Dotto laboratory

Laboratory of Skin Aging and Cancer Prevention

Department of Biochemistry, University of Lausanne, CH; Cutaneous Biology Research Center, Mass. Gen. Hosp., Boston, Mass.

Cancer risk is exponentially increasing with aging and aging-related diseases and cumulative exposure to environmental agents are connected with increased cancer risk. 

Photo by S. Matzinger

Aging has been connected with senescence of cells, which can function both as a fail safe mechanism against cancer development but also facilitate this process. The dual tumor-suppressing and -promoting function of cellular senescence depends on cell types and cell-cell interactions. 

Cancers do not arise solely from a single deregulated group of cells but rather as a combined result of alterations in tissues and organs associated with the aging and cellular senescence processes in widespreading cancer fields.

Within this context, our main research focuses on genetic and epigenetic determinants of field cancerisation, a very frequent condition consisting of multifocal and recurrent lesions at various stages of neoplastic progression connected with widespread aging-associated changes of surrounding tissues.

We focus on field cancerization of the skin, as a benchmark of major clinical significance. We are exploring genetic and epigenetic determinants of squamous cell carcinoma and melanoma development, with a specific focus on precursor lesions and their risk of malignant conversion.

In this context, we are exploring genetic and epigenetic determinants of cancer variability across gender and race. This is a topic of great interest as there are significant differences in cancer susceptibility between individuals of different sex and race that cannot solely be attributed to socioeconomic and behavioural factors and instead, are the likely result of an interplay with biological factors.

On the basis of the bad seed / bad soil hypothesis for the field cancerisation process that we have recently proposed, two main topics are being addressed : (i) intrinsic control mechanisms underlying self renewal of cancer initiating cells versus commitment to differentiation; (ii) role of underlying mesenchymal cells in control of premalignant and malignant squamous cell carcinoma and melanoma.

Cloccchiatti el al., JCI 2014

Field Cancerization : bad seed / bad soil hypothesis. Environmental insults, like UV irradiation or smoke, can target both epithelial and stromal compartments of organs such as skin, head/neck, lung, bladder or breast, with ensuing genetic and/or epigenetic changes. Establishment and spreading of “cancer fields” is the likely result of an interplay between epithelial and stromal alterations, with the latter playing an equally important and possibly primary role. The situation leading to multifocal and recurrent neoplastic lesions may be analogous to that of a bad plant difficult to eradicate.  This may be due to roots deeply embedded in the terrain or the spreading of bad multiple seeds, growing in the presence of a permissive or favorable soil. An alternative possibility with important conceptual implications is that the main problem is the soil itself. A bad soil could corrupt properties of otherwise perfectly good plants or seeds. According to this view, unless the soil is corrected, various forms of prevention and intervention would be of little or no use.

Principal Investigator : Gian-Paolo Dotto

Laboratory members

Berna Ozdemir

Sandro Goruppi

Min Ma

Soumitra Ghosh

Atul Katarkar

Luigi Mazzeo

Giulia Bottoni

Xiaoying Xu

Beatrice Tassone

Anastasia Samarkina

Tatiana Proust

Representative recent papers

Procopio, M.G., Laszlo, C., Al Labban, D., Eun Kim, D., Bordignon, P., Jo, S., Goruppi, S., Menietti, E., Ostano, P., Ala, U., Provero, P., Hoetzenecker, W., Neel, V., Kilarski, W., Swartz, M.A., Brisken, C., Lefort1, K. and Dotto, G.P. (2015) Combined CSL and p53 downregulation promotes cancer-associated fibroblast activation. Nature Cell Bio. 17, 1193–1204  doi:10.1038/ncb3228 

 Menietti, E., Xu, X., Ostano, P., Joseph, J.M., Lefort, K. and Dotto G.P. (2016) Negative control of CSL gene transcription by stress/DNA damage response and p53. Cell Cycle, 15, 1767-1778 doi: 10.1080/15384101.2016.1186317  PMC5216996

Kim, D.E, Procopio,M.G., Ghosh, S., Jo, S.H, Goruppi, S., Magliozzi, F., Bordignon, P., Neel, V., Angelino,P.and Dotto G.P. (2017) Convergent roles of ATF3 and CSL in chromatin control of cancer-associated fibroblast activation. J. Exp. Med. 214, 1-20, doi: 10.1084/jem.20170724

Goruppi, S., M.G. Procopio, S. Jo, A. Clocchiatti, V. Neel, and G.P. Dotto (2017). The ULK3 Kinase Is Critical for Convergent Control of Cancer-Associated Fibroblast Activation by CSL and GLI. Cell Rep 20:2468-2479,  doi: 10.1016/j.celrep.2017.08.048

Al Labban, D., Jo2, S.H., Ostano, P., Saglietti, C., Bongiovanni4, M., Panizzon, R., and Dotto, G.P. (2018). Notch-effector CSL promotes squamous cell carcinoma by repressing histone demethylase KDM6B. J. Clin. Invest. 128, 2581-2599,

Goruppi, S., Jo, S.H., Laszlo, C., Clocchiatti, A., Neel, V., and Dotto, G.P. (2018). Autophagy Controls CSL/RBPJkappa Stability through a p62/SQSTM1-Dependent Mechanism. Cell Rep 24, 3108-3114. PMID: 30231994

 Clocchiatti, A., S. Ghosh, M.G. Procopio, L. Mazzeo, P. Bordignon, P. Ostano, S. Goruppi, G. Bottoni, A. Katarkar, M. Levesque, P. Kölblinger, R. Dummer, V. Neel, B.C. Ozdemir, and G.P. Dotto. (2018). Androgen receptor functions as transcriptional repressor of Cancer Associated Fibroblast activation. J. Clin. Invest. 128(12): p. 5531-5548 doi: 10.1172/JCI99159.

Bottoni, G., Katarkar, A., Tassone, B., Ghosh, S., Clocchiatti, A., Goruppi, S., Bordignon, P., Jafari, P., Tordini, F., Lunardi, T., Hoetzenecker, W., Nell, V.,Lingner, J., and G.P. Dotto (2019). CSL controls telomere maintenance and genome stability in human dermal fibroblasts. Nature Comm. 29;10(1):3884. doi: 10.1038/s41467-019-11785-7.

Bordignon, P., Bottoni, G., Xu, X., Popescu, A., Truan, Z., Guenova, E., Kofler, L., Jafari, P., Ostano, P., Röcken, M., Neel, V., and G.P. Dotto (2019). Dualism of FGF and TGF-β Signaling in Heterogeneous Cancer-Associated Fibroblast Activation with ETV1 as a Critical Determinant. Cell Rep 28(9): 2358-2372.e6. doi: 10.1016/j.celrep.2019.07.092.

Recent reviews

Dotto, G.P, and Rustgi, A., Squamous cell cancers: a unified perspective on biology and genetics. Cancer Cell 2016; 29, 622-637

Clocchiatti, A., Cora, E.,, Zhang, Y. and Dotto, G.P. Sexual dimorphism in cancer. Nature Reviews Cancer 2016; 16: p. 330-9

Özdemir, B.C. and Dotto, G.P., Racial Differences in Cancer Susceptibility and Survival: More Than the Color of the Skin? Trends in Cancer, 2017; 3, 181-197

Özdemir, B.C., Csajka, C., Dotto, G.P., and Wagner, A.D. (2018). Sex Differences in Efficacy and Toxicity of Systemic Treatments: An Undervalued Issue in the Era of Precision Oncology. J Clin Oncol, 2018; 36, 2680-2683 JCO2018783290.

Goruppi, S., A. Clocchiatti, and Dotto, G.P. (2019). A role for stromal autophagy in cancer-associated fibroblast activation.Autophagy,15:4,738 739, DOI: 10.1080/15548627.2019.1569936

Özdemir, B.C. and Dotto, G.P. (2019) Sex hormones and anticancer immunity, Clinical Cancer Research, DOI:10.1158/1078-0432.CCR-19-0137

Dotto, G.P. (2019) Gender and sex—time to bridge the gap, EMBO Molecular Medicine,DOI: 10.15252/emmm.201910668