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Gastrin and antral G cells in course of Helicobacter pylori eradication: Six months follow up study

World Journal of Gastroenterology 2005年第27期11卷 4140-4147页

作者： Aleksandra Sokic-Milutinovic vera todorovic Tomica Milosavljevic Marjan Micev Neda Drndarevic Olivera Mitrovic Clinic for Gastroenterology and Hepatology Department of Imunohistochemistry and Electron Microscopy Pathology Department

AIM： To assess long-term effects of Helicobacter pylori （H pylon} eradication on antral G cell morphology and function in patients with and without duodenal ulcer （DU）.METHODS： Consecutive dyspeptic patients referred to the endoscopy entered the study. Out of 39 Hpylori positive patients, 8 had DU （Hpylori ＋DU） and 31 gastritis （Hpylori＋G）. Control groups consisted of 11 uninfected dyspeptic patients （CG1） and 7 healthy volunteers （CG2）. Basal plasma gastrin （PGL）, antral tissue gastrin concentrations （ATGC）, immunohistochemical and electron microscopic characteristics of G cells were determined, prior to and 6 mo after ***： We-demonstrated elevated PGL in infected patients compared to uninfected controls prior to *** PGL were registered in all Hpylori＋patients （Hpylori＋DU： 106.78＋22.72 pg/mL, Hpylori＋G： 74.95＋15.63,CGI： 68.59＋17.97, CG2：39.24＋5.59 pg/mL, P〈0.01）.Successful eradication （e） therapy in Hpylori＋patients lead to significant decrease in PGL （Hpylori＋DU： 59.93＋9.40 and Hpylori＋Ge： 42.36＋10.28 pg/mL, P〈0.001）. ATGC at the beginning of the study were similar in infected and uninfected patients and eradication therapy lead to significant decrease in ATGC in Hpylori＋gastritis, but not in DU patients. In the Hpylori＋DU patients, the mean number of antral G cells was significantly lower in comparison with all other groups （P〈0.01）, but after successful eradication was close to normal values found in controls. By contrast, G cell number and volume density were significantly decreased （P〈0.01） in Hpylori＋Ge group after successful eradication therapy （294＋32 and 0.31＋0.02,respectively）, in comparison to values before eradication （416~40 and 0.48~0.09）. No significant change of the G cell/total endocrine cell ratio was observed during the 6 mo of follow up in any of the groups. A reversible increase in G cell secretory function was seen in all infected individuals, demonstrated by a more prominent secretory apparatus. However, differences b

关键词： Gastrin G cell Duodenal ulcer Gastritis He/icobacter py/ori

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Expression of cytokeratins in Helicobacter pylori-associated chronic gastritis of adult patients infected with cagA+strains:An immunohistochemical study

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World Journal of Gastroenterology 2006年第12期12卷 1865-1873页

作者： vera todorovic Neda Drndarevic Olivera Mitrovic Institutefor MedicalResearch Aleksandra Sokic-Milutinovic Tomica Milosavljevic Marjan Micev Ivan Nikolic Thomas Wex Peter Malfertheiner Institute for Medical Research Department for Immunohistochemistry and Electron MicroscopyBelgradeSerbia and Montenegro Clinic for Gastroenterology and Hepatology Institute for Digestive DiseasesClinical Center of SerbiaBelgradeSerbia and Montenegro Pathology Department Institute for Digestive DiseasesClinical Center of SerbiaBelgradeSerbia and Montenegro Institute of Histology and Embryology Faculty of MedicineUniversity of NisSerbia and Montenegro Clinic for Gastroenterology Hepatology and Infectious DiseasesOtto-von-Guericke UniversityMagdeburgGermany

AIM： To investigate the expression of different cytokeratins （CKs） in gastric epithelium of adult patients with chronic gastritis infected with Helicobacter pylori （H pylon） cagA ＋ strains. METHODS： The expression of CK 7, 8, 18, 19 and 20 was studied immunohistochemically in antral gastric biopsies of 84 patients. All the CKs were immunostained in cagA＋Hpylori gastritis （57 cases）, non-Hpylori gastritis （17 cases） and normal gastric mucosa （10 cases）. RESULTS： In cagA＋ H pylori gastritis, CK8 was expressed comparably to the normal antral mucosa from surface epithelium to deep glands. Distribution of CK18 and CK 19 was unchanged, i.e. transmucosal, but intensity of the expression was different in foveolar region in comparison to normal gastric mucosa. Cytokeratin 18 immunoreactivity was significantly higher in the foveolar epithelium of H pylori-positive gastritis compared to both Hpylori-negative gastritis and controls. On the contrary, decrease in CK19 immunoreactivity occurred in foveolar epithelium of H pylori-positive gastritis. In both normal and inflamed antral mucosa without Hpyloriinfection, CK20 was expressed stronglyl moderately and homogenously in surface epithelium and upper foveolar region, but in H pylod -induced gastritis significant decrease of expression in foveolar region was noted. Generally, in both normal antral mucosa and H pylori-negative gastritis, expression of CK7 was not observed, while in about half cagA＋ H pylori-infected patients, moderate focal CK7 immunoreactivity of the neck and coiled gland areas was registered, especially in areas with more severe inflammatory infiltrate. CONCLUSION： Alterations in expression of CK 7, 18, 19 and 20 together with normal expression of CK8 occur in antral mucosa of H pylori-associated chronic gastritis in adult patients infected with cagA＋ strains. Alterations in different cytokeratins expression might contribute to weakening of epithelial tight junctions observed in H pylori-infected gastric m

关键词： cytokeratin 7 cytokeratin 8 cytokeratin18 cytokeratin19 cytokeratin20 Helicobacter pylori Gastritis CagA

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Intraoperative endoscopy in obstructive hypopharyngeal carcinoma

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World Journal of Gastroenterology 2006年第28期12卷 4561-4564页

作者： Predrag Pesko Milos Bjelovic Predrag Sabljak Dejan Stojakov Ebrahimi Keramatollah Dejan Velickovic Bratislav Spica Branka Nenadic Aleksandra Djuric-Stefanovic Djordjije Saranovic vera todorovic Department of Esophagogastric Surgery First Surgical University HospitalClinical Center of SerbiaBelgradeSerbia and Montenegro Institute of Anesthesiology First Surgical University HospitalClinical Center of SerbiaBelgradeSerbia and Montenegro Department of Radiology First Surgical University HospitalClinical Center of SerbiaBelgradeSerbia and Montenegro Institute of Medical Investigations BelgradeSerbia and Montenegro

AIM： To demonstrate the necessity of intraoperative endoscopy in the diagnosis of secondary primary tumors of the upper digestive tract in patients with obstructive hypopharyngeal carcinoma. METHODS： Thirty-one patients with hypopharyngeal squamous cell carcinoma had been operated, with radical intent, at our Institution in the period between 1978 and 2004. Due to obstructive tumor mass, in 7 （22.6%） patients, preoperative endoscopic evaluation of the esophagus and stomach could not be performed. In those patients, intraoperative endoscopy, made through an incision in the cervical esophagus, was standard diagnostic method for examination of the esophagus and stomach. RESULTS： We found synchronous foregut carcinomas in 3 patients （9.7%）. In two patients, synchronous carcinomas had been detected during preoperative endoscopic evaluation, and in one （with obstructive carcinoma） using intraoperative endoscopy. In this case, preoperative barium swallow and CT scan did not reveal the existence of second primary tumor within esophagus, despite the fact that small, but T2 carcinoma, was present. CONCLUSION： It is reasonable to use intraoperative endoscopy as a selective screening test in patients with obstructive hypopharyngeal carcinoma.

关键词： Hypopharynx Neoplasms Squamous cell Endoscopy Multiple primary Synchronous tumors

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Three Neutrinos and the Formula for the Dirac CP Violation Phase

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Journal of High Energy Physics, Gravitation and Cosmology 2023年第4期9卷 1259-1282页

作者： Zoran B. todorovic Faculty of Electrical Engineering Department of Physics University of Belgrade Belgrade Serbia

Based on the derived equations of three neutrinos, especially for motion through a physical vacuum and for space with a constant density of matter, the same formula for Dirac’s CP-violating phase was obtained. The main property of this formula is that it does not depend on mixing angles θ12, θ13, θ23 and remains unchanged for the spaces through which the neutrino beam moves. Using that formula, the final form for the Jarlskog invariant formula was formed. Knowing the Dirac CPV phase would have the following consequences: 1) By obtaining an explicit mathematical formula for the Dirac CPV phase, it would no longer be necessary to perform computer simulations to draw areas where it could be found. 2) At the same time, the Dirac CPV phase does not depend on the mixing angles θ12, θ13, θ23 that make up the elements of the PMNS matrix, but depends only on the ratio of the corresponding differences of the squares of the neutrino masses.

关键词： Ordinary Neutrino PMNS Matrix Dirac CPV Phase Jarlskog Invariant

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Solving the Three-Neutrino Problem as One of the Three-Body Problems in Physics

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Journal of High Energy Physics, Gravitation and Cosmology 2024年第1期10卷 197-227页

作者： Zoran B. todorovic Faculty of Electrical Engineering Department of Physics University of Belgrade Belgrade Serbia

By using the standard PMNS (Pontecorvo-Maki-Nakagawa-Sakata) mixing matrix and applying the rule for the sum of the oscillation probabilities of three neutrinos, the equations of motion were derived in which the Dirac CP violating phase appeared as an unknown quantity. The equations of motion were separately derived for each of the three possible transitions for flavor-neutrino oscillations. Two roots of those equations were obtained in the form of two formulas for the Dirac CP violating phase with opposite signs. In the mathematical sense, the connection between those formulas was established in order to maintain the continuous process of oscillation of three neutrinos. This made it possible to calculate the numerical value for the Dirac CP violating phase, the Jarlskog invariant and to write the general form of the PMNS mixing matrix in the final form in which all its elements are defined with explicit numerical values.

关键词： Ordinary Neutrino PMNS Matrix Dirac CPV Phase Jarlskog Invariant

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The Equation for the CP Violating Phase for Quarks: The Rule for the Sum of Quark Oscillation Probabilities

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Journal of High Energy Physics, Gravitation and Cosmology 2024年第4期10卷 1835-1865页

作者： Zoran B. todorovic Department of Physics Faculty of Electrical Engineering University of Belgrade Belgrade Serbia

By applying the rules for the sum of quark oscillation probabilities for the original CKM matrix and for Wolfenstein’s parameterization, equations were derived in which the CP violating phase for quarks appears as an unknown quantity. Quark oscillations occur in spaces that are on the femtometer scale and they are unmeasurable from the point of view of experiments. However, the consequence of those oscillations is the CP violating phase for quarks, which is measured through unitary triangles in Wolfenstein’s parameterization. Through the mathematical model presented in this paper, the equation in Wolfenstein’s parameterization was derived, the root of which is consistent with measurements in today’s quark physics.

关键词： Quarks CKM Matrix PMNS Matrix Wolfenstein Parameterization CP Violation Phase Jarlskog Invariant

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Mushroomβ-glucan and polyphenol formulations as natural immunity boosters and balancers:nature of the application

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Food Science and Human Wellness 2023年第2期12卷 378-396页

作者： Maja Kozarski Anita Klaus Leo van Griensven Dragica Jakovljevic Nina todorovic Wan Abd Al Qadr Imad Wan-Mohtar Jovana Vunduk Institute of Food Technology and Biochemistry Faculty of AgricultureUniversity of BelgradeBelgrade 11080Serbia Plant Research International Wageningen University and Research CentreWageningen 6700 AAThe Netherlands Institute of Chemistry Technology and MetallurgyUniversity of BelgradeBelgrade 11000Serbia Functional Omics and Bioprocess Development Laboratory Institute of Biological SciencesFaculty of ScienceUniversiti MalayaKuala Lumpur 50603Malaysia Institute of General and Physical Chemistry University of BelgradeBelgrade 11158Serbia

Mushrooms are experiencing a kind of renaissance as a part of the contemporary human *** valuable organisms are more than food,they fit in perfectly as a novel market group known as ***-balancing mushroom dietary fibers and secondary metabolites such as polyphenols are the main focus of the healthcare *** and cosmetic companies are increasingly using mushroom extracts rich in these *** review considers the basic molecular immunomodulatory mechanisms of action of the most commonly used mushroom dietary fibers,β-*** literature data on their bioavailability,metabolic transformations,preclinical and human clinical research,and safety are *** mechanisms of polyphenol ingredients are also *** molecules present great potential in the design of the new immunity balancer formulations according to their widespread structural ***,we draw attention to the perspectives of modern trends in mushroom nutraceutical and cosmeceutical formulations to strengthen and balance immunity.

关键词： Mushrooms β-Glucan Polyphenols Immunity boosters Superfood Natural cosmetics

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Testing the Results of Measurements of Neutrino Parameters Using the Dirac CPV Phase Formula

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Journal of High Energy Physics, Gravitation and Cosmology 2023年第4期9卷 1283-1310页

作者： Zoran B. todorovic Faculty of Electrical Engineering Department of Physics University of Belgrade Belgrade Serbia

Essentially the main intention of this paper was to test the formula for the Dirac CPV phase and see if it can reflect the results of experimental measurements of neutrino parameters. By knowing the mathematical formula for the Dirac CPV phase, a connection was established with some of the residual symmetry groups, which made it possible to develop a procedure for directly determining the range in which the numerical value for the Dirac CPV phase could be found. In this sense, two different sources of information containing measured data for neutrinos were used for the corresponding calculations, and then a comparative overview of the calculated results was presented. It is particularly emphasized that the formula for the Dirac CPV phase does not depend on the mixing angles that are incorporated into the PMNS matrix, but only on the ratio between the corresponding squares of the neutrino mass difference. All the numerous results obtained from the corresponding calculations for the Dirac CPV phase point to the justified introduction of the theory that is related to three neutrinos, and thus the agreement of our results with the STEREO experiment is justified, so that the hypothesis of the possible existence of a sterile neutrino in nature should be excluded.

关键词： Ordinary Neutrino PMNS Matrix Dirac CPV Phase Jarlskog Invariant Residual Discrete Symmetry Group

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Determining the Neutrino Mass Eigenstates and the Effective Majorana Mass

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Journal of High Energy Physics, Gravitation and Cosmology 2022年第3期8卷 593-622页

作者： Zoran B. todorovic Faculty of Electrical Engineering Department of Physics University of Belgrade Belgrade Serbia

This paper aims at solving several open questions in current neutrino physics: the neutrino mass hierarchy, the Dirac CP violating phase, the absolute mass of neutrinos, the nature of neutrinos (Dirac or Majorana), the Majorana matrix and the absolute value of the effective Majorana neutrino mass. In the research presented in this paper, we have shown that the precise definition of the mass splittings between neutrino mass eigenstates, done in the latest analysis of experimental data, can be of crucial importance for defining the nature of neutrino mass hierarchy. The Standard Model has three generations of fundamental matter particles. Three generations of the charged lepton mass show a hierarchical structure: mτ > mμ > me. Owing to that, there is a belief and it is considered that neutrinos may follow such hierarchical structure. In our calculations, we have also included the latest data obtained, based on the processing of measurement results, which showed that even with such data, obtained results favor the normal neutrino mass hierarchy. As for the individual neutrino mass calculated in this paper, in today’s neutrino physics it is only known that neutrino mass scale is bounded only from above, and both the Dirac and the Majorana character of neutrinos are compatible with all observations. Among some of the questions resolved in this paper, which are related to the properties of neutrinos, a positive answer was also given to the question of whether light neutrinos are self-conjugate particles or not.

关键词： Special Relativity Leptons Ordinary Neutrino Neutrino Mass and Mixing PMNS Matrix Jarlskog Invariant Majorana Mass

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Primary gastric mucosa associated lymphoid tissue lymphoma: Clinical data predicted treatment outcome

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World Journal of Gastroenterology 2008年第15期14卷 2388-2393页

作者： Milena todorovic Bela Balint Miodrag Jevtic Nada Suvajdzic Amela Ceric Dragana Stamatovic Olivera Markovic Maja Perunicic Slobodan Marjanovic Miodrag Krstic Institute of Hematology Clinical Center of Serbia Belgrade Serbia Institute for Medical Research Belgrade University Belgrade Serbia Military Medical Academy Belgrade Serbia Clinic for Internal Medicine Clinical Center Banja Luka Banjaluka Bosnia and Hercegovina Clinical Hospital Bezanijska Kosa Belgrade Serbia Institute for Digestive Disease Clinical Center of Serbia Belgrade Serbia

AIM: To determine clinical characteristics and treatment outcome of gastric lymphoma after chemotherapy and immuno-chemotherapy. METHODS: Thirty four patients with primary gastric mucosa associated lymphoid tissue (MALT) lymphoma (Ann Arbor stages Ⅰ to Ⅳ) were enrolled. All had upper gastric endoscopy, abdominal ultrasonography, CT and H pylori status assessment (histology and serology). After anti-H pylori treatment and initial chemotherapy, patients were re-examined every 4 mo. RESULTS: Histological regression of the lymphoma was complete in 22/34 (64.7%) and partial in 9 (26.5%) patients. Median follow up time for these 31 responders was 60 mo (range 48-120). No regression was noted in 3 patients. Among the 25 (73.5%) H pylori positive patients, the eradication rate was 100%.CONCLUSION: Using univariate analysis, predictive factors for overall survival were international prognostic index (IPI) score, hemoglobin level, erythrocyte sedimentation rate (ESR), and platelet numbers (P < 0.005). In addition to this, Cox proportion hazard model differentiate IPI score, ESR, and platelets as predictors of survival.

关键词： MALT lymphoma Prognostic factors Clinical features Treatment

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