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Search Results: 1 - 10 of 3136 matches for " Anja-Kerstin Zimmermann "
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Patterns of Multimorbidity in the Aged Population. Results from the KORA-Age Study
Inge Kirchberger, Christa Meisinger, Margit Heier, Anja-Kerstin Zimmermann, Barbara Thorand, Christine S. Autenrieth, Annette Peters, Karl-Heinz Ladwig, Angela D?ring
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0030556
Abstract: Multimorbidity is a common problem in aged populations with a wide range of individual and societal consequences. The objective of the study was to explore patterns of comorbidity and multimorbidity in an elderly population using different analytical approaches. Data were gathered from the population-based KORA-Age project, which included 4,127 persons aged 65–94 years living in the city of Augsburg and its two surrounding counties in Southern Germany. Information on the presence of 13 chronic conditions was collected in a standardized telephone interview and a self-administered questionnaire. Patterns of comorbidity and multimorbidity were analyzed using prevalence figures, logistic regression models and exploratory tetrachoric factor analysis. The prevalence of multimorbidity (≥2 diseases) was 58.6% in the total sample. Hypertension and diabetes (Odds Ratio [OR] 2.95, 99.58% confidence interval [CI] [2.19–3.96]), as well as hypertension and stroke (OR 2.00, 99.58% CI [1.26–3.16]) most often occurred in combination. This association was independent of age, sex and the presence of other conditions. Using factor analysis, we identified four patterns of multimorbidity: the first pattern includes cardiovascular and metabolic diseases, the second includes joint, liver, lung and eye diseases, the third covers mental and neurologic diseases and the fourth pattern includes gastrointestinal diseases and cancer. 44% of the persons were assigned to at least one of the four multimorbidity patterns; 14% could be assigned to both the cardiovascular/metabolic and the joint/liver/lung/eye pattern. Further common pairs were the mental/neurologic pattern combined with the cardiovascular/metabolic pattern (7.2%) or the joint/liver/lung/eye pattern (5.3%), respectively. Our results confirmed the existence of co-occurrence of certain diseases in elderly persons, which is not caused by chance. Some of the identified patterns of multimorbidity and their overlap may indicate common underlying pathological mechanisms.
Tetherin/BST-2 Antagonism by Nef Depends on a Direct Physical Interaction between Nef and Tetherin, and on Clathrin-mediated Endocytosis
Ruth Serra-Moreno ,Kerstin Zimmermann,Lawrence J. Stern,David T. Evans
PLOS Pathogens , 2013, DOI: 10.1371/journal.ppat.1003487
Abstract: Nef is the viral gene product employed by the majority of primate lentiviruses to overcome restriction by tetherin (BST-2 or CD317), an interferon-inducible transmembrane protein that inhibits the detachment of enveloped viruses from infected cells. Although the mechanisms of tetherin antagonism by HIV-1 Vpu and HIV-2 Env have been investigated in detail, comparatively little is known about tetherin antagonism by SIV Nef. Here we demonstrate a direct physical interaction between SIV Nef and rhesus macaque tetherin, define the residues in Nef required for tetherin antagonism, and show that the anti-tetherin activity of Nef is dependent on clathrin-mediated endocytosis. SIV Nef co-immunoprecipitated with rhesus macaque tetherin and the Nef core domain bound directly to a peptide corresponding to the cytoplasmic domain of rhesus tetherin by surface plasmon resonance. An analysis of alanine-scanning substitutions identified residues throughout the N-terminal, globular core and flexible loop regions of Nef that were required for tetherin antagonism. Although there was significant overlap with sequences required for CD4 downregulation, tetherin antagonism was genetically separable from this activity, as well as from other Nef functions, including MHC class I-downregulation and infectivity enhancement. Consistent with a role for clathrin and dynamin 2 in the endocytosis of tetherin, dominant-negative mutants of AP180 and dynamin 2 impaired the ability of Nef to downmodulate tetherin and to counteract restriction. Taken together, these results reveal that the mechanism of tetherin antagonism by Nef depends on a physical interaction between Nef and tetherin, requires sequences throughout Nef, but is genetically separable from other Nef functions, and leads to the removal of tetherin from sites of virus release at the plasma membrane by clathrin-mediated endocytosis.
Impairments of Biological Motion Perception in Congenital Prosopagnosia
Joachim Lange,Marc de Lussanet,Simone Kuhlmann,Anja Zimmermann,Markus Lappe,Pienie Zwitserlood,Christian Dobel
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0007414
Abstract: Prosopagnosia is a deficit in recognizing people from their faces. Acquired prosopagnosia results after brain damage, developmental or congenital prosopagnosia (CP) is not caused by brain lesion, but has presumably been present from early childhood onwards. Since other sensory, perceptual, and cognitive abilities are largely spared, CP is considered to be a stimulus-specific deficit, limited to face processing. Given that recent behavioral and imaging studies indicate a close relationship of face and biological-motion perception in healthy adults, we hypothesized that biological motion processing should be impaired in CP. Five individuals with CP and ten matched healthy controls were tested with diverse biological-motion stimuli and tasks. Four of the CP individuals showed severe deficits in biological-motion processing, while one performed within the lower range of the controls. A discriminant analysis classified all participants correctly with a very high probability for each participant. These findings demonstrate that in CP, impaired perception of faces can be accompanied by impaired biological-motion perception. We discuss implications for dedicated and shared mechanisms involved in the perception of faces and biological motion.
Present status and distribution of the Lynx in the Swiss Alps
Anja Molinari-Jobin,Fridolin Zimmermann,Christine Breitenmoser-Würsten,Simon Capt
Hystrix : the Italian Journal of Mammalogy , 2001, DOI: 10.4404/hystrix-12.2-4174
Abstract: To evaluate the population trend of lynx in the Swiss Alps, we analysed the spatial and numerical development of signs of presence found from 1995 to 1999 and compared them with previous years. Three sources of information on the presence of lynx are available: (1) reports of lynx killed or found dead; (2) records of livestock killed by lynx; (3) records of wild prey remains, tracks, scats, sightings, and vocalisations. We distinguished three levels of reliability: Quality 1 represent the hard facts, e.g. all reports of lynx killed or found dead, photographs of lynx as well as young orphaned lynx caught in the wild and taken into captivity. Quality 2 include all records of livestock killed, wild prey remains, tracks and scats reported by people who have attended special courses, e.g. mainly game wardens. Quality 3 are all wild prey remains and tracks reported by the general public as well as all sightings, scats and vocalisations, e.g. signs that cannot be verified. More than 1600 signs of presence were recorded in the Swiss Alps in this 5-year-period. A high number of quality 1 and 2 records showed that (1) the lynx population in the north-western Swiss Alps increased from 1994 to 1999, that (2) there is a moderate presence of the species in the central and south-western parts and (3) none or hardly any lynx are found in the eastern Alps of Switzerland. Based on a radio-telemetry study and the number of quality 2 data, we were able to estimate the number of lynx in the Swiss Alps at 70 individuals. To counterpart the uneven distribution of lynx in Switzerland, lynx are being translocated from the north-western Alps to the eastern Swiss Alps, as the expansion of the Swiss lynx population is crucial for the conservation of the lynx in the whole Alps.
Active and Healthy Ageing at Work—A Qualitative Study with Employees 55 - 63 Years and Their Managers  [PDF]
Kerstin Nilsson
Open Journal of Social Sciences (JSS) , 2017, DOI: 10.4236/jss.2017.57002
Abstract: The proportion of elderly individuals in the population is increasing in most industrial countries. This demographic change increases the need of more people who work until an older age to maintain the welfare in the states. However, it is not clear if older employees are interested to in generally extend the working life to an older age. It is also not stated if managers in organizations are interested of extending their older employees working life. The overall aim of this study was to examine older employees own experience of their work situation and ageing at work. The aim was also to investigate their managers’ attitude to them as older employees. The investigation was conducted by focusing group interviews with employees aged 55 - 63 years, and with their mangers aged 40 - 63 years. The findings stated that the older employees’ consideration for an extend working life seemed to be based on their health and health problems in relation to their work situation; their personal economy; their managers attitude to them as elderly and the possibility to social inclusion at work; and their possibilities for self-crediting activities at work despite their age. The managers seem to have a positive attitude to some of the older employees’ experience knowledge, if that was in the same direction as their own interest. Otherwise the mangers saw the older employees as problem and obsoleted. The managers were also negative to older employees who got health problems which effect the work production negatively. The older workers in this study described managers’ importance to if they want to work in an extended working life. However, the managers seem not to understand their own importance in this and were not interested to keep all elderly in an extended working life.
The Influence of Work Environmental and Motivation Factors on Seniors’ Attitudes to an Extended Working Life or to Retire. A Cross Sectional Study with Employees 55 - 74 Years of Age  [PDF]
Kerstin Nilsson
Open Journal of Social Sciences (JSS) , 2017, DOI: 10.4236/jss.2017.57003
Abstract: Aim: The aim of this study was to investigate difference between whether individuals think they can work, and want to work until 65 years or not. Methods: A cross/sectional study including survey of 1949 employees aged 55 - 74 years. Results: Working environments were the most significant differences between the groups associated to if the respondents think they can work beyond 65 years or not. Motivation factors were the most significant differences between the groups associated with if the respondents want to work beyond 65 years or not. Conclusions: A satisfying work environment is important to whether people think they can work or not. Nevertheless, whether people want to work is depending on whether the employees are satisfied with the factors that promote their motivation for work. If society wants more people to work until an upper age, it is important to improve both work environmental factors and motivation factors in their work situation.
Expression of the Viral Antigen VP60 in Transgenic Potatoes and its Effect on the Nutritional Composition of Tubers  [PDF]
Heike Mikschofsky, Anja Hartmann, Pawel Janczyk, Günther M. Keil, Patricia K?nig, Horst Schirrmeier, Martin Hammer, Holger Junghans, Kerstin Schmidt, J?rg Schmidtke, Wolfgang B. Souffrant, Manfred Schwerin, Inge Broer
Food and Nutrition Sciences (FNS) , 2011, DOI: 10.4236/fns.2011.22010
Abstract: Recombinant plant-derived pharmaceuticals have been investigated for the last two decades and some products will soon be brought to market. Since veterinary pharmaceuticals seem to be the front-runners of plant-derived vaccines, we selected one model subunit vaccine, the structural capsid protein VP60 against rabbit haemorrhagic disease, and ana-lyzed the expression of three different sequences representing the vp60 open reading frame in potato plants. The gen-eration of antigenic VP60 molecules in the leaf and tuber tissue of potato was tremendously enhanced by replacing virus-derived sequences with plant-optimized codons. In order to identify potentially undesirable alterations in the composition of these genetically modified food components, we studied their nutrient composition and nutritional value in comparison to two parental conventional breeding varieties (Albatros and Desiree). The largest differences in nutrient composition were found between the two conventional breeds and between conventional Desiree and its near-isogenic genetically modified potato plant, indicating that genetic modification as well as conventional breeding can influence nutrient composition. Nevertheless, most parameters of nutritional value seemed to be more affected by conventional breeding than by genetic modification.
Spider Silk Constructs Enhance Axonal Regeneration and Remyelination in Long Nerve Defects in Sheep
Christine Radtke,Christina Allmeling,Karl-Heinz Waldmann,Kerstin Reimers,Kerstin Thies,Henning C. Schenk,Anja Hillmer,Merlin Guggenheim,Gudrun Brandes,Peter M. Vogt
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0016990
Abstract: Surgical reapposition of peripheral nerve results in some axonal regeneration and functional recovery, but the clinical outcome in long distance nerve defects is disappointing and research continues to utilize further interventional approaches to optimize functional recovery. We describe the use of nerve constructs consisting of decellularized vein grafts filled with spider silk fibers as a guiding material to bridge a 6.0 cm tibial nerve defect in adult sheep.
Interactions between Spider Silk and Cells – NIH/3T3 Fibroblasts Seeded on Miniature Weaving Frames
Joern W. Kuhbier,Christina Allmeling,Kerstin Reimers,Anja Hillmer,Cornelia Kasper,Bjoern Menger,Gudrun Brandes,Merlin Guggenheim,Peter M. Vogt
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0012032
Abstract: Several materials have been used for tissue engineering purposes, since the ideal matrix depends on the desired tissue. Silk biomaterials have come to focus due to their great mechanical properties. As untreated silkworm silk has been found to be quite immunogenic, an alternative could be spider silk. Not only does it own unique mechanical properties, its biocompatibility has been shown already in vivo. In our study, we used native spider dragline silk which is known as the strongest fibre in nature.
Recruitment and Activation of RSK2 by HIV-1 Tat
Claudia Hetzer, Dwayne Bisgrove, Michael S. Cohen, Angelika Pedal, Katrin Kaehlcke, Anja Speyerer, Kerstin Bartscherer, Jack Taunton, Melanie Ott
PLOS ONE , 2007, DOI: 10.1371/journal.pone.0000151
Abstract: The transcriptional activity of the integrated HIV provirus is dependent on the chromatin organization of the viral promoter and the transactivator Tat. Tat recruits the cellular pTEFb complex and interacts with several chromatin-modifying enzymes, including the histone acetyltransferases p300 and PCAF. Here, we examined the interaction of Tat with activation-dependent histone kinases, including the p90 ribosomal S6 kinase 2 (RSK2). Dominant-negative RSK2 and treatment with a small-molecule inhibitor of RSK2 kinase activity inhibited the transcriptional activity of Tat, indicating that RSK2 is important for Tat function. Reconstitution of RSK2 in cells from subjects with a genetic defect in RSK2 expression (Coffin-Lowry syndrome) enhanced Tat transactivation. Tat interacted with RSK2 and activated RSK2 kinase activity in cells. Both properties were lost in a mutant Tat protein (F38A) that is deficient in HIV transactivation. Our data identify a novel reciprocal regulation of Tat and RSK2 function, which might serve to induce early changes in the chromatin organization of the HIV LTR.
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