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Background: Demographic changes are leading to a rapid increase in the number and proportion of the elderly. This goes along with an increase of prevalence of age-associated illnesses, such as dementia. The prevalence of dementia is estimated to amount to 1.5 million in Germany. Up to three-quarter of the persons with dementia (PWD) were living in their own homes. In European countries, dementia is associated with substantial and increasing healthcare costs, which makes dementia one of the most expensive diseases in old age and a serious health care priority. Whereas analyses of total healthcare costs in dementia have been the focus of various cost-of-illness (COI) studies, so far little is known about several cost categories in detail. Firstly, detailed economic analyses of medication cost are currently still missing. Secondly, it is well known that dementia is under-diagnosed, but there is a lack of knowledge about the differences in resource utilization and its costs between dementia patients with and those without a formal dementia diagnosis. Finally, analyses that take the utilization and costs of professional formal and unpaid informal care as well as caregiver’s productivity losses into a consideration are currently missing. Objectives: (1) To determine medication cost, cost per drug and number of drugs taken and analyze their associated factors; to estimate the current price reduction of anti-dementia drugs due to implementation of low-priced generics. (2) To determine health care resource utilisation and costs of patients with a formal diagnosis and those without a formal diagnosis of dementia, and to analyse the association between having received a formal dementia diagnosis and health care costs (3) To determine the utilization and costs of formal and informal care for PwD, indirect costs because of productivity losses of caregivers and the associations between cost, socio-demographic and clinical variables. Methods: The present study is a cross-sectional analysis of health care resource utilization and health care cost of community-dwelling PWD in primary care. Analyses are based on primary data from the ongoing DelpHi-MV trial (Dementia: Life- and person-centered help in Mecklenburg-Western Pomerania, Germany), a population-based, cluster-randomized, controlled intervention trial in the primary care setting (Clinical Trials gov. Identifier: NCT01401582). Eligible patients (older than 70 years, living at home) were screened in participating general practitioner practices for dementia using the DemTect. The utilization of healthcare resources was assessed within the baseline assessment at practitioner’s homes. Costs were calculated from the perspective of the statutory health insurance or the social perspective. Factors associated with healthcare cost were evaluated using multiple regression models. Results: (1) Medication cost and cost per drug were higher and the number of taken drugs lower in advanced stages of cognitive impairment. Prescription of anti-dementia generics could decrease overall medication cost by 28%. Medication cost was associated with number of diagnoses, deficits in activities of daily living and age. Dementia severity was related to cost per drug and number of drugs taken. (2) Patients formally diagnosed with dementia were treated significantly more often by a neurologist, but less often by all other outpatient specialists, and received anti-dementia drugs and day care more often. Diagnosed patients underwent shorter and less frequent planned in-hospital treatments. Dementia diagnosis was significantly associated with higher costs of anti-dementia drug treatment, but significantly associated with less total medical care costs, which valuated to be € 5,123 compared, to € 5,565 for undiagnosed patients. (3) Formal care were utilized less (26.3%) than informal care (85.1%), resulting in a cost ratio of one to ten (1,646 €; 16,473 €, respectively). In total, 29% of caregivers were employed, and every seventh (14.3%) experienced productivity losses, which corresponded to 1,258 € annually. Whereas increasing deficits in daily living activities were associated with higher formal and higher informal costs, living alone was significantly associated with higher formal care costs and the employment of a caregiver was associated with lower informal care costs. Conclusion: (1) Medication cost increases with the number of diagnoses and growing deficits in activities of daily living and decreases with age. Severely cognitively impaired persons are treated with a small number of high-priced drugs, which could suggest inadequate medication of multimorbid persons. (2) There are no significant differences in total health care cost between diagnosed and undiagnosed patients. Dementia diagnosis is beneficial for receiving cost-intensive anti-dementia drug treatments, but is currently insufficient to ensure adequate non-medication treatment for community-dwelling patients. (3) Informal care contributes the most to total care costs. Living alone is a major cost driver for formal costs because of the lower availability of potential informal care. The availability of informal care is limited and productivity losses are increased when a caregiver is employed.
The thesis deals with ions stored in an electrostatic ion beam trap. In the first part of the thesis the so-called self-synchronization effect is discussed. It is demonstrated that the time a bunch of injected ions is conserved by the self-synchronization effect depends on the number of injected ions. In the second part of the thesis the cooling of small anionic cobalt and copper clusters is addressed. Measurements on anionic copper clusters consisting of four to seven atoms are presented and the decay of hot clusters is observed in order to draw conclusions on the internal temperature and the cooling process itself. Afterwards measurements on Co4- are discussed and a measurement scheme based on laser induced delayed electron emission is presented enabling to monitor the internal energy distribution of the clusters over storage time in a temperature-controlled environment. The cooling of initially hot clusters as well as the heating of initially cold clusters were observed.
Connectivity-Based Predictions of Hand Motor Outcome for Patients at the Subacute Stage After Stroke
(2016)
Background: Connectivity-based predictions of hand motor outcome have been proposed to be useful in stroke patients. We intended to assess the prognostic value of different imaging methods on short-term (3 months) and long-term (6 months) motor outcome after stroke.
Methods: We measured resting state functional connectivity (rsFC), diffusion weighted imaging (DWI) and grip strength in 19 stroke patients within the first days (5–9 days) after stroke. Outcome measurements for short-term (3 months) and long-term (6 months) motor function was assessed by the Motricity Index (MI) of the upper limb and the box and block test (BB). Patients were predominantly mildly affected since signed consent was necessary at inclusion. We performed a multiple stepwise regression analysis to compare the predictive value of rsFC, DWI and clinical measurements.
Results: Patients showed relevant improvement in both motor outcome tests. As expected grip strength at inclusion was a predictor for short- and long-term motor outcome as assessed by MI. Diffusion-based tract volume (DTV) of the tracts between ipsilesional primary motor cortex and contralesional anterior cerebellar hemisphere showed a strong trend (p = 0.05) for a predictive power for long-term motor outcome as measured by MI. DTV of the interhemispheric tracts between both primary motor cortices was predictive for both short- and long-term motor outcome in BB. rsFC was not associated with motor outcome.
Conclusions: Grip strength is a good predictor of hand motor outcome concerning strength-related measurements (MI) for mildly affected subacute patients. Therefore additional connectivity measurements seem to be redundant in this group. Using more complex movement recruiting bilateral motor areas as an outcome parameter, DTV and in particular interhemispheric pathways might enhance predictive value of hand motor outcome.
Abstract
Nanoscale multilayer thin films of W and PC (Polycarbonate) show, due to the great difference of the components’ characteristics, fascinating properties for a variety of possible applications and provide an interesting research field, but are hard to fabricate with low layer thicknesses. Because of the great acoustic mismatch between the two materials, such nanoscale structures are promising candidates for new phononic materials, where phonon propagation is strongly reduced. In this article we show for the first time that W/PC-multilayers can indeed be grown with high quality by pulsed laser deposition. We analyzed the polymer properties depending on the laser fluence used for deposition, which enabled us to find best experimental conditions for the fabrication of high-acoustic-mismatch W/PC multilayers. The multilayers were analyzed by fs pump-probe spectroscopy showing that phonon dynamics on the ps time-scale can strongly be tailored by structural design. While already periodic multilayers exhibit strong phonon localization, especially aperiodic structures present outstandingly low phonon propagation properties making such 1D-layered W/PC nano-structures interesting for new phononic applications.
Comprehensive study of the discharge mode transition in inductively coupled radio frequency plasmas
(2016)
In this contribution, the mode transition of an inductively coupled radio frequency plasma at low pressure is investigated. Therefore, a comprehensive set of plasma diagnostics were applied to determine plasma and processing parameters. Therewith, the plasma kinetics and especially the important elementary processes were studied. Hence, the reason for the mode transition was identified.
The aim of this retrospective observational study is to describe and discuss various complications that can arise after insertion of alloplastic materials in the field of urogynecology that require further surgical interventions in order to manage them or to at least improve the quality of life in those women. We were able to collect data on 77 patients who fulfilled the criteria. Medical history, data of clinical findings, and outcomes were collected and analyzed. The most common complication seen as an indication for resecting slings or meshes was de novo overactive bladder syndrome (40%). Other indications seen were lower urinary tract obstruction or obstructive voiding symptoms (21%), chronic pain (21%), and de novo dyspareunia (13%). 36% of the patients had recurrent symptoms (failure) after insertion of alloplastic materials in the form of urinary incontinence or prolapse, 32% presented with vaginal erosions, 2 women had severe signs of infection with abscess formation, another 3 women had urogenital fistulae. Other rare complications after mesh or sling insertion are perforations of the urinary bladder or urethra. Proper case selection is the key factor. The use of meshes and slings seems justified only in patients with known connective tissue weakness and recurrences after native tissue repair. Otherwise, patients will be exposed to unnecessary risk without any expectable improvement to their quality of life. Most of the complications are mainly caused by wrong and inadequate surgical techniques, wrong indications, or missed diagnosis of the underlying problem. In addition, lack of long-term follow-up is usually the cause behind the negligence towards many complications. Therefore, only experienced physicians should be allowed to perform such procedures, and long-term postoperative follow-up is strongly recommended. As slings and meshes are used for procedures of choice as means to improve quality of life, and not for life threatening situations, there is a need for intensive informed consent. All possible alternatives have to be discussed, as do the pros and cons of selected procedures, even the rare complications. Mesh or sling resection is considered to be an effective solution for the management of such complications. It has shown a high success rate in comparison to conservative treatment, and the majority of patients were satisfied and experienced a big improvement in their quality of life. The most common complication after resection is the recurrence of primary symptoms, either urinary incontinence or prolapse. Major or serious intra- or postoperative complications are very rare. All complications were classified and given a code according to the classification system of the international urogynecological association and the international continence society (IUGA/ICS) on 2011. The applicability and practicability of this code were evaluated, looking for ways to possibly improve it or to identify missing parameters. Many patients had more than one code, a problem that entirely torpedoed the idea of “simple” classification. Some complications are not covered individually in the classification, such as failure and recurrence or overactive bladder syndrome. These complications should be included. Many cases began with the same code, despite having different complications. Further sub-classifications should be considered to enable the reader to easily recognize the complication at hand. Patients who came with complications more than one year after mesh or sling insertion were categorized as (T4), regardless of whether the complication arose after 1 year of after 10. Therefore, sub-classifications in the (T4) category are recommended. The “site” category was not applicable in many cases. Furthermore, it is necessary that the severity of a complication is discernible, and should be mentioned in the code. We did not find any correlation between the code given and patient satisfaction. After re-modification and completion, the IUGA/ICS code could be more practical for clinical use, which would allow for the comparison of complications and make the assessment of adverse effects easier for research purposes.
Heart Failure is currently the most common cardiac disorder and a major public health concern worldwide. The adult mammalian heart harbors a subpopulation of cardiac progenitor cells (CPC) that are capable of improving cardiac function. The scope of this study was to delineate the molecular phenotype of a subpopulation of CPCs characterized by the expression of the stem cells antigen-1 surface marker (Sca-1+) and to further identify molecular alterations occurring under heart failure conditions. In order to understand the underlying cellular mechanisms an integrated approach of proteomics and transcriptomics-based techniques were employed. The first step towards achieving this goal was to unravel the native Sca-1+ cell characteristics of freshly isolated progenitor cells derived from healthy adult murine hearts. The proteome map of Sca-1 cells was established using a gel-based mass-spectrometry (gel LC-MS/MS) approach. For better interpretation, a comparison with the protein profiles of cardiomyocytes and Sca-1- cells obtained under similar experimental conditions was performed. All three cell-types were morphologically different in size and structure, which was also evident from their protein expression profiles. We observed that Sca-1+ cells lack endothelial-like and cardiac contractile phenotypes, unlike Sca-1- cells and cardiomyocytes, respectively. Functional assessment of both protein and gene expression profiles revealed a possible role of Sca-1+ cells in cell adhesion, migration, and proliferation. CPC remain in a dormant state under physiological condition unless challenged by myocardial injury. Previous studies revealed that resident Sca-1+ cells home to the injured myocardium but not to the healthy heart and further differentiate into functional cardiomyocytes. We investigated the molecular background of this behavior of adult Sca-1+ cells under heart failure condition which might provide a better insight into their cardiogenic potential in a pathological milieu. The double transgenic α-myosin heavy chain (MHC)-cyclin T1/Gαq overexpressing mouse was chosen as a model for heart failure. Using the comparative gene expression profiling we could detect the differential regulation of 197 genes with at least a 2-fold difference. Among these BDNF mRNA levels were 5-fold higher in the Sca-1+ cells derived from transgenic mice (Cyc+) in comparison to that of wild-type controls (Wt+). This difference was also observed at protein level. The substantially higher expression of BDNF during heart failure prompted us to investigate its regulatory effect on Sca1+ cells. In this current study we were able to show that small amounts of exogenous BDNF stimulated the migratory potential of Cyc+ cells. This effect was not seen in treated Wt+ cells. Furthermore, pulsed SILAC was employed to monitor BDNF mediated changes following treatment. After BDNF treatment, 58 proteins were differentially regulated of which proteins related to cell proliferation were reduced in level in Cyc+ cells while they displayed increased levels in Wt+ cells. Findings from bromodeoxyuridine (BrdU) assays and immunoblotting indicated that BDNF might initiate a differentiation program by repressing cell proliferation in Cyc+ cells. Taken together, it could be shown that the BDNF effect on protein synthesis of Cyc+ and Wt+ cells varied considerably, suggesting an improvement of the cardiogenic potential of Sca-1+ cells under pathological conditions. Aldosterone levels are known to be elevated during heart failure. In this part of study it was hypothesized that endocrine factors associated with heart failure might influence the migration of CPC, thereby possibly restoring the cardiac function of diseased hearts. It could be shown that high concentrations of aldosterone, similar to those found in the plasma of heart failure patients, induced the migration of Sca-1+ cells by up to 60% when compared to control, while physiological levels had no significant influence. In addition, it could be demonstrated that the aldosterone stimulus led to the activation of the mineralocorticoid receptor (MR) expressed on Sca1+ cells, which in turn facilitated migration. This was supported by application of MR antagonist eplerenone, which significantly reduced the aldosterone-induced increase in cell migration while a glucocorticoid antagonist exhibited no inhibitory effect. Hence, the results support the potential role of aldosterone in the mobilization of CPC. It is currently believed that the beneficial effects of cell-based therapies on cardiac repair are imparted to a large degree via paracrine mechanisms. We therefore focused on understanding the influence of pathophysiological levels of aldosterone on the extracellular environment of Sca-1+ cells. MS-based secretome profiling of cells treated for 24h with aldosterone treatment revealed higher levels of proteins associated with extracellular matrix remodeling and IGF signaling. Additionally, galectin-1 and gelsolin were significantly increased in level under pathological conditions indicating a possible paracrine tissue repair of Sca-1+ cells. To conclude, the global proteome and transcriptome profiles generated here revealed the molecular phenotype of Sca-1+ cells which may be used for future reference. The comparative microarray study provided deeper insight into the endogenous changes in mRNA expression during heart failure and delineated the cardiogenic characteristics of Sca-1+ cells. Moreover, the data presented here shed new light on the potential role of BDNF in regulating the mobilization and proliferation of CPCs. Our study on the influence of aldosterone on the migration and the extracellular proteome of CPCs provided new insights on the beneficial effects of this mineralocorticoid on cardiac cells.
Background: Despite of the remarkable caries reduction in permanent dentition, caries levels of primary teeth has stagnated in Germany. Early Childhood Caries (ECC) or also known as baby bottle tooth decay is the most vulnerable form of caries in young children, but minimal data and information from different German states are available to determine the appropriate preventive programs. Aim: The purpose of the current study is to find the prevalence of ECC among young children in the state of Mecklenburg-Vorpommern (North-East Germany) and to optimize an intervention on ECC prevention in a community setting. In addition to education, fluoride varnish is evaluated on young children with active ECC. Design: In this cross-sectional study, a total of 4283 children living in the state of Mecklenburg-Vorpommern were examined. Four age groups - with an accuracy of one day - were formed as follows: less than one year (n=8), one year (n=293), two years (n=1618) and three years (n=1888). The examination was carried out by community dental service’s examiners whom are calibrated to ECC diagnostic criteria of Robke and Buitkamp (2002), and dmf-t values for caries diagnosis. These data are compared by those of children (n=5355) of same age group for the year 2011-2012. In addition, a structured questionnaire on the starting preventive programme on ECC was filled out by the community dentists and for the city of Greifswald, fluoride varnish (Duraphat®, 5% NaF = 2.26%F, Colgate-Palmolive, Germany) was applied for 32 children previously diagnosed with active ECC (ECC1: n=15, ECC2: n=17). Lesions are identified as active or non active according to texture and luminosity, and oral hygiene index (OHI-S) is measured and re-evaluated at three months follow up. Results: The percentage of children under three years old in 2012-2013 with ECC was comparatively low (4%) which possibly reflects the very young age of the children and a restriction for ECC on the upper incisors. The overall caries prevalence in Mecklenburg-Vorpommern varied from 9% to 15%. Most cavitated lesions are untreated. These results are comparable with the results from other German counties. The interventions of the ECC programme vary considerably among the different counties. There was no significant difference in the oral hygiene index (OHI-S) prior and post fluoride varnish application (p-value = 0.25). The use of fluoride varnish resulted in an 81%, statistically significant decrease of active ECC lesions in Greifswald (p < 0.001). Conclusion: The prevalence of caries among young children was considerable in Mecklenburg-Vorpommern. A preventive intervention in nurseries and fluoride varnish applications for active ECC lesions seems to be a feasible approach in controlling caries in early childhood. However, further quality management and standardization of the program should be reinforced.
This paper reviews the first part of the outcomes of the ORCA Saturday Afternoon Symposium 2014 dealing with ‘caries epidemiology and community dentistry: chances for future improvements in caries risk groups'. After the caries decline in many countries, there are remaining pockets of higher caries levels, mostly in the primary dentition and/or linked to a low socio-economic status (SES). The review into the evidence of caries-preventive measures clearly points to the use of fluorides, especially toothbrushing with fluoridated toothpaste and collective measures such as water fluoridation. In contrast to several unsuccessful high-risk approaches, community and public health programmes seem to be able to ensure a population-wide access and compliance in risk groups. Their simple and evidence-based measures mostly combine regular plaque removal and fluoride applications via toothbrushing, at least for children and adolescents. For the future, the common risk factor approach which addresses associations between oral health, social deprivation, diet, hygiene, smoking, alcohol use and stress should lead to combined efforts with other community health and education specialists. Further engagement with public policy, community leaders and administration is needed in order to strengthen healthy choices and behaviour, e.g. in ‘healthy' schools and kindergartens. It seems advisable that these population programmes also aim at improving upstream factors.
All types of muscles use Ca2+ as their main intracellular messenger. In skeletal muscle fibers abnormal levels of intracellular calcium result in altered contractile properties, altered energy metabolism, and altered gene expression. Moreover, long term failure of normal Ca2+ homeostasis can lead to cell death of muscle fibers by necrosis and apoptosis. Elevations of intracellular Ca2+ levels are more and more regarded as the reason for pathological changes and muscle fiber damage in Duchenne Muscular Dystrophy (DMD). DMD is a severe recessive x-linked muscle disease caused by mutations in the dystrophin gene. The characteristics of DMD are muscle tissue wasting and fibrosis. Both muscle wasting and intracellular Ca2+ are to be reflected in changes of muscle force. Several Ca2+ conducting channels including transient receptor potential (TRP) channels are supposed to account for the abnormal Ca2+ homeostasis in DMD. Gene expressions of TRP channels have been studied in human and mouse skeletal muscle and among others TRPC3, TRPC6 and TRPV4 channels were found to occur in skeletal muscles. The present study followed the hypothesis that TRPC3, TRPC6 and TRPV4 are functional in skeletal muscle fibers and that they contribute to muscular Ca2+ homeostasis. Further, it was assumed that dysfunction of the mentioned TRP channels contributes to abnormal contractile properties and pathology and of dystrophin-deficient muscle. To study Ca2+ changes in mouse skeletal muscle fibers the fluorescent calcium indicator Fura-2 was used. Further, the technique of Mn2+ quench of Fura-2 fluorescence was applied. Muscle force measurements of mouse soleus and diaphragm strips were performed. To elucidate abnormalities of TRP channel function in dystrophin-deficient muscle, muscles and muscle fibers of mdx mice were studied. Hyperforin, an activator of TRPC6 channels elicited increases of calcium levels in wildtype muscle fibers. These increases were partly inhibited by the TRPC6 inhibitor 1-(5-chloronaphthalenesulfonyl) homopiperazine hydrochloride (ML-9). The TRPC3/TPRC6 activator 1-oleoyl-2-acetyl-sn-glycerol (OAG) resulted in increased calcium entry, which was attenuated by ML-9. 2-aminoethoxydiphenylborane (2-APB), an unspecific TRP channel inhibitor, suppressed calcium entry in muscle fibers under basal conditions. In addition, the specific TRPC3 inhibitor Pyr3, strongly inhibited background calcium entry. The TRPV4 activator 4α-phorbol 12,13-didecanoate (4α-PDD) induced significant increased calcium entry and this increase could be inhibited by the TRPV4 inhibitor HC 067047. During muscle force recordings ML-9 significantly inhibited twitches and tetani and accelerated muscle fatigue during sustained repetitive stimulation. The results indicate that TRPC3, TRPC6 and TRPV4 are functionally expressed in mouse muscle fibers. TRPC3 stays active under the basal conditions and contributes to background calcium entry. In contrast, TRPC6 and TRPV4 did not seem to be active at resting conditions, but could be pharmacologically activated. TRPC6 may play a role to counteract the calcium loss under long-term muscle fatigue. Though TRPC3 and C6 play a role for muscular Ca2+ homeostasis, it is unclear whether and how the two channels associate and cross-talk with each other in skeletal muscle cells. In mdx fibers Pyr3 inhibited background calcium influx stronger that in WT fibers, implying a possible over-activation of TRPC3 channels in mdx muscle fibers. At later stages mdx muscle showed marked decrease in force reflecting muscle wasting. Soleus showed moderate decrease and diaphragm showed severe decrease (more than 60%) in force. Resistance to muscle fatigue was shown in mdx soleus muscle when compared with WT soleus muscle. Diaphragm segments of mdx mice showed very strong resistance to muscle fatigue. The results indicate a substantial loss of muscle mass, an increase in oxidative fiber types and a reduction of fast fatigable muscle fibers. It is concluded that the hypothesis of functional expression of TRPC3, TRPC6 and TRPV4 in mouse skeletal muscle has been confirmed. The results give improved knowledge about the relation of Ca2+ homeostasis, mdx pathology and TRP channels. Diaphragms of old mdx mice show severe muscle weakness but the remaining fibers of the diaphragm showed strong fatigue-resistance. The application of a TRPC3 inhibitor may be a promising treatment to prevent high Ca2+ mediated muscle damage in muscular dystrophy.