831 research outputs found
Wolverine Reproductive Den Habitat in Glacier National Park, Montana
Wolverine reproductive dens occur in habitat not easily accessible to humans during the denning period (Feb – May) and can be challenging to find. As such, few den sites have been precisely described. From 2003 – 2007 we located and documented 14 natal and maternal dens of 3 reproductive female wolverine in Glacier National Park. Two females were known to have produced young in multiple years, using different den sites each year. Reproductive dens occurred at an average elevation of 1890m (range: 1805-1999m), on 9° slopes (range: 5-22o), within a variable range of aspects ( =263°), and with an average snow depth of 2.6m (range: 2.4-3.4m). Den structures included downed trees, large boulders, and rock caves associated with alpine cirques, ridges, and cliff bands at, or below, existing tree line. Distance to occupied human development averaged 6.4km, and distance between denning areas of the same female in different years averaged 5.8 km. Various climate change models predict less persistent snowpack in many areas of the conterminous United States, with a resultant potential for increased isolation of island populations of wolverines
Wolverine Food Habitats and Foraging Strategies in Glacier National Park, Montana
From 2003-2007 we captured and instrumented 28 wolverines (Gulo gulo) in Glacier National Park to investigate reproduction and recruitment. We collected 189 scat samples at reproductive den, forage and rendezvous sites, and documented 90 prey species through observation and prey remains found at similar sites. Seasonal scat analysis provided evidence of differences in prey species consumed during winter (n = 170), summer (n = 19), and reproductive den (n = 103) periods. Ungulates were the most frequently observed prey found in all scats (71%; N=135), with Cervid remains being observed most often (37%; n = 70). Hibernating rodents (ground squirrels and marmots) (36%; n = 68) were the next most utilized prey, with the third most documented prey being mice and voles (31%; n = 56). Vegetation (72%; n = 169), soil material (31%; n = 59), and bone (90%; n = 171) were also found in scats. Seasonal importance of prey was documented, with ungulates being the most observed prey in winter scats (75%; n = 128) and den period scats (79%; n = 81), and hibernating rodents being most observed in summer scats (47%; n = 9). A similar condition was found with analysis of all prey remains (n = 90); ungulates were consumed most often (69%; n = 63), with hibernating rodents as the second most documented prey (12%; n = 11). Wolverines exhibited seasonal dietary shifts in that ungulates were consumed most frequently during winter (77%; n = 55) and the den period (78%; n = 17), with hibernating rodents the most frequent prey documented in summer (50%; n = 9). Wolverine foraging strategies, including searching tree wells, fishing, decapitation, and food caching are also discussed
Widespread occurrence of 5-methylcytosine in human coding and non-coding RNA
The modified base 5-methylcytosine (m5C) is well studied in DNA, but investigations of its prevalence in cellular RNA have been largely confined to tRNA and rRNA. In animals, the two m5C methyltransferases NSUN2 and TRDMT1 are known to modify specific tRNAs and have roles in the control of cell growth and differentiation. To map modified cytosine sites across a human transcriptome, we coupled bisulfite conversion of cellular RNA with next-generation sequencing. We confirmed 21 of the 28 previously known m5C sites in human tRNAs and identified 234 novel tRNA candidate sites, mostly in anticipated structural positions. Surprisingly, we discovered 10 275 sites in mRNAs and other non-coding RNAs. We observed that distribution of modified cytosines between RNA types was not random; within mRNAs they were enriched in the untranslated regions and near Argonaute binding regions. We also identified five new sites modified by NSUN2, broadening its known substrate range to another tRNA, the RPPH1 subunit of RNase P and two mRNAs. Our data demonstrates the widespread presence of modified cytosines throughout coding and non-coding sequences in a transcriptome, suggesting a broader role of this modification in the post-transcriptional control of cellular RNA function
A controlled trial of two nucleoside analogues plus indinavir in persons with human immunodeficiency virus infection and CD4 cell counts of 200 per cubic millimeter or less
Background: The efficacy and safety of adding a protease inhibitor to two nucleoside analogues to
treat human immunodeficiency virus type 1 (HIV-1)
infection are not clear. We compared treatment with
the protease inhibitor indinavir in addition to zidovudine
and lamivudine with treatment with the two nucleosides
alone in HIV-infected adults previously treated
with zidovudine.
Methods: A total of 1156 patients not previously
treated with lamivudine or protease inhibitors were
stratified according to CD4 cell count (50 or fewer vs.
51 to 200 cells per cubic millimeter) and randomly
assigned to one of two daily regimens: 600 mg of zidovudine
and 300 mg of lamivudine, or that regimen
with 2400 mg of indinavir. Stavudine could be substituted
for zidovudine. The primary end point was
the time to the development of the acquired immunodeficiency
syndrome (AIDS) or death.
Results: The proportion of patients whose disease
progressed to AIDS or death was lower with indinavir,
zidovudine (or stavudine), and lamivudine (6 percent)
than with zidovudine (or stavudine) and lamivudine
alone (11 percent; estimated hazard ratio,
0.50; 95 percent confidence interval, 0.33 to 0.76;
P�0.001). Mortality in the two groups was 1.4 percent
and 3.1 percent, respectively (estimated hazard
ratio, 0.43; 95 percent confidence interval, 0.19 to
0.99; P=0.04). The effects of treatment were similar
in both CD4 cell strata. The responses of CD4 cells
and plasma HIV-1 RNA paralleled the clinical results.
Conclusions: Treatment with indinavir, zidovudine,
and lamivudine as compared with zidovudine and
lamivudine alone significantly slows the progression
of HIV-1 disease in patients with 200 CD4 cells or
fewer per cubic millimeter and prior exposure to zidovudine.
(N Engl J Med 1997;337:725-33.
Outcomes of Childhood Cholestasis in Alagille Syndrome: Results of a Multicenter Observational Study
Alagille syndrome (ALGS) is an autosomal dominant multisystem disorder with cholestasis as a defining clinical feature. We sought to characterize hepatic outcomes in a molecularly defined cohort of children with ALGS‐related cholestasis. Two hundred and ninety‐three participants with ALGS with native liver were enrolled. Participants entered the study at different ages and data were collected retrospectively prior to enrollment, and prospectively during the study course. Genetic analysis in 206 revealed JAGGED1 mutations in 91% and NOTCH2 mutations in 4%. Growth was impaired with mean height and weight z‐scores of <−1.0 at all ages. Regression analysis revealed that every 10 mg/dL increase in total bilirubin was associated with a decrease in height z‐score by 0.10 (P = 0.03) and weight z‐score by 0.15 (P = 0.007). Total bilirubin was higher for younger participants (P = 0.03) with a median of 6.9 mg/dL for those less than 1 year old compared with a median of 1.3 mg/dL for participants 13 years or older. The median gamma glutamyl transferase also dropped from 612 to 268 in the same age groups. After adjusting for age, there was substantial within‐individual variation of alanine aminotransferase. By 20 years of age, 40% of participants had developed definite portal hypertension. Estimated liver transplant–free survival at the age of 18.5 years was 24%. Conclusions: This is the largest multicenter natural history study of cholestasis in ALGS, demonstrating a previously underappreciated burden of liver disease with early profound cholestasis, a second wave of portal hypertension later in childhood, and less than 25% of patients reaching young adulthood with their native liver. These findings will promote optimization of ALGS management and development of clinically relevant endpoints for future therapeutic trials
Natural History of Liver Disease in a Large International Cohort of Children with Alagille syndrome:Results from The GALA Study
BACKGROUND: Alagille syndrome (ALGS) is a multisystem disorder, characterized by cholestasis. Existing outcome data are largely derived from tertiary centers and real-world data are lacking. This study aimed to elucidate the natural history of liver disease in a contemporary, international, cohort of children with ALGS.METHODS: Multicenter retrospective study of children with a clinically and/or genetically confirmed ALGS diagnosis, born Jan-1997 - Aug-2019. Native liver survival (NLS) and event-free survival rates were assessed. Cox models were constructed to identify early biochemical predictors of clinically evident portal hypertension (CEPH) and NLS.RESULTS: 1433 children (57% male) from 67 centers in 29 countries were included. 10 and 18-years NLS rates were 54.4% and 40.3%. By 10 and 18-years, 51.5% and 66.0% of ALGS children experienced ≥1 adverse liver-related event (CEPH, transplant or death). Children (>6 and ≤12 months) with median total bilirubin (TB) levels between ≥5.0 and <10.0 mg/dL had a 4.1-fold (95% CI 1.6 - 10.8) and those ≥10.0 mg/dL had an 8.0-fold (95% CI 3.4 - 18.4) increased risk of developing CEPH compared with those <5.0 mg/dL. Median TB levels between ≥5.0 and <10.0 mg/dL and >10.0 mg/dL were associated with a 4.8 (95% CI 2.4 - 9.7) and 15.6 (95% CI 8.7 - 28.2) increased risk of transplantation relative to <5.0 mg/dL. Median TB <5.0 mg/dL were associated with higher NLS rates relative to ≥5.0 mg/dL, with 79% reaching adulthood with native liver (p<0.001).CONCLUSIONS: In this large international cohort of ALGS, only 40.3% of children reach adulthood with their native liver. A TB <5.0 mg/dL between 6-and-12-months of age is associated with better hepatic outcomes. These thresholds provide clinicians with an objective tool to assist with clinical decision-making and in the evaluation of novel therapies.</p
Prevalence and architecture of de novo mutations in developmental disorders.
The genomes of individuals with severe, undiagnosed developmental disorders are enriched in damaging de novo mutations (DNMs) in developmentally important genes. Here we have sequenced the exomes of 4,293 families containing individuals with developmental disorders, and meta-analysed these data with data from another 3,287 individuals with similar disorders. We show that the most important factors influencing the diagnostic yield of DNMs are the sex of the affected individual, the relatedness of their parents, whether close relatives are affected and the parental ages. We identified 94 genes enriched in damaging DNMs, including 14 that previously lacked compelling evidence of involvement in developmental disorders. We have also characterized the phenotypic diversity among these disorders. We estimate that 42% of our cohort carry pathogenic DNMs in coding sequences; approximately half of these DNMs disrupt gene function and the remainder result in altered protein function. We estimate that developmental disorders caused by DNMs have an average prevalence of 1 in 213 to 1 in 448 births, depending on parental age. Given current global demographics, this equates to almost 400,000 children born per year
Penilaian Kinerja Keuangan Koperasi di Kabupaten Pelalawan
This paper describe development and financial performance of cooperative in District Pelalawan among 2007 - 2008. Studies on primary and secondary cooperative in 12 sub-districts. Method in this stady use performance measuring of productivity, efficiency, growth, liquidity, and solvability of cooperative. Productivity of cooperative in Pelalawan was highly but efficiency still low. Profit and income were highly, even liquidity of cooperative very high, and solvability was good
Juxtaposing BTE and ATE – on the role of the European insurance industry in funding civil litigation
One of the ways in which legal services are financed, and indeed shaped, is through private insurance arrangement. Two contrasting types of legal expenses insurance contracts (LEI) seem to dominate in Europe: before the event (BTE) and after the event (ATE) legal expenses insurance. Notwithstanding institutional differences between different legal systems, BTE and ATE insurance arrangements may be instrumental if government policy is geared towards strengthening a market-oriented system of financing access to justice for individuals and business. At the same time, emphasizing the role of a private industry as a keeper of the gates to justice raises issues of accountability and transparency, not readily reconcilable with demands of competition. Moreover, multiple actors (clients, lawyers, courts, insurers) are involved, causing behavioural dynamics which are not easily predicted or influenced.
Against this background, this paper looks into BTE and ATE arrangements by analysing the particularities of BTE and ATE arrangements currently available in some European jurisdictions and by painting a picture of their respective markets and legal contexts. This allows for some reflection on the performance of BTE and ATE providers as both financiers and keepers. Two issues emerge from the analysis that are worthy of some further reflection. Firstly, there is the problematic long-term sustainability of some ATE products. Secondly, the challenges faced by policymakers that would like to nudge consumers into voluntarily taking out BTE LEI
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