Stress et cancer

Publications de l’équipe

Année de publication : 2019

G Gentric, Y Kieffer, V Mieulet, O Goundiam, C Bonneau, F Nemati, I Hurbain, G Raposo, T Popova, MH Stern, V Lallemand-Breitenbach, S Müller, T Cañeque, R Rodriguez, A Vincent-Salomon, H de Thé, R Rossignol, F Mechta-Grigoriou (2019 Jan 5)

PML-Regulated Mitochondrial Metabolism Enhances Chemosensitivity in Human Ovarian Cancers

Cell Metabolism En savoir plus
Résumé

High-grade serous ovarian cancer (HGSOC) remains an unmet medical challenge. Here, we unravel an unanticipated metabolic heterogeneity in HGSOC. By combining proteomic, metabolomic, and bioergenetic analyses, we identify two molecular subgroups, low- and high-OXPHOS. While low-OXPHOS exhibit a glycolytic metabolism, high-OXPHOS HGSOCs rely on oxidative phosphorylation, supported by glutamine and fatty acid oxidation, and show chronic oxidative stress. We identify an important role for the PML-PGC-1α axis in the metabolic features of high-OXPHOS HGSOC. In high-OXPHOS tumors, chronic oxidative stress promotes aggregation of PML-nuclear bodies, resulting in activation of the transcriptional co-activator PGC-1α. Active PGC-1α increases synthesis of electron transport chain complexes, thereby promoting mitochondrial respiration. Importantly, high-OXPHOS HGSOCs exhibit increased response to conventional chemotherapies, in which increased oxidative stress, PML, and potentially ferroptosis play key functions. Collectively, our data establish a stress-mediated PML-PGC-1α-dependent mechanism that promotes OXPHOS metabolism and chemosensitivity in ovarian cancer.

Replier

Année de publication : 2018

Givel AM, Kieffer Y, Scholer-Dahirel A, Sirven P, Cardon M, Pelon F, Magagna I, Gentric G, Costa A, Bonneau C, Mieulet V, Vincent-Salomon A, Mechta-Grigoriou F (2018 Mar 13)

miR200-regulated CXCL12β promotes fibroblast heterogeneity and immunosuppression in ovarian cancers.

Nature communications : DOI : 10.1038/s41467-018-03348-z. En savoir plus
Résumé

High-grade serous ovarian cancers (HGSOC) have been subdivided into molecular subtypes. The mesenchymal HGSOC subgroup, defined by stromal-related gene signatures, is invariably associated with poor patient survival. We demonstrate that stroma exerts a key function in mesenchymal HGSOC. We highlight stromal heterogeneity in HGSOC by identifying four subsets of carcinoma-associated fibroblasts (CAF-S1-4). Mesenchymal HGSOC show high content in CAF-S1 fibroblasts, which exhibit immunosuppressive functions by increasing attraction, survival, and differentiation of CD25+FOXP3+T lymphocytes. The beta isoform of the CXCL12 chemokine (CXCL12β) specifically accumulates in the immunosuppressive CAF-S1 subset through a miR-141/200a dependent-mechanism. Moreover, CXCL12β expression in CAF-S1 cells plays a crucial role in CAF-S1 immunosuppressive activity and is a reliable prognosis factor in HGSOC, in contrast to CXCL12α. Thus, our data highlight the differential regulation of the CXCL12α and CXCL12β isoforms in HGSOC, and reveal a CXCL12β-associated stromal heterogeneity and immunosuppressive environment in mesenchymal HGSOC.

Replier
Costa A, Kieffer Y, Scholer-Dahirel A, Pelon F, Bourachot B, Cardon M, Sirven P, Magagna I, Fuhrmann L, Bernard C, Bonneau C, Kondratova M, Kuperstein I, Zinovyev A, Givel AM, Parrini MC, Soumelis V, Vincent-Salomon A, Mechta-Grigoriou F (2018 Mar 12)

Fibroblast Heterogeneity and Immunosuppressive Environment in Human Breast Cancer.

Cancer Cell : 463-479 : DOI : 10.1016/j.ccell.2018.01.011 En savoir plus
Résumé

Carcinoma-associated fibroblasts (CAF) are key players in the tumor microenvironment. Here, we characterize four CAF subsets in breast cancer with distinct properties and levels of activation. Two myofibroblastic subsets (CAF-S1, CAF-S4) accumulate differentially in triple-negative breast cancers (TNBC). CAF-S1 fibroblasts promote an immunosuppressive environment through a multi-step mechanism. By secreting CXCL12, CAF-S1 attracts CD4+CD25+T lymphocytes and retains them by OX40L, PD-L2, and JAM2. Moreover, CAF-S1 increases T lymphocyte survival and promotes their differentiation into CD25HighFOXP3High, through B7H3, CD73, and DPP4. Finally, in contrast to CAF-S4, CAF-S1 enhances the regulatory T cell capacity to inhibit T effector proliferation. These data are consistent with FOXP3+ T lymphocyte accumulation in CAF-S1-enriched TNBC and show how a CAF subset contributes to immunosuppression.

Replier

Année de publication : 2017

Lucie Hebert, Dorine Bellanger, Chloé Guillas, Antoine Campagne, Florent Dingli, Damarys Loew, Alice Fievet, Virginie Jacquemin, Tatiana Popova, Didier Jean, Fatima Mechta-Grigoriou, Raphaël Margueron, Marc-Henri Stern (2017 Oct 27)

Modulating BAP1 expression affects ROS homeostasis, cell motility and mitochondrial function.

Oncotarget : 72513-72527 : DOI : 10.18632/oncotarget.19872 En savoir plus
Résumé

The tumor suppressor BAP1 associates with ASXL1/2 to form the core Polycomb complex PR-DUB, which catalyzes the removal of mono-ubiquitin from several substrates including histone H2A. This complex also mediates the poly-deubiquitination of HCFC1, OGT and PCG1-α, preventing them from proteasomal degradation. Surprisingly, considering its role in a Polycomb complex, no transcriptional signature was consistently found among BAP1-inactivated tumor types. It was hypothesized that BAP1 tumor suppressor activity could reside, at least in part, in stabilizing proteins through its poly-deubiquitinase activity. Quantitative mass spectrometry and gene expression arrays were used to investigate the consequences of BAP1 expression modulation in the NCI-H226 mesothelioma cell line. Analysis of differentially expressed proteins revealed enrichment in cytoskeleton organization, mitochondrial activity and ROS management, while gene expression analysis revealed enrichment in the epithelial-to-mesenchymal transition pathway. Functional assessments in BAP1 inactivated, BAP1 wild-type and BAP1 catalytically dead-expressing NCI-H226 and QR mesothelioma cell lines confirmed alteration of these pathways and demonstrated that BAP1 deubiquitinase activity was mandatory to maintain these phenotypes. Interestingly, monitoring intracellular ROS levels partly restored the morphology and the mitochondrial activity. Finally, the study suggests new tumorigenic and cellular functions of BAP1 and shows for the first time the interest of studying the proteome as readout of BAP1 inactivation.

Replier
Gentric G, Mieulet V, Mechta-Grigoriou F (2017 Mar 20)

Heterogeneity in Cancer Metabolism: New Concepts in an Old Field.

Antioxidants & Redox Signaling : 26 : DOI : 10.1089/ars.2016.6750 En savoir plus
Résumé

SIGNIFICANCE:

In the last years, metabolic reprogramming, fluctuations in bioenergetic fuels, and modulation of oxidative stress became newkey hallmarks of tumor development. In cancer, elevated glucose uptake and high glycolytic rate, as a source of adenosine triphosphate, constitute a growth advantage for tumors. This represents the universally known Warburg effect, which gave rise to one major clinical application for detecting cancercells using glucose analogs: the positron emission tomography scan imaging. Recent Advances: Glucose utilization and carbon sources in tumors are much more heterogeneous than initially thought. Indeed, newstudies emerged and revealed a dual capacity of tumor cells for glycolytic and oxidative phosphorylation (OXPHOS) metabolism. OXPHOS metabolism, which relies predominantly on mitochondrial respiration, exhibits fine-tuned regulation of respiratory chain complexes and enhanced antioxidant response or detoxification capacity.

CRITICAL ISSUES:

OXPHOS-dependent cancercells use alternative oxidizable substrates, such as glutamine and fatty acids. The diversity of carbon substrates fueling neoplastic cells is indicative of metabolic heterogeneity, even within tumors sharing the same clinical diagnosis. Metabolic switch supports cancercell stemness and their bioenergy-consuming functions, such as proliferation, survival, migration, and invasion. Moreover, reactive oxygen species-induced mitochondrial metabolismand nutrient availability are important for interaction with tumor microenvironment components. Carcinoma-associated fibroblasts and immune cells participate in the metabolic interplay with neoplastic cells. They collectively adapt in a dynamic manner to the metabolic needs of cancercells, thus participating in tumorigenesis and resistance to treatments.

Replier
Lefort, A Thuleau, Y Kieffer, P Sirven, I Bieche, E Marangoni, A Vincent-Salomon & F Mechta-Grigoriou (2017 Mar 2)

CXCR4 inhibitors could benefit to HER2 but not to triple-negative breast cancer patients

Oncogene : 1211–1222 : DOI : 10.1038 En savoir plus
Résumé

The CXCR4 receptor and its ligand CXCL12 (also named stromal cell-derived factor 1, SDF1) have a critical role in chemotaxis and homing, key steps in cancer metastasis. Although myofibroblasts expressing CXCL12 are associated with the presence of axillary metastases in HER2 breast cancers (BC), the therapeutic interest of targeting CXCR4/CXCL12 axis in the different BC subtypes remains unclear. Here, we investigate this question by testing antitumor activity of CXCR4 inhibitors in patient-derived xenografts (PDX), which faithfully reproduce human tumor properties. We observed that two CXCR4 inhibitors, AMD3100 and TN14003, efficiently impair tumor growth and metastasis dissemination in both Herceptin-sensitive and Herceptin-resistant HER2 BC. Conversely, blocking CXCR4/CXCL12 pathway in triple-negative (TN) BC does not reduce tumor growth, and can even increase metastatic spread. Moreover, although CXCR4 inhibitors significantly reduce myofibroblast content in all BC subtypes, they decrease angiogenesis only in HER2 BC. Thus, our findings suggest that targeting CXCR4 could provide some therapeutic interest for HER2 BC patients, whereas it has no impact or could even be detrimental for TN BC patients.

Replier

Année de publication : 2016

S Lefort, A Thuleau, Y Kieffer, P Sirven, I Bieche, E Marangoni, A Vincent-Salomon, F Mechta-Grigoriou (2016 Sep 27)

CXCR4 inhibitors could benefit to HER2 but not to triple-negative breast cancer patients.

Oncogene : DOI : 10.1038/onc.2016.284 En savoir plus
Résumé

The CXCR4 receptor and its ligand CXCL12 (also named stromal cell-derived factor 1, SDF1) have a critical role in chemotaxis and homing, key steps in cancer metastasis. Although myofibroblasts expressing CXCL12 are associated with the presence of axillary metastases in HER2 breast cancers (BC), the therapeutic interest of targeting CXCR4/CXCL12 axis in the different BC subtypes remains unclear. Here, we investigate this question by testing antitumor activity of CXCR4 inhibitors in patient-derived xenografts (PDX), which faithfully reproduce human tumor properties. We observed that two CXCR4 inhibitors, AMD3100 and TN14003, efficiently impair tumor growth and metastasis dissemination in both Herceptin-sensitive and Herceptin-resistant HER2 BC. Conversely, blocking CXCR4/CXCL12 pathway in triple-negative (TN) BC does not reduce tumor growth, and can even increase metastatic spread. Moreover, although CXCR4 inhibitors significantly reduce myofibroblast content in all BC subtypes, they decrease angiogenesis only in HER2 BC. Thus, our findings suggest that targeting CXCR4 could provide some therapeutic interest for HER2 BC patients, whereas it has no impact or could even be detrimental for TN BC patients.Oncogene advance online publication, 26 September 2016; doi:10.1038/onc.2016.284.

Replier
Geraldine Gentric, Virginie Mieulet, Fatima Mechta-Grigoriou (2016 May 28)

Heterogeneity in Cancer Metabolism: New Concepts in an old Field.

Antioxidants & redox signaling En savoir plus
Résumé

In the last years, metabolic reprogramming, fluctuations in bioenergetic fuels and modulation of oxidative stress became new key hallmarks of tumor development. In cancer, elevated glucose uptake and high glycolytic rate, as source of ATP, constitute a growth advantage for tumors. This represents the universally known « Warburg effect », which gave rise to one major clinical application for detecting cancer cells using glucose analogues: the PET-scan imaging.

Replier
Tina Gruosso, Virginie Mieulet, Melissa Cardon, Brigitte Bourachot, Yann Kieffer, Flavien Devun, Thierry Dubois, Marie Dutreix, Anne Vincent-Salomon, Kyle Malcolm Miller, Fatima Mechta-Grigoriou (2016 Mar 24)

Chronic oxidative stress promotes H2AX protein degradation and enhances chemosensitivity in breast cancer patients.

EMBO molecular medicine : 527-49 : DOI : 10.15252/emmm.201505891 En savoir plus
Résumé

Anti-cancer drugs often increase reactive oxygen species (ROS) and cause DNA damage. Here, we highlight a new cross talk between chronic oxidative stress and the histone variant H2AX, a key player in DNA repair. We observe that persistent accumulation of ROS, due to a deficient JunD-/Nrf2-antioxidant response, reduces H2AX protein levels. This effect is mediated by an enhanced interaction of H2AX with the E3 ubiquitin ligase RNF168, which is associated with H2AX poly-ubiquitination and promotes its degradation by the proteasome. ROS-mediated H2AX decrease plays a crucial role in chemosensitivity. Indeed, cycles of chemotherapy that sustainably increase ROS reduce H2AX protein levels in Triple-Negative breast cancer (TNBC) patients. H2AX decrease by such treatment is associated with an impaired NRF2-antioxidant response and is indicative of the therapeutic efficiency and survival of TNBC patients. Thus, our data describe a novel ROS-mediated regulation of H2AX turnover, which provides new insights into genetic instability and treatment efficacy in TNBC patients.

Replier
Christophe Couderc, Alizée Boin, Laetitia Fuhrmann, Anne Vincent-Salomon, Vinay Mandati, Yann Kieffer, Fatima Mechta-Grigoriou, Laurence Del Maestro, Philippe Chavrier, David Vallerand, Isabelle Brito, Thierry Dubois, Leanne De Koning, Daniel Bouvard, Daniel Louvard, Alexis Gautreau, Dominique Lallemand (2016 Jan 26)

AMOTL1 integrates Hippo signaling to promote breast cancer progression by inducing tumor cell proliferation and migration

Neoplasia (New York, N.Y.) : 10-24 : DOI : 10.1016/j.neo.2015.11.010 En savoir plus
Résumé

The Hippo signaling network is a key regulator of cell fate. In the recent years, it was shown that its implication in cancer goes well beyond the sole role of YAP transcriptional activity and its regulation by the canonical MST/LATS kinase cascade. Here we show that the motin family member AMOTL1 is an important effector of Hippo signaling in breast cancer. AMOTL1 connects Hippo signaling to tumor cell aggressiveness. We show that both canonical and noncanonical Hippo signaling modulates AMOTL1 levels. The tumor suppressor Merlin triggers AMOTL1 proteasomal degradation mediated by the NEDD family of ubiquitin ligases through direct interaction. In parallel, YAP stimulates AMOTL1 expression. The loss of Merlin expression and the induction of Yap activity that are frequently observed in breast cancers thus result in elevated AMOTL1 levels. AMOTL1 expression is sufficient to trigger tumor cell migration and stimulates proliferation by activating c-Src. In a large cohort of human breast tumors, we show that AMOTL1 protein levels are upregulated during cancer progression and that, importantly, the expression of AMOTL1 in lymph node metastasis appears predictive of the risk of relapse. Hence we uncover an important mechanism by which Hippo signaling promotes breast cancer progression by modulating the expression of AMOTL1.

Replier
Daniel J Klionsky, Kotb Abdelmohsen, Akihisa Abe, Md Joynal Abedin, Hagai Abeliovich, Abraham Acevedo Arozena, Hiroaki Adachi, Christopher M Adams, Peter D Adams, Khosrow Adeli, Peter J Adhihetty, Sharon G Adler, Galila Agam, Rajesh Agarwal, Manish K Aghi, Maria Agnello, Patrizia Agostinis, Patricia V Aguilar, Julio Aguirre-Ghiso, Edoardo M Airoldi, Slimane Ait-Si-Ali, Takahiko Akematsu, Emmanuel T Akporiaye, Mohamed Al-Rubeai, Guillermo M Albaiceta, Chris Albanese, Diego Albani, Matthew L Albert, Jesus Aldudo, Hana Algül, Mehrdad Alirezaei, Iraide Alloza, Alexandru Almasan, Maylin Almonte-Beceril, Emad S Alnemri, Covadonga Alonso, Nihal Altan-Bonnet, Dario C Altieri, Silvia Alvarez, Lydia Alvarez-Erviti, Sandro Alves, Giuseppina Amadoro, Atsuo Amano, Consuelo Amantini, Santiago Ambrosio, Ivano Amelio, Amal O Amer, Mohamed Amessou, Angelika Amon, Zhenyi An, Frank A Anania, Stig U Andersen, Usha P Andley, Catherine K Andreadi, Nathalie Andrieu-Abadie, Alberto Anel, David K Ann, Shailendra Anoopkumar-Dukie, Manuela Antonioli, Hiroshi Aoki, Nadezda Apostolova, Saveria Aquila, Katia Aquilano, Koichi Araki, Eli Arama, Agustin Aranda, Jun Araya, Alexandre Arcaro, Esperanza Arias, Hirokazu Arimoto, Aileen R Ariosa, Jane L Armstrong, Thierry Arnould, Ivica Arsov, Katsuhiko Asanuma, Valerie Askanas, Eric Asselin, Ryuichiro Atarashi, Sally S Atherton, Julie D Atkin, Laura D Attardi, Patrick Auberger, Georg Auburger, Laure Aurelian, Riccardo Autelli, Laura Avagliano, Maria Laura Avantaggiati, Limor Avrahami, Suresh Awale, Neelam Azad, Tiziana Bachetti, Jonathan M Backer, Dong-Hun Bae, Jae-Sung Bae, Ok-Nam Bae, Soo Han Bae, Eric H Baehrecke, Seung-Hoon Baek, Stephen Baghdiguian, Agnieszka Bagniewska-Zadworna, Hua Bai, Jie Bai, Xue-Yuan Bai, Yannick Bailly, Kithiganahalli Narayanaswamy Balaji, Walter Balduini, Andrea Ballabio, Rena Balzan, Rajkumar Banerjee, Gábor Bánhegyi, Haijun Bao, Benoit Barbeau, Maria D Barrachina, Esther Barreiro, Bonnie Bartel, Alberto Bartolomé, Diane C Bassham, Maria Teresa Bassi, Robert C Bast, Alakananda Basu, Maria Teresa Batista, Henri Batoko, Maurizio Battino, Kyle Bauckman, Bradley L Baumgarner, K Ulrich Bayer, Rupert Beale, Jean-François Beaulieu, George R Beck, Christoph Becker, J David Beckham, Pierre-André Bédard, Patrick J Bednarski, Thomas J Begley, Christian Behl, Christian Behrends, Georg Mn Behrens, Kevin E Behrns, Eloy Bejarano, Amine Belaid, Francesca Belleudi, Giovanni Bénard, Guy Berchem, Daniele Bergamaschi, Matteo Bergami, Ben Berkhout, Laura Berliocchi, Amélie Bernard, Monique Bernard, Francesca Bernassola, Anne Bertolotti, Amanda S Bess, Sébastien Besteiro, Saverio Bettuzzi, Savita Bhalla, Shalmoli Bhattacharyya, Sujit K Bhutia, Caroline Biagosch, Michele Wolfe Bianchi, Martine Biard-Piechaczyk, Viktor Billes, Claudia Bincoletto, Baris Bingol, Sara W Bird, Marc Bitoun, Ivana Bjedov, Craig Blackstone, Lionel Blanc, Guillermo A Blanco, Heidi Kiil Blomhoff, Emilio Boada-Romero, Stefan Böckler, Marianne Boes, Kathleen Boesze-Battaglia, Lawrence H Boise, Alessandra Bolino, Andrea Boman, Paolo Bonaldo, Matteo Bordi, Jürgen Bosch, Luis M Botana, Joelle Botti, German Bou, Marina Bouché, Marion Bouchecareilh, Marie-Josée Boucher, Michael E Boulton, Sebastien G Bouret, Patricia Boya, Michaël Boyer-Guittaut, Peter V Bozhkov, Nathan Brady, Vania Mm Braga, Claudio Brancolini, Gerhard H Braus, José M Bravo-San Pedro, Lisa A Brennan, Emery H Bresnick, Patrick Brest, Dave Bridges, Marie-Agnès Bringer, Marisa Brini, Glauber C Brito, Bertha Brodin, Paul S Brookes, Eric J Brown, Karen Brown, Hal E Broxmeyer, Alain Bruhat, Patricia Chakur Brum, John H Brumell, Nicola Brunetti-Pierri, Robert J Bryson-Richardson, Shilpa Buch, Alastair M Buchan, Hikmet Budak, Dmitry V Bulavin, Scott J Bultman, Geert Bultynck, Vladimir Bumbasirevic, Yan Burelle, Robert E Burke, Margit Burmeister, Peter Bütikofer, Laura Caberlotto, Ken Cadwell, Monika Cahova, Dongsheng Cai, Jingjing Cai, Qian Cai, Sara Calatayud, Nadine Camougrand, Michelangelo Campanella, Grant R Campbell, Matthew Campbell, Silvia Campello, Robin Candau, Isabella Caniggia, Lavinia Cantoni, Lizhi Cao, Allan B Caplan, Michele Caraglia, Claudio Cardinali, Sandra Morais Cardoso, Jennifer S Carew, Laura A Carleton, Cathleen R Carlin, Silvia Carloni, Sven R Carlsson, Didac Carmona-Gutierrez, Leticia Am Carneiro, Oliana Carnevali, Serena Carra, Alice Carrier, Bernadette Carroll, Caty Casas, Josefina Casas, Giuliana Cassinelli, Perrine Castets, Susana Castro-Obregon, Gabriella Cavallini, Isabella Ceccherini, Francesco Cecconi, Arthur I Cederbaum, Valentín Ceña, Simone Cenci, Claudia Cerella, Davide Cervia, Silvia Cetrullo, Hassan Chaachouay, Han-Jung Chae, Andrei S Chagin, Chee-Yin Chai, Gopal Chakrabarti, Georgios Chamilos, Edmond Yw Chan, Matthew Tv Chan, Dhyan Chandra, Pallavi Chandra, Chih-Peng Chang, Raymond Chuen-Chung Chang, Ta Yuan Chang, John C Chatham, Saurabh Chatterjee, Santosh Chauhan, Yongsheng Che, Michael E Cheetham, Rajkumar Cheluvappa, Chun-Jung Chen, Gang Chen, Guang-Chao Chen, Guoqiang Chen, Hongzhuan Chen, Jeff W Chen, Jian-Kang Chen, Min Chen, Mingzhou Chen, Peiwen Chen, Qi Chen, Quan Chen, Shang-Der Chen, Si Chen, Steve S-L Chen, Wei Chen, Wei-Jung Chen, Wen Qiang Chen, Wenli Chen, Xiangmei Chen, Yau-Hung Chen, Ye-Guang Chen, Yin Chen, Yingyu Chen, Yongshun Chen, Yu-Jen Chen, Yue-Qin Chen, Yujie Chen, Zhen Chen, Zhong Chen, Alan Cheng, Christopher Hk Cheng, Hua Cheng, Heesun Cheong, Sara Cherry, Jason Chesney, Chun Hei Antonio Cheung, Eric Chevet, Hsiang Cheng Chi, Sung-Gil Chi, Fulvio Chiacchiera, Hui-Ling Chiang, Roberto Chiarelli, Mario Chiariello, Marcello Chieppa, Lih-Shen Chin, Mario Chiong, Gigi Nc Chiu, Dong-Hyung Cho, Ssang-Goo Cho, William C Cho, Yong-Yeon Cho, Young-Seok Cho, Augustine Mk Choi, Eui-Ju Choi, Eun-Kyoung Choi, Jayoung Choi, Mary E Choi, Seung-Il Choi, Tsui-Fen Chou, Salem Chouaib, Divaker Choubey, Vinay Choubey, Kuan-Chih Chow, Kamal Chowdhury, Charleen T Chu, Tsung-Hsien Chuang, Taehoon Chun, Hyewon Chung, Taijoon Chung, Yuen-Li Chung, Yong-Joon Chwae, Valentina Cianfanelli, Roberto Ciarcia, Iwona A Ciechomska, Maria Rosa Ciriolo, Mara Cirone, Sofie Claerhout, Michael J Clague, Joan Clària, Peter Gh Clarke, Robert Clarke, Emilio Clementi, Cédric Cleyrat, Miriam Cnop, Eliana M Coccia, Tiziana Cocco, Patrice Codogno, Jörn Coers, Ezra Ew Cohen, David Colecchia, Luisa Coletto, Núria S Coll, Emma Colucci-Guyon, Sergio Comincini, Maria Condello, Katherine L Cook, Graham H Coombs, Cynthia D Cooper, J Mark Cooper, Isabelle Coppens, Maria Tiziana Corasaniti, Marco Corazzari, Ramon Corbalan, Elisabeth Corcelle-Termeau, Mario D Cordero, Cristina Corral-Ramos, Olga Corti, Andrea Cossarizza, Paola Costelli, Safia Costes, Susan L Cotman, Ana Coto-Montes, Sandra Cottet, Eduardo Couve, Lori R Covey, L Ashley Cowart, Jeffery S Cox, Fraser P Coxon, Carolyn B Coyne, Mark S Cragg, Rolf J Craven, Tiziana Crepaldi, Jose L Crespo, Alfredo Criollo, Valeria Crippa, Maria Teresa Cruz, Ana Maria Cuervo, Jose M Cuezva, Taixing Cui, Pedro R Cutillas, Mark J Czaja, Maria F Czyzyk-Krzeska, Ruben K Dagda, Uta Dahmen, Chunsun Dai, Wenjie Dai, Yun Dai, Kevin N Dalby, Luisa Dalla Valle, Guillaume Dalmasso, Marcello D'Amelio, Markus Damme, Arlette Darfeuille-Michaud, Catherine Dargemont, Victor M Darley-Usmar, Srinivasan Dasarathy, Biplab Dasgupta, Srikanta Dash, Crispin R Dass, Hazel Marie Davey, Lester M Davids, David Dávila, Roger J Davis, Ted M Dawson, Valina L Dawson, Paula Daza, Jackie de Belleroche, Paul de Figueiredo, Regina Celia Bressan Queiroz de Figueiredo, José de la Fuente, Luisa De Martino, Antonella De Matteis, Guido Ry De Meyer, Angelo De Milito, Mauro De Santi, Wanderley de Souza, Vincenzo De Tata, Daniela De Zio, Jayanta Debnath, Reinhard Dechant, Jean-Paul Decuypere, Shane Deegan, Benjamin Dehay, Barbara Del Bello, Dominic P Del Re, Régis Delage-Mourroux, Lea Md Delbridge, Louise Deldicque, Elizabeth Delorme-Axford, Yizhen Deng, Joern Dengjel, Melanie Denizot, Paul Dent, Channing J Der, Vojo Deretic, Benoît Derrien, Eric Deutsch, Timothy P Devarenne, Rodney J Devenish, Sabrina Di Bartolomeo, Nicola Di Daniele, Fabio Di Domenico, Alessia Di Nardo, Simone Di Paola, Antonio Di Pietro, Livia Di Renzo, Aaron DiAntonio, Guillermo Díaz-Araya, Ines Díaz-Laviada, Maria T Diaz-Meco, Javier Diaz-Nido, Chad A Dickey, Robert C Dickson, Marc Diederich, Paul Digard, Ivan Dikic, Savithrama P Dinesh-Kumar, Chan Ding, Wen-Xing Ding, Zufeng Ding, Luciana Dini, Jörg Hw Distler, Abhinav Diwan, Mojgan Djavaheri-Mergny, Kostyantyn Dmytruk, Renwick Cj Dobson, Volker Doetsch, Karol Dokladny, Svetlana Dokudovskaya, Massimo Donadelli, X Charlie Dong, Xiaonan Dong, Zheng Dong, Terrence M Donohue, Kelly S Doran, Gabriella D'Orazi, Gerald W Dorn, Victor Dosenko, Sami Dridi, Liat Drucker, Jie Du, Li-Lin Du, Lihuan Du, André du Toit, Priyamvada Dua, Lei Duan, Pu Duann, Vikash Kumar Dubey, Michael R Duchen, Michel A Duchosal, Helene Duez, Isabelle Dugail, Verónica I Dumit, Mara C Duncan, Elaine A Dunlop, William A Dunn, Nicolas Dupont, Luc Dupuis, Raúl V Durán, Thomas M Durcan, Stéphane Duvezin-Caubet, Umamaheswar Duvvuri, Vinay Eapen, Darius Ebrahimi-Fakhari, Arnaud Echard, Leopold Eckhart, Charles L Edelstein, Aimee L Edinger, Ludwig Eichinger, Tobias Eisenberg, Avital Eisenberg-Lerner, N Tony Eissa, Wafik S El-Deiry, Victoria El-Khoury, Zvulun Elazar, Hagit Eldar-Finkelman, Chris Jh Elliott, Enzo Emanuele, Urban Emmenegger, Nikolai Engedal, Anna-Mart Engelbrecht, Simone Engelender, Jorrit M Enserink, Ralf Erdmann, Jekaterina Erenpreisa, Rajaraman Eri, Jason L Eriksen, Andreja Erman, Ricardo Escalante, Eeva-Liisa Eskelinen, Lucile Espert, Lorena Esteban-Martínez, Thomas J Evans, Mario Fabri, Gemma Fabrias, Cinzia Fabrizi, Antonio Facchiano, Nils J Færgeman, Alberto Faggioni, W Douglas Fairlie, Chunhai Fan, Daping Fan, Jie Fan, Shengyun Fang, Manolis Fanto, Alessandro Fanzani, Thomas Farkas, Mathias Faure, Francois B Favier, Howard Fearnhead, Massimo Federici, Erkang Fei, Tania C Felizardo, Hua Feng, Yibin Feng, Yuchen Feng, Thomas A Ferguson, Álvaro F Fernández, Maite G Fernandez-Barrena, Jose C Fernandez-Checa, Arsenio Fernández-López, Martin E Fernandez-Zapico, Olivier Feron, Elisabetta Ferraro, Carmen Veríssima Ferreira-Halder, Laszlo Fesus, Ralph Feuer, Fabienne C Fiesel, Eduardo C Filippi-Chiela, Giuseppe Filomeni, Gian Maria Fimia, John H Fingert, Steven Finkbeiner, Toren Finkel, Filomena Fiorito, Paul B Fisher, Marc Flajolet, Flavio Flamigni, Oliver Florey, Salvatore Florio, R Andres Floto, Marco Folini, Carlo Follo, Edward A Fon, Francesco Fornai, Franco Fortunato, Alessandro Fraldi, Rodrigo Franco, Arnaud Francois, Aurélie François, Lisa B Frankel, Iain Dc Fraser, Norbert Frey, Damien G Freyssenet, Christian Frezza, Scott L Friedman, Daniel E Frigo, Dongxu Fu, José M Fuentes, Juan Fueyo, Yoshio Fujitani, Yuuki Fujiwara, Mikihiro Fujiya, Mitsunori Fukuda, Simone Fulda, Carmela Fusco, Bozena Gabryel, Matthias Gaestel, Philippe Gailly, Malgorzata Gajewska, Sehamuddin Galadari, Gad Galili, Inmaculada Galindo, Maria F Galindo, Giovanna Galliciotti, Lorenzo Galluzzi, Luca Galluzzi, Vincent Galy, Noor Gammoh, Sam Gandy, Anand K Ganesan, Swamynathan Ganesan, Ian G Ganley, Monique Gannagé, Fen-Biao Gao, Feng Gao, Jian-Xin Gao, Lorena García Nannig, Eleonora García Véscovi, Marina Garcia-Macía, Carmen Garcia-Ruiz, Abhishek D Garg, Pramod Kumar Garg, Ricardo Gargini, Nils Christian Gassen, Damián Gatica, Evelina Gatti, Julie Gavard, Evripidis Gavathiotis, Liang Ge, Pengfei Ge, Shengfang Ge, Po-Wu Gean, Vania Gelmetti, Armando A Genazzani, Jiefei Geng, Pascal Genschik, Lisa Gerner, Jason E Gestwicki, David A Gewirtz, Saeid Ghavami, Eric Ghigo, Debabrata Ghosh, Anna Maria Giammarioli, Francesca Giampieri, Claudia Giampietri, Alexandra Giatromanolaki, Derrick J Gibbings, Lara Gibellini, Spencer B Gibson, Vanessa Ginet, Antonio Giordano, Flaviano Giorgini, Elisa Giovannetti, Stephen E Girardin, 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Sahni, Pothana Saikumar, Tsunenori Saito, Tatsuya Saitoh, Koichi Sakakura, Machiko Sakoh-Nakatogawa, Yasuhito Sakuraba, María Salazar-Roa, Paolo Salomoni, Ashok K Saluja, Paul M Salvaterra, Rosa Salvioli, Afshin Samali, Anthony Mj Sanchez, José A Sánchez-Alcázar, Ricardo Sanchez-Prieto, Marco Sandri, Miguel A Sanjuan, Stefano Santaguida, Laura Santambrogio, Giorgio Santoni, Claudia Nunes Dos Santos, Shweta Saran, Marco Sardiello, Graeme Sargent, Pallabi Sarkar, Sovan Sarkar, Maria Rosa Sarrias, Minnie M Sarwal, Chihiro Sasakawa, Motoko Sasaki, Miklos Sass, Ken Sato, Miyuki Sato, Joseph Satriano, Niramol Savaraj, Svetlana Saveljeva, Liliana Schaefer, Ulrich E Schaible, Michael Scharl, Hermann M Schatzl, Randy Schekman, Wiep Scheper, Alfonso Schiavi, Hyman M Schipper, Hana Schmeisser, Jens Schmidt, Ingo Schmitz, Bianca E Schneider, E Marion Schneider, Jaime L Schneider, Eric A Schon, Miriam J Schönenberger, Axel H Schönthal, Daniel F Schorderet, Bernd Schröder, Sebastian Schuck, Ryan J Schulze, Melanie Schwarten, Thomas L Schwarz, Sebastiano Sciarretta, Kathleen Scotto, A Ivana Scovassi, Robert A Screaton, Mark Screen, Hugo Seca, Simon Sedej, Laura Segatori, Nava Segev, Per O Seglen, Jose M Seguí-Simarro, Juan Segura-Aguilar, Ekihiro Seki, Christian Sell, Iban Selliez, Clay F Semenkovich, Gregg L Semenza, Utpal Sen, Andreas L Serra, Ana Serrano-Puebla, Hiromi Sesaki, Takao Setoguchi, Carmine Settembre, John J Shacka, Ayesha N Shajahan-Haq, Irving M Shapiro, Shweta Sharma, Hua She, C-K James Shen, Chiung-Chyi Shen, Han-Ming Shen, Sanbing Shen, Weili Shen, Rui Sheng, Xianyong Sheng, Zu-Hang Sheng, Trevor G Shepherd, Junyan Shi, Qiang Shi, Qinghua Shi, Yuguang Shi, Shusaku Shibutani, Kenichi Shibuya, Yoshihiro Shidoji, Jeng-Jer Shieh, Chwen-Ming Shih, Yohta Shimada, Shigeomi Shimizu, Dong Wook Shin, Mari L Shinohara, Michiko Shintani, Takahiro Shintani, Tetsuo Shioi, Ken Shirabe, Ronit Shiri-Sverdlov, Orian Shirihai, Gordon C Shore, Chih-Wen Shu, Deepak Shukla, Andriy A Sibirny, Valentina Sica, Christina J Sigurdson, Einar M Sigurdsson, Puran Singh Sijwali, Beata Sikorska, Wilian A Silveira, Sandrine Silvente-Poirot, Gary A Silverman, Jan Simak, Thomas Simmet, Anna Katharina Simon, Hans-Uwe Simon, Cristiano Simone, Matias Simons, Anne Simonsen, Rajat Singh, Shivendra V Singh, Shrawan K Singh, Debasish Sinha, Sangita Sinha, Frank A Sinicrope, Agnieszka Sirko, Kapil Sirohi, Balindiwe Jn Sishi, Annie Sittler, Parco M Siu, Efthimios Sivridis, Anna Skwarska, Ruth Slack, Iva Slaninová, Nikolai Slavov, Soraya S Smaili, Keiran Sm Smalley, Duncan R Smith, Stefaan J Soenen, Scott A Soleimanpour, Anita Solhaug, Kumaravel Somasundaram, Jin H Son, Avinash Sonawane, Chunjuan Song, Fuyong Song, Hyun Kyu Song, Ju-Xian Song, Wei Song, Kai Y Soo, Anil K Sood, Tuck Wah Soong, Virawudh Soontornniyomkij, Maurizio Sorice, Federica Sotgia, David R Soto-Pantoja, Areechun Sotthibundhu, Maria João Sousa, Herman P Spaink, Paul N Span, Anne Spang, Janet D Sparks, Peter G Speck, Stephen A Spector, Claudia D Spies, Wolfdieter Springer, Daret St Clair, Alessandra Stacchiotti, Bart Staels, Michael T Stang, Daniel T Starczynowski, Petro Starokadomskyy, Clemens Steegborn, John W Steele, Leonidas Stefanis, Joan Steffan, Christine M Stellrecht, Harald Stenmark, Tomasz M Stepkowski, Stęphan T Stern, Craig Stevens, Brent R Stockwell, Veronika Stoka, Zuzana Storchova, Björn Stork, Vassilis Stratoulias, Dimitrios J Stravopodis, Pavel Strnad, Anne Marie Strohecker, Anna-Lena Ström, Per Stromhaug, Jiri Stulik, Yu-Xiong Su, Zhaoliang Su, Carlos S Subauste, Srinivasa Subramaniam, Carolyn M Sue, Sang Won Suh, Xinbing Sui, Supawadee Sukseree, David Sulzer, Fang-Lin Sun, Jiaren Sun, Jun Sun, Shi-Yong Sun, Yang Sun, Yi Sun, Yingjie Sun, Vinod Sundaramoorthy, Joseph Sung, Hidekazu Suzuki, Kuninori Suzuki, Naoki Suzuki, Tadashi Suzuki, Yuichiro J Suzuki, Michele S Swanson, Charles Swanton, Karl Swärd, Ghanshyam Swarup, Sean T Sweeney, Paul W Sylvester, Zsuzsanna Szatmari, Eva Szegezdi, Peter W Szlosarek, Heinrich Taegtmeyer, Marco Tafani, Emmanuel Taillebourg, Stephen Wg Tait, Krisztina Takacs-Vellai, Yoshinori Takahashi, Szabolcs Takáts, Genzou Takemura, Nagio Takigawa, Nicholas J Talbot, Elena Tamagno, Jerome Tamburini, Cai-Ping Tan, Lan Tan, Mei Lan Tan, Ming Tan, Yee-Joo Tan, Keiji Tanaka, Masaki Tanaka, Daolin Tang, Dingzhong Tang, Guomei Tang, Isei Tanida, Kunikazu Tanji, Bakhos A Tannous, Jose A Tapia, Inmaculada Tasset-Cuevas, Marc Tatar, Iman Tavassoly, Nektarios Tavernarakis, Allen Taylor, Graham S Taylor, Gregory A Taylor, J Paul Taylor, Mark J Taylor, Elena V Tchetina, Andrew R Tee, Fatima Teixeira-Clerc, Sucheta Telang, Tewin Tencomnao, Ba-Bie Teng, Ru-Jeng Teng, Faraj Terro, Gianluca Tettamanti, Arianne L Theiss, Anne E Theron, Kelly Jean Thomas, Marcos P Thomé, Paul G Thomes, Andrew Thorburn, Jeremy Thorner, Thomas Thum, Michael Thumm, Teresa Lm Thurston, Ling Tian, Andreas Till, Jenny Pan-Yun Ting, Vladimir I Titorenko, Lilach Toker, Stefano Toldo, Sharon A Tooze, Ivan Topisirovic, Maria Lyngaas Torgersen, Liliana Torosantucci, Alicia Torriglia, Maria Rosaria Torrisi, Cathy Tournier, Roberto Towns, Vladimir Trajkovic, Leonardo H Travassos, Gemma Triola, Durga Nand Tripathi, Daniela Trisciuoglio, Rodrigo Troncoso, Ioannis P Trougakos, Anita C Truttmann, Kuen-Jer Tsai, Mario P Tschan, Yi-Hsin Tseng, Takayuki Tsukuba, Allan Tsung, Andrey S Tsvetkov, Shuiping Tu, Hsing-Yu Tuan, Marco Tucci, David A Tumbarello, Boris Turk, Vito Turk, Robin Fb Turner, Anders A Tveita, Suresh C Tyagi, Makoto Ubukata, Yasuo Uchiyama, Andrej Udelnow, Takashi Ueno, Midori Umekawa, Rika Umemiya-Shirafuji, Benjamin R Underwood, Christian Ungermann, Rodrigo P Ureshino, Ryo Ushioda, Vladimir N Uversky, Néstor L Uzcátegui, Thomas Vaccari, Maria I Vaccaro, Libuše Váchová, Helin Vakifahmetoglu-Norberg, Rut Valdor, Enza Maria Valente, Francois Vallette, Angela M Valverde, Greet Van den Berghe, Ludo Van Den Bosch, Gijs R van den Brink, F Gisou van der Goot, Ida J van der Klei, Luc Jw van der Laan, Wouter G van Doorn, Marjolein van Egmond, Kenneth L van Golen, Luc Van Kaer, Menno van Lookeren Campagne, Peter Vandenabeele, Wim Vandenberghe, Ilse Vanhorebeek, Isabel Varela-Nieto, M Helena Vasconcelos, Radovan Vasko, Demetrios G Vavvas, Ignacio Vega-Naredo, Guillermo Velasco, Athanassios D Velentzas, Panagiotis D Velentzas, Tibor Vellai, Edo Vellenga, Mikkel Holm Vendelbo, Kartik Venkatachalam, Natascia Ventura, Salvador Ventura, Patrícia St Veras, Mireille Verdier, Beata G Vertessy, Andrea Viale, Michel Vidal, Helena L A Vieira, Richard D Vierstra, Nadarajah Vigneswaran, Neeraj Vij, Miquel Vila, Margarita Villar, Victor H Villar, Joan Villarroya, Cécile Vindis, Giampietro Viola, Maria Teresa Viscomi, Giovanni Vitale, Dan T Vogl, Olga V Voitsekhovskaja, Clarissa von Haefen, Karin von Schwarzenberg, Daniel E Voth, Valérie Vouret-Craviari, Kristina Vuori, Jatin M Vyas, Christian Waeber, Cheryl Lyn Walker, Mark J Walker, Jochen Walter, Lei Wan, Xiangbo Wan, Bo Wang, Caihong Wang, Chao-Yung Wang, Chengshu Wang, Chenran Wang, Chuangui Wang, Dong Wang, Fen Wang, Fuxin Wang, Guanghui Wang, Hai-Jie Wang, Haichao Wang, Hong-Gang Wang, Hongmin Wang, Horng-Dar Wang, Jing Wang, Junjun Wang, Mei Wang, Mei-Qing Wang, Pei-Yu Wang, Peng Wang, Richard C Wang, Shuo Wang, Ting-Fang Wang, Xian Wang, Xiao-Jia Wang, Xiao-Wei Wang, Xin Wang, Xuejun Wang, Yan Wang, Yanming Wang, Ying Wang, Ying-Jan Wang, Yipeng Wang, Yu Wang, Yu Tian Wang, Yuqing Wang, Zhi-Nong Wang, Pablo Wappner, Carl Ward, Diane McVey Ward, Gary Warnes, Hirotaka Watada, Yoshihisa Watanabe, Kei Watase, Timothy E Weaver, Colin D Weekes, Jiwu Wei, Thomas Weide, Conrad C Weihl, Günther Weindl, Simone Nardin Weis, Longping Wen, Xin Wen, Yunfei Wen, Benedikt Westermann, Cornelia M Weyand, Anthony R White, Eileen White, J Lindsay Whitton, Alexander J Whitworth, Joëlle Wiels, Franziska Wild, Manon E Wildenberg, Tom Wileman, Deepti Srinivas Wilkinson, Simon Wilkinson, Dieter Willbold, Chris Williams, Katherine Williams, Peter R Williamson, Konstanze F Winklhofer, Steven S Witkin, Stephanie E Wohlgemuth, Thomas Wollert, Ernst J Wolvetang, Esther Wong, G William Wong, Richard W Wong, Vincent Kam Wai Wong, Elizabeth A Woodcock, Karen L Wright, Chunlai Wu, Defeng Wu, Gen Sheng Wu, Jian Wu, Junfang Wu, Mian Wu, Min Wu, Shengzhou Wu, William Kk Wu, Yaohua Wu, Zhenlong Wu, Cristina Pr Xavier, Ramnik J Xavier, Gui-Xian Xia, Tian Xia, Weiliang Xia, Yong Xia, Hengyi Xiao, Jian Xiao, Shi Xiao, Wuhan Xiao, Chuan-Ming Xie, Zhiping Xie, Zhonglin Xie, Maria Xilouri, Yuyan Xiong, Chuanshan Xu, Congfeng Xu, Feng Xu, Haoxing Xu, Hongwei Xu, Jian Xu, Jianzhen Xu, Jinxian Xu, Liang Xu, Xiaolei Xu, Yangqing Xu, Ye Xu, Zhi-Xiang Xu, Ziheng Xu, Yu Xue, Takahiro Yamada, Ai Yamamoto, Koji Yamanaka, Shunhei Yamashina, Shigeko Yamashiro, Bing Yan, Bo Yan, Xianghua Yan, Zhen Yan, Yasuo Yanagi, Dun-Sheng Yang, Jin-Ming Yang, Liu Yang, Minghua Yang, Pei-Ming Yang, Peixin Yang, Qian Yang, Wannian Yang, Wei Yuan Yang, Xuesong Yang, Yi Yang, Ying Yang, Zhifen Yang, Zhihong Yang, Meng-Chao Yao, Pamela J Yao, Xiaofeng Yao, Zhenyu Yao, Zhiyuan Yao, Linda S Yasui, Mingxiang Ye, Barry Yedvobnick, Behzad Yeganeh, Elizabeth S Yeh, Patricia L Yeyati, Fan Yi, Long Yi, Xiao-Ming Yin, Calvin K Yip, Yeong-Min Yoo, Young Hyun Yoo, Seung-Yong Yoon, Ken-Ichi Yoshida, Tamotsu Yoshimori, Ken H Young, Huixin Yu, Jane J Yu, Jin-Tai Yu, Jun Yu, Li Yu, W Haung Yu, Xiao-Fang Yu, Zhengping Yu, Junying Yuan, Zhi-Min Yuan, Beatrice Yjt Yue, Jianbo Yue, Zhenyu Yue, David N Zacks, Eldad Zacksenhaus, Nadia Zaffaroni, Tania Zaglia, Zahra Zakeri, Vincent Zecchini, Jinsheng Zeng, Min Zeng, Qi Zeng, Antonis S Zervos, Donna D Zhang, Fan Zhang, Guo Zhang, Guo-Chang Zhang, Hao Zhang, Hong Zhang, Hong Zhang, Hongbing Zhang, Jian Zhang, Jian Zhang, Jiangwei Zhang, Jianhua Zhang, Jing-Pu Zhang, Li Zhang, Lin Zhang, Lin Zhang, Long Zhang, Ming-Yong Zhang, Xiangnan Zhang, Xu Dong Zhang, Yan Zhang, Yang Zhang, Yanjin Zhang, Yingmei Zhang, Yunjiao Zhang, Mei Zhao, Wei-Li Zhao, Xiaonan Zhao, Yan G Zhao, Ying Zhao, Yongchao Zhao, Yu-Xia Zhao, Zhendong Zhao, Zhizhuang J Zhao, Dexian Zheng, Xi-Long Zheng, Xiaoxiang Zheng, Boris Zhivotovsky, Qing Zhong, Guang-Zhou Zhou, Guofei Zhou, Huiping Zhou, Shu-Feng Zhou, Xu-Jie Zhou, Hongxin Zhu, Hua Zhu, Wei-Guo Zhu, Wenhua Zhu, Xiao-Feng Zhu, Yuhua Zhu, Shi-Mei Zhuang, Xiaohong Zhuang, Elio Ziparo, Christos E Zois, Teresa Zoladek, Wei-Xing Zong, Antonio Zorzano, Susu M Zughaier (2016 Jan 23)

Guidelines for the use and interpretation of assays for monitoring autophagy (3rd edition).

Autophagy : 1-222 : DOI : 10.1080/15548627.2015.1100356 En savoir plus
Résumé

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Luciana Batista, Brigitte Bourachot, Bogdan Mateescu, Fabien Reyal, Fatima Mechta-Grigoriou (2016 Jan 5)

Regulation of miR-200c/141 expression by intergenic DNA-looping and transcriptional read-through.

Nature communications : 8959 : DOI : 10.1038/ncomms9959 En savoir plus
Résumé

The miR-200 family members have been implicated in stress responses and ovarian tumorigenesis. Here, we find that miR-200c/141 transcription is intimately linked to the transcription of the proximal upstream gene PTPN6 (SHP1) in all physiological conditions tested. PTPN6 and miR-200c/141 are transcriptionally co-regulated by two complementary mechanisms. First, a bypass of the regular PTPN6 polyadenylation signal allows the transcription of the downstream miR-200c/141. Second, the promoters of the PTPN6 and miR-200c/141 transcription units physically interact through a 3-dimensional DNA loop and exhibit similar epigenetic regulation. Our findings highlight that transcription of intergenic miRNAs is a novel outcome of transcriptional read-through and reveal a yet unexplored type of DNA loop associating two closely located promoters. These mechanisms have significant relevance in ovarian cancers and stress response, pathophysiological conditions in which miR-200c/141 exert key functions.

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Année de publication : 2015

Tina Gruosso, Camille Garnier, Sophie Abelanet, Yann Kieffer, Vincent Lemesre, Dorine Bellanger, Ivan Bieche, Elisabetta Marangoni, Xavier Sastre-Garau, Virginie Mieulet, Fatima Mechta-Grigoriou (2015 Oct 13)

MAP3K8/TPL-2/COT is a potential predictive marker for MEK inhibitor treatment in high-grade serous ovarian carcinomas.

Nature communications : 8583 : DOI : 10.1038/ncomms9583 En savoir plus
Résumé

Ovarian cancer is a silent disease with a poor prognosis that urgently requires new therapeutic strategies. In low-grade ovarian tumours, mutations in the MAP3K BRAF gene constitutively activate the downstream kinase MEK. Here we demonstrate that an additional MAP3K, MAP3K8 (TPL-2/COT), accumulates in high-grade serous ovarian carcinomas (HGSCs) and is a potential prognostic marker for these tumours. By combining analyses on HGSC patient cohorts, ovarian cancer cells and patient-derived xenografts, we demonstrate that MAP3K8 controls cancer cell proliferation and migration by regulating key players in G1/S transition and adhesion dynamics. In addition, we show that the MEK pathway is the main pathway involved in mediating MAP3K8 function, and that MAP3K8 exhibits a reliable predictive value for the effectiveness of MEK inhibitor treatment. Our data highlight key roles for MAP3K8 in HGSC and indicate that MEK inhibitors could be a useful treatment strategy, in combination with conventional chemotherapy, for this disease.

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Année de publication : 2014

Benjamin G Cuiffo, Antoine Campagne, George W Bell, Antonio Lembo, Francesca Orso, Evan C Lien, Manoj K Bhasin, Monica Raimo, Summer E Hanson, Andriy Marusyk, Dorraya El-Ashry, Peiman Hematti, Kornelia Polyak, Fatima Mechta-Grigoriou, Odette Mariani, Stefano Volinia, Anne Vincent-Salomon, Daniela Taverna, Antoine E Karnoub (2014 Dec 18)

MSC-regulated microRNAs converge on the transcription factor FOXP2 and promote breast cancer metastasis.

Cell stem cell : 762-74 : DOI : 10.1016/j.stem.2014.10.001 En savoir plus
Résumé

Mesenchymal stem/stromal cells (MSCs) are progenitor cells shown to participate in breast tumor stroma formation and to promote metastasis. Despite expanding knowledge of their contributions to breast malignancy, the underlying molecular responses of breast cancer cells (BCCs) to MSC influences remain incompletely understood. Here, we show that MSCs cause aberrant expression of microRNAs, which, led by microRNA-199a, provide BCCs with enhanced cancer stem cell (CSC) properties. We demonstrate that such MSC-deregulated microRNAs constitute a network that converges on and represses the expression of FOXP2, a forkhead transcription factor tightly associated with speech and language development. FOXP2 knockdown in BCCs was sufficient in promoting CSC propagation, tumor initiation, and metastasis. Importantly, elevated microRNA-199a and depressed FOXP2 expression levels are prominent features of malignant clinical breast cancer and are associated significantly with poor survival. Our results identify molecular determinants of cancer progression of potential utility in the prognosis and therapy of breast cancer.

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Année de publication : 2013

Ana Costa, Alix Scholer-Dahirel, Fatima Mechta-Grigoriou (2013 Jul 30)

The role of reactive oxygen species and metabolism on cancer cells and their microenvironment.

Seminars in cancer biology : 23-32 : DOI : 10.1016/j.semcancer.2013.12.007 En savoir plus
Résumé

Compelling evidence show that reactive oxygen species (ROS) levels are finely regulated in the cell and can act as « second messengers » in response to diverse stimuli. In tumor epithelial cells, ROS accumulate abnormally and induce signaling cascades that mediate the oncogenic phenotype. In addition to their impact on tumor epithelial cells, ROS also affect the surrounding cells that constitute the tumor microenvironment. Indeed, ROS production increases tumor angiogenesis, drives the onset of inflammation and promotes conversion of fibroblast into myofibroblasts. These cells, initially identified upon wound healing, exhibit similar properties to those observed in fibroblasts associated with aggressive adenocarcinomas. Indeed, analyses of tumors with distinct severity revealed the existence of multiple distinct co-existing subtypes of carcinoma-associated fibroblasts (CAFs), with specific marker protein profiling. Chronic oxidative stress deeply modifies the proportion of these different fibroblast subtypes, further supporting tumor growth and metastatic dissemination. At last, ROS have been implicated in the metabolic reprogramming of both cancer cells and CAFs, allowing an adaptation to oxidative stress that ultimately promotes tumorigenesis and chemoresistance. In this review, we discuss the role of ROS in cancer cells and CAFs and their impact on tumor initiation, progression, and metastasis.

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