Journal
CELL REPORTS
Volume 40, Issue 12, Pages -Publisher
CELL PRESS
DOI: 10.1016/j.celrep.2022.111390
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Funding
- Department of Biotechnology of the Government of India [BT/PR8738/AGR/36/770/2013, BT/PR32539/BRB/10/1814/2019]
- National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS)
- NIH [5R01AR053185-03]
- American Cancer Society [15457-RSG-08164-01-DDC]
- Hellman Faculty Fellowship
- NCBS-TIFR planned funds
- Junior Research Fellowship from the DBT [DBT/JRF/13/AL/486]
- DBT-RA Fellowship
- National Mouse Research Resource (NaMoR) [BT/PR5981/MED/31/181/2012, 102/IFD/SAN/5003/2017-2018]
- DBT
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In this study, the transcription factor Snail is found to play a role in maintaining the stemness of epidermal keratinocytes in cutaneous squamous cell carcinoma (cSCC) models through the secretion of Mindin protein and activation of the Src-STAT3 pathway. Disruption of this signaling module attenuates tumorigenesis in human cSCC.
Preservation of a small population of cancer stem cells (CSCs) within a heterogeneous carcinoma serves as a paradigm to understand how select cells in a tissue maintain their undifferentiated status. In both emb-ryogenesis and cancer, Snail has been correlated with stemness, but the molecular underpinning of this phenomenon remains largely ill-defined. In models of cutaneous squamous cell carcinoma (cSCC), we discovered a non-epithelial-mesenchymal transition function for the transcription factor Snail in maintaining the stemness of epidermal keratinocytes. Snail-expressing cells secrete the matricellular protein Mindin, which functions in an autocrine fashion to activate a Src-STAT3 pathway to reinforce their stem/progenitor phenotype. This pathway is activated by the engagement of Mindin with the leukocyte-specific integrin, CD11b (ITGAM), which is also unexpectedly expressed by epidermal keratinocytes. Interestingly, disruption of this signaling module in human cSCC attenuates tumorigenesis, suggesting that targeting Mindin would be a promising therapeutic approach to hinder cancer recurrence.
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