miR-181a Promotes Multiple Protumorigenic Functions by Targeting TGFßR3.
J Invest Dermatol
; 142(7): 1956-1965.e2, 2022 07.
Article
em En
| MEDLINE
| ID: mdl-34890627
ABSTRACT
Cutaneous squamous cell carcinoma (cSCC) comprises 15â20% of all skin cancers and has a well-defined progression sequence from precancerous actinic keratosis to invasive cSCC. To identify targets for chemoprevention, we previously reported a cross-species analysis to identify the transcriptional drivers of cSCC development and identified miR-181a as a potential oncomiR. We show that the upregulation of miR-181a promotes multiple protumorigenic properties by targeting an understudied component of TGFß signaling, TGFßR3. miR-181a and TGFßR3 are upregulated and downregulated, respectively, in cSCC. miR-181a overexpression (OE) and TGFßR3 knockdown (KD) significantly suppresses UV-induced apoptosis in HaCaT cells and in primary normal human epidermal keratinocytes. In addition, OE of miR-181a or KD of TGFßR3 by short hairpin RNA enhances anchorage-independent survival. miR-181a OE or TGFßR3 KD enhances cellular migration and invasion and upregulation of epithelialâmesenchymal transition markers. Luciferase reporter assays demonstrate that miR-181a directly targets the 3'-untranslated region of TGFßR3. miR-181a upregulates phosphorylated SMAD3 levels after TGFß2 administration and results in elevated SNAIL and SLUG expression. Finally, we confirm in vivo that miR-181a inhibition compromises tumor growth. Importantly, these phenotypes can be reversed with TGFßR3 OE or KD in the context of miR-181a OE or KD, respectively, further highlighting the physiologic relevance of this regulation in cSCC.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Proteoglicanas
/
Neoplasias Cutâneas
/
Carcinoma de Células Escamosas
/
Receptores de Fatores de Crescimento Transformadores beta
/
MicroRNAs
Tipo de estudo:
Prognostic_studies
Limite:
Humans
Idioma:
En
Revista:
J Invest Dermatol
Ano de publicação:
2022
Tipo de documento:
Article
País de afiliação:
Estados Unidos