Publications by authors named "Stammler F"

The drastic change in global climate has led to in-depth studies of the geneticresources of native cattle adapted to challenging environments. Native cattle breeds may harbor unique genetic mechanisms that have enabled them adapt to their given environmental conditions. Adipose tissues are key factors in the regulation of metabolism and energy balance and are crucial for the molecular switches needed to adapt to rapid environmental and nutritional changes.

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Reindeer, called caribou in North America, has a circumpolar distribution and all extant populations belong to the same species (). It has survived the Holocene thanks to its immense adaptability and successful coexistence with humans in different forms of hunting and herding cultures. Here, we examine the paternal and maternal history of based on robust Y-chromosomal and mitochondrial DNA (mtDNA) trees representing Eurasian tundra reindeer, Finnish forest reindeer, Svalbard reindeer, Alaska tundra caribou, and woodland caribou.

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Article Synopsis
  • Spontaneous arteriovenous fistulas (AVF) are very rare and often go undiagnosed unless specific risks or symptoms are present.* -
  • An 80-year-old woman experienced swelling and varicosis in her left leg while noticing a cooler right foot, which ultimately led to the discovery of an AVF between her common femoral artery and anterior saphenous vein.* -
  • Despite undergoing treatment for varicosis, the patient declined closure of the AVF; over a 4-year follow-up, she showed no significant complications related to it.*
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Article Synopsis
  • Domestic reindeer are crucial for the culture and economy of indigenous peoples in northern Eurasia, thriving in harsh environments, which highlights the need to understand their genomics for better management and conservation.
  • The study presented a new, highly complete genome assembly for Fennoscandian domestic reindeer, allowing for extensive exploration of genetic diversity and population structure across various reindeer populations in Eurasia.
  • Results revealed four main genetic clusters among reindeer populations, indicating two separate domestication processes and showing genetic distinctions, especially with the Finnish forest reindeer identified as a unique subspecies.
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Background: Altered hemodynamics in liver disease often results in overestimation of glomerular filtration rate (GFR) by creatinine-based GFR estimating (eGFR) equations. Recently, we have validated a novel eGFR equation based on serum myo-inositol, valine, and creatinine quantified by nuclear magnetic resonance spectroscopy in combination with cystatin C, age and sex (GFR). We hypothesized that GFR could improve chronic kidney disease (CKD) classification in the setting of liver disease.

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Introduction: Cystic adventitial degeneration (CAD) is a rare vascular disease, affects mostly middle-aged men, and as a nonatherosclerotic disease, is an uncommon differential diagnosis of intermittent claudication.

Case History: A 56-year-old female patient presented to our medical office because of unexplained right-sided calf pain that was not constantly load-dependent. The complaints fluctuated considerably with longer symptom-free intervals.

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Background: Close monitoring of glomerular filtration rate (GFR) is essential for the management of patients post kidney transplantation. Measured GFR (mGFR), the gold standard, is not readily accessible in most centers. Furthermore, the performance of new estimated GFR (eGFR) equations based upon creatinine and/or cystatin C have not been validated in kidney transplant patients.

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Accurate and precise monitoring of kidney function is critical for a timely and reliable diagnosis of chronic kidney disease (CKD). The determination of kidney function usually involves the estimation of the glomerular filtration rate (eGFR). We recently reported the clinical performance of a new eGFR equation (GFR) based on the nuclear magnetic resonance (NMR) measurement of serum myo-inositol, valine, and creatinine, in addition to the immunoturbidometric quantification of serum cystatin C, age and sex.

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Assessment of renal function relies on the estimation of the glomerular filtration rate (eGFR). Existing eGFR equations, usually based on serum levels of creatinine and/or cystatin C, are not uniformly accurate across patient populations. In the present study, we expanded a recent proof-of-concept approach to optimize an eGFR equation targeting the adult population with and without chronic kidney disease (CKD), based on a nuclear magnetic resonance spectroscopy (NMR) derived 'metabolite constellation' (GFR).

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Reindeer (Rangifer tarandus) are semi-domesticated animals adapted to the challenging conditions of northern Eurasia. Adipose tissues play a crucial role in northern animals by altering gene expression in their tissues to regulate energy homoeostasis and thermogenic activity. Here, we perform transcriptome profiling by RNA sequencing of adipose tissues from three different anatomical depots: metacarpal (bone marrow), perirenal, and prescapular fat in Finnish and Even reindeer (in Sakha) during spring and winter.

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Motivation: In biomedicine, every molecular measurement is relative to a reference point, like a fixed aliquot of RNA extracted from a tissue, a defined number of blood cells, or a defined volume of biofluid. Reference points are often chosen for practical reasons. For example, we might want to assess the metabolome of a diseased organ but can only measure metabolites in blood or urine.

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Temperature is increasing in Arctic and sub-Arctic regions at a higher rate than anywhere else in the world. The frequency and nature of precipitation events are also predicted to change in the future. These changes in climate are expected, together with increasing human pressures, to have significant impacts on Arctic and sub-Arctic species and ecosystems.

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Background: Next-generation 16S ribosomal RNA gene sequencing is widely used to determine the relative composition of the mammalian gut microbiomes. However, in the absence of a reference, this does not reveal alterations in absolute abundance of specific operational taxonomic units if microbial loads vary across specimens.

Results: Here we suggest the spiking of exogenous bacteria into crude specimens to quantify ratios of absolute bacterial abundances.

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Intestinal dysbiosis has been associated with acute gastrointestinal GvHD and poor outcome following allogeneic stem cell transplantation (ASCT). To assess the effect of a switch in 2012 from ciprofloxacin/metronidazole to rifaximin for gut decontamination on intestinal microbiota composition and ASCT outcome, we retrospectively analyzed 394 patients receiving ASCT from September 2008 through June 2015. In 131 and 90 patients, respectively, urinary 3-indoxyl sulfate levels and intestinal enterococcal load were measured before conditioning and weekly within the first 28 days after ASCT.

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Indole, which is produced from l-tryptophan by commensal bacteria expressing tryptophanase, not only is an important intercellular signal in microbial communities, but also modulates mucosal barrier function and expression of pro- and anti-inflammatory genes by intestinal epithelial cells. Here, we hypothesized that decreased urinary excretion of 3-indoxyl sulfate (3-IS), the major conjugate of indole found in humans, may be a marker of gut microbiota disruption and increased risk of developing gastrointestinal (GI) graft-versus-host-disease. Using liquid chromatography/tandem mass spectrometry, 3-IS was determined in urine specimens collected weekly within the first 28 days after allogeneic stem cell transplantation (ASCT) in 131 patients.

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Snow conditions play an important role for reindeer herding. In particular, the formation of ice crusts after rain-on-snow (ROS) events or general surface thawing with subsequent refreezing impedes foraging. Such events can be monitored using satellite data.

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Tundra ecosystems are vulnerable to hydrocarbon development, in part because small-scale, low-intensity disturbances can affect vegetation, permafrost soils, and wildlife out of proportion to their spatial extent. Scaling up to include human residents, tightly integrated arctic social-ecological systems (SESs) are believed similarly susceptible to industrial impacts and climate change. In contrast to northern Alaska and Canada, most terrestrial and aquatic components of West Siberian oil and gas fields are seasonally exploited by migratory herders, hunters, fishers, and domesticated reindeer (Rangifer tarandus L.

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Background: Colour Doppler sonography (CDS) is an established technique in the diagnosis of giant-cell (temporal) arteritis (GCA). The predictive value of its diagnostic criteria for GCA (halo sign or stenosis) is related to the pretest probability (PTP), a measure of probability of presence of a target disease before the result of a diagnostic test is known.

Patients And Methods: A total of 182 (average age 69 years, 69% women) patients of the Rheumatology Center Baden-Württemberg were investigated.

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History And Admission Findings: A 48-year-old right handed gardener presented with a white discoloration and numbness of her left ring finger. She reported cutting her roses without protection gloves so repetitive scratchy lesions especially of her left hand occurred.

Investigations: On examination the pulse of the left radial artery was absent.

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History: A 63-year-old man, known to have Bechterev's disease was admitted because of weight gain and nocturnal sweating. He also had signs of heart failure with progressive exertional dyspnoea. Many months previously numerous bleedings had occurred in the skin, predominantly the face (periorbital and perioral), the inguinal region and the penis.

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History And Findings: A 38-year-old woman, in her 13th week of pregnancy, presented for angiological investigation of repeated episodes of pain in the right index finger. She also reported painful paleness of the right nipple evoked particularly by cold. This was her fifth pregnancy; she had miscarried twice.

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Early diagnosis and treatment of deep venous thrombosis (DVT) in the leg is of decisive importance, in particular in view of the potentially life-threatening complication of pulmonary embolism. The establishment of the diagnosis if often difficult since in the early stage symptoms may be non-existent or few (50%). The most important therapeutic measure is compression.

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History And Admission Findings: A 57-year-old woman, a heavy smoker and migraine sufferer, was admitted with severe resting pain in the right forefoot and painful localized tendril-shaped reddening on the right thigh. She had regularly been taking 1-2 mg ergotamine tartrate, several analgesics, some containing caffeine, and selective serotonin-uptake inhibitors. Clinical examination found all limbs to be cool.

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