Search results for "H1"
showing 10 items of 1219 documents
Effects of Th1 and Th2 cytokines on cytokine production and ICAM-1 expression on synovial fibroblasts
1995
OBJECTIVES--To investigate the influence of the Th1 and Th2 lymphokines interleukins (IL)-4 and IL-13, interferon gamma (IFN gamma), and several monokines on the adhesion of mononuclear cells to synovial fibroblasts and intercellular adhesion molecule-1 (ICAM-1) expression and cytokine production of synovial fibroblasts in patients with osteoarthritis. METHODS--Synovial fibroblasts were isolated from patients with osteoarthritis and stimulated with IL-1 beta, IL-4, IL-6, IL-10, IL-12, IL-13, tumour necrosis factor alpha (TNF alpha), and IFN gamma. Subsequently, we determined the production of IL-1 alpha, IL-1 beta, IL-6, IL-10, IL-12, IFN alpha and TNF alpha, and the expression of ICAM-1 ly…
A Role for Leukocyte-Derived IL-1RA in DC Homeostasis Revealed by Increased Susceptibility of IL-1RA-Deficient Mice to Cutaneous Leishmaniasis
2011
Dendritic cell (DC)-derived IL-1α/β plays a critical role in the induction of T helper type 1 (Th1)-dependent immunity against Leishmania . DCs from susceptible BALB/c mice produce less IL-1α/β when compared with resistant C57BL/6 mice, contributing to aberrant Th2 development and ultimate death of infected mice. We have extended our studies of the role of IL-1 in leishmaniasis using IL-1RA -/- BALB/c mice that are characterized by upregulated IL-1 receptor signaling. Unexpectedly, infection of IL-1RA -/- mice led to significantly worsened disease outcome with larger lesions, dramatically higher parasite burdens, and decreased IFN-γ production by antigen-specific T cells. We determined that…
Ex vivoevidence for PGE2and LTB4involvement in cutaneous leishmaniasis: relation with infection status and cytokine production
1996
SUMMARYEx vivoculture of spleen cells from BALB/c mice infected with 2 × 106Leishmania major(L.major) promastigotes were cultured with ConcanavalinA (ConA) or leishmanial antigen (L. Ag) and tested for prostaglandin E2(PGE2) and for leukotriene B4(LTB4), in order to study their involvement in the evolution of cutaneous leishmaniasis and the connexion with lymphokine-mediated responses. The data were compared with those obtained in BALB/c mice protected againstL. majorby sublethal irradiation (550 rad; cured mice). In the unprotected BALB/c mice the levels of PGE2that were responsible for the depression of interferon-γ (IFN-γ) and tumour necrosis factor-α (TNFα) Th1-associated cytokines and …
Monophosphoryl lipid A coating of hydroxyethyl starch nanocapsules drastically increases uptake and maturation by dendritic cells while minimizing th…
2015
Enhancing delivery of antigens to dendritic cells (DCs) is essential for the induction of vigorous antigen-specific cellular immune responses. Aim of the present study was to evaluate the properties of hydroxyethyl starch nanocapsules (HES-NCs) functionalized with anti-CD40, anti-DEC205, interferon-γ (IFNγ) and/or monophosphoryl lipid A (MPLA) with respect to the overall uptake, the released cytokine profile, and the influence on phenotypic maturation of human monocyte-derived DCs using flow cytometry, confocal microscopy and enzyme-linked immunosorbent assays. NC uptake by DCs was significantly enhanced by functionalizing NCs with anti-CD40 or MPLA. With respect to the cytokine profile and…
Dendritic Cell-Specific Deletion of β-Catenin Results in Fewer Regulatory T-Cells without Exacerbating Autoimmune Collagen-Induced Arthritis.
2015
Dendritic cells (DCs) are professional antigen presenting cells that have the dual ability to stimulate immunity and maintain tolerance. However, the signalling pathways mediating tolerogenic DC function in vivo remain largely unknown. The beta-catenin pathway has been suggested to promote a regulatory DC phenotype. The aim of this study was to unravel the role of beta-catenin signalling to control DC function in the autoimmune collagen-induced arthritis model (CIA). Deletion of beta-catenin specifically in DCs was achieved by crossing conditional knockout mice with a CD11c-Cre transgenic mouse line. Bone marrow-derived DCs (BMDCs) were generated and used to study the maturation profile of …
Production of functional IL-18 by different subtypes of murine and human dendritic cells (DC): DC-derived IL-18 enhances IL-12-dependent Th1 developm…
1998
IL-18 is a recently described cytokine that shares biological activities with IL-12 in driving the development of Th1-type T cells. As dendritic cells (DC) are very potent inducers of T cell proliferation and differentiation we wondered whether they utilize IL-18 as a factor driving Th1 development. We demonstrate by Northern blot and reverse transcription-PCR that various subtypes of human and murine DC as well as the DC-line XS contain IL-18 mRNA. When supernatants of either enriched Langerhans cells (LC) or bone marrow-derived DC were analyzed for production of IL-18 protein, IL-18 production was detected in an IL-18-specific ELISA. To assess whether the IL-18 protein released by DC is f…
Understanding the relationship between subjective health complaints and satisfaction with life for people in prevocational training in Norway
2021
Background and aim: In Norway, a large part of the population is dependent on disability benefits. The main reasons for this are related to long-term musculoskeletal pain and psychological complaints. Prevocational rehabilitation, aimed at increasing participation in working life, targets people in need of a sheltered vocational environment. This group has been found to report a very high level of health complaints. Therefore, a better understanding of the psychological mechanisms affecting satisfaction with life for people who experience subjective health complaints could be important for tailoring more optimal vocational rehabilitation initiatives for these individuals. This study aimed t…
Funktionskreis e Gestaltkreis: la metafora del circolo nella biologia teoretica
2014
This paper aims to examine the use of the circle metaphor within the functionalist perspective by Jakob von Uexküll and the morphological perspective by Viktor von Weizsäcker. Whereas the functionalist theory dissolves the unity of the organism in the multiplicity of functional relationships, Weizsäcker’s morphology recognizes the fundamental unity of the biological act, leading to a new concept of the living organism.
El Índice de la Felicidad Nacional Bruta como complemento ante las limitaciones de los modelos socio-económicos tradicionales: El caso del Reino de B…
2018
El siguiente ensayo tiene por objetivo repasar las limitaciones que presentan los modelos socio-económicos tradicionales, como el Producto Interno Bruto per cápita, para medir la calidad de vida y el bienestar en aquellas naciones con concepciones, en la economía y el consumo, distintas a las que se manejan en Occidente y en la economía ortodoxa. Se describirán, en qué sentido, los estudios cualitativos, de carácter subjetivos enfocados principalmente en la felicidad, complementan a los modelos clásicos que se vinieron utilizando en el siglo anterior. En este marco se da cuenta del Índice de Felicidad Nacional Bruta, ideado e implementado en el Reino de Bután, pequeño estado budista locali…
De la fundación de un país al muro fronterizo: una perspectiva social e histórica de la migración en Estados Unidos de Norteamérica
2019
El discurso del actual presidente norteamericano, Donald Trump, que ha reivindicado la construccion de un muro en la frontera de ese pais con Mexico; ha manejado cifras que superaban la estimacion existente de extranjeros no autorizados residiendo en el pais y cuya disputa con el partido democrata llevo al shutdown del gobierno mas extenso de la historia del pais, conducen a pensar que el tema de la inmigracion ilegal en los Estados Unidos es creciente. Sin embargo, esa cifra no solamente no aumento sino que descendio (Warren, 2016), en el marco de un contexto que puede dar cuenta de discriminacion y barreras para la integracion plena de los migrantes. El texto considera brevemente el panor…