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Singh A, Gebhart M, Fritsch R, Hoda JC, Sinnegger-Brauns M, Romanin C, Striessnig J, Koschak A. C-terminal splicing reveals intramolecular gating modulation in CaV1.3 L-type Ca2+ channels. BMC Pharmacol 2007. [DOI: 10.1186/1471-2210-7-s2-a11] [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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Schneider G, Reichert M, Saur D, Hamacher R, Fritsch R, Schmid RM. HDAC3 is linked to cell cycle machinery in MiaPaCa2 cells by regulating transcription of skp2. Cell Prolif 2007; 40:522-31. [PMID: 17635519 PMCID: PMC6495918 DOI: 10.1111/j.1365-2184.2007.00454.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
OBJECTIVE Histone deacetylases (HDACs) have been linked to cell cycle control in various models, involving regulation of the cyclin-dependent kinase inhibitor p27(Kip1). RESULTS Here, we demonstrate that HDAC inhibition by trichostatin A reduces S-phase kinase-associated protein 2 mRNA and protein abundance. Furthermore, in contrast to HDAC1, recruited to the skp2 promoter in the G(0) phase, HDAC3 is bound in early S phase. Activating function of HDAC3 towards the skp2 gene has been validated using RNA interference techniques. siRNAs, targeting HDAC3 specifically, reduced skp2 transcription. CONCLUSION These findings propose that the skp2 gene is a novel target of HDAC3, mediating cell cycle control and oncogenesis.
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Schindl R, Frischauf I, Kahr H, Fritsch R, Krenn M, Derndl A, Vales E, Muik M, Derler I, Groschner K, Romanin C. The first ankyrin-like repeat is the minimum indispensable key structure for functional assembly of homo- and heteromeric TRPC4/TRPC5 channels. Cell Calcium 2007; 43:260-9. [PMID: 17624425 DOI: 10.1016/j.ceca.2007.05.015] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2007] [Revised: 05/24/2007] [Accepted: 05/25/2007] [Indexed: 11/29/2022]
Abstract
The closely related TRPC4 and TRPC5 proteins, members of the canonical transient receptor potential (TRPC) family, assemble into either homo- or heterotetrameric, non-selective cation-channels. To elucidate domains that mediate channel complex formation, we evaluated dominant negative effects of N- or C-terminal TRPC4/5 fragments on respective currents of full-length proteins overexpressed in HEK293 cells with whole-cell electrophysiology. Confocal Förster Resonance Energy Transfer (FRET) measurements enabled to probe the interaction potential of these CFP/YFP-labelled fragments in vivo. Only N-terminal fragments that included the first ankyrin-like repeat potently down-regulated TRPC4/TRPC5 currents, while fragments including either the second ankyrin-like repeat and the coiled-coil domain or the C-terminus remained ineffective. Total internal reflection fluorescence (TIRF) microscopy data suggested that the dominant negative N-terminal fragments led to a predominantly intracellular localisation of coexpressed TRPC5 proteins. FRET measurements clearly revealed that only fragments including the first ankyrin-like repeat were able to multimerise. Moreover a TRPC5 mutant that lacked the first ankyrin-like repeat was unable to homo-multimerise, failed to interact with wild-type TRPC5 and resulted in non-functional channels.
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Rojas G, Fritsch R, Solis J, Jadresic E, Araya R. Treating postpartum depression in primary care in Santiago,Chile. Eur Psychiatry 2007. [DOI: 10.1016/j.eurpsy.2007.01.173] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Araya AV, Rojas P, Fritsch R, Rojas R, Herrera L, Rojas G, Gatica H, Silva H, Fiedler JL. Early response to venlafaxine antidepressant correlates with lower ACTH levels prior to pharmacological treatment. Endocrine 2006; 30:289-98. [PMID: 17526941 DOI: 10.1007/s12020-006-0007-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2006] [Revised: 12/12/2006] [Accepted: 12/21/2006] [Indexed: 10/23/2022]
Abstract
A link between stressful life events and development or exacerbation of depression has been established via a large body of evidence. An alteration in the regulation of the hypothalamic-pituitary-adrenal (HPA) axis in depression has also been associated with an increase in cortisol secretion. As arginine-vasopressin (AVP) plays an important role in the activation of HPA axis during stress, the present study investigated ACTH and cortisol secretory response induced by an AVP-related peptide desmopressin (ddAVP) in patients with major depression. Prior to antidepressant treatment, endocrinological parameters were evaluated and correlated with the clinical response to venlafaxine treatment, which offers a dual antidepressant action. Depressive patients with no other psychiatric pathology were evaluated with 17-item Hamilton Depression Scale (HAM-D) in order to follow-up the response to venlafaxine. After 1 wk of treatment, 60% of patients reduced their initial HAM-D score to at least 25%; this group was classified as early responders. The other group (40%) started to reduce significantly their HAM-D score after 3 wk of treatment and was classified as late responders. After 6 wk of treatment both groups have reduced HAM-D score to at least 25% of the baseline score. Prior to the pharmacological treatment, both early and late responders showed salivary cortisol rhythm and urinary free cortisol (UFC) in 24-h similar to healthy subjects. However, we did observe differences in basal ACTH secretion, showing that the late responder group had higher basal ACTH than both early responders and controls. The ddAVP challenge promoted a robust secretion of ACTH only in late responders, suggesting a different sensitivity of pituitary vasopressin receptor. The differences in clinical response to venlafaxine among depressive patients seem to be related to endocrinological parameters.
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Derler I, Hofbauer M, Kahr H, Fritsch R, Muik M, Kepplinger K, Hack ME, Moritz S, Schindl R, Groschner K, Romanin C. Dynamic but not constitutive association of calmodulin with rat TRPV6 channels enables fine tuning of Ca2+-dependent inactivation. J Physiol 2006; 577:31-44. [PMID: 16959851 PMCID: PMC2000671 DOI: 10.1113/jphysiol.2006.118661] [Citation(s) in RCA: 92] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
The Ca(2+)-selective TRPV6 as well as the L-type Ca(2+) channel are regulated by the Ca(2+)-binding protein calmodulin (CaM). Here, we investigated the interaction of CaM with rat (r)TRPV6 in response to alterations of intracellular Ca(2+), employing Ca(2+)-imaging and patch-clamp techniques. Additionally, confocal Förster resonance energy transfer (FRET) microscopy on living cells was utilized as a key method to visualize in vivo protein-protein interactions essential for CaM regulation of rTRPV6 activity. The effects of overexpressed CaM or its Ca(2+)-insensitive mutant (CaM(MUT)) was probed on various rTRPV6 mutants and fragments in an attempt to elucidate the molecular mechanism of Ca(2+)/CaM-dependent regulation and to pinpoint the physiologically relevant rTRPV6-CaM interaction site. A significant reduction of rTRPV6 activity, as well as an increase in current inactivation, were observed when CaM was overexpressed in addition to endogenous CaM. The Ca(2+)-insensitive CaM(MUT), however, failed to affect rTRPV6-derived currents. Accordingly, live cell confocal FRET microscopy revealed a robust interaction for CaM but not CaM(MUT) with rTRPV6, suggesting a strict Ca(2+) dependence for their association. Indeed, interaction of rTRPV6 or its C terminus with CaM increased with rising intracellular Ca(2+) levels, as observed by dynamic FRET measurements. An rTRPV6Delta(695-727) mutant with the very C-terminal end deleted, yielded Ca(2+) currents with a markedly reduced inactivation in accordance with a lack of CaM interaction as substantiated by FRET microscopy. These results, in contrast with those for CaM-dependent L-type Ca(2+) channel inactivation, demonstrate a dynamic association of CaM with the very C-terminal end of rTRPV6 (aa 695-727), and this enables acceleration of the rate of rTRPV6 current inactivation with increasing intracellular CaM concentrations.
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Friesen N, Fritsch R, Blattner F. Phylogeny and New Intrageneric Classification of Allium (Alliaceae) Based on Nuclear Ribosomal DNA ITS Sequences. ACTA ACUST UNITED AC 2006. [DOI: 10.5642/aliso.20062201.31] [Citation(s) in RCA: 190] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Stummvoll GH, Fritsch R, Meyer B, Aringer M, Smolen JS, Steiner G. Autoreactive T cells to histone H1 and core histones in patients with systemic lupus erythematosus. Arthritis Res Ther 2005. [PMCID: PMC2834137 DOI: 10.1186/ar1659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Kahr H, Schindl R, Fritsch R, Heinze B, Hofbauer M, Hack ME, Mörtelmaier MA, Groschner K, Peng JB, Takanaga H, Hediger MA, Romanin C. CaT1 knock-down strategies fail to affect CRAC channels in mucosal-type mast cells. J Physiol 2004; 557:121-32. [PMID: 15020691 PMCID: PMC1665038 DOI: 10.1113/jphysiol.2004.062653] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
CaT1, the calcium transport protein 1 encoded by TRPV6, is able to generate a Ca(2+) conductance similar but not identical to the classical CRAC current in mucosal-type mast cells. Here we show that CaT1-derived Ca(2+) entry into HEK293 cells is effectively inhibited either by expression of various dominant negative N-terminal fragments of CaT1 (N(334)-CaT1, N(198)-CaT1 and N(154)-CaT1) or by antisense suppression. By contrast, the endogenous CRAC current of the mast cells was unaffected by CaT1 antisense and siRNA knockdown but markedly suppressed by two (N(334)-CaT1, N(198)-CaT1) of the dominant negative N-CaT1 fragments. Inhibition of CRAC current was not an unspecific, toxic effect, as inward rectifier K(+) and MagNuM currents of the mast cells were not significantly affected by these N-CaT1 fragments. The shortest N(154)-CaT1 fragment inhibited CaT1-derived currents in mast cells, but failed to inhibit CRAC currents. Thus, the structural requirements of rCaT N-terminal fragments for inhibition of rCaT1 and CRAC channels are different. These results together with the lack of CaT1 antisense and siRNA effects on currents render it unlikely that CaT1 is a component of native CRAC channels in mast cells. The data further demonstrate a novel strategy for CRAC current inhibition by an N-terminal structure of CaT1.
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Fritsch R, Mohr W, Heiss R. Untersuchungen über die Aroma-Erhaltung bei der Trocknung von Lebensmitteln nach verschiedenen Verfahren. CHEM-ING-TECH 2004. [DOI: 10.1002/cite.330430709] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Araya R, Lewis G, Rojas G, Fritsch R. Education and income: which is more important for mental health? J Epidemiol Community Health 2003; 57:501-5. [PMID: 12821693 PMCID: PMC1732519 DOI: 10.1136/jech.57.7.501] [Citation(s) in RCA: 131] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
STUDY OBJECTIVE To assess which indicators of socioeconomic status are associated with an increased prevalence of common mental disorders. DESIGN Cross sectional household survey. SETTING Santiago, Chile. PARTICIPANTS Random sample of adults aged 16-65 residing in private households. MAIN RESULTS Less education (odds ratio 2.44, 95% confidence intervals 1.50 to 3.97), a recent income decrease (odds ratio 2.14, 1.70 to 2.70), and poor housing (odds ratio 1.53, 1.05 to 2.23), were the only socioeconomic status variables that remained significantly associated with an increased prevalence of common mental disorders after adjustments. The prevalence of common mental disorders was also higher among people with manual unskilled occupations, overcrowded housing, and lower per capita income but these associations disappeared after adjustment for other explanatory and confounding variables. CONCLUSIONS There is a strong, inverse, and independent association between education and common mental disorders. However, income was not associated with the prevalence of common mental disorders, after adjusting for other socioeconomic variables. Similar results have been found in other Latin American studies but British studies tend to find the opposite, that income but not education is associated with common mental disorders. Understanding the impact of socioeconomic factors on mental health requires research in poor as well as rich countries.
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Geisler F, Storr M, Fritsch R, Rösch T, Classen M, Allescher HD. Endoscopic treatment of a Zenker's diverticulum using argon plasma coagulation in a patient with massive cachexia and esophageal obstruction: a case report and review of literature. Dis Esophagus 2003; 15:180-5. [PMID: 12220429 DOI: 10.1046/j.1442-2050.2002.00231.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A case report is presented of an 86-year-old man in a very poor general condition with a 10-year history of a Zenker's diverticulum as a cause of a complete obstruction of the esophagus with subsequent aphagia and massive cachexia. Because of high surgical risk and contraindications to general anesthesia, an approach with the flexible endoscope to perform cricopharyngeal myotomy was undertaken. Several attempts with the flexible endoscope by experienced investigators had been performed until the esophageal inlet was intubated and argon plasma coagulation could be applied in several sessions to divide the tissue bridge between the esophagus and the Zenker diverticulum to successfully restore the pharyngoesophageal passage.
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Schett G, Monneaux F, Hoefler E, Fritsch R, Tohidast-Akrad M, Smolen J, Muller S, Steiner G. Autoantibodies to hnRNP-A2 in SLE: identification of disease-specific linear epitopes and correlation with disease activity and clinical features. Arthritis Res Ther 2003. [PMCID: PMC2833592 DOI: 10.1186/ar655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Fritsch R, Storr M, Geisler F, Kurjak M, Berger H, Rösch T, Allescher HD, Classen M. Simultaneous perforation of three major liver blood vessels by percutaneous transhepatic biliary drainage. Endoscopy 2002; 34:844. [PMID: 12244514 DOI: 10.1055/s-2002-34253] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
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Fritsch R, Eselböck D, Jahn-Schmid B, Neumueller J, Bohle B, Skriner K, Smolen J, Steiner G. Characterization of RA33 (hnRNP-A2/B1)-autoreactive T cells in SLE-patients. Arthritis Res Ther 2001. [PMCID: PMC3273193 DOI: 10.1186/ar228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Fritsch R, Eselböck D, Jahn-Schmid B, Scheinecker C, Bohle B, Skriner K, Neumüller J, Smolen J, Steiner G. Characterization of autoreactive T cells to the autoantigens hnRNP-A2/RA33 and filaggrin in patients with rheumatoid arthritis and controls. Arthritis Res Ther 2001. [PMCID: PMC3273279 DOI: 10.1186/ar223] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Kurjak M, Fritsch R, Saur D, Schusdziarra V, Allescher HD. Functional coupling between nitric oxide synthesis and VIP release within enteric nerve terminals of the rat: involvement of protein kinase G and phosphodiesterase 5. J Physiol 2001; 534:827-36. [PMID: 11483712 PMCID: PMC2278726 DOI: 10.1111/j.1469-7793.2001.00827.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
1. The subcellular mechanisms involved in the effect of nitric oxide (NO) on the release of vasoactive intestinal polypeptide (VIP) were examined in synaptosomes isolated from rat small intestine. 2. VIP release was stimulated by the NO donor SNAP (10(-7)-10(-4) M) in an oxyhaemoglobin-sensitive manner. The presence of the guanylate cyclase inhibitor ODQ (10(-5) M), or inhibition of protein kinase G (PKG) by KT 5823 (3 x 10(-6) M) or Rp-8Br-PET-cGMPS (5 x 10(-7) M), antagonized the SNAP-induced VIP release, suggesting a regulatory role of PKG, confirming previously published data from enteric ganglia. This finding was further supported by the fact that direct PKG activation by the stable cGMP analogue 8-pCPT-cGMP stimulated VIP secretion to the same extent as SNAP. 3. Basal VIP secretion was enhanced in the presence of zaprinast, an inhibitor of cGMP-dependent phosphodiesterase 5 (PDE 5), suggesting a functional role of PDE 5 in NO-cGMP signalling. Supportive evidence for this finding was obtained by demonstration of the presence of PDE 5 using RT-PCR. 4. Stimulation of endogenous NO production by L-arginine was also effective in releasing VIP. The effect was abolished in the presence of KT 5823, but was insensitive to oxyhaemoglobin (10(-3) M), suggesting that an interaction between NO and VIP is likely to occur within the same nerve terminal rather than between terminals. 5. NO synthesis was not affected by VIP (10(-8)-10(-5) M), suggesting that there is no feedback regulation between the NO and the VIP pathways. 6. These findings support the notion that an anatomical and functional interrelationship exists between NO and VIP in enteric nerve terminals and that complex signalling mechanisms involving PKG and PDE 5 contribute to NO-induced VIP release.
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Araya R, Rojas G, Fritsch R, Acuña J, Lewis G. Common mental disorders in Santiago, Chile: prevalence and socio-demographic correlates. Br J Psychiatry 2001; 178:228-33. [PMID: 11230033 DOI: 10.1192/bjp.178.3.228] [Citation(s) in RCA: 151] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
BACKGROUND There have been relatively few surveys in Latin America that have attempted to estimate the prevalence of psychiatric morbidity in private households. AIMS To determine the prevalence of common mental disorders and socio-demographic correlates among adults from Santiago, Chile. METHOD Cross-sectional survey of private households with a probabilistic sampling design was used. Common mental disorders were measured using the Clinical Interview Schedule-Revised (CIS-R). RESULTS Three thousand eight hundred and seventy adults were interviewed. Twenty-five per cent were CIS-R cases and 13% met criteria for an ICD-10 diagnosis. Low education, female gender, unemployment, separation, low social status and lone parenthood were associated with a higher prevalence. CONCLUSIONS Prevalence rates were higher than those found in urban areas of Great Britain, both for ICD-10 diagnoses and 'non-specific neurotic disorders'. Similar socio-demographic factors were associated with an increased prevalence of common mental disorders in Chile as in the UK. There is a need to unify methodologies to be able to compare results internationally.
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Kurjak M, Fritsch R, Saur D, Schusdziarra V, Allescher HD. NO releases bombesin-like immunoreactivity from enteric synaptosomes by cross-activation of protein kinase A. THE AMERICAN JOURNAL OF PHYSIOLOGY 1999; 276:G1521-30. [PMID: 10362657 DOI: 10.1152/ajpgi.1999.276.6.g1521] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
Abstract
The effect of nitric oxide (NO) on the release of bombesin-like immunoreactivity (BLI) was examined in synaptosomes of rat small intestine. The NO donor S-nitroso-N-acetylpenicillamine (SNAP; 10(-7) to 10(-4) M) significantly stimulated BLI release. In the presence of the NO scavenger oxyhemoglobin (10(-3) M) or the guanylate cyclase inhibitor ODQ (10(-5) M), SNAP-induced BLI release was antagonized. In addition, SNAP increased the synaptosomal cGMP content and elevation of cGMP levels by zaprinast (3 x 10(-5) M), an inhibitor of the cGMP-specific phosphodiesterase (PDE) type 5, and increased basal and SNAP-induced BLI release. NO-induced BLI release was blocked by Rp-adenosine 3',5'-cyclic monophosphorothioate (3 x 10(-5) M and 10(-4) M), an inhibitor of the cAMP-dependent protein kinase A, whereas KT-5823 (3 x 10(-6) M) and Rp-8-(4-chlorophenylthio)-cGMP (5 x 10(-5) M), inhibitors of the cGMP-dependent protein kinase G, had no effect. Because cGMP inhibits the cAMP-specific PDE3, thereby increasing cAMP levels, the role of PDE3 was investigated. Trequinsin (10(-8) M), a specific blocker of PDE3, stimulated basal BLI release but had no additive effect on NO-induced release, suggesting a similar mechanism of action. These data demonstrate that because of a cross-activation of cAMP-dependent protein kinase A by endogenous cGMP BLI can be released by NO from enteric synaptosomes.
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Lindek S, Fritsch R, Machtynger J, de Alarcón PA, Chagoyen M. Design and realization of an on-line database for multidimensional microscopic images of biological specimens. J Struct Biol 1999; 125:103-11. [PMID: 10222267 DOI: 10.1006/jsbi.1999.4092] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The BioImage database is a new scientific database for multidimensional microscopic images of biological specimens, which is available through the World Wide Web (WWW). The development of this database has followed an iterative approach, in which requirements and functionality have been revised and extended. The complexity and innovative use of the data meant that technical and biological expertise has been crucial in the initial design of the data model. A controlled vocabulary was introduced to ensure data consistency. Pointers are used to reference information stored in other databases. The data model was built using InfoModeler as a database design tool. The database management system is the Informix Dynamic Server with Universal Data Option. This object-relational system allows the handling of complex data using features such as collection types, inheritance, and user-defined data types. Informix datablades are used to provide additional functionality: the Web Integration Option enables WWW access to the database; the Video Foundation Blade provides functionality for video handling.
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Carazo JM, Stelzer EH, Engel A, Fita I, Henn C, Machtynger J, McNeil P, Shotton DM, Chagoyen M, de Alarcón PA, Fritsch R, Heymann JB, Kalko S, Pittet JJ, Rodriguez-Tomé P, Boudier T. Organising multi-dimensional biological image information: the BioImage Database. Nucleic Acids Res 1999; 27:280-3. [PMID: 9847201 PMCID: PMC148156 DOI: 10.1093/nar/27.1.280] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Nowadays it is possible to unravel complex information at all levels of cellular organization by obtaining multi-dimensional image information. At the macromolecular level, three-dimensional (3D) electron microscopy, together with other techniques, is able to reach resolutions at the nanometer or subnanometer level. The information is delivered in the form of 3D volumes containing samples of a given function, for example, the electron density distribution within a given macromolecule. The same situation happens at the cellular level with the new forms of light microscopy, particularly confocal microscopy, all of which produce biological 3D volume information. Furthermore, it is possible to record sequences of images over time (videos), as well as sequences of volumes, bringing key information on the dynamics of living biological systems. It is in this context that work on BioImage started two years ago, and that its first version is now presented here. In essence, BioImage is a database specifically designed to contain multi-dimensional images, perform queries and interactively work with the resulting multi-dimensional information on the World Wide Web, as well as accomplish the required cross-database links. Two sister home pages of BioImage can be accessed at http://www. bioimage.org and http://www-embl.bioimage.org
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Jensen-Jarolim E, Reider N, Fritsch R, Breiteneder H. Fatal outcome of anaphylaxis to camomile-containing enema during labor: a case study. J Allergy Clin Immunol 1998; 102:1041-2. [PMID: 9847448 DOI: 10.1016/s0091-6749(98)70345-8] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Crépat G, Fritsch R. Satellite meeting of IUTOX VIIIth International Congress of Toxicology Carbon Monoxide: the unnoticed poison of the 21st century. Hum Exp Toxicol 1998. [DOI: 10.1191/096032798678908099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Weil M, Litzke LF, Fritsch R. [Diagnostic validity of thermography of lameness in horses]. Tierarztl Prax Ausg G Grosstiere Nutztiere 1998; 26:346-54. [PMID: 9857414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
Thirty-six lameness free horses and 119 horses with lameness of the distal forelimb including the carpus were evaluated through thermography. Examination was done with an infrared thermography camera "Thermovision 470" and a specially developed analyzing software program. Temperature differences between corresponding regions of the left and right forelimb were determined and scrutinized statistically between various lameness groups. By creating temperature differences between both limbs a parameter for skin temperature was found which is independent of surrounding temperature. In lameness free horses skin temperature was contralaterally symmetric and there was no significant temperature difference between left and right limb. A significant (p < 0.01) temperature difference of all regions in comparison to lameness free horses was demonstrated in diseases like navicular disease, pododermatitis and tendopathia. Horses with a diagnosis of coffin bone fracture and arthropathia showed a significant (p < 0.05) temperature difference in almost all regions compared to controls, whereas horses with laminitis and periostitis did not show a significant difference. Loss of symmetric distribution of skin temperature could be demonstrated between affected and non-affected regions. Thermography can show and quantitatively prove very well changes in skin temperature in forelimb lameness. It must be emphasized that thermography in lameness diagnosis of horses is only useful in combination with a thorough clinical examination including additional examination procedures.
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Fritsch R, Bohle B, Vollmann U, Wiedermann U, Jahn-Schmid B, Krebitz M, Breiteneder H, Kraft D, Ebner C. Bet v 1, the major birch pollen allergen, and Mal d 1, the major apple allergen, cross-react at the level of allergen-specific T helper cells. J Allergy Clin Immunol 1998; 102:679-86. [PMID: 9802379 DOI: 10.1016/s0091-6749(98)70287-8] [Citation(s) in RCA: 95] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
BACKGROUND Food allergy to apple is frequent in individuals allergic to tree pollen. The major allergens of birch, Bet v 1, and apple, Mal d 1, have been cloned and sequenced and display a high degree of sequence identity, leading to IgE cross-reactivity. OBJECTIVE We sought to investigate cross-reactivity between Bet v 1 and Mal d 1 at the level of allergen-specific T lymphocytes. METHODS PBMCs of 13 patients allergic to birch pollen with oral allergy syndrome to apple were stimulated with rBet v 1 and rMal d 1, respectively, thereby establishing allergen-specific T-cell lines and T-cell clones. rMal d 1-specific T-cell cultures were tested for reactivity with rBet v 1, and rBet v 1-specific T cells were analyzed for reactivity with apple allergen. Cytokine production patterns in response to specific stimulation were evaluated. A selection of cross-reacting T-cell clones was mapped for epitope specificity by the use of overlapping Bet v 1- derived peptides. RESULTS Nineteen Mal d 1-specific T-cell clones were produced, 79% of which cross-reacted with Bet v 1. Eight of 18 Bet v 1-specific T-cell clones cross-reacted with Mal d 1. Six peptides representing cross-reactive T-cell epitopes could be identified. The respective fragments from birch and apple displayed approximately 50% amino acid identity. Seventy percent of the cross-reactive T-cell clones revealed a T(H2)-like cytokine production pattern. CONCLUSION The results indicate that cross-reactivity between apple and birch pollen leading to the clinical oral allergy syndrome occurs not only at the serologic, but also at the cellular level.
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