miR-9 Does Not Regulate Lamin A Expression in Metastatic Cells from Lung Adenocarcinoma

Julien Guinde , Audrey Benoit (1) , Diane Frankel (1) , Stéphane Robert , Kevin Ostacolo , Nicolas Levy (1, 2) , Philippe Astoul , Patrice Roll (1, 3) , Elise Kaspi (1, 3)

1 MMG - Marseille medical genetics - Centre de génétique médicale de Marseille
2 Département de génétique médicale [Hôpital de la Timone - APHM]
3 Laboratoire de Biologie Cellulaire [Hôpital de la Timone - APHM]

In lung adenocarcinoma, low lamin A expression in pleural metastatic cells has been proposed as a pejorative factor. miR-9 physiologically inhibits the expression of lamin A in neural cells and seems to be a central actor in the carcinogenesis and the metastatic process in lung cancer. Thus, it could be a good candidate to explain the reduction of lamin A expression in lung adenocarcinoma cells. miR-9 expression was analyzed in 16 pleural effusions containing metastatic cells from lung adenocarcinoma and was significantly reduced in patients from the ‘Low lamin A expression’ group compared to patients from the ‘High lamin A expression’ group. Then, carcinoma cells selection by fluorescence-activated cell sorting (FACS) was performed according to epithelial membrane antigen (EMA) expression, reflecting lamin A expression. miR-9 was underexpressed in lamin A− carcinoma cells compared to lamin A+ carcinoma cells in patients from the ‘Low lamin A expression’ group, whereas there was no difference of miR-9 expression between lamin A+ and lamin A− carcinoma cells in patients from the ‘High lamin A expression’ group. These results suggest that miR-9 does not regulate lamin A expression in metastatic cells from lung adenocarcinoma. On the contrary, miR-9 expression was shown to be reduced in lamin A-negative carcinoma cells.

Mots clés: lamin A; microRNA-9; lung adenocarcinoma; pleural effusions

Domaines: Sciences du Vivant [q-bio]; Cancer; Génétique humaine; Médecine humaine et pathologie

Julien Guinde, Audrey Benoit, Diane Frankel, Stéphane Robert, Kevin Ostacolo, et al.. miR-9 Does Not Regulate Lamin A Expression in Metastatic Cells from Lung Adenocarcinoma. International Journal of Molecular Sciences, 2020, 21 (5), pp.1599. ⟨10.3390/ijms21051599⟩. ⟨hal-03222605⟩