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Nuevas adipoquinas y contaminantes ambientales en enfermedades reumáticas

Authors: Abella Cajigal, Vanessa;

Nuevas adipoquinas y contaminantes ambientales en enfermedades reumáticas

Abstract

[Resumen]Las adipoquinas son proteínas producidas principalmente por los adipocitos del tejido adiposo blanco (TAB). En las enfermedades reumáticas, las adipoquinas están entre los factores más importantes relacionados con la obesidad que promueven la inflamación o la autoinmunidad. Muchas de ellas son producidas por los propios condrocitos del cartílago articular y actúan localmente en la homeostasis del cartílago. El conocimiento de las acciones de las adipoquinas es todavía incompleto. Por ello, el objetivo principal de las dos primeras partes de esta tesis fue estudiar el papel de dos nuevas adipoquinas, la progranulina (PGRN) y WISP-2, en el metabolismo del cartílago articular. Los bifenilos policlorados no similares a dioxina (NDL-PCBs) son contaminantes orgánicos persistentes que se acumulan en el tejido adiposo causando supresión de la inmunidad y disrupción endocrina. Diversos estudios sugieren que los PCBs pueden estar implicados en la patogénesis de la artrosis. Las alteraciones en los mecanismos de muerte celular programada (apoptosis) están estrechamente relacionadas con la degradación de la matriz extracelular del cartílago articular. La identificación de inductores de la apoptosis es de suma relevancia para entender la patogénesis y/o progresión de la artrosis. Así, el objetivo de la tercera parte del presente trabajo fue evaluar el efecto de tres NDL-PCBs sobre la viabilidad celular y la inducción de la apoptosis en los condrocitos.

[Resumo] As adipoquinas son proteínas producidas principalmente polos adipocitos do tecido adiposo branco (TAB). Nas enfermidades reumáticas, as adipoquinas están entre os factores máís importantes relacionados coa obesidade que promoven a inflamación ou a autoinmunidade. Moitas delas son producidas polos propios condrocitos da cartilaxe articular e actúan localmente na homeostase da cartilaxe. O coñecemento das accións das adipoquinas é aínda incompleto. Por iso, o obxetivo principal das dúas primeiras partes desta tesis foi estudar o papel de dúas novas adipoquinas, a progranulina (PGRN) e WISP-2, no metabolismo da cartilaxe articular. Os bifenilos policlorados non similares a dioxina (NDL-PCBs) son contaminantes orgánicos persistentes que acumúlanse no tecido adiposo causando supresión da inmunidade e disrupción endocrina. Diversos estudos suxiren que os PCBs poden estar impricados na patoxénese da artrose. As alteracións nos mecanismos de morte celular programada (apoptose) están estreitamente relacionadas coa degradación da matriz extracelular da cartilaxe articular. A identificación de inductores da apoptose é de suma relevancia para entender a patoxénese e/ou progresión da artrose. Así, o obxetivo da terceira parte do presente traballo foi evaluar o efecto de tres NDL-PCBs sobre a viabilidade celular e a inducción da apoptose nos condrocitos

[Abstract] Adipokines are proteins produced mainly by adipocytes of white adipose tissue (WAT). In rheumatic diseases, adipokines are among the most important factors related to obesity that promote inflammation or autoimmunity. Many of them are produced by articular cartilage chondrocytes themselves and act locally in cartilage homeostasis. The knowledge of adipokines actions is still incomplete. Therefore, the main objective of the first two parts of this thesis was to study the role of two novel adipokines, progranulin (PGRN) and WISP-2, in articular cartilage metabolism. Non-dioxin-like polychlorinated biphenyls (NDL PCBs) are persistent organic pollutants that accumulate in fatty tissues causing immune suppression and endocrine disruption. Several studies suggest that PCBs may be involved in pathogenesis of osteoarthritis (OA). Alterations in the mechanisms of programmed cell death (apoptosis) are strongly related to the degradation of extracellular matrix (ECM) in the cartilage of OA subjects. Identification of apoptosis inducers is of paramount relevance to understand the pathogenesis and/or progression of OA. Thus, the aim of the present study was to assess the effect of several NDL PCBs on chondrocytes viability and apoptosis induction.

Country
Spain
Related Organizations
Keywords

Adipoquinas, Articulaciones-Enfermedades-Investigación, Reumatismo

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
Green