Interleukin-10-modulated immature dendritic cells control the proinflammatory environment in multiple sclerosis

Multiple sclerosis (MS) is a disabling, inflammatory, demyelinating disease of the central nervous system considered to be mediated by autoreactive T cells. Dendritic cells (DC), being professional antigen-presenting cells, play a pivotal role in the decision between T-cell activation and anergy. It has been suggested that mature DC (mDC) induce immunity, whereas immature DC (imDC) have the potential to induce tolerance. In this study, we investigated the effects of autologous imDC versus autologous mDC on lymphocytes with respect to the expression of functionally important cell-surface molecules and production of cytokines. Our aims were to investigate whether the maturation status of DC differs between MS and healthy controls (HC) and to explore whether the effects of DC on T-cell responses differ between MS and HC. DC were generated from adherent blood mononuclear cells from patients with MS and HC. imDC were obtained by culture with either granulocyte-macrophage colony-stimulating factor (GM-CSF) + interleukin-4 (IL-4) or GM-CSF + IL-4 + IL-10. mDC were obtained by adding lipopolysaccharide to DC cultures. Upon coculture with autologous lymphocytes, mDC activated the autologous T cells as reflected by increased CD25 and cytotoxic T-lymphocyte antigen-4 expression on CD4(+) T cells together with the increased production of both T helper 1 (Th1) (IL-2 and interferon-gamma) and Th2 (IL-10 and IL-4) cytokines. Unmodulated naïve imDC induced the production of only IL-4. An exposure of imDC to IL-10 induced the production of IL-4 as well as IL-10 by autologous lymphocytes. We hypothesize that such imDC are important in controlling the proinflammatory environment in vivo in patients with MS.

Elevated expression of CCR5 by myeloid (CD11c+) blood dendritic cells in multiple sclerosis and acute optic neuritis

Myeloid and plasmacytoid dendritic cells (DC) are present in cerebrospinal fluid (CSF) in non-inflammatory neurological diseases (NIND) and elevated in clinically definite multiple sclerosis (MS) and in early MS - acute monosymptomatic optic neuritis (ON). Here, we show that expression of CCR5, a chemokine receptor for regulated on activation, normal T cell expressed and secreted (RANTES) and macrophage inflammatory protein (MIP)-1alpha/beta, is elevated on blood myeloid (CD11c+) DC in MS and ON compared to non-inflammatory controls. In contrast, expression of CXCR4, a receptor for stromal cell-derived factor (SDF)-1alpha, is similar in all groups. Blood myeloid DC from MS patients respond chemotactically to RANTES and MIP-1beta, which are expessed in MS lesions. In active MS and ON, expression of CCR5 by myeloid DC in blood correlates with numbers of these cells in CSF. Thus, elevation of CCR5 may contribute to recruitment of myeloid DC to CSF in MS and ON. Recruitment of plasmacytoid DC to CSF appears to be CCR5-independent.

The relationships between self-leadership and enhanced psychological, health, and work outcomes

Two cross-sectional studies were conducted to examine the correlations between the concept of self-leadership (as described within the framework of the internal family systems model) and enhanced psychological, health, and work outcomes. In Study 1, self-leadership was significantly related to higher psychological functioning (e.g., effective coping style, greater optimism and hardiness, and less ineffectiveness and interpersonal distrust) and better health status (e.g., greater perceived wellness, less perceived stress, and fewer symptoms of illness) in a sample of university students (N = 270). In Study 2, in which a sample of corporate employees (N = 160) was examined, self-leadership was significantly related to greater perceptions of work satisfaction, enhanced communication, quality management, effective work relationships, and in terms of health outcomes, greater perceived wellness and less work stress. Implications of the relationships between self-leadership and psychological, health, and work outcomes are discussed.

The relationship of hardiness, coping strategies, and perceived stress to symptoms of illness

We proposed a conceptual model based on research supporting the relationship between symptoms of illness and the determinants of hardiness, coping strategies, and perceived stress. In this model, hardiness, avoidance coping, and approach coping have paths to perceived stress, perceived stress has a path to symptoms of illness, and hardiness also has a path to symptoms of illness. We examined the goodness of fit of this model using path analysis and tested its stability, as well as the presence of gender effects, in corporate (N = 110) and university (N = 271) samples. The proposed model was a good fit for the data in the corporate sample, and no gender effects were found. The proposed model was not a good fir for the data in the university sample, therefore we added two paths that have received some support in the research: from approach coping to symptoms of illness and from avoidance coping to symptoms of illness. This model was a good fit for the data in the university sample, however, the path from approach coping to symptoms of illness had a critical ratio < 2.0, thus we removed this path and ran the model again. The final model was a good fit for the data, and no gender effects were found. Implications for the relationship of hardiness, coping strategies, and perceived stress to health are discussed.

Influence of IFN-beta1b (Betaferon) on cytokine mRNA profiles in blood mononuclear cells and plasma levels of soluble VCAM-1 in multiple sclerosis

Inflammatory cell infiltration within the central nervous system (CNS) and upregulation of both pro- and anti-inflammatory cytokines are characteristic for multiple sclerosis (MS). Treatment with interferon-beta 1b (IFN-beta1b) reduces the number and severity of MS relapses. To examine whether treatment with IFN-beta1b affects levels of cytokine mRNA expressing blood mononuclear cells (MNC) we employed in-situ hybridization with synthetic oligonucleotide probes to detect and enumerate IFN-gamma, TNF-alpha, IL-10, TGF-beta and perforin mRNA expressing cells in MS patients before treatment with IFN-beta1b and during treatment for 3-6 weeks and for 3-6 months. Numbers of blood MNC spontaneously expressing TNF-alpha and IL-10 mRNA were lower after 3-6 months of treatment, while numbers of IFN-gamma, TGF-beta and perforin mRNA expressing MNC were not affected by treatment. IFN-beta1b had no influence on levels of MBP-reactive IFN-gamma, TNF-alpha, TGF-beta, IL-10 or perforin mRNA expressing blood MNC determined after 3-6 weeks or 3-6 months of treatment. Parallel measurements of plasma concentrations of soluble vascular cell adhesion molecule-1 (sVCAM-1) revealed elevated levels after 3-6 weeks of treatment and these levels remained higher after 3-6 months of treatment. The results suggest that IFN-beta1b treatment upregulates plasma levels of sVCAM-1, but has little effects on numbers of blood MNC expressing mRNA of the pro- and anti-inflammatory cytokines under study.Copyright Lippincott-Raven Publishers

Glutathione transferase isoenzyme patterns in the rat ovary

This study was designed to investigate the expression of different isoenzymes of glutathione transferase (GST) in the rat ovary and to follow possible changes in the pattern of expression during maturation and the different stages of the oestrus cycle. The GST subunits present in the rat ovary (as analyzed by HPLC of affinity-purified GSTs) were A3, A4, M1, M2, M3 and P1. The most abundant subunit in the ovary was A3, but the mu enzymes demonstrated the largest increase (3.5-fold) when the mature ovary was compared to the immature organ. An overall decrease in GST isoenzyme content during dioestrus was observed, but there were no other recurrent changes during the oestrus cycle. Treatment of immature rats with pregnant mare's serum gonadotropin clearly demonstrated that the mu and alpha isoenzymes are up-regulated by gonadotropin stimulation, i.e. a 4-6 fold increase was seen. This treatment also elevated the P1 subunit 3-fold. At present, it is only possible to speculate concerning the mechanism(s) underlying these variations in ovarian GST expression in connection with hormonal changes. The functional significance of these variations is not yet known.

Quality: how do we define it?

When U.S. industry, in the 1980s, woke up to the fact they were losing ground to foreign companies, their first attempts to woo consumers back to the fold revolved around cutting costs to lower prices. It didn't work. But someone finally took notice of the work Edwards Deming and Joseph Jurand were doing to add quality to the value formula for products and services in Japan. A few U.S. companies tried this approach, and it worked. Today everybody is on the quality bandwagon. Pick up any publication--from national news weeklies to small trade newsletters--and there it is.