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What is CINWntUp and CINnormL?

I read a paper that uses this two things as classes but Im not sure what they represent. I imply that CIN is referring to Chromosomal instability but I don't know what WntUp & normL refer to. (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4214593/)

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From the paper:

The dataset contains six colon cancer subtypes: class 1 = CINImmune-Down (116 samples), class 2 = dMMR (104 samples), class 3 = KRASm (75 samples), class 4 = CSC (59 samples), class 5 = CINWntUp (152 samples), and class 6 = CINnormL (60 samples).

CINWntUp and CINnormL are therefore two classes of colon cancer. You are correct, CIN is for chromosomal instability; WntUp refers to upregulation of Wnt, a signalling pathway involved in some cancers and named for a Wingless/Integrated phenotype in fruit flies and the homologous gene in vertebrates. normL stands for "normal-like."

See the original paper describing these classes:

Marisa, L., de Reyniès, A., Duval, A., Selves, J., Gaub, M. P., Vescovo, L., ... & Kirzin, S. (2013). Gene expression classification of colon cancer into molecular subtypes: characterization, validation, and prognostic value. PLoS medicine, 10(5), e1001453.

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