1
|
Fayd'herbe De Maudave A, Leconet W, Toupet K, Constantinides M, Bossis G, de Toledo M, Vialaret J, Hirtz C, Lopez-Noriega A, Jorgensen C, Noël D, Louis-Plence P, Grizot S, Villalba M. Intra-articular delivery of full-length antibodies through the use of an in situ forming depot. J Control Release 2021; 341:578-590. [PMID: 34915070 DOI: 10.1016/j.jconrel.2021.12.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 11/29/2021] [Accepted: 12/06/2021] [Indexed: 12/20/2022]
Abstract
Monoclonal antibodies (mAbs) are large size molecules that have demonstrated high therapeutic potential for the treatment of cancer or autoimmune diseases. Despite some excellent results, their intravenous administration results in high plasma concentration. This triggers off-target effects and sometimes poor targeted tissue distribution. To circumvent this issue, we investigated a local controlled-delivery approach using an in situ forming depot technology. Two clinically relevant mAbs, rituximab (RTX) and daratumumab (DARA), were formulated using an injectable technology based on biodegradable PEG-PLA copolymers. The stability and controlled release features of the formulations were investigated. HPLC and mass spectrometry revealed the preservation of the protein structure. In vitro binding of formulated antibodies to their target antigens and to their cellular FcγRIIIa natural killer cell receptor was fully maintained. Furthermore, encapsulated RTX was as efficient as classical intravenous RTX treatment to inhibit the in vivo tumor growth of malignant human B cells in immunodeficient NSG mice. Finally, the intra-articular administration of the formulated mAbs yielded a sustained local release associated with a lower plasma concentration compared to the intra-articular delivery of non-encapsulated mAbs. Our results demonstrate that the utilization of this polymeric technology is a reliable alternative for the local delivery of fully functional clinically relevant mAbs.
Collapse
Affiliation(s)
| | | | | | - Michael Constantinides
- IRMB, Univ Montpellier, INSERM, Montpellier, France; IRMB, CHU Montpellier, Montpellier, France
| | | | | | | | | | | | - Christian Jorgensen
- IRMB, Univ Montpellier, INSERM, Montpellier, France; IRMB, CHU Montpellier, Montpellier, France
| | - Daniele Noël
- IRMB, Univ Montpellier, INSERM, Montpellier, France; IRMB, CHU Montpellier, Montpellier, France
| | | | | | - Martin Villalba
- IRMB, Univ Montpellier, INSERM, Montpellier, France; IRMB, CHU Montpellier, Montpellier, France; IRMB, Univ Montpellier, INSERM, CNRS, CHU Montpellier, Montpellier, France; Institut Sainte-Catherine, Avignon, France.
| |
Collapse
|
2
|
Srivastava D, de Toledo M, Manchon L, Tazi J, Juge F. Modulation of Yorkie activity by alternative splicing is required for developmental stability. EMBO J 2020; 40:e104895. [PMID: 33320356 DOI: 10.15252/embj.2020104895] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Revised: 10/21/2020] [Accepted: 11/06/2020] [Indexed: 02/06/2023] Open
Abstract
The Hippo signaling pathway is a major regulator of organ growth, which controls the activity of the transcription coactivator Yorkie (Yki) in Drosophila and its homolog YAP in mammals. Both Yki and YAP proteins exist as alternatively spliced isoforms containing either one or two WW domains. The biological importance of this conserved alternative splicing event is unknown. Here, we identify the splicing factor B52 as a regulator of yki alternative splicing in Drosophila and show that B52 modulates growth in part through modulation of yki alternative splicing. Yki isoforms differ by their transcriptional activity as well as their ability to bind and bridge PPxY motifs-containing partners, and can compete in vivo. Strikingly, flies in which yki alternative splicing has been abrogated, thus expressing only Yki2 isoform, exhibit fluctuating wing asymmetry, a signal of developmental instability. Our results identify yki alternative splicing as a new level of modulation of the Hippo pathway, that is required for growth equilibration during development. This study provides the first demonstration that the process of alternative splicing contributes to developmental robustness.
Collapse
Affiliation(s)
- Diwas Srivastava
- Institut de Génétique Moléculaire de Montpellier, University of Montpellier, CNRS, Montpellier, France
| | - Marion de Toledo
- Institut de Génétique Moléculaire de Montpellier, University of Montpellier, CNRS, Montpellier, France
| | - Laurent Manchon
- Institut de Génétique Moléculaire de Montpellier, University of Montpellier, CNRS, Montpellier, France
| | - Jamal Tazi
- Institut de Génétique Moléculaire de Montpellier, University of Montpellier, CNRS, Montpellier, France
| | - François Juge
- Institut de Génétique Moléculaire de Montpellier, University of Montpellier, CNRS, Montpellier, France
| |
Collapse
|
3
|
de Toledo M, Lopez-Mejia IC, Cavelier P, Pratlong M, Barrachina C, Gromada X, Annicotte JS, Tazi J, Chavey C. Lamin C Counteracts Glucose Intolerance in Aging, Obesity, and Diabetes Through β-Cell Adaptation. Diabetes 2020; 69:647-660. [PMID: 32005707 DOI: 10.2337/db19-0377] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/18/2019] [Accepted: 01/27/2020] [Indexed: 11/13/2022]
Abstract
Aging-dependent changes in tissue function are associated with the development of metabolic diseases. However, the molecular connections linking aging, obesity, and diabetes remain unclear. Lamin A, lamin C, and progerin, products of the Lmna gene, have antagonistic functions on energy metabolism and life span. Lamin C, albeit promoting obesity, increases life span, suggesting that this isoform is crucial for maintaining healthy conditions under metabolic stresses. Because β-cell loss during obesity or aging leads to diabetes, we investigated the contribution of lamin C to β-cell function in physiopathological conditions. We demonstrate that aged lamin C only-expressing mice (Lmna LCS/LCS ) become obese but remain glucose tolerant due to adaptive mechanisms including increased β-cell mass and insulin secretion. Triggering diabetes in young mice revealed that Lmna LCS/LCS animals normalize their fasting glycemia by both increasing insulin secretion and regenerating β-cells. Genome-wide analyses combined to functional analyses revealed an increase of mitochondrial biogenesis and global translational rate in Lmna LCS/LCS islets, two major processes involved in insulin secretion. Altogether, our results demonstrate for the first time that the sole expression of lamin C protects from glucose intolerance through a β-cell-adaptive transcriptional program during metabolic stresses, highlighting Lmna gene processing as a new therapeutic target for diabetes treatment.
Collapse
Affiliation(s)
- Marion de Toledo
- Institut de Génétique Moléculaire de Montpellier, University of Montpellier, CNRS, Montpellier, France
| | | | - Patricia Cavelier
- Institut de Génétique Moléculaire de Montpellier, University of Montpellier, CNRS, Montpellier, France
| | - Marine Pratlong
- Montpellier GenomiX, Biocampus Montpellier, CNRS, INSERM, University of Montpellier, Montpellier, France
| | - Célia Barrachina
- Montpellier GenomiX, Biocampus Montpellier, CNRS, INSERM, University of Montpellier, Montpellier, France
| | - Xavier Gromada
- Université Lille, CNRS, CHU Lille, Institut Pasteur de Lille, UMR 8199, European Genomic Institute for Diabetes, Lille, France
| | - Jean-Sébastien Annicotte
- Université Lille, CNRS, CHU Lille, Institut Pasteur de Lille, UMR 8199, European Genomic Institute for Diabetes, Lille, France
| | - Jamal Tazi
- Institut de Génétique Moléculaire de Montpellier, University of Montpellier, CNRS, Montpellier, France
| | - Carine Chavey
- Institut de Génétique Moléculaire de Montpellier, University of Montpellier, CNRS, Montpellier, France
| |
Collapse
|
4
|
Zapata I, Alvarez M, Hidalgo R, Pajares B, Garcia-Anaya MJ, Toledo MD, Trigo JM, Lupiañez-Perez Y, Medina JA, Jaime Gomez-Millan J. Causes of death in patients with locally advanced head and neck cancer treated with radiotherapy and systemic therapy. BMC Cancer 2019; 19:1241. [PMID: 31864338 PMCID: PMC6925882 DOI: 10.1186/s12885-019-6427-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Accepted: 12/03/2019] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND To investigate the incidence of non-cancer mortalities and prognostic factors associated with competitive causes of death in a homogeneous cohort of patients with locally advanced head and neck cancer treated with radiotherapy and systemic treatment. METHODS This study included 284 patients with locally advanced head and neck cancer treated with radiotherapy and systemic treatment between 2005 and 2017. The cumulative incidence of death associated with tumour, second tumours, treatment, side effects and comorbidity was calculated. A Fine and Gray regression model was used to investigate factors associated with cancer and competitive mortality. RESULTS The cumulative incidence of tumoral death at 5 and 10 years were 35 and 47% respectively, whereas the cumulative incidence of competitive mortality were 10 and 12% respectively. In the multivariate analysis, age and comorbidity were independent factors for non-cancer mortality. Patients with a high risk of non-cancer mortality presented a cumulative incidence of 17.3% at 5 years and 18.4% at 10 years. CONCLUSIONS This study demonstrated a high incidence of competing mortality in older patients with comorbidities. Non-cancer deaths should be considered when selecting patients for combination therapies and in the study design ofclinical trials.
Collapse
Affiliation(s)
- I Zapata
- Radiation Oncology Department, Hospital Universitario Virgen de la Victoria, Campus Teatinos s/n., 29010, Malaga, Spain
| | - M Alvarez
- Laboratorio de biología molecular del cancer, centro de investigaciones medico-sanitarias (CIMES), Universidad de Málaga, Malaga, Spain.,Instituto de investigación biomédica de Malaga, Campus Teatinos s/n., 29010, Malaga, Spain.,Pathology Department, Hospital Universitario Virgen de la Victoria, Campus Teatinos s/n., 29010, Malaga, Spain
| | - R Hidalgo
- Servicio central de Informatica, Universidad de Malaga, Malaga, Spain
| | - B Pajares
- Medical Oncology Department, Hospital Universitario Virgen de la Victoria, Campus Teatinos s/n, 29010, Malaga, Spain
| | - M J Garcia-Anaya
- Radiation Oncology Department, Hospital Universitario Virgen de la Victoria, Campus Teatinos s/n., 29010, Malaga, Spain
| | - M D Toledo
- Radiation Oncology Department, Hospital Universitario Virgen de la Victoria, Campus Teatinos s/n., 29010, Malaga, Spain
| | - J M Trigo
- Medical Oncology Department, Hospital Universitario Virgen de la Victoria, Campus Teatinos s/n, 29010, Malaga, Spain
| | - Y Lupiañez-Perez
- Radiation Oncology Department, Hospital Universitario Virgen de la Victoria, Campus Teatinos s/n., 29010, Malaga, Spain
| | - J A Medina
- Radiation Oncology Department, Hospital Universitario Virgen de la Victoria, Campus Teatinos s/n., 29010, Malaga, Spain
| | - J Jaime Gomez-Millan
- Radiation Oncology Department, Hospital Universitario Virgen de la Victoria, Campus Teatinos s/n., 29010, Malaga, Spain. .,Instituto de investigación biomédica de Malaga, Campus Teatinos s/n., 29010, Malaga, Spain.
| |
Collapse
|
5
|
Gomez-Millan J, Pajares B, Perez-Villa L, Carnero A, Alvarez M, De Luque V, Rivas F, Trigo JM, Toledo MD, Alba E, Medina JA. Subcellular localisation of pMEK has a different prognosis in locally advanced head and neck cancer treated with concomitant radiochemotherapy. BMC Cancer 2016; 16:829. [PMID: 27793200 PMCID: PMC5084350 DOI: 10.1186/s12885-016-2869-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Accepted: 10/21/2016] [Indexed: 12/30/2022] Open
Abstract
Background MEK1 (MAP2K1) and MEK2 (MAP2K2) are closely related dual-specificity protein kinases which function by phosphorylating both serine/threonine and tyrosine residues of their substrates ERK1 and ERK2, controlling fundamental cellular processes that include cell growth and proliferation. To investigate the prognostic significance of pMEK expression in the nucleus and cytoplasm among patients with locally advanced head and neck cancer treated with concurrent radiochemotherapy. Methods Immunohistochemistry was performed on the retrieved archival tissue of 96 patients to detect pMEK, p53 and Ki-67. Results Sixty-six percent of patients were positive for pMEK expression in the nucleus and 41 % in cytoplasm. On univariate analysis, high nuclear pMEK was predictive of worse 5y-DFS and 5y-OS, with a trend to significance (26 % vs. 41 %, p = 0.09; 36 % vs. 47 %, p = 0.07). High cytoplasmic pMEK was predictive of better 5-y OS and 5-y DFS outcomes (61 % vs. 27 %, p = 0.01; 46 % vs. 22 %, p = 0.02). On multivariate analysis, low cytoplasmic pMEK and high nuclear pMEK predicted worse DFS and OS (p = 0.01; p = 0.04 and p = 0.02; p = 0.02 respectively). Conclusions Subcellular localisation of pMEK has different prognosis in locally advanced head and neck cancer treated with radiochemotherapy.
Collapse
Affiliation(s)
- J Gomez-Millan
- Radiation Oncology Department, Hospital Universitario Virgen de la Victoria, Campus Teatinos s/n, 29010, Malaga, Spain.
| | - B Pajares
- Medical Oncology Department, Hospital Universitario Virgen de la Victoria, Campus Teatinos s/n, 29010, Malaga, Spain.
| | - L Perez-Villa
- Pathology Department, Hospital Universitario Virgen de la Victoria, Campus Teatinos s/n, 29010, Malaga, Spain
| | - A Carnero
- Instituto de Biomedicina de Sevilla (IBIS), Consejo superior de investigaciones científicas, Campus Universitario Virgen del Rocío, Avda, Manuel Siurot s/n, 41013, Sevilla, Spain
| | - M Alvarez
- Pathology Department, Facultad de Medicina, UMA, Campus Teatinos s/n, 29010, Malaga, Spain
| | - V De Luque
- Medical Oncology Department, Hospital Universitario Virgen de la Victoria, Campus Teatinos s/n, 29010, Malaga, Spain
| | - F Rivas
- Agencia Sanitaria Costa del Sol, Unidad de Investigación, Autovia A-7, Km 187, 29063, Marbella, Málaga, Spain.,Red Nacional de Investigación de Servicios de Salud en Enfermedades crónicas (REDISSEC), Madrid, Spain
| | - J M Trigo
- Medical Oncology Department, Hospital Universitario Virgen de la Victoria, Campus Teatinos s/n, 29010, Malaga, Spain
| | - M D Toledo
- Radiation Oncology Department, Hospital Universitario Virgen de la Victoria, Campus Teatinos s/n, 29010, Malaga, Spain
| | - E Alba
- Medical Oncology Department, Hospital Universitario Virgen de la Victoria, Campus Teatinos s/n, 29010, Malaga, Spain
| | - J A Medina
- Radiation Oncology Department, Hospital Universitario Virgen de la Victoria, Campus Teatinos s/n, 29010, Malaga, Spain
| |
Collapse
|
6
|
Martin S, Bellora N, González-Vallinas J, Irimia M, Chebli K, de Toledo M, Raabe M, Eyras E, Urlaub H, Blencowe BJ, Tazi J. Preferential binding of a stable G3BP ribonucleoprotein complex to intron-retaining transcripts in mouse brain and modulation of their expression in the cerebellum. J Neurochem 2016; 139:349-368. [PMID: 27513819 DOI: 10.1111/jnc.13768] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2016] [Revised: 08/02/2016] [Accepted: 08/02/2016] [Indexed: 12/13/2022]
Abstract
Neuronal granules play an important role in the localization and transport of translationally silenced messenger ribonucleoproteins in neurons. Among the factors associated with these granules, the RNA-binding protein G3BP1 (stress-granules assembly factor) is involved in neuronal plasticity and is induced in Alzheimer's disease. We immunopurified a stable complex containing G3BP1 from mouse brain and performed high-throughput sequencing and cross-linking immunoprecipitation to identify the associated RNAs. The G3BP-complex contained the deubiquitinating protease USP10, CtBP1 and the RNA-binding proteins Caprin-1, G3BP2a and splicing factor proline and glutamine rich, or PSF. The G3BP-complex binds preferentially to transcripts that retain introns, and to non-coding sequences like 3'-untranslated region and long non-coding RNAs. Specific transcripts with retained introns appear to be enriched in the cerebellum compared to the rest of the brain and G3BP1 depletion decreased this intron retention in the cerebellum of G3BP1 knockout mice. Among the enriched transcripts, we found an overrepresentation of genes involved in synaptic transmission, especially glutamate-related neuronal transmission. Notably, G3BP1 seems to repress the expression of the mature Grm5 (metabotropic glutamate receptor 5) transcript, by promoting the retention of an intron in the immature transcript in the cerebellum. Our results suggest that G3BP is involved in a new functional mechanism to regulate non-coding RNAs including intron-retaining transcripts, and thus have broad implications for neuronal gene regulation, where intron retention is widespread.
Collapse
Affiliation(s)
- Sophie Martin
- Institut de Génétique Moléculaire de Montpellier, CNRS UMR5535, Montpellier, France
| | - Nicolas Bellora
- Computational Genomics Group Universitat Pompeu Fabra PRBB, Barcelona, Spain.,Laboratorio de Microbiología Aplicada y Biotecnología, Instituto Andino-Patagónico de Tecnologías Biológicas y Geoambientales (IPATEC), CONICET - UNComahue, Bariloche, Argentina
| | | | - Manuel Irimia
- The Donnelly Centre, University of Toronto, Toronto, Ontario, Canada
| | - Karim Chebli
- Institut de Génétique Moléculaire de Montpellier, CNRS UMR5535, Montpellier, France
| | - Marion de Toledo
- Institut de Génétique Moléculaire de Montpellier, CNRS UMR5535, Montpellier, France
| | - Monika Raabe
- Max Planck Institute for Biophysical Chemistry, Göttingen, Germany
| | - Eduardo Eyras
- Computational Genomics Group Universitat Pompeu Fabra PRBB, Barcelona, Spain.,Catalan Institution for Research and Advanced Studies (ICREA), Passeig Lluís Companys 23, Barcelona, Spain
| | - Henning Urlaub
- Max Planck Institute for Biophysical Chemistry, Göttingen, Germany
| | - Ben J Blencowe
- The Donnelly Centre, University of Toronto, Toronto, Ontario, Canada
| | - Jamal Tazi
- Institut de Génétique Moléculaire de Montpellier, CNRS UMR5535, Montpellier, France.
| |
Collapse
|
7
|
Gadea G, Arsic N, Fernandes K, Diot A, Joruiz SM, Abdallah S, Meuray V, Vinot S, Anguille C, Remenyi J, Khoury MP, Quinlan PR, Purdie CA, Jordan LB, Fuller-Pace FV, de Toledo M, Cren M, Thompson AM, Bourdon JC, Roux P. TP53 drives invasion through expression of its Δ133p53β variant. eLife 2016; 5. [PMID: 27630122 PMCID: PMC5067115 DOI: 10.7554/elife.14734] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Accepted: 09/13/2016] [Indexed: 12/28/2022] Open
Abstract
TP53 is conventionally thought to prevent cancer formation and progression to metastasis, while mutant TP53 has transforming activities. However, in the clinic, TP53 mutation status does not accurately predict cancer progression. Here we report, based on clinical analysis corroborated with experimental data, that the p53 isoform Δ133p53β promotes cancer cell invasion, regardless of TP53 mutation status. Δ133p53β increases risk of cancer recurrence and death in breast cancer patients. Furthermore Δ133p53β is critical to define invasiveness in a panel of breast and colon cell lines, expressing WT or mutant TP53. Endogenous mutant Δ133p53β depletion prevents invasiveness without affecting mutant full-length p53 protein expression. Mechanistically WT and mutant Δ133p53β induces EMT. Our findings provide explanations to 2 long-lasting and important clinical conundrums: how WT TP53 can promote cancer cell invasion and reciprocally why mutant TP53 gene does not systematically induce cancer progression. DOI:http://dx.doi.org/10.7554/eLife.14734.001 Most cancers are caused by a build-up of mutations that are acquired throughout life. One gene in particular, called TP53, is the most commonly mutated gene in many types of human cancers. This suggests that TP53 mutations play an important role in cancer development. It is widely considered that the TP53 gene normally stops tumors from forming, while mutant forms of the gene somehow promote cancer growth. Evidence from patients with cancer has shown, however, that the relationship between TP53 mutations and cancer is not that simple. Some very aggressive cancers that resist treatment and spread have a normal TP53 gene. Some cancers with a mutated gene do not spread and respond well to cancer treatments. Recent studies have shown that the normal TP53 gene produces many different versions of its protein, and that some of these naturally occurring forms are found more often in tumors that others. However, it was not clear if certain versions of TP53’s proteins contributed to the development of cancer. Now, Gadea, Arsic, Fernandes et al. show that Δ133p53β, one version of the protein produced by the TP53 gene in human cells, helps tumor cells to spread to other organs. Tests of 273 tumors taken from patients with breast cancer revealed that tumors with the Δ133p53β protein were more likely to spread. Patients with these Δ133p53β-containing tumors were also more likely to develop secondary tumors at other sites in the body and to die within five years. Next, a series of experiments showed that removing Δ133p53β from breast cancer cells grown in the laboratory made them less likely to invade, while adding it back had the opposite effect. The same thing happened in colon cancer cells grown in the laboratory. The experiments showed that Δ133p53β causes tumor cells with the normal TP53 gene or a mutated TP53 gene to spread to other organs. Together the new findings help explain why some aggressive cancers develop even with a normal version of the tumor-suppressing TP53 gene. They also help explain why not all cancers with a mutant version of the TP53 gene go on to spread. Future studies will be needed to determine whether drugs that prevent the production of the Δ133p53β protein can help to treat aggressive cancers. DOI:http://dx.doi.org/10.7554/eLife.14734.002
Collapse
Affiliation(s)
- Gilles Gadea
- CRBM, CNRS, Centre de Recherche de Biologie cellulaire de Montpellier, Montpellier, France.,Université Montpellier, Montpellier, France
| | - Nikola Arsic
- CRBM, CNRS, Centre de Recherche de Biologie cellulaire de Montpellier, Montpellier, France.,Université Montpellier, Montpellier, France
| | - Kenneth Fernandes
- Division of Cancer Research, University of Dundee, Ninewells Hospital and Medical School, Dundee, United Kingdom
| | - Alexandra Diot
- Division of Cancer Research, University of Dundee, Ninewells Hospital and Medical School, Dundee, United Kingdom
| | - Sébastien M Joruiz
- Division of Cancer Research, University of Dundee, Ninewells Hospital and Medical School, Dundee, United Kingdom
| | - Samer Abdallah
- CRBM, CNRS, Centre de Recherche de Biologie cellulaire de Montpellier, Montpellier, France.,Université Montpellier, Montpellier, France
| | - Valerie Meuray
- Division of Cancer Research, University of Dundee, Ninewells Hospital and Medical School, Dundee, United Kingdom
| | - Stéphanie Vinot
- CRBM, CNRS, Centre de Recherche de Biologie cellulaire de Montpellier, Montpellier, France.,Université Montpellier, Montpellier, France
| | - Christelle Anguille
- CRBM, CNRS, Centre de Recherche de Biologie cellulaire de Montpellier, Montpellier, France.,Université Montpellier, Montpellier, France
| | - Judit Remenyi
- Division of Cancer Research, University of Dundee, Ninewells Hospital and Medical School, Dundee, United Kingdom
| | - Marie P Khoury
- Division of Cancer Research, University of Dundee, Ninewells Hospital and Medical School, Dundee, United Kingdom
| | - Philip R Quinlan
- Division of Cancer Research, University of Dundee, Ninewells Hospital and Medical School, Dundee, United Kingdom
| | - Colin A Purdie
- Division of Cancer Research, University of Dundee, Ninewells Hospital and Medical School, Dundee, United Kingdom
| | - Lee B Jordan
- Division of Cancer Research, University of Dundee, Ninewells Hospital and Medical School, Dundee, United Kingdom
| | - Frances V Fuller-Pace
- Division of Cancer Research, University of Dundee, Ninewells Hospital and Medical School, Dundee, United Kingdom
| | - Marion de Toledo
- Université Montpellier, Montpellier, France.,CNRS, Institut de Génétique Moléculaire de Montpellier, Montpellier, France
| | - Maïlys Cren
- Université Montpellier, Montpellier, France.,IRB, Institut de Recherche en Biothérapie, Montpellier, France
| | - Alastair M Thompson
- Division of Cancer Research, University of Dundee, Ninewells Hospital and Medical School, Dundee, United Kingdom.,Department of Surgical Oncology, MD Anderson Cancer Centre, Houston, United States
| | - Jean-Christophe Bourdon
- Division of Cancer Research, University of Dundee, Ninewells Hospital and Medical School, Dundee, United Kingdom
| | - Pierre Roux
- CRBM, CNRS, Centre de Recherche de Biologie cellulaire de Montpellier, Montpellier, France.,Université Montpellier, Montpellier, France
| |
Collapse
|
8
|
Lopez-Mejia IC, de Toledo M, Chavey C, Lapasset L, Cavelier P, Lopez-Herrera C, Chebli K, Fort P, Beranger G, Fajas L, Amri EZ, Casas F, Tazi J. Antagonistic functions of LMNA isoforms in energy expenditure and lifespan. EMBO Rep 2014; 15:529-39. [PMID: 24639560 DOI: 10.1002/embr.201338126] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Alternative RNA processing of LMNA pre-mRNA produces three main protein isoforms, that is, lamin A, progerin, and lamin C. De novo mutations that favor the expression of progerin over lamin A lead to Hutchinson-Gilford progeria syndrome (HGPS), providing support for the involvement of LMNA processing in pathological aging. Lamin C expression is mutually exclusive with the splicing of lamin A and progerin isoforms and occurs by alternative polyadenylation. Here, we investigate the function of lamin C in aging and metabolism using mice that express only this isoform. Intriguingly, these mice live longer, have decreased energy metabolism, increased weight gain, and reduced respiration. In contrast, progerin-expressing mice show increased energy metabolism and are lipodystrophic. Increased mitochondrial biogenesis is found in adipose tissue from HGPS-like mice, whereas lamin C-only mice have fewer mitochondria. Consistently, transcriptome analyses of adipose tissues from HGPS and lamin C-only mice reveal inversely correlated expression of key regulators of energy expenditure, including Pgc1a and Sfrp5. Our results demonstrate that LMNA encodes functionally distinct isoforms that have opposing effects on energy metabolism and lifespan in mammals.
Collapse
Affiliation(s)
- Isabel C Lopez-Mejia
- Institut de Génétique Moléculaire de Montpellier CNRS UMR 5535 Universities of Montpellier 1 and Montpellier 2, Montpellier, France
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
9
|
de Toledo M, Anguille C, Roger L, Roux P, Gadea G. Cooperative anti-invasive effect of Cdc42/Rac1 activation and ROCK inhibition in SW620 colorectal cancer cells with elevated blebbing activity. PLoS One 2012; 7:e48344. [PMID: 23144867 PMCID: PMC3492328 DOI: 10.1371/journal.pone.0048344] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2012] [Accepted: 09/24/2012] [Indexed: 12/18/2022] Open
Abstract
Rho GTPases are key regulators of tumour cell invasion and therefore constitute attractive targets for the design of anticancer agents. Several strategies have been developed to modulate their increased activities during cancer progression. Interestingly, none of these approaches took into account the existence of the well-known antagonistic relationship between RhoA and Rac1. In this study, we first compared the invasiveness of a collection of colorectal cancer cell lines with their RhoA, Rac1 and Cdc42 activities. A marked decrease of active Cdc42 and Rac1 correlated with the high invasive potential of the cell lines established from metastatic sites of colorectal adenocarcinoma (LoVo, SKCo1, SW620 and CoLo205). Conversely, no correlation between RhoA activity and invasiveness was detected, whereas the activity of its kinase effector ROCK was higher in cancer cell lines with a more invasive phenotype. In addition, invasiveness in these colon cancer cell lines was correlated with a typical round and blebbing morphology. We then tested whether treatment with PDGF to restore Cdc42 and Rac1 activities and/or with Y27632, a chemical inhibitor of ROCK, could decrease the invasiveness of SW620 cells. The association of both treatments substantially decreased the invasive potential of SW620 cells and this effect was accompanied by loss of membrane blebbing, restoration of a more elongated cell morphology and re-establishment of E-cadherin-dependent adherens junctions. This study paves the road to the development of therapeutic strategies in which different Rho GTPase modulators are combined to modulate the cross-talk between Rho GTPases and their specific input in metastatic progression.
Collapse
Affiliation(s)
- Marion de Toledo
- Institut de Génétique Moléculaire de Montpellier, Centre national de la recherche scientifique UMR 5535, Montpellier, France
| | - Christelle Anguille
- Centre de Recherche en Biochimie Macromoléculaire, Centre national de la recherche scientifique UMR 5237, Montpellier, France
| | - Laureline Roger
- Institute of Cancer and Genetics, Cardiff University School of Medicine, Cardiff, United Kingdom
| | - Pierre Roux
- Centre de Recherche en Biochimie Macromoléculaire, Centre national de la recherche scientifique UMR 5237, Montpellier, France
| | - Gilles Gadea
- Centre de Recherche en Biochimie Macromoléculaire, Centre national de la recherche scientifique UMR 5237, Montpellier, France
- * E-mail:
| |
Collapse
|
10
|
Abstract
In addition to its role in controlling cell cycle progression, the tumor suppressor protein p53 can also affect other cellular functions such as cell migration. In this study, we show that p53 deficiency in mouse embryonic fibroblasts cultured in three-dimensional matrices induces a switch from an elongated spindle morphology to a markedly spherical and flexible one associated with highly dynamic membrane blebs. These rounded, motile cells exhibit amoeboid-like movement and have considerably increased invasive properties. The morphological transition requires the RhoA–ROCK (Rho-associated coil-containing protein kinase) pathway and is prevented by RhoE. A similar p53-mediated transition is observed in melanoma A375P cancer cells. Our data suggest that genetic alterations of p53 in tumors are sufficient to promote motility and invasion, thereby contributing to metastasis.
Collapse
Affiliation(s)
- Gilles Gadea
- Centre de Recherche en Biochimie Macromoléculaire, Centre National de la Recherche Scientifique, Universite Mixte de Recherche 5237, Institut Federatif de Recherche 122, F-34293 Montpellier, Cedex 5, France
| | | | | | | |
Collapse
|
11
|
Gadea G, Roger L, Anguille C, de Toledo M, Gire V, Roux P. TNFalpha induces sequential activation of Cdc42- and p38/p53-dependent pathways that antagonistically regulate filopodia formation. J Cell Sci 2004; 117:6355-64. [PMID: 15561766 DOI: 10.1242/jcs.01566] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Cell migration is an essential function in various physiological processes, including tissue repair and tumour invasion. Repair of tissue damage requires the recruitment of fibroblasts to sites of tissue injury, which is mediated in part by the cytokine tumour necrosis factor alpha (TNFalpha). As dynamic rearrangements of actin cytoskeleton control cell locomotion, this implicates that TNFalpha is a potent coordinator of cellular actin changes. We have investigated the role of TNFalpha in regulating the cortical actin-containing structures essential for cell locomotion called filopodia. Kinetic analysis of TNFalpha-treated mouse embryonic fibroblasts (MEFs) revealed a dual effect on filopodia formation: a rapid and transient induction mediated by Cdc42 GTPase that is then counteracted by a subsequent sustained inhibition requiring activation of the mitogen-activated protein kinase p38 but not Cdc42 activity. This inhibition also involves the tumour suppressor p53, given that it is activated in response to TNFalpha following the same time course as the decrease of filopodia formation. This functional activation of p53, measured by transcription induction of its target p21WAF1(p21), is also associated with p38 kinase-dependent phosphorylation of p53 at serine 18. Furthermore, TNFalpha did not inhibit filopodia formation in MEFs treated with the transcription inhibitor actinomycin D, in p53-deficient MEFs, or MEFs expressing p53 mutants H273 or H175, which supports a role for the transcriptional activity of p53 in mediating TNFalpha-dependent filopodia inhibition. Our data delineate a novel inhibitory pathway in which TNFalpha prevents filopodia formation and cell migration through the activation of the mitogen-activated protein kinase (MAPK) p38, which in turn activates p53. This shows that TNFalpha on its own initiates antagonistic signals that modulate events linked to cell migration.
Collapse
Affiliation(s)
- Gilles Gadea
- Centre de Recherche en Biochimie Macromoléculaire, CNRS FRE 2593, IFR 24, 1919 route de Mende, 34293 Montpellier CEDEX 5, France
| | | | | | | | | | | |
Collapse
|
12
|
de Toledo M, Senic-Matuglia F, Salamero J, Uze G, Comunale F, Fort P, Blangy A. The GTP/GDP cycling of rho GTPase TCL is an essential regulator of the early endocytic pathway. Mol Biol Cell 2003; 14:4846-56. [PMID: 12960428 PMCID: PMC284789 DOI: 10.1091/mbc.e03-04-0254] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Rho GTPases are key regulators of actin dynamics. We report that the Rho GTPase TCL, which is closely related to Cdc42 and TC10, localizes to the plasma membrane and the early/sorting endosomes in HeLa cells, suggesting a role in the early endocytic pathway. Receptor-dependent internalization of transferrin (Tf) is unaffected by suppression of endogenous TCL by small interfering RNA treatment. However, Tf accumulates in Rab5-positive uncoated endocytic vesicles and fails to reach the early endosome antigen-1-positive early endosomal compartments and the pericentriolar recycling endosomes. Moreover, Tf release upon TCL knockdown is significantly slower. Conversely, in the presence of dominant active TCL, internalized Tf accumulates in early endosome antigen-1-positive early/sorting endosomes and not in perinuclear recycling endosomes. Tf recycles directly from the early/sorting endosomes and it is normally released by the cells. The same phenotype is generated by replacing the C terminus of dominant active Cdc42 and TC10 with that of TCL, indicating that all three proteins share downstream effector proteins. Thus, TCL is essential for clathrin-dependent endocytosed receptors to enter the early/sorting endosomes. Furthermore, the active GTPase favors direct recycling from early/sorting endosomes without accumulating in the perinuclear recycling endosomes.
Collapse
Affiliation(s)
- Marion de Toledo
- Centre de Recherches en Biochimie Macromoléculaire, Centre National de la Recherche Scientifique Unité Propre de Recherche 1086, 34293 Montpellier, France
| | | | | | | | | | | | | |
Collapse
|