PTCH1 +/- dermal fibroblasts isolated from healthy skin of Gorlin syndrome patients exhibit features of carcinoma associated fibroblasts.
Gorlin's or nevoid basal cell carcinoma syndrome (NBCCS) causes predisposition to basal cell carcinoma (BCC), the commonest cancer in adult human. Mutations in the tumor suppressor gene PTCH1 are responsible for this autosomal dominant syndrome. In NBCCS patients, as in the general population, ultraviolet exposure is a major risk factor for BCC development. However these patients also develop BCCs in sun-protected areas of the skin, suggesting the existence of other mechanisms for BCC predisposition in NBCCS patients. As increasing evidence supports the idea that the stroma influences carcinoma development, we hypothesized that NBCCS fibroblasts could facilitate BCC occurence of the patients. WT (n = 3) and NBCCS fibroblasts bearing either nonsense (n = 3) or missense (n = 3) PTCH1 mutations were cultured in dermal equivalents made of a collagen matrix and their transcriptomes were compared by whole genome microarray analyses. Strikingly, NBCCS fibroblasts over-expressed mRNAs encoding pro-tumoral factors such as Matrix Metalloproteinases 1 and 3 and tenascin C. They also over-expressed mRNA of pro-proliferative diffusible factors such as fibroblast growth factor 7 and the stromal cell-derived factor 1 alpha, known for its expression in carcinoma associated fibroblasts. These data indicate that the PTCH1(+/-) genotype of healthy NBCCS fibroblasts results in phenotypic traits highly reminiscent of those of BCC associated fibroblasts, a clue to the yet mysterious proneness to non photo-exposed BCCs in NBCCS patients.
Valin
Alexandre
A
CNRS FRE2939, Université Paris Sud-Institut Gustave Roussy, Villejuif, France.
Barnay-Verdier
Stéphanie
S
Robert
Thomas
T
Ripoche
Hugues
H
Brellier
Florence
F
Chevallier-Lagente
Odile
O
Avril
Marie-Françoise
MF
Magnaldo
Thierry
T
D001478:Basal Cell Nevus Syndrome / Q000473:pathology*; D001485:Basement Membrane / Q000378:metabolism; D002280:Basal Cell Carcinoma / Q000473:pathology*; D016207:Cytokines / Q000378:metabolism; D005347:Fibroblasts / Q000201:enzymology / Q000473:pathology; D006801:Humans; D036341:Intercellular Signaling Peptides and Proteins / Q000378:metabolism; D020782:Matrix Metalloproteinases / Q000378:metabolism; D020411:Oligonucleotide Array Sequence Analysis; D000072079:Patched Receptors; D000072081:Patched-1 Receptor; D012333:RNA, Messenger / Q000235:genetics; D011956:Receptors, Cell Surface / Q000235:genetics*; D012867:Skin / Q000201:enzymology / Q000473:pathology*; D012878:Skin Neoplasms / Q000473:pathology*; D051153:Wnt Proteins / Q000378:metabolism; D051176:beta Catenin / Q000378:metabolism
D016207:Cytokines; C486399:GREM1 protein, human; D036341:Intercellular Signaling Peptides and Proteins; C000606236:PTCH1 protein, human; D000072079:Patched Receptors; D000072081:Patched-1 Receptor; D012333:RNA, Messenger; D011956:Receptors, Cell Surface; D051153:Wnt Proteins; D051176:beta Catenin; D020782:Matrix Metalloproteinases