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  1. Article ; Online: Ultraviolet B-induced inflammation in the rat: a model of secondary hyperalgesia?

    Davies, Emily K / Boyle, Yvonne / Chizh, Boris A / Lumb, Bridget M / Murrell, Joanna C

    Pain

    2011  Volume 152, Issue 12, Page(s) 2844–2851

    Abstract: Cutaneous inflammation induced by ultraviolet (UV) irradiation in the UV-B range has received ... sensitivities in the area of primary hyperalgesia are well documented in both the rat and human UV-B models ... mechanical hyperalgesia in the rat UV-B model. Additionally, we investigated whether secondary hyperalgesia was enhanced ...

    Abstract Cutaneous inflammation induced by ultraviolet (UV) irradiation in the UV-B range has received significant recent interest as a translational inflammatory pain model. Changes in thermal and mechanical sensitivities in the area of primary hyperalgesia are well documented in both the rat and human UV-B models, but the occurrence of secondary mechanical hyperalgesia is controversial. We investigated the occurrence of secondary mechanical hyperalgesia in the rat UV-B model. Additionally, we investigated whether secondary hyperalgesia was enhanced by heat rekindling of UV-B-irradiated skin as a new rat inflammatory model of sensitisation with an enhanced central contribution. UV-B irradiation (1000 mJ/cm(2)) induced significant secondary mechanical hyperalgesia and allodynia that peaked at 48 h. Heat rekindling (45 °C stimulus for 5 min) of UV-B-irradiated skin at 24h further enhanced and prolonged this secondary mechanical hyperalgesia and allodynia, with a peak at 72 h. Heat rekindling also induced a significant mechanical hyperalgesia and allodynia on the contralateral hind paw, further suggesting the contribution of central sensitisation. Our data provide strong evidence for a central contribution in both the rat UV-B pain model and an enhanced contribution in the new model combining UV-B irradiation with heat rekindling. We also elucidate potential differences in the methods used by ourselves and others to obtain mechanical withdrawal thresholds in rats, which may explain the lack of secondary hyperalgesia in the rat UV-B model.
    MeSH term(s) Animals ; Dermatitis/etiology ; Dermatitis/physiopathology ; Disease Models, Animal ; Hyperalgesia/drug therapy ; Hyperalgesia/etiology ; Hyperalgesia/physiopathology ; Inflammation Mediators/adverse effects ; Inflammation Mediators/physiology ; Male ; Rats ; Rats, Wistar ; Ultraviolet Rays/adverse effects
    Chemical Substances Inflammation Mediators
    Language English
    Publishing date 2011-10-21
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 193153-2
    ISSN 1872-6623 ; 0304-3959
    ISSN (online) 1872-6623
    ISSN 0304-3959
    DOI 10.1016/j.pain.2011.09.015
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Antiallodynic effects of NMDA glycine(B) antagonists in neuropathic pain: possible peripheral mechanisms.

    Christoph, Thomas / Reissmüller, Elke / Schiene, Klaus / Englberger, Werner / Chizh, Boris A

    Brain research

    2005  Volume 1048, Issue 1-2, Page(s) 218–227

    Abstract: ... of chronic pain the effects of NMDA antagonists at the glycine(B) site with different central access. L-701,324 ...

    Abstract NMDA receptors are implicated in central sensitisation underlying chronic pain, and NMDA antagonists have a potential for the treatment of neuropathic pain. Functional NMDA receptors are also present on primary afferents, where they may play a role in pro-nociceptive plasticity. The importance of this mechanism in neuropathic pain remains unclear. In the present work, we have compared in models of chronic pain the effects of NMDA antagonists at the glycine(B) site with different central access. L-701,324 (the centrally active antagonist) and 5,7-dichlorokynurenic acid (5,7-DCK, known to have limited central access) were tested after systemic administration in rats in the formalin test and in two models of neuropathic pain. The ability of these compounds to exert central actions (sedation, ataxia) was tested in the open field locomotion test; central NMDA antagonism in vivo was tested in anaesthetised rats on responses of spinal cord neurones to iontophoretic NMDA. Both L-701,324 (2.15-21.5 mg/kg i.p.) and 5,7-DCK (10-46.4 mg/kg i.v.) dose-dependently inhibited Phase II of formalin-evoked behaviour. Likewise, both compounds reversed cold allodynia in the chronic constriction injury model and tactile allodynia in animals with spinal nerve ligation. However, only L-701,324 was able to inhibit neuronal responses to NMDA in the antihyperalgesic dose range; 5,7-DCK was inactive on NMDA responses up to 46.4 mg/kg i.v. or 68.1 mg/kg i.p. Consistent with the lack of inhibition of central NMDA-evoked activity, 5,7-DCK did not alter spontaneous behaviour in the open field test, whereas it was significantly inhibited by L-701,324. Thus, peripheral NMDA receptors may substantially contribute to the efficacy of NMDA antagonists in neuropathic pain.
    MeSH term(s) Action Potentials/drug effects ; Animals ; Constriction, Pathologic/complications ; Disease Models, Animal ; Dose-Response Relationship, Drug ; Drug Administration Routes ; Drug Interactions ; Excitatory Amino Acid Agonists/pharmacology ; Excitatory Amino Acid Antagonists/administration & dosage ; Kynurenic Acid/administration & dosage ; Kynurenic Acid/analogs & derivatives ; Ligation/methods ; Male ; N-Methylaspartate/pharmacology ; Neuralgia/drug therapy ; Neuralgia/etiology ; Neurons, Afferent/drug effects ; Neurons, Afferent/physiology ; Pain Measurement/methods ; Quinolones/administration & dosage ; Rats ; Rats, Sprague-Dawley ; Spinal Cord/cytology ; Spinal Nerves/injuries ; Spinal Nerves/physiopathology ; Time Factors
    Chemical Substances Excitatory Amino Acid Agonists ; Excitatory Amino Acid Antagonists ; Quinolones ; N-Methylaspartate (6384-92-5) ; Kynurenic Acid (H030S2S85J) ; L 701324 (I9WY146163) ; 5,7-dichlorokynurenic acid (T61ORK73PY)
    Language English
    Publishing date 2005-06-28
    Publishing country Netherlands
    Document type Comparative Study ; Journal Article
    ZDB-ID 1200-2
    ISSN 1872-6240 ; 0006-8993
    ISSN (online) 1872-6240
    ISSN 0006-8993
    DOI 10.1016/j.brainres.2005.04.081
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Rofecoxib attenuates both primary and secondary inflammatory hyperalgesia: a randomized, double blinded, placebo controlled crossover trial in the UV-B pain model.

    Sycha, Thomas / Anzenhofer, Sebastian / Lehr, Stephan / Schmetterer, Leopold / Chizh, Boris / Eichler, Hans-Georg / Gustorff, Burkhard

    Pain

    2004  Volume 113, Issue 3, Page(s) 316–322

    Abstract: ... observed. These data confirm peripheral effects of rofecoxib in a human inflammatory UV-B pain model and ...

    Abstract The analysis of drug's influence on peripheral and central sensitisation can give useful information about its mode of action and can lead to more efficacy in the treatment of pain. Peripheral inflammation is associated with peripheral expression and up-regulation of cyclooxygenase 2 (COX-2) in the CNS. The relative contribution of COX-2 mediated central sensitisation may be prominent under inflammatory conditions. In this randomized, double blinded, placebo controlled cross-over trial the effects of multidoses of the COX-2 selective inhibitor rofecoxib on primary and secondary hyperalgesia were evaluated in the UVB pain model. Twenty-four hours after local UVB irradiation at the upper leg of 42 healthy volunteers heat pain perception (HPPT) and heat pain tolerance thresholds (HPTT) were assessed within the inflammation. The area of secondary hyperalgesia was determined by pin prick test. Subjects received oral rofecoxib 50, 250, 500 mg or placebo. Pain testing was repeated after 3 and 6 h. Compared to placebo, rofecoxib significantly increased HPPT (1.55 and 1.08 degrees C, P<0.0001 and P=0.0333), HPTT (1.74 and 1.58 degrees C, P<0.0001 and P<0.0001), and reduced the mean area of secondary hyperalgesia by 15.6% (P=0.007) and 16.8% (P<0.001) after 3 and 6 h. No significant difference between the three dosage groups was observed. These data confirm peripheral effects of rofecoxib in a human inflammatory UV-B pain model and provide circumstantial evidence that even a standard clinical dose of rofecoxib reduces central hyperalgesia in inflammatory pain. We confirm that the effect of single oral dose of rofecoxib plateaus at 50 mg.
    MeSH term(s) Adult ; Cross-Over Studies ; Cyclooxygenase Inhibitors/therapeutic use ; Dose-Response Relationship, Drug ; Dose-Response Relationship, Radiation ; Double-Blind Method ; Drug Administration Schedule ; Female ; Humans ; Hyperalgesia/drug therapy ; Hyperalgesia/etiology ; Inflammation/complications ; Lactones/therapeutic use ; Male ; Pain Measurement ; Pain Threshold/drug effects ; Placebos ; Regional Blood Flow/physiology ; Skin/blood supply ; Sulfones/therapeutic use ; Time Factors ; Ultraviolet Rays/adverse effects
    Chemical Substances Cyclooxygenase Inhibitors ; Lactones ; Placebos ; Sulfones ; rofecoxib (0QTW8Z7MCR)
    Language English
    Publishing date 2004-11-29
    Publishing country United States
    Document type Clinical Trial ; Comparative Study ; Journal Article ; Randomized Controlled Trial
    ZDB-ID 193153-2
    ISSN 1872-6623 ; 0304-3959
    ISSN (online) 1872-6623
    ISSN 0304-3959
    DOI 10.1016/j.pain.2004.11.002
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: [Cryosurgery, reloading and renewal].

    Chizh, N A / Sandomirskiĭ, B P

    Klinichna khirurhiia

    2011  , Issue 6, Page(s) 53–55

    Abstract: The work constitutes an attempt to analyze and to determine the causes of problems concerning the cryosurgical methods of treatment development as well as the possible ways of their solving, Along with vivid progress in cryosurgical technologies taking ... ...

    Abstract The work constitutes an attempt to analyze and to determine the causes of problems concerning the cryosurgical methods of treatment development as well as the possible ways of their solving, Along with vivid progress in cryosurgical technologies taking place, cryosurgery is developing actively and need the conduction of profound scientific investigations in this field. It is possible to reveal a real potential of cryosurgery after scientific experimental--practical base creation, aiming at introduction of cryosurgical methods in a full volume into clinical medicine.
    MeSH term(s) Cryosurgery/instrumentation ; Cryosurgery/methods ; Cryosurgery/trends ; Humans ; Surgical Equipment/standards
    Language Russian
    Publishing date 2011-06
    Publishing country Ukraine
    Document type English Abstract ; Journal Article
    ZDB-ID 411775-x
    ISSN 0023-2130
    ISSN 0023-2130
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: CARDIAC ELECTROPHYSIOLOGICAL INDICES AND PEPTIDE MOLECULAR-MASS DISTRIBUTION IN BLOOD SERUM OF RATS WITH EXPERIMENTAL MYOCARDIAL INFARCTION

    Chizh M. O. / Galchenko S. S. Ye.

    Вісник проблем біології і медицини, Vol 2, Iss 1, Pp 192-

    2019  Volume 197

    Abstract: ... ECG) were recorded with digital ECG Poly-Spectrum 8/B system (Neorsoft, Russia). To determine ...

    Abstract Recent studies demonstrate an increasing interest to cardio-vascular biomarkers with assessing the risk in heart ischemic disease. Along with cardiac electrophysiological indices the molecular-mass distribution of peptides appears as one of novel markers of the risk of cardiovascular complications, since they indicate the effect on developing unfavorable cardiovascular events. Fluorescent probes are also applied for diagnosis and forecasting the developing diseases, revealing the risk factors and control of the treatment efficiency. Research aim was to analyze the changes in electrophysiological indices of heart, molecular-mass distribution of peptides in blood serum and albumin loading with ligands during developing necrosis and remodeling of heart with experimental infarction in rats. Research object and methods. Experiments were performed in 30 outbred male rats of 180-250 g weight under inhalation anestheticon spontaneous breath under the regulations approved by the Bioethics Committee of the IPC&Ñ of the National Academy of Sciences of Ukraine. Myocardial necrosis was simulated by left anterior descending coronary artery ligation. Electrocardiograms (ECG) were recorded with digital ECG Poly-Spectrum 8/B system (Neorsoft, Russia). To determine the molecular weight distribution of low molecular weight fractions of peptide nature, the method of highly effective gel permeation chromatography was used. Fluorescence probes K-35 and E-176, synthesized at State Scientific Institution Institute for Single Crystals of the National Academy of Sciences of Ukraine (Kharkiv) was used the studies. The fluorescence spectra were recorded with a Cary Eclipse spectrometry (Varian, Australia). Microcal Origin 6.0 was used to process and visualize the spectra. Experimental studies were performed at days 1, 7, 14 and 30. The results were statistically processed with Kruskal-Wallis criterion using the STATISTICA 6.0 software (StatSoft, USA).Results. During the entire observation period, the electrocardiographic indices noted ...
    Keywords myocardial infarction ; electrocardiography ; blood serum ; peptides ; fluorescent probes ; Medicine ; R ; Biology (General) ; QH301-705.5
    Subject code 610
    Language English
    Publishing date 2019-04-01T00:00:00Z
    Publisher Ukrainian Medical Stomatological Academy
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  6. Article: Novel approaches to targeting glutamate receptors for the treatment of chronic pain: review article.

    Chizh, B A

    Amino acids

    2002  Volume 23, Issue 1-3, Page(s) 169–176

    Abstract: ... some modulatory sites at the NMDA receptor (glycine(B) and NR2B-subtype selective antagonists), as well as kainate ...

    Abstract Glutamatergic mechanisms are implicated in acute and chronic pain, and there is a great diversity of glutamate receptors that can be used as targets for novel analgesics. Some approaches, e.g. NMDA receptor antagonism, have been validated clinically, however, the central side-effects have remained the main problem with most compounds. Recently, some novel approaches have been explored as new compounds targeting some modulatory sites at the NMDA receptor (glycine(B) and NR2B-subtype selective antagonists), as well as kainate and metabotropic glutamate receptors, have been discovered. Many of these compounds have demonstrated efficacy in animal models of chronic pain, and some of them appear to have a reduced side-effect liability compared to clinically tested NMDA antagonists. These recent advances are reviewed in the present work.
    MeSH term(s) Analgesics/metabolism ; Analgesics/therapeutic use ; Animals ; Excitatory Amino Acid Antagonists/therapeutic use ; Glutamic Acid/metabolism ; Humans ; Ligands ; Pain/drug therapy ; Receptors, Glutamate/metabolism
    Chemical Substances Analgesics ; Excitatory Amino Acid Antagonists ; Ligands ; Receptors, Glutamate ; Glutamic Acid (3KX376GY7L)
    Language English
    Publishing date 2002
    Publishing country Austria
    Document type Journal Article ; Review
    ZDB-ID 1121341-3
    ISSN 1438-2199 ; 0939-4451
    ISSN (online) 1438-2199
    ISSN 0939-4451
    DOI 10.1007/s00726-001-0124-4
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article: [No title information]

    Chizh, N A / Bуzov, D V / Grebenyu, A I / Аntonenko, E A / Моtko, A V / Dolgopyatenko, A D / Аvrunin, O G / Sandomirskiy, B P

    Klinichna khirurhiia

    2018  , Issue 10, Page(s) 75–78

    MeSH term(s) Academic Medical Centers/methods ; Endoscopes, Gastrointestinal/history ; Endoscopy/education ; Endoscopy/history ; Endoscopy/instrumentation ; Endoscopy/methods ; Equipment Design/history ; History, 20th Century ; History, 21st Century ; Humans ; Internship and Residency/organization & administration ; Ukraine
    Language Ukrainian
    Publishing date 2018-10-29
    Publishing country Ukraine
    Document type Historical Article ; Journal Article
    ZDB-ID 411775-x
    ISSN 0023-2130
    ISSN 0023-2130
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Book ; Online: Diffusion of hydrogen atoms in silicon layers deposited from molecular beams on dielectric substrates

    Chizh, Kirill V. / Arapkina, Larisa V. / Stavrovsky, Dmitry B. / Gaiduk, Peter I. / Yuryev, Vladimir A.

    2019  

    Abstract: In the paper, the processes occurring during low-temperature growth of non-hydrogenated amorphous Si and polycrystalline Si films on multilayer Si$_3$N$_4$/SiO$_2$/c-Si substrates from molecular beams under conditions of ultrahigh vacuum are studied in ... ...

    Abstract In the paper, the processes occurring during low-temperature growth of non-hydrogenated amorphous Si and polycrystalline Si films on multilayer Si$_3$N$_4$/SiO$_2$/c-Si substrates from molecular beams under conditions of ultrahigh vacuum are studied in detail. Diffusion of hydrogen atoms from a dielectric layer into the growing film is shown to accompany the growth of a silicon film on a Si$_3$N$_4$ layer deposited by CVD or on a SiO$_2$ layer obtained by thermal oxidation of a silicon wafer. The process of hydrogen migration from the dielectric substrates into the silicon film is studied using FTIR spectroscopy. The reduction of IR absorption at the bands related to the N$-$H bonds vibrations and the increase of IR absorption at the bands relating to the Si$-$N bonds vibrations in IR spectra demonstrate that hydrogen atoms leave Si$_3$N$_4$ layer during Si deposition from a molecular beam. The absorption band assigned to the valence vibrations of the Si$-$H bond at $\sim 2100$ cm$^{-1}$ emerging in IR spectra obtained at samples deposited both on Si$_3$N$_4$ and SiO$_2$ layers indicates the accumulation of hydrogen atoms in silicon films. The difference in chemical potentials of hydrogen atoms in the dielectric layer and the silicon film explains the transfer of hydrogen atoms from the Si$_3$N$_4$ or SiO$_2$ layer into the growing silicon film.

    Comment: 4 figures
    Keywords Condensed Matter - Materials Science
    Publishing date 2019-01-30
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  9. Book ; Online: Diffusion processes in germanium and silicon films grown on Si$_3$N$_4$ substrates

    Arapkina, Larisa V. / Chizh, Kirill V. / Stavrovskii, Dmitry B. / Dubkov, Vladimir P. / Lazareva, Elizabeth P. / Yuryev, Vladimir A.

    2020  

    Abstract: In this article, the results of investigation of processes occurring during the molecular-beam deposition of germanium layers on Si$_3$N$_4$ dielectric substrates within a wide range of the Ge film growth temperatures (30 to 600{\deg}C) are presented. ... ...

    Abstract In this article, the results of investigation of processes occurring during the molecular-beam deposition of germanium layers on Si$_3$N$_4$ dielectric substrates within a wide range of the Ge film growth temperatures (30 to 600{\deg}C) are presented. The intensity of the IR absorption bands related to the vibrations of the N$-$H and Si$-$N bonds are established to decrease with the increase of the Ge deposition temperature. It appears that this phenomenon cannot be explained only as a thermally activated process. Simultaneously, the peak corresponding to the Ge$-$N vibration bonds emerges in the X-ray photoelectron spectra. We suppose that the deposition of germanium layers on Si3N4 dielectric substrates containing hydrogen atoms causes the diffusion of hydrogen atoms from the dielectric layer into the growing film. The experimental results may be interpreted in terms of a model, according to which the migration of hydrogen atoms from the Si$_3$N$_4$ layer into the growing germanium film is due to the difference in chemical potentials of hydrogen atoms in the dielectric layer and the germanium film. This process initiates the diffusion of germanium atoms in the opposite direction, into the Si$_3$N$_4$ layer, where they connect to free bonds of nitrogen atoms arising due to the escape of hydrogen atoms. The analogous processes occur during the deposition of silicon layers on Si$_3$N$_4$ substrates.

    Comment: 38 pages, 9 figures
    Keywords Condensed Matter - Materials Science ; Condensed Matter - Mesoscale and Nanoscale Physics
    Subject code 530
    Publishing date 2020-12-18
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  10. Article: [TECHNIQUE OF EXPERIMENTAL STENTING OF VESSELS FOR INVESTIGATIONS IN VIVO].

    Byzov, D V / Chizh, N A / Mikhaylova, I P / Salogub, S D / Sandomirskiy, B P

    Klinichna khirurhiia

    2015  , Issue 11, Page(s) 68–71

    Abstract: Introduction of a new systems for the vessels stenting into clinical practice demands conduction of preclinical investigations in vivo. The method of vascular stents implantation into abdominal aorta of a rabbit, using peripheral vascular catheter, was ... ...

    Abstract Introduction of a new systems for the vessels stenting into clinical practice demands conduction of preclinical investigations in vivo. The method of vascular stents implantation into abdominal aorta of a rabbit, using peripheral vascular catheter, was presented. Successively were presented surgical aspects of the vessels stenting in experiment, estimation of functional state of the heart and aorta, morphometric indices of the stent in 30 days after operation. Introduction of the method depicted permits to simplify a surgical technique, to minimize the expanses for conduction of interventions on vessels in experiment. The method do not demand application of special endovascular equipment and may be successfully realized in environment of the general surgery operation room for conduction of experimental investigations on the stends.
    MeSH term(s) Animals ; Aorta, Abdominal/surgery ; Blood Vessel Prosthesis Implantation/instrumentation ; Blood Vessel Prosthesis Implantation/methods ; Equipment Design ; Rabbits ; Stents
    Language Ukrainian
    Publishing date 2015-11
    Publishing country Ukraine
    Document type English Abstract ; Journal Article
    ZDB-ID 411775-x
    ISSN 0023-2130
    ISSN 0023-2130
    Database MEDical Literature Analysis and Retrieval System OnLINE

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