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Cell wall modifications by α-XYLOSIDASE1 are required for control of seed and fruit size in Arabidopsis. JOURNAL OF EXPERIMENTAL BOTANY 2022; 73:1499-1515. [PMID: 34849721 DOI: 10.1093/jxb/erab514] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Accepted: 11/21/2021] [Indexed: 06/13/2023]
Abstract
Cell wall modifications are of pivotal importance during plant development. Among cell wall components, xyloglucans are the major hemicellulose polysaccharide in primary cell walls of dicots and non-graminaceous monocots. They can connect the cellulose microfibril surface to affect cell wall mechanical properties. Changes in xyloglucan structure are known to play an important role in regulating cell growth. Therefore, the degradation of xyloglucan is an important modification that alters the cell wall. The α-XYLOSIDASE1 (XYL1) gene encodes the only α-xylosidase acting on xyloglucans in Arabidopsis thaliana. Here, we showed that mutation of XYL1 strongly influences seed size, seed germination, and fruit elongation. We found that the expression of XYL1 is directly regulated in developing seeds and fruit by the MADS-box transcription factor SEEDSTICK. We demonstrated that XYL1 complements the stk smaller seed phenotype. Finally, by atomic force microscopy, we investigated the role of XYL1 activity in maintaining cell stiffness and growth, confirming the importance of cell wall modulation in shaping organs.
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Correction: The 1ALCTL and 1BLCTL isoforms of Arg/Abl2 induce fibroblast activation and extra cellular matrix remodelling differently. Biol Open 2021; 10:261776. [PMID: 34184728 PMCID: PMC8214730 DOI: 10.1242/bio.058751] [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: 11/22/2022] Open
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ETNK1 mutations induce a mutator phenotype that can be reverted with phosphoethanolamine. Nat Commun 2020; 11:5938. [PMID: 33230096 PMCID: PMC7684297 DOI: 10.1038/s41467-020-19721-w] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Accepted: 10/27/2020] [Indexed: 11/09/2022] Open
Abstract
Recurrent somatic mutations in ETNK1 (Ethanolamine-Kinase-1) were identified in several myeloid malignancies and are responsible for a reduced enzymatic activity. Here, we demonstrate in primary leukemic cells and in cell lines that mutated ETNK1 causes a significant increase in mitochondrial activity, ROS production, and Histone H2AX phosphorylation, ultimately driving the increased accumulation of new mutations. We also show that phosphoethanolamine, the metabolic product of ETNK1, negatively controls mitochondrial activity through a direct competition with succinate at mitochondrial complex II. Hence, reduced intracellular phosphoethanolamine causes mitochondria hyperactivation, ROS production, and DNA damage. Treatment with phosphoethanolamine is able to counteract complex II hyperactivation and to restore a normal phenotype.
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Characterizing microfluidic approaches for a fast and efficient reagent exchange in single-molecule studies. Sci Rep 2020; 10:18069. [PMID: 33093484 PMCID: PMC7581773 DOI: 10.1038/s41598-020-74523-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Accepted: 09/21/2020] [Indexed: 11/09/2022] Open
Abstract
Single-molecule experiments usually take place in flow cells. This experimental approach is essential for experiments requiring a liquid environment, but is also useful to allow the exchange of reagents before or during measurements. This is crucial in experiments that need to be triggered by ligands or require a sequential addition of proteins. Home-fabricated flow cells using two glass coverslips and a gasket made of paraffin wax are a widespread approach. The volume of the flow cell can be controlled by modifying the dimensions of the channel while the reagents are introduced using a syringe pump. In this system, high flow rates disturb the biological system, whereas lower flow rates lead to the generation of a reagent gradient in the flow cell. For very precise measurements it is thus desirable to have a very fast exchange of reagents with minimal diffusion. We propose the implementation of multistream laminar microfluidic cells with two inlets and one outlet, which achieve a minimum fluid switching time of 0.25 s. We additionally define a phenomenological expression to predict the boundary switching time for a particular flow cell cross section. Finally, we study the potential applicability of the platform to study kinetics at the single molecule level.
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Cooperative effects on the compaction of DNA fragments by the nucleoid protein H-NS and the crowding agent PEG probed by Magnetic Tweezers. Biochim Biophys Acta Gen Subj 2020; 1864:129725. [PMID: 32891648 DOI: 10.1016/j.bbagen.2020.129725] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Revised: 07/22/2020] [Accepted: 08/30/2020] [Indexed: 11/30/2022]
Abstract
BACKGROUND DNA bridging promoted by the H-NS protein, combined with the compaction induced by cellular crowding, plays a major role in the structuring of the E. coli genome. However, only few studies consider the effects of the physical interplay of these two factors in a controlled environment. METHODS We apply a single molecule technique (Magnetic Tweezers) to study the nanomechanics of compaction and folding kinetics of a 6 kb DNA fragment, induced by H-NS bridging and/or PEG crowding. RESULTS In the presence of H-NS alone, the DNA shows a step-wise collapse driven by the formation of multiple bridges, and little variations in the H-NS concentration-dependent unfolding force. Conversely, the DNA collapse force observed with PEG was highly dependent on the volume fraction of the crowding agent. The two limit cases were interpreted considering the models of loop formation in a pulled chain and pulling of an equilibrium globule respectively. CONCLUSIONS We observed an evident cooperative effect between H-NS activity and the depletion of forces induced by PEG. GENERAL SIGNIFICANCE Our data suggest a double role for H-NS in enhancing compaction while forming specific loops, which could be crucial in vivo for defining specific mesoscale domains in chromosomal regions in response to environmental changes.
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Effect of intracoronary bone marrow-derived mononuclear cell injection early and late after myocardial infarction on CMR-derived myocardial strain. Int J Cardiol 2020; 310:108-115. [DOI: 10.1016/j.ijcard.2020.01.025] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Revised: 12/20/2019] [Accepted: 01/13/2020] [Indexed: 11/24/2022]
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P4726Functional mitral regurgitation treated with percutaneous repair: a relative survival analysis of a national Swiss cohort. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz745.1103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Introduction
Percutaneous treatment of functional mitral regurgitation (FMR) with MitraClip (MC) has led to discordant results in recent randomized clinical trials. We aimed at estimating excess mortality (EM) and to evaluate its predictors in a large Swiss FMR population treated with MC.
Methods
FMR patients enrolled in the MitraSwiss Registry (479 pts) with a mean age of 74.7±9.42 years were evaluated. We computed and plotted EM up to 5 years after implant using the Swiss 2008–20013 mortality tables, stratified by age and sex. A Poisson regression was used to model EM as a function of age, sex, pre-implant RV/RA gradient, calendar period (2011–2013; 2014–2015,2016–2017), ischemic vs non ischemic aetiology, acute procedural success and residual MR.
Results
Patient's survival at 1,2,3,4 and 5 years were respectively 0.84, 0.72, 0.59, 0.53 and 0.48. FMR patients treated with MC showed excess mortality of +13% (95% CI,10%-18%), +22% (95% CI,17%-28%), +34% (95% CI,27%-41%), +37% (95% CI,28%-46%) and +39% (95% CI,28%-50%) at each time point as compared to the Swiss population, with not differences over the entire follow up (p=0.481). Age group, sex, RV/RA gradient calendar period, ischemic vs non ischemic and residual MR were not associated with excess mortality while a clear association was recognized with acute procedural success (p=0.011).
Conclusions
In FMR patients treated with MC a persistent EM was observed at a 5 years follow up. Acute procedural success is the only determinant of EM with a 65% lower EM as compared to procedural failures.
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The Extent of Human Apolipoprotein A-I Lipidation Strongly Affects the β-Amyloid Efflux Across the Blood-Brain Barrier in vitro. Front Neurosci 2019; 13:419. [PMID: 31156358 PMCID: PMC6532439 DOI: 10.3389/fnins.2019.00419] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Accepted: 04/11/2019] [Indexed: 12/20/2022] Open
Abstract
Much evidence suggests a protective role of high-density lipoprotein (HDL) and its major apolipoprotein apoA-I, in Alzheimer’s disease (AD). The biogenesis of nascent HDL derived from a first lipidation of apoA-I, which is synthesized by the liver and intestine but not in the brain, in a process mediated by ABCA1. The maturation of nascent HDL in mature spherical HDL is due to a subsequent lipidation step, LCAT-mediated cholesterol esterification, and the change of apoA-I conformation. Therefore, different subclasses of apoA-I-HDL simultaneously exist in the blood circulation. Here, we investigated if and how the lipidation state affects the ability of apoA-I-HDL to target and modulate the cerebral β-amyloid (Aβ) content from the periphery, that is thus far unclear. In particular, different subclasses of HDL, each with different apoA-I lipidation state, were purified from human plasma and their ability to cross the blood-brain barrier (BBB), to interact with Aβ aggregates, and to affect Aβ efflux across the BBB was assessed in vitro using a transwell system. The results showed that discoidal HDL displayed a superior capability to promote Aβ efflux in vitro (9 × 10-5 cm/min), when compared to apoA-I in other lipidation states. In particular, no effect on Aβ efflux was detected when apoA-I was in mature spherical HDL, suggesting that apoA-I conformation, and lipidation could play a role in Aβ clearance from the brain. Finally, when apoA-I folded its structure in discoidal HDL, rather than in spherical ones, it was able to cross the BBB in vitro and strongly destabilize the conformation of Aβ fibrils by decreasing the order of the fibril structure (-24%) and the β-sheet content (-14%). These data suggest that the extent of apoA-I lipidation, and consequently its conformation, may represent crucial features that could exert their protective role in AD pathogenesis.
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The 1ALCTL and 1BLCTL isoforms of Arg/Abl2 induce fibroblast activation and extra cellular matrix remodelling differently. Biol Open 2019; 8:bio.038554. [PMID: 30837227 PMCID: PMC6451347 DOI: 10.1242/bio.038554] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
The fibrotic tissue and the stroma adjacent to cancer cells are characterised by the presence of activated fibroblasts (myofibroblasts) which play a role in creating a supportive tissue characterised by abundant extracellular matrix (ECM) secretion. The myofibroblasts remodel this tissue through secreted molecules and modulation of their cytoskeleton and specialized contractile structures. The non-receptor protein tyrosine kinase Arg (also called Abl2) has the unique ability to bind directly to the actin cytoskeleton, transducing diverse extracellular signals into cytoskeletal rearrangements. In this study we analysed the 1ALCTL and 1BLCTL Arg isoforms in Arg−/− murine embryonal fibroblasts (MEF) cell line, focusing on their capacity to activate fibroblasts and to remodel ECM. The results obtained showed that Arg isoform 1BLCTL has a major role in proliferation, migration/invasion of MEF and in inducing a milieu able to modulate tumour cell morphology, while 1ALCTL isoform has a role in MEF adhesion maintaining active focal adhesions. On the whole, the presence of Arg in MEF supports the proliferation, activation, adhesion, ECM contraction and stiffness, while the absence of Arg affected these myofibroblast features. This article has an associated First Person interview with the first author of the paper. Summary: The non-receptor tyrosine kinase Arg and its isoforms modulate the extra cellular matrix production that is relevant in fibrosis and tumour growth, this may open future novel therapeutic approaches.
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Nanomechanics of Diaminopurine-Substituted DNA. Biophys J 2019; 116:760-771. [PMID: 30795872 DOI: 10.1016/j.bpj.2019.01.027] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Revised: 01/23/2019] [Accepted: 01/24/2019] [Indexed: 10/27/2022] Open
Abstract
2,6-diaminopurine (DAP) is a nucleobase analog of adenine. When incorporated into double-stranded DNA (dsDNA), it forms three hydrogen bonds with thymine. Rare in nature, DAP substitution alters the physical characteristics of a DNA molecule without sacrificing sequence specificity. Here, we show that in addition to stabilizing double-strand hybridization, DAP substitution also changes the mechanical and conformational properties of dsDNA. Thermal melting experiments reveal that DAP substitution raises melting temperatures without diminishing sequence-dependent effects. Using a combination of atomic force microscopy (AFM), magnetic tweezer (MT) nanomechanical assays, and circular dichroism spectroscopy, we demonstrate that DAP substitution increases the flexural rigidity of dsDNA yet also facilitates conformational shifts, which manifest as changes in molecule length. DAP substitution increases both the static and dynamic persistence length of DNA (measured by AFM and MT, respectively). In the static case (AFM), in which tension is not applied to the molecule, the contour length of DAP-DNA appears shorter than wild-type (WT)-DNA; under tension (MT), they have similar dynamic contour lengths. At tensions above 60 pN, WT-DNA undergoes characteristic overstretching because of strand separation (tension-induced melting) and spontaneous adoption of a conformation termed S-DNA. Cyclic overstretching and relaxation of WT-DNA at near-zero loading rates typically yields hysteresis, indicative of tension-induced melting; conversely, cyclic stretching of DAP-DNA showed little or no hysteresis, consistent with the adoption of the S-form, similar to what has been reported for GC-rich sequences. However, DAP-DNA overstretching is distinct from GC-rich overstretching in that it happens at a significantly lower tension. In physiological salt conditions, evenly mixed AT/GC DNA typically overstretches around 60 pN. GC-rich sequences overstretch at similar if not slightly higher tensions. Here, we show that DAP-DNA overstretches at 52 pN. In summary, DAP substitution decreases the overall stability of the B-form double helix, biasing toward non-B-form DNA helix conformations at zero tension and facilitating the B-to-S transition at high tension.
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Experimentally Motivated Sequence-Dependent Models of Melting and Overstretching for Diaminopurine-Substituted DNA. Biophys J 2018. [DOI: 10.1016/j.bpj.2017.11.524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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Abstract
Intermittent rivers are an increasing share of the world's river network, but current models don't include them. One research network is gathering knowledge about these rivers from around the world.
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[Functional dyspepsia and the satiety test: its usefulness in clinical practice]. REVISTA DE GASTROENTEROLOGÍA DE MÉXICO 2013; 78:127-34. [PMID: 23938047 DOI: 10.1016/j.rgmx.2013.06.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2013] [Revised: 06/05/2013] [Accepted: 06/21/2013] [Indexed: 12/13/2022]
Abstract
INTRODUCTION According to the Rome III Criteria, functional dyspepsia (FD) is classified as postprandial distress syndrome (PDS) and epigastric pain syndrome (EPS). On the other hand, the satiety test (ST) has been used to evaluate gastric accommodation and emptying, distinguishing healthy individuals from those with dyspepsia. AIMS To determine whether the ST can distinguish dyspeptic individuals from healthy ones and to evaluate its usefulness in differentiating the two FD subtypes. METHODS Adults with FD were consecutively enrolled in a cross-sectional study within the time frame of August 2011 and October 2012. Healthy subjects participated as controls. The ST consisted of the intake of a nutritional supplement (Fortisip®, Nutricia Bagó®) at a constant speed; satiety was graded at 5-minute intervals (1 to 5 points). Intake was suspended when the maximum score was reported. The total ingested volume and caloric intake was recorded and the Mann-Whitney U test was used in the statistical analysis. RESULTS The study included 39 dyspeptic patients and 20 control individuals. The patients were predominantly women (84.6 vs. 25%; p < 0.0001) and they were similar in age (39.59 ± 13.53 vs. 34.70 ± 9.85 years) and BMI (24.32 ± 3.52 vs. 25.82 ± 3.34 kg/m2) with respect to the controls. The FD subtype percentages were PDS: 61%, EPS: 31%, and Mixed syndrome: 8%. There was a lower ingested volume and caloric intake on the part of the dyspeptic patients (185 vs. 300 ml and 277 vs. 520 Kcal, respectively. Both: P<.001). No differences in the ST were observed between the two pure dyspepsia subtypes. CONCLUSIONS There was a difference in the ST between healthy individuals and those with dyspepsia, but the ingested volume and caloric intake in the two FD subtypes were similar.
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Long-term patient benefit with biodegradable polymer biolimus eluting stent. Minerva Cardioangiol 2012; 60:629-636. [PMID: 23147439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The introduction of bare metal stents in the early 1990 and of 1st generation drug eluting stents (DES) in the early 2000 defined a new era in interventional cardiology. DES dramatically reduced instant restenosis and the need of revascularization after percutaneous coronary intervention. However, this increased efficacy came at the cost of delayed vascular healing and subsequent late adverse event such as late stent thrombosis. Second generation DES appears even more efficient and safer than 1st generation DES, providing exciting perspectives for the near future. A new era has started with the development of bio-absorbable polymers. Biodegradable polymer eluting stents, such as the biolimus A9 eluting stent showed non-inferiority to durable polymer sirolimus eluting stent and, by reducing the risk of cardiac events associated with very late stent thrombosis, might improve long-term clinical outcomes in a variety of patients including chronic stable coronary artery disease and acute coronary syndromes. Biodegradable polymer DES are more likely to define the 3rd generation DES. The goal of future development is to further increase safety and efficacy of DES.
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Saturday, 25 August 2012. Eur Heart J 2012. [DOI: 10.1093/eurheartj/ehs280] [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: 11/13/2022] Open
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Feasibility of the Engager aortic transcatheter valve system using a flexible over-the-wire design. Eur J Cardiothorac Surg 2012; 42:e48-52. [DOI: 10.1093/ejcts/ezs389] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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A hybrid ICD extraction approach using laser and transfemoral extraction technique. QJM 2012; 105:265-8. [PMID: 21262740 DOI: 10.1093/qjmed/hcq256] [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: 11/13/2022] Open
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Progression of human carotid and femoral atherosclerosis: a prospective follow-up study by magnetic resonance vessel wall imaging. Eur Heart J 2011; 33:230-7. [DOI: 10.1093/eurheartj/ehr332] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
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[Cocoa--a literature survey]. PRAXIS 2008; 97:443-446. [PMID: 18551915 DOI: 10.1024/1661-8157.97.8.443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Schokolade hat sowohl in der Zahnheilkunde als auch in der Humanmedizin nach wie vor einen schlechten Ruf und wurde für Karies, Übergewicht und dessen Folgen – Bluthochdruck und Diabetes – verantwortlich gemacht. Aktuell scheint die süsse Sünde wieder auf dem Weg zu ihrer Rehabilitierung zu sein. Kürzlich konnte gezeigt werden, dass dunkle Schokolade unter gewissen Umständen zu einer Verbesserung wichtiger Surrogatmarker der Atherosklerose wie der Endothel- und Plättchenfunktion führen kann. Zusätzlich zeichnet sich ab, dass sich Schokolade auch positiv auf den Blutdruck, die Plasmalipide und sogar auf die Insulinresistenz auswirkt. Diese günstigen Effekte sind vermutlich am ehesten durch antioxidative und NO-abhängige Mechanismen zu erklären.
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Effects of Percutaneous Transluminal Angioplasty and Endovascular Brachytherapy on Vascular Remodeling of Human Femoropopliteal Artery: 2 Years Follow-up by Noninvasive Magnetic Resonance Imaging. J Vasc Surg 2007. [DOI: 10.1016/j.jvs.2007.08.042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Effects of percutaneous transluminal angioplasty and endovascular brachytherapy on vascular remodeling of human femoropopliteal artery: 2 years follow-up by noninvasive magnetic resonance imaging. Eur J Vasc Endovasc Surg 2007; 34:416-23. [PMID: 17689112 DOI: 10.1016/j.ejvs.2007.05.017] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2007] [Accepted: 05/19/2007] [Indexed: 11/19/2022]
Abstract
OBJECTIVES We aimed to assess in vivo the long-term effects of percutaneous transluminal angioplasty (PTA) and endovascular brachytherapy (EVBT) on vessel wall by serial MRI. METHODS Twenty patients with symptomatic stenosis of the femoropopliteal artery were randomly assigned to PTA (n=10) or PTA+EVBT (n=10, 14Gy by gamma-source). High-resolution MRI was performed prior, at 24-hours, 3-months, and 24-months after intervention. MRI data were analyzed by an independent, blinded observer. RESULTS The effects of both procedures on vessel wall at 24-hours and 3-months have been reported. Despite similar percent decrease in lumen area between 3- and 24-months in both groups (-8% for PTA and -11% for PTA+EVBT), at 24-months lumen area gain compared to baseline was +30% in PTA versus +82% in PTA+EVBT (p<0.05). Total vessel area, which was increased at 24-hours and 3-months, returned to pre-treatment value in both groups. CONCLUSIONS We demonstrated non-invasively that restenosis and inward remodeling after PTA are delayed by EVBT. At 24-months, patients treated with brachytherapy have larger lumen than those treated with PTA alone. The decrease in luminal and total vessel area between 3- and 24-months after EVBT indicates that the restenotic and remodeling process is not abolished but delayed with this therapy.
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Tu-P7:169 Swiss dark chocolate improves endothelial and platelet function. ATHEROSCLEROSIS SUPP 2006. [DOI: 10.1016/s1567-5688(06)80875-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Abstract
With the development of multidetector computed tomography and the improvement in the capabilities of workstations, the use of high-quality three-dimensional reconstructions and virtual images can be applied to organs other than the colon such as the stomach. As a noninvasive technique, virtual gastroscopy represents an alternative to conventional endoscopy for the detection of elevated lesions. Findings of this technique are illustrated.
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Das süße Geheimnis der dunklen Schokolade. THERAPEUTISCHE UMSCHAU 2005; 62:635-7. [PMID: 16218501 DOI: 10.1024/0040-5930.62.9.635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Dunkelschokolade ist seit Jahrhunderten für ihren Geschmack, aber auch für ihre gesundheitsförderlichen Wirkungen bekannt. Verantwortlich für die positiven Effekte ist die heterogene Gruppe der Polyphenole. Der Polyphenol-Gehalt steigt parallel zum Kakaogehalt, weswegen sich die Dunkelschokolade deutlich in der Wirkung von Milchschokolade abhebt. Neben antioxidativen Wirkungen besitzen Polyphenole auch immunmodulatorische Effekte und können die primäre Hämostase wie auch die Plättchenaktivierung und -aggregation hemmen.
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Abstract
Der Genuss von Kaffee, dem weltweit am weitesten verbreiteten Getränk, wurde in den Vergangenheit immer wieder als möglicher kardiovaskulärer Risikofaktor diskutiert. Deutliche Beweise dafür aber fehlen und neuere Studien lassen sogar einen eher günstigen Effekt vermuten. Trotz vielfältiger Untersuchungen konnte bis heute keine klare Assoziation zwischen Kaffee-Genuss und dem Risiko für eine arterielle Hypertonie, Myokardinfarkt und andere kardiovaskuläre Krankheiten bewiesen werden. Im Gegensatz zu den früheren Theorien weisen die neusten Publikationen darauf hin, dass mäßiger Kaffeegenuss kein konkretes gesundheitliches Risiko darstellt und sogar eine gewisse protektive Wirkung hat.
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Abstract
OBJECTIVE To investigate the feasibility of targeting various areas of left ventricle myocardium under real time magnetic resonance (MR) imaging with a customised injection catheter equipped with a miniaturised coil. DESIGN A needle injection catheter with a mounted resonant solenoid circuit (coil) at its tip was designed and constructed. A 1.5 T MR scanner with customised real time sequence combined with in-room scan running capabilities was used. With this system, various myocardial areas within the left ventricle were targeted and injected with a gadolinium-diethylenetriaminepentaacetic acid (DTPA) and Indian ink mixture. RESULTS Real time sequencing at 10 frames/s allowed clear visualisation of the moving catheter and its transit through the aorta into the ventricle, as well as targeting of all ventricle wall segments without further image enhancement techniques. All injections were visualised by real time MR imaging and verified by gross pathology. CONCLUSION The tracking device allowed real time in vivo visualisation of catheters in the aorta and left ventricle as well as precise targeting of myocardial areas. The use of this real time catheter tracking may enable precise and adequate delivery of agents for tissue regeneration.
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Integration of vascular biology and magnetic resonance imaging in the understanding of atherothrombosis and acute coronary syndromes. J Thromb Haemost 2003; 1:1410-21. [PMID: 12871275 DOI: 10.1046/j.1538-7836.2003.00271.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The interaction between the vulnerable atherosclerotic plaque prone to disruption and thrombus formation is the cornerstone of acute coronary syndrome (ACS). Although distinct from one another, the atherosclerotic and thrombotic processes appear to be interdependent, hence the term atherothrombosis. Inflammation is a crucial common pathophysiological mechanism. Overall, the association of plaque vulnerability and ACS has been well documented. Given the multifactorial origin of atherothrombosis the best preventive approach should be aggressive management of all the risk factors. New interventions should be directed toward decreasing vulnerability of the lesions thereby decreasing the risk of ACS.
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[Virtual Colonoscopy. Experience in 500 patients]. ACTA GASTROENTEROLOGICA LATINOAMERICANA 2003; 33:145-9. [PMID: 14708463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/27/2023]
Abstract
OBJECTIVE To show our experience and results in Virtual Colonoscopy (VC). MATERIAL AND METHOD Five hundred patients with personal or familial history of colorectal carcinoma and/or adenomas, or any kind of coloproctologic symptoms were studied. VCs were practiced using a helical CT scanner (300 patients) and a multislice CT scanner (200 patients) a few hours after Conventional Colonoscopy (CC), considered the gold standard. The patients were evaluated in a prospective blind study, to determine sensitivity and specificity of VC. Findings were classified as: 1) normal studies; 2) studies with pathological findings. This one was subdivided into: 2a) Lesions below 5 mm., 2b) Lesions between 5-9 mm., 2c) Lesions above 9 mm. RESULTS VC detected 253 normal studies whereas CC only detected 233. The sensitivity and specificity for each subgroup were: 2a) 87.8% and 86.9%; 2b) 95.6% and 91.4%; 2c) 100.0% and 100.0% respectively. CONCLUSION VC is a feasible and useful method for evaluating the entire colon. It is well tolerated, it has no complications and a high sensitivity and specificity for elevated lesions, especially the ones above or equal to 5 mm.
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[Acid-supressing capacity of omeprazole 20 mg tablets vs pantoprazole 20 and 40 mg tablets. A pilot study in volunteers]. ACTA GASTROENTEROLOGICA LATINOAMERICANA 2003; 33:199-203. [PMID: 14708472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/27/2023]
Abstract
OBJECTIVE To compare the acid-supressing capacity of omeprazole (OZ) 20 mg tablets vs pantoprazole (PZ) 20 and 40 mg tablets, in healthy volunteers, with 24-h intragastric pH-metry. MATERIAL AND METHODS Open, randomized, cross-over trial in 10 healthy volunteers; on days 0.8 and 22, 24-h intragastric pH-metry. Day 0, basal, thereafter 7 days with OZ or PZ 20 mg/day; day 8, pH-metry, then "wash out" for 7 days and thereafter 7 more days' therapy with PZ or OZ. On day 22 a 24-h intragastric pH control was performed again. In the last treatment stage, all of them were administered pantoprazole 40 mg/day for 8 days again with a 24-h pH recording at the end. RESULTS 24-h pH-metry expressed as the time (hours) in which the pH was < or = 4 and the values as mean +/- standard deviation. BASAL 22.12 +/- 1.54, POST-OZ 9.78 +/- 6.72, POST-PZ 20 15.65 +/- 5.65, POST-PZ 40 8.57 +/- 5.93. Statistical evaluation with two way repeated measures ANOVA p < 0.0001. Newman Keuls post-hoc test: (1) vs (2) p < 0.003; (1) vs (3) p < 0.03; (2) vs (4) 0.65. CONCLUSIONS According to the results it might be stated that both proton pump inhibitors have acid-supressing capacity and omeprazole in equal dosis is more effective than pantoprazole as acid-supressor, with statistically significative differences. There was no difference between 20 mg omeprazole and 40 mg pantoprazole.
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[Primary esophageal lymphoma in a patient with AIDS]. ACTA GASTROENTEROLOGICA LATINOAMERICANA 2003; 33:155-8. [PMID: 14708465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/27/2023]
Abstract
Primary esophageal lymphomas are extremely rare. We report a primary esophageal T cell lymphoma of a diffuse large cell phenotype B in a patient with AIDS. Also we reviewed other published cases. The diagnosis of this complication should be considered in HIV seropositive patients with progressive displagia and endoscopic findings of masses, polyps or ulcerations and, specially in those unresponsive to antifungal or antiviral therapy. Biopsy and histopathologic studies are needed to confirm the diagnosis.
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[Virtual gastroscopy. Preliminary experience]. ACTA GASTROENTEROLOGICA LATINOAMERICANA 2002; 32:11-5. [PMID: 12136685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
OBJECTIVE To define the role of virtual gastroscopy (VG) in the detection of elevated lesions comparing its results with conventional endoscopy (CE) as the gold standard method. MATERIALS AND METHODS Between December 2000 and July 2001, 19 patients were evaluated. The age ranged between 41 and 72 (mean 58.8 years old). VG and CE were performed in all the patients during the same week. VG were carried out with a multislice CT scanner (Mx 8000, Marconi Medical Systems). The technical parameters used were 3 mm with slices and 1.5 mm reconstruction intervals. The acquisition time was 22 seconds. Images were sent to a workstation (MxView, Marconi Medical Systems) where they were reprocessed in three different ways: 1) Bidimensionally 2) Tridimensionally 3) Virtual Endoscopy Findings of VG were compared with CE. RESULTS VG detected 39 lesions, whereas CE detected 40 lesions. There were 39 true-positive findings, 2 true-negative findings, 0 false-positive findings and 1 false-negative findings. The Sensitivity (Se) was 97.5%; Specificity (Sp) was 100%, positive predictive value 100% and Negative predictive value 66%. CONCLUSIONS VG is a new non-invasive method with high Se and Sp in the detection of elevated lesions. The actual role of VG consist in identification of gastric lesions and possibility to diagnose gastric disease.
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New understanding of atherosclerosis (clinically and experimentally) with evolving MRI technology in vivo. Ann N Y Acad Sci 2001; 947:181-95; discussion 195-8. [PMID: 11795266 DOI: 10.1111/j.1749-6632.2001.tb03940.x] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Atherosclerosis and its thrombotic complications are the major cause of morbidity and mortality in industrialized countries. Despite advances in our understanding of the pathogenetic mechanisms and new treatment modalities, the absence of an adequate noninvasive method for early detection limits the prevention or treatment of patients with various degrees and localizations of atherothrombotic disease. High-resolution magnetic resonance (MR) has recently emerged as one of the most promising techniques for the noninvasive study of atherothrombotic disease. Most importantly, MR can be used to characterize plaque composition and monitor progression. Thus, MR opens new strategies, ranging from the screening of high-risk patients for early detection and treatment as well as the monitoring of target areas for pharmacological intervention.
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Value or desirability of hemorheological-hemostatic parameter changes as endpoints in blood lipid-regulating trials. Curr Opin Lipidol 2001; 12:629-37. [PMID: 11801863 DOI: 10.1097/00041433-200112000-00006] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
High levels of plasma lipids have been recognized as a major risk factor in the development and progression of atherosclerosis, and to influence hemorheological factors that may predispose to thrombotic complications. Lipid-lowering interventions have been associated with a significant reduction of morbidity and mortality. Several mechanisms have been postulated for the observed clinical effect. Serum lipid-regulating therapies may reduce cardiovascular risk not only by altering the arterial wall, improving disturbed endothelial function, atherogenesis and plaque stability, but also through their antithrombogenic effects and influence on blood flow properties associated with hyperlipidemia. In this article, we will review the recent literature and discuss the value of hemorheological-hemostatic findings as surrogate endpoints for clinical trials in dyslipidemic patients.
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Abstract
The cardiovascular system is regulated by hemodynamic and neurohumoral mechanisms. These regulatory systems play a key role in modulating cardiac function, vascular tone, and structure. Although neurohumoral systems are essential in vascular homeostasis, they become maladaptive in disease states such as hypertension, coronary disease, and heart failure. The clinical success of ACE inhibitors has led to efforts to block other humoral systems. Neutral endopeptidase (NEP) is an endothelial cell surface zinc metallopeptidase with similar structure and catalytic site. NEP is the major enzymatic pathway for degradation of natriuretic peptides, a secondary enzymatic pathway for degradation of kinins, and adrenomedullin. The natriuretic peptides can be viewed as endogenous inhibitors of the renin angiotensin system. Inhibition of NEP increases levels of atrial natriuretic peptide (ANP), brain natriuretic peptide (BNP) of myocardial cell origin, and C-type natriuretic peptide (CNP) of endothelial cell origin as well as bradykinin and adrenomedullin. By simultaneously inhibiting the renin-angiotensin-aldosterone system and potentiating the natriuretic peptide and kinin systems, vasopeptidase inhibitors reduce vasoconstriction, enhance vasodilation, improve sodium/water balance, and, in turn, decrease peripheral vascular resistance and blood pressure and improve local blood flow. Within the blood vessel wall, this leads to a reduction of vasoconstrictor and proliferative mediators such as angiotensin II and increased local levels of bradykinin (and, in turn, nitric oxide) and natriuretic peptides. Preliminary clinical experiences with vasopeptidase inhibitors are encouraging. Thus, the combined inhibition of ACE and neutral endopeptidase is a new and promising approach to treat patients with hypertension, atherosclerosis, or heart failure.
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Effects of lipid-lowering by simvastatin on human atherosclerotic lesions: a longitudinal study by high-resolution, noninvasive magnetic resonance imaging. Circulation 2001; 104:249-52. [PMID: 11457739 DOI: 10.1161/01.cir.104.3.249] [Citation(s) in RCA: 356] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND This study was designed to investigate the effects of lipid-lowering by simvastatin on human atherosclerotic lesions. METHODS AND RESULTS Eighteen asymptomatic hypercholesterolemic patients with documented aortic and/or carotid atherosclerotic plaques were selected for the study. A total of 35 aortic and 25 carotid artery plaques were detected. Serial black-blood MRI of the aorta and carotid artery of the patients was performed at baseline and 6 and 12 months after lipid-lowering therapy with simvastatin. The effects of the treatment on atherosclerotic lesions were measured as changes in lumen area, vessel wall thickness, and vessel wall area, a surrogate of atherosclerotic burden. Simvastatin induced a significant (P<0.01) reduction in total and LDL cholesterol levels at 6 weeks that was maintained thereafter. At 6 months, no changes in lumen area, vessel wall thickness, or vessel wall area were observed. However, at 12 months, significant reductions in vessel wall thickness and vessel wall area, without changes in lumen area, were observed in both aortic and carotid arteries (P<0.001). CONCLUSIONS This in vivo human study demonstrates that effective and maintained lipid-lowering therapy by simvastatin is associated with a significant regression of atherosclerotic lesions. Our observation suggests that statins induce vascular remodeling, as manifested by reduced atherosclerotic burden without changes in the lumen.
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Predictors of long-term survival after valve replacement for chronic aortic regurgitation. Is M-mode echocardiography sufficient? Eur Heart J 2001; 22:866-73. [PMID: 11350096 DOI: 10.1053/euhj.2000.2314] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
AIMS The clinical importance of pre-operative and follow-up echocardiographic studies in patients operated on for chronic severe aortic valve regurgitation is still a matter of debate. The prognostic significance of M-mode echocardiography has never been directly compared with clinical and angiographic data. METHODS AND RESULTS Univariate and multivariate analyses of cumulative survival were performed for clinical, echocardiographic and angiographic data of 125 patients operated on between 1975 and 1983, and followed for 13.3+/-6.4 years. Ten and 20 year survival rates were 77% and 48%, respectively. Age, NYHA class, angiographic volumes, ejection fraction, as well as M-mode echocardiographic end-systolic dimension and shortening fraction were the main pre-operative prognostic parameters for long-term survival. In a multivariate analysis the angiographic end-systolic volume index, age and preoperative NYHA class were independent pre-operative prognostic variables of long-term survival. A postoperative reduction in end-diastolic dimension of >20% predicted a significantly better late survival (74% vs 44% after 20 years, P<0.001). CONCLUSIONS Age, pre-operative NYHA class and left ventricular systolic function are the main determinants of long-term survival after valve replacement for chronic aortic regurgitation. Despite a slightly lower predictive value of echocardiography when compared to angiography, it appeared sufficient for everyday clinical decision making for valve replacement. Echocardiography within 6 months postoperatively is able to detect recovery of left ventricular function, and enables additional risk-stratification, regardless of pre-operative findings.
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Autonomic nervous system-controlled cardiac pacing: a comparison between intracardiac impedance signal and muscle sympathetic nerve activity. Pacing Clin Electrophysiol 2000; 23:1632-7. [PMID: 11138300 DOI: 10.1046/j.1460-9592.2000.01632.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
A recently introduced rate responsive cardiac pacing system is based on information derived from the intracardiac impedance signal containing information on the inotropic state of the ventricle. This study compared the inotropic state index (ISI) with muscle sympathetic activity (MSA), both being modulated by the autonomic nervous system. Nine patients (66 +/- 3 years, mean +/- SEM) with Inos2DR pacemakers were included. Each patient was studied at rest and during cold pressor test (CPT). Microneurography of the peroneal nerve was performed to measure MSA continuously, which was digitally stored along with continuous surface ECG and blood pressure. The intracardiac impedance signal was transmitted by the pacemaker and stored simultaneously. Linear correlation between ISI and MSA was calculated for the period of the CPT. During CPT, mean systolic blood pressure increased from 122 +/- 4 to 149 +/- 6 mmHg (P < 0.0001), diastolic blood pressure increased from 74 +/- 8 to 86 +/- 4 mmHg (P = 0.02), and intrinsic heart rate increased from 69 +/- 7 to 75 +/- 7 beats/mill (P = 0.019). ISI increased by 21 +/- 7% (P = 0.018), MSA by 26 +/- 6% (P = 0.004). ISI and MSA were positively correlated during the CPT in eight of nine patients (R2 = 0.86-0.99, P < 0.0001). Negative correlation was found in one patient (R2 = 0.94). This study demonstrates parallel increases of the ISI and MSA during CPT. ISI and MSA showed a close linear relationship during provoked changes of sympathetic activity. These results provide further evidence that the sympathetic nervous system is responsible for the observed ISI changes.
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Abstract
OBJECTIVES We sought to investigate baroreceptor regulation of sympathetic nerve activity and hemodynamics after inhibition of nitric oxide (NO) synthesis. BACKGROUND Both the sympathetic nervous system and endothelium-derived substances play essential roles in cardiovascular homeostasis and diseases. Little is known about their interactions. METHODS In healthy volunteers, we recorded muscle sympathetic nerve activity (MSA) with microneurography and central hemodynamics measured at different levels of central venous pressure induced by lower body negative pressure. RESULTS After administration of the NO synthase inhibitor NG-monomethyl-L-arginine (L-NMMA, 1 mg/kg/min), systolic blood pressure increased by 24 mm Hg (p = 0.01) and diastolic blood pressure by 12 mm Hg (p = 0.009), while stroke volume index (measured by thermodilution) fell from 53 to 38 mL/min/m2 (p < 0.002). Administration of L-NMMA prevented the compensatory increase of heart rate, but not MSA, to orthostatic stress. The altered response of heart rate was not due to higher blood pressure, because heart rate responses were not altered during infusion of the alpha-1-adrenoceptor agonist phenylephrine (titrated to an equal increase of systolic blood pressure). In the presence of equal systolic blood pressure and central venous pressure, we found no difference in MSA during phenylephrine and L-NMMA infusion. CONCLUSIONS This study demonstrates a highly specific alteration of baroreceptor regulation of heart rate but not muscle sympathetic activity after inhibition of NO synthesis in healthy volunteers. This suggests an important role of NO in reflex-mediated heart rate regulation in humans.
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[Detection of Helicobacter pylori by polymerase reaction in bile samples from gallbladder and bile stones]. ACTA GASTROENTEROLOGICA LATINOAMERICANA 2000; 29:251-3. [PMID: 10599400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/14/2023]
Abstract
Some papers report helicobacter pylori existence in bile from surgical specimens obtained during gallbladder or bile ducts surgery. The aim of this work was search by PCR, H. Pylori presence in bile specimens from patients suffering of gallbladder stones or by bile ducts stones. Bile samples were obtained by gallbladder punction during cholecystectomy in 26 patients, 19 of them with gallbladder stones and 7 also with gallbladder stones and bile duct stones. Age ranged from 22-69 years old, median 49.6 years old. Samples were sent to specialized biomolecular laboratory to perform PCR techniques. Two of 26 patients (7.6%) had positive reaction for the presence of DNA of H. Pylori in bile samples. Our research suggest that DNA of H. Pylori can be founded in bile samples patients with gallbladders and duct stones in Argentina.
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[Absence of bleeding recurrence of peptic ulcer after long term follow-up of successful eradication of Helicobacter pylori]. ACTA GASTROENTEROLOGICA LATINOAMERICANA 1999; 29:47-50. [PMID: 10491714] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/14/2023]
Abstract
Helicobacter pylori (HP) eradication reduces dramatically the peptic ulcer relapse rate, but information regarding recurrence of peptic ulcer bleeding after eradication is still scanty. Available data show rebleeding rates of 0-3% per year in successfully eradication patients, compared with figures between 12 and 33% among the non eradicated ones. The aim of this study was to determine the rebleeding rate among successfully eradicated patients with a prior history of rebleeding peptic ulcer. 42 patients (34 male, mean age 49, range 18-74) hospitalised for Hp positive bleeding peptic ulcer undergoing conservative treatment, were given as soon as oral route was re-established, a one-week eradication treatment, followed by the same proton pump inhibitor for three or five weeks for duodenal and gastric ulcer healing respectively. No maintenance antiulcer therapy was indicated. Patients were advised not to take nonsteroideal anti-inflammatory drug. Ulcer healing and Hp eradication was confirmed in all 42 patients by means of endoscopy and biopsies for urease rapid test and histology four weeks after completion of the treatment. After this patients were invited to enter a long-term follow-up program with periodical visits. End point of the study was occurrence of rebleeding. Further endoscopies were planned when rebleeding or symptomatic relapse. Median follow-up time was 24.02 months, ranging from 3 up to 27 months. All patients were compliant with the follow-up visits. None of the patients presented with symptoms suggestive of ulcer relapse or upper gastrointestinal bleeding. Our data suggest, that Hp eradication can prevent bleeding relapses in patients with Hp positive bleeding peptic ulcers.
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To open or not to open, that is the question. Wien Klin Wochenschr 1999; 111:615-7. [PMID: 10510838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/14/2023]
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