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Žižić M, Atlagić K, Karaman M, Živić M, Stanić M, Maksimović V, Zakrzewska J. Uptake of vanadium and its intracellular metabolism by Coprinellus truncorum mycelial biomass. J Trace Elem Med Biol 2024; 83:127381. [PMID: 38211406 DOI: 10.1016/j.jtemb.2024.127381] [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] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Revised: 12/26/2023] [Accepted: 01/02/2024] [Indexed: 01/13/2024]
Abstract
BACKGROUND Fungi absorb and solubilize a broad spectrum of heavy metals such as vanadium (V), which makes them a main route of its entry into the biosphere. V as vanadate (V5+) is a potential medical agent due to its many metabolic actions such as interaction with phosphates in the cell, and especially its insulin-mimetic activity. Antidiabetic activity of V-enriched fungi has been studied in recent years, but the biological and chemical bases of vanadium action and status in fungi in general are poorly understood, with almost no information on edible fungi. METHODS This manuscript gives a deeper insight into the interaction of V5+ with Coprinellus truncorum, an edible autochthonous species widely distributed in Europe and North America. Vanadium uptake and accumulation as V5+ was studied by 51V NMR, while the reducing abilities of the mycelium were determined by EPR. 31P NMR was used to determine its effects on the metabolism of phosphate compounds, with particular focus on phosphate sugars identified using HPLC. RESULTS Vanadate enters the mycelium in monomeric form and shows no immediate detrimental effects on intracellular pH or polyphosphate (PPc) levels, even when applied at physiologically high concentrations (20 mM Na3VO4). Once absorbed, it is partially reduced to less toxic vanadyl (V4+) with notable unreduced portion, which leads to a large increase in phosphorylated sugar levels, especially glucose-1-phosphate (G1P) and fructose-6-phosphate (F6P). CONCLUSIONS Preservation of pH and especially PPc reflects maintenance of the energy status of the mycelium, i.e., its tolerance to high V5+ concentrations. Rise in G1P and F6P levels implies that the main targets of V5+ are most likely phosphoglucomutase and phosphoglucokinase(s), enzymes involved in early stages of G6P transformation in glycolysis and glycogen metabolism. This study recommends C. truncorum for further investigation as a potential antidiabetic agent.
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Affiliation(s)
- Milan Žižić
- Department of Life Sciences, University of Belgrade, Institute for Multidisciplinary Research, Kneza Višeslava 1, 11030 Belgrade, Serbia; Elettra -Sincrotrone Trieste, Strada Statale 14 - km 163, 5 in AREA Science Park, Trieste, Italy.
| | - Kristina Atlagić
- Department of Physiology and Biophysics, University of Belgrade, Faculty of Biology, Studentski trg 16, 11158 Belgrade, Serbia
| | - Maja Karaman
- Department of Biology and Ecology, Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovica 2, 21000 Novi Sad, Serbia
| | - Miroslav Živić
- Department of Physiology and Biophysics, University of Belgrade, Faculty of Biology, Studentski trg 16, 11158 Belgrade, Serbia
| | - Marina Stanić
- Department of Life Sciences, University of Belgrade, Institute for Multidisciplinary Research, Kneza Višeslava 1, 11030 Belgrade, Serbia
| | - Vuk Maksimović
- Department of Life Sciences, University of Belgrade, Institute for Multidisciplinary Research, Kneza Višeslava 1, 11030 Belgrade, Serbia
| | - Joanna Zakrzewska
- Institute of General and Physical Chemistry, Studentski trg 12, 11158 Belgrade, Serbia
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Žižić M, Stanić M, Aquilanti G, Bajuk-Bogdanović D, Branković G, Rodić I, Živić M, Zakrzewska J. Biotransformation of selenium in the mycelium of the fungus Phycomyces blakesleeanus. Anal Bioanal Chem 2022; 414:6213-6222. [PMID: 35759022 DOI: 10.1007/s00216-022-04191-4] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 06/14/2022] [Accepted: 06/21/2022] [Indexed: 11/01/2022]
Abstract
Biotransformation of toxic selenium ions to non-toxic species has been mainly focused on biofortification of microorganisms and production of selenium nanoparticles (SeNPs), while far less attention is paid to the mechanisms of transformation. In this study, we applied a combination of analytical techniques with the aim of characterizing the SeNPs themselves as well as monitoring the course of selenium transformation in the mycelium of the fungus Phycomyces blakesleeanus. Red coloration and pungent odor that appeared after only a few hours of incubation with 10 mM Se+4 indicate the formation of SeNPs and volatile methylated selenium compounds. SEM-EDS confirmed pure selenium NPs with an average diameter of 57 nm, which indicates potentially very good medical, optical, and photoelectric characteristics. XANES of mycelium revealed concentration-dependent mechanisms of reduction, where 0.5 mM Se+4 led to the predominant formation of Se-S-containing organic molecules, while 10 mM Se+4 induced production of biomethylated selenide (Se-2) in the form of volatile dimethylselenide (DMSe) and selenium nanoparticles (SeNPs), with the SeNPs/DMSe ratio rising with incubation time. Several structural forms of elemental selenium, predominantly monoclinic Se8 chains, together with trigonal Se polymer chain, Se8 and Se6 ring structures, were detected by Raman spectroscopy.
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Affiliation(s)
- Milan Žižić
- Department of Life Sciences, Institute for Multidisciplinary Research, University of Belgrade, Kneza Višeslava 1, 11030, Belgrade, Serbia.
| | - Marina Stanić
- Department of Life Sciences, Institute for Multidisciplinary Research, University of Belgrade, Kneza Višeslava 1, 11030, Belgrade, Serbia
| | | | - Danica Bajuk-Bogdanović
- Faculty of Physical Chemistry, University of Belgrade, Studentski trg 12-16, 11000, Belgrade, Serbia
| | - Goran Branković
- Department of Life Sciences, Institute for Multidisciplinary Research, University of Belgrade, Kneza Višeslava 1, 11030, Belgrade, Serbia
| | - Ivanka Rodić
- Department of Life Sciences, Institute for Multidisciplinary Research, University of Belgrade, Kneza Višeslava 1, 11030, Belgrade, Serbia
| | - Miroslav Živić
- Faculty of Biology, University of Belgrade, Studentski trg 12-16, 11000, Belgrade, Serbia
| | - Joanna Zakrzewska
- Institute of General and Physical Chemistry, Studentski trg 12-16, 11000, Belgrade, Serbia
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Mizerska U, Fortuniak W, Chojnowski J, Rubinsztajn S, Zakrzewska J, Bak-Sypien I, Nyczyk-Malinowska A. Porous SiC and SiC/C f Ceramic Microspheres Derived from Polyhydromethylsiloxane by Carbothermal Reduction. Materials (Basel) 2021; 15:81. [PMID: 35009245 PMCID: PMC8745781 DOI: 10.3390/ma15010081] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Revised: 12/03/2021] [Accepted: 12/20/2021] [Indexed: 06/14/2023]
Abstract
A simple and inexpensive method for the preparation of porous SiC microspheres is presented. Polysiloxane microspheres derived from polyhydromethylsiloxane (PHMS) cross-linked with divinylbenzene (DVB) were ceramized under conditions leading to the removal of oxygen from the material. The content of free carbon (Cf) in highly crystalline silicon carbide (SiC) particles can be controlled by using various proportions of DVB in the synthesis of the pre-ceramic material. The chemical structure of the ceramic microspheres was studied by elemental analysis for carbon and oxygen, 29Si MAS NMR, 13C MAS NMR, SEM/EDS, XRD and Raman spectroscopies, and their morphology by SEM, nitrogen adsorption and mercury intrusion porosimetries. The gaseous products of the thermal reduction processes formed during ceramization created a porous structure of the microspheres. In the SiC/Cf microspheres, meso/micro pores were formed, while in carbon-free SiC, microspheres macroporosity dominated.
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Affiliation(s)
- Urszula Mizerska
- Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, ul. Sienkiewicza 112, 90-363 Lodz, Poland; (W.F.); (J.C.); (S.R.); (J.Z.); (I.B.-S.)
| | - Witold Fortuniak
- Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, ul. Sienkiewicza 112, 90-363 Lodz, Poland; (W.F.); (J.C.); (S.R.); (J.Z.); (I.B.-S.)
| | - Julian Chojnowski
- Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, ul. Sienkiewicza 112, 90-363 Lodz, Poland; (W.F.); (J.C.); (S.R.); (J.Z.); (I.B.-S.)
| | - Slawomir Rubinsztajn
- Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, ul. Sienkiewicza 112, 90-363 Lodz, Poland; (W.F.); (J.C.); (S.R.); (J.Z.); (I.B.-S.)
| | - Joanna Zakrzewska
- Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, ul. Sienkiewicza 112, 90-363 Lodz, Poland; (W.F.); (J.C.); (S.R.); (J.Z.); (I.B.-S.)
| | - Irena Bak-Sypien
- Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, ul. Sienkiewicza 112, 90-363 Lodz, Poland; (W.F.); (J.C.); (S.R.); (J.Z.); (I.B.-S.)
| | - Anna Nyczyk-Malinowska
- Faculty of Materials Science and Ceramics, AGH-University of Science and Technology, Al. Mickiewicza 30, 30-059 Krakow, Poland;
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Abstract
Trigeminal neuralgia (TN) is a highly disabling disorder characterised by very severe, brief and electric shock like recurrent episodes of facial pain. New diagnostic criteria, which subclassify TN on the basis of presence of trigeminal neurovascular conflict or an underlying neurological disorder, should be used as they allow better characterisation of patients and help in decision-making regarding medical and surgical treatments. MR imaging, including high-resolution trigeminal sequences, should be performed as part of the diagnostic work-up. Carbamazepine and oxcarbazepine are drugs of first choice. Lamotrigine, gabapentin, pregabalin, botulinum toxin type A and baclofen can be used either alone or as add-on therapy. Surgery should be considered if the pain is poorly controlled or the medical treatments are poorly tolerated. Trigeminal microvascular decompression is the first-line surgery in patients with trigeminal neurovascular conflict while neuroablative surgical treatments can be offered if MR imaging does not show any neurovascular contact or where patients are considered too frail for microvascular decompression or do not wish to take the risk.
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Affiliation(s)
- Giorgio Lambru
- The Headache Service, Pain Management and Neuromodulation Centre, Guy's and St Thomas' Hospitals NHS Trust, London, UK
| | - Joanna Zakrzewska
- Facial Pain Clinic, Eastman Dental Hospital, London, UK
- Pain Management Centre, University College London Hospitals NHS Foundation Trust, London, UK
| | - Manjit Matharu
- Headache and Facial Pain Group, UCL Queen Square Institute of Neurology, London, UK
- Headache and Facial Pain Group, National Hospital for Neurology and Neurosurgery, London, UK
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Zakrzewska J, Uznanski P. Synthesis and characterization of bis(amine)palladium(II) carboxylate complexes as precursors of palladium nanoparticles. Dalton Trans 2021; 50:6933-6948. [PMID: 33928977 DOI: 10.1039/d1dt00638j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The synthesis and characterization of the adducts of n-alkyl amine and palladium n-alkyl carboxylate, [Pd(R2NH2)2(R1COO)2] (R1 = 1, 7, and 11; R2 = 8, 12, and 16), as precursors for the synthesis of palladium nanoparticles (PdNPs) was carried out via differential scanning calorimetry, FT-IR, Raman and UV-Vis spectroscopy, NMR spectroscopy (1H, 13C pulsed field gradient spin-echo (PGSE), and 13C CP-MAS), and powder X-ray diffraction. Pd n-alkyl carboxylates were obtained by a ligand exchange reaction from palladium acetate and the appropriate aliphatic carboxylic acid. It is proposed that carboxyl moieties in the presence of amine ligands are bound to palladium ions via monodentate bonding as opposed to bridging bidentate coordination of pure palladium carboxylate which exists in the form of polymer aggregates. All the studied palladium carboxylate/amine complexes form bilayer lamellar structures and exhibit first-order melting transitions. The evidence presented in this study shows that the phase behavior of bivalent metal carboxylates is mainly controlled by the type of coordination of carboxylate head groups. For n-alkyl carboxylates, linear chain type aggregates replace the trimeric units of Pd acetate. In solution, in the presence of amine, palladium salt aggregates disintegrate and the Pd complex is isolated and stabilized by amine molecules. Using bis(amine) palladium carboxylate adducts as precursors, palladium nanoparticles were fabricated. During high temperature thermolysis, the bis(amine) Pd carboxylate complex decomposes to form small sized Pd nanoparticles. Combining NMR techniques with FTIR spectroscopy, it was possible to follow an original stabilization mechanism. PdNPs are stabilized by weakly interacting long chain aliphatic amide and carboxylic acid derived from the palladium precursor.
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Affiliation(s)
- Joanna Zakrzewska
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland.
| | - Pawel Uznanski
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland.
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Daniel H, Poole J, Klein H, Huang C, Zakrzewska J. Cognitive Behavioral Therapy for Patients with Trigeminal Neuralgia: A Feasibility Study. J Oral Facial Pain Headache 2021; 35:30-34. [DOI: 10.11607/ofph.2664] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Rubinsztajn S, Mizerska U, Zakrzewska J, Uznanski P, Cypryk M, Fortuniak W. Effect of temperature on B(C 6F 5) 3-catalysed reduction of germanium alkoxides by hydrosilanes - a new route to germanium nanoparticles. Dalton Trans 2020; 49:7319-7323. [PMID: 32478766 DOI: 10.1039/d0dt01555e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Reduction of Ge(OBu)4 with PhMe2SiH catalyzed by B(C6F5)3 at ambient temperature leads to GeH4. We discovered that a higher temperature (above 100 °C) completely changes the reaction course by producing germanium nanoparticles (Ge NPs) in high yield. This process provides a simple one-pot method for Ge NPs synthesis from readily available substrates under mild conditions.
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Affiliation(s)
- Slawomir Rubinsztajn
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, Lodz, 90-363, Poland.
| | - Urszula Mizerska
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, Lodz, 90-363, Poland.
| | - Joanna Zakrzewska
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, Lodz, 90-363, Poland.
| | - Pawel Uznanski
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, Lodz, 90-363, Poland.
| | - Marek Cypryk
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, Lodz, 90-363, Poland.
| | - Witold Fortuniak
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, Lodz, 90-363, Poland.
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Uznanski P, Walkiewicz‐Pietrzykowska A, Jankowski K, Zakrzewska J, Wrobel AM, Balcerzak J, Tyczkowski J. Atomic Hydrogen Induced Chemical Vapor Deposition of Silicon Oxycarbide Thin Films Derived from Diethoxymethylsilane Precursor. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.5674] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Pawel Uznanski
- Polish Academy of Sciences Centre of Molecular and Macromolecular Studies Sienkiewicza 112 Lodz 90‐363 Poland
| | | | - Krzysztof Jankowski
- Polish Academy of Sciences Centre of Molecular and Macromolecular Studies Sienkiewicza 112 Lodz 90‐363 Poland
- Technical Department Jacob of Paradies University Chopina 52 Gorzow Wielkopolski 66‐400 Poland
| | - Joanna Zakrzewska
- Polish Academy of Sciences Centre of Molecular and Macromolecular Studies Sienkiewicza 112 Lodz 90‐363 Poland
| | - Aleksander M. Wrobel
- Polish Academy of Sciences Centre of Molecular and Macromolecular Studies Sienkiewicza 112 Lodz 90‐363 Poland
| | - Jacek Balcerzak
- Faculty of Process and Environmental Engineering, Department of Molecular Engineering Lodz University of Technology Wolczanska 213 Lodz 90‐924 Poland
| | - Jacek Tyczkowski
- Faculty of Process and Environmental Engineering, Department of Molecular Engineering Lodz University of Technology Wolczanska 213 Lodz 90‐924 Poland
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Zakrzewska J, Lj Mitrović A, Mutavdžić D, Dučić T, Radotić K. Phosphorus homeostasis in Populus alba L. under excess phosphate conditions, assessed by 31P nuclear magnetic resonance spectroscopy and X-ray microfluorescence. Environ Sci Pollut Res Int 2020; 27:3320-3328. [PMID: 31838696 DOI: 10.1007/s11356-019-07200-9] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Accepted: 11/27/2019] [Indexed: 06/10/2023]
Abstract
The phosphates (Pi) are nowadays recognized as pollutants. We studied the effect of Pi (0.625-12.500 mM KH2PO4) in the culture medium on in vitro grown 2-month-old Populus alba trees. The levels of sugar phosphates and vacuolar and cytoplasmic Pi in cell compartments of roots and stems were determined using 31P NMR, while tissue-specific micro- and macroelements mapping on stem cross-sections were performed using synchrotron-based X-ray microfluorescence. Plants grown on 0.625 mM Pi (MS/2 medium) showed a survival rate of 70%. With the increase in Pi concentrations up to 6.250 mM, plant growth and survival increased, without changes in total P content per mass or in the levels of cytoplasmic and vacuolar phosphates, in both stems and roots, while the levels of Fe, Cu, Zn, Ca and Mn in stems increased. Further increase in Pi to 9.375 and 12.500 mM in the medium resulted in inhibited growth comparable with plants grown on MS/2, with the increase in total P content per mass up to 50%, in both stems and roots, but with no changes in cytoplasmic and vacuolar phosphates; 12.500 mM Pi affected even plant survival (70%) and thus might be considered as mildly toxic. 31P NMR results indicate that the high tolerance of P. alba to increased Pi could result from its ability to maintain an intracellular P homeostasis, despite P accumulation up to 50%, in both stems and roots, indicating P. alba as a promising wood species for dendroremediation.
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Affiliation(s)
- Joanna Zakrzewska
- Institute of General and Physical Chemistry, Studentski trg 12/V, Belgrade, 11158, Serbia
| | - Aleksandra Lj Mitrović
- Institute for Multidisciplinary Research, University of Belgrade, Kneza Višeslava 1, Belgrade, 11000, Serbia
| | - Dragosav Mutavdžić
- Institute for Multidisciplinary Research, University of Belgrade, Kneza Višeslava 1, Belgrade, 11000, Serbia
| | - Tanja Dučić
- CELLS - ALBA, Carrer de la Llum 2-26, Cerdanyola del Valles, 08290, Barcelona, Spain
| | - Ksenija Radotić
- Institute for Multidisciplinary Research, University of Belgrade, Kneza Višeslava 1, Belgrade, 11000, Serbia.
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Awal D, Amin K, Venda-Nova C, Naqvi A, Zakrzewska J. The specialist management of non-temporomandibular orofacial pain: maxillofacial surgery’s known unknown? Br J Oral Maxillofac Surg 2019; 57:749-754. [DOI: 10.1016/j.bjoms.2019.06.024] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Accepted: 06/21/2019] [Indexed: 11/26/2022]
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Zakrzewska J, Padfield D, Ferguson A. Visual Imagery: A Tool to Explore the Impact of Burning Mouth Syndrome. J Oral Facial Pain Headache 2019; 33:e8-e14. [DOI: 10.11607/ofph.2095] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Žižić M, Zakrzewska J, Tešanović K, Bošković E, Nešović M, Karaman M. Effects of vanadate on the mycelium of edible fungus Coprinus comatus. J Trace Elem Med Biol 2018; 50:320-326. [PMID: 30262298 DOI: 10.1016/j.jtemb.2018.07.017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Revised: 07/12/2018] [Accepted: 07/20/2018] [Indexed: 10/28/2022]
Abstract
Vanadate is proposed to play a pivotal role in application of edible fungus Coprinus comatus for medical purposes. In this study the concentration of extracellular vanadate acceptable for the submerged cultivation of C. comatus mycelium was established. The mycelium could grow, and overcome vanadate toxic effects, up to the concentration of 3.3 mM. Moreover, in this condition, at the end of the exponential phase of growth, biomass yield was almost identical to that in the control. 31P NMR spectroscopy showed that addition of 10 mM vanadate to the mycelium in the exponential phase of growth provoked instantaneous increase of a sugar phosphates level which could be related to changes in activities of glycolytic enzymes. Exposure to higher vanadate concentration was toxic for the cell. 51V NMR measurements revealed that monomer of vanadate is present in the cytoplasm causing the metabolic changes. C. comatus has also capacity for vanadate reduction, as shown by EPR measurements, but vanadyl uptake is significantly less comparing to vanadate.
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Affiliation(s)
- Milan Žižić
- Department of Life Sciences, Institute for Multidisciplinary Research, University of Belgrade, Kneza Višeslava 1, 11030 Belgrade, Serbia.
| | - Joanna Zakrzewska
- Institute of General and Physical Chemistry, Studentski trg 12 11158 Belgrade, Serbia
| | - Kristina Tešanović
- Department of Physiology and Biophysics, Faculty of Biology, University of Belgrade, Studentski trg 16 11158 Belgrade, Serbia
| | - Eleonora Bošković
- Department of Biology and Ecology, Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovica 2, 21000 Novi Sad, Serbia
| | - Milica Nešović
- Institute of General and Physical Chemistry, Studentski trg 12 11158 Belgrade, Serbia
| | - Maja Karaman
- Department of Biology and Ecology, Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovica 2, 21000 Novi Sad, Serbia
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Bošnjaković-Pavlović N, Bajuk-Bogdanović D, Zakrzewska J, Yan Z, Holclajtner-Antunović I, Gillet JM, Spasojević-de Biré A. Reactivity of 12-tungstophosphoric acid and its inhibitor potency toward Na + /K + -ATPase: A combined 31 P NMR study, ab initio calculations and crystallographic analysis. J Inorg Biochem 2017; 176:90-99. [DOI: 10.1016/j.jinorgbio.2017.08.014] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2017] [Revised: 07/23/2017] [Accepted: 08/22/2017] [Indexed: 02/06/2023]
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Stanić M, Križak S, Jovanović M, Pajić T, Ćirić A, Žižić M, Zakrzewska J, Antić TC, Todorović N, Živić M. Growth inhibition of fungus Phycomyces blakesleeanus by anion channel inhibitors anthracene-9-carboxylic and niflumic acid attained through decrease in cellular respiration and energy metabolites. Microbiology (Reading) 2017; 163:364-372. [PMID: 28100310 DOI: 10.1099/mic.0.000429] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Increasing resistance of fungal strains to known fungicides has prompted identification of new candidates for fungicides among substances previously used for other purposes. We have tested the effects of known anion channel inhibitors anthracene-9-carboxylic acid (A9C) and niflumic acid (NFA) on growth, energy metabolism and anionic current of mycelium of fungus Phycomyces blakesleeanus. Both inhibitors significantly decreased growth and respiration of mycelium, but complete inhibition was only achieved by 100 and 500 µM NFA for growth and respiration, respectively. A9C had no effect on respiration of human NCI-H460 cell line and very little effect on cucumber root sprout clippings, which nominates this inhibitor for further investigation as a potential new fungicide. Effects of A9C and NFA on respiration of isolated mitochondria of P. blakesleeanus were significantly smaller, which indicates that their inhibitory effect on respiration of mycelium is indirect. NMR spectroscopy showed that both A9C and NFA decrease the levels of ATP and polyphosphates in the mycelium of P. blakesleeanus, but only A9C caused intracellular acidification. Outwardly rectifying, fast inactivating instantaneous anionic current (ORIC) was also reduced to 33±5 and 21±3 % of its pre-treatment size by A9C and NFA, respectively, but only in the absence of ATP. It can be assumed from our results that the regulation of ORIC is tightly linked to cellular energy metabolism in P. blakesleeanus, and the decrease in ATP and polyphosphate levels could be a direct cause of growth inhibition.
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Affiliation(s)
- Marina Stanić
- Institute for Multidisciplinary Research, University of Belgrade, Kneza Višeslava 1, 11030 Belgrade, Serbia
| | - Strahinja Križak
- Institute for Multidisciplinary Research, University of Belgrade, Kneza Višeslava 1, 11030 Belgrade, Serbia
| | - Mirna Jovanović
- Institute for Biological Research 'Siniša Stanković', University of Belgrade, Bulevar despota Stefana 142, 11060 Belgrade, Serbia
| | - Tanja Pajić
- Institute for Multidisciplinary Research, University of Belgrade, Kneza Višeslava 1, 11030 Belgrade, Serbia
| | - Ana Ćirić
- Institute for Biological Research 'Siniša Stanković', University of Belgrade, Bulevar despota Stefana 142, 11060 Belgrade, Serbia
| | - Milan Žižić
- Institute for Multidisciplinary Research, University of Belgrade, Kneza Višeslava 1, 11030 Belgrade, Serbia
| | - Joanna Zakrzewska
- Institute of General and Physical Chemistry, Studentski trg 12-16, 11000 Belgrade, Serbia
| | - Tijana Cvetić Antić
- Faculty of Biology, University of Belgrade, Studentski trg 16, 11000 Belgrade, Serbia
| | - Nataša Todorović
- Institute for Biological Research 'Siniša Stanković', University of Belgrade, Bulevar despota Stefana 142, 11060 Belgrade, Serbia
| | - Miroslav Živić
- Faculty of Biology, University of Belgrade, Studentski trg 16, 11000 Belgrade, Serbia
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Uznanski P, Zakrzewska J, Favier F, Kazmierski S, Bryszewska E. Synthesis and characterization of silver nanoparticles from (bis)alkylamine silver carboxylate precursors. J Nanopart Res 2017; 19:121. [PMID: 28435390 PMCID: PMC5364236 DOI: 10.1007/s11051-017-3827-5] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2016] [Accepted: 03/09/2017] [Indexed: 05/31/2023]
Abstract
A comparative study of amine and silver carboxylate adducts [R1COOAg-2(R2NH2)] (R1 = 1, 7, 11; R2 = 8, 12) as a key intermediate in NPs synthesis is carried out via differential scanning calorimetry, solid-state FT-infrared spectroscopy, 13C CP MAS NMR, powder X-ray diffraction and X-ray photoelectron spectroscopy, and various solution NMR spectroscopies (1H and 13C NMR, pulsed field gradient spin-echo NMR, and ROESY). It is proposed that carboxyl moieties in the presence of amine ligands are bound to silver ions via chelating bidentate type of coordination as opposed to bridging bidentate coordination of pure silver carboxylates resulting from the formation of dimeric units. All complexes are packed as lamellar bilayer structures. Silver carboxylate/amine complexes show one first-order melting transition. The evidence presented in this study shows that phase behavior of monovalent metal carboxylates are controlled, mainly, by head group bonding. In solution, insoluble silver salt is stabilized by amine molecules which exist in dynamic equilibrium. Using (bis)amine-silver carboxylate complex as precursor, silver nanoparticles were fabricated. During high-temperature thermolysis, the (bis)amine-carboxylate adduct decomposes to produce silver nanoparticles of small size. NPs are stabilized by strongly interacting carboxylate and trace amounts of amine derived from the silver precursor interacting with carboxylic acid. A corresponding aliphatic amide obtained from silver precursor at high-temperature reaction conditions is not taking part in the stabilization. Combining NMR techniques with FTIR, it was possible to follow an original stabilization mechanism. Graphical abstractThe synthesis of a series (bis)alkylamine silver(I) carboxylate complexes in nonpolar solvents were carried out and fully characterized both in the solid and solution. Carboxyl moieties in the presence of amine ligands are bound to silver ions via chelating bidentate type of coordination. The complexes form layered structures which thermally decompose forming nanoparticles stabilized only by aliphatic carboxylates.
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Affiliation(s)
- Pawel Uznanski
- Centre of Molecular and Macromolecular Studies, PAS, Sienkiewicza 112, 90-363 Lodz, Poland
| | - Joanna Zakrzewska
- Centre of Molecular and Macromolecular Studies, PAS, Sienkiewicza 112, 90-363 Lodz, Poland
| | - Frederic Favier
- ICGM - UMR5253- Equipe AIME, Université Montpellier II, 2 Place Eugène Bataillon - CC 1502, 34095 CEDEX 5 Montpellier, France
| | - Slawomir Kazmierski
- Centre of Molecular and Macromolecular Studies, PAS, Sienkiewicza 112, 90-363 Lodz, Poland
| | - Ewa Bryszewska
- Centre of Molecular and Macromolecular Studies, PAS, Sienkiewicza 112, 90-363 Lodz, Poland
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Hadžibrahimović M, Sužnjević D, Pastor F, Cvetić Antić T, Žižić M, Zakrzewska J, Živić M. The interactions of vanadate monomer with the mycelium of fungus Phycomyces blakesleeanus: reduction or uptake? Antonie Van Leeuwenhoek 2016; 110:365-373. [PMID: 27896685 DOI: 10.1007/s10482-016-0808-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2016] [Accepted: 11/21/2016] [Indexed: 11/26/2022]
Abstract
The possibility of reduction of vanadate monomer in the mycelium of fungus Phycomyces blakesleeanus was investigated in this study by means of polarography. Control experiments were performed with vanadyl [V(IV)] and vanadate [V(V)] in 10 mM Hepes, pH 7.2. Addition of P. blakesleeanus mycelium resulted in disappearance of all V(IV) polarographic waves recorded in the control. This points to the uptake of all available V(IV) by the mycelium, up to 185 µmol/gFW, and suggests P. blakesleeanus as a potential agent in V(IV) bioremediation. Polarographic measurements of mycelium with low concentrations (0.1-1 mM) of V(V), that only allows the presence of monomer, showed that fungal mycelia removes around 27% of V(V) from the extracellular solution. Uptake was saturated at 104 ± 2 µmol/gFW which indicates excellent bioaccumulation capability of P. blakesleeanus. EPR, 51V NMR and polarographic experiments showed no indications of any measurable extracellular complexation of V(V) monomer with fungal exudates, reduction by the mycelium or adsorption to the cell wall. Therefore, in contrast to vanadium oligomers, vanadate monomer interactions with the mycelium are restricted to its transport into the fungal cell, probably by a phosphate transporter.
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Affiliation(s)
- Mirzeta Hadžibrahimović
- Department of Biomedical Sciences, State University of Novi Pazar, Vuka Karadžića bb, 36300, Novi Pazar, Serbia
| | - Desanka Sužnjević
- Institute of General and Physical Chemistry, Studentski trg 12-16, 11000, Belgrade, Serbia
| | - Ferenc Pastor
- Faculty of Chemistry, University of Belgrade, Studentski trg 12-16, 11000, Belgrade, Serbia
| | - Tijana Cvetić Antić
- University of Belgrade-Faculty of Biology, Studentski trg 16, 11000, Belgrade, Serbia
| | - Milan Žižić
- Department of Life Sciences, Institute for Multidisciplinary Research, University of Belgrade, Kneza Višeslava 1, 11030, Belgrade, Serbia
| | - Joanna Zakrzewska
- Institute of General and Physical Chemistry, Studentski trg 12-16, 11000, Belgrade, Serbia
| | - Miroslav Živić
- University of Belgrade-Faculty of Biology, Studentski trg 16, 11000, Belgrade, Serbia.
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Zakrzewska J, Buchanan JAG. Burning mouth syndrome. BMJ Clin Evid 2016; 2016:1301. [PMID: 26745781 PMCID: PMC4704679] [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: 06/05/2023]
Abstract
INTRODUCTION Burning mouth syndrome mainly affects women, particularly after the menopause, when its prevalence may be 18% to 33%. METHODS AND OUTCOMES We conducted a systematic overview, aiming to answer the following clinical question: What are the effects of selected treatments for burning mouth syndrome? We searched: Medline, Embase, The Cochrane Library, and other important databases up to January 2015 (Clinical Evidence overviews are updated periodically; please check our website for the most up-to-date version of this overview). RESULTS At this update, searching of electronic databases retrieved 70 studies. After deduplication and removal of conference abstracts, 45 records were screened for inclusion in the overview. Appraisal of titles and abstracts led to the exclusion of 25 studies and the further review of 20 full publications. Of the 20 full articles evaluated, one systematic review and nine RCTs were added at this update. We performed a GRADE evaluation for five PICO combinations. CONCLUSIONS In this systematic overview, we categorised the efficacy for six interventions based on information about the effectiveness and safety of alphalipoic acid, benzodiazepines, benzydamine hydrochloride, cognitive behavioural therapy (CBT), selective serotonin re-uptake inhibitors (SSRIs), and tricyclic antidepressants.
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Affiliation(s)
- Joanna Zakrzewska
- Division of Diagnostic, Surgical and Medical Sciences, Eastman Dental Hospital, UCLH NHS Foundation, London, UK
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18
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Žižić M, Dučić T, Grolimund D, Bajuk-Bogdanović D, Nikolic M, Stanić M, Križak S, Zakrzewska J. X-ray absorption near-edge structure micro-spectroscopy study of vanadium speciation in Phycomyces blakesleeanus mycelium. Anal Bioanal Chem 2015; 407:7487-96. [DOI: 10.1007/s00216-015-8916-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2015] [Revised: 07/08/2015] [Accepted: 07/13/2015] [Indexed: 10/24/2022]
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Križak S, Nikolić L, Stanić M, Žižić M, Zakrzewska J, Živić M, Todorović N. Osmotic swelling activates a novel anionic current with VRAC-like properties in a cytoplasmic droplet membrane from Phycomyces blakesleeanus sporangiophores. Res Microbiol 2015; 166:162-73. [DOI: 10.1016/j.resmic.2015.02.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2014] [Revised: 02/05/2015] [Accepted: 02/07/2015] [Indexed: 02/05/2023]
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Cregg R, Besi E, Boniface D, Zakrzewska J. EHMTI-0355. Comparison of carbamazepine and oxcarbazepine tolerability in patients with trigeminal neuralgia. J Headache Pain 2014. [PMCID: PMC4182151 DOI: 10.1186/1129-2377-15-s1-i2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Žižić M, Živić M, Maksimović V, Stanić M, Križak S, Antić TC, Zakrzewska J. Vanadate influence on metabolism of sugar phosphates in fungus Phycomyces blakesleeanus. PLoS One 2014; 9:e102849. [PMID: 25036378 PMCID: PMC4103890 DOI: 10.1371/journal.pone.0102849] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2014] [Accepted: 06/24/2014] [Indexed: 11/19/2022] Open
Abstract
The biological and chemical basis of vanadium action in fungi is relatively poorly understood. In the present study, we investigate the influence of vanadate (V5+) on phosphate metabolism of Phycomyces blakesleeanus. Addition of V5+ caused increase of sugar phosphates signal intensities in 31P NMR spectra in vivo. HPLC analysis of mycelial phosphate extracts demonstrated increased concentrations of glucose 6 phosphate, fructose 6 phosphate, fructose 1, 6 phosphate and glucose 1 phosphate after V5+ treatment. Influence of V5+ on the levels of fructose 2, 6 phosphate, glucosamine 6 phosphate and glucose 1, 6 phosphate (HPLC), and polyphosphates, UDPG and ATP (31P NMR) was also established. Increase of sugar phosphates content was not observed after addition of vanadyl (V4+), indicating that only vanadate influences its metabolism. Obtained results from in vivo experiments indicate catalytic/inhibitory vanadate action on enzymes involved in reactions of glycolysis and glycogenesis i.e., phosphoglucomutase, phosphofructokinase and glycogen phosphorylase in filamentous fungi.
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Affiliation(s)
- Milan Žižić
- Institute for Multidisciplinary Research, Department of Life Sciences, University of Belgrade, Belgrade, Serbia
| | - Miroslav Živić
- University of Belgrade-Faculty of Biology, Department of Physiology and Biophysics, Belgrade, Serbia
| | - Vuk Maksimović
- Institute for Multidisciplinary Research, Department of Life Sciences, University of Belgrade, Belgrade, Serbia
| | - Marina Stanić
- Institute for Multidisciplinary Research, Department of Life Sciences, University of Belgrade, Belgrade, Serbia
| | - Strahinja Križak
- Institute for Multidisciplinary Research, Department of Life Sciences, University of Belgrade, Belgrade, Serbia
| | - Tijana Cvetić Antić
- University of Belgrade-Faculty of Biology, Department of Physiology and Biophysics, Belgrade, Serbia
| | - Joanna Zakrzewska
- Institute of General and Physical Chemistry, NMR Laboratory, Belgrade, Serbia
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Schiffman E, Ohrbach R, Truelove E, Look J, Anderson G, Goulet JP, List T, Svensson P, Gonzalez Y, Lobbezoo F, Michelotti A, Brooks SL, Ceusters W, Drangsholt M, Ettlin D, Gaul C, Goldberg LJ, Haythornthwaite JA, Hollender L, Jensen R, John MT, De Laat A, de Leeuw R, Maixner W, van der Meulen M, Murray GM, Nixdorf DR, Palla S, Petersson A, Pionchon P, Smith B, Visscher CM, Zakrzewska J, Dworkin SF. Diagnostic Criteria for Temporomandibular Disorders (DC/TMD) for Clinical and Research Applications: recommendations of the International RDC/TMD Consortium Network* and Orofacial Pain Special Interest Group†. J Oral Facial Pain Headache 2014; 28:6-27. [PMID: 24482784 DOI: 10.11607/jop.1151] [Citation(s) in RCA: 1996] [Impact Index Per Article: 199.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
AIMS The original Research Diagnostic Criteria for Temporomandibular Disorders (RDC/TMD) Axis I diagnostic algorithms have been demonstrated to be reliable. However, the Validation Project determined that the RDC/TMD Axis I validity was below the target sensitivity of ≥ 0.70 and specificity of ≥ 0.95. Consequently, these empirical results supported the development of revised RDC/TMD Axis I diagnostic algorithms that were subsequently demonstrated to be valid for the most common pain-related TMD and for one temporomandibular joint (TMJ) intra-articular disorder. The original RDC/TMD Axis II instruments were shown to be both reliable and valid. Working from these findings and revisions, two international consensus workshops were convened, from which recommendations were obtained for the finalization of new Axis I diagnostic algorithms and new Axis II instruments. METHODS Through a series of workshops and symposia, a panel of clinical and basic science pain experts modified the revised RDC/TMD Axis I algorithms by using comprehensive searches of published TMD diagnostic literature followed by review and consensus via a formal structured process. The panel's recommendations for further revision of the Axis I diagnostic algorithms were assessed for validity by using the Validation Project's data set, and for reliability by using newly collected data from the ongoing TMJ Impact Project-the follow-up study to the Validation Project. New Axis II instruments were identified through a comprehensive search of the literature providing valid instruments that, relative to the RDC/TMD, are shorter in length, are available in the public domain, and currently are being used in medical settings. RESULTS The newly recommended Diagnostic Criteria for TMD (DC/TMD) Axis I protocol includes both a valid screener for detecting any pain-related TMD as well as valid diagnostic criteria for differentiating the most common pain-related TMD (sensitivity ≥ 0.86, specificity ≥ 0.98) and for one intra-articular disorder (sensitivity of 0.80 and specificity of 0.97). Diagnostic criteria for other common intra-articular disorders lack adequate validity for clinical diagnoses but can be used for screening purposes. Inter-examiner reliability for the clinical assessment associated with the validated DC/TMD criteria for pain-related TMD is excellent (kappa ≥ 0.85). Finally, a comprehensive classification system that includes both the common and less common TMD is also presented. The Axis II protocol retains selected original RDC/TMD screening instruments augmented with new instruments to assess jaw function as well as behavioral and additional psychosocial factors. The Axis II protocol is divided into screening and comprehensive self report instrument sets. The screening instruments' 41 questions assess pain intensity, pain-related disability, psychological distress, jaw functional limitations, and parafunctional behaviors, and a pain drawing is used to assess locations of pain. The comprehensive instruments, composed of 81 questions, assess in further detail jaw functional limitations and psychological distress as well as additional constructs of anxiety and presence of comorbid pain conditions. CONCLUSION The recommended evidence-based new DC/TMD protocol is appropriate for use in both clinical and research settings. More comprehensive instruments augment short and simple screening instruments for Axis I and Axis II. These validated instruments allow for identification of patients with a range of simple to complex TMD presentations.
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Stanić M, Zakrzewska J, Hadžibrahimović M, Zižić M, Marković Z, Vučinić Z, Zivić M. Oxygen regulation of alternative respiration in fungus Phycomyces blakesleeanus: connection with phosphate metabolism. Res Microbiol 2013; 164:770-8. [PMID: 23542427 DOI: 10.1016/j.resmic.2013.03.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2012] [Accepted: 03/11/2013] [Indexed: 11/27/2022]
Abstract
Environmental changes can often result in oxygen deficiency which influences cellular energy metabolism, but such effects have been insufficiently studied in fungi. The effects of oxygen deprivation on respiration and phosphate metabolites in Phycomyces blakesleeanus were investigated by oxygen electrode and (31)P NMR spectroscopy. Mycelium was incubated in hypoxic and anoxic conditions for 1.5, 3 and 5 h and then reoxygenated. Participation of alternative oxidase (AOX) in total respiration increased gradually in both treatments and after 5 h of anoxia exceeded a value 50% higher than in control. Shortly after reintroduction of oxygen into the system AOX level decreased close to the control level. Oxygen deprivation also caused a reversible decrease of polyphosphate/inorganic phosphate ratio (PPc/Pi), which was strongly correlated with the increase of AOX participation in total respiration. Unexpectedly, ATP content remained almost constant, probably due to the ability of PolyP to sustain energy and phosphate homeostasis of the cell under stress conditions. This was further substantiated by the effects of azide, a cytochrome c oxidase inhibitor, which also decreased PPc/Pi ratio, but to a smaller extent in oxygen deprived than control and reoxygenated specimens.
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Affiliation(s)
- Marina Stanić
- Department of Life Sciences, Institute for Multidisciplinary Research, University of Belgrade, Kneza Višeslava 1, 11030 Belgrade, Serbia.
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Žižić M, Živić M, Spasojević I, Bogdanović Pristov J, Stanić M, Cvetić-Antić T, Zakrzewska J. The interactions of vanadium with Phycomyces blakesleeanus mycelium: enzymatic reduction, transport and metabolic effects. Res Microbiol 2012; 164:61-9. [PMID: 22992386 DOI: 10.1016/j.resmic.2012.08.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2012] [Accepted: 08/21/2012] [Indexed: 10/27/2022]
Abstract
The biological and chemical basis of vanadium action and transport in fungi is relatively poorly understood. In this study we investigated the interactions of vanadium in physiologically-relevant redox states: vanadate (+5) and vanadyl (+4), with mycelium of fungus Phycomyces blakesleeanus using EPR and (31)P NMR spectroscopy and biochemical assays. We determined that P. blakesleeanus reduces V(5+) to V(4+) in the extracellular compartment by the means of cell surface enzyme with ferricyanide reductase activity, which contains molybdenum-molybdopterin as a cofactor. Both, V(5+) and V(4+) bind to cell wall. They enter the cytoplasm via phosphate transporter and cation channels, respectively, and exhibit different metabolic effects. Vanadate provokes increased biomass production, the effects being inverted to toxic at higher V(5+) concentrations. In addition, V(5+) activates the synthesis of sugar phosphates and oligophosphates. On the other hand, V(4+) exhibits toxic effects even at low concentrations. The V(4+) detoxification route involves binding to vacuolar polyphosphates. Altogether our results imply that the mechanism of interaction of vanadium with P. blakesleeanus involves three major steps: extracellular enzymatic V(5+)/V(4+) reduction, V(4+) influx, and vacuolar storage, with an additional step - V(5+) import occurring at higher vanadate concentrations.
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Affiliation(s)
- Milan Žižić
- Department of Life Sciences, Institute for Multidisciplinary Research, University of Belgrade, Kneza Višeslava 1, 11030 Belgrade, Serbia.
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25
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Nikolić L, Todorović N, Zakrzewska J, Stanić M, Rauš S, Kalauzi A, Janać B. Involvement of Na+/K+ pump in fine modulation of bursting activity of the snail Br neuron by 10 mT static magnetic field. J Comp Physiol A Neuroethol Sens Neural Behav Physiol 2012; 198:525-40. [PMID: 22534773 DOI: 10.1007/s00359-012-0727-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2012] [Revised: 04/06/2012] [Accepted: 04/07/2012] [Indexed: 01/17/2023]
Abstract
The spontaneously active Br neuron from the brain-subesophageal ganglion complex of the garden snail Helix pomatia rhythmically generates regular bursts of action potentials with quiescent intervals accompanied by slow oscillations of membrane potential. We examined the involvement of the Na(+)/K(+) pump in modulating its bursting activity by applying a static magnetic field. Whole snail brains and Br neuron were exposed to the 10-mT static magnetic field for 15 min. Biochemical data showed that Na(+)/K(+)-ATPase activity increased almost twofold after exposure of snail brains to the static magnetic field. Similarly, (31)P NMR data revealed a trend of increasing ATP consumption and increase in intracellular pH mediated by the Na(+)/H(+) exchanger in snail brains exposed to the static magnetic field. Importantly, current clamp recordings from the Br neuron confirmed the increase in activity of the Na(+)/K(+) pump after exposure to the static magnetic field, as the magnitude of ouabain's effect measured on the membrane resting potential, action potential, and interspike interval duration was higher in neurons exposed to the magnetic field. Metabolic pathways through which the magnetic field influenced the Na(+)/K(+) pump could involve phosphorylation and dephosphorylation, as blocking these processes abolished the effect of the static magnetic field.
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Affiliation(s)
- Ljiljana Nikolić
- Department of Neurophysiology, Institute for Biological Research Siniša Stanković, University of Belgrade, Bulevar Despota Stefana 142, Belgrade, Serbia.
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Benoliel R, Svensson P, Heir GM, Sirois D, Zakrzewska J, Oke-Nwosu J, Torres SR, Greenberg MS, Klasser GD, Katz J, Eliav E. Persistent orofacial muscle pain. Oral Dis 2011; 17 Suppl 1:23-41. [PMID: 21382137 DOI: 10.1111/j.1601-0825.2011.01790.x] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The pathophysiology of persistent orofacial myalgia has been the centre of much controversy. In this article we suggest a novel descriptive term; 'persistent orofacial muscle pain' (POMP) and review current evidence that supports the hypothesis that the induction of POMP involves the interplay between a peripheral nociceptive source in muscle, a faulty central nervous system component and decreased coping ability. In this context it is widely accepted that a complex interaction of variable intrinsic and extrinsic factors act to induce POMP and dysfunction.
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Affiliation(s)
- R Benoliel
- Department of Oral Medicine, The Faculty of Dentistry, Hebrew University-Hadassah, Jerusalem, Israel.
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Djurdjevic P, Cvijovic M, Zakrzewska J. Aluminium(III) complexes of S-histidine: synthesis, characterization and potentiometric and spectroscopic study of solution equilibria. J COORD CHEM 2011. [DOI: 10.1080/00958970500258807] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Predrag Djurdjevic
- a Faculty of Science , Institute of Chemistry , 34000 Kragujevac, State Union of Serbia and MontenegroP.O. Box 60
| | - Mirjana Cvijovic
- b The Copper Mill , Sevojno , 31000 Uzice, State Union of Serbia and Montenegro
| | - Joanna Zakrzewska
- c Institute of General and Physical Chemistry , 11000 Belgrade, State Union of Serbia and Montenegro
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Bajić A, Zakrzewska J, Godjevac D, Andjus P, Jones DR, Spasić M, Spasojević I. Relevance of the ability of fructose 1,6-bis(phosphate) to sequester ferrous but not ferric ions. Carbohydr Res 2010; 346:416-20. [PMID: 21232735 DOI: 10.1016/j.carres.2010.12.008] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2010] [Revised: 12/06/2010] [Accepted: 12/08/2010] [Indexed: 12/27/2022]
Abstract
The cytoprotective activity of F16BP has been documented in severe conditions such as convulsions, reperfusion injury, septic shock, diabetic complications, hypothermia-induced injury, UV-provoked skin damage and in other processes including apoptosis and excitotoxicity. F16BP shows very efficient cytoprotective activity in astroglial cells exposed to H(2)O(2)-provoked oxidative stress and during neuronal injury caused by hypoxic conditions. As most of the aforementioned processes involve iron activity-related conditions, we investigated the ferric and ferrous iron binding properties of F16BP under physiological conditions using (31)P NMR and EPR spectroscopy. Our results indicate that cytoprotective F16BP activity is predominantly based on ferrous iron sequestration. (31)P NMR spectroscopy of F16BP employing paramagnetic properties of iron clearly showed that F16BP forms stabile complexes with Fe(2+) which was verified by EPR of another divalent cation-Mn(2+). On the other hand, F16BP does not sequester ferric iron nor does it increase its redox activity as shown by (31)P NMR and EPR spin-trapping. Therefore, F16BP may be beneficial in neurodegenerative and other conditions that are characterised by ferric iron stores and deposits.
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Affiliation(s)
- Aleksandar Bajić
- Center for Laser Microscopy, Faculty of Biology, University of Belgrade, Serbia
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Miladinović Z, Zakrzewska J, Dondur V. Kinetic analysis of experimental intensity curves obtained during zeolite a synthesis using in situ 27Al NMR spectroscopy. Russ J Phys Chem 2009. [DOI: 10.1134/s0036024409090118] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Szumowski Ł, Przybylski A, Maciag A, Derejko P, Bodalski R, Zakrzewska J, Orczykowski M, Szufladowicz E, Szwed H, Walczak F. Outcomes of a single centre registry of patients with ischaemic heart disease, qualified for an RF ablation of ventricular arrhythmia after ICD intervention. Kardiol Pol 2009; 67:123-129. [PMID: 19288374] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
BACKGROUND AND AIM Reduction of ICD interventions improves the quality of life and possibly reduces mortality. Ablation reduces ICD interventions in patients with ablatable arrhythmia, but its effectiveness needs to be proven for patients with coronary artery disease (CAD) regardless of the type of arrhythmia. Our study was designed to address this issue, but it had to be terminated due to recruitment problems. The reasons for early termination are described in this paper. METHODS Patients with CAD and implanted ICD, who within the past three months survived an episode of VT/VF, were selected for this study. Patients were to be randomised for ablation or pharmacotherapy. A group of 209 patients was screened between June and December of 2007. RESULTS Out of 209 patients, 39 (18.7%) had appropriate ICD therapy during the last three months and were potentially eligible for the trial. Out of 39 patients, 34 could not be randomised, due to the presence of exclusion criteria (n-25) or consent refusal (n-9). Previous ablation (n-10), left ventricular thrombus (n-3) or presence of mitral or aortic artificial valve (n-3) were the most frequent exclusion criteria. During follow-up of 12 months one patient required ablation due to frequent ICD discharges. From the five randomised patients, two were randomised to ablation and three to the pharmacotherapy arm. CONCLUSIONS 1. Ablation might not be suitable as a routine treatment for all patients with ICD interventions, as a significant group prefers not to undergo RF ablation as a routine treatment or there are contraindications for the ablation. 2. There are obstacles in prospective and randomised evaluation of the role of ablation in patients with CAD and ICD interventions, which are related both to patients' medical conditions and to patients' will. These limitations should be taken into account when designing further studies.
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Živić M, Zakrzewska J, Stanić M, Cvetić T, Živanović B. Alternative respiration of fungus Phycomyces blakesleeanus. Antonie van Leeuwenhoek 2009; 95:207-17. [DOI: 10.1007/s10482-008-9304-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2008] [Accepted: 12/22/2008] [Indexed: 10/21/2022]
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Szumowski L, Głowniak A, Zakrzewska J, Derejko P, Szufladowicz E, Bodalski R, Orczykowski M, Przybylski A, Kepski R, Duda B, Michałek P, Jezierski J, Walczak F. [Pseudo atypical atrial flutter or atrial tachycardia dependent on complex substrate in a patient with univentricular heart after palliative operations - mapping and ablation]. Kardiol Pol 2009; 67:95-100. [PMID: 19253199] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We describe a case of persistent atrial tachycardia/flutter in a 19-year old female with corrected transposition of great arteries (ccTGA) and dual inlet left ventricle (DILV), treated with surgical palliative operations. The arrhythmia became persistent and symptomatic with dyspnea and severe cyanosis. During the EP study, the right atrial isthmus-dependent reentry was identified. In electroanatomical maps large areas of low voltage and electrical silence were localised. Due to these areas of slow conduction the isthmus dependent arrhythmia had long CL. Linear RF applications closed the isthmus, resulting in flutter termination. During 3 months of follow-up the patient remained free of arrhythmia.
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Spasojević I, Jelić S, Zakrzewska J, Bačić G. Decreased oxygen transfer capacity of erythrocytes as a cause of 5-fluorouracil related ischemia. Molecules 2008; 14:53-67. [PMID: 19127237 PMCID: PMC6253945 DOI: 10.3390/molecules14010053] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2008] [Revised: 12/21/2008] [Accepted: 12/24/2008] [Indexed: 12/19/2022] Open
Abstract
Various mechanisms have been proposed to account for chemotherapy related ischemia, but none of them can explain the available clinical data. In order to explore the possibility that the decreased ability of erythrocytes to deliver oxygen to the heart could be responsible for cardiotoxicity, we have performed an ex vivo and in vivo study of the effects of cisplatin/5-FU on erythrocytes, using a variety of biophysical techniques. Combining EPR and microscopy it was concluded that both cardiotoxic 5-FU and non-cardiotoxic cisplatin have similar effects on the erythrocyte membrane, thus eliminating those changes as a potential source of cardiotoxicity. On the contrary, 31P-NMR and polarography showed that the effects of these cytostatics on the intracellular milieu differ significantly. 5-FU provoked a pronounced decrease of the O2 level in blood and affected the metabolism of phosphate compounds, while cisplatin had no such effects. When combined these two drugs showed synergistic effects, which matches the higher frequency of cardiotoxicity of the combination relative to the sole application of 5-FU. Preliminary results acquired on blood of patients receiving cisplatin/5-FU therapy verified observations obtained ex vivo. These results open a possibility of applying NMR in preclinical trials of new drugs in order to predict their ischemic potential.
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Affiliation(s)
- Ivan Spasojević
- Author to whom correspondence is addressed; E-mail: ; Tel: +38 1112630796; Fax: +38 1112187133
| | - Svetislav Jelić
- Institute for Multidisciplinary Research, University of Belgrade, Kneza Višeslava 1, Belgrade, 11000, Serbia; E-Mail:
| | - Joanna Zakrzewska
- National Cancer Research Institute, Pasterova 14, Belgrade, 11000, Serbia; E-mail:
| | - Goran Bačić
- Insitute of General and Physical Chemistry, Studentski trg 12-16, Belgrade, 11000, Serbia; E-mail:
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Zakrzewska J, Derejko P, Szufladowicz E, Bodalski R, Orczykowski M, Przybylski A, Szumowski L, Michałek P, Walczak F. [Radiofrequency ablation of long standing persistent atrial fibrillation and post-incisional macroreentrant right atrial tachycardia in patient with advanced biventricular heart failure--case raport]. Kardiol Pol 2008; 66:1233-1238. [PMID: 19105105] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We present a case of a 54 year old male with a long-standing atrial fibrillation (AF) who was scheduled for cardiac transplantation due to the progression of heart failure. Previous treatment included pacemaker implantation, mitral valvuloplasty, a-v node modification using RF ablation, and pharmacological therapy. This time the patient underwent complex AF ablation which consisted of pulmonary vein isolation, mitral and left atrial roof line creation, cavo-tricuspid isthmus ablation and ablation of complex fractionated atrial electrograms, which resulted in restoration of sinus rhythm. Because of the right atrial post-incisional tachycardia the patient underwent second ablation session. This complex invasive approach occurred successful. The patient remains in sinus rhythm with improved left ventricular function and better NYHA class over a 12-month follow-up.
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Holclajtner-Antunović I, Bajuk-Bogdanović D, Todorović M, Mioč UB, Zakrzewska J, Uskoković-Marković S. Sectroscopic study of stability and molecular species of 12-tungstophosphoric acid in aqueous solution. CAN J CHEM 2008. [DOI: 10.1139/v08-138] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The various molecular species of 12-tungstophosporic acid (WPA) in aqueous solutions of different pH values (from 1 to 11.5) were investigated by UV, IR, and NMR spectroscopy. The dependence of the attained equilibrium composition in solution on time, concentration of WPA, and type of buffer used was studied. Obtained results indicate that the buffer type and pH value greatly determine the equilibrium composition in the solution. The Keggin structure of the WPA is sustained only up to pH 1.5. With further increase in pH, the decomposition of Keggin anion does not lead directly to the monovacant lacunary anion. Between 1.5 and 2.0, the structures with 2 phosphorus atoms from the Dawson series are dominant as intermediate species. In the pH range 3.5–7.5, WPA is present in the form of the monovacant lacunary Keggin anion. These results are of special importance for the biomedical and catalytic applications of heteropoly compounds (HPCs) and for an improved understanding of the mechanism of their functioning.Key words: heteropolyacids of the Keggin structure, hydrostability, UV, IR and NMR spectroscopy.
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Szumowski Ł, Głowniak A, Urbanek P, Karcz M, Banaszewski M, Derejko P, Przybylski A, Zakrzewska J, Ruzyłło W, Walczak F. [Successful RF ablation of permanent VT in a patient with acute coronary syndrome treated by complex angioplasty and stent implantation]. Kardiol Pol 2008; 66:701-704. [PMID: 18626843] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
We describe a case of a 59-year-old male with permanent VT in the course of an acute coronary syndrome. Coronary angiography revealed acute occlusion of the right coronary artery. Although the underlying condition was treated by implantation of 4 stents with excellent haemodynamic effect (TIMI 3), the tachycardia continued, being refractory to drugs (amiodarone). The attempts to restore sinus rhythm by DC electrical cardioversion or transvenous pacing were unsuccessful. The patient was referred to the EP lab. A critical isthmus localised at the paraseptal region of the LV and parallel to the mitral annulus was identified. The isthmus was closed by linear RF application, resulting in VT termination. Due to impaired LV ejection fraction (<30%) the patient was scheduled for ICD implantation. During 6-week follow-up the patient remained free of arrhythmia.
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Buchanan J, Zakrzewska J. Burning mouth syndrome. BMJ Clin Evid 2008; 2008:1301. [PMID: 19450321 PMCID: PMC2907957] [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: 05/27/2023]
Abstract
INTRODUCTION Burning mouth syndrome mainly affects women, particularly after the menopause, when its prevalence may be 18-33%. METHODS AND OUTCOMES We conducted a systematic review and aimed to answer the following clinical question: What are the effects of treatments for burning mouth syndrome? We searched: Medline, Embase, The Cochrane Library, and other important databases up to February 2007 (Clinical Evidence reviews are updated periodically, please check our website for the most up-to-date version of this review). We included harms alerts from relevant organisations such as the US Food and Drug Administration (FDA) and the UK Medicines and Healthcare products Regulatory Agency (MHRA). RESULTS We found 12 systematic reviews, RCTs, or observational studies that met our inclusion criteria. We performed a GRADE evaluation of the quality of evidence for interventions. CONCLUSIONS In this systematic review we present information relating to the effectiveness and safety of the following interventions: anaesthetics (local), antidepressants, benzodiazepines (topical clonazepam), benzydamine hydrochloride, cognitive behavioural therapy (CBT), dietary supplements, and hormone replacement therapy (HRT) in postmenopausal women.
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Affiliation(s)
- John Buchanan
- Barts and The London School of Medicine and Dentistry, Dental Institute, Royal London Hospital, London, UK
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Radotic K, Todorovic S, Zakrzewska J, Jeremic M. Study of Photochemical Reactions of Coniferyl Alcohol. II. Comparative Structural Study of a Photochemical and Enzymatic Polymer of Coniferyl Alcohol. Photochem Photobiol 2008. [DOI: 10.1111/j.1751-1097.1998.tb02533.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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39
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Szumowski L, Bodalski R, Jedynak Z, Szufladowicz E, Kepski R, Derejko P, Urbanek P, Michalak E, Orczykowski M, Zakrzewska J, Przybylski A, Walczak F. The clinical course and risk in patients with pseudo-Mahaim fibers. Cardiol J 2008; 15:365-370. [PMID: 18698546] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023] Open
Abstract
BACKGROUND Pseudo-Mahaim (AP-M) fibers are a rare variant of atrioventricular (AV) accessory pathways. Atriofascicular and atrioventricular accessory connections are characterized by slow conduction and decremental properties. Dual physiological AV node pathways, slow and fast, are observed in a large number of patients with AP-M. Therefore, there is substrate for AV nodal reentrant tachycardia (AVNRT) in addition to antidromic AV reentrant tachycardia (AVRT) with left bundle branch block (LBBB)-like morphology. Other arrhythmia such as atrial fibrillation (AF) or atrial flutter (AFL) and ventricular fibrillation (VF) are also observed. We analysed the occurrence of arrhythmias in a group of patients with AP-M treated in our department. METHODS We evaluated 27 patients (12 women) aged 14-53 years (mean age 25.6 years) with AP-M. The clinical course in these patients, in particular with regard to the occurrence of arrhythmias, was analysed. Patients with dual AV node properties were compared to patients without such findings. RESULTS We found dual AV node properties in 18 patients (Group 1), while 9 patients had fast pathway only (Group 2). Twenty-six patients presented with AVRT, 2 patients with AVNRT, 3 patients with AF, 1 patient with AT, 2 patients with AFL, and 3 patients with VF. In 2 patients, AP-M were seen in an atypical area. In one patient, the pathway connected the right atrium with the left ventricle (septal region), and in the other patient it connected the left atrium with the left ventricle (left anterior region). CONCLUSIONS The majority of AP-M was right-sided. Two thirds of patients with AP-M had anatomical substrate for AVNRT (fast/slow pathway AV node). VF or asystole occurred in 10% of patients.
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Derejko P, Zakrzewska J, Szumowski Ł, Szufladowicz E, Bodalski R, Michałek P, Walczak E, Bilińska ZT, Walczak F. [RF ablation of longstanding persistent atrial fibrillation in patient with familial dilated cardiomyopathy]. Kardiol Pol 2008; 66:109-113. [PMID: 18266197] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
A vicious circle of interactions between dilated cardiomyopathy and longstanding persistent AF/AFL may cause symptoms of advanced congestive heart failure. In a 31-year-old patient with diagnosis of familial dilated cardiomyopathy and permanent AF lasting for five years, gradually decreased left ventricular ejection fraction (LVEF) and increased diameter of heart chambers - left ventricular diastolic dimension (LVdD) 7.7 cm, left atrium (LA) 5.4 cm, and LVEF 15% were noted. Pharmacological treatment was ineffective Successful RF ablation of AF/AFL substrate (CTI block, PVs isolation, CFAE ablation, roof and MIG line, CS applications) reversed symptoms of significant heart remodeling (LVdD 5.9 cm, LA 4.3 cm, LVEF 50%).
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Affiliation(s)
- Paweł Derejko
- Klinika Zaburzeń Rytmu Serca, Instytut Kardiologii, ul. Alpejska 42, 04-628 Warszawa.
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Orczykowski M, Szumowski L, Derejko P, Urbanek P, Szufladowicz E, Bodalski R, Zakrzewska J, Kawalec W, Knecht M, Bieganowska K, Walczak F. P2-66 NATURAL HISTORY OF ARRHYTHMIA IN CHILDREN AND ADOLESCENTS THAT UNDERWENT ATRIOVENTRICULAR NODE REENTRY TACHYCARDIA ABLATION. Int J Cardiol 2007. [DOI: 10.1016/s0167-5273(08)70668-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Szumowski L, Orczykowski M, Szufladowicz E, Urbanek P, Derejko P, Bodalski R, Dangel Z, Zakrzewska J, Przybylski A, Walczak F. P1-65 ABLATION OF MALIGNANT, DRUG RESISTANT TACHYARRHYTHMIA IN PREGNANT WOMEN. Int J Cardiol 2007. [DOI: 10.1016/s0167-5273(08)70591-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Zivić M, Zakrzewska J, Zizić M, Bacić G. 31P NMR study of polyphosphate levels during different growth phases of Phycomyces blakesleeanus. Antonie Van Leeuwenhoek 2007; 91:169-77. [PMID: 17080291 DOI: 10.1007/s10482-006-9108-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2005] [Accepted: 07/20/2006] [Indexed: 11/28/2022]
Abstract
The changes in relative polyphosphate content, estimated as the intensity ratio of core polyphosphate signal and intracellular inorganic phosphate signal from 31P NMR spectra, during the growth of Phycomyces blakesleeanus are reported. The ratio increases from 16 h to 28 h of growth, the minimum occurs at 32 h, followed by sharp increase up to 36 h, and a steady decrease afterwards. The changes in the biomass during mycelium growth showed steady increases, with a stagnation period between 32 h and 36 h during which a pronounced increase in the intensity ratio of core polyphosphates to intracellular inorganic phosphate signal occurred. The reduction of growth temperature from 22 degrees C to 18 degrees C significantly decreased the rate and intensity of growth, but the pattern of polyphosphate changes remained unchanged. The changes of the intensity ratio of core polyphosphates to intracellular inorganic phosphate signal are linked to characteristic stages of sporangiophore development. Analysis of core polyphosphates, intracellular inorganic phosphate and beta-ATP signal intensities suggest the role of polyphosphates as an energy and/or a phosphate reserves during Phycomyces development.
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Affiliation(s)
- Miroslav Zivić
- Institute of General and Physical Chemistry, Studentski trg 12-16, 11000 Belgrade, Serbia and Montenegro
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Yilmaz Z, Renton T, Yiangou Y, Zakrzewska J, Chessell IP, Bountra C, Anand P. Burning mouth syndrome as a trigeminal small fibre neuropathy: Increased heat and capsaicin receptor TRPV1 in nerve fibres correlates with pain score. J Clin Neurosci 2007; 14:864-71. [PMID: 17582772 DOI: 10.1016/j.jocn.2006.09.002] [Citation(s) in RCA: 175] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2006] [Revised: 09/20/2006] [Accepted: 09/22/2006] [Indexed: 11/15/2022]
Abstract
Burning mouth syndrome (BMS) is often an idiopathic chronic and intractable pain condition, affecting 1.5-5.5% of middle-aged and elderly women. We have studied the heat and capsaicin receptor TRPV1, and its regulator nerve growth factor (NGF), in BMS. Patients with BMS (n=10) and controls (n=10) were assessed for baseline and post-topical capsaicin pain scores, and their tongue biopsies immunostained for TRPV1, NGF, and structural nerve markers neurofilament and peripherin. Nerve fibres penetrating the epithelium were less abundant in BMS (p<0.0001), indicating a small fibre neuropathy. TRPV1-positive fibres were overall significantly increased in BMS (p=0.0011), as were NGF fibres (p<0.0001) and basal epithelial cell NGF staining (p<0.0147). There was a significant correlation between the baseline pain score and TRPV1 (p=0.0143) and NGF fibres (p=0.0252). A significant correlation was observed between baseline and post-capsaicin pain (p=0.0006). Selective TRPV1 and NGF blockers may provide a new therapy for BMS.
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Affiliation(s)
- Z Yilmaz
- Clinical and Diagnostic Oral Sciences, St Bartholomew's and Royal London School of Medicine and Dentistry, Queen Mary College, University of London, and Peripheral Neuropathy Unit, Hammersmith Hospital, London, UK
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Walczak F, Bodalski R, Szumowski L, Zakrzewska J, Derejko P, Szufladowicz E, Orczykowski M, Szaroszyk W, Szymański P, Baranowski R, Kepski R. [The vein of Marshall as a source of various types of atrial arrhythmias, including adrenergic paroxysmal atrial fibrillation--successful catheter ablation]. Kardiol Pol 2007; 65:724-30. [PMID: 17629839] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
We describe a case of a 44-year old man with recurrent atrial arrhythmias (atrial ectopy, atrial tachycardia and fibrillation) originating from the vein of Marshall (VoM). Stress, exertion and isoproterenol increased frequency and duration of highly symptomatic arrhythmia paroxysms. In 2002 he underwent two sessions of RF ablation. In the area of the left inferior pulmonary vein ostium (LIPV) and along the course the VoM, spiky, firing potentials were recorded. Ablation of the VoM region induced high frequency focal firing (CL approximately 200 ms) with 1: 1 VoM-->LA conduction. Before sinus rhythm return, a gradual increase of conduction of VoM-->LA block was observed. During the second session residual breakthroughs were recorded. During 5 years of follow-up the patient remained free from arrhythmia without antiarrhythmic drugs.
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Orczykowski M, Derejko P, Bodalski R, Szufladowicz E, Zakrzewska J, Urbanek P, Kepski R, Przybylski A, Szumowski L, Walczak F. [Wide QRS complex tachycardia in a patient after inferior myocardial infarction and CABG -- the role of electrophysiological study and RF ablation]. Kardiol Pol 2007; 65:603-7. [PMID: 17577856] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
We present a case of 53-year-old patient who experienced paroxysms of wide QRS complex tachycardia at a rate of 150 bpm and LBBB morphology 6 years after inferior myocardial infarction and CABG. Anamnesis and morphology of tachycardia could suggest ventricular tachycardia. However during electrophysiological study we observed AVRT with LBBB and "regularly irregular" AVRT with normal QRS complex and changing entrance to the AV node (through slow and fast pathway). In this paper we present our approach and try to explain why the tachycardia using concealed bypass tract appeared so late in life.
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Affiliation(s)
- Michał Orczykowski
- Klinika Zaburzeń Rytmu Serca, Instytut Kardiologii, ul Alpejska 42, 04-628 Warszawa, Poland.
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Aggarwal VR, Zakrzewska J. A wider spectrum. Br Dent J 2007; 202:300. [PMID: 17384590 DOI: 10.1038/bdj.2007.235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Derejko P, Zakrzewska J, Szumowski Ł, Urbanek P, Bodalski R, Szufladowicz E, Orczykowski M, Kepski R, Szajewski T, Zagrodzka M, Walczak F. [Spectrum of atrial arrhythmias from the right upper pulmonary vein--successful isolation of the arrhythmogenic focus by RF ablation of atriovenous breakthroughs--a case report]. Kardiol Pol 2007; 65:89-95. [PMID: 17295168] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
We present a case of a 19-year-old patient with incessant arrhythmias originating from the right upper pulmonary vein (RUPV) presenting as frequent premature beats, automatic rhythms mimicking sinus rhythm (SR) and pulmonary vein tachycardias. Morphology of P' wave resembled sinus P wave due to relatively short distance of the ectopic focus from the sinus node. Occasionally, when discharges from the focus were relatively slow (800-500 ms) and regular it was mimicking sinus rhythm. Activation preceding P' wave during arrhythmia was recorded in RUPV as well as in superior vena cava. In this paper we discuss our approach that allowed localising the arrhythmogenic focus in the RUPV. After isolation of the RUPV sinus rhythm was restored with tachycardia at a cycle length of 320 ms continuing in the isolated vein.
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Affiliation(s)
- Paweł Derejko
- Klinika Zaburzeń Rytmu Serca, Instytut Kardiologii, ul. Alpejska 42, Warszawa.
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Urbanek P, Kuklik P, Szumowski L, Derejko P, Kepski R, Bodalski R, Szufladowicz E, Przybylski A, Orczykowski M, Zakrzewska J, Zebrowski J, Walczak F. [Application of spectral frequency analysis in atrial fibrillation mechanism assessment]. Kardiol Pol 2006; 64:1021-5. [PMID: 17054038] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Recent studies have demonstrated spatio-temporal organisation in atrial fibrillation (AF), with a highest dominant frequencies (DF) at pulmonary veins ostia (PVo). We present a case of 58-year-old woman with AF evaluated by spectral frequency analysis. Simultaneous recordings at each veno-atrial junction and coronary sinus were obtained. Sequential fast Fourier transforms (FFT) of digitalized signals were performed. FFT profiles were analysed to determine DF. Low DF recorded at right inferior PVo suggested no contribution to AF process. Ablation of high DF PVo and low DF SVC with nonuniform anisotropic conduction resulted in AF termination and good clinical outcome in 1-year follow-up.
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Affiliation(s)
- Piotr Urbanek
- Instytut Kardiologii, ul. Alpejska 42, 04-628 Warszawa.
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Spasojević I, Zakrzewska J, Bacić GG. 31P NMR spectroscopy and polarographic combined study of erythrocytes treated with 5-fluorouracil: cardiotoxicity-related changes in ATP, 2,3-BPG, and O2 metabolism. Ann N Y Acad Sci 2006; 1048:311-20. [PMID: 16154943 DOI: 10.1196/annals.1342.028] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [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: 11/12/2022]
Abstract
Antineoplastic drug 5-fluorouracil (5-FU) frequently shows cardiotoxic effects, the mechanism of which has not yet been elucidated. The objective of the present study was to explore effects of 5-FU on metabolism of ATP, 2,3-BPG, and oxygen in erythrocytes and to relate these to the phenomenon of 5-FU cardiotoxicity. We determined that 5-FU induced rapid increase in O(2) consumption, which led to drastic changes in the metabolism of phosphate compounds in erythrocytes. Decrease in pO(2) provoked increase in production of 2,3-BPG and subsequent deoxygenation of oxyHb to deoxyHb. However, the most important effect of 5-FU on erythrocytes is severe decrease in the level of ATP. This could lead to a number of irreversible changes in erythrocyte structure and functioning, such as echinocytosis, increase in membrane fluidity, and non-functioning of membrane ion pumps. All these changes affect normal functioning of erythrocytes, leading to difficulties in oxygen transport and insufficient supply of oxygen to the heart, and pointing to the importance of studying the effects of antineoplastic drugs on intracellular metabolism of erythrocytes.
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Affiliation(s)
- Ivan Spasojević
- Faculty of Physical Chemistry, University of Belgrade, Serbia and Montenegro
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