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Sökning: WFRF:(Jakobsson Anders)

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1.
  • Raghavan, Maanasa, et al. (författare)
  • Genomic evidence for the Pleistocene and recent population history of Native Americans
  • 2015
  • Ingår i: Science. - : American Association for the Advancement of Science (AAAS). - 0036-8075 .- 1095-9203. ; 349:6250
  • Tidskriftsartikel (refereegranskat)abstract
    • Howand when the Americas were populated remains contentious. Using ancient and modern genome-wide data, we found that the ancestors of all present-day Native Americans, including Athabascans and Amerindians, entered the Americas as a single migration wave from Siberia no earlier than 23 thousand years ago (ka) and after no more than an 8000-year isolation period in Beringia. After their arrival to the Americas, ancestral Native Americans diversified into two basal genetic branches around 13 ka, one that is now dispersed across North and South America and the other restricted to North America. Subsequent gene flow resulted in some Native Americans sharing ancestry with present-day East Asians (including Siberians) and, more distantly, Australo-Melanesians. Putative "Paleoamerican" relict populations, including the historical Mexican Pericues and South American Fuego-Patagonians, are not directly related to modern Australo-Melanesians as suggested by the Paleoamerican Model.
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  • Bridel, Claire, et al. (författare)
  • Diagnostic Value of Cerebrospinal Fluid Neurofilament Light Protein in Neurology : A Systematic Review and Meta-analysis
  • 2019
  • Ingår i: JAMA Neurology. - : American Medical Association (AMA). - 2168-6149 .- 2168-6157. ; 76:9, s. 1035-1048
  • Forskningsöversikt (refereegranskat)abstract
    • Importance  Neurofilament light protein (NfL) is elevated in cerebrospinal fluid (CSF) of a number of neurological conditions compared with healthy controls (HC) and is a candidate biomarker for neuroaxonal damage. The influence of age and sex is largely unknown, and levels across neurological disorders have not been compared systematically to date.Objectives  To assess the associations of age, sex, and diagnosis with NfL in CSF (cNfL) and to evaluate its potential in discriminating clinically similar conditions.Data Sources  PubMed was searched for studies published between January 1, 2006, and January 1, 2016, reporting cNfL levels (using the search terms neurofilament light and cerebrospinal fluid) in neurological or psychiatric conditions and/or in HC.Study Selection  Studies reporting NfL levels measured in lumbar CSF using a commercially available immunoassay, as well as age and sex.Data Extraction and Synthesis  Individual-level data were requested from study authors. Generalized linear mixed-effects models were used to estimate the fixed effects of age, sex, and diagnosis on log-transformed NfL levels, with cohort of origin modeled as a random intercept.Main Outcome and Measure  The cNfL levels adjusted for age and sex across diagnoses.Results  Data were collected for 10 059 individuals (mean [SD] age, 59.7 [18.8] years; 54.1% female). Thirty-five diagnoses were identified, including inflammatory diseases of the central nervous system (n = 2795), dementias and predementia stages (n = 4284), parkinsonian disorders (n = 984), and HC (n = 1332). The cNfL was elevated compared with HC in a majority of neurological conditions studied. Highest levels were observed in cognitively impaired HIV-positive individuals (iHIV), amyotrophic lateral sclerosis, frontotemporal dementia (FTD), and Huntington disease. In 33.3% of diagnoses, including HC, multiple sclerosis, Alzheimer disease (AD), and Parkinson disease (PD), cNfL was higher in men than women. The cNfL increased with age in HC and a majority of neurological conditions, although the association was strongest in HC. The cNfL overlapped in most clinically similar diagnoses except for FTD and iHIV, which segregated from other dementias, and PD, which segregated from atypical parkinsonian syndromes.Conclusions and Relevance  These data support the use of cNfL as a biomarker of neuroaxonal damage and indicate that age-specific and sex-specific (and in some cases disease-specific) reference values may be needed. The cNfL has potential to assist the differentiation of FTD from AD and PD from atypical parkinsonian syndromes.
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  • Engblom, David, 1975-, et al. (författare)
  • Induction of microsomal prostaglandin E synthase in the rat brain endothelium and parenchyma in adjuvant-induced arthritis
  • 2002
  • Ingår i: Journal of Comparative Neurology. - : Wiley. - 0021-9967 .- 1096-9861. ; 452:3, s. 205-214
  • Tidskriftsartikel (refereegranskat)abstract
    • Although central nervous symptoms such as hyperalgesia, fatigue, malaise, and anorexia constitute major problems in the treatment of patients suffering from chronic inflammatory disease, little has been known about the signaling mechanisms by which the brain is activated during such conditions. Here, in an animal model of rheumatoid arthritis, we show that microsomal prostaglandin E-synthase, the inducible terminal isomerase in the prostaglandin E2-synthesizing pathway, is expressed in endothelial cells along the blood-brain barrier and in the parenchyma of the paraventricular hypothalamic nucleus. The endothelial cells but not the paraventricular hypothalamic cells displayed a concomitant induction of cyclooxygenase-2 and expressed interleukin-1 type 1 receptors, which indicates that the induction is due to peripherally released cytokines. In contrast to cyclooxygenase-2, microsomal prostaglandin E synthase had very sparse constitutive expression, suggesting that it could be a target for developing drugs that will carry fewer side effects than the presently available cyclooxygenase inhibitors. These findings, thus, suggest that immune-to-brain communication during chronic inflammatory conditions involves prostaglandin E2-synthesis both along the blood-brain barrier and in the parenchyma of the hypothalamic paraventricular nucleus and point to novel avenues for the treatment of the brain-elicited disease symptoms during these conditions.
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5.
  • Engblom, David, 1975-, et al. (författare)
  • Prostaglandins as inflammatory messengers across the blood-brain barrier
  • 2002
  • Ingår i: Journal of Molecular Medicine. - : Springer Science and Business Media LLC. - 0946-2716 .- 1432-1440. ; 80:1
  • Tidskriftsartikel (refereegranskat)abstract
    • Upon immune challenge the brain launches a wide range of responses, such as fever, anorexia, and hyperalgesia that serve to maintain homeostasis. While these responses are adaptive during acute infections, they may be destructive during chronic inflammatory conditions. Research performed during the last decade has given us insight into how the brain monitors the presence of a peripheral inflammation and the mechanisms underlying the brain-mediated acute-phase reactions. Here we give a brief review on this subject, with focus on the role of prostaglandin E2 produced in cells associated with the blood-brain barrier in immune-to-brain signaling. The recent advances in this field have not only elucidated the mechanisms behind the anti-pyretic and anti-hyperalgesic effects of cyclooxygenase inhibitors, but have also identified novel and more-selective potential drug targets.
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6.
  • Günther, Torsten, et al. (författare)
  • Population genomics of Mesolithic Scandinavia : Investigating early postglacial migration routes and high-latitude adaptation
  • 2018
  • Ingår i: PLoS biology. - : Public Library of Science (PLoS). - 1544-9173 .- 1545-7885. ; 16:1
  • Tidskriftsartikel (refereegranskat)abstract
    • Scandinavia was one of the last geographic areas in Europe to become habitable for humans after the Last Glacial Maximum (LGM). However, the routes and genetic composition of these postglacial migrants remain unclear. We sequenced the genomes, up to 57x coverage, of seven hunter-gatherers excavated across Scandinavia and dated from 9,500-6,000 years before present (BP). Surprisingly, among the Scandinavian Mesolithic individuals, the genetic data display an east-west genetic gradient that opposes the pattern seen in other parts of Mesolithic Europe. Our results suggest two different early postglacial migrations into Scandinavia: initially from the south, and later, from the northeast. The latter followed the ice-free Norwegian north Atlantic coast, along which novel and advanced pressure-blade stone-tool techniques may have spread. These two groups met and mixed in Scandinavia, creating a genetically diverse population, which shows patterns of genetic adaptation to high latitude environments. These potential adaptations include high frequencies of low pigmentation variants and a gene region associated with physical performance, which shows strong continuity into modern-day northern Europeans.
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7.
  • Håkansson, Anders, et al. (författare)
  • Romanfigurer ger liv åt tentans patientfall
  • 2003
  • Ingår i: Läkartidningen. - 0023-7205. ; 100:43, s. 7-3425
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • I Lund avslutas läkarutbildningens tionde termin med en MEQ-skrivning (Modified Essay Questions). Höstterminen 2002 hämtade vi bakgrundsmiljö och persongalleri till frågornas fallbeskrivningar från ett skönlitterärt verk. Initiativet föll väl ut hos studenterna – de tyckte att boken var bra och att upplägget var utmärkt. Också författaren var nöjd – efter vår »medikalisering« lärde han känna sina romanfigurer på ett nytt och annorlunda sätt.
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10.
  • Junuzovic, Mensura, et al. (författare)
  • Firearm deaths in Sweden
  • 2019
  • Ingår i: European Journal of Public Health. - : Oxford University Press. - 1101-1262 .- 1464-360X. ; 29:2, s. 351-358
  • Tidskriftsartikel (refereegranskat)abstract
    • Background: Sweden’s firearm legislation obligates physicians to report patients that are deemed unsuitable to possess a firearm. This study aimed to explore the involvement of firearm use in firearm fatalities and to evaluate physician reporting concerning cases of firearm deaths.Methods: Fatal firearm suicides and homicides in Sweden were studied for the years 2012–2013, accidental deaths and undetermined manner of deaths for the period 1987–2013. Police reports and autopsy protocols were collected from the National Board of Forensic Medicine, healthcare data in 1 year before the fatality from the National Board of Health, and information about physician reports and firearm licences from the Swedish Police.Results: A total of 291 firearm deaths (213 suicides, 52 accidental deaths, 23 solved homicides and 3 cases with undetermined manner of death) were identified. Firearm suicides were positively correlated with the number of licensed firearm owners. Legal firearm use predominated in firearm suicides and accidental deaths, illegal in homicides. No suicide victim or shooter in an accidental death was previously reported by a physician to the police according to the firearm law. The majority of the shooters in accidental deaths and suicides had no registered health care visits. Less than half (42%) of all suicide victims had a previous health care contact due to mental health problems. Conclusions: Not one single suicide victim nor any shooter in accidental deaths in the present study had been reported according to the firearm law, bringing the evidence of a suboptimal framework.
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