Oncogenic ALK F1174L drives tumorigenesis in cutaneous squamous cell carcinoma

Life Sci Alliance. 2020 Apr 20;3(6):e201900601. doi: 10.26508/lsa.201900601. Print 2020 Jun.

Abstract

Cutaneous squamous cell carcinoma (cSCC) is the second most common skin cancer characterized by increased mortality. Here, we show for the first time that anaplastic lymphoma kinase (ALK), a receptor tyrosine kinase of the insulin receptor superfamily, plays a pivotal role in the pathogenesis of cSCC. Our data demonstrate that the overexpression of the constitutively active, mutated ALK, ALK F1174L , is sufficient to initiate the development of cSCC and is 100% penetrant. Moreover, we show that cSCC development upon ALK F1174L overexpression is independent of the cell-of-origin. Molecularly, our data demonstrate that ALK F1174L cooperates with oncogenic Kras G12D and loss of p53, well-established events in the biology of cSCC. This cooperation results in a more aggressive cSCC type associated with a higher grade histological morphology. Finally, we demonstrate that Stat3 is a key downstream effector of ALK F1174L and likely plays a role in ALK F1174L -driven cSCC tumorigenesis. In sum, these findings reveal that ALK can exert its tumorigenic potential via cooperation with multiple pathways crucial in the pathogenesis of cSCC. Finally, we show that human cSCCs contain mutations in the ALK gene. Taken together, our data identify ALK as a new key player in the pathogenesis of cSCC, and this knowledge suggests that oncogenic ALK signaling can be a target for future clinical trials.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Anaplastic Lymphoma Kinase / genetics
  • Anaplastic Lymphoma Kinase / metabolism*
  • Animals
  • Carcinogenesis / genetics
  • Carcinogenesis / metabolism*
  • Carcinoma, Squamous Cell / genetics
  • Carcinoma, Squamous Cell / metabolism*
  • Disease Models, Animal
  • HEK293 Cells
  • Humans
  • Mice
  • Mice, Inbred C57BL
  • Mice, Transgenic
  • Mutation
  • Oncogenes*
  • Signal Transduction / genetics*
  • Skin Neoplasms / genetics
  • Skin Neoplasms / metabolism*
  • Transfection

Substances

  • ALK protein, human
  • Alk protein, mouse
  • Anaplastic Lymphoma Kinase