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Find video protocols related to scientific articles indexed in Pubmed.
CSF neurofilament light differs in neurodegenerative diseases and predicts severity and survival.
Neurology
PUBLISHED: 10-22-2014
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We hypothesized that CSF neurofilament light (NFL) levels would be elevated in dementias with subcortical involvement, including vascular dementia (VaD), but less elevated in dementias primarily affecting gray matter structures, such as Alzheimer disease (AD), and that elevated CSF NFL would correlate with disease severity and shorter survival time irrespective of clinical diagnosis.
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Plasma parathyroid hormone is associated with vascular dementia and cerebral hyperintensities in two community-based cohorts.
J. Clin. Endocrinol. Metab.
PUBLISHED: 08-20-2014
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In diseases with increased PTH such as hyperparathyroidism and chronic renal failure, dementia is common. Little is known of PTH and dementia in the community.
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Dietary Patterns and Cognitive Dysfunction in a 12-Year Follow-up Study of 70 Year Old Men.
J. Alzheimers Dis.
PUBLISHED: 07-27-2014
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Background: Adherence to dietary patterns has been associated with cognitive decline and dementia, but studies are inconsistent. Objective: Dietary patterns, i.e., WHO recommendations (Healthy Diet Indicator), a Mediterranean-like diet (modified Mediterranean Diet Score, mMDS), and a low carbohydrate high protein diet (LCHP), were related to incident cognitive dysfunction, as indicated by Alzheimer's disease (AD), all-type dementia, and all-type cognitive impairment, in a cohort of 1,138 elderly Swedish men. Methods: Dietary patterns were derived from 7-day records. Risk relations were calculated by Cox and logistic regression analyses, adjusted for potential confounders. Sensitivity analysis was performed in a subpopulation (n = 564) with energy intake according to the Goldberg cut-off. Results: During a mean follow-up of 12 years, 84, 143, and 198 men developed AD, all-type dementia, and all-type cognitive impairment, respectively. There was no association between Healthy Diet Indicator and any of the outcomes. Hazard ratios associated with 1 standard deviation (SD) increment in the LCHP score were 1.16 (95% confidence interval [CI]: 0.95, 1.43) for AD and 1.16 (95% CI: 0.99, 1.37) for all-type dementia. mMDS was not associated with dementia diagnosis. Odds ratio (OR)/1 SD increase for mMDS and all-type cognitive impairment was 0.82 (95% CI: 0.65, 1.05). In the subpopulation OR for mMDS and all-type cognitive impairment was 0.32 (95% CI: 0.11, 0.89). Conclusion: We found no strong associations with development of cognitive dysfunction for any of the dietary patterns investigated. However, there was a potentially beneficial association for a Mediterranean-like diet on the development of cognitive dysfunction in the subpopulation.
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Cancer death is related to high palmitoleic acid in serum and to polymorphisms in the SCD-1 gene in healthy Swedish men.
Am. J. Clin. Nutr.
PUBLISHED: 12-24-2013
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A high proportion of monounsaturated fatty acids (MUFAs) or a high ratio of MUFAs to saturated fatty acids in plasma, reflecting a high activity of the lipogenic enzyme stearoyl-CoA desaturase-1 (SCD-1), has been shown to be related to cancer death and incidence in some studies.
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Pseudoexfoliation and Alzheimers disease: a population-based 30-year follow-up study.
Acta Ophthalmol
PUBLISHED: 07-23-2013
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Purpose:? To determine the effect of pseudoexfoliation (PEX) on the development of Alzheimers disease (AD) in a population in which PEX is a common finding. The relationship between open-angle glaucoma (OAG) and AD was also studied. Methods:? Predictors of incident AD, including mixed and unspecified dementia, were analysed in a cohort of 679 residents 65-74?years of age, examined in a population survey in the municipality of Tierp, Sweden, 1984-1986. To expand the cohort, participants in other studies in Tierp were enrolled. In this way, the cohort embraced 1123 people, representing more than 15?700 person-years at risk. Medical records were reviewed to identify subjects diagnosed with dementia. Those with a follow-up time shorter than 2?years were excluded from the study. Results:? By the conclusion of the study, in December 2011, 174 new cases of AD, including mixed and unspecified dementia, had been detected, 41 of whom were affected by PEX at baseline. Higher age and female gender were the only predictors identified. No association between PEX and AD was found (hazard ratio 0.98; 95% confidence interval 0.69-1.40). Newly diagnosed OAG at baseline did not increase the risk (hazard ratio 1.09; 95% confidence interval 0.69-1.74). Conclusion:? Pseudoexfoliation is not a predictor of AD. No association was found between OAG and AD.
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Mediterranean diet habits in older individuals: Associations with cognitive functioning and brain volumes.
Exp. Gerontol.
PUBLISHED: 05-18-2013
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To examine the association between dietary habits, cognitive functioning and brain volumes in older individuals, data from 194 cognitively healthy individuals who participated in the Prospective Investigation of the Vasculature in Uppsala Seniors cohort were used. At age 70, participants kept diaries of their food intake for 1week. These records were used to calculate a Mediterranean diet (MeDi) score (comprising dietary habits traditionally found in Mediterranean countries, e.g. high intake of fruits and low intake of meat), with higher scores indicating more pronounced MeDi-like dietary habits. Five years later, participants cognitive capabilities were examined by the seven minute screening (7MS) (a cognitive test battery used by clinicians to screen for dementia), and their brain volumes were measured by volumetric magnetic resonance imaging. Multivariate linear regression analyses were constructed to examine the association between the total MeDi score and cognitive functioning and brain volumes. In addition, possible associations between MeDis eight dietary features and cognitive functioning and brain volumes were investigated. From the eight dietary features included in the MeDi score, pertaining to a low consumption of meat and meat products was linked to a better performance on the 7MS test (P=0.001) and greater total brain volume (i.e. the sum of white and gray matter, P=0.03) when controlling for potential confounders (e.g. BMI) in the analysis. Integrating all dietary features into the total MeDi score explained less variance in cognitive functioning and brain volumes than its single dietary component meat intake. These observational findings suggest that keeping to a low meat intake could prove to be an impact-driven public health policy to support healthy cognitive aging, when confirmed by longitudinal studies. Further, they suggest that the MeDi score is a construct that may mask possible associations of single MeDi features with brain health domains in elderly populations.
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Late-life alcohol consumption and cognitive function in elderly men.
Age (Dordr)
PUBLISHED: 02-12-2013
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Moderate alcohol consumption (one to two drinks per day) has been associated with better cognitive function and lower risk of developing dementia in the elderly. In light of alcohols well-known neurotoxic properties, more evidence from well-controlled population-based studies is required. The objective of this study was to examine whether self-reported alcohol intake at age 70 is linked to cognitive function (assessed by trail making tests (TMTs) A and B, which are measures of attention, mental speed, and flexibility) in a population-based cohort consisting of 652 cognitively healthy elderly men. Linear regression models were used to assess both cross-sectional (i.e., age 70) and prospective (i.e., age 77) associations between alcohol intake and cognitive function. The analyses were adjusted for education, body mass index, energy intake, self-reported physical activity, smoking, a history of hypertension or diabetes, apolipoprotein E ?4 status, and cholesterol levels at the age of 70. Baseline data were obtained from 1990 to 1996. Self-reported alcohol intake (mean 6.9?±?7.1 g/day) was associated with better performance on TMT-B at ages 70 and 77 (??=?-0.87, p?
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Decreased proportion of cytomegalovirus specific CD8 T-cells but no signs of general immunosenescence in Alzheimers disease.
PLoS ONE
PUBLISHED: 01-01-2013
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Cytomegalovirus (CMV) has been suggested as a contributing force behind the impaired immune responsiveness in the elderly, with decreased numbers of naïve T-cells and an increased proportion of effector T-cells. Immunological impairment is also implicated as a part of the pathogenesis in Alzheimers disease (AD). The aim of this study was to investigate whether AD patients present with a different CMV-specific CD8 immune profile compared to non-demented controls. Blood samples from 50 AD patients and 50 age-matched controls were analysed for HLA-type, CMV serostatus and systemic inflammatory biomarkers. Using multi-colour flow cytometry, lymphocytes from peripheral blood mononuclear cells were analysed for CMV-specific CD8 immunity with MHC-I tetramers A01, A02, A24, B07, B08 and B35 and further classified using CD27, CD28, CD45RA and CCR7 antibodies. Among CMV seropositive subjects, patients with AD had significantly lower proportions of CMV-specific CD8 T-cells compared to controls, 1.16 % vs. 4.13 % (p=0.0057). Regardless of dementia status, CMV seropositive subjects presented with a lower proportion of naïve CD8 cells and a higher proportion of effector CD8 cells compared to seronegative subjects. Interestingly, patients with AD showed a decreased proportion of CMV-specific CD8 cells but no difference in general CD8 differentiation.
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Vascular risk factors and dementia: 40-year follow-up of a population-based cohort.
Dement Geriatr Cogn Disord
PUBLISHED: 06-10-2011
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Our aim was to evaluate the longitudinal associations of individual and multiple vascular risk factors with the subsequent development of dementia and Alzheimers disease (AD).
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In vivo imaging of astrocytosis in Alzheimers disease: an ¹¹C-L-deuteriodeprenyl and PIB PET study.
Eur. J. Nucl. Med. Mol. Imaging
PUBLISHED: 04-14-2011
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Astrocytosis is an important feature of the neuropathology of Alzheimers disease (AD), yet there is currently no way of detecting this phenomenon in vivo.
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The fat mass and obesity gene is linked to reduced verbal fluency in overweight and obese elderly men.
Neurobiol. Aging
PUBLISHED: 01-07-2011
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Humans carrying the prevalent rs9939609 A allele of the fat mass and obesity-associated (FTO) gene are more susceptible to developing obesity than noncarries. Recently, polymorphisms in the FTO gene of elderly subjects have also been linked to a reduced volume in the frontal lobe as well as increased risk for incident Alzheimer disease. However, so far there is no evidence directly linking the FTO gene to functional cognitive processes. Here we examined whether the FTO rs9939609 A allele is associated with verbal fluency performance in 355 elderly men at the age of 82 years who have no clinically apparent cognitive impairment. Retrieval of verbal memory is a good surrogate measure reflecting frontal lobe functioning. Here we found that obese and overweight but not normal weight FTO A allele carriers showed a lower performance on verbal fluency than non-carriers (homozygous for rs9939609 T allele). This effect was not observed for a measure of general cognitive performance (i.e., Mini-Mental State Examination score), thereby indicating that the FTO gene primarily affects frontal lobe-dependent cognitive processes in elderly men.
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CALHM1 P86L polymorphism does not alter amyloid-beta or tau in cerebrospinal fluid.
Neurosci. Lett.
PUBLISHED: 10-22-2009
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Recently, the P86L alteration in CALHM1 (calcium homeostasis modulator-1) was reported to be associated with Alzheimers disease (AD). Moreover, the risk allele increased amyloid-beta (A beta) levels in conditioned media from cultured cells. Therefore, we hypothesized that CALHM1 P86L may modulate A beta or tau levels in cerebrospinal fluid (CSF). Nearly 200 individuals with AD or other cognitive disorders were included for CSF analysis and CALHM1 genotyping. No significant differences in CSF levels of A beta 42, tau or phospho-tau were found across the various CALHM1 genotypes. In conclusion, we found no evidence that CALHM1 P86L is associated with altered CSF levels of the investigated AD biomarkers.
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Frontotemporal dementia-amyotrophic lateral sclerosis complex is simulated by neurodegeneration with brain iron accumulation.
Alzheimer Dis Assoc Disord
PUBLISHED: 07-02-2009
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We describe a case of late onset neurodegeneration with brain iron accumulation (NBIA) presenting as frontotemporal dementia (FTD) with amyotrophic lateral sclerosis (ALS). A male patient presented at age 66 with change of personality: disinhibition, emotional blunting, and socially inappropriate behavior, coupled with dysarthria, dystonia, and corticospinal tract involvement. Magnetic resonance imaging showed general cortical atrophy, iron deposits in the globus pallidus, and the "eye of the tiger" sign. Neuropsychologic performance was globally reduced, especially executive functions. Fluorodeoxyglucose positron emission tomography showed hypometabolism predominantly in frontal and temporal areas. Repeated neurophysiologic examinations showed signs of chronic denervation. The patient was diagnosed with NBIA but fulfilled consensus criteria for FTD and had a clinical picture of ALS, without neurophysiologic confirmation. Our finding introduces NBIA as a possible cause of FTD and as a differential diagnosis of the FTD-ALS complex.
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Oligomerization partially explains the lowering of Abeta42 in Alzheimers disease cerebrospinal fluid.
Neurodegener Dis
PUBLISHED: 03-16-2009
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The lowering of natively analyzed Abeta42 in cerebrospinal fluid (CSF) is used as a diagnostic tool in Alzheimers disease (AD). The presence of Abeta oligomers can interfere with such analyses causing underestimation of Abeta levels due to epitope masking. The aim was to investigate if the lowering of CSF Abeta42 seen in AD is caused by oligomerization.
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Genetic analysis of Alzheimers disease in the Uppsala Longitudinal Study of Adult Men.
Dement Geriatr Cogn Disord
PUBLISHED: 01-14-2009
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Genetic factors influencing common complex conditions have proven difficult to identify, and data from numerous investigations have provided incomplete conclusions as to the identity of these genes. Here we aimed to identify susceptibility genes for late-onset Alzheimers disease (AD).
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Dietary intake of eicosapentaenoic and docosahexaenoic acids is linked to gray matter volume and cognitive function in elderly.
Age (Dordr)
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In the present study, we tested whether elderly with a high dietary intake of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) would have higher cognitive test scores and greater brain volume than those with low dietary intake of these fatty acids. Data were obtained from the Prospective Investigation of the Vasculature in Uppsala Seniors (PIVUS) cohort. The dietary intake of EPA and DHA was determined by a 7-day food protocol in 252 cognitively healthy elderly (122 females) at the age of 70 years. At age 75, participants global cognitive function was examined, and their brain volumes were measured by magnetic resonance imaging (MRI). Three different multivariate linear regression models were applied to test our hypothesis: model A (adjusted for gender and age), model B (additionally controlled for lifestyle factors, e.g., education), and model C (further controlled for cardiometabolic factors, e.g., systolic blood pressure). We found that the self-reported 7-day dietary intake of EPA and DHA at the age of 70 years was positively associated with global gray matter volume (P?
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Association between physical activity and brain health in older adults.
Neurobiol. Aging
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In the present cross-sectional study, we examined physical activity (PA) and its possible association with cognitive skills and brain structure in 331 cognitively healthy elderly. Based on the number of self-reported light and hard activities for at least 30 minutes per week, participants were assigned to 4 groups representing different levels of PA. The cognitive skills were assessed by the Mini Mental State Examination score, a verbal fluency task, and the Trail-making test as a measure of visuospatial orientation ability. Participants also underwent a magnetic resonance imaging of the brain. Multiple regression analysis revealed that greater PA was associated with a shorter time to complete the Trail-making test, and higher levels of verbal fluency. Further, the level of self-reported PA was positively correlated with brain volume, white matter, as well as a parietal lobe gray matter volume, situated bilaterally at the precuneus. These present cross-sectional results indicate that PA is a lifestyle factor that is linked to brain structure and function in late life.
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The relationship between executive dysfunction and post-stroke mortality: a population-based cohort study.
BMJ Open
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To study the associations of pre-stroke cognitive performance with mortality after first-ever stroke or transient ischaemic attack (TIA).
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Impaired insulin sensitivity as indexed by the HOMA score is associated with deficits in verbal fluency and temporal lobe gray matter volume in the elderly.
Diabetes Care
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Impaired insulin sensitivity is linked to cognitive deficits and reduced brain size. However, it is not yet known whether insulin sensitivity involves regional changes in gray matter volume. Against this background, we examined the association between insulin sensitivity, cognitive performance, and regional gray matter volume in 285 cognitively healthy elderly men and women aged 75 years from the Prospective Investigation of the Vasculature in Uppsala Seniors (PIVUS) study.
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What is Visualize?

JoVE Visualize is a tool created to match the last 5 years of PubMed publications to methods in JoVE's video library.

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We use abstracts found on PubMed and match them to JoVE videos to create a list of 10 to 30 related methods videos.

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In developing our video relationships, we compare around 5 million PubMed articles to our library of over 4,500 methods videos. In some cases the language used in the PubMed abstracts makes matching that content to a JoVE video difficult. In other cases, there happens not to be any content in our video library that is relevant to the topic of a given abstract. In these cases, our algorithms are trying their best to display videos with relevant content, which can sometimes result in matched videos with only a slight relation.