Miracle-dz/UniFAR-FTUs huggingface dataset:
Association between decline in brain dopamine activity with age and cognitive and motor impairment in healthy individuals.

OBJECTIVE Although it is documented that brain dopamine activity declines with age, the functional significance of this is not known. This study assessed the relation between measures of brain dopamine activity and indexes of motor and cognitive function in healthy individuals. METHOD Thirty healthy volunteers aged 24-86 years were studied with positron emission tomography and [11C]raclopride to assess dopamine D2 receptors. All subjects underwent a neuropsychological test battery that included tasks found to be sensitive to dopamine alterations in patients with neurodegenerative disease and control tasks. RESULTS Transfer of [11C]raclopride from plasma to brain in the striatum and cerebellum was not affected by age. In contrast, D2 receptor availability in the caudate and putamen declined with age. Correlations between D2 receptors and neuropsychological test performance were strongest for the motor task (Finger Tapping Test) and were also significant for most tasks involving frontal brain regions, including measures of abstraction and mental flexibility (Wisconsin Card Sorting Test) and attention and response inhibition (Stroop Color-Word Test, interference score). These relationships remained significant after control for age effects. CONCLUSIONS Age-related decreases in brain dopamine activity are associated with a decline in motor function and may also contribute to impaired performance on tasks that involve frontal brain regions. Interventions that enhance dopamine activity may improve performance and quality of life for the elderly. The fact that correlations remained significant after age effects were partialed out suggests that dopamine activity may influence motor and cognitive performance irrespective of age.
Heligmosomoides polygyrus bakeri Induces Tolerogenic Dendritic Cells that Block Colitis and Prevent Antigen-Specific Gut T Cell Responses

Immunological diseases such as inflammatory bowel disease (IBD) are infrequent in less developed countries, possibly because helminths provide protection by modulating host immunity. In IBD murine models, the helminth Heligmosomoides polygyrus bakeri prevents colitis. It was determined whether H. polygyrus bakeri mediated IBD protection by altering dendritic cell (DC) function. We used a Rag IBD model where animals were reconstituted with IL10−/− T cells, making them susceptible to IBD and with OVA Ag-responsive OT2 T cells, allowing study of a gut antigenic response. Intestinal DC from H. polygyrus bakeri-infected Rag mice added to lamina propria mononuclear cells (LPMC) isolated from colitic animals blocked OVA IFN-γ/IL-17 responses in vitro through direct contact with the inflammatory LPMC. DC from uninfected Rag mice displayed no regulatory activity. Transfer of DC from H. polygyrus bakeri-infected mice into Rag mice reconstituted with IL10−/− T cells protected animals from IBD, and LPMC from these mice lost OVA responsiveness. After DC transfer, OT2 T cells populated the intestines normally. However, the OT2 T cells were rendered Ag nonresponsive through regulatory action of LPMC non-T cells. The process of regulation appeared to be regulatory T cell independent. Thus, H. polygyrus bakeri modulates intestinal DC function, rendering them tolerogenic. This appears to be an important mechanism through which H. polygyrus bakeri suppresses colitis. IFN-γ and IL-17 are colitogenic. The capacity of these DC to block a gut Ag-specific IFN-γ/IL-17 T cell response also is significant.
The Relationship of Anti‐MICA Antibodies and MICA Expression with Heart Allograft Rejection

The role of MICA antibodies in acute heart allograft rejection was examined utilizing 190 pre‐ and post‐transplant serum samples from 44 patients collected during the first year after transplantation. MICA antibodies were detected by CDC test on recombinant cell lines and by the newly developed Luminex MICA antibody detection assay. Additionally, MICA expression was analyzed by ‘real time’ RT‐PCR and by immunohistochemistry in 10 endomyocardial biopsies. Only two subjects had HLA antibodies post‐transplant. Nevertheless, MICA antibodies were found in a significant number of subjects. The prevalence of MICA antibodies was significantly higher among those with severe acute rejection (AR) than in those without rejection (60.7% vs. 14.3%, p = 0.0038 by CDC; 55.5% vs. 5.7%, p = 0.0020 by Luminex). In most cases, the appearance of MICA antibodies post‐transplant precedes AR. Following transplantation, MICA up‐regulation correlated with histological evidence of severe rejection. Monitoring for MICA antibodies post‐transplant may be useful to establish new risk factors for acute rejection.
Clinical and virologic effects of four neuraminidase inhibitors in influenza A virus-infected children (aged 4–12 years): an open-label, randomized study in Japan

ABSTRACT Background: Neuraminidase inhibitors (NAIs) reduce influenza symptoms but clear evidence of relationships between viral titer reduction and symptom alleviation is lacking. This open-label, randomized study evaluated differences in viral dynamics between NAIs, and relationships between viral dynamics and influenza symptoms (trial registration number: UMIN000012670). Methods: Patients (n = 123) aged 4–12 years with influenza A virus infection were randomized to intravenous peramivir, oral oseltamivir, inhaled zanamivir, or inhaled laninamivir. Patients received regular viral assessments of nasal discharge, at least until rapid antigen tests were negative. Time to virus clearance, based on influenza virus titer, was the primary endpoint. Results: Peramivir recipients had a significantly shorter time to virus clearance than oseltamivir recipients (adjusted p = 0.035). Comparisons between the peramivir group and other NAI groups were not significant. There were no significant inter-group differences in other clinical efficacy endpoints (time to resolution of fever, time to alleviation of symptoms). However, the peramivir group showed a smaller numerical proportion of relapses with fever or positive virus than the other groups. Conclusions: The time to virus clearance was significantly shorter with peramivir than with oseltamivir. Although no clear relationship between virus dynamics and symptoms was observed, ongoing studies should clarify the situation.
Influence of contextual fear on sleep in mice: a strain comparison.

STUDY OBJECTIVES This study assessed the influence of contextual fear on sleep in inbred and hybrid mouse strains. DESIGN Uninterrupted baseline recordings of sleep were obtained for 3 days in 3 mouse strains. After baseline sleep recording sessions, fear-conditioned mice were presented 15 shock presentations on 4 consecutive days. Control mice were subjected to the same procedures except that they never received shock. Sleep was examined after shock training and after exposure to the shock context alone. SETTINGS N/A. PARTICIPANTS The subjects were mice of 2 inbred (C57BL/6J [B6], N=15; BALB/cJ [C], N=19) strains and 1 hybrid (CB6F1/J [CB6: C x B6], N=17) strain. INTERVENTIONS Electroencephalograms (EEG) and activity were recorded by telemetry, and behavioral states were visually scored based on EEG and motor activity records. MEASUREMENTS AND RESULTS Shock training selectively reduced rapid eye movement (REM) sleep in mice compared to time-matched baseline recordings. The reduction of REM sleep was significantly greater in the reactive C and the F1 hybrid strain compared to the less reactive B6 strain. Posttraining exposure to the context alone reduced REM sleep in much the same manner as exposure to the footshock, with the CB6 hybrid mice exhibiting greater alterations in sleep and a greater reduction of REM sleep. In contrast, mice that did not receive shock training showed increased REM sleep after being returned to the chamber. CONCLUSION Aversive events and the fearful contexts that become associated with them can alter sleep in much the same way. Sleep disruptions after an aversive event or its reminders vary with genetic background.
Possible association between complex congenital heart defects and 11p15 hypomethylation in three patients with severe Silver–Russell syndrome

Silver–Russell syndrome (SRS) is characterized by pre‐ and post‐natal growth restriction that spares head growth, feeding difficulties, and variable dysmorphic facial features without major malformations. Hypomethylation of the paternal 11p15 imprinting control region 1 (ICR1) and maternal uniparental disomy of chromosome 7 are found in 50–60% and in 5–10% of SRS patients, respectively. We report on the pre‐ and post‐natal features of three unrelated SRS patients with unusual congenital heart defects (CHDs). Two patients born prematurely had total anomalous pulmonary venous return and died shortly after birth, and a third patient, now 4 years old, had cor triatriatum sinistrum, which was surgically corrected. In all three patients, the underlying molecular defect was 11p15 ICR1 hypomethylation. Based on a large cohort with molecularly proven SRS, the prevalence of CHD in SRS is estimated at 5.5%. We suggest that the occurrence of CHD in SRS with 11p15 ICR1 hypomethylation is not coincidental, but specific to this genotype. © 2013 Wiley Periodicals, Inc.
Fine structure of identified neurons in the primate hippocampus: A combined Golgi/EM study in the baboon

The hippocampi of two 1‐year‐old female baboons (Papio anubis) were used for a combined Golgi/electron microscope (EM) study of characteristic cell types in the hippocampus proper and fascia dentata. Results were compared with previous Golgi/EM studies of hippocampal neurons in small laboratory animals.
Ketamine attenuates delirium after cardiac surgery with cardiopulmonary bypass.

OBJECTIVE To determine if ketamine attenuates postoperative delirium concomitant with an anti-inflammatory effect in patients undergoing cardiac surgery using cardiopulmonary bypass. DESIGN A prospective randomized study. SETTING A Veterans Affairs medical center. PARTICIPANTS Cardiac surgical patients. INTERVENTIONS Patients at least 55 years of age randomly received placebo (0.9% saline, n = 29) or an intravenous bolus of ketamine (0.5 mg/kg intravenously, n = 29) during anesthetic induction in the presence of fentanyl and etomidate. MEASUREMENTS AND MAIN RESULTS Delirium was assessed by using the Intensive Care Delirium Screening Checklist before and after surgery. Serum C-reactive protein concentrations were determined before and 1 day after surgery. The incidence of postoperative delirium was lower (p = 0.01, Fisher exact test) in patients receiving ketamine (3%) compared with placebo (31%). Postoperative C-reactive protein concentration was also lower (p < 0.05) in the ketamine-treated patients compared with the placebo-treated patients. The odds of developing postoperative delirium were greater for patients receiving placebo compared with ketamine treatment (odds ratio = 12.6; 95% confidence interval, 1.5-107.5; logistic regression). CONCLUSIONS After cardiac surgery using cardiopulmonary bypass, ketamine attenuates postoperative delirium concomitant with an anti-inflammatory effect.
Inferring Cortical Variability from Local Field Potentials

The responses of sensory neurons can be quite different to repeated presentations of the same stimulus. Here, we demonstrate a direct link between the trial-to-trial variability of cortical neuron responses and network activity that is reflected in local field potentials (LFPs). Spikes and LFPs were recorded with a multielectrode array from the middle temporal (MT) area of the visual cortex of macaques during the presentation of continuous optic flow stimuli. A maximum likelihood-based modeling framework was used to predict single-neuron spiking responses using the stimulus, the LFPs, and the activity of other recorded neurons. MT neuron responses were strongly linked to gamma oscillations (maximum at 40 Hz) as well as to lower-frequency delta oscillations (1–4 Hz), with consistent phase preferences across neurons. The predicted modulation associated with the LFP was largely complementary to that driven by visual stimulation, as well as the activity of other neurons, and accounted for nearly half of the trial-to-trial variability in the spiking responses. Moreover, the LFP model predictions accurately captured the temporal structure of noise correlations between pairs of simultaneously recorded neurons, and explained the variation in correlation magnitudes observed across the population. These results therefore identify signatures of network activity related to the variability of cortical neuron responses, and suggest their central role in sensory cortical function. SIGNIFICANCE STATEMENT The function of sensory neurons is nearly always cast in terms of representing sensory stimuli. However, recordings from visual cortex in awake animals show that a large fraction of neural activity is not predictable from the stimulus. We show that this variability is predictable given the simultaneously recorded measures of network activity, local field potentials. A model that combines elements of these signals with the stimulus processing of the neuron can predict neural responses dramatically better than current models, and can predict the structure of correlations across the cortical population. In identifying ways to understand stimulus processing in the context of ongoing network activity, this work thus provides a foundation to understand the role of sensory cortex in combining sensory and cognitive variables.
The relationship of urgent hospital admissions for respiratory illnesses to photochemical air pollution levels in Montreal.

The relationship between the number of daily urgent hospital admissions for respiratory illnesses (31 hospitals) and ambient air pollution in Montreal, Canada, was investigated for warm periods between 1984 and 1988. Air pollutants included 1-hr and 8-hr maximum ozone, estimated particulate matter < or = 10 microns in aerometric diameter (PM10), and estimated sulfate (SO4(2-) fraction of PM10. Regression analyses controlled for seasonal and day-of-week trends, autocorrelation, temperature, and relative humidity. For July and August periods, there was a statistically significant (P < 0.01) univariate relationship of all respiratory admissions to 8-hr maximum ozone, which became nonsignificant when coregressed with temperature. Levels of ozone which never exceeded the U.S. National Ambient Air Quality Standard (NAAQS) of 120 ppb and high intercorrelations between ozone, particulates, and temperature may explain this finding. Asthma admissions in the May-October periods increased by 2.7% over mean levels for each 12 micrograms/m3 increase in PM10 levels 3 days prior to the admission day (95% confidence interval, 0.7 to 4.8%). In the July and August periods, hospital admissions for respiratory illnesses excluding asthma were 9.6% higher (95% confidence interval, 0.5 to 18.7%) when estimated SO4(2-) had exceeded 8.1 micrograms/m3 4 days prior to the admission day compared to days when SO4(2-) was at or below this level. There were no significant (P < 0.05) associations of a reference group of nonrespiratory admissions to air pollution after controlling for weather. The above results were found despite levels of PM10 which never exceeded the NAAQS of 150 micrograms/m3. The associations found are relevant to public health, since hospital admissions are expected to be accompanied by considerably more frequent occurrences of less serious outcomes. The present findings suggest that particulate air pollution during photochemically active periods is related to respiratory morbidity in Montreal.
Fine needle aspiration cytology of lymphoproliferative lesions of the oral cavity

Oral cavity non‐Hodgkin lymphoma (OCL) is a rare condition that may be clinically and radiologically indistinguishable from other pathologies of the mouth. A complete excision or adequate biopsy of the OCL may be difficult. Fine needle aspiration (FNA) cytology has been successfully utilized in the pre‐operative diagnosis of oral masses and in lymphoma involving other anatomical areas. Our experience with FNA pre‐operative cytological diagnosis of 16 OCLs is reported herein.
Instrumented Transforaminal Lumbar Interbody Fusion With Bioresorbable Polymer Implants and Iliac Crest Autograft

Study Design. Twenty-seven patients underwent instrumented transforaminal lumbar interbody fusion (TLIF) procedures using bioresorbable implants as interbody spacers. The greater than 2-year clinical and radiographic results of this series are presented along with as a review of relevant preclinical and preliminary clinical studies of bioresorbables. Objective. To determine the clinical suitability of bioresorbable implants used as interbody spacers in spinal fusion surgery applications, particularly in the TLIF procedure. Summary of Background Data. Bioresorbable technology has been in clinical use by surgeons of a variety of specialties for over 35 years. The use of bioresorbable implants in spine surgery, however, has only been widely investigated in the last several years. The use of slowly degrading bioresorbable implants has the potential for load sharing during fusion when used for interbody applications, retaining imaging quality after fusion, obviating later implant removal, providing biologic barriers as well as other various applications. Animal studies and early clinical series with the use of these materials for a variety of indications have been encouraging. Methods. This study evaluates the use of bioresorbable polymer spacers manufactured with a 70:30 copolymer of poly-L-lactide and D,L-lactide as interbody spacers in 27 of 31 patients with 2 years or more follow-up who underwent instrumented TLIF for primarily degenerative indications. Results. At a mean of 31.9 months follow-up, 25 patients (92.6%) were judged to have solid fusions and 22 patients (81.5%) had good to excellent results. Three patients (11.1%) experienced complications, none of which were directly or indirectly attributable to the use of the bioresorbable polymer implant. Only one implant in 1 patient (3.7%) demonstrated mechanical failure on insertion, and that patient exhibited no clinical sequelae. Conclusions. Bioresorbable implants have significant potential for use in spine surgery. This potential is realized in this first published clinical series using bioresorbable implants as interbody spacers with a minimum follow-up of 2 years, significantly exceeding the biologic “life expectancy” (12–18 months) of the implant material.Both the clinical and radiographic results of this study support the use of interbody devices manufactured from bioresorbable polymers for structural interbody support in the TLIF procedure.
Phylogenetic analysis of sequences from diverse bacteria with homology to the Escherichia coli rho gene

Genes from Pseudomonas fluorescens, Chromatium vinosum, Micrococcus luteus, Deinococcus radiodurans, and Thermotoga maritima with homology to the Escherichia coli rho gene were cloned and sequenced, and their sequences were compared with other available sequences. The species for all of the compared sequences are members of five bacterial phyla, including Thermotogales, the most deeply diverged phylum. This suggests that a rho-like gene is ubiquitous in the Bacteria and was present in their common ancestor. The comparative analysis revealed that the Rho homologs are highly conserved, exhibiting a minimum identity of 50% of their amino acid residues in pairwise comparisons. The ATP-binding domain had a particularly high degree of conservation, consisting of some blocks with sequences of residues that are very similar to segments of the alpha and beta subunits of F1-ATPase and of other blocks with sequences that are unique to Rho. The RNA-binding domain is more diverged than the ATP-binding domain. However, one of its most highly conserved segments includes a RNP1-like sequence, which is known to be involved in RNA binding. Overall, the degree of similarity is lowest in the first 50 residues (the first half of the RNA-binding domain), in the putative connector region between the RNA-binding and the ATP-binding domains, and in the last 50 residues of the polypeptide. Since functionally defective mutants for E. coli Rho exist in all three of these segments, they represent important parts of Rho that have undergone adaptive evolution.
Heme oxygenase‐1 regulates the immune response to influenza virus infection and vaccination in aged mice

Underlying mechanisms of individual variation in severity of influenza infection and response to vaccination are poorly understood. We investigated the effect of reduced heme oxygenase‐1 (HO‐1) expression on vaccine response and outcome of influenza infection. HO‐1‐deficient and wild‐type (WT) mice (kingdom, Animalia; phylum, Chordata; genus/species, Mus musculus) were infected with influenza virus A/PR/8/34 with or without prior vaccination with an adeno‐viral‐based influenza vaccine. A genome‐wide association study evaluated the expression of single‐nucleotide polymorphisms (SNPs) in the HO‐1 gene and the response to influenza vaccination in healthy humans. HO‐1‐deficient mice had decreased survival after influenza infection compared to WT mice (median survival 5.5 vs. 6.5 d, P=0.016). HO‐1‐deficient mice had impaired production of antibody following influenza vaccination compared to WT mice (mean antibody titer 869 vs. 1698, P=0.02). One SNP in HO‐1 and one SNP in the constitutively expressed isoform HO‐2 were independently associated with decreased antibody production after influenza vaccination in healthy human volunteers (P=0.017 and 0.014, respectively). HO‐1 deficient mice were paired with sex‐ and age‐matched WT controls. HO‐1 affects the immune response to both influenza infection and vaccination, suggesting that therapeutic induction of HO‐1 expression may represent a novel adjuvant to enhance influenza vaccine effectiveness. —Cummins, N. W. , Weaver, E. A. , May, S. M. , Croatt, A. J., Foreman, O. , Kennedy, R. B. , Poland, G. A. , Barry, M. A. , Nath, K. A. , Badley, A. D. Heme oxygenase‐1 regulates the immune response to influenza virus infection and vaccination in aged mice. FASEB J. 26, 2911–2918 (2012). www.fasebj. org
Unknown loads affect force production capacity in early phases of bench press throws.

AIM Explosive strength training aims to improve force generation in early phases of movement due to its importance in sport performance. The present study examined the influence of lack of knowledge about the load lifted in explosive parameters during bench press throws. METHODS Thirteen healthy young men (22.8±2.0 years) participated in the study. Participants performed bench press throws with three different loads (30, 50 and 70% of 1 repetition maximum) in two different conditions (known and unknown loads). In unknown condition, loads were changed within sets in each repetition and participants did not know the load, whereas in known condition the load did not change within sets and participants had knowledge about the load lifted. RESULTS Results of repeated-measures ANOVA revealed that unknown conditions involves higher power in the first 30, 50, 100 and 150 ms with the three loads, higher values of ratio of force development in those first instants, and differences in time to reach maximal rate of force development with 50 and 70% of 1 repetition maximum. CONCLUSION This study showed that unknown conditions elicit higher values of explosive parameters in early phases of bench press throws, thereby this kind of methodology could be considered in explosive strength training.