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Schiffmann L, Becker M, Develing L, Varga-Szabo D, Scheidereiter-Krüger C, Zirngibl H, Seifert M, Biermann L, Schlüter C, Tumczak F, Weimann A, Jansen-Winkeln B, Wallstabe I, Schwandner F, Denecke S, Schafmayer C, Kamaleddine I, Stier A, Haegele K, Kindler M, Michling S, Horling EW, Denzer U. SEVTAR-A multicenter randomized controlled trial to investigate the impact of prophylactic endoluminal placed vacuum sponge for prevention of anastomotic leakage after low rectal resections. Front Surg 2023; 9:1099549. [PMID: 36860727 PMCID: PMC9968789 DOI: 10.3389/fsurg.2022.1099549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Accepted: 12/30/2022] [Indexed: 02/15/2023] Open
Abstract
Background Low anterior resection for rectal cancer is commonly associated with a diverting stoma. In general, the stoma is closed 3 months after the initial operation. The diverting stoma reduces the rate of anastomotic leakage as well as the severeness of a potential leakage itself. Nevertheless, anastomotic leakage is still a life-threatening complication and might reduce the quality of life in the short and long term. In case of leakage, the construction can be converted into a Hartmann situation or it could be treated by endoscopic vacuum therapy or by leaving the drains. In recent years, endoscopic vacuum therapy has become the treatment of choice in many institutions. In this study, the hypothesis is to be evaluated, if a prophylactic endoscopic vacuum therapy reduces the rate of anastomotic leakage after rectal resections. Methods A multicenter parallel group randomized controlled trial is planned in as many as possible centers in Europe. The study aims to recruit 362 analyzable patients with a resection of the rectum combined with a diverting ileostoma. The anastomosis has to be between 2 and 8 cm off the anal verge. Half of these patients receive a sponge for 5 days, and the control group is treated as usual in the participating hospitals. There will be a check for anastomotic leakage after 30 days. Primary end point is the rate of anastomotic leakages. The study will have 60% power to detect a difference of 10%, at a one-sided alpha significance level of 5%, assuming an anastomosis leakage rate of 10%-15%. Discussion If the hypothesis proves to be true, anastomosis leakage could be reduced significantly by placing a vacuum sponge over the anastomosis for 5 days. Trial registration The trial is registered at DRKS: DRKS00023436. It has been accredited by Onkocert of the German Society of Cancer: ST-D483. The leading Ethics Committee is the Ethics Committee of Rostock University with the registration ID A 2019-0203.
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Affiliation(s)
- Leif Schiffmann
- Department of Visceral and General Surgery, Helios Klinikum Aue, Aue, Germany,Department of General, Thoracic, Vascular and Transplantation Surgery, University of Rostock, Rostock, Germany,Correspondence: Leif Schiffmann
| | - Matthias Becker
- Department of Visceral and General Surgery, Helios Weißeritztal-Kliniken GmbH—Klinikum Freital, Freital, Germany
| | - Leendert Develing
- Department of Visceral and General Surgery, University Hospital Wuppertal, Wuppertal, Germany
| | - David Varga-Szabo
- Department of Visceral and General Surgery, University Hospital Wuppertal, Wuppertal, Germany
| | | | - Hubert Zirngibl
- Department of Visceral and General Surgery, University Hospital Wuppertal, Wuppertal, Germany
| | - Michael Seifert
- Department of Visceral and General Surgery, Helios Klinikum Erfurt, Erfurt, Germany
| | - Lothar Biermann
- Department of Visceral and General Surgery, Joseph Hospital Warendorf, Warendorf, Germany
| | - Claudia Schlüter
- Department of Visceral and General Surgery, Joseph Hospital Warendorf, Warendorf, Germany
| | - Felicitas Tumczak
- Department of Visceral and General Surgery, University Hospital Wuppertal, Wuppertal, Germany
| | - Arved Weimann
- Department of Visceral and General Surgery, Klinikum St. Georg Leipzig, Leipzig, Germany
| | - Boris Jansen-Winkeln
- Department of Visceral and General Surgery, Klinikum St. Georg Leipzig, Leipzig, Germany
| | - Ingo Wallstabe
- Department of Gastroenterology, Klinikum St. Georg Leipzig, Leipzig, Germany
| | - Frank Schwandner
- Department of General, Thoracic, Vascular and Transplantation Surgery, University of Rostock, Rostock, Germany
| | - Sandra Denecke
- Department of Visceral and General Surgery, University Hospital Wuppertal, Wuppertal, Germany
| | - Clemens Schafmayer
- Department of General, Thoracic, Vascular and Transplantation Surgery, University of Rostock, Rostock, Germany
| | - Imad Kamaleddine
- Department of General, Thoracic, Vascular and Transplantation Surgery, University of Rostock, Rostock, Germany
| | - Albrecht Stier
- Department of Visceral and General Surgery, Helios Klinikum Erfurt, Erfurt, Germany
| | - Katharina Haegele
- Department of Visceral and General Surgery, Klinikum St. Georg Leipzig, Leipzig, Germany
| | - Michael Kindler
- Department of Visceral and General Surgery, Helios Weißeritztal-Kliniken GmbH—Klinikum Freital, Freital, Germany
| | - Sabine Michling
- Department of Visceral and General Surgery, Klinikum Kaufbeuren, Kaufbeuren, Germany
| | - Ernst-Wilhelm Horling
- Department of Visceral and General Surgery, Klinikum Kaufbeuren, Kaufbeuren, Germany
| | - Ulrike Denzer
- Department of Gastroenterology, Marburg University Hospital, Marburg, Germany
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Hesslinger B, Tebartz van Elst L, Thiel T, Haegele K, Hennig J, Ebert D. Frontoorbital volume reductions in adult patients with attention deficit hyperactivity disorder. Neurosci Lett 2002; 328:319-21. [PMID: 12147334 DOI: 10.1016/s0304-3940(02)00554-2] [Citation(s) in RCA: 152] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Attention deficit hyperactivity disorder (ADHD) is a common psychiatric disorder in childhood and adolescence and in a considerable number of patients it persists into adulthood. A network of brain regions have been shown to be abnormal in ADHD. In the present study we used magnetic resonance volumetry to investigate a possible role of the orbitofrontal cortex (OFC). Eight never medicated male patients fulfilling diagnostic criteria for ADHD and 17 male healthy controls were investigated. There was a significant reduction of the volume of the left OFC in patients with ADHD. It remains unknown whether small volumes are a primary deficit or a result of dysfunctional activation during childhood in terms of a residual deficit or a specific type of adult outcome of the disease.
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Affiliation(s)
- B Hesslinger
- Department of Psychiatry and Psychotherapy, Albert-Ludwigs-University, Hauptstrasse 5, 79104, Freiburg, Germany.
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Engelborghs S, Pickut BA, D'Hooge R, Wiechert P, Haegele K, De Deyn PP. Behavioral effects of vigabatrin correlated with whole brain gamma-aminobutyric acid metabolism in audiogenic sensitive rats. Arzneimittelforschung 1998; 48:713-6. [PMID: 9706369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The present study evaluates dose-dependent behavioral effects of acutely or subacutely administered single doses of vigabatrin (gamma-vinyl gamma-aminobutyric acid, gamma-vinyl GABA, CAS 60643-86-9) in audiogenic sensitive rats, in correlation with whole brain GABA metabolism. There was a discrepancy in timing between behaviorally observed maximal antiepileptic protection (4 h after i.p. administration of gamma-vinyl GABA) and on the other hand maximal inhibition of GABA-transaminase activity and maximal increase of whole brain GABA content (24 h after i.p. administration of gamma-vinyl GABA). This suggests that the antiepileptic properties of gamma-vinyl GABA not only depend on GABA-ergic neurotransmission. A possible explanation is a gamma-vinyl GABA-induced decrease of excitatory amino acids or increased glycine concentrations in the brain.
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Affiliation(s)
- S Engelborghs
- Department of Neurology and Memory Clinic, Algemeen Ziekenhuis Middelheim, University of Antwerp, Belgium
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Kunz L, Zeidler U, Haegele K, Przybylski M, Stark G. Photodynamic and radiolytic inactivation of ion channels formed by gramicidin A: oxidation and fragmentation. Biochemistry 1995; 34:11895-903. [PMID: 7547925 DOI: 10.1021/bi00037a030] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Ion channels formed by the peptide gramicidin A in planar lipid membranes have been reported to react very sensitively upon irradiation of the membrane by ionizing radiation (radiolysis), by UV light (photolysis), or by visible light in the presence of appropriate photosensitizers (photodynamic inactivation). In all three cases the effect is due to the presence of the four tryptophan residues of the pentadecapeptide. Modifications of these amino acids--due to an interaction with free radicals formed upon water radiolysis or due to light absorption--have been found to reduce the membrane conductance by many orders of magnitude. The present study was intended to correlate functional changes, observed at the level of single ion channels, with changes of the molecular structure identified by mass spectrometry. About 98% of the inactivated channels showed a single-channel conductance of virtually zero, while about 2% of the channels present before irradiation are converted to a state of reduced conductance (and reduced lifetime). On the structural level, irradiation in the presence of the photosensitizer Rose Bengal was found to produce oxidation and fragmentation of the peptide at the positions of the tryptophan residues. Our results provide evidence that the main effect of radiolysis, or of photodynamic treatment, is the cleavage of the peptide backbone leading to immediate closure of an open ion channel.
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Affiliation(s)
- L Kunz
- Department of Biology, University of Konstanz, Germany
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Baur X, Dewair M, Haegele K, Prelicz H, Scholl A, Tichy H. Common antigenic determinants of haemoglobin as basis of immunological cross-reactivity between chironomid species (Diptera, Chironomidae): studies with human and animal sera. Clin Exp Immunol 1983; 54:599-607. [PMID: 6197219 PMCID: PMC1535874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
Chironomids, of which approximately 10,000 species exist, are reported to cause severe immediate type allergic diseases in man. In the present study, immunological cross-reactivity between 14 chironomid species from different continents was proven by RAST inhibition, double immunodiffusion and a new allergoprint technique, based upon PAGE separation of insect crude extracts. Using isolated chironomid haemoglobins and sera of sensitized persons, as well as rabbit antibodies against larval crude extract or against the haemoglobin fraction of Chironomus thummi, it could be proven that cross-reactivity derives at least predominantly from haemoglobin components with common antigenic determinants in the different species.
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Weissenburger J, Heckle J, Juliard JM, Biour M, Haegele K, Cheymol G. [Hemodynamic effects of medroxalol in the anesthetized dog. Relation between adrenolytic properties and plasma concentration]. J Pharmacol 1983; 14:413-423. [PMID: 6142982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Hemodynamic properties of medroxalol (MDL), a new alpha-and-beta adrenoceptor antagonistic drug, were studied in eight pentobarbital-anesthetized (open chest) dogs. MDL was injected in three doses (1.5, 3.0 and 9.0 mg/kg i.v.) at one hour intervals. A control group (n = 5) received three successive vehicle injections at the same time intervals. Heart rate, systolic and diastolic arterial pressure, cardiac output and stroke volume (using an intrathoracic flowmeter), and peripheral resistance were recorded 45 min before the first injection and 15 min after each administration. Isoproterenol (ISP) and neosynephrine (NSP) dose-response curves were recorded before the first dose and after each injection in both group. Log-linear regression analyses were used to estimate the ISP chronotropic dose 25 (DC 25) and the ISP barotropic dose 30 (DB 30). The results show that medroxalol possesses beta-adrenoreceptor antagonistic properties which are 35 times greater than its alpha-antagonistic properties. Beta-blockade was evidenced by bradycardia and increase in DC 25, beginning at the first dose used. Alpha-blockade was not significant at that first dose and therefore cannot alone explain the strong hypotension observed. All these effects were related to the plasma-concentration of MDL.
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Abstract
A high-pressure-liquid-chromatographic method suitable for the separation and sensitive detection of putreanine and isoputreanine is described. This method allowed us to study the formation of the metabolites of the oxidative deamination of spermidine and N1-acetylspermidine. Administration of spermidine trishydrochloride to mice causes a time-dependent accumulation of putreanine and N-(3-aminopropyl)pyrrolidin-2-one in various organs. The latter compound yields isoputreanine by hydrolysis. It can be assumed that the analogous lactam. N-(3-acetamidopropyl)pyrrolidin-2-one is formed from N1-acetylspermidine, since hydrolysis of tissue extracts of N1-acetylspermidine-treated mice produced isoputreanine. No putreanine is formed under these conditions. Pretreatment of the animals with 25 mg of aminoguanidine sulphate/kg body wt. completely inhibits the formation of putreanine and of the respective isoputreanine precursor from spermidine and N1-acetylspermidine. This suggests a role for a diamine oxidase-like enzyme in the oxidative deamination of spermidine and N1-acetylspermidine.
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