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Altered amygdalar emotion space in borderline personality disorder normalizes following dialectical behaviour therapy. J Psychiatry Neurosci 2023; 48:E431-E438. [PMID: 37935476 PMCID: PMC10635707 DOI: 10.1503/jpn.230085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Revised: 07/24/2023] [Accepted: 09/05/2023] [Indexed: 11/09/2023] Open
Abstract
BACKGROUND Borderline personality disorder (BPD) is a mental health condition characterized by an inability to regulate emotions or accurately process the emotional states of others. Previous neuroimaging studies using classical univariate analyses have tied such emotion dysregulation to aberrant activity levels in the amygdala of patients with BPD. However, multivariate analyses have not yet been used to investigate how representational spaces of emotion information may be systematically altered in patients with BPD. METHODS Patients with BPD performed an emotional face matching task while undergoing MRI before and after a 10-week inpatient program of dialectical behavioural therapy. Representational similarity analysis (RSA) was applied to activity patterns (evoked by angry, fearful, neutral and surprised faces) in the amygdala and temporo-occipital fusiform gyrus of patients with BPD and in the amygdala of healthy controls. RESULTS We recruited 15 patients with BPD (8 females, 6 males, 1 transgender male) to participate in the study, and we obtained a neuroimaging data set for 25 healthy controls for a comparative analysis. The RSA of the amygdala revealed a negative bias in the underlying affective space (in that activity patterns evoked by angry, fearful and neutral faces were more similar to each other than to patterns evoked by surprised faces), which normalized after therapy. This bias-to-normalization effect was present neither in activity patterns of the temporo-occipital fusiform gyrus of patients nor in amygdalar activity patterns of healthy controls. LIMITATIONS Larger samples and additional questionnaires would help to better characterize the association between specific aspects of therapy and changes in the neural representational space. CONCLUSION Our findings suggest a more refined role for the amygdala in the pathological processing of perceived emotions and may provide new diagnostic and prognostic imaging-based markers of emotion dysregulation and personality disorders.Clinical trial registration: DRKS00019821, German Clinical Trials Register (Deutsches Register Klinischer Studien).
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GABA and gabapentin – commonalities and distinctions in (co-)crystallization behaviour from molecular conformation to crystal lattice. ACTA CRYSTALLOGRAPHICA SECTION A FOUNDATIONS AND ADVANCES 2022. [DOI: 10.1107/s2053273322090970] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/19/2023]
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Biobanking in everyday clinical practice in psychiatry-The Munich Mental Health Biobank. Front Psychiatry 2022; 13:934640. [PMID: 35935431 PMCID: PMC9353268 DOI: 10.3389/fpsyt.2022.934640] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Accepted: 06/23/2022] [Indexed: 12/01/2022] Open
Abstract
Translational research on complex, multifactorial mental health disorders, such as bipolar disorder, major depressive disorder, schizophrenia, and substance use disorders requires databases with large-scale, harmonized, and integrated real-world and research data. The Munich Mental Health Biobank (MMHB) is a mental health-specific biobank that was established in 2019 to collect, store, connect, and supply such high-quality phenotypic data and biosamples from patients and study participants, including healthy controls, recruited at the Department of Psychiatry and Psychotherapy (DPP) and the Institute of Psychiatric Phenomics and Genomics (IPPG), University Hospital of the Ludwig-Maximilians-University (LMU), Munich, Germany. Participants are asked to complete a questionnaire that assesses sociodemographic and cross-diagnostic clinical information, provide blood samples, and grant access to their existing medical records. The generated data and biosamples are available to both academic and industry researchers. In this manuscript, we outline the workflow and infrastructure of the MMHB, describe the clinical characteristics and representativeness of the sample collected so far, and reveal future plans for expansion and application. As of 31 October 2021, the MMHB contains a continuously growing set of data from 578 patients and 104 healthy controls (46.37% women; median age, 38.31 years). The five most common mental health diagnoses in the MMHB are recurrent depressive disorder (38.78%; ICD-10: F33), alcohol-related disorders (19.88%; ICD-10: F10), schizophrenia (19.69%; ICD-10: F20), depressive episode (15.94%; ICD-10: F32), and personality disorders (13.78%; ICD-10: F60). Compared with the average patient treated at the recruiting hospitals, MMHB participants have significantly more mental health-related contacts, less severe symptoms, and a higher level of functioning. The distribution of diagnoses is also markedly different in MMHB participants compared with individuals who did not participate in the biobank. After establishing the necessary infrastructure and initiating recruitment, the major tasks for the next phase of the MMHB project are to improve the pace of participant enrollment, diversify the sociodemographic and diagnostic characteristics of the sample, and improve the utilization of real-world data generated in routine clinical practice.
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Association of loneliness and social network size in adulthood with childhood maltreatment: Analyses of a population-based and a clinical sample. Eur Psychiatry 2022; 65:e55. [PMID: 36059118 PMCID: PMC9491078 DOI: 10.1192/j.eurpsy.2022.2313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Background Perceived loneliness and objective social network size are related but distinct factors, which negatively affect mental health and are prevalent in patients who have experienced childhood maltreatment (CM), for example, patients with persistent depressive disorder (PDD) and borderline personality disorder (BPD). This cross-diagnostic study investigated whether loneliness, social network size, or both are associated with self-reported CM. Methods Loneliness and social network size were assessed in a population-based sample at two time points (Study 1, N = 509), and a clinical group of patients with PDD or BPD (Study 2, N = 190) using the UCLA Loneliness Scale and the Social Network Index. Further measures were the Childhood Trauma Questionnaire, and standard depression rating scales. Linear regression analyses were applied to compare associations of loneliness or social network size with CM. Multiple mediation analyses were used to test the relative importance of loneliness and social network size in the relationship between CM and depressive symptoms. Results In both studies, loneliness showed a stronger association than social network size with CM. This was particularly marked for emotional neglect and emotional abuse. Loneliness but not social network size mediated the relationship between CM and depressive symptoms. Conclusions Loneliness is particularly associated with self-reported CM, and in this respect distinct from the social network size. Our results underline the importance of differentiating both psychosocial constructs and suggest focusing on perceived loneliness and its etiological underpinnings by mechanism-based psychosocial interventions.
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Multifactorial barriers in the implementation of schizophrenia and psychosocial therapies guidelines: A quantitative study across different professions. Schizophr Res 2021; 228:425-434. [PMID: 33561620 DOI: 10.1016/j.schres.2021.01.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 01/13/2021] [Accepted: 01/16/2021] [Indexed: 12/23/2022]
Abstract
BACKGROUND Clinical guidelines can facilitate the transfer of scientific evidence into clinical practice, yet their implementation still faces difficulties. The aim of this study was to examine the implementation status of the current German evidence- and consensus-based guidelines for schizophrenia (2019) and psychosocial therapies (2019) and to identify barriers as well as facilitators in guideline adherence. METHODS We used a quantitative approach by developing an online questionnaire, focusing on the current implementation status as well as barriers and facilitators in guideline adherence. The questionnaire was sent to 100 hospitals for psychiatry and psychosomatics and 52 professional associations in mental healthcare in Germany (investigation period: 10/2019-01/2020). RESULTS In total, 657 mental healthcare professionals (MHCP, e.g. medical doctors, psychologists, psychosocial therapists, caregivers) provided sufficient responses for analyses. Less than half (47%) of our participants were aware of the existence of the guideline for psychosocial therapies, while 74% exhibited awareness of the schizophrenia guideline. A minority reported to adhere to the current guidelines for schizophrenia (41%) and psychosocial interventions (18%). Profession-related differences in the implementation-status were detected. Specifically, medical doctors exhibited higher awareness rates than psychosocial therapists and caregivers and additionally higher adherence rates than psychologists and caregivers. Medical doctors were less exposed to knowledge-related barriers (e.g. lack of guideline familiarity), while no differences across professions were found in external/behavior-related barriers (e.g. long versions). DISCUSSION AND CONCLUSION Our findings indicate that the implementation of guidelines as well as related barriers vary between professions. To prevent a growing gap in guideline adherence between MHCP, target-specific implementation strategies should be considered.
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Simultaneous EEG–PET–fMRI measurements in disorders of consciousness: an exploratory study on diagnosis and prognosis. J Neurol 2017; 264:1986-1995. [DOI: 10.1007/s00415-017-8591-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Revised: 08/08/2017] [Accepted: 08/08/2017] [Indexed: 12/28/2022]
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Relative potency factors for a preliminary toxicological risk assessment of pyrrolizidine alkaloids in food and herbal medicines. Toxicol Lett 2016. [DOI: 10.1016/j.toxlet.2016.06.1786] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Crystal structures of 2-chloropyridine and 2-fluoropyridine: Isostructural crystal packing or not? Struct Chem 2016. [DOI: 10.1007/s11224-015-0603-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Abstract
Herein we report on the selective CO2 uptake from air by a dinickel azacryptand complex and its capability to act as a reversible CO2 storage system.
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Evidence that Doublecortin is dispensable for the development of adult born neurons in mice. PLoS One 2013; 8:e62693. [PMID: 23667508 PMCID: PMC3647037 DOI: 10.1371/journal.pone.0062693] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2012] [Accepted: 03/24/2013] [Indexed: 11/18/2022] Open
Abstract
In mammals, adult neural stem cells give rise to new hippocampal dentate granule neurons and interneurons of the olfactory bulb throughout life. The microtubule associated protein Doublecortin (DCX) is expressed by migrating neuroblasts and immature neurons, and is widely used as a stage-specific marker of adult neurogenesis and as a marker to identify neurogenic activity in the adult brain per se. Mutations in the DCX gene have been causally linked to human lissencephalic syndromes. Moreover, embryonic loss of DCX function interferes with neuronal migration and dendritic patterning in a species- and region-specific manner. A putative function of DCX in adult neurogenesis has not been directly explored. Here we show that overexpression of DCX in newly generated dentate granule neurons of the adult mouse brain has no effect on morphological maturation or migration. We also show that micro (mi) RNA-mediated retroviral knockdown of DCX does not alter morphological maturation of adult born dentate granule cells or migration of new neurons in either adult neurogenic niche. Thus, the present data indicate that DCX is dispensable for the development of new neurons in adult mice.
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Fluorine substituents disturb the aggregation of molecules. Acta Crystallogr A 2012. [DOI: 10.1107/s0108767312098686] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Hydrogen/deuterium exchange on small organic molecules and its influence on the molecular aggregation. Acta Crystallogr A 2012. [DOI: 10.1107/s0108767312095797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Morphology and Hemodynamics during Vascular Regeneration in Critically Ischemic Murine Skin Studied by Intravital Microscopy Techniques. Eur Surg Res 2011; 47:222-30. [DOI: 10.1159/000333088] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2011] [Accepted: 07/20/2011] [Indexed: 12/28/2022]
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Fluorine determines the aggregation of pyridines. Experiment versustheory. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311083279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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CREB in adult neurogenesis - master and partner in the development of adult-born neurons? Eur J Neurosci 2011; 33:1078-86. [DOI: 10.1111/j.1460-9568.2011.07606.x] [Citation(s) in RCA: 114] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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CREB signalling regulates early survival, neuronal gene expression and morphological development in adult subventricular zone neurogenesis. Mol Cell Neurosci 2010; 46:79-88. [PMID: 20801218 DOI: 10.1016/j.mcn.2010.08.008] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2010] [Revised: 07/30/2010] [Accepted: 08/15/2010] [Indexed: 01/22/2023] Open
Abstract
Neural stem cells in the subventricular zone (SVZ) of the lateral ventricles give rise to new interneurons of the olfactory bulb (OB) throughout life. SVZ/OB neurogenesis is influenced by olfactory network activity, which modulates the survival of new neurons during their integration into the OB network. Previous work suggested that such activity-dependent survival is regulated via the CREB signalling pathway. Curiously, CREB signalling is already active during the early developmental stages of adult SVZ/OB neurogenesis. To investigate the role of cell autonomous CREB signalling during early stages of adult SVZ/OB neurogenesis, we ablated CREB-pathway activity in the SVZ/OB neurogenic lineage using a retroviral strategy. Surprisingly, loss of CREB signalling resulted in increased cell death and loss of expression of the neurogenic transcription factor Pax 6, and of a subset of neuronal proteins in migrating neurons of the RMS. Moreover, post-migratory neurons in the OB displayed impaired dendritic development. These results demonstrate an essential role for CREB signalling in maturation of newborn neurons in the OB and uncover a novel role for CREB signalling in the survival and maintenance of neuronal gene expression during the early stages of SVZ/OB neurogenesis.
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Actively transcribed rRNA genes in S. cerevisiae are organized in a specialized chromatin associated with the high-mobility group protein Hmo1 and are largely devoid of histone molecules. Genes Dev 2008; 22:1190-204. [PMID: 18451108 DOI: 10.1101/gad.466908] [Citation(s) in RCA: 145] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Synthesis of ribosomal RNAs (rRNAs) is the major transcriptional event in proliferating cells. In eukaryotes, ribosomal DNA (rDNA) is transcribed by RNA polymerase I from a multicopy locus coexisting in at least two different chromatin states. This heterogeneity of rDNA chromatin has been an obstacle to defining its molecular composition. We developed an approach to analyze differential protein association with each of the two rDNA chromatin states in vivo in the yeast Saccharomyces cerevisiae. We demonstrate that actively transcribed rRNA genes are largely devoid of histone molecules, but instead associate with the high-mobility group protein Hmo1.
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Tradition verpflichtet: Aufbereitungstechnik im Wandel der Zeit. CHEM-ING-TECH 2003. [DOI: 10.1002/cite.200390470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Lewis base properties of tris(trimethylstannyl)amine: unusually short M–N bonds of the adduct compounds [X3M·N(SnMe3)3] (X = Cl, Br; M = Al, Ga, In) and [Cl2(CH3)M·N(SnMe3)3] (M = Al, Ga). ACTA ACUST UNITED AC 2002. [DOI: 10.1039/b203489c] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Tetraphosphanylsilane - A Mild PH2-Transfer Reagent and Building Block for the Synthesis of a Rhombododecahedral Li6P6Si2-Cluster Framework. Z Anorg Allg Chem 2001. [DOI: 10.1002/1521-3749(200106)627:6<1225::aid-zaac1225>3.0.co;2-l] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Orthotelluric Acid as Substitute for Crystal-Water: Syntheses and Crystal Structure of the Co-crystallate [Te(OH)6 · 2 Adenine · 4 H2O] and the Disodium Ditellurate(VI) Aggregate {[Te2O2(OH)6(ONa)2]2[NaOH · 12.5 H2O]}. Z Anorg Allg Chem 2001. [DOI: 10.1002/1521-3749(200102)627:2<213::aid-zaac213>3.0.co;2-w] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Abstract
The Al3P3 heterocycle 1 is formed in 94% yield by the reaction of the primary silylphosphane 6a with Me3Al in toluene at 70 degrees C. While 1 crystallizes in an isomerically pure form, in which the six-membered Al3P3 ring prefers the chair conformation and the P-H hydrogen atoms adopt exo positions, it isomerizes in solution to give different diastereomers as shown by 1H and 31P NMR spectroscopy. Intermolecular cyclocondensation of 1 at 110 degrees C in toluene leads, under liberation of methane, to the distorted hexameric-prismatic (AlP)6 cluster 2 in 98% yield. The capability of 1 to function as a building block was further used for the synthesis of the solvent-separated ion pair [Li(thf)2]+ [(Me2Al)4(PR)3]- (3) which was prepared by a one-pot reaction of 1 with nBuLi and Me2AlCl in 15% yield. The structure of 3 was established by an X-ray diffraction analysis. Double deprotonation at phosphorus in 1 with RPLi2 (R = iPr3Si) (molar ratio 1:2), and subsequent transformation of the reaction mixture with Me3Al afforded the novel donor-solvent-free cluster 4 in 62% yield. The latter consists of a rhombododecahedral Al4Li4P6 framework, in which the Li centers are three-coordinate. The reaction of the silylphosphane 6b with the trimethylamine adduct of alane furnishes not only the hexamer (RPAIH)6 (R = (iPrMe2C)-Me2Si) but also the corresponding heptamer 5, which has a nonregular polyhedral (AIP)7 framework and represents the first cluster of this type.
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Perstannylated Ammonium and Phosphonium Ions: Organometallic Onium Ions That Are also Base-Stabilized Stannylium Ions This work was supported by the Deutsche Forschungsgemeinschaft, the Ministerium für Schule, Weiterbildung und Forschung des Landes Nordrhein-Westfalen and by the Fonds der Chemischen Industrie. Angew Chem Int Ed Engl 2000; 39:3684-3686. [PMID: 11091439 DOI: 10.1002/1521-3773(20001016)39:20<3684::aid-anie3684>3.0.co;2-u] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Synthesis of a Mixed-Metalated Dilithium-Disilver Cyclosilaphosphanide Complex with Attractive AgI-AgI Interactions. Z Anorg Allg Chem 1999. [DOI: 10.1002/(sici)1521-3749(199912)625:12<2192::aid-zaac2192>3.0.co;2-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Abstract
Molecular clusters with archimedean and platonic shape, which in order to build a closed polyhedron, spontaneously eliminate H(2) or voluntarily encapsulate Li(2)O as a "cluster nucleus", result from the dilithiation of primary silylphosphanes and silylarsanes with BuLi. Thus, the first mixed-valent, decameric P(10)Li(16) cluster 1 was obtained from iPr(3)SiPH(2) and tBuLi (molar ratio 1:2) with strict exclusion of LiOH and Li(2)O, whereas partial metalation in the presence of LiOH initially leads to a dodecameric, Li(2)O-containing cluster 2, from which the three-shell cluster 3 with a [Li(6)O](4+) core is obtained.
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Synthesis of geminal-bis(trifluoromethyl)-substituted dienes, heterodienes, 7,7,7,8,8,8-hexafluoro-β-cyclocitral and -safranal. J Fluor Chem 1999. [DOI: 10.1016/s0022-1139(99)00038-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Ungewöhnliche Reaktivität der Silicium-Phosphor-Doppelbindung in einem Silyliden(fluorsilyl)phosphan: intramolekulare C,H-Inserierung und seine Umwandlung in ein neues Silyliden(silyl)phosphan. Z Anorg Allg Chem 1999. [DOI: 10.1002/(sici)1521-3749(199907)625:7<1119::aid-zaac1119>3.0.co;2-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Abstract
Vitamin D3-derivatives are known to be effective in differentiation and proliferation of epidermal cells. However, under certain circumstances, they also may show a hypercalcamic activity which can be a serious limitation in their use for dermatological application. For keeping small the negative side effects of vitamin D3-derivatives and for increasing the drug concentration in the skin we investigated their incorporation in liposomes to optimize their use for psoriasis treatment. The incorporation of vitamin D3-derivatives in liposomes of different lipid composition was studied by HPLC, DSC and freeze-fracture electron microscopy. Incorporation rates of more than 80% of the offered drug were found with significant variations related to the number of hydroxyl-groups in the A-ring, opened or closed B-ring, and some modifications in the side chain of the steroid-molecules. In general, the incorporation rates in egg-PC liposomes have been of about 3% up to 10% higher than in DMPC liposomes. Results, obtained by DSC and freeze-fracture electron microscopy, show a depression of the phase transition of DMPC bilayers by incorporation of vitamin D3 already at a concentration of 10 mol%. These results support the idea that vitamin D3 and its analoga investigated are incorporated into the lipid bilayer modifying there the lipid-lipid interactions.
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Abstract
The influence of different liposomal qualities, loaded with a variety of vitamin D3-analogues, on the proliferation and interleucine 1 alpha-release (IL-1 alpha) of human keratinocytes was examined by fluorimetric and colorimetric measurements to optimize their use for psoriasis treatment. In comparison, the effects of the free drugs, as 25-hydroxyvitamin D3, calcipotriol, and calcitriol, as well as of empty liposomes have been studied. At the interaction between empty liposomes (< 200 nm) and HaCaT-cells has been looked by electron microscopy. Empty liposomes, made of DMPC as well as of egg-PC, can be used as drug carrier without any inhibiting effect on the proliferation of human keratinocytes at lipid concentrations of < 10(-4) M. Under the influence of the free drugs investigated an inhibition of cell growth as well as of the IL 1 alpha-release was measured at drug concentrations of > or = 10(-8) M. In comparison the related liposomal drug formulations didn't show any diminishing in the proliferation effects caused by the free drugs. A significant improvement, however, was only found in the action of DMPC-incorporated 25-hydroxyvitamin D3 at drug concentration of 10(-7) M. These results suggest that there is no remarkable improvement in the action of liposomal incorporated vitamin D3-analogues neither related to their proliferation nor their IL1 alpha-releasing effects. The influence of liposomal incorporated vitamin D3-analogues in keeping small their negative side effects has to be investigated at a more relevant model.
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[Unusual diagnosis in gallstone ileus. (Demonstration of the obstructing concrement by contrast flow--2 cases)]. FORTSCHRITTE AUF DEM GEBIETE DER RONTGENSTRAHLEN UND DER NUKLEARMEDIZIN 1970; 113:653-6. [PMID: 5535316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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[Functional phlebography of thejleg as an ambulatory examination]. ZEITSCHRIFT FUR ARZTLICHE FORTBILDUNG 1969; 63:882-3. [PMID: 5362195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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