Effect of weight loss on inflammation in patients with mild obstructive sleep apnea

Background and aimsInflammation may be one mediating mechanism for cardiovascular diseases in obstructive sleep apnea (OSA). However, little is known about subclinical inflammation or the effect of lifestyle intervention on inflammation in early stages of OSA. The aim of this substudy of an existing randomized controlled trial, with post hoc analyses, was to determine the impact of lifestyle changes aimed at weight reduction on inflammatory biomarkers in overweight patients with mild OSA.Methods and resultsPatients were randomized to supervised intensive lifestyle intervention group (N = 28) or to control group (N = 31), which received routine lifestyle advices. Circulating concentrations of pro- and anti-inflammatory mediators were measured before and after the 1-year intervention. The concentrations of two pro-inflammatory mediators, high-sensitivity C-reactive protein (hsCRP) and interleukin (IL)-6, decreased significantly in both groups. Although the changes in inflammatory biomarkers favored the supervised lifestyle intervention, the only significant reduction observed between the groups was for the anti-inflammatory IL-1 receptor antagonist (IL-1RA). The change in hsCRP was associated with apnea–hypopnea index, and improving night-time oxygen saturation was related to tumor necrosis factor alpha. IL-1RA and IL-6 were associated with insulin metabolism.ConclusionWeight loss resulted in reductions in concentrations of some pro- and anti-inflammatory mediators in overweight patients with mild OSA, overall favoring the supervised lifestyle intervention. These findings suggest that more intensive treatment of obesity in OSA patients might be well-justified. Trial Registration clinicaltrials.gov ID: NCT00486746, June 7th 2007.     

Preoperative and Postoperative Response to Inhaled Nitric Oxide

The preoperative dose response to inhaled nitric oxide (NO) was compared with the need for and response to NO after cardiac surgery in patients with congenital heart defect and secondary pulmonary hypertension. In a preoperative vasodilator test with inhaled NO 20, 40 and 80 ppm and oxygen, mean pulmonary artery pressure (PAP) was at least 40 mmHg and/or the pulmonary vascular resistance index (PVRI) 4 Wood units. Preoperatively, NO 40 ppm and Fi0₂ 0.9 reduced systolic pulmonary/systemic arterial pressure (PAPs/SAPs) from 0.89 (SD 0.10) to 0.80 (0.18) and pulmonary/systemic vascular resistance (PVR/SVR) from 0.26 (0.13) to 0.13 (0.08). Haemodynamic assessment was repeated in 11 patients postoperatively. NO treatment was started if PAPs/SAPs rose to 0.8 or the pulmonary oximetry fell below 40%. Postoperatively, eight of 11 patients, including 6 patients with Down's syndrome, needed NO. PAPs/SAPs decreased more than preoperatively: 48.5% vs 11.2, p = 0.0045. Pulmonary oximetry increased by 15.7%, p = 0.02. The degree of preoperative response to NO did not differ between the patients with postoperative pulmonary hypertension and the other children. Patients with early pulmonary hypertensive crisis (first 24 h; n = 6) had a higher PVRI (7.6 vs 4.4 Um²; p = 0.003) and PVR/SVR (0.34 VS 0.17; p = 0.02) preoperatively. Two patients died in pulmonary hypertensive crisis.     

Distally-based peroneus brevis muscle flap: A successful way of reconstructing lateral soft tissue defects of the ankle

Sixteen distally-based peroneus brevis muscle flaps were used to cover soft tissue defects in the lateral side of the ankle. The defect in 13 cases was on the lateral malleolus, in two on the lateral side of the calcaneus, and in one case in the Achilles tendon. The patients were all followed up until full recovery (mean 7.6 months, range 1.5–22 months). One flap failed to cover the defect and was replaced with a microvascular latissimus dorsi flap. In three cases minor revision and new skin grafting of the distal end of the flap was necessary. In 15 of the 16 patients the distally-based peroneus brevis muscle was successful in covering the lateral defect in the ankle. The technique of harvesting a flap is reliable, fast, and the overall success of the flap is good. The flap is particularly suitable for covering small or moderate sized defects on the lateral malleolus.     

Serum cholesterol during 27 years: assessment of systematic error and affecting factors and their role in interpreting population trends

BACKGROUND: The aim was to assess which factors cause a systematic error in serum total cholesterol measurements and how bias can influence the interpretation of serum cholesterol changes of the Finnish population. METHODS: Data on precision and accuracy during 27 years for serum total cholesterol were documented from participation in 438 rounds of five different external quality assessment (EQA) programs. RESULTS: The mean annual accuracy (bias) of the cholesterol assay using the results from all EQAs during 1978-2004 was -0.74% (95%CI -0.88 to -0.60). An exceptionally large deviation in bias coincided with the introduction of a new serum calibrator lot. New methods or instrumentation had only a minor impact on serum cholesterol bias. The mean serum cholesterol bias during the latest five population studies in 1982-2002 was -0.10% (95%CI -0.60 to 0.40) but comparison of the bias between the last study (CDC EQA in 2002) and the four previous ones (WHO EQA) showed a net difference of 3.32% (p<0.001). Correcting the mean serum cholesterol of men with respect to WHO and CDC EQA bias changed the interpretation for the last two survey years from an increase of 1.8% to no change. CONCLUSIONS: It is necessary to participate in EQA programs, which include target values measured by the CDC cholesterol reference method and then to perform bias corrections on the mean cholesterol values of the populations.     

Fecal calprotectin, MMP-9, and human beta-defensin-2 levels in pediatric inflammatory bowel disease

Purpose

Fecal MMP-9 and human beta-defensin-2 (HBD-2) levels, potential markers of intestinal inflammation, are insufficiently explored in pediatric inflammatory bowel disease (IBD). The aim was to study fecal MMP-9 and HBD-2 in pediatric IBD to compare their performance to calprotectin and to study whether they would provide additional value in categorizing patients according to their disease subtype.

Methods

Fecal calprotectin, MMP-9, and HBD-2 levels were measured with ELISA in 110 pediatric patients with IBD (Crohn’s disease, n?=?68; ulcerative colitis (UC), n?=?27; unclassified, n?=?15; median age, 14). To compare the performance of the fecal markers, the area under the receiver operating characteristics curve (±95 % CI) was used. In addition, the best cut-off values of each measure to differentiate IBD patients and controls (n?=?27 presenting with diarrhea, abdominal pain, and/or anemia) were derived by maximizing sensitivity and specificity.

Results

Of the fecal markers studied, calprotectin performed best for separation of IBD and non-IBD patients with the area under curve (AUC) of 0.944 (95 % CI, 0.907 to 0.981). For MMP-9, AUC was 0.837 (95 % CI, 0.766 to 0.909), the levels being significantly higher in active IBD and in UC compared with Crohn’s disease (p?=?0.0013), but categorization of these patient groups did not take place. HBD-2 did not categorize any of the studied groups.

Conclusions

Calprotectin was the best fecal marker in pediatric IBD, but MMP-9 showed almost comparable performance in UC, suggesting applicability as a surrogate marker of inflammation. Fecal HBD-2 did not bring information to the disease characteristics of pediatric IBD patients.     

Schizophrenia and pregnancy: a national register-based follow-up study among Finnish women born between 1965 and 1980

Archives of Women's Mental Health - To assess psychosocial and somatic risk factors related to pregnancy, and pregnancy-related complications or disorders in women with schizophrenia compared...     

Maternal Genetic Variants of IL4/IL13 Pathway Genes on IgE With "Western or Eastern Environments/Lifestyles"

Purpose

We investigated maternal genetic effects of four IL-4/IL-13 pathway genes as well as their interactions with the "Western or Eastern lifestyles/environments" on IgE in Karelian children.

Methods

This study included 609 children and their mothers. Total IgE levels in children and mothers were measured and 10 single nucleotide polymorphisms (SNPs) in IL-4, IL-4Ra, IL-13, and STAT6 were genotyped in mothers and their children.

Results

The maternal G allele of IL-13 130 (rs20541) was significantly (P=0.001) associated with decreased IgE in children in the Karelian population (Pooling Finnish and Russian children), as well as in Finnish (P=0.030) and Russian children (P=0.018). The IgE levels were significantly (P=0.001) higher in Russian children whose mothers were homozygous for the G allele of the IL-4Ra 50 (rs1805010) SNP than that in Russian children of mothers who were AG heterozygotes or AA homozygotes. After accounting for children''s genotypes, we observed interactive effects on children''s IgE for maternal IL-13 130 genotypes (P=0.014) and maternal IL-4Ra 50 genotypes (P=0.0003) with "Western or Eastern" lifestyles/environments. With the adjustment for multiple comparisons using a false discovery rate (FDR) of 0.05, the interactive effect of the maternal IL-4Ra50 SNP was significant.

Conclusion

Maternal genetic variants in IL-4/IL-13 pathway genes, such as IL-13 130 and IL-4Ra50, influenced IgE levels in school children that were independent of the children''s genetic effects. These effects differ in "Western or Eastern" environments.