UCAGenomiX related publications

Du to our strong expertise in "omics" experiments and in microRNAs topics we decided to separate into 3 categories the related publications into which the Functional genomics Platform of Nice-Sophia-Antipolis is involved :
  1. Expression studies (DNA microarrays and high-throughput sequencing experiments)
  2. MicroRNA studies
  3. Miscellaneous

Pons Nicolas

 660 route des lucioles, 06560 Valbonne Sophia-Antipolis

4 publications found

1. CDC20B is required for deuterosome-mediated centriole production in multiciliated cells
Nat Commun. 2018 Nov 7;9(1):4668. doi: 10.1038/s41467-018-06768-z.
Revinski DR, Zaragosi LE, Boutin C, Ruiz-Garcia S, Deprez M, Thomé V, Rosnet O, Gay AS, Mercey O, Paquet A, Pons N, Ponzio G, Marcet B, Kodjabachian L, Barbry P
Aix Marseille Univ, CNRS, IBDM, Marseille, France. Université Côte d'Azur, CNRS, IPMC, Sophia-Antipolis, France. Université Côte d'Azur, CNRS, IPMC, Sophia-Antipolis, France. marcet@ipmc.cnrs.fr. Aix Marseille Univ, CNRS, IBDM, Marseille, France. laurent.kodjabachian@univ-amu.fr. Université Côte d'Azur, CNRS, IPMC, Sophia-Antipolis, France. barbry@ipmc.cnrs.fr.

Multiciliated cells (MCCs) harbor dozens to hundreds of motile cilia, which generate hydrodynamic forces important in animal physiology. In vertebrates, MCC differentiation involves massive centriole production by poorly characterized structures called deuterosomes. Here, single-cell RNA sequencing reveals that human deuterosome stage MCCs are characterized by the expression of many cell cycle-related genes. We further investigated the uncharacterized vertebrate-specific cell division cycle 20B (CDC20B) gene, which hosts microRNA-449abc. We show that CDC20B protein associates to deuterosomes and is required for centriole release and subsequent cilia production in mouse and Xenopus MCCs. CDC20B interacts with PLK1, a kinase known to coordinate centriole disengagement with the protease Separase in mitotic cells. Strikingly, over-expression of Separase rescues centriole disengagement and cilia production in CDC20B-deficient MCCs. This work reveals the shaping of deuterosome-mediated centriole production in vertebrate MCCs, by adaptation of canonical and recently evolved cell cycle-related molecules.
Pubmed link : 30405130

2. The "one airway, one disease" concept in light of Th2 inflammation.
Eur Respir J. 2018 Sep 6. pii: 1800437. doi: 10.1183/13993003.00437-2018.
Giovannini-Chami L, Paquet A, Sanfiorenzo C, Pons N, Cazareth J, Magnone V, Lebrigand K, Chevalier B, Vallauri A, Julia V, Marquette CH, Marcet B, Leroy S, Barbry P
Université Côte d'Azur, Hôpitaux pédiatriques de Nice CHU-Lenval, Pediatric Pulmonology and Allergology Department, Nice, France. Université Côte d'Azur, CNRS, Institut de Pharmacologie Moléculaire et Cellulaire, Sophia Antipolis, France. Université Côte d'Azur, CHU de Nice, FHU Oncoage, Pulmonology Department, Nice, France.

In line with the pathophysiological continuum described between nose and bronchus in allergic respiratory diseases, we assessed whether nasal epithelium could mirror the Th2 status of bronchial epithelium.Nasal and bronchial cells were collected by brushings from patients with allergic rhinitis and asthma (AR, n=12), isolated allergic rhinitis (R, n=14) and healthy controls (C, n=13). Cellular composition was assessed by flow cytometry. Gene expression was analysed by RNA sequencing. Th2, Th17 and interferon signatures were derived from the literature.Infiltration by polymorphonuclear neutrophils in nose excluded 30% of the initial cohort. All bronchial samples from AR group were Th2-high. Nasal samples gene expression profile from the AR group correctly predicted the paired bronchial sample Th2 status in 71% of cases. Nevertheless, nasal cells did not appear as a reliable surrogate of the Th2 response, in particular due to a more robust influence of the interferon response in 14/26 nasal samples. Th2 scores correlated with mast cells counts (p<0.001) and numbers of sensitizations (p=0.006 and 0.002), while Th17 scores correlated with PMN counts (p<0.014).The large variability in nasal cell composition and type of inflammation restricts its use as a surrogate for assessing bronchial Th2 inflammation in AR patients.
Pubmed link : 30190271

3. Effects of proton versus photon irradiation on (lymph)angiogenic, inflammatory, proliferative and anti-tumor immune responses in head and neck squamous cell carcinoma.
Oncogenesis. 2017 Jul 3;6(7):e354. doi: 10.1038/oncsis.2017.56
Lupu-Plesu M, Claren A, Martial S, N'Diaye PD, Lebrigand K, Pons N, Ambrosetti D, Peyrottes I, Feuillade J, Hérault J, Dufies M, Doyen J, Pagès G
University of Nice Sophia Antipolis, Nice, France. Institute for Research on Cancer and Aging, Nice, CNRS UMR 7284, INSERM U1081, Nice, France. University of Aix Marseille, Marseille, France. Centre Antoine Lacassagne, Nice, France. University of the Côte d'Azur, CNRS, Institute of Molecular and Cellular Pharmacology, Sophia Antipolis, France. Nice University Hospital, Nice, France.

The proximity of organs at risk makes the treatment of head and neck squamous cell carcinoma (HNSCC) challenging by standard radiotherapy. The higher precision in tumor targeting of proton (P) therapy could promote it as the treatment of choice for HNSCC. Besides the physical advantage in dose deposition, few is known about the biological impact of P versus photons (X) in this setting. To investigate the comparative biological effects of P versus X radiation in HNSCC cells, we assessed the relative biological effectiveness (RBE), viability, proliferation and mRNA levels for genes involved in (lymph)angiogenesis, inflammation, proliferation and anti-tumor immunity. These parameters, particularly VEGF-C protein levels and regulations, were documented in freshly irradiated and/or long-term surviving cells receiving low/high-dose, single (SI)/multiple (MI) irradiations with P/X. The RBE was found to be 1.1 Key (lymph)angiogenesis and inflammation genes were downregulated (except for vegf-c) after P and upregulated after X irradiation in MI surviving cells, demonstrating a more favorable profile after P irradiation. Both irradiation types stimulated vegf-c promoter activity in a NF-κB-dependent transcriptional regulation manner, but at a lesser extent after P, as compared to X irradiation, which correlated with mRNA and protein levels. The cells surviving to MI by P or X generated tumors with higher volume, anarchic architecture and increased density of blood vessels. Increased lymphangiogenesis and a transcriptomic analysis in favor of a more aggressive phenotype were observed in tumors generated with X-irradiated cells. Increased detection of lymphatic vessels in relapsed tumors from patients receiving X radiotherapy was consistent with these findings. This study provides new data about the biological advantage of P, as compared to X irradiation. In addition to its physical advantage in dose deposition, P irradiation may help to improve treatment approaches for HNSCC.
Pubmed link : 28671677

4. Characterizing isomiR variants within the microRNA-34/449 family
FEBS Lett. 2017 Mar;591(5):693-705. doi: 10.1002/1873-3468.12595. Epub 2017 Feb 28
Mercey O, Popa A, Cavard A, Paquet A, Chevalier B, Pons N, Magnone V, Zangari J, Brest P, Zaragosi LE, Ponzio G, Lebrigand K, Barbry P, Marcet B
CNRS, IPMC, Université Côte d'Azur, Sophia-Antipolis, Valbonne, France. CNRS, INSERM, IRCAN, FHU-OncoAge, Université Côte d'Azur, Sophia-Antipolis, Valbonne, France.

miR-34/449 microRNAs are conserved regulators of multiciliated cell differentiation. Here, we evidence and characterize expression of two isomiR variant sequences from the miR-34/449 family in human airway epithelial cells. These isomiRs differ from their canonical counterparts miR-34b and miR-449c by one supplemental uridine at their 5'-end, leading to a one-base shift in their seed region. Overexpression of canonical miR-34/449 or 5'-isomiR-34/449 induces distinct gene expression profiles and biological effects. However, some target transcripts and functional activities are shared by both canonical microRNAs and isomiRs. Indeed, both repress important targets that result in cell cycle blockage and Notch pathway inhibition. Our findings suggest that 5'-isomiR-34/449 may represent additional mechanisms by which miR-34/449 family finely controls several pathways to drive multiciliogenesis.
Pubmed link : 28192603