Inhibition of keratin 17 expression with antisense and RNAi strategies: exploring novel therapy for psoriasis.

Abstract:

:Psoriasis is now considered to be a chronic, immune-mediated and inflammatory skin disease. As the precise cause of psoriasis remains unknown, its treatment is challenging for dermatologists. Keratin 17 (K17), an intermediate filament protein, is highly expressed in psoriatic lesions, while not normally expressed in healthy epidermis. Studies have suggested that K17 plays a role in the pathogenesis of psoriasis. However, no study has been performed to determine the potential application of K17 down-regulation as a treatment option for psoriatic lesions. We hypothesized that anti-K17 interference may suppress the development and progression of psoriasis and potentially serve as a novel strategy for the treatment of psoriasis. Therefore, we down-regulated and silenced K17 gene expression in keratinocytes (KCs) using antisense and RNA interference (RNAi) techniques. We found that K17-specific antisense oligonucleotides (ASODN) or siRNAs inhibited proliferation and induced apoptosis in KCs as well as down-regulated K17 expression at both mRNA and protein levels. For our in vivo study, we constructed the SCID-hu xenogeneic transplantation psoriasis mouse model by grafting psoriatic lesions onto SCID mice and topically applied K17-specific ASODN and liposome-encapsulated siRNA to the grafts. We observed morphological and histological improvement in the treated psoriatic grafts. As a result, K17 mRNA and protein expression was significantly decreased in the grafts of the mouse model. Taken together, we conclude that anti-K17 therapy is an effective treatment option for psoriasis, and the K17 molecule, as a new target, may hold tremendous potential for the treatment of psoriasis in the future.

journal_name

Exp Dermatol

journal_title

Experimental dermatology

authors

Chang T,Sun L,Wang Y,Wang D,Li W,Li C,Gao T,Liu Y,Wang G

doi

10.1111/j.1600-0625.2010.01235.x

subject

Has Abstract

pub_date

2011-07-01 00:00:00

pages

555-60

issue

7

eissn

0906-6705

issn

1600-0625

journal_volume

20

pub_type

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