Leceta Martínez, Javier

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First Name
Last Name
Leceta Martínez
Universidad Complutense de Madrid
Faculty / Institute
Ciencias Biológicas
Biología Celular
Biología Celular
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Now showing 1 - 6 of 6
  • Publication
    The pathogenic Th profile of human activated memory Th cells in early rheumatoid arthritis can be modulated by VIP
    (Springer, 2015) Jimeno Lumeras, Rebeca Gema; Pérez Gomáriz, Rosa Mª; Garín, Marina I.; Gutiérrez Cañas, Irene; González Álvaro, Isidoro; Carrión Caballo, Mar; Galindo, María; Leceta Martínez, Javier; Juarranz Moratilla, Yasmina
    Our aim is to study the behavior of memory Th cells (Th17, Th17/1, and Th1 profiles) from early rheumatoid arthritis (eRA) patients after their in vitro activation/expansion to provide information about its contribution to RA chronicity. Moreover, we analyzed the potential involvement of vasoactive intestinal peptide (VIP) as an endogenous healing mediator. CD4+CD45RO+ T cells from PBMCs of HD and eRA were activated/expanded in vitro in the presence/absence of VIP. FACS, ELISA, RT-PCR, and immunocytochemistry analyseswere performed. An increase in CCR6+/RORC+ cells and in RORC-proliferating cells and a decrease in T-betproliferating cells and T-bet+/RORC+ cells were shown in eRA. mRNA expression of IL-17, IL-2, RORC, RORA, STAT3, and Tbx21 and protein secretion of IL-17, IFNγ, and GM-CSF were higher in eRA. VIP decreased the mRNA expression of IL-22, IL-2, STAT3, Tbx21, IL-12Rβ2, IL-23R, and IL-21R in HD and it decreased IL-21, IL-2, and STAT3 in eRA. VIP decreased IL-22 and GM-CSF secretion and increased IL-9 secretion in HD and it decreased IL-21 secretion in eRA. VPAC2/VPAC1 ratio expression was increased in eRA. All in all, memory Th cells from eRA patients show a greater proportion of Th17 cells with a pathogenic Th17 and Th17/1 profile compared to HD. VIP is able to modulate the pathogenic profile, mostly in HD. Our results are promising for therapy in the early stages of RA because they suggest that targeting molecules involved in the pathogenic Th17, Th17/1, and Th1 phenotypes and targeting VIP receptors could have a therapeutic effect modulating these subsets.
  • Publication
    Healthy and Osteoarthritic Synovial Fibroblasts Produce a Disintegrin and Metalloproteinase with Thrombospondin Motifs 4, 5, 7, and 12
    (2016-09) Pérez García, Selene; Gutiérrez Cañas, Irene; Seoane Valiño, Iria V.; Fernández, Julián; Mellado, Mario; Leceta Martínez, Javier; Tío, Laura; Villanueva Romero, Raúl; Juarranz Moratilla, Yasmina; Pérez Gomáriz, Rosa María
    Current description of osteoarthritis includes the involvement of synovial inflammation. Studies contributing to understanding the mechanisms of cross-talk and feedback among the joint tissues could be relevant to the development of therapies that block disease progression. During osteoarthritis, synovial fibroblasts exposed to anomalous mechanical forces and an inflammatory microenvironment release factors such as a disintegrin and metalloproteinase with thrombospondin motifs (ADAMTS) metalloproteinases that mediate tissue damage and perpetuate inflammation. We therefore studied the production of ADAMTS by synovial fibroblasts and their contribution to cartilage degradation. Moreover, we analyzed the implication of two mediators present in the osteoarthritis joint, IL-1β as proinflammatory cytokine, and 45-kDa fibronectin fragments as products of matrix degradation. We reported that synovial fibroblasts constitutively express and release ADAMTS 4, 5, 7, and 12. Despite the contribution of both mediators to the stimulation of Runx2 and Wnt/β-catenin signaling pathways, as well as to ADAMTS expression, promoting the degradation of aggrecan and cartilage oligomeric matrix protein from cartilage, fibronectin fragments rather than IL-1β played the major pathological role in osteoarthritis,contributing to the maintenance of the disease. Moreover, higher levels of ADAMTS 4 and 7 and a specific regulation of ADAMTS-12 were observed in osteoarthritis, suggesting them as new potential therapeutic targets. Therefore, synovial fibroblasts provide the biochemical tools to the chronicity and destruction of the osteoarthritic joints.
  • Publication
    Th17 polarization of memory Th cells in early arthritis: the vasoactive intestinal peptide effect
    (The Society for Leukocyte Biology., 2015-08) Jimeno, Rebeca; Leceta Martínez, Javier; Garín, Marina I.; Ortiz, Ana M.; Mellado, Mario; Rodríguez Frade, José Miguel; Martínez, Carmen; Pérez García, Selene; Pérez Gomáriz, Rosa María; Juarranz Moratilla, Yasmina
    Several studies in humans indicate the implication of Th17 cells in RA. Therapies targeting their pathogenicity, as well as their plasticity to the Th17/1 phenotype, could ameliorate the progression of the pathology. The neuroendocrine environment has a major impact on the differentiation of lymphoid cells. VIP is present in the microenvironment of the joint, and its known therapeutic effects are supported by several studies on RA. We examine the ability of VIP to modulate the differentiation of Th17 cells. Peripheral blood CD4+CD45RO+ T cells from HD and eRA patients were expanded under Th17-polarizing conditions in the presence of TGF-b. After 7 days, the higher IL-17A, IL-21, and IL-9 levels and lower IL-22 levels indicate the nonpathogenic profile for Th17 cells in HD. In contrast, Th17 cells from eRA patients produced significantly more IL-22 and IFN-g, and these cells show a more Th17/1 profile, indicating a pathogenic phenotype. Interestingly, when VIP was present in the Th17 conditioned medium, increased levels of IL-10 and IL-9 were detected in HD and eRA patients. VIP also reduced the levels of IL-22 in eRA patients. These data suggest that VIP reduces the pathogenic profile of the Th17-polarized cells. This effect was accompanied by an increased in the Treg/Th17 profile, as shown by the increase levels of Foxp3. In conclusion, this report addresses a novel and interesting question on the effect of VIP on human Th17 cells and adds clinical relevance by analyzing, in parallel, HD and eRA patients. J. Leukoc. Biol. 98: 000–000; 2015.
  • Publication
    Vasoactive Intestinal Peptide maintains the non-pathogenic profile of human Th17-polarized cells
    (Springer, 2014-11) Jimeno Lumeras, Rebeca Gema; Leceta Martínez, Javier; Martínez, Carmen; Gutiérrez-Cañas, Irene; Carrión Caballo, Mar; Pérez García, Selene; Garín, Marina I.; Mellado, Mario; Pérez Gomáriz, Rosa María; Juarranz Moratilla, Yasmina
    The cytokine microenvironment modulates CD4 T cell differentiation causing the shift of naïve CD4 T cells into different cell subsets. This process is also regulated by modulators such as VIP, a neuropeptide with known immunomodulatory properties on CD4 T cells that exert this action through specific receptors, VPAC1 and VPAC2. Our results show that the pattern of VIP receptors expression ratio is modified during Th17 differentiation. In this report, we evaluate the capacity of VIP to modulate naïve human cells into Th17 cells in vitro by analyzing their functional phenotype. The presence of VIP maintains the non-pathogenic profile of Th17-polarized cells, increases the proliferation rate and decreases their Th1 potential. VIP induces the up-regulation of the STAT3 gene interaction with the VPAC1 receptor during the onset of Th17 differentiation. Moreover, RORC, RORA and IL-17A genes are up-regulated in the presence of VIP through interaction with VPAC1 and VPAC2 receptors. Interestingly, VIP induces the expression of the IL-23R gene through interaction with the VPAC2 receptor during the expansion phase. This is the first report that describes the differentiation of naïve human T cells to Th17-polarized cells in the presence of VIP and demonstrates how this differentiation regulates the expression of the VIP receptors.
  • Publication
    Inhibitory Role of Growth Hormone in the Induction and Progression Phases of Collagen-Induced Arthritis
    (Frontiers Media, 2018-05-25) Villares, Ricardo; Criado, Gabriel; Juarranz Moratilla, Yasmina; López Santalla, Mercedes; García-Cuesta, Eva María; Rodríguez Frade, José Miguel; Leceta Martínez, Javier; Lucas, Pilar; Pablos, José L.; Martínez-A., Carlos; Garín, Marina I.; Gomáriz, Rosa P.; Mellado, Mario
    Evidence indicates an intimate connection between the neuroendocrine and the immune systems. A number of in vitro and in vivo studies have demonstrated growth hormone (GH) involvement in immune regulation. The GH receptor is expressed by several leukocyte subpopulations, and GH modulates immune cell proliferation and activity. Here, we found that sustained GH expression protected against collagen-induced arthritis (CIA); in GH-transgenic C57BL/6 (GHTg) mice, disease onset was delayed, and its overall severity was decreased. The anti-collagen response was impaired in these mice, as were inflammatory cytokine levels. Compared to control arthritic littermates, immunized GHTg mice showed significantly lower RORγt (retinoic acid receptor-related orphan receptor gamma 2), IL-17, GM-CSF, IL-22, and IFNγ mRNA expression in draining lymph nodes, whereas there were no differences in IL-21, IL-6, or IL-2 mRNA levels. Data thus suggest that Th17/Th1 cell plasticity toward a pathological phenotype is reduced in these mice. Exogenous GH administration in arthritic DBA/1J mice reduced the severity of established CIA as well as the inflammatory environment, which also shows a GH effect on arthritis progression. These results indicate that GH prevents inflammatory joint destruction in CIA. Our findings demonstrate a modulatory GH role in immune system function that contributes to alleviating CIA symptoms and underlines the importance of endocrine regulation of the immune response.
  • Publication
    Mechanism of immunoregulatory properties of vasoactive intestinal peptide in the K/BxN mice model of autoimmune arthritis
    (Frontiers Media, 2021-07-16) Leceta Martínez, Javier; Garín, Marina I.; Conde, Carmen
    The K/BxN mouse model of rheumatoid arthritis (RA) closely resembles the human disease. In this model, arthritis results from activation of autoreactive KRN T cells recognizing the glycolytic enzyme glucose-6-phosphate isomerase (GPI) autoantigen, which provides help to GPI-specific B cells, resulting in the production of pathogenic antiGPI antibodies that ultimately leads to arthritis symptoms from 4 weeks of age. Vasoactive intestinal peptide (VIP) is a neuropeptide broadly distributed in the central and peripheral nervous system that is also expressed in lymphocytes and other immune cell types. VIP is a modulator of innate and adaptive immunity, showing anti-inflammatory and immunoregulatory properties. Basically, this neuropeptide promotes a shift in the Th1/ Th2 balance and enhances dedifferentiation of T regulatory cells (Treg). It has demonstrated its therapeutic effects on the collagen-induced arthritis (CIA) mouse model of RA. In the present hypothesis and theory article, we propose that the immunoregulatory properties of VIP may be due likely to the inhibition of T cell plasticity toward non-classic Th1 cells and an enhanced follicular regulatory T cells (Tfr) activity. The consequences of these regulatory properties are the reduction of systemic pathogenic antibody titers.