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Hass HG, Jobst J, Nehls O, Frilling A, Hartmann JT, Kaiser S. The gene coding for secreted phosphoprotein1/osteopontin is the most overexpressed gene in cholangiocarcinoma—detected by oligonucleotide arrays and LightCycler analysis. J Clin Oncol 2006. [DOI: 10.1200/jco.2006.24.18_suppl.10036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
10036 Background: Cholangiocarcinomas (CCC) are the second most common primary hepatic malignancy with a still poor prognosis and arise from biliary epithelia or cholangiocytes. Until now, less is known about the molecular pathways leeding to CCC. Methods: Oligonucleotide arrays were used to analyze gene expression profiles of 8 intrahepatic CCCs. After isolation of tRNA and transcription into cDNA, biotin-labelled cRNA probes were hybridized to GeneArrays (Affymetrix U 133A) containing probes of more than 22.000 genes/ESTs. For two-dimensional cluster analysis we used special software programs (Genexplore, GeneSpring). Dysregulated genes were determined by presence in more than 70% and a 2-fold change in relation to the corresponding non-malignant liver tissue. Lightcycler analysis were performed to validate the expression datas of dysregulated genes. Results: A total of 694 dysregulated genes (330 up-/364 down-regulated, compared with corresponding non-malignant tissue) were detected. As the gene with the highest and most consistent upregulation we were able to identify osteopontin (OPN) with an average 5-fold overexpression in all CCC tissues. OPN is an acidic phosphoprotein that is secreted by osteoblasts, macrophages and many other cell types and binds to a variety of cell surface receptors (integrins/CD44). OPN is multifunctional, with activities in cell migration, regulation of bone metabolism, immune cell function and control of tumor cell phenotype. Elevated OPN levels were seen in different tumors but until now no data exist about the expression in CCCs. As one possible interaction in human carcinogenesis, OPN has recently been shown to be a novel substrate for some MMPs, which play an importand role in tumor invasion and metastasis. Conclusions: This is the first report about an overexpression of OPN in CCC and our data indicate an important role in cholangiocarcinogenesis. Further studies are needed to illucidate the moleculargenetic mechanisms of OPN interactions in CCC. No significant financial relationships to disclose.
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Roesch-Ely D, Göhring K, Gruschka P, Kaiser S, Pfüller U, Burlon M, Weisbrod M. Pergolide as Adjuvant Therapy to Amisulpride in the Treatment of Negative and Depressive Symptoms in Schizophrenia. PHARMACOPSYCHIATRY 2006; 39:115-6. [PMID: 16721703 DOI: 10.1055/s-2006-941488] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Negative and cognitive symptoms of schizophrenia are associated with a hypodopaminergic state in the frontal cortex and do not respond to neuroleptics equally well as positive symptoms. Therefore pharmacological strategies, which increase dopamine metabolism in the mesocortical pathways, may prove beneficial to ameliorate these symptoms. We report on a case of a patient with paranoid schizophrenia, who still presented negative and depressive symptoms during treatment with amisulpride for more than 6 weeks. We prescribed pergolide (a mixed D1/D2 agonist) as adjuvant therapy to treat these symptoms. The patient showed an improvement of global psychopathology, decrease of negative and depressive symptoms, while no changes in positive symptoms nor EPS were present. For this patient, the adjuvant therapy of pergolide to amisulpride constituted a valid pharmacological approach to treat negative and depressive symptoms of schizophrenia, without increasing positive symptoms.
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Osterhoff MA, Richter S, Herrmann M, Tasic J, Kaiser S, Weickert MO, Moehlig M, Spranger J, Pfeiffer AFH. Association of polymorphisms within the protein kinase C β promoter with insulin-resistance in non-obese subjects. Exp Clin Endocrinol Diabetes 2006. [DOI: 10.1055/s-2006-932863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Kaiser S, Mundt C, Weisbrod M. [Executive control functions and neuropsychiatric disorders -- perspectives for research und clinical practice]. FORTSCHRITTE DER NEUROLOGIE-PSYCHIATRIE 2005; 73:438-50. [PMID: 16052438 DOI: 10.1055/s-2004-830303] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Executive control functions are higher cognitive functions for complex goal-oriented behavior in situations where routine mechanisms are not available or inappropriate. In clinical practice executive dysfunction presents with deficits in cognitive function as well as social behavior and drive. Executive control functions rely on intact networks involving prefrontal cortex and subcortical structures, which can be modulated by monoaminergic neurotransmitters. Deficits of executive control have been described in a variety of neuropsychiatric disorders. We present a review of the findings with a focus on movement disorders, schizophrenia and affective disorders. We emphasize similarities between these disorders regarding the pathophysiology of fronto-subcortical networks. Based on these similarities, principles of pharmacological and rehabilitative strategies can be applied to the treatment of executive deficits in a variety of neuropsychiatric disorders without being specific for one disease. Since executive dysfunction is highly relevant to prognosis, controlled trials of these treatments are urgently needed.
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Hass HG, Nägele T, Seeger U, Hösl F, Gregor M, Kaiser S. [Detection of subclinical and overt hepatic encephalopathy and treatment control after L-ornithine-L-aspartate medication by magnetic resonance spectroscopy ((1)H-MRS)]. ZEITSCHRIFT FUR GASTROENTEROLOGIE 2005; 43:373-8. [PMID: 15830303 DOI: 10.1055/s-2004-813917] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Hepatic encephalopathy (HE) is a common problem in liver cirrhosis and is associated with typical changes of cerebral metabolite pattern observed by proton magnetic resonance spectroscopy (MRS). In HE, a reduction of the cerebral myo-inositol (mI) and choline (Cho) and an increase of glutamine/glutamate (Glx) can typically be detected with this method. In the present study MRS was used to assess prospectively specific parameters of cerebral metabolism before and after 6 days of treatment with a low-protein diet and with L-ornithine-L-aspartate (LOLA). 6 patients with liver cirrhosis were included in this pilot study. According to standardized neuropsychological tests overt HE or subclinical HE was detected in all patients. All patients received a low-protein diet (< 60 g/d) and were treated additionally with LOLA (20 g QD i. v.). MRS examinations were done before and after 6 days of treatment and the results were compared with those of healthy volunteers. Before treatment mI/Cr ratios in the grey matter were reduced significantly in cirrhotic patients as compared to healthy volunteers (0.30 +/- 0.22 vs. 0.68 +/- 0.11; P = 0.028). In addition, patients showed a (non-significant) reduction of the Cho/Cr-ratio (0.19 +/- 0.03 vs. 0.25 +/- 0.02; P = 0.17) and an elevated Glx/Cr-ratio (1.84 +/- 0.63 vs. 1.29 +/- 0.31; P = 0.05). After 6 days of treatment a significant increase of the Cho/Cr ratio (0.23 +/- 0.03 vs. 0.19 +/- 0.03; P = 0.028) was detectable and 5 of the 6 patients showed a (not significant) decrease of the elevated Glx/Cr ratios. After cessation of treatment an improvement in neuropsychological tests as shown by number-connection testing (P = 0.046) as well as a decrease of elevated pre-treatment ammonia blood levels were noted. These findings, however, did not correlate with the Child-Pugh classification or evidence of clinical/subclinical HE. Using (1)H-MRS it is possible to observe a specific pattern of cerebral metabolites in patients with overt and subclinical HE. In this pilot study a fast change of cerebral metabolite pattern after specific therapy of HE with LOLA was detected. Therefore, future studies with larger patient groups are needed to establish (1)H-MRS as an objective method for detection and treatment control in overt and subclinical HE, especially when compared to commonly used parameters such as ammonia levels or standardized neuropsychological tests.
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Osterhoff MA, Herrmann M, Lazdins M, Kaiser S, Assert R, Weickert MO, Spranger J, Möhlig M, Pfeiffer AFH. Association of two genetic markers within the protein kinase C beta gene with type 2 diabetes mellitus. Exp Clin Endocrinol Diabetes 2005. [DOI: 10.1055/s-2005-862960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Graschew G, Roelofs TA, Rakowsky S, Schlag PM, Kaiser S, Albayrak S. VEMH - Virtual Euro-Mediterranean Hospital for Global Healthcare. Stud Health Technol Inform 2005; 114:39-45. [PMID: 15923759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
The Virtual Euro-Mediterranean Hospital (VEMH) aims to facilitate the interconnection of various medical services through real integration. VEMH will provide an integrated satellite-terrestrial platform and realize telemedical services such as e-learning, real-time telemedicine and medical assistance and offer individual grants to young medical doctors. The methodologies of the VEMH are medical-need-oriented instead of technology-oriented. VEMH will provide for medical professionals in the whole Euro-Mediterranean area access to the required quality of medical service. For the successful deployment of the services of the VEMH GRID technologies have to be implemented especially for evidence-based medicine. A Metagrid Service Engine implements an additional software layer between proprietary GRID engines and the different applications. The use of mobile code is envisioned in future GRIDs which allows service creation and deployment on arbitrary nodes of a GRID. Dynamic Grid structures become an important point for the use of mobile code.
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Mergler S, Plath T, Groetzinger C, Kaiser S, Neuhaus P, Wiedenmann B. Expression of Transient Receptor Potential (TRP) channels of the M-family in cultured human neuroendocrine tumor (NET) cells. Exp Clin Endocrinol Diabetes 2004. [DOI: 10.1055/s-2004-832915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Haerle V, Hahn B, Kaiser S, Weimar A, Bader S, Eberhard F, Plössl A, Eisert D. High brightness LEDs for general lighting applications Using the new ThinGaN™-Technology. ACTA ACUST UNITED AC 2004. [DOI: 10.1002/pssa.200405119] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Kaiser S, Mesas-Burgos C, Söderman E, Frenckner B. Appendicitis in children--impact of US and CT on the negative appendectomy rate. Eur J Pediatr Surg 2004; 14:260-4. [PMID: 15343467 DOI: 10.1055/s-2004-817841] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
BACKGROUND/PURPOSE Ultrasonography (US) and computed tomography (CT) have proved useful for the evaluation of suspected appendicitis and were introduced as diagnostic tools at our institution about ten and five years ago, respectively. The aim of this study was to evaluate how the negative appendectomy and perforation rates have changed with increased use of US and CT. METHODS The medical records of 600 children who underwent appendectomy during years 1991, 1994, 1997, and 2000 were reviewed. Perforation in perforated appendicitis was considered to have occurred after admission if the time interval between the first health professional contact and surgery exceeded 12 hours. RESULTS The total number of appendectomies during the years 1991, 1994, 1997, and 2000 was 406, 334, 407, and 397, respectively. The negative appendectomy rate for the same years was 23%, 8.7%, 8.0%, and 4.0%, respectively. The overall rate of perforations and the perforation rate after admission was 32% and 12%, 34% and 7.3%, 34% and 13%, and 29% and 2.1%, respectively. The rate of patients who underwent US and CT during each period was 1.0% and 0.0%, 41% and 0.0%, 91% and 21% and 98% and 59%, respectively. CONCLUSIONS The negative appendectomy rate has been substantially reduced after the introduction of both US and CT. The rate of perforation after admission has not increased.
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Hass HG, Nehls O, Gregor M, Kaiser S, Kreysel C. Treatment of chronic hepatitis C in naive patients with high-dose interferon-alpha2a induction therapy and two different ribavirin doses. Dig Liver Dis 2004; 36:367-8. [PMID: 15191208 DOI: 10.1016/j.dld.2004.01.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Kaiser S, Hahn J, Zhu YH, Anton L, Yang CZ, Kirsch WM, Dickson C. 192 CONTROLLING HEMORRHAGE IN EXPERIMENTAL VASCULAR INJURIES: A PILOT STUDY. J Investig Med 2004. [DOI: 10.1136/jim-52-suppl1-192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Kristiansen G, Kaiser S, Pilarsky C, Dahl E, Winzer K, Denkert C, Stephan C, Jung K, Guski H, Petersen I, Hauptmann S, Rosenthal A, Altevogt P, Dietel M. Differentially expressed genes in prostate cancer — identification of CD24 as a new prognostic marker. Pathol Res Pract 2004. [DOI: 10.1016/s0344-0338(04)80436-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Löffler G, Kaiser S, Bosch K, Hofbauer H. Hydrodynamics of a dual fluidized-bed gasifier—Part I: simulation of a riser with gas injection and diffuser. Chem Eng Sci 2003. [DOI: 10.1016/s0009-2509(03)00232-x] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Kaiser S, Löffler G, Bosch K, Hofbauer H. Hydrodynamics of a dual fluidized bed gasifier. Part II: simulation of solid circulation rate, pressure loop and stability. Chem Eng Sci 2003. [DOI: 10.1016/s0009-2509(03)00233-1] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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91
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Kaiser S, Kruijver FPM, Straub RH, Sachser N, Swaab DF. Early social stress in male Guinea-pigs changes social behaviour, and autonomic and neuroendocrine functions. J Neuroendocrinol 2003; 15:761-9. [PMID: 12834437 DOI: 10.1046/j.1365-2826.2003.01055.x] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The present study was undertaken to investigate the effects of pre- and early postnatal social stress on the functioning of hormonal, autonomic and behavioural systems, by studying the distribution of sex hormone receptors in limbic brain systems. Dams had either lived in groups with a constant composition (= stable social environment) or in groups with changing compositions, i.e. every third day, two females from different groups were exchanged (= unstable social environment). The subjects were male offspring of dams who had either lived in a stable social environment during pregnancy and lactation (= control males) or in an unstable social environment during this period of life (= early stressed males). From days 20-80, the spontaneous behaviour of control males and early stressed males was recorded in their home cages. Five control males and five early stressed males were killed at 75 days, and five control males and five early stressed males at 120 days. Blood samples were taken to determine serum concentrations of cortisol, testosterone, dehydroepiandrosterone, dehydroepiandrosterone sulphate and oestrogen. The adrenals were prepared to determine tyrosine hydroxylase activities and the brains were used to investigate the distribution of sex-hormone receptors in specific hypothalamic and hippocampal brain areas. Early stressed males showed a behavioural infantilization that was accompanied by significantly decreased adrenal tyrosine hydroxylase activities and dehydroepiandrosterone levels. Furthermore, early stressed males showed a down-regulation of androgen receptors in the medial preoptic area and the nucleus arcuatus of the hypothalamus, as well as of oestrogen receptor alpha in the hippocampus compared to control males. Thus, the present study provides clear evidence that early social stress induces changes in endocrine, autonomic and limbic brain function, which is mirrored by changes in male social behaviour.
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Zimmermann S, Voss M, Kaiser S, Kapp U, Waller CF, Martens UM. Lack of telomerase activity in human mesenchymal stem cells. Leukemia 2003. [PMID: 12764382 DOI: 10.1038./sj.leu.2402962] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Telomerase activity and telomere maintenance have been associated with immortality in tumor and embryonic stem cells. Whereas most normal somatic cells are telomerase negative, low levels of this enzyme have been found in adult stem cells from the skin, gut and the hematopoietic system. Here, we show that telomerase activity is not detectable in human mesenchymal stem cells (hMSCs), which have the phenotype SH2+, SH3+, SH4+, CD29+, CD44+, CD14-, CD34- and CD45-, and have the capacity to differentiate into adipocytes, chondrocytes and osteoblasts. These data suggest that hMSCs have a different telomere biology compared to other adult stem cells. Alternatively, true mesenchymal stem cells might be a very rare subpopulation that have a detection level that is below the sensitivity of the TRAP assay.
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Zimmermann S, Voss M, Kaiser S, Kapp U, Waller CF, Martens UM. Lack of telomerase activity in human mesenchymal stem cells. Leukemia 2003; 17:1146-9. [PMID: 12764382 DOI: 10.1038/sj.leu.2402962] [Citation(s) in RCA: 197] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Telomerase activity and telomere maintenance have been associated with immortality in tumor and embryonic stem cells. Whereas most normal somatic cells are telomerase negative, low levels of this enzyme have been found in adult stem cells from the skin, gut and the hematopoietic system. Here, we show that telomerase activity is not detectable in human mesenchymal stem cells (hMSCs), which have the phenotype SH2+, SH3+, SH4+, CD29+, CD44+, CD14-, CD34- and CD45-, and have the capacity to differentiate into adipocytes, chondrocytes and osteoblasts. These data suggest that hMSCs have a different telomere biology compared to other adult stem cells. Alternatively, true mesenchymal stem cells might be a very rare subpopulation that have a detection level that is below the sensitivity of the TRAP assay.
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Kaiser S, Toborek M. High-efficiency transfection of human endothelial cells mediated by cationic lipids. J Neurochem 2003. [DOI: 10.1046/j.1471-4159.85.s2.17_4.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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95
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Sternbach LH, Kaiser S, Reeder E. Quinazoline 3-Oxide Structure of Compounds Previously Described in the Literature as 3.1.4-Benzoxadiazepines1. J Am Chem Soc 2002. [DOI: 10.1021/ja01487a058] [Citation(s) in RCA: 64] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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97
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Jampolsky LM, Baum M, Kaiser S, Sternbach LH, Goldberg MW. The Synthesis of 2,2'- and 4,4'-Polymethylenebipyridines. J Am Chem Soc 2002. [DOI: 10.1021/ja01140a516] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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99
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Sternbach LH, Kaiser S. Antispasmodics. III.1 Esters of Basic Bicyclic Alcohols and Their Quaternary Salts. J Am Chem Soc 2002. [DOI: 10.1021/ja01119a534] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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100
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Berger J, Sternbach LH, Pollock RG, La Sala ER, Kaiser S, Goldberg MW. Isolation of Antibiotic X-465A and its Identification with Chartreusin. J Am Chem Soc 2002. [DOI: 10.1021/ja01540a032] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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