Refine
Year of publication
Document Type
- Article (27)
- Doctoral Thesis (1)
Has Fulltext
- yes (28)
Is part of the Bibliography
- no (28)
Keywords
- - (14)
- epidemiology (3)
- metabolomics (3)
- obesity (3)
- Alzheimer’s disease (2)
- Epidemiology (2)
- periodontitis (2)
- 3,5-Diiodothyronine (1)
- 6-min-walk-test (1)
- Abdominal fat (1)
Institute
- Kliniken und Polikliniken für Innere Medizin (8)
- Institut für Klinische Chemie und Laboratoriumsmedizin (5)
- Klinik für Psychiatrie und Psychotherapie (5)
- Institut für Community Medicine (3)
- Institut für Immunologie u. Transfusionsmedizin - Abteilung Immunologie (2)
- Klinik und Poliklinik für Neurologie (2)
- Zentrum für Zahn-, Mund- und Kieferheilkunde (2)
- Institut für Diagnostische Radiologie und Neuroradiologie (1)
- Institut für Epidemiologie u. Sozialmedizin (1)
- Institut für Immunologie u. Transfusionsmedizin - Abteilung Transfusionsmedizin (1)
Publisher
- MDPI (8)
- Wiley (5)
- S. Karger AG (4)
- Frontiers Media S.A. (3)
- SAGE Publications (2)
- Springer Nature (2)
- BioMed Central (BMC) (1)
- Nature Publishing Group (1)
The Study of Health in Pomerania (SHIP), a population-based study from a rural state in northeastern Germany with a relatively poor life expectancy, supplemented its comprehensive examination program in 2008 with whole-body MR imaging at 1.5 T (SHIP-MR). We reviewed more than 100 publications that used the SHIP-MR data and analyzed which sequences already produced fruitful scientific outputs and which manuscripts have been referenced frequently. Upon reviewing the publications about imaging sequences, those that used T1-weighted structured imaging of the brain and a gradient-echo sequence for R2* mapping obtained the highest scientific output; regarding specific body parts examined, most scientific publications focused on MR sequences involving the brain and the (upper) abdomen. We conclude that population-based MR imaging in cohort studies should define more precise goals when allocating imaging time. In addition, quality control measures might include recording the number and impact of published work, preferably on a bi-annual basis and starting 2 years after initiation of the study. Structured teaching courses may enhance the desired output in areas that appear underrepresented.
Das Immunsystem hat die Aufgabe körperfremde von körpereigenen Strukturen zu unterscheiden. Es gewährt dem Organismus die spezifische Abwehr gegenüber krankheitsauslösenden Strukturen (Bakterien, Viren, Gifte). In seiner Komplexität führen Fehlfunktionen des Immunsystems zu verschiedenen Erkrankungen. Richtet sich die Immunantwort gegen körpereigene Strukturen und versagt die Unterscheidung zwischen Eigen und Fremd, so spricht man von Autoimmunerkrankungen. Die vorliegende Arbeit beschäftigte sich mit der Epidemiologie von (1) Allergien und (2) Autoimmunerkrankungen der Schilddrüse (AIT). (1) Parodontitis und Allergien HINTERGRUND: Parodontitis ist eine unter Erwachsenen weit verbreitete lokale, orale Infektion, die systemische Auswirkungen hat. In der Ätiologie von Allergien wird seit den 80iger Jahren die sogenannte Hygiene-Hypothese diskutiert. Diese besagt, dass Infektionen im Kindesalter präventiv auf die Entstehung von Allergien wirken. In der vorliegenden Studie wurde der Zusammenhang zwischen Parodontitis und allergischen Erkrankungen (Heuschnupfen, Hausstauballergie und Asthma) in der Allgemeinbevölkerung Vorpommerns und einem Diabetes mellitus Typ 1 Patientenkollektiv untersucht. METHODEN: Für die erste Analyse wurden Daten von 2837 Männern und Frauen im Alter zwischen 20 und 59 Jahren aus der bevölkerungsrepräsentativen „Study of Health in Pomerania“ (SHIP) herangezogen. Das Diabetes mellitus Typ 1 Patientenkollektiv beinhaltete 170 Patienten im Alter zwischen 17 und 80 Jahren. Der Attachmentverlust (AV) wurde gemessen und das Ausmaß der Parodontitis mittels des Prozentsatzes an Fläche mit einem AV über 3mm erfasst (gesunder Parodontalstatus, geringer AV, moderater AV, schwerwiegender AV). ERGEBNISSE: In SHIP berichteten 326 Personen Heuschnupfen, 111 Personen eine Hausstauballergie und 114 Personen waren von Asthma betroffen. In dem untersuchten Diabetes mellitus Typ 1 Patientenkollektiv litten 22 Patienten an mindestens einer der drei allergischen Erkrankungen. In SHIP wurde nach Kontrolle für ausgewählte Konfounder ein inverser Zusammenhang zwischen dem Schweregrad der Parodontitis und dem Vorhandensein von Heuschnupfen sowie Hausstauballergie gefunden. Mit steigendem AV nahm die Wahrscheinlichkeit für Heuschnupfen (ptrend<0,05) und Hausstauballergie (ptrend<0,05) ab. Hinsichtlich Asthma zeigte sich kein signifikanter Trend (ptrend=0,11), jedoch konnte auch hier mit steigendem AV eine gleichzeitige Abnahme der Wahrscheinlichkeit für das Auftreten von Asthma beobachtet werden. Die Analysen im Diabetes mellitus Typ 1 Patientenkollektiv bestätigten diese Ergebnisse. Auch hier nahm die Wahrscheinlichkeit für das Auftreten einer Allergie mit zunehmenden AV ab. FAZIT: Sowohl in der Allgemeinbevölkerung Vorpommerns als auch in Diabetes mellitus Typ 1 Patienten wurde eine inverse Assoziation zwischen dem Parodontalstatus und allergischen Erkrankungen dargelegt. Diese Ergebnisse befürworten die Hygiene-Hypothese. (2) Anzahl an Schwangerschaften und AIT HINTERGRUND: Frauen sind häufiger von AIT betroffen als Männer. Darüber hinaus ist bekannt, dass das Risiko für einen AIT während der Schwangerschaft und in der Post-Partum-Periode steigt. Das Ziel der Analysen war es, die Assoziation zwischen der Anzahl an Schwangerschaften und AIT zu untersuchen. METHODEN: Daten von 2837 Frauen im Alter zwischen 20 und 79 Jahren aus der bevölkerungsrepräsentativen „Study of Health in Pomerania“ (SHIP) wurden analysiert. Serum Anti-Thyreoperoxidase-Antikörper (anti-TPO) und Thyrotropin Titer wurden bestimmt. Weiterhin wurde eine Schilddrüsensonographie durchgeführt. Eine AIT lag beim gleichzeitigen Vorliegen eines echoarmen Schilddrüsenmusters und eines positiven anti-TPO Titers (>200 IU/ml) vor. ERGEBNISSE: Multivariable Zusammenhangsanalysen zeigten, dass die Chance für eine AIT (OR 4,7 [95%-KI 1,4-15,6], p<0,05) bei Frauen mit mindestens einer Schwangerschaft im Vergleich zu Frauen, die niemals schwanger waren, erhöht war. Ähnliche Ergebnisse zeigten sich auch für ein echoarmes Schilddrüsenmuster (OR 1,7 [95%-KI 1,0-2,8], p<0,05) und positive anti-TPO Werte (OR 1,9 [95%-KI 1,0-3,3], p<0,05). FAZIT: In der untersuchten Studienpopulation stieg das Risiko für eine AIT mit dem Durchleben der ersten Schwangerschaft an.
Background: Abdominal obesity is a major driver for adverse medical conditions. While an interaction between adipose tissue and thyroid function is thought to exist, to our knowledge, no study has examined the effect of thyroid-stimulating hormone (TSH) on visceral adipose tissue (VAT) in a population-based context. Objective: We determined an association between serum TSH levels and VAT. Methods: A sample of 1,021 female and 956 male adults aged 20-79 years was drawn from registry offices in the cross-sectional, population-based Study of Health in Pomerania Trend (SHIP Trend) in Northeast Germany from 2008 to 2012. Our main exposure was serum TSH levels. Our main outcome was VAT measured using magnetic resonance imaging. The possibly mediating role of leptin on the TSH-VAT association was also assessed. Results: A total of 1,719 participants (87.9%) had serum TSH levels within the reference range. The mean volume of VAT was 5.33 liters for men and 2.83 liters for women. No association between TSH and VAT (β = 0.06, 95% CI: -0.02, 0.14) was observed, and there were no differences detected between sexes. VAT was strongly associated with leptin with a greater effect in women than in men. Leptin was strongly associated with TSH. Conclusions: No association between TSH and VAT was observed. Other biomarkers such as leptin may play a role in the relationship between thyroid function and metabolic risk.
Background: Hyperthyroidism is known to induce a hypercoagulable state. It stimulates plasma levels of procoagulative factors and reduces fibrinolytic activity. So far most of the data have been derived from patients with endogenous hyperthyroidism with a wide variability in the underlying pathogenesis and severity of the disease. Objectives: In this study we experimentally induced thyrotoxicosis in healthy volunteers to explore the effects of thyroxine excess on the plasma proteome. Using a shotgun proteomics approach, the abundance of plasma proteins was monitored before, during and after thyrotoxicosis. Methods: Sixteen healthy male subjects were sampled at baseline, 4 and 8 weeks under 250 µg/day thyroxine p.o., as well as 4 and 8 weeks after stopping the application. Plasma proteins were analyzed after depletion of 6 high-abundance proteins (MARS6) by LC-ESI-MS/MS mass spectrometry. Mass spectrometric raw data were processed using a label-free, intensity-based workflow. Subsequently, the linear dependence between protein abundances and fT<sub>4</sub> levels were calculated using a Pearson correlation. Results: All subjects developed biochemical thyrotoxicosis, and this effect was reversed within the first 4 weeks of follow-up. None of the volunteers noticed any subjective symptoms. Levels of 10 proteins involved in the coagulation cascade specifically correlated with fT<sub>4</sub>, supporting an influence of thyroid hormone levels on blood coagulation even at nonpathological levels. Conclusions: The results suggest that experimental thyrotoxicosis exerts selective and specific thyroxine-induced effects on coagulation markers. Our study design allows assessment of thyroid hormone effects on plasma protein levels without secondary effects of other diseases or therapies.
Background: Chronic kidney disease (CKD) and low serum total testosterone (TT) concentrations are independent predictors of mortality risk in the general population, but their combined potential for improved mortality risk stratification is unknown. Methods: We used data of 1,822 men from the population-based Study of Health in Pomerania followed- up for 9.9 years (median). The direct effects of kidney dysfunction (estimated glomerular filtration rate <60 ml/min/ 1.73 m<sup>2</sup>), albuminuria (urinary albumin-creatinine ratio ≧2.5 mg/mmol) and their combination (CKD) on all-cause and cardiovascular mortality were analyzed using multivariable Cox regression models. Serum TT concentrations below the age-specific 10th percentile (by decades) were considered low and were used for further risk stratification. Results: Kidney dysfunction (hazard ratio, HR, 1.40; 95% confidence interval, CI, 1.02–1.92), albuminuria (HR, 1.38; 95% CI, 1.06–1.79), and CKD (HR, 1.42; 95% CI, 1.09–1.84) were associated with increased all-cause mortality risk, while only kidney dysfunction (HR, 2.01; 95% CI, 1.21–3.34) was associated with increased cardiovascular mortality risk after multivariable adjustment. Men with kidney dysfunction and low TT concentrations were identified as high-risk individuals showing a more than 2-fold increased all-cause mortality risk (HR, 2.52; 95% CI, 1.08–5.85). Added to multivariable models, nonsignificant interaction terms suggest that kidney dysfunction and low TT are primarily additive rather than synergistic mortality risk factors. Conclusion: In the case of early loss of kidney function, measured TT concentrations might help to detect high-risk individuals for potential therapeutic interventions and to improve mortality risk assessment and outcome.
Context: 3,5-Diiodo-<smlcap>L</smlcap>-thyronine (3,5-T<sub>2</sub>) is a thyroid hormone metabolite which exhibited versatile effects in rodent models, including the prevention of insulin resistance or hepatic steatosis typically forced by a high-fat diet. With respect to euthyroid humans, we recently observed a putative link between serum 3,5-T<sub>2</sub> and glucose but not lipid metabolism. Objective: The aim of the present study was to widely screen the urine metabolome for associations with serum 3,5-T<sub>2</sub> concentrations in healthy individuals. Study Design and Methods: Urine metabolites of 715 euthyroid participants of the population-based Study of Health in Pomerania (SHIP-TREND) were analyzed by <sup>1</sup>H-NMR spectroscopy. Multinomial logistic and multivariate linear regression models were used to detect associations between urine metabolites and serum 3,5-T<sub>2</sub> concentrations. Results: Serum 3,5-T<sub>2</sub> concentrations were positively associated with urinary levels of trigonelline, pyroglutamate, acetone and hippurate. In detail, the odds for intermediate or suppressed serum 3,5-T<sub>2</sub> concentrations doubled owing to a 1-standard deviation (SD) decrease in urine trigonelline levels, or increased by 29-50% in relation to a 1-SD decrease in urine pyroglutamate, acetone and hippurate levels. Conclusion: Our findings in humans confirmed the metabolic effects of circulating 3,5-T<sub>2</sub> on glucose and lipid metabolism, oxidative stress and enhanced drug metabolism as postulated before based on interventional pharmacological studies in rodents. Of note, 3,5-T<sub>2</sub> exhibited a unique urinary metabolic profile distinct from previously published results for the classical thyroid hormones.
Microbial metabolites measured using NMR may serve as markers for physiological or pathological host–microbe interactions and possibly mediate the beneficial effects of microbiome diversity. Yet, comprehensive analyses of gut microbiome data and the urine NMR metabolome from large general population cohorts are missing. Here, we report the associations between gut microbiota abundances or metrics of alpha diversity, quantified from stool samples using 16S rRNA gene sequencing, with targeted urine NMR metabolites measures from 951 participants of the Study of Health in Pomerania (SHIP). We detected significant genus–metabolite associations for hippurate, succinate, indoxyl sulfate, and formate. Moreover, while replicating the previously reported association between hippurate and measures of alpha diversity, we identified formate and 4-hydroxyphenylacetate as novel markers of gut microbiome alpha diversity. Next, we predicted the urinary concentrations of each metabolite using genus abundances via an elastic net regression methodology. We found profound associations of the microbiome-based hippurate prediction score with markers of liver injury, inflammation, and metabolic health. Moreover, the microbiome-based prediction score for hippurate completely mediated the clinical association pattern of microbial diversity, hinting at a role of benzoate metabolism underlying the positive associations between high alpha diversity and healthy states. In conclusion, large-scale NMR urine metabolomics delivered novel insights into metabolic host–microbiome interactions, identifying pathways of benzoate metabolism as relevant candidates mediating the beneficial health effects of high microbial alpha diversity.
Background
Lower cortisol concentrations in adulthood were repeatedly associated with more severe childhood maltreatment. Additionally, childhood maltreatment was reported to promote health risk behavior, such as smoking or alcohol consumption, and to increase the risk of mental and somatic diseases during adulthood, such as major depressive disorders or obesity. The present study investigated if health risk behavior and disease symptoms in adults mediate the associations between past childhood maltreatment and present basal serum cortisol concentrations.
Methods
Data from two independent adult cohorts of the general population-based Study of Health in Pomerania (SHIP-TREND-0: N = 3,517; SHIP-START-2: N = 1,640) was used. Childhood maltreatment was assessed via the Childhood Trauma Questionnaire (CTQ). Cortisol concentrations were measured in single-point serum samples. Health risk behavior and mental and physical symptoms were used as mediators. Mediation analyses were calculated separately for both cohorts; results were integrated via meta-analyses.
Results
In mediator-separated analyses, associations between childhood maltreatment and basal serum cortisol concentrations were partly mediated by depressive symptoms (BDI-II: βindirect effect = -.011, pFDR = .017, 21.0% mediated) and subjective somatic health complaints (somatic complaints: βindirect effect = -.010, pFDR = .005, 19.4% mediated). In the second step, both mediators were simultaneously integrated into one mediation model. The model replicated the mediation effects of the subjective somatic health complaints (whole model: βindirect effect = -.014, p = .001, 27.6% mediated; BDI-II: βindirect effect = -.006, p = .163, 11.4% mediated, somatic complaints: βindirect effect = -.020, p = .020, 15.5% mediated).
Conclusion
The results support the hypothesis that the long-lasting effects of childhood maltreatment on the stress response system are partly mediated through self-perceived disease symptoms. However, no mediation was found for health risk behavior or physically measured mediators. Mediation models with multiple simultaneous mediators pointed to a relevant overlap between the potential mediators. This overlap should be focused on in future studies.