Interleukin-10 expression is positively correlated with oxidized LDL deposition and inversely with T-lymphocyte infiltration in atherosclerotic intimas of human coronary arteries.
ABSTRACT The inflammatory balance modulated by pro- and anti-inflammatory cytokines in atherosclerotic lesions is still unclear. The purpose of this study was to investigate the immunohistochemical localization of interleukin-10 (IL-10) and the topographical correlation between IL-10-positive cells and the other inflammatory cells in human coronary arteries. Coronary arteries (242 sections) were obtained from 43 Japanese patients (mean age: 72+/-14 years) at autopsy, and the intimal changes were classified according to the classification of the American Heart Association. The immunohistochemical distributions of IL-10, oxidized low-density lipoprotein (oxLDL), macrophages, and lymphocytes were examined morphometrically. We compared the ratios of IL-10-positive cells/macrophages and T-lymphocyte number among the shoulder and in other areas of type IV lesions and in atherosclerotic lesion types. IL-10 was expressed mainly by macrophages, and the positive cell number increased as the lesions became advanced (p<0.0001). The number of IL-10-positive cells was positively correlated with that of oxLDL-positive cells, and inversely with infiltrating T-lymphocytes (p<0.01). IL-10 expression in type IV-plaque shoulder was significantly lower than that in fibrous cap and the deeper portion under necrotic core (p<0.01). These findings suggest that IL-10 expression, seen mainly in macrophages, was possibly upregulated with oxLDL, and was inversely correlated with T-lymphocytic function in atherosclerotic coronary intimas.
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ABSTRACT: BACKGROUND: The aim of this study was to evaluate, according to functional response, the neuroendocrine and inflammatory status in patients with chronic heart failure before and after therapy with carvedilol. METHODS AND RESULTS: Serum tumor necrosis factor-α (TNF-α) soluble receptors (sTNF-R1 and sTNF-R2), interleukin (IL)-10 and IL-18, chromogranin A (CgA) and brain natriuretic peptide (pro-BNP) were measured in 37 New York Heart Association class II to IV heart failure patients, at baseline and after 6 months of therapy with carvedilol. Patients were divided in two groups according to whether, following carvedilol, left-ventricular ejection fraction (LVEF) had increased by at least 5% (17 patients) or not (20 patients). Baseline LVEF was higher in nonresponders (38 ± 5 vs. 31 ± 7%, P = 0.002). In responders, LVEF increased from 31 ± 7 to 51 ± 7% (P < 0.0001), whereas in nonresponders it decreased from 38 ± 5 to 33 ± 7%, (P = 0.02). sTNF-R1 (P = 0.019) and sTNF-R2 (P = 0.025) increased in nonresponders, whereas they did not change in responders. After carvedilol, IL-10 was significantly higher in responders (P = 0.03). Conversely, no significant IL-18 and CgA changes were observed in either group. CgA was not significantly different between groups at baseline and after carvedilol in either group, whereas pro-BNP significantly increased in nonresponders (from 438 ± 582 to 1324 ± 1664 pg/ml, P = 0.04) and decreased in responders (from 848 ± 1221 to 420 ± 530 pg/ml, P = 0.08). CONCLUSION: Increased inflammatory activation observed only in heart failure patients not improving left-ventricular function after carvedilol may indicate that inflammation, either as a direct cause or as a consequence, is associated with progressive ventricular dysfunction.Journal of Cardiovascular Medicine 03/2011; · 2.66 Impact Factor
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ABSTRACT: Inflammatory factors modify the risk of coronary heart disease. Pleiotropic cytokine interleukin-10 (IL-10) has been suggested as modifying risk for atherosclerosis. Promoter region genetic polymorphism of IL-10 gene (IL10) is known to be associated with the variation of IL-10 production. We investigated whether single-base exchange polymorphisms -1082 G>A (rs1800896), -819 C>T (rs1800871) and -592 C>A (rs1800872) at IL10 gene are associated with risk factors and early markers of atherosclerosis in young subjects. As a part of the Cardiovascular Risk in Young Finns Study, we determined carotid artery compliance (CAC), stiffness index (SI) and Young's elastic modulus (YEM), intima media thickness (IMT), IL10 genotype and atherosclerosis risk parameters for 2260 subjects aged 24-39 years. In male subjects CAC was lower in carriers of IL-10 high- to intermediate-producer haplotype -1082 G; -819 C; -592 C (GCC+, 1.96+/-0.67) than in noncarriers (GCC-, 2.10+/-0.62, %/10 mmHg, mean+/-SD, p=0.0010). An inverse association was observed in SI (GCC+, 5.76+/-2.12 and GCC-, 5.26+/-1.46, p=0.0034) and YEM (GCC+, 347+/-165 and GCC-, 305+/-110, mm Hg.mm, p=0.0005). Associations remained significant when adjusted to age, BMI, smoking and serum lipids as well as fasting glucose and insulin levels. The genetic effect size for these parameters was not significant in women. IL10 promoter region high- to intermediate-producer haplotype GCC associates with decreased arterial elasticity in men. These results are in disconcordance with the supposed antiatheromatous properties of IL-10.Atherosclerosis 07/2009; 208(1):190-6. · 3.71 Impact Factor
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ABSTRACT: Objectives The characteristics of non-terminal respiratory unit (TRU) type lung adenocarcinoma are still unclear. The aim of the present study was to characterize non-TRU type lung adenocarcinoma. Materials and Methods We analyzed the expression of mucins MUC5B and MUC5AC, as well as thyroid transcription factor-1 (TTF-1), using a tissue microarray comprising lung adenocarcinoma specimens from 244 consecutive patients. The presence of mutations in EGFR and KRAS were also determined. Results TTF-1, MUC5B, and MUC5AC were detected in 219 (89.8%), 75 (30.7%), and 33 cases (13.5%), respectively. Cluster analysis of protein expression profiles and EGFR and KRAS mutations yielded five groups of tumors as follows: TRU1-type [TTF-1(+), MUC5B(-), MUC5AC(-), EGFR mutations(-)]; TRU2-type [TTF-1(+), MUC5B(-), MUC5AC(-), EGFR mutations(+)]; Combined-type [TTF-1(+), MUC5B(+), and/or MUC5AC(+)]; Bronchiolar-type [TTF-1(-), MUC5B(+) and/or MUC5AC(+)]; and Null-type [TTF-1(-), MUC5B(-), MUC5AC(-), EGFR mutations(-), KRAS mutations(-)]. TRU-type tumors, which include TRU1- and TRU2-type tumors, were significantly associated with TRU morphology, whereas Bronchiolar-type tumors were associated with non-TRU morphology. Combined-type cases exhibited intermediate morphologies between TRU-type and Bronchiolar-type cases. TRU-type was associated with significantly better prognosis, followed by Combined-type, Bronchiolar-type, and Null-type (disease-free survival [DFS] P = 0.017; overall survival [OS], P = 0.002). Multivariate analyses indicated that non-TRU type tumors, which include Bronchiolar-, Combined-, Null-type tumors, were significantly correlated with poorer prognoses for DFS (hazard ratio = 1.785; 95% CI, 1.041–3.063; P = 0.035) and OS (hazard ratio = 1.928; 95% CI, 1.084–3.421; P = 0.025). Conclusion This study revealed three distinct subtypes of non-TRU type adenocarcinomas. Additionally, non-TRU type tumors were associated with worse prognoses than TRU type tumors. The results presented here may be useful for select patients should appropriate therapies become availableLung Cancer 01/2014; · 3.39 Impact Factor