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Sökning: WFRF:(Kalpouzos G)

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  • Heiland, Emerald G, et al. (författare)
  • Cerebral small vessel disease, cardiovascular risk factors, and future walking speed in old age : a population-based cohort study.
  • 2021
  • Ingår i: BMC Neurology. - : BioMed Central. - 1471-2377. ; 21:1
  • Tidskriftsartikel (refereegranskat)abstract
    • BACKGROUND: The purpose of this study was to examine the associations between combined and individual cerebral small vessel disease (cSVD) markers on future walking speed over 9 years; and to explore whether these associations varied by the presence of cardiovascular risk factors (CRFs).METHODS: This population-based cohort study included 331 adults, aged ≥60 years, without limitation in walking speed (≥0.8 m/s). At baseline, cSVD markers, including white matter hyperintensities (WMH), lacunes, and perivascular spaces (PVS), were assessed on magnetic resonance imaging. The modifiable CRFs (physical inactivity, heavy alcohol consumption, smoking, hypertension, high total cholesterol, diabetes, and overweight/obese) were combined into a score. The association between baseline cSVD markers and the decline in walking speed was examined using linear mixed-effects models, whereas Cox proportional hazards models were used to estimate the association with walking speed limitation (defined as < 0.8 m/s) over the follow-up.RESULTS: Over the follow-up period, 76 (23.0%) persons developed walking speed limitation. Participants in the highest tertile of the combined cSVD marker score had a hazard ratio (HR) of 3.78 (95% confidence interval [CI] 1.70-8.45) for walking speed limitation compared with people in the lowest score tertile, even after adjusting for socio-demographics, CRFs, cognitive function, and chronic conditions. When investigating the cSVD markers individually, having the highest burden of WMH was associated with a significantly faster decline in walking speed (β coefficient - 0.020; 95% CI -0.035-0.004) and a greater HR of walking speed limitation (HR 2.78; 95% CI 1.31-5.89) compared with having the lowest WMH burden. Similar results were obtained for the highest tertile of PVS (HR 2.13; 95% CI 1.04-4.36). Lacunes were associated with walking speed limitation, but only in men. Having ≥4 CRFs and high WMH volume simultaneously, showed a greater risk of walking speed limitation compared with having ≥4 CRFs and low WMH burden. CRFs did not modify the associations between lacunes or PVS and walking speed.CONCLUSIONS: Combined cSVD markers strongly predict walking speed limitation in healthy older adults, independent of cognitive function, with WMH and PVS being the strongest contributors. Improving cardiovascular health may help to mitigate the negative effects of WMH on future walking speed.
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  • Karshikoff, B., et al. (författare)
  • LPS increases pain sensitivity by decreased pain inhibition and increased insular activation
  • 2015
  • Ingår i: Brain, behavior, and immunity. - : Elsevier BV. - 0889-1591 .- 1090-2139. ; 49, s. e1-e1
  • Tidskriftsartikel (refereegranskat)abstract
    • We have shown that women are more prone to developing LPS-induced pain sensitivity than men, and that the descending endogenous pain inhibition is disrupted in women during experimental systemic inflammation. The aim of the present study was to investigate some of the central neural mechanisms underlying our previous findings. 51 participants (29 women) were injected with 0.6 ng/kg LPS or saline and went through a thumb-pressure pain fMRI paradigm 2 h after injection. As hypothesized, the subjects injected with LPS had decreased activity in the ventromedial prefrontal cortex and rostral anterior cingulate cortex (rACC), areas involved in descending pain inhibition. In addition, the LPS group had higher activity in the anterior insula, an area involved in medial/affective pain processing and interoception. These effects were not sex dependent. However, the male participants had overall stronger descending pain inhibition, reflected as a stronger rACC activity compared to women. It is possible that the more robust activation of descending pain inhibition rendered the men more resistant to the immune provocation, which may explain previously seen sex differences in LPS-induced pain sensitivity. Our findings give an indication to how the pain matrix is affected during a sickness response. The results strengthen the proposed link between systemic inflammation and weakened pain regulation in chronic pain disorders, and offers a possible mechanism underlying the female predominance in chronic pain disorders.
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