors TIMP-1 and TIMP-2, are expressed in early psoriatic lesions. In: Experimental Dermatology. 1997 ; Vol. 6, No. 6. pp. 321-327.
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AU - Feliciani, Claudio

AU - Vitullo, P.

AU - D'Orazi, G.

AU - Palmirotta, R.

AU - Amerio, P.

AU - Mohammad Pour, S.

AU - Coscione, G.

AU - Amerio, P. L.

AU - Modesti, A.

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