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Aguilera C, Fernández-Majada V, Inglés-Esteve J, Rodilla V, Bigas A, Espinosa L. Efficient nuclear export of p65-IκBα complexes requires 14-3-3 proteins. J Cell Sci 2016; 129:2472. [PMID: 27307493 DOI: 10.1242/jcs.192641] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Gekas C, D'Altri T, Aligué R, González J, Espinosa L, Bigas A. β-Catenin is required for T-cell leukemia initiation and MYC transcription downstream of Notch1. Leukemia 2016; 30:2002-2010. [PMID: 27125305 DOI: 10.1038/leu.2016.106] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Revised: 04/13/2016] [Accepted: 04/18/2016] [Indexed: 12/30/2022]
Abstract
Notch activation is instrumental in the development of most T-cell acute lymphoblastic leukemia (T-ALL) cases, yet Notch mutations alone are not sufficient to recapitulate the full human disease in animal models. We here found that Notch1 activation at the fetal liver (FL) stage expanded the hematopoietic progenitor population and conferred it transplantable leukemic-initiating capacity. However, leukemogenesis and leukemic-initiating cell capacity induced by Notch1 was critically dependent on the levels of β-Catenin in both FL and adult bone marrow contexts. In addition, inhibition of β-Catenin compromised survival and proliferation of human T-ALL cell lines carrying activated Notch1. By transcriptome analyses, we identified the MYC pathway as a crucial element downstream of β-Catenin in these T-ALL cells and demonstrate that the MYC 3' enhancer required β-Catenin and Notch1 recruitment to induce transcription. Finally, PKF115-584 treatment prevented and partially reverted leukemogenesis induced by active Notch1.
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Espinosa L. Endosomal acidification inhibitors for the treatment of BRAF mutant tumors. Mol Cell Oncol 2016; 3:e1062073. [PMID: 27308590 PMCID: PMC4905373 DOI: 10.1080/23723556.2015.1062073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2015] [Revised: 06/09/2015] [Accepted: 06/10/2015] [Indexed: 06/06/2023]
Abstract
Mutations in KRAS and BRAF genes are commonly found in several types of cancer associated with poor prognosis and therapy resistance. We have identified phosphorylated p45-IKKα as an essential mediator of BRAF-induced tumorigenesis. Importantly, endosomal acidification inhibitors preclude phosphorylation of p45-IKKα and abolish the metastatic capacity of BRAF mutant cancer cells.
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Espinosa L, Fortea A, Oriolo G, Balcells M, Oliveras C. Suicide attempt in alcohol use disorder and Wernicke encephalopathy: A case report. Eur Psychiatry 2016. [DOI: 10.1016/j.eurpsy.2016.01.2236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
Abstract
BackgroundThe relation between alcohol dependence and suicidal behavior is well known and alcohol consumption is a risk factor to take in consideration in order to prevent suicidal attempts. Wernicke encephalopathy (WE) is a common acute neurological disorder caused by thiamine deficiency frequently associated with alcohol use disorder and often infra-diagnosed. Just few cases are reported about the possible correlation between suicidal behaviour and Wernicke encephalopathy.ObjectiveTo describe the possible association between suicidal attempts and Wernicke encephalopathy.MethodsWe report the case of a 57 year old man, with past diagnosis of disthymia and amphetamine abuse disorder, and a history of bariatric surgery, who was hospitalized in the intensive care unit (ICU) of hospital clinic for a suicidal attempt by mean of metro railway precipitation. He presented two episodes of psychomotor agitation in the context of an abstinence syndrome that reverted with midazolam continuous perfusion and clonazepam 8 mg per day. Consequently to medical improvement, he was moved to Psychiatry Unit of Addictive Behavior and finally diagnosed with alcohol use disorder.ResultsIn the physical exam, bilateral nystagmus and cerebellar ataxia were observed. Signs of malnutrition were detected in the blood analysis. In a brain magnetic resonance image, volume deficits in the mammillary bodies, thalamus, cortex and corpus callosum, as well as peri-aqueductal altered signal were observed, all signs compatible with Wernicke encephalopathy diagnoses.ConclusionsWernicke encephalopathy is a frequent concomitant condition in patients with alcohol use disorder. The consequent cognitive decline could represent an independent added risk factor for suicidal behavior.Disclosure of interestThe authors have not supplied their declaration of competing interest.
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Ruiz-Ortiz E, Gonzalez-Roca E, Mensa-Vilaro A, Rius J, Plaza S, Anton C, Calvo I, Modesto C, Anton J, Arnal C, Alvarez C, Alvarez-Coca J, Becerra E, Bilbao N, Camacho M, Crespo J, de Diego C, Diez-Garcia LF, Espinosa L, Garcia-Escriva D, de Gracia F, Gonzalez MI, Iglesias E, Izquierdo S, Lastra B, Llobet P, Lopez B, Lopez-Gonzalez V, Martinez R, Martin-Mateos MA, Merino R, Ortega L, Peiro ME, de Soto IP, Perez-Mendez C, Rodriguez-Valverde V, Ribes A, Ruiz A, Sanchez B, Santos JL, Sevilla B, Sotoca J, Vilas J, Villoria A, Yagüe J, Arostegui JI. Clinical and genetic features of Spanish patients with Mevalonate kinase deficiency. Pediatr Rheumatol Online J 2015. [PMCID: PMC4597073 DOI: 10.1186/1546-0096-13-s1-p36] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Semenza JC, Lindgren E, Espinosa L, Svendotter M, Penttinen P, Rocklöv J. Determinants and Drivers of Infectious Disease Threats in Europe. Eur J Public Health 2015. [DOI: 10.1093/eurpub/ckv167.037] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Semenza JC, Tran A, Espinosa L, Sudre B, Domanovic D, Paz S. Climate Change Projections of West Nile Virus Infections: Implications for Blood Safety Practices. Eur J Public Health 2015. [DOI: 10.1093/eurpub/ckv168.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Margalef P, Colomer C, Villanueva A, Montagut C, Iglesias M, Bellosillo B, Salazar R, Martínez-Iniesta M, Bigas A, Espinosa L. BRAF-induced tumorigenesis is IKKα-dependent but NF-κB-independent. Sci Signal 2015; 8:ra38. [PMID: 25900832 DOI: 10.1126/scisignal.2005886] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
KRAS mutations contribute to cell proliferation and survival in numerous cancers, including colorectal cancers (CRC). One pathway through which mutant KRAS acts is an inflammatory pathway that involves the kinase IKK and activates the transcription factor NF-κB. BRAF, a kinase that is downstream of KRAS, is mutated in a subset of CRC and is predictive of poor prognosis and therapeutic resistance. We found that, in contrast to mutant KRAS, mutant BRAF (BRAF(V600E)) did not trigger NF-κB activation but instead triggered the phosphorylation of a proteolytic fragment of IKKα (p45-IKKα) in CRC cells. BRAF(V600E) CRC cells had a high abundance of phosphorylated p45-IKKα, which was decreased by a RAF inhibitor. However, the abundance and DNA binding of NF-κB in these cells were unaffected by the RAF inhibitor, and expression of BRAF(V600E) in human embryonic kidney-293T cells did not activate an NF-κB reporter. Moreover, BRAF-induced transformation of NIH-3T3 cells and BRAF-dependent transcription required phosphorylation of p45-IKKα. The kinase TAK1, which was associated with the endosomal compartment, phosphorylated p45-IKKα. Inhibition of endosomal vacuolar adenosine triphosphatase (V-ATPase) with chloroquine or bafilomycin A1 blocked p45-IKKα phosphorylation and induced apoptosis in BRAF-mutant CRC cells independent of autophagy. Treating mice with V-ATPase inhibitors reduced the growth and metastasis of BRAF(V600E) xenograft tumors in the cecum of mice.
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Gallardo F, Padrón A, Garcia-Carbonell R, Rius C, González-Perez A, Arumí-Uria M, Iglesias M, Nonell L, Bellosillo B, Segura S, Pujol RM, Lopez-Bigas N, Bertran J, Bigas A, Espinosa L. Cytoplasmic accumulation of NCoR in malignant melanoma: consequences of altered gene repression and prognostic significance. Oncotarget 2015; 6:9284-94. [PMID: 25823659 PMCID: PMC4496217 DOI: 10.18632/oncotarget.3252] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Accepted: 01/31/2015] [Indexed: 11/25/2022] Open
Abstract
Invasive malignant melanoma (MM) is an aggressive tumor with no curative therapy available in advanced stages. Nuclear corepressor (NCoR) is an essential regulator of gene transcription, and its function has been found deregulated in different types of cancer. In colorectal cancer cells, loss of nuclear NCoR is induced by Inhibitor of kappa B kinase (IKK) through the phosphorylation of specific serine residues. We here investigate whether NCoR function impacts in MM, which might have important diagnostic and prognostic significance. By IHC, we here determined the subcellular distribution of NCoR in a cohort of 63 primary invasive MM samples, and analyzed its possible correlation with specific clinical parameters. We therefore used a microarray-based strategy to determine global gene expression differences in samples with similar tumor stage, which differ in the presence of cytoplasmic or nuclear NCoR. We found that loss of nuclear NCoR results in upregulation of a specific cancer-related genetic signature, and is significantly associated with MM progression. Inhibition of IKK activity in melanoma cells reverts NCoR nuclear distribution and specific NCoR-regulated gene transcription. Analysis of public database demonstrated that inactivating NCoR mutations are highly prevalent in MM, showing features of driver oncogene.
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Martínez N, Martorell C, Espinosa L, Marasigan V, Domènech S, Inzitari M. Impact of Qigong on quality of life, pain and depressive symptoms in older adults admitted to an intermediate care rehabilitation unit: a randomized controlled trial. Aging Clin Exp Res 2015; 27:125-30. [PMID: 24927783 DOI: 10.1007/s40520-014-0250-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2014] [Accepted: 05/22/2014] [Indexed: 10/25/2022]
Abstract
BACKGROUND AND AIMS Qigong has been used as a complementary therapy to improve different health-related problems. This study aims to test the effects of Qigong on quality of life, pain and depressive symptoms in older hospitalized patients. METHODS In this randomized controlled single blind study, we randomized 58 ≥50 years adults admitted to a post-acute intermediate care rehabilitation facility, to receive a 90 min, bi-weekly, 4-week structured Qigong intervention plus usual care and rehabilitation (N = 29) or usual care and rehabilitation alone (N = 29). Outcomes included quality of life (0-100 points visual analogical scale), pain (0-10 points scale), and depressive symptoms (5-item modified Yesavage Geriatric Depression Scale). We also evaluated participants' compliance and safety. RESULTS Of the enrolled 58 participants (mean age ± SD = 74.3 ± 8.2 years, 88 % women) we dropped-out four in the control group. No statistically significant differences in baseline characteristics were shown between groups, including age, gender, marital status, education, comorbidity and functional status, main diagnostic at admission and number of rehabilitation sessions. In an intention-to-treat analysis (repeated measures ANOVA) the intervention group experienced a significant improvement in quality of life (mean increase of 19 points vs 2.6 points for controls, p = 0.002). Pain and depressive symptoms improved in both groups. Adherence was good (79 % of participants completed the whole program). No adverse events were reported. CONCLUSIONS According to our results, a structured Qigong intervention, together with usual care, might contribute to improve quality of life of patients admitted to a post-acute intermediate care rehabilitation unit, compared to usual care.
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López-Arribillaga E, Rodilla V, Pellegrinet L, Guiu J, Iglesias M, Roman AC, Gutarra S, González S, Muñoz-Cánoves P, Fernández-Salguero P, Radtke F, Bigas A, Espinosa L. Bmi1 regulates murine intestinal stem cell proliferation and self-renewal downstream of Notch. Development 2014; 142:41-50. [PMID: 25480918 DOI: 10.1242/dev.107714] [Citation(s) in RCA: 74] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Genetic data indicate that abrogation of Notch-Rbpj or Wnt-β-catenin pathways results in the loss of the intestinal stem cells (ISCs). However, whether the effect of Notch is direct or due to the aberrant differentiation of the transit-amplifying cells into post-mitotic goblet cells is unknown. To address this issue, we have generated composite tamoxifen-inducible intestine-specific genetic mouse models and analyzed the expression of intestinal differentiation markers. Importantly, we found that activation of β-catenin partially rescues the differentiation phenotype of Rbpj deletion mutants, but not the loss of the ISC compartment. Moreover, we identified Bmi1, which is expressed in the ISC and progenitor compartments, as a gene that is co-regulated by Notch and β-catenin. Loss of Bmi1 resulted in reduced proliferation in the ISC compartment accompanied by p16(INK4a) and p19(ARF) (splice variants of Cdkn2a) accumulation, and increased differentiation to the post-mitotic goblet cell lineage that partially mimics Notch loss-of-function defects. Finally, we provide evidence that Bmi1 contributes to ISC self-renewal.
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Espinosa L, Bigas A, Mulero MC. Novel functions of chromatin-bound IκBα in oncogenic transformation. Br J Cancer 2014; 111:1688-92. [PMID: 25233399 PMCID: PMC4453743 DOI: 10.1038/bjc.2014.84] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2013] [Revised: 11/19/2013] [Accepted: 01/24/2014] [Indexed: 01/30/2023] Open
Abstract
The nuclear factor-κB (NF-κB) signalling pathway participates in a multitude of biological processes, which imply the requirement of a complex and precise regulation. IκB (for Inhibitor of kappaB) proteins, which bind and retain NF-κB dimers in the cytoplasm, are the main contributors to negative regulation of NF-κB under non-stimulation conditions. Nevertheless, increasing evidences indicate that IκB proteins exert specific nuclear roles that directly contribute to the control of gene transcription. In particular, hypophosphorylated IκBβ can bind the promoter region of TNFα leading to persistent gene transcription in macrophages and contributing to the regulation of the inflammatory response. Recently, we demonstrated that phosphorylated and SUMOylated IκBα reside in the nucleus of the cells where it binds to chromatin leading to specific transcriptional repression. Mechanistically, IκBα associates and regulates Polycomb Repressor Complex activity, a function that is evolutionary conserved from flies to mammals, as indicate the homeotic phenotype of Drosophila mutants. Here we discuss the implications of chromatin-bound IκBα function in the context of tumorigenesis.
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Espinosa L, Margalef P, Bigas A. Non-conventional functions for NF-κB members: the dark side of NF-κB. Oncogene 2014; 34:2279-87. [DOI: 10.1038/onc.2014.188] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2014] [Revised: 05/19/2014] [Accepted: 05/23/2014] [Indexed: 02/07/2023]
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Alaña L, Sesé M, Cánovas V, Punyal Y, Fernández Y, Abasolo I, de Torres I, Ruiz C, Espinosa L, Bigas A, Y Cajal SR, Fernández PL, Serras F, Corominas M, Thomson TM, Paciucci R. Prostate tumor OVerexpressed-1 (PTOV1) down-regulates HES1 and HEY1 notch targets genes and promotes prostate cancer progression. Mol Cancer 2014; 13:74. [PMID: 24684754 PMCID: PMC4021398 DOI: 10.1186/1476-4598-13-74] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2013] [Accepted: 02/20/2014] [Indexed: 01/13/2023] Open
Abstract
BACKGROUND PTOV1 is an adaptor protein with functions in diverse processes, including gene transcription and protein translation, whose overexpression is associated with a higher proliferation index and tumor grade in prostate cancer (PC) and other neoplasms. Here we report its interaction with the Notch pathway and its involvement in PC progression. METHODS Stable PTOV1 knockdown or overexpression were performed by lentiviral transduction. Protein interactions were analyzed by co-immunoprecipitation, pull-down and/or immunofluorescence. Endogenous gene expression was analyzed by real time RT-PCR and/or Western blotting. Exogenous promoter activities were studied by luciferase assays. Gene promoter interactions were analyzed by chromatin immunoprecipitation assays (ChIP). In vivo studies were performed in the Drosophila melanogaster wing, the SCID-Beige mouse model, and human prostate cancer tissues and metastasis. The Excel package was used for statistical analysis. RESULTS Knockdown of PTOV1 in prostate epithelial cells and HaCaT skin keratinocytes caused the upregulation, and overexpression of PTOV1 the downregulation, of the Notch target genes HEY1 and HES1, suggesting that PTOV1 counteracts Notch signaling. Under conditions of inactive Notch signaling, endogenous PTOV1 associated with the HEY1 and HES1 promoters, together with components of the Notch repressor complex. Conversely, expression of active Notch1 provoked the dismissal of PTOV1 from these promoters. The antagonist role of PTOV1 on Notch activity was corroborated in the Drosophila melanogaster wing, where human PTOV1 exacerbated Notch deletion mutant phenotypes and suppressed the effects of constitutively active Notch. PTOV1 was required for optimal in vitro invasiveness and anchorage-independent growth of PC-3 cells, activities counteracted by Notch, and for their efficient growth and metastatic spread in vivo. In prostate tumors, the overexpression of PTOV1 was associated with decreased expression of HEY1 and HES1, and this correlation was significant in metastatic lesions. CONCLUSIONS High levels of the adaptor protein PTOV1 counteract the transcriptional activity of Notch. Our evidences link the pro-oncogenic and pro-metastatic effects of PTOV1 in prostate cancer to its inhibitory activity on Notch signaling and are supportive of a tumor suppressor role of Notch in prostate cancer progression.
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Lopez Pereira P, Martinez Urrutia MJ, Espinosa L, Jaureguizar E. Long-term consequences of posterior urethral valves. J Pediatr Urol 2013; 9:590-6. [PMID: 23871421 DOI: 10.1016/j.jpurol.2013.06.007] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2013] [Accepted: 06/15/2013] [Indexed: 11/29/2022]
Abstract
Posterior urethral valves (PUV) are the most common congenital cause of bladder outlet obstruction in infancy, and it is the effect of this obstruction on the bladder and the kidneys that will decide a patient's prognosis. With the improvements in diagnosis and treatments, what was previously a poor prognosis for boys with PUV has improved, and more patients will encounter the long-term sequelae of PUV during puberty and adulthood. In these patients the long-term prognosis in terms of renal and bladder function and fertility, as well as the risk of malignancy in those whose bladders were augmented with gastrointestinal segments, is still a matter of great concern and all of these topics will be discussed in this article.
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Mulero MC, Ferres-Marco D, Islam A, Margalef P, Pecoraro M, Toll A, Drechsel N, Charneco C, Davis S, Bellora N, Gallardo F, López-Arribillaga E, Asensio-Juan E, Rodilla V, González J, Iglesias M, Shih V, Albà MM, Di Croce L, Hoffmann A, Miyamoto S, Villà-Freixa J, López-Bigas N, Keyes WM, Domínguez M, Bigas A, Espinosa L. Chromatin-bound IκBα regulates a subset of polycomb target genes in differentiation and cancer. Cancer Cell 2013; 24:151-66. [PMID: 23850221 PMCID: PMC3962677 DOI: 10.1016/j.ccr.2013.06.003] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/10/2012] [Revised: 02/28/2013] [Accepted: 06/05/2013] [Indexed: 01/25/2023]
Abstract
IκB proteins are the primary inhibitors of NF-κB. Here, we demonstrate that sumoylated and phosphorylated IκBα accumulates in the nucleus of keratinocytes and interacts with histones H2A and H4 at the regulatory region of HOX and IRX genes. Chromatin-bound IκBα modulates Polycomb recruitment and imparts their competence to be activated by TNFα. Mutations in the Drosophila IκBα gene cactus enhance the homeotic phenotype of Polycomb mutants, which is not counteracted by mutations in dorsal/NF-κB. Oncogenic transformation of keratinocytes results in cytoplasmic IκBα translocation associated with a massive activation of Hox. Accumulation of cytoplasmic IκBα was found in squamous cell carcinoma (SCC) associated with IKK activation and HOX upregulation.
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Almeida-Paulo G, Lubomirov R, Alonso-Sanchez N, Espinosa L, Carcas A. PP132—Contribution of genetic (CYP3A5, ABCB1 and POR) and non-genetic variables to the oral tacrolimus clearance in children’s with stable kidney transplant, during advagraf® treatment. Clin Ther 2013. [DOI: 10.1016/j.clinthera.2013.07.154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Del Pozo Prieto D, Vélez MD, Espinosa L, González de Canales P, Moral I, Villafruela M. Gastric neuroendocrine tumor with extensive ossification. Endoscopy 2012; 44 Suppl 2 UCTN:E271-2. [PMID: 22814916 DOI: 10.1055/s-0032-1309715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
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Inglés-Esteve J, Morales M, Dalmases A, Garcia-Carbonell R, Jené-Sanz A, López-Bigas N, Iglesias M, Ruiz-Herguido C, Rovira A, Rojo F, Albanell J, Gomis RR, Bigas A, Espinosa L. Inhibition of specific NF-κB activity contributes to the tumor suppressor function of 14-3-3σ in breast cancer. PLoS One 2012; 7:e38347. [PMID: 22675457 PMCID: PMC3364992 DOI: 10.1371/journal.pone.0038347] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2012] [Accepted: 05/03/2012] [Indexed: 01/08/2023] Open
Abstract
14-3-3σ is frequently lost in human breast cancers by genetic deletion or promoter methylation. We have now investigated the involvement of 14-3-3σ in the termination of NF-κB signal in mammary cells and its putative role in cancer relapse and metastasis. Our results show that 14-3-3σ regulates nuclear export of p65-NF-κB following chronic TNFα stimulation. Restoration of 14-3-3σ in breast cancer cells reduces migration capacity and metastatic abilities in vivo. By microarray analysis, we have identified a genetic signature that responds to TNFα in a 14-3-3σ-dependent manner and significantly associates with different breast and other types of cancer. By interrogating public databases, we have found that over-expression of this signature correlates with poor relapse-free survival in breast cancer patients. Finally, screening of 96 human breast tumors showed that NF-κB activation strictly correlates with the absence of 14-3-3σ and it is significantly associated with worse prognosis in the multivariate analysis. Our findings identify a genetic signature that is important for breast cancer prognosis and for future personalized treatments based on NF-κB targeting.
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Rodriguez Leal F, De La Maza M, Espinosa L, Martinez H, Delgado P, Martinez-Ramirez D, Femat G, Cantu-Martinez L. Stroke in Young Adults: 6 Year Experience in Hospital San Jose, Monterrey, Mexico (P04.053). Neurology 2012. [DOI: 10.1212/wnl.78.1_meetingabstracts.p04.053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Pippa R, Espinosa L, Gundem G, García-Escudero R, Dominguez A, Orlando S, Gallastegui E, Saiz C, Besson A, Pujol MJ, López-Bigas N, Paramio JM, Bigas A, Bachs O. p27Kip1 represses transcription by direct interaction with p130/E2F4 at the promoters of target genes. Oncogene 2011; 31:4207-20. [DOI: 10.1038/onc.2011.582] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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Schlüter A, Espinosa L, Fourcade S, Galino J, López E, Ilieva E, Morató L, Asheuer M, Cook T, McLaren A, Reid J, Kelly F, Bates S, Aubourg P, Galea E, Pujol A. Functional genomic analysis unravels a metabolic-inflammatory interplay in adrenoleukodystrophy. Hum Mol Genet 2011; 21:1062-77. [PMID: 22095690 PMCID: PMC3277307 DOI: 10.1093/hmg/ddr536] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
X-linked adrenoleukodystrophy (X-ALD) is an inherited disorder characterized by axonopathy and demyelination in the central nervous system and adrenal insufficiency. Main X-ALD phenotypes are: (i) an adult adrenomyeloneuropathy (AMN) with axonopathy in spinal cords, (ii) cerebral AMN with brain demyelination (cAMN) and (iii) a childhood variant, cALD, characterized by severe cerebral demyelination. Loss of function of the ABCD1 peroxisomal fatty acid transporter and subsequent accumulation of very-long-chain fatty acids (VLCFAs) are the common culprits to all forms of X-ALD, an aberrant microglial activation accounts for the cerebral forms, whereas inflammation allegedly plays no role in AMN. How VLCFA accumulation leads to neurodegeneration and what factors account for the dissimilar clinical outcomes and prognosis of X-ALD variants remain elusive. To gain insights into these questions, we undertook a transcriptomic approach followed by a functional-enrichment analysis in spinal cords of the animal model of AMN, the Abcd1− null mice, and in normal-appearing white matter of cAMN and cALD patients. We report that the mouse model shares with cAMN and cALD a common signature comprising dysregulation of oxidative phosphorylation, adipocytokine and insulin signaling pathways, and protein synthesis. Functional validation by quantitative polymerase chain reaction, western blots and assays in spinal cord organotypic cultures confirmed the interplay of these pathways through IkB kinase, being VLCFA in excess a causal, upstream trigger promoting the altered signature. We conclude that X-ALD is, in all its variants, a metabolic/inflammatory syndrome, which may offer new targets in X-ALD therapeutics.
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van Stralen K, Krischock L, Schaefer F, Verrina E, Groothoff J, Jager K, Tizard J, Harambat J, van Stralen KJ, Espinosa L, Groothoff JW, Hulton SA, Jankauskiene A, Schaefer F, Verrina E, Jager KJ, Cochat P, Ruggiero B, Gianviti A, Benetti E, Peruzzi L, Barbano GC, Corona F, Ventura G, Pecoraro C, Murer L, Ghiggeri GM, Pennesi M, Edefonti A, Coppo R, Emma F, Bonthuis M, van Stralen KJ, Verrina E, Edefonti A, Jager KJ, Schaefer F, Musumeci A, Graziano U, Nuzzi F, Ferraiuolo S, Severino G, Malgieri G, Minale B, Pecoraro C. Pediatric nephrology. Clin Kidney J 2011. [DOI: 10.1093/ndtplus/4.s2.6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Espinosa L, Bigas A, Mulero MC. Alternative nuclear functions for NF-κB family members. Am J Cancer Res 2011; 1:446-59. [PMID: 21984965 PMCID: PMC3186045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2011] [Accepted: 02/10/2011] [Indexed: 05/31/2023] Open
Abstract
The NF-κB signalling pathway regulates many different biological processes from the cellular level to the whole organism. The majority of these functions are completely dependent on the activation of the cytoplasmic IKK kinase complex that leads to IκB degradation and results in the nuclear translocation of specific NF-κB dimers, which, in general, act as transcription factors. Although this is a well-established mechanism of action, several publications have now demonstrated that some members of this pathway display additional functions in the nucleus as regulators of NF-κB-dependent and independent gene expression. In this review, we compiled and put in context most of the data concerning specific nuclear roles for IKK and IκB proteins.
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López Pereira P, Moreno Valle JA, Espinosa L, Alonso Dorrego JM, Martínez Urrutia MJ, Lobato Romera R, Jaureguízar Monereo E. Are urodynamic studies really needed during bladder augmentation follow-up? J Pediatr Urol 2009; 5:30-3. [PMID: 18774747 DOI: 10.1016/j.jpurol.2008.07.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/09/2008] [Accepted: 07/14/2008] [Indexed: 11/30/2022]
Abstract
OBJECTIVE We assessed clinical and urodynamic outcomes, over a minimum 10-year follow-up period, of neuropathic bladder patients treated with a bladder augmentation (BA) to determine if periodic urodynamic studies are needed. MATERIAL AND METHODS Thirty-two patients with poorly compliant bladders underwent BA at a mean age of 11 years (2.5-18). Mean follow-up was 12 years (10-14.5) and mean patient age at the end of the study was 22 years (12.2-33). During follow-up all patients were controlled at regular intervals with urinary tract imaging, serum electrolyte and creatinine levels, cystoscopy and urodynamic studies. Preoperative, 1-year post-BA and latest urodynamic studies results were compared. RESULTS Urodynamic studies at 1-year post-BA showed a significant increase in bladder capacity and a decrease in end-filling detrusor pressure compared with preoperative values (396 vs 106 ml; 10 vs 50 cm H(2)O, P<0.0001). The increase in bladder capacity was more significant at the end of the study than after 1 year (507.8 vs 396 ml, P<0.002). Thirteen patients had phasic contractions after 1 year and 11 at the end (not significant, NS), and these contractions were more frequent with colon than with ileum (NS). At the end of follow-up, phasic contraction pressure had decreased while trigger volume had increased (35 vs 28 cm H(2)O; 247 vs 353 ml, NS). All patients are dry and have normal renal function, except one who had mild renal insufficiency before BA. CONCLUSION BA improves bladder capacity and pressure, and these changes are maintained over time (although phasic contractions do not disappear). Repeated urodynamic studies are only necessary when upper urinary tract dilatation or incontinence does not improve.
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