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Author: Johannes Beck (80)


Dec
1969

Psychiatric disorders are associated with a higher prevalence of cardiovascular disease and mortality. Regular exercise has been shown to reduce depressive symptoms and improve arterial stiffness as a biomarker of cardiovascular risk. We aimed to investigate the effects of different exercise modalities on depression severity index and arterial stiffness in patients suffering from unipolar depression.

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Jan
2018

Misdiagnosis of early behavioral variant frontotemporal dementia (bvFTD) with major depressive disorder (MDD) is not uncommon due to overlapping symptoms. The aim of this study was to improve the discrimination between these disorders using a novel facial emotion perception task.
In this prospective cohort study (July 2013-March 2016), we compared 25 patients meeting Rascovsky diagnostic criteria for bvFTD, 20 patients meeting DSM-IV criteria for MDD, 21 patients meeting McKhann diagnostic criteria for Alzheimer's disease dementia, and 31 healthy participants on a novel emotion intensity rating task comprising morphed low-intensity facial stimuli.

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Dec
1969

Systematic N-methylated derivatives of the melanocortin receptor ligand, SHU9119, lead to multiple binding and functional selectivity toward melanocortin receptors. However, the relationship between N-methylation-induced conformational changes in the peptide backbone and side chains and melanocortin receptor selectivity is still unknown. We conducted comprehensive conformational studies in solution of two selective antagonists of the third isoform of the melanocortin receptor (hMC3R), namely, Ac-Nle-c[Asp-NMe-His-d-Nal(2')-NMe-Arg-Trp-Lys]-NH(15) and Ac-Nle-c[Asp-His-d-Nal(2')-NMe-Arg-NMe-Trp-NMe-Lys]-NH(17).

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Jun
2017

The reaction of Niacetate tetra-hydrate with 4-methyl-2-(1,2,3,4-tetra-hydro-naphthalen-1-yl-idene)hydrazinecarbo-thio-amide in a 2:1 molar ratio and recrystallization from di-methyl-formamide yielded the title compound, [Ni(CHNS)]·CHNO. The ligands act as monoanionic κ,-donors, forming five-membered metallarings. The Niion is fourfold coordinated in a distorted square-planar-configuration, which is rather uncommon for mono-thio-semicarbazone complexes.

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Apr
2017

By employing the subcomponent self-assembly approach utilizing 5,10,15,20-tetrakis(4-aminophenyl)porphyrin or its zinc(II) complex, 1H-4-imidazolecarbaldehyde, and either zinc(II) or iron(II) salts, we were able to prepare O-symmetric cages having a confined volume of ca. 1300 Å. The use of iron(II) salts yielded coordination cages in the high-spin state at room temperature, manifesting spin-crossover in solution at low temperatures, whereas corresponding zinc(II) salts led to the corresponding diamagnetic analogues.

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Feb
2017

There are two crystallographically independent mol-ecules in the asymmetric unit of the title compound, CHNS, one of them being disordered over the methyl group [site-occupancy ratio = 0.705 (5):0.295 (5)].

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Nov
2016

Features of behavioral variant frontotemporal dementia (bvFTD) such as executive dysfunction, apathy, and impaired empathic abilities are also observed in major depressive disorder (MDD). This may contribute to the reason why early stage bvFTD is often misdiagnosed as MDD. New assessment tools are thus needed to improve early diagnosis of bvFTD.

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Jan
2016

As a new method for the synthesis of chalcogen polycationic clusters, the electrochemical dissolution of elemental tellurium in ionic liquids (IL) or in liquid SO2 is presented. ILs used are ethylmethylimidazolium triflate [OTf](-) and tetraalkylammonium triflylimide [NTf2](-). Tristriflylmethanide [CTf3](-) was used as [BuMeIm][CTf3] as the electrolyte in SO2.

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Dec
1969

In major depression cognitive impairment is common and may persist despite improvement in psychopathology. So far it is unclear how closely related improvement in cognitive functioning is to the clinical course of depression. Further, it is unclear whether recovery from cognitive impairment is linked to changes in serum brain-derived neurotrophic factor (sBDNF).

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Sep
2015

A new polymorph of MnP4 was prepared by reaction of the elements via chemical vapor transport with iodine as transporting agent. The crystal structure was refined using single-crystal diffraction data (space group Cc, no. 9, a = 5.

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Aug
2015

Human melanocortin receptors (hMCRs) have been challenging targets to develop ligands that are explicitly selective for each of their subtypes. To modulate the conformational preferences of the melanocortin ligands and improve the biofunctional agonist/antagonist activities and selectivities, we have applied a backbone N-methylation approach on Ac-Nle-c[Asp-His-D-Nal(2')-Arg-Trp-Lys]-NH2 (Ac-Nle(4)-c[Asp(5),D-Nal(2')(7),Lys(10)]-NH2), a nonselective cyclic peptide antagonist at hMC3R and hMC4R and an agonist at hMC1R and hMC5R. Systematic N-methylated derivatives of Ac-Nle(4)-c[Asp(5),D-Nal(2')(7),Lys(10)]-NH2, with all possible backbone N-methylation combinations, have been synthesized and examined for their binding and functional activities toward melanocortin receptor subtypes 1, 3, 4, and 5 (hMCRs).

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Dec
1969

Under stressful conditions such as in an emergency situation, efficient information processing is essential for reasonable responses.
Virtual Reality (VR) technology is used to induce stress and to test three main cognitive functions for decision making in stressful situations.
A VR task was developed to induce stress following the Trier Social Stress Test (TSST) protocol and two VR cognitive performance tests to measure learning aptitude, spatial orientation and cognitive flexibility.

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May
2015

In the title solvate, C15H15N3O2S·CH3OH, the thio-semicarbazone mol-ecule is approximately planar; the maximum deviation from the mean plane is 0.4659 (14) Å and the dihedral angle between the aromatic rings is 9.83 (8)°.

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Apr
2015

Despite considerably extended knowledge about the mechanism of action of antidepressants, physicians would greatly benefit from reliable biological predictors identifying those patients who will respond poorly to a given treatment. The aim of the present study was to assess whether repeated testing of the cortisol awakening response (CAR) between baseline and after 10 days of duloxetine treatment is able to predict antidepressant treatment outcome after 6 weeks of treatment.
12 patients with a major depressive episode were treated with duloxetine 90 mg/day for 6 weeks.

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Jan
2016

Major depression is a common, recurrent mental illness that affects millions of people worldwide. Recently, a unique fast neuroprotective and antidepressant treatment effect has been observed by ketamine, which acts via the glutamatergic system. Hence, a steady accumulation of evidence supporting a role for the excitatory amino acid neurotransmitter (EAA) glutamate in the treatment of depression has been observed in the last years.

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Jan
2015

The title compound, C11H15N3OS, is a thio-semicarbazone derivative of the raspberry ketone rheosmin [systematic name: 4-(4-hy-droxy-phen-yl)butane-2-one]. The mol-ecule deviates from planarity, with the bridging C-C-C=N torsion angle equal to -101.3 (2)°.

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Dec
1969

Poor sleep is a major health concern, and there is evidence that young adults are at increased risk of suffering from poor sleep. There is also evidence that sleep duration can vary as a function of gender and body mass index (BMI). We sought to replicate these findings in a large sample of young adults, and also tested the hypothesis that a smaller gap between subjective sleep duration and subjective sleep need is associated with a greater feeling of being restored.

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Jan
2015

The reactions of tellurium or selenium with bismuth or antimony in chloridogallate and iodidoaluminate melts in the presence of group 15 trihalides as weak oxidants yielded the compounds (Sb2Te2)[GaCl4] (1), (Sb2Te2)I[AlI4] (2), (Bi2Te2)Cl[GaCl4] (3a), (Bi2Se2)Cl[GaCl4] (3b), (Sb3Te4)[GaCl4] (4), and (SbTe4)[Ga2Cl7] (5). In the crystal structures one-dimensional polymeric cations (Sb2Te2(+))n (1), (Sb2Te2(2+))n (2), (Bi2Te2(2+))n (3a), (Bi2Se2(2+))n (3b), (Sb3Te4(+))n (4), and (SbTe4(+))n (5) are present. The polymeric cationic strands in 2, 3a, 3b, and 4 consist of pentele/chalcogen dumbbells, which are connected to ladder-shaped bands.

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Oct
2014

The reaction of 2-(1,2,3,4-tetra-hydro-napthalen-1-yl-idene)hydrazinecarbo-thio-amide (TTSC) with pyrazine-2,3,5,6-tetra-carbo-nitrile (tetra-cyano-pyrazine, TCNP) yields the title 2:1 charge-transfer adduct, 2C11H12N3S·C6N8. The complete TCNP mol-ecule is generated by a crystallographic inversion centre and the non-aromatic ring in the TTSC mol-ecule adopts an envelope conformation with a methyl-ene C atom as the flap. In the crystal, the thio-semicarbazone mol-ecules are connected through inversion-related pairs of N-H⋯S inter-actions, building a polymeric chain along the b-axis direction.

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Sep
2014

The title compound, C11H21N3S, consists of a menthone moiety attached to an extended thio-semicarbazone group with the N-N-C-N torsion angle being 11.92 (16)°. The cyclo-hexane ring has a chair conformation and the conformation about the C=N bond is E.

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Dec
2014

Preclinical and clinical studies support a role for brain-derived neurotrophic factor (BDNF) in the pathophysiology of stress-related mood disorders. Furthermore, BDNF seems to be linked to antidepressant action. Available pharmacological treatments for depression are characterized by significant limitations with low efficacy and a major delay until treatment response.

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Aug
2014

4-Hy-droxy-3-meth-oxy-benzaldehyde 4-ethyl-thio-semicarbazone.

Acta Crystallogr Sect E Struct Rep Online 2014 Aug 17;70(Pt 8):o868. Epub 2014 Jul 17.
Adriano Bof de Oliveira, Johannes Beck, Jörg Daniels, Bárbara Regina Santos Feitosa
In the crystal structure of the title compound, C11H15N3O2S, the C-N-N-C and C-N-C-C torsion angles involving the benzene ring and ethyl group are 11.91 (15) and 99.4 (2)°, respectively.

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Dec
1969

Two macrocyclic bis(ureas) 1 and 2, both based on diphenylurea, have been synthesized. Compound 1 represents the smaller ring with two ethynylene groups as linkers and 2 the larger ring with two butadiynylene groups. On thermal treatment to 130 °C molecule 1 splits up into two dihydroindoloquinolinone (3) molecules.

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Jul
2014

In the title compound, C12H15N3S, the mol-ecule deviates slightly from planarity, with a maximum deviation from the mean plane of the non-H atoms of 0.2756 (6) Å for the S atom and a torsion angle for the N-N-C-N fragment of -7.04 (16)°.

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Jun
2014

Work-related stress can lead to various health problems ranging from job-related exhaustion to psychiatric and somatic diseases. Biomarkers of job-related exhaustion could help to improve our understanding of the biological mechanisms and might be useful to guide prevention and treatment strategies. The present study included 12 male cases suffering from job-related exhaustion and 12 matched healthy controls.

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Aug
2014

Major depressive disorder has been associated with low serum levels of brain-derived neurotrophic factor (sBDNF), which is functionally involved in neuroplasticity. Although sBDNF levels tend to normalize following psychopathological improvement with antidepressant treatment, it is unclear how closely sBDNF changes are associated with treatment outcome.
To examine whether baseline sBDNF or early changes in sBDNF are predictive of response to therapy.

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Feb
2014

Tetraborides of chromium and manganese exhibit an unusual boron-atom framework that resembles the hypothetical tetragonal diamond. They are believed to be very hard. Single crystals of MnB4 have now been grown.

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Feb
2014

In this work, we report on the reduction of tetracyanoquinodimethane (TCNQ) with dicationic complexes of guanidinyl-functionalized aromatic (GFA) electron donors. In contrast to reduction with free GFAs, milder reduction conditions were achieved, and this led to semiconducting materials with extended TCNQ π stacking. The charge on the TCNQ units was estimated from the structural data obtained by single-crystal X-ray diffraction analysis and from IR spectroscopic data.

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Nov
2013

The bonding mechanism of charged stacks of thianthrene and selenanthrene radical cations is studied using quantum-chemical methods. The investigation of the nature of the electronic ground state and the electronic structure via gas-phase multireference calculations brings insight into the interactions of such dimers and trimers as found in molecular crystals. Since thianthrene and selenanthrene are the dibenzo-homologues of dithiin and diselenin, the latter are taken as model systems to study the influence of the ring systems.

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Nov
2013

Burnout is a work-related syndrome that comprises physical fatigue, emotional exhaustion and cognitive weariness and is considered to be a risk factor for the development of major depression. While cognitive impairments in major depression persist even after remission of mood symptoms, the role of cognitive impairments in burnout is less clear. The hypothesis tested in the present study submits that executive function performance is reduced during burnout compared to healthy subjects but can recover to normal levels.

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Aug
2013

The reaction of elemental Mn, Fe, and Zn with Te in liquid ammonia at 50 °C leads to the polytellurides [Mn(NH3)6]Te4 (1), [Fe(NH3)6]Te4·NH3 (2), and [Zn(NH3)4]2Te15 (3) in quantitative yield for 1 and 3, and in 30-50% yield for 2. The compounds form black crystals, which are air sensitive and easily lose ammonia without a protective atmosphere of NH3. Compound 3 is semiconducting with a thermal activation energy of 1.

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Dec
1969

Restless legs syndrome (RLS) is a disturbing sensorimotor disorder negatively influencing both sleep and psychological functioning. The aim of the present study was to assess RLS patients with respect to locus of control, sleep-related personality traits, quality of life, and sleep as compared to healthy controls.
Thirty-eight patients (18 females and 20 males; mean age: 56.

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Mar
2013

Occupational burnout is associated with severe negative health effects. While stress management programs proved to have a positive influence on the well-being of patients suffering from burnout, it remains unclear whether aerobic exercise alleviates burnout severity and other parameters related to occupational burnout. Therefore, the main purpose of this study was to pilot-test the potential outcomes of a 12-week exercise training to generate hypotheses for future larger scale studies.

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Feb
2013

The reaction of 1-amino-anthraquinone with 7,7',8,8'-tetra-cyano-quinodimethane yielded the title charge-transfer complex, C(14)H(9)NO(2)·C(12)H(4)N(4). The mol-ecules have maximum deviations from the mean planes through the non-H atoms of 0.0769 (14) Å for an oxo O atom and 0.

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Jan
2013

Chromium tetraboride [orthorhombic, space group Pnnm (No. 58), a = 474.65(9) pm, b = 548.

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Dec
1969


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Apr
2013

Sleep electroencephalogram spindles are associated with efficient cortical-subcortical connectivity, and intellectual and learning abilities. In the present study, we assessed healthy preschoolers with a twofold aim: (i) to explore associations of non-rapid eye movement S2 spindles with emotional/behavioural characteristics cross-sectionally; and (ii) longitudinally. A total of 43 children who were 5 years old underwent objective sleep electroencephalogram monitoring in their homes.

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Sep
2012

The reaction of 5-bromo-salicyl-aldehyde thio-semicarbazone with nickel acetate tetra-hydrate and pyridine yielded the title compound, [Ni(C(8)H(6)BrN(3)OS)(C(5)H(5)N)]. The Ni(II) atom is four-coordinated in a square-planar environment by one deprotonated dianionic thio-semicarbazone ligand, acting in a tridentate chelating mode through N, O and S atoms forming two metalla-rings, and by one pyridine mol-ecule. The complex mol-ecules are linked into dimers by pairs of centrosym-metrical N-H⋯N inter-actions.

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Jul
2012

Insufficient oral bioavailability is considered as a key limitation for the widespread development of peptides as therapeutics. While the oral bioavailability of small organic compounds is often estimated from simple rules, similar rules do not apply to peptides, and even the high oral bioavailability that is described for a small number of peptides is not well understood. Here we present two highly Caco-2 permeable template structures based on a library of 54 cyclo(-D-Ala-Ala(5)-) peptides with different N-methylation patterns.

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May
2012

Positive effects on mood have been observed in subjects who underwent treatment of glabellar frown lines with botulinum toxin and, in an open case series, depression remitted or improved after such treatment. Using a randomized double-blind placebo-controlled trial design we assessed botulinum toxin injection to the glabellar region as an adjunctive treatment of major depression. Thirty patients were randomly assigned to a verum (onabotulinumtoxinA, n = 15) or placebo (saline, n = 15) group.

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Nov
2011

1-(5-Nitro-2-oxoindolin-3-yl-idene)thio-semicarbazide.

Acta Crystallogr Sect E Struct Rep Online 2011 Nov 5;67(Pt 11):o2858. Epub 2011 Oct 5.
Katlen C T Bandeira, Leandro Bresolin, Johannes Beck, Jörg Daniels, Adriano Bof de Oliveira
In the title molecule, C(9)H(7)N(5)O(3)S, there is an intramolecular N-H⋯O. The molecule is essentially planar, with the maximum deviation from the mean plane of the 18 non-H atoms being 0.135 (2) Å for the amine N atom.

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Nov
2011

To explore associations between dream recall, gender, sleep, perceived stress, and creativity in a large sample of adolescents. In adults, women report a higher frequency of dream recall than men. Moreover, increased awakenings seem to increase dream recall, whereas low sleep quality is associated with low dream recall.

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Jul
2011

A focused multiply N-methylated library of a cyclic hexapeptidic somatostatin analogue: MK678 cyclo(-MeAYwKVF-) was generated, which resulted in the unexpected observation of an efficacious tetra-N-methylated analogue, cyclo(-MeAYMewMeKVMeF-) with a potent inhibitory action on sensory neuropeptide release in vitro and on acute neurogenic inflammatory response in vivo. The analogue shows selectivity toward somatostatin receptor subtype 2 (sst2). Extensive 2D NMR spectroscopy and molecular dynamics simulation revealed the solution conformation of the analogue, which can be adopted as a lead for the further structure-activity relationship studies targeting neurogenic inflammation.

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Jun
2011

Attempts to prepare the hitherto unknown Se(6)(2+) cation by the reaction of elemental selenium and Ag[A] ([A](-) = [Sb(OTeF(5))(6)](-), [Al(OC(CF(3))(3))(4)](-)) in SO(2) led to the formation of [(OSO)Ag(Se(6))Ag(OSO)][Sb(OTeF(5))(6)](2)1 and [(OSO)(2)Ag(Se(6))Ag(OSO)(2)][Al(OC(CF(3))(3))(4)](2)2a. 1 could only be prepared by using bromine as co-oxidant, however, bulk 2b (2a with loss of SO(2)) was accessible from Ag[Al(OC(CF(3))(3))(4)] and grey Se in SO(2) (chem. analysis).

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Apr
2012

Sleep EEG spindles are linked to efficient cortical-subcortical connectivity and intellectual abilities. The aim of the present study was to investigate the relationship of spindle activity to psychosocial stress response and coping strategies in healthy kindergarten children.
In a cross-sectional study of 41 5-year old kindergarten children we examined stress-induced hypothalamic-pituitary-adrenocortical (HPA) system activity by saliva cortisol measurements and sleep regulation by sleep EEG-monitoring.

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Dec
1969

For adolescent elite athletes, parental financial and emotional support is crucial. However, parents of elite athletes may be critical and demanding. Moreover, there is evidence that girls report more favorable perceived parenting styles compared with boys.

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