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101.
Gerhard Triebig Dieter Weltle Helmut Valentin 《International archives of occupational and environmental health》1984,53(3):189-204
Summary A cross-sectional study was performed in order to investigate the influence of chronic lead-exposure on the peripheral nervous system. We examined 148 male workers of a storage battery manufacturing plant, who had been exposed to lead metal and inorganic lead compounds for 1 to 28 years (mean 11 years). Fifteen workers with non-occupational risks of peripheral neuropathy (former diseases, alcohol abuse, medication) were excluded from the study. The investigation program comprised: case history, physical examination, analyses of blood- and urine-samples and determination of maximal motor, mixed and sensory conduction velocity (NCV) of the ulnar and median nerve of the right forearm. Objectively no worker showed any signs of health effects related to lead exposure. The Biological Monitoring included the determination of (1) Blood-lead level (Pb-B), (2) Free erythrocyte porphyrins (FEP), (3) -Aminolevulinic acid dehydratase (ALA-D) and (4) -Aminolevulinic acid in urine (ALA-U). Further time-weighted-average (TWA)-values of Pb-B were calculated on the basis of several determinations over the period 1975–1981. The following actual (TWA) median values resulted: Pb-B 53 g/dl (54 g/dl), ALA-U 5.6 mg/l (8.4 mg/l), FEP 2.0 mg/l (2.0 mg/l). The Biologischer Arbeitsstoff Toleranz Wert (BAT) of 70 g//dl for Pb-B was exceeded in 15 workers (11%), and of 15 mg/l for ALA-U in 30 cases (23%). In comparison with age-matched controls, the lead workers showed a mild slowing of NCV with mean values between 0.8 and 2.0 m/s. Multiple stepwise regression analyses revealed statistically significant correlations between the four NCV and age as well as Pb-B. There were better correlations by using TWA than actual data of Pb-B. Consideration of the results of the regression analyses, together with an evaluation of the individual neurophysiological status as a function of internal lead exposure, a dose-effect-relationship was found only in the case of Pb-B exceeding 70 g/dl. From our study it is concluded that chronic lead exposure resulting in blood-lead levels of below 70 g/dl is no occupational risk causing a functionally significant slowing of nerve conduction velocities.With Grants from the Deutsche Forschungsgemeinschaft, Bonn (Project no. Va 23/19-1) 相似文献
102.
Khalid Ibrahim Bzeizi Richard Smith Ali Albenmousa Madhukar Dama Faisal Aba-Alkhail Rajiv Jalan Dieter Broering 《Transplantation proceedings》2021,53(1):148-158
BackgroundRisk of nephrotoxicity in liver transplant patients on calcineurin inhibitors (CnIs) is a concern. Several controlled trials reported benefit of everolimus (EVR) in minimizing this risk when combined with a reduced CnI dose.BackgroundTo systematically review the efficacy and safety of EVR, alone or with reduced CnI dose, as compared to CnI alone post-liver transplantation.MethodsWe searched MEDLINE, Scopus, and the Cochrane Library for randomized controlled trials comparing EVR- and CnI-based regimens post-liver transplantation. Assessment of studies and data extraction were undertaken independently.ResultsEight studies were selected, describing 769 patients. Cockcroft-Gault GFR was higher at one (P = .05), 3, and 5 years (P = .030) in patients on EVR compared to those receiving CnI therapy. The composite endpoint of efficacy failure was similar between the 2 arms after 1, 3, and 5 years of study. More patients discontinued EVR due to adverse effects in 1 year; however, no difference was noted after 3 or 5 years. A higher rates of proteinuria, peripheral edema, and incisional hernia occurred in patients on EVR.ConclusionsThe analysis confirms noninferiority of EVR and reduced CnI combination. Combination regimen resulted in better renal function compared to standard CnI therapy. 相似文献
103.
104.
Tobias Veit Dieter Munker Jürgen Barton Katrin Milger Teresa Kauke Bruno Meiser Sebastian Michel Michael Zoller Hans Nitschko Oliver T. Keppler Jürgen Behr Nikolaus Kneidinger 《American journal of transplantation》2021,21(10):3449-3455
Letermovir is a new antiviral drug approved for the prophylaxis of CMV infection in allogeneic stem cell transplants. The aim of the study was to assess the therapeutic efficacy of letermovir in difficult to treat CMV infections in lung transplant recipients. All lung transplant recipients between March 2018 and August 2020, who have been treated with letermovir for ganciclovir-resistant or refractory CMV infection were included in the study and analysed retrospectively. In total, 28 patients were identified. CMV disease was present in 15 patients (53.6%). In 23 patients (82.1%), rapid response was noticed, and CMV-viral load could be significantly decreased (>1 log10) after a median of 17 [14–27] days and cleared subsequently in all of these patients. Five patients (17.9%) were classified as non-responder. Thereof, development of a mutation of the CMV UL56 terminase (UL-56-Gen: C325Y) conferring letermovir resistance could be observed in three patients (60%). Common side effects were mild and mostly of gastrointestinal nature. Mild adjustments of the immunosuppressive drugs were mandatory upon treatment initiation with letermovir. In addition to other interventions, letermovir was effective in difficult to treat CMV infections in lung transplant recipients. However, in patients with treatment failure mutation conferring letermovir, resistance should be taken into account. 相似文献
105.
Klaus Hager Uwe Machein Stephan Krieger Dieter Platt Gerhard Seefried Joachim Bauer 《Neurobiology of aging》1994,15(6):771-772
In the present study, interleukin-6(IL-6) and several acute phase proteins were measured in healthy participants (23–87 years of age). A linear correlation between IL-6 and age was established with an increase of 0.016 pg/ml(00.004) per year of life. Whereas CRP remained below 0.5 mg/dl in all participants, an increase with age for fibrinogen and an inverse relation for albumin as well as transferrin were obtained. However, the increase of IL-6 did not correlate with any of these changes. IL-6 associated diseases may therefore occur more often with advancing age, but in healthy participants IL-6 does not explain the changing plasma protein pattern resembling that of an acute phase reaction. 相似文献
106.
Marita Fehn Maura A. Farquharson Doris Sautner Wolfgang Saeger Dieter K. Lüdecke Anne M. McNicol 《The Journal of pathology》1993,169(3):335-339
Pro-opiomelanocortin (POMC) mRNA was demonstrated in pituitary adenomas from 16 patients with Cushing's disease and 10 with Nelson's syndrome. The intensity of signal was significantly greater in Nelson's syndrome than in Cushing's disease and there was a trend towards a greater proportion of positive cells. This probably reflects inhibition of POMC gene expression by the high circulating levels of cortisol in Cushing's disease. In the para-adenomatous gland, the intensity of signal was variable in cells showing Crooke's hyaline change, ranging from negative to strongly positive, in keeping with the functional heterogeneity of corticotrophs. In one case, junctional corticotrophs were present and these were more intensely stained than anterior lobe corticotrophs in the same gland. This supports the concept that these cells are subject to different regulatory influences from corticotrophs in the anterior lobe. Whether this is related to differences in embryological origins or to local factors is at present unclear. 相似文献
107.
Dieter Buck-Gramcko M.D. 《World journal of surgery》1990,14(6):715-724
Treatment of congenital malformations of the hand and forearm has progressed not only from new procedures, but especially due to a new technique, namely microsurgery. Microsurgery enables skilled hand surgeons to operate on the tiny hands of babies without damaging the anatomical structures. The optimal time for the correction of many deformities is during the first 2 years of life. This gives excellent adaptation of the corrected structures to their altered function, especially in combination with a long period of further growth. Several new procedures are described which have been made possible only since the introduction of microsurgery, either by microvascular anastomoses or by meticulous dissection technique (toe transplantation, proximal toe phalanx transplantation, nail wall formation in complex syndactyly, transposition of digital parts in polydactyly and radial club hand).
Resumen El tratamiento de las malformaciones congénitas de la mano y el antebrazo ha progresado no sólo en términos de nuevos procedimientos, sino, especialmente, en razón de una nueva técnica, la microcirugía. La microcirugía permite que los cirujanos de mano idoneos puedan operar sobre las pequeñas manos de bebés sin causar daño a las estructuras anatómicas. La época óptima para la corrección de muchas deformaciones es durante los 2 primeros años de vida. Esto hace posible una excelente adaptatión, de las estructuras que han sido corregidas a la función alterada, especialnmente durante períodos prolongados del crecimiento. Se describen algunos nuevos procedimientos que han sido factibles sólo desde la introducción de la microcirugía, bien sea por anastomosis microvascular o por una meticulosa técnica de disecci [trasplante de un artejo, transplante de la falange proximal, formación de la uña en sindatilia compleja, transposición de partes de dígitos en polidactilia y en mano zamba radial (club hand)].
Résumé Le traitement des malformations congénitales de la main et de l'avant-bras a progressé non seulement grâce à de nouveaux procédés mais surtout grâce à l'apparition de toute une technique nouvelle: la microchirurgie. Celle-ci permet à des chirurgiens de la main expérimentés d'opérer les toutes petites mains des jeunes enfants sans compromettre la fonction des structures anatomiques. Les 2 premières années de la vie sont la meilleure période pour corriger la plupart des malformations: elles permettent une adaptation excellente des structures de fonction auparavant altérée, en se combinant avec la longue période de croissance à venir. Plusieurs procédés nouveaux sont répertoriés. Ils sont devenus possibles seulement depuis l'introduction de la microchirurgie: il s'agit notamment des anastomoses microvasculaires ou des techniques méticuleuses de dissection comme le transfert d'orteil ou de la phalange proximale de l'orteil, la création du mur latéral d'ongle dans un cas de syndactylie complexe ou la transposition de segments des doigts pour polydactylie ou main bote radiale.相似文献
108.
Nausicaa Christodoulou Léa Bertrand Laura Palagini Justine Frija-Masson Marie-Pia d'Ortho Michel Lejoyeux Dieter Riemann Julia Maruani Pierre A. Geoffroy 《Journal of sleep research》2023,32(1):e13752
Insomnia is the most frequent sleep disorder and a public health concern that increased during the Covid 19 pandemic. Fully restrictive lockdowns during Covid are interesting periods to examine the impact of environmental and behavioural changes on the emergence of insomnia symptoms. In this cross-sectional study we aimed to (1) determine the main factors associated with insomnia symptoms during a Covid-19 fully restrictive lockdown examining the associated daily life alterations and (2) create a predictive model of insomnia symptoms. We used the data drawn from the “Covid-RythmE” study that reached volunteers from the general French population through an online survey during the last 2 weeks of the 2 month full lockdown. Associations with insomnia symptoms were tested and significant associations were entered in a Backward Stepwise Logistic Regression (BSLR) to assess the best combination to classify individuals with or without insomnia symptoms. From the 1624 participants, 50.64% suffered from mild to severe insomnia symptoms as assessed by the ISI. The best combination for explaining insomnia symptoms with 74.26% of accuracy included: age (OR = 1.15), females (OR = 1.26), smaller home sizes (OR = 0.77), environmental noises (OR = 1.59), anxiety symptoms (OR = 1.24), depressive symptoms (OR = 1.15), regularity of sleep–wake schedules (OR = 1.25), exposure to screen during the morning (OR = 1.13), and LED light during the evening (OR = 1.17). Thus, lifestyle schedule and exposure to natural synchronizers such as light, are primordial in considering in insomnia physiopathology, prevention and treatment, as well as the associated mental health status. 相似文献
109.
Lisa Ehrlich Doris Pospiech Upenyu L. Muza Albena Lederer Julia Muche Dieter Fischer Petra Uhlmann Felix Tzschöckell Simon Muench Martin D. Hager Ulrich S. Schubert 《Macromolecular chemistry and physics.》2023,224(1):2200317
Organic, solid-state batteries require efficient solid electrolytes able to provide stable ion conduction. Here, solid electrolytes based on ionic liquid (IL) polymers with chloride counterions as electrolyte materials for batteries are presented. Acrylic monomers with imidazolium substituents with alkyl side groups that are linked by alkyl spacers to the acrylic group are employed. The IL monomers with chloride counterions are either converted by thermally initiated radical polymerization into linear homopolymers or incorporated into polymer networks by UV-initiated copolymerization utilizing a bifunctional, non-ionic cross-linker. Both procedures successfully yielded the desired materials, which is confirmed by NMR spectroscopy (linear homopolymers) or Raman spectroscopy (IL networks). The ionic conductivities at room temperature are measured by Electrochemical Impedance Spectroscopy. The ionic conductivities of the linear homopolymers are in the range of 10−4 to 10−6 S cm−1, while those of the IL networks are about two orders of magnitude lower. They increase to 10−4 S cm−1 at 70 °C. The electrochemical stability is examined by Linear Sweep Voltammetry and is proven in the voltage range of −2 to +2 V. The results reveal that the materials represent promising electrolytes for potential solid-state battery applications. 相似文献
110.
Angelika Krämer Wolfgang Saeger Gesche Tallen Dieter K. Lüdecke 《Endocrine pathology》1994,5(4):198-211
To assess the proliferative activity of pituitary adenomas, 36 surgically removed adenomas were studied by light microscopical parameters; mitotic count; expression of PCNA, Ki-67, cathepsin D, and EGF; and image cytometry. Three adenomas (9%) showed high, 11 (34%) medium, 17 (53%) moderate, and 1 (3%) low structural differentiation. In 10 adenomas (31%), no mitosis was observed. The average was 2.4 mitoses/100 HPF; the highest count was 7.1 mitoses/100 HPF. Eleven adenomas (33.3%) were PCNA-negative; in 20 adenomas (60.6%), between 0.05 and 3.9, and in 2 adenomas (6.0%), between 10.5 and 16.4 PCNA-positive nuclei were observed. Only a recurrent null-cell adenoma (9%) was Ki-67-negative. Three adenomas (9.1%) were EGF-negative, 28 (84.8%) showed up to 10% positive cells, and 2 (6.1 %) showed between 10 and 30% positive cells; 19 adenomas (68%) were cathepsin D-negative, including all endocrine-inactive adenomas. Half the adenomas had an euploid DMA stem line. Endocrine-inactive adenomas displayed a higher rate of euploid DNA stem lines than endocrine-active adenomas. The S-phase fraction varied between 2.97 and 28%, with a mean value of 14.4%. Half the adenomas showed an S-phase fraction of 11.65% or lower. 相似文献