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Reis H, Szarvas T. [Urachal cancer - current concepts of a rare cancer (German version)]. DER PATHOLOGE 2018; 39:291-300. [PMID: 30470871 DOI: 10.1007/s00292-018-0498-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Urachal cancer is a rare but aggressive disease. In addition to the non-glandular tumors, non-cystic urachal adenocarcinomas are nowadays distinguished from the primary cystic variant. (Immunohistochemical) markers are only of minor differential diagnostic value and, therefore, the diagnosis is primarily established in a multidisciplinary approach. The non-cystic variant accounts for the majority of cases (83%), is more common in men (63%), shows a median age at diagnosis of 51 years and has a 5-year survival rate of about 50%. In organ-confined disease, usually a partial cystectomy of the tumor in the bladder dome, including the median umbilical ligament and umbilicus, is performed. In advanced stages, systemic therapy is needed while 5‑fuorouracil (5-FU) containing regimes have been shown to be more effective. Due to the rarity of the tumor, targeted therapy approaches based on a biological rationale are becoming increasingly relevant. As molecular data are still sparse, we compiled and analyzed the largest urachal cancer cohort to date. In 31% of the cases, MAPK-/PI3K signaling pathway alterations were detected (especially in K-/NRAS) with implications for anti-EGFR therapy approaches. Further potentially therapeutic alterations were detected in FGFR1, MET, PDGFRA, and erbB2/HER2. Additionally, PD-L1 tumor cell expression (clone: 22C3) was demonstrated in 16% of cases, therefore making anti-PD-1/PD-L1 immuno-oncological approaches worth considering despite the absence of mismatch repair deficiency (MMR-d) and/or high microsatellite instability (MSI-h). Finally, urachal adenocarcinomas seem to be a distinct entity on the molecular level with closer resemblance to colorectal adenocarcinomas than to urothelial carcinomas.
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Juntermanns B, Fingas CD, Sotiropoulos GC, Jaradat D, Dechêne A, Reis H, Kasper S, Paul A, Kaiser GM. [Klatskin tumor: long-term survival following surgery]. Chirurg 2018; 87:514-9. [PMID: 27090415 DOI: 10.1007/s00104-016-0169-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
BACKGROUND Perihilar cholangiocarcinoma (Klatskin tumor) is a rare tumor entity with an unfavorable prognosis despite optimal treatment. OBJECTIVES The aim of the study is to investigate beneficial histopathological features and recommendations for surgery in perihilar cholangiocarcinoma to improve patients' long term survival. MATERIAL AND METHODS 192 patients suffering from perihilar cholangiocarcinoma underwent attempted tumor resection between 1998 and 2008 at our clinic. 50 patients survived more than 2 years. The follow-up ended in December 2013. The resection type, the UICC stage and histopathological features were compared between three groups (2-3-year, 3-5-year and > 5-year survival groups). RESULTS The overall 5‑year survival rate of the study groups was 32 %, and even 16 % survived more than 10 years after surgery. Patients with lymph node positive tumors (p = 0.0126) and distant metastasis (p = 0.0376) had the poorest survival rate. Perineural invasion had no significant impact on the overall survival, but patients surviving more than 5 years had the lowest incidence of perineural invasion with 18.75 %. Caudate lobectomy was significantly (p = 0.011) associated with a survival of more than 5 years in our study. CONCLUSIONS Complete tumor resection with additional caudate lobe resection is associated with long-term survival. Perineural invasion seems to be a negative prognostic factor for long-term survival.
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Zaleśny R, Medved’ M, Góra RW, Reis H, Luis JM. Partitioning of interaction-induced nonlinear optical properties of molecular complexes. I. Hydrogen-bonded systems. Phys Chem Chem Phys 2018; 20:19841-19849. [DOI: 10.1039/c8cp02967a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Interaction-induced electronic and vibrational (hyper)polarizabilities were decomposed into different interaction types (electrostatic, exchange, induction and dispersion).
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Baggen-Santos R, Trêpa M, Silveira I, Brochado B, Sousa M, Roque C, Vieira A, Lagarto V, Dias V, Reis H, Torres S. 073_16789 Predictors Of Global Response To Cardiac Resynchronization Therapy: Beyond The Classic. JACC Clin Electrophysiol 2017. [DOI: 10.1016/j.jacep.2017.09.083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Baggen Santos R, Baggen Santos R, Trepa M, Silveira I, Sousa M, Brochado B, Roque C, Pinheiro Vieira A, Lagarto V, Reis H, Albuquerque A, Torres S. 073_16781-K3 NYHA Functional Class or Left Ventricle Ejection Fraction: Who Should we Rely on to Predict Mortality in Cardiac Resynchronization Therapy? JACC Clin Electrophysiol 2017. [DOI: 10.1016/j.jacep.2017.09.091] [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]
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Baggen Santos R, Trepa M, Silveira I, Sousa M, Brochado B, Roque C, PinheiroVieira A, Lagarto V, Reis H, Albuquerque A, Torres S. 073_16779-K3 Resynchronization Therapy: Response and Clinical Outcomes in Patients With Ischemic and Non-Ischemic Cardiomyopathy. JACC Clin Electrophysiol 2017. [DOI: 10.1016/j.jacep.2017.09.164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Franklin C, Rooms I, Fiedler M, Reis H, Milsch L, Herz S, Livingstone E, Zimmer L, Schmid K, Dittmer U, Schadendorf D, Schilling B. Cytomegalovirus reactivation in patients with refractory checkpoint inhibitor-induced colitis. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx376.055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Rodrigues P, Pereira D, Coelho T, Reis H. P5401Tafamidis and cardiovascular involvement in hereditary ATTR amyloidosis: a 10-year story. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx493.p5401] [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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Trepa M, Silveira I, Baggen Santos R, Fontes Oliveira M, Brochado B, Alves Dias V, Pinheiro Vieira A, Roque C, Lagarto V, Reis H, Torres S. P1570Upgrading pacemaker vs direct implantation of CRT in heart failure patients: is there a difference in clinical outcomes? Europace 2017. [DOI: 10.1093/ehjci/eux158.196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Kälsch J, Padden J, Bertram S, Pott LL, Reis H, Westerwick D, Schaefer CM, Sowa JP, Möllmann D, Fingas C, Dechene A, Sitek B, Eisenacher M, Canbay A, Ahrens M, Baba HA. Annexin A10 meets the challenge of differentiating intrahepatic cholangiocarcinoma from metastatic pancreatic ductal adenocarcinoma. A comparative study of immunohistochemical markers. ZEITSCHRIFT FUR GASTROENTEROLOGIE 2016. [DOI: 10.1055/s-0036-1597453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Loboda O, Ingrosso F, Ruiz-López MF, Reis H, Millot C. Dipole and quadrupole polarizabilities of the water molecule as a function of geometry. J Comput Chem 2016; 37:2125-32. [DOI: 10.1002/jcc.24431] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2016] [Revised: 05/24/2016] [Accepted: 05/27/2016] [Indexed: 11/11/2022]
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Lauvergnat D, Luis JM, Kirtman B, Reis H, Nauts A. Numerical and exact kinetic energy operator using Eckart conditions with one or several reference geometries: Application to HONO. J Chem Phys 2016; 144:084116. [DOI: 10.1063/1.4942172] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Leonis G, Avramopoulos A, Papavasileiou KD, Reis H, Steinbrecher T, Papadopoulos MG. A Comprehensive Computational Study of the Interaction between Human Serum Albumin and Fullerenes. J Phys Chem B 2015; 119:14971-85. [PMID: 26523956 DOI: 10.1021/acs.jpcb.5b05998] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Human serum albumin (HSA) is the most abundant blood plasma protein, which transports fatty acids, hormones, and drugs. We consider nanoparticle-HSA interactions by investigating the binding of HSA with three fullerene analogs. Long MD simulations, quantum mechanical (fragment molecular orbital, energy decomposition analysis, atoms-in-molecules), and free energy methods elucidated the binding mechanism in these complexes. Such a systematic study is valuable due to the lack of comprehensive theoretical approaches to date. The main elements of the mechanism include the following: binding to IIA site results in allosteric modulation of the IIIA and heme binding sites with an increase in α-helical structure of IIIA. Fullerenes displayed high binding affinities for HSA; therefore, HSA can be used as a fullerene carrier, facilitating any toxic function the fullerene may exert. Complex formation is driven by hydrogen bonding, van der Waals, nonpolar, charge transfer, and dispersion energy contributions. Proper functionalization of C60 has enhanced its binding to HSA by more than an order of magnitude. This feature may be important for biological applications (e.g., photodynamic therapy of cancer). Satisfactory agreement with relevant experimental and theoretical data has been obtained.
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Modos O, Szarvas T, Reis H, Niedworok C, Rübben H, Szendröi A, Szasz AM, Hollosi P, Baghy K, Kovalszky I, Okon K, Golabek T, Chlosta P, Shariat SF, Peyronnet B, Mathieu R, Nyirády P. Mutation analysis of EGFR signal transduction pathway in urachal carcinoma. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/s1569-9056(15)30251-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Tzoupis H, Leonis G, Avramopoulos A, Reis H, Czyżnikowska Ż, Zerva S, Vergadou N, Peristeras LD, Papavasileiou KD, Alexis MN, Mavromoustakos T, Papadopoulos MG. Elucidation of the binding mechanism of renin using a wide array of computational techniques and biological assays. J Mol Graph Model 2015; 62:138-149. [PMID: 26421414 DOI: 10.1016/j.jmgm.2015.09.015] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2015] [Revised: 09/14/2015] [Accepted: 09/16/2015] [Indexed: 12/01/2022]
Abstract
We investigate the binding mechanism in renin complexes, involving three drugs (remikiren, zankiren and enalkiren) and one lead compound, which was selected after screening the ZINC database. For this purpose, we used ab initio methods (the effective fragment potential, the variational perturbation theory, the energy decomposition analysis, the atoms-in-molecules), docking, molecular dynamics, and the MM-PBSA method. A biological assay for the lead compound has been performed to validate the theoretical findings. Importantly, binding free energy calculations for the three drug complexes are within 3 kcal/mol of the experimental values, thus further justifying our computational protocol, which has been validated through previous studies on 11 drug-protein systems. The main elements of the discovered mechanism are: (i) minor changes are induced to renin upon drug binding, (ii) the three drugs form an extensive network of hydrogen bonds with renin, whilst the lead compound presented diminished interactions, (iii) ligand binding in all complexes is driven by favorable van der Waals interactions and the nonpolar contribution to solvation, while the lead compound is associated with diminished van der Waals interactions compared to the drug-bound forms of renin, and (iv) the environment (H2O/Na(+)) has a small effect on the renin-remikiren interaction.
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Klein D, Schmitz T, Verhelst V, Panic A, Schenck M, Reis H, Drab M, Sak A, Herskind C, Maier P, Jendrossek V. Endothelial Caveolin-1 regulates the radiation response of epithelial prostate tumors. Oncogenesis 2015; 4:e148. [PMID: 25985209 PMCID: PMC4450264 DOI: 10.1038/oncsis.2015.9] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2014] [Revised: 02/24/2015] [Accepted: 03/20/2015] [Indexed: 02/08/2023] Open
Abstract
The membrane protein caveolin-1 (Cav1) recently emerged as a novel oncogene involved in prostate cancer progression with opposed regulation in epithelial tumor cells and the tumor stroma. Here we examined the role of stromal Cav1 for growth and radiation response of MPR31-4 prostate cancer xenograft tumors using Cav1-deficient C57Bl/6 mice. Syngeneic MPR31-4 tumors grew faster when implanted into Cav1-deficient mice. Increased tumor growth on Cav1-deficient mice was linked to decreased integration of smooth muscle cells into the wall of newly formed blood vessels and thus with a less stabilized vessel phenotype compared with tumors from Cav1 wild-type animals. However, tumor growth delay of MPR31-4 tumors grown on Cav1 knockout mice to a single high-dose irradiation with 20 Gray was more pronounced compared with tumors grown on wild-type mice. Increased radiation-induced tumor growth delay in Cav1-deficient mice was associated with an increased endothelial cell apoptosis. In vitro studies using cultured endothelial cells (ECs) confirmed that the loss of Cav1 expression increases sensitivity of ECs to radiation-induced apoptosis and reduces their clonogenic survival after irradiation. Immunohistochemical analysis of human tissue specimen further revealed that although Cav1 expression is mostly reduced in the tumor stroma of advanced and metastatic prostate cancer, the vascular compartment still expresses high levels of Cav1. In conclusion, the radiation response of MPR31-4 prostate tumors is critically regulated by Cav1 expression in the tumor vasculature. Thus, Cav1 might be a promising therapeutic target for combinatorial therapies to counteract radiation resistance of prostate cancer at the level of the tumor vasculature.
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Reis H, Rasulev B, Papadopoulos MG, Leszczynski J. Reliable but Timesaving: In Search of an Efficient Quantum-chemical Method for the Description of Functional Fullerenes. Curr Top Med Chem 2015; 15:1845-58. [PMID: 25961522 DOI: 10.2174/1568026615666150506150601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2014] [Revised: 03/19/2015] [Accepted: 03/24/2015] [Indexed: 11/22/2022]
Abstract
Fullerene and its derivatives are currently one of the most intensively investigated species in the area of nanomedicine and nanochemistry. Various unique properties of fullerenes are responsible for their wide range applications in industry, biology and medicine. A large pool of functionalized C60 and C70 fullerenes is investigated theoretically at different levels of quantum-mechanical theory. The semiempirial PM6 method, density functional theory with the B3LYP functional, and correlated ab initio MP2 method are employed to compute the optimized structures, and an array of properties for the considered species. In addition to the calculations for isolated molecules, the results of solution calculations are also reported at the DFT level, using the polarizable continuum model (PCM). Ionization potentials (IPs) and electron affinities (EAs) are computed by means of Koopmans' theorem as well as with the more accurate but computationally expensive ΔSCF method. Both procedures yield comparable values, while comparison of IPs and EAs computed with different quantum-mechanical methods shows surprisingly large differences. Harmonic vibrational frequencies are computed at the PM6 and B3LYP levels of theory and compared with each other. A possible application of the frequencies as 3D descriptors in the EVA (EigenVAlues) method is shown. All the computed data are made available, and may be used to replace experimental data in routine applications where large amounts of data are required, e.g. in structure-activity relationship studies of the toxicity of fullerene derivatives.
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Reis H, Herold T, Ting S, Worm K, Huber U, Christoph DC, Eberhardt WE, Kostbade K, Kasper S, Stamatis G, Welter S, Darwiche K, Karpf-Wissel R, Theegarten D, Schmid KW, Schuler M, Wiesweg M. HER2 expression and markers of phosphoinositide-3-kinase pathway activation define a favorable subgroup of metastatic pulmonary adenocarcinomas. Lung Cancer 2015; 88:34-41. [PMID: 25708529 DOI: 10.1016/j.lungcan.2015.02.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2014] [Revised: 01/04/2015] [Accepted: 02/01/2015] [Indexed: 11/25/2022]
Abstract
OBJECTIVES Pulmonary adenocarcinomas (ADC) can be sub-grouped based on dominant oncogenic drivers. EGFR mutations define an entity of metastatic ADC with favorable prognosis and high susceptibility to EGFR tyrosine kinase inhibition. In contrast, the clinical impact of additional ERBB family members in ADC is less defined. To this end we prospectively studied HER2 expression, gene amplification, and mutation in relation to outcome of patients with advanced or metastatic ADC. MATERIALS AND METHODS Diagnostic tumor biopsies from 193 sequential patients with stage III/IV ADC were prospectively studied for HER2 expression by immunohistochemistry (IHC). Cases with IHC scores 2+ or 3+ were analyzed by HER2 chromogenic in situ hybridization (CISH), and sequencing of HER2 exons 20 and 23. Additional prospectively determined biomarkers included PTEN, cMET, pAKT, and pERK expression, KRAS, EGFR, BRAF and PIK3CA mutations, and ALK fluorescence ISH (FISH). RESULTS AND CONCLUSION HER2-IHC was feasible in 176 (91.2%) cases. Of 53 (30%) cases with IHC scores 2+/3+, 45 (85%) could be studied by CISH and 34 (64%) by sequencing. The lower number of HER2-mutational analyses resulted from exhaustion of tumor tissue and DNA following mutational analysis of KRAS, EGFR, BRAF and PIK3CA. HER2 amplification was detected in 4 cases (2.3%), while no mutation was found. HER2 expression correlated with expression of pAKT and cMET. Expression of HER2 and pAKT was associated with favorable overall survival in stage IV disease. HER2-expressing ADC more frequently harbored KRAS mutations, while HER2 expression was absent in all 4 cases with BRAF mutation. HER2-IHC was not predictive of HER2 gene amplification or mutation, which both were rare events in prospectively studied patients with advanced or metastatic ADC. Expression of HER2 and pAKT define a population of patients with stage IV ADC with a distinct disease course, who could benefit from specifically tailored pharmacotherapies.
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Nogova L, Mattonet C, Scheffler M, Michels S, Bos M, Heukamp L, Schildhaus H, Fuhr U, Eberhardt W, Reis H, Wiesweg M, Schmid K, Schoch G, Serke M, Ko Y, Schuler M, Büttner R, Wolf J. Try - a Phase Ii Study to Evaluate Safety and Efficacy of Combined Trastuzumab and the Hsp90 Inhibitor Auy922 in Advanced Non-Small-Cell Lung Cancer (Nsclc) with Her2 Overexpression or Amplification or Mutation. Ann Oncol 2014. [DOI: 10.1093/annonc/mdu349.17] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Reis H, Hager T, Witzke O, Theegarten D. Kavernöse pulmonale Zygomykose mit letaler Gefäßarrosion nach Nierentransplantation. Pneumologie 2014. [DOI: 10.1055/s-0034-1367852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Hager T, Reis H, Trübner K, Theegarten D. Pathologie und Klinik der letal verlaufenden Influenza. Pneumologie 2014. [DOI: 10.1055/s-0034-1367850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Reis H, Luis JM, Garcia−Borràs M, Kirtman B. Computation of Nonlinear Optical Properties of Molecules with Large Amplitude Anharmonic Motions. III. Arbitrary Double-Well Potentials. J Chem Theory Comput 2013; 10:236-42. [DOI: 10.1021/ct400938a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Coe BJ, Avramopoulos A, Papadopoulos MG, Pierloot K, Vancoillie S, Reis H. Theoretical modelling of photoswitching of hyperpolarisabilities in ruthenium complexes. Chemistry 2013; 19:15955-63. [PMID: 24123546 PMCID: PMC4068215 DOI: 10.1002/chem.201301380] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2013] [Indexed: 11/17/2022]
Abstract
Static excited-state polarisabilities and hyperpolarisabilities of three RuII ammine complexes are computed at the density functional theory (DFT) and several correlated ab initio levels. Most accurate modelling of the low energy electronic absorption spectrum is obtained with the hybrid functionals B3LYP, B3P86 or M06 for the complex [RuII(NH3)5(MeQ+)]3+ (MeQ+=N-methyl-4,4′-bipyridinium, 3) in acetonitrile. The match with experimental data is less good for [RuII(NH3)5L]3+ (L=N-methylpyrazinium, 2; N-methyl-4-{E,E-4-(4-pyridyl)buta-1,3-dienyl}pyridinium, 4). These calculations confirm that the first dipole- allowed excited state (FDAES) has metal-to-ligand charge-transfer (MLCT) character. Both the solution and gas-phase results obtained for 3 by using B3LYP, B3P86 or M06 are very similar to those from restricted active-space SCF second-order perturbation theory (RASPT2) with a very large basis set and large active space. However, the time-dependent DFT λmax predictions from the long-range corrected functionals CAM-B3LYP, LC-ωPBE and wB97XB and also the fully ab initio resolution of identity approximate coupled-cluster method (gas-phase only) are less accurate for all three complexes. The ground state (GS) two-state approximation first hyperpolarisability β2SA for 3 from RASPT2 is very close to that derived experimentally via hyper-Rayleigh scattering, whereas the corresponding DFT-based values are considerably larger. The β responses calculated by using B3LYP, B3P86 or M06 increase markedly as the π-conjugation extends on moving along the series 2→4, for both the GS and FDAES species. All three functionals predict substantial FDAES β enhancements for each complex, increasing with the π-conjugation, up to about sevenfold for 4. Also, the computed second hyperpolarisabilities γ generally increase in the FDAES, but the results vary between the different functionals.
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Suttorp AC, Heike M, Fähndrich M, Reis H, Lorenzen J. [Heterotopic sebaceous glands in the esophagus: case report with review of the literature]. DER PATHOLOGE 2013; 34:162-4. [PMID: 23111754 DOI: 10.1007/s00292-012-1714-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Heterotopia of sebaceous glands is a very rare endoscopically indistinct benign finding in the esophagus. To date only 30 cases have been reported in the literature. The lesions exhibit a considerable variation in number and size. No malignant transformation has yet been reported. From the pathologists' point of view an inflammatory or neoplastic process has to be excluded as the cause of the non-distinctive endoscopic findings.
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Wenger FA, Szucsik E, Hoinoiu BF, Ionac M, Walz MK, Schmid KW, Reis H. A new anastomotic leakage model in circular double stapled colorectal anastomosis after low anterior rectum resection in pigs. J INVEST SURG 2013; 26:364-72. [PMID: 23957829 DOI: 10.3109/08941939.2013.818174] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
BACKGROUND A high incidence of anastomotic leakage (37.5%) is reported after low anterior rectal resection (LAR) and circular double-stapled anastomosis without protective ileostoma. Since the pathomechanism of anastomosis leakage is still unclear, a suitable animal model would be most desirable. METHODS The objective was to assess the incidence of clinically apparent and inapparent leakage after LAR in pigs (n = 20). Endpoints were radiological, clinical, macroscopic, and histologic proof of anastomotic leakage on the 9th postoperative day. Integrity of anastomosis was assessed by double-contrast barium examination on 9th postoperative day. Animals were sacrificed and anastomoses were resected for histopathological investigation. In case of earlier clinical apparent anastomotic leakage, radiologic double-contrast barium was performed immediately. RESULTS LAR with a circular double-stapled anastomosis without protective ileostoma was performed in 20 pigs (m:f = 8:12). Length of resection was 10-20 cm, anastomosis was performed 7 cm ab ano. Five animals (25%) developed clinical apparent anastomotic leakage (no appetite, fever, inactivity, tachypnea, discomfort, pain) between the 6th (n = 1) and 9th (n = 4) postoperative day, proven by double-contrast barium radiographs. Additionally in 1 animal clinical inapparent anastomotic insufficiency was observed radiologically. Total rate of leakage was 30% (n = 6). These results were confirmed by leucocytosis, low potassium levels, in two cases high ALT and AST and local peritonitis in all cases. CONCLUSION Including one additional case of clinical inapparent leakage, total rate of anastomotic leakage was 30% (6/20). Thus we managed to establish a new experimental model of anastomotic leakage after low rectal resection comparable to the human situation.
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