3 research outputs found
Intragraft interleukin 2 mRNA expression during acute cellular rejection and left ventricular total wall thickness after heart transplantation
OBJECTIVE: To assess whether diastolic graft function is influenced by
intragraft interleukin 2 (IL-2) messenger RNA (mRNA) expression in
rejecting cardiac allografts. DESIGN: 16 recipients of cardiac allografts
were monitored during the first three months after transplantation. The
presence of IL-2 mRNA in endomyocardial biopsies (n = 123) was measured by
reverse transcriptase polymerase chain reaction. To determine heart
function, concurrent M mode and two dimensional Doppler echocardiograms
were analysed. RESULTS: Histological signs of acute rejection
(International Society for Heart and Lung Transplantation (ISHLT)
rejection grade > 2) were strongly associated with IL-2 mRNA expression
(IL-2 mRNA was present in 12 of 20 endomyocardial biopsies (60%) with
acute rejection and in 24 of 103 endomyocardial biopsies (23%) without
acute rejection, p = 0.002). No significant relation was found between
either histology or IL-2 mRNA expression alone and the studied
echocardiographic parameters. However, stratification of the
echocardiographic data into those of patients with and those without acute
rejection showed that during acute rejection IL-2 mR
Pro-inflammatory cytokine blockade attenuates myeloid expansion in a murine model of rheumatoid arthritis
Contains fulltext :
229479.pdf (publisher's version ) (Open Access)Rheumatoid arthritis (RA) is a debilitating autoimmune disease characterized by chronic inflammation and progressive destruction of joint tissue. It is also characterized by aberrant blood phenotypes including anemia and suppressed lymphopoiesis that contribute to morbidity in RA patients. However, the impact of RA on hematopoietic stem cells (HSC) has not been fully elucidated. Using a collagen-induced mouse model of human RA, we identified systemic inflammation and myeloid overproduction associated with activation of a myeloid differentiation gene program in HSC. Surprisingly, despite ongoing inflammation, HSC from arthritic mice remain in a quiescent state associated with activation of a proliferation arrest gene program. Strikingly, we found that inflammatory cytokine blockade using the interleukin-1 receptor antagonist anakinra led to an attenuation of inflammatory arthritis and myeloid expansion in the bone marrow of arthritic mice. In addition, anakinra reduced expression of inflammation-driven myeloid lineage and proliferation arrest gene programs in HSC of arthritic mice. Altogether, our findings show that inflammatory cytokine blockade can contribute to normalization of hematopoiesis in the context of chronic autoimmune arthritis