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Pietrzak M, Skiba E, Wolf WM. Root-Applied Cerium Oxide Nanoparticles and Their Specific Effects on Plants: A Review. Int J Mol Sci 2024; 25:4018. [PMID: 38612829 PMCID: PMC11012102 DOI: 10.3390/ijms25074018] [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] [Subscribe] [Scholar Register] [Received: 02/16/2024] [Revised: 03/21/2024] [Accepted: 03/31/2024] [Indexed: 04/14/2024] Open
Abstract
With the pronounced increase in nanotechnology, it is likely that biological systems will be exposed to excess nanoparticles (NPs). Cerium oxide nanoparticles (CeO2 NPs) are among the most abundantly produced nanomaterials in the world. Their widespread use raises fundamental questions related to the accumulation in the environment and further interactions with living organisms, especially plants. NPs present in either soil or soilless environments are absorbed by the plant root systems and further transported to the aboveground parts. After entering the cytoplasm, NPs interact with chloroplast, nucleus, and other structures responsible for metabolic processes at the cellular level. In recent years, several studies have shown the impact of nanoceria on plant growth and metabolic processes. Research performed on different plants has shown a dual role for CeO2 NPs. The observed effects can be positive or negative and strongly depend on the plant species, characterization, and concentrations of NPs. This review describes the impact of root-applied CeO2 NPs on plant growth, photosynthesis, metal homeostasis, and parameters of induced oxidative stress.
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Affiliation(s)
- Monika Pietrzak
- Institute of General and Ecological Chemistry, Lodz University of Technology, Zeromskiego 114, 90-543 Lodz, Poland;
| | - Elżbieta Skiba
- Institute of General and Ecological Chemistry, Lodz University of Technology, Zeromskiego 114, 90-543 Lodz, Poland;
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Skiba E, Pietrzak M, Michlewska S, Gruszka J, Malejko J, Godlewska-Żyłkiewicz B, Wolf WM. Photosynthesis governed by nanoparticulate titanium dioxide. The Pisum sativum L. case study. Environ Pollut 2024; 340:122735. [PMID: 37848082 DOI: 10.1016/j.envpol.2023.122735] [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: 12/22/2022] [Revised: 10/10/2023] [Accepted: 10/12/2023] [Indexed: 10/19/2023]
Abstract
Wide availability of anthropogenic TiO2 nanoparticles facilitates their penetration into environment and prompts interactions with plants. They alter plants growth and change their nutritional status. In particular, metabolic processes are affected. In this work the effect of nanometric TiO2 on photosynthesis efficiency in green pea (Pisum sativum L.) was studied. Hydroponic cultivations with three Ti levels (10; 50 and 100 mg L-1) were applied. At all concentrations nanoparticles penetrated into plant tissues and were detected by the single particle ICP-MS/MS method. Nanoparticles altered the CO2 assimilation rate and gas exchange parameters (i.e. transpiration, stomatal conductance, sub-stomatal CO2 concentration). The most pronounced effects were observed for Ti 50 mg L-1 cultivation where photosynthesis efficiency, transpiration and stomatal conductance were increased by 14.69%, 4.58% and 8.92%, respectively. They were further confirmed by high maximum ribulose 1,5-bisphosphate carboxylation rate (27.40% increase), maximum electron transport rate (21.51% increase) and the lowest CO2 compensation point (45.19% decrease). Furthermore, concentrations of Cu, Mn, Zn, Fe, Mg, Ca, K and P were examined with the most pronounced changes observed for elements directly involved in photosynthesis (Cu, Zn, Mn, and Fe). The Cu concentrations in roots, stems and leaves for Ti 50 mg L-1 cultivation were below the control by 33.15%, 38.28% and 10.76%, respectively. The Zn content in analogous treatment and organs decreased by 30.24%, 26.69% and 13.35%. The Mn and Fe levels in leaves were increased by 72.22% and 50.32%, respectively. Our results indicated that plant defence mechanisms which restrain the water uptake have been overcome in pea by photocatalytic activity of nanoparticulate TiO2 which stimulated photosynthesis. On the contrary to the substantial stomatal conductance, the transpiration has been reduced because exceptional part of water flow was already consumed in chloroplasts and could not have been freed to the atmosphere.
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Affiliation(s)
- Elżbieta Skiba
- Institute of General and Ecological Chemistry, Lodz University of Technology, Poland.
| | - Monika Pietrzak
- Institute of General and Ecological Chemistry, Lodz University of Technology, Poland
| | - Sylwia Michlewska
- Faculty of Biology and Environmental Protection, Laboratory of Microscopic Imaging and Specialized Biological Techniques, University of Lodz, Poland
| | - Jakub Gruszka
- Department of Analytical and Inorganic Chemistry, Faculty of Chemistry, University of Bialystok, Poland
| | - Julita Malejko
- Department of Analytical and Inorganic Chemistry, Faculty of Chemistry, University of Bialystok, Poland
| | | | - Wojciech M Wolf
- Institute of General and Ecological Chemistry, Lodz University of Technology, Poland
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Pietrzak M, Szabelski M, Wołąkiewicz G, Wieczorek Z. Spectroscopy studies of interaction hypericin with an anti-cancer therapy drug doxorubicin. Biophys Chem 2022; 288:106858. [PMID: 35905651 DOI: 10.1016/j.bpc.2022.106858] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 05/23/2022] [Revised: 07/05/2022] [Accepted: 07/15/2022] [Indexed: 11/02/2022]
Abstract
The presented study was designed to estimate the ability of hypericin to interact with the anticancer drug doxorubicin. The hetero-association of hypericin and doxorubicin was investigated with absorption and fluorescence spectroscopy methods in aqueous solution of DMSO in two-component mixtures: doxorubicin-hypericin and three component mixtures: DNA-doxorubicin-hypericin. The data indicate that hypericin forms complexes with doxorubicin and that the association constants are on the order of 300,000 M-1 in a buffer with 30% DMSO content. The absorption spectra of the hypericin - doxorubicin complexes were examined as well. Owing to its ability to interact with flat aromatic compounds, hypericin may potentially be used as an interceptor molecule to detoxification of patients after chemotherapy.
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Affiliation(s)
- Monika Pietrzak
- Department of Physics and Biophysics, University of Warmia and Mazury in Olsztyn, Oczapowskiego 4, 10-719 Olsztyn, Poland.
| | - Mariusz Szabelski
- Department of Physics and Biophysics, University of Warmia and Mazury in Olsztyn, Oczapowskiego 4, 10-719 Olsztyn, Poland
| | - Grzegorz Wołąkiewicz
- Department of Physics and Biophysics, University of Warmia and Mazury in Olsztyn, Oczapowskiego 4, 10-719 Olsztyn, Poland
| | - Zbigniew Wieczorek
- Department of Physics and Biophysics, University of Warmia and Mazury in Olsztyn, Oczapowskiego 4, 10-719 Olsztyn, Poland
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Skiba E, Pietrzak M, Glińska S, Wolf WM. The Combined Effect of ZnO and CeO 2 Nanoparticles on Pisum sativum L.: A Photosynthesis and Nutrients Uptake Study. Cells 2021; 10:3105. [PMID: 34831328 PMCID: PMC8624121 DOI: 10.3390/cells10113105] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 11/03/2021] [Accepted: 11/05/2021] [Indexed: 01/08/2023] Open
Abstract
Cerium oxide nanoparticles (CeO2 NPs) and zinc oxide nanoparticles (ZnO NPs) are emerging pollutants that are likely to occur in the contemporary environment. So far, their combined effects on terrestrial plants have not been thoroughly investigated. Obviously, this subject is a challenge for modern ecotoxicology. In this study, Pisum sativum L. plants were exposed to either CeO2 NPs or ZnO NPs alone, or mixtures of these nano-oxides (at two concentrations: 100 and 200 mg/L). The plants were cultivated in hydroponic system for twelve days. The combined effect of NPs was proved by 1D ANOVA augmented by Tukey's post hoc test at p = 0.95. It affected all major plant growth and photosynthesis parameters. Additionally, HR-CS AAS and ICP-OES were used to determine concentrations of Cu, Mn, Fe, Mg, Ca, K, Zn, and Ce in roots and shoots. Treatment of the pea plants with the NPs, either alone or in combination affected the homeostasis of these metals in the plants. CeO2 NPs stimulated the photosynthesis rate, while ZnO NPs prompted stomatal and biochemical limitations. In the mixed ZnO and CeO2 treatments, the latter effects were decreased by CeO2 NPs. These results indicate that free radicals scavenging properties of CeO2 NPs mitigate the toxicity symptoms induced in the plants by ZnO NPs.
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Affiliation(s)
- Elżbieta Skiba
- Institute of General and Ecological Chemistry, Lodz University of Technology, 90-924 Lodz, Poland; (M.P.); (W.M.W.)
| | - Monika Pietrzak
- Institute of General and Ecological Chemistry, Lodz University of Technology, 90-924 Lodz, Poland; (M.P.); (W.M.W.)
| | - Sława Glińska
- Laboratory of Microscopic Imaging and Specialized Biological Techniques, Faculty of Biology and Environmental Protection, University of Lodz, 90-237 Lodz, Poland;
| | - Wojciech M. Wolf
- Institute of General and Ecological Chemistry, Lodz University of Technology, 90-924 Lodz, Poland; (M.P.); (W.M.W.)
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Oezkan F, Seweryn M, Pietrzak M, Byun W, Owen D, Schulze K, Nicholas A, Hilz S, Grindheim J, Johnson A, Kwiatkowski D, Wistuba I, Johnson B, Kris M, Rusch V, Lee J, Lozanski G, Carbone D. MA09.01 LCMC3: Immune Cell Subtypes Predict Nodal Status and Pathologic Response After Neoadjuvant Atezolizumab in Resectable NSCLC. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.08.152] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [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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Gawrecki A, Zozulinska-Ziolkiewicz D, Michalak MA, Adamska A, Michalak M, Frackowiak U, Flotynska J, Pietrzak M, Czapla S, Gehr B, Araszkiewicz A. Safety and glycemic outcomes of do-it-yourself AndroidAPS hybrid closed-loop system in adults with type 1 diabetes. PLoS One 2021; 16:e0248965. [PMID: 33819289 PMCID: PMC8021167 DOI: 10.1371/journal.pone.0248965] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Accepted: 03/04/2021] [Indexed: 12/12/2022] Open
Abstract
Background The aim of the study was to assess the safety and glycemic outcomes with the use of a Do-It-Yourself (DIY) Hybrid Closed-Loop (HCL) system based on the AndroidAPS application in type 1 diabetes (T1D). Methods Single-center clinical trial, with 3-week run-in and 12-week study period. DIY HCL system consisted of the Dana Diabecare RS insulin pump, Dexcom G5 continuous glucose monitoring system and AndroidAPS application. Primary outcome was safety: incidences of severe hypoglycemia, diabetic ketoacidosis, time spent in glycemia <54 mg/dl. Secondary endpoints included percentage of time in range (TIR) 70–180 mg/dl, time below 70 mg/dl, HbA1c, insulin requirements, and body weight. Results In total 12 subjects (5 men, 7 women) were enrolled, mean age 31.3±6.7, 95%CI(27.7–34.9) years, mean diabetes duration 16.1±5.7, 95%CI(13.0–19.2) years. No episodes of severe hypoglycemia or ketoacidosis were observed. Percentage of time spent in glycemia below 54mg/dl was not increased. Average sensor glycemia was lower in the study period than baseline (141.1 ± 8.4, 95%CI(136.3–145.9) vs. 153.3 ± 17.9, 95%CI(143.2–163.4), mg/dl p<0.001). TIR 70–180 mg/dl was improved by 11.3%, 95%CI(2.8%-19.8%) (from 68.0 ± 12.7 to 79.3 ± 6.4%, p<0.001), without increasing hypoglycemia time. The HbA1c level decreased by -0.5%, 95%CI(-0.9%–-0.1%) (from 6.8 ± 0.5 to 6.3 ± 0.4%, p<0.001). Additionally, in the last 4 weeks of the study period participants significantly improved and showed TIR 70–180 mg/dl 82.1 ± 5.6%, 95%CI(78.9–85.3), time <54 mg/dl 0.30 (0.20–0.55)%, median 95%CI(0.1–0.7) and <70 mg/dl 1.90 (1.10–3.05)%, median 95%CI(0.7–3.2). The insulin requirement and body weight did not change in the study. Conclusions The study revealed safety of the Do-It-Yourself HCL system AndroidAPS in adults with T1D, limited to well-controlled, highly selected and closely monitored patients. The use of AndroidAPS significantly improved HbA1c, time in range and average sensor glycemia without increasing hypoglycemia. As both patients and their medical team are gaining experience using the system over time, they improve glycemic control. Trial registration German Clinical Trials Register: no. DRKS00015439; https://www.drks.de/drks_web/navigate.do?navigationId=trial.HTML&TRIAL_ID=DRKS00015439.
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Affiliation(s)
- Andrzej Gawrecki
- Department of Internal Medicine and Diabetology, Poznan University of Medical Sciences, Poznan, Poland
| | | | | | - Anna Adamska
- Department of Internal Medicine and Diabetology, Poznan University of Medical Sciences, Poznan, Poland
| | - Michal Michalak
- Department of Computer Sciences and Statistics, Poznan University of Medical Sciences, Poznan, Poland
| | - Urszula Frackowiak
- Department of Diabetology and Internal Medicine, Raszeja Hospital, Poznan, Poland
| | - Justyna Flotynska
- Department of Internal Medicine and Diabetology, Poznan University of Medical Sciences, Poznan, Poland
| | - Monika Pietrzak
- Department of Diabetology and Internal Medicine, Raszeja Hospital, Poznan, Poland
| | | | - Bernhard Gehr
- Zentrum für Diabetes und Stoffwechselerkrankungen, m&i Fachklinik, Bad Heilbrunn, Germany
| | - Aleksandra Araszkiewicz
- Department of Internal Medicine and Diabetology, Poznan University of Medical Sciences, Poznan, Poland
- * E-mail:
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Skiba E, Pietrzak M, Gapińska M, Wolf WM. Metal Homeostasis and Gas Exchange Dynamics in Pisum sativum L. Exposed to Cerium Oxide Nanoparticles. Int J Mol Sci 2020; 21:E8497. [PMID: 33187383 PMCID: PMC7696629 DOI: 10.3390/ijms21228497] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2020] [Revised: 11/05/2020] [Accepted: 11/09/2020] [Indexed: 02/07/2023] Open
Abstract
Cerium dioxide nanoparticles are pollutants of emerging concern. They are rarely immobilized in the environment. This study extends our work on Pisum sativum L. as a model plant, cultivated worldwide, and is well suited for investigating additive interactions induced by nanoceria. Hydroponic cultivation, which prompts accurate plant growth control and three levels of CeO2 supplementation, were applied, namely, 100, 200, and 500 mg (Ce)/L. Phytotoxicity was estimated by fresh weights and photosynthesis parameters. Additionally, Ce, Cu, Zn, Mn, Fe, Ca, and Mg contents were analyzed by high-resolution continuum source atomic absorption and inductively coupled plasma optical emission techniques. Analysis of variance has proved that CeO2 nanoparticles affected metals uptake. In the roots, it decreased for Cu, Zn, Mn, Fe, and Mg, while a reversed process was observed for Ca. The latter is absorbed more intensively, but translocation to above-ground parts is hampered. At the same time, nanoparticulate CeO2 reduced Cu, Zn, Mn, Fe, and Ca accumulation in pea shoots. The lowest Ce concentration boosted the photosynthesis rate, while the remaining treatments did not induce significant changes. Plant growth stimulation was observed only for the 100 mg/L. To our knowledge, this is the first study that demonstrates the effect of nanoceria on photosynthesis-related parameters in peas.
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Affiliation(s)
- Elżbieta Skiba
- Institute of General and Ecological Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland; (M.P.); (W.M.W.)
| | - Monika Pietrzak
- Institute of General and Ecological Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland; (M.P.); (W.M.W.)
| | - Magdalena Gapińska
- Laboratory of Microscopic Imaging and Specialized Biological Techniques, Faculty of Biology and Environmental Protection, University of Lodz, Banacha 12/16, 90-237 Lodz, Poland;
| | - Wojciech M. Wolf
- Institute of General and Ecological Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland; (M.P.); (W.M.W.)
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Skiba E, Michlewska S, Pietrzak M, Wolf WM. Additive interactions of nanoparticulate ZnO with copper, manganese and iron in Pisum sativum L., a hydroponic study. Sci Rep 2020; 10:13574. [PMID: 32782343 PMCID: PMC7421903 DOI: 10.1038/s41598-020-70303-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Accepted: 07/27/2020] [Indexed: 02/07/2023] Open
Abstract
Widespread occurrence of ZnO nanoparticles in environment follows the growing number of applications either in technology or agriculture. The impact of five forms of nanoparticulate ZnO on copper, manganese and iron uptake by Pisum sativum L. cultivated in Hoagland solutions was investigated. Plants were collected after twelve days of zinc administration. Effect of bulk ZnO has also been studied. Initial zinc concentration was 100 mg L-1. Nanoparticles were characterized by the Transmission Electron Microscopy, Dynamic Light Scattering and Zeta potential measurements. Metal contents were analyzed using the Atomic Absorption Spectrometry with flame atomization for samples digested in a microwave closed system. Analysis of variance indicated that zinc species at either molecular or nanoscale levels altered Cu, Mn and Fe uptake and their further transport in pea plants. In particular, significant reduction of Mn and Fe combined with the Cu increase was observed. Additive interactions originated by nanoparticles affect the heavy metals uptake and indicate pollutants migration pathways in plants. Unfortunately, regulations for the plant cultivation were formulated when anthropogenic nanoparticles were not in common use. They underestimate complexity of metals interactions in either plant or habitat. Our results indicate that these additive interactions cannot be neglected and deserve further investigations.
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Affiliation(s)
- Elżbieta Skiba
- Institute of General and Ecological Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924, Lodz, Poland.
| | - Sylwia Michlewska
- Laboratory of Microscopic Imaging and Specialized Biological Techniques, Faculty of Biology and Environmental Protection, University of Lodz, Banacha 12/16, 90-237, Lodz, Poland
| | - Monika Pietrzak
- Institute of General and Ecological Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924, Lodz, Poland
| | - Wojciech M Wolf
- Institute of General and Ecological Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924, Lodz, Poland
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Oezkan F, He K, Owen D, Pietrzak M, Cho J, Kitzler R, Pearson R, Rusch V, Chaft J, Suh R, Blasberg J, Reckamp K, Raz D, Kneuertz P, Fiorillo L, Garon E, Nicholas A, Johnson A, Schulze K, Grindheim J, Banchereau R, Phan S, Bunn P, Kwiatkowski D, Johnson B, Kris M, Wistuba I, Lee J, Lozanski G, Carbone D. OA13.07 Neoadjuvant Atezolizumab in Resectable NSCLC Patients: Immunophenotyping Results from the Interim Analysis of the Multicenter Trial LCMC3. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.482] [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: 10/25/2022]
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Grabowska-Jadach I, Kalinowska D, Drozd M, Pietrzak M. Synthesis, characterization and application of plasmonic hollow gold nanoshells in a photothermal therapy—New particles for theranostics. Biomed Pharmacother 2019; 111:1147-1155. [DOI: 10.1016/j.biopha.2019.01.037] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Revised: 12/20/2018] [Accepted: 01/09/2019] [Indexed: 10/27/2022] Open
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Bielewicz M, Milewicz-Zalewska M, Grodzicka-Kobylka M, Mianowski S, Sibczynski P, Swiderski L, Szczesniak T, Linczuk M, Wielanek D, Kisiel A, Kasprowicz G, Pozniak K, Zabołotny W, Romaniuk R, Chłopik A, Bancer A, Grodzicki K, Pietrzak M, Dudziński A, Jaworska E, Strugalska-Gola E, Peryt MJ, Rybczynski M, Wlodarczyk Z, Stefanek G, Kankiewicz P. MCORD - MPD Cosmic Ray Detector a new features. EPJ Web Conf 2019. [DOI: 10.1051/epjconf/201920407016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The main detector system at the Nuclotron-based Ion Collider fAcility (NICA) located in Dubna, Russia is the Multi-Purpose Detector (MPD). For better calibration reason, the MPD needs an additional trigger system for an off-beam calibration of MPD sub-detectors and for rejection (veto) of cosmic muons. The system should also be useful for practical astrophysics observations of cosmic showers. The consortium NICA-PL group defines goals and basic assumptions for the MPD Cosmic Ray Detector (MCORD). This article describes the conceptual design and simulation plans of the MCORD detector based on plastic scintillators with SiPM photodetectors and electronic digital system based on the MicroTCA crate.
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Bantsar A, Colautti P, Conte V, Hilgers G, Pietrzak M, Pszona S, Rabus H, Selva A. State of The Art of Instrumentation in Experimental Nanodosimetry. Radiat Prot Dosimetry 2018; 180:177-181. [PMID: 29194515 DOI: 10.1093/rpd/ncx263] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2017] [Indexed: 05/04/2023]
Abstract
Nanodosimetry is a branch of dosimetry for investigation and modeling of the interaction pattern of ionizing radiation in nanometre site-sizes (at unit density), which dates back to the 1970's (Pszona S. A track ion counter. Proceedings of Fifth Symposium on Microdosimetry EUR 5452 d-e-f, Published by the Commission of the European Communities, Luxemburg, pp. 1107-1122 (1976)). To date, the different experimental approaches have lead to developing of three fully functional nanodosimeters: the Jet Counter operated at NCBJ, the Ion Counter operated at PTB and Startrack Counter operated at INFN-LNL. Descriptions of each nanodosimeter as well as of the techniques used to investigate the track structure of ionizing particles are presented.
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Affiliation(s)
- A Bantsar
- National Centre for Nuclear Research (NCBJ), ul. Andrzeja Soltana 7, Otwock-Swierk, Poland
| | - P Colautti
- Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali di Legnaro, Viale dell'Università 2, Legnaro PD, Italy
| | - V Conte
- Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali di Legnaro, Viale dell'Università 2, Legnaro PD, Italy
| | - G Hilgers
- Physikalisch-Technische Bundesanstalt, Bundesallee 100, Braunschweig, Germany
| | - M Pietrzak
- National Centre for Nuclear Research (NCBJ), ul. Andrzeja Sołtana 7, Otwock-Świerk, Poland
- Faculty of Physics, University of Warsaw, Pasteura 5, Warszawa, Poland
| | - S Pszona
- National Centre for Nuclear Research (NCBJ), ul. Andrzeja Soltana 7, Otwock-Swierk, Poland
| | - H Rabus
- Physikalisch-Technische Bundesanstalt, Bundesallee 100, Braunschweig, Germany
| | - A Selva
- Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali di Legnaro, Viale dell'Università 2, Legnaro PD, Italy
- Department of Physics and Astronomy, University of Padova, Via Marzolo 8, Padova, Italy
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Conte V, Selva A, Colautti P, Hilgers G, Rabus H, Bantsar A, Pietrzak M, Pszona S. NANODOSIMETRY: TOWARDS A NEW CONCEPT OF RADIATION QUALITY. Radiat Prot Dosimetry 2018; 180:150-156. [PMID: 29036364 DOI: 10.1093/rpd/ncx175] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Accepted: 08/17/2017] [Indexed: 05/03/2023]
Abstract
The biological action of ionizing charged particles is initiated at the DNA level, and the effectiveness with which the initial physical effect changes into measurable biological damage is likely ruled by the stochastics of ionizations produced by the incident ions in subcellular nanometric volumes. Based on this hypothesis, experimental nanodosimetry aims at establishing a new concept of radiation quality that builds on measurable characteristics of the particle track structure at the nanometer scale. Three different nanodosimetric detection systems have been developed to date that allow measurements of the number of ionizations produced by the passage of a primary particle in a nanometer-size gas volume (in unit density scale). Within the Italian project MITRA (MIcrodosimetry and TRAck structure), funded by the Italian Istituto Nazionale di Fisica Nucleare (INFN) and the EMRP Joint Research Project 'BioQuaRT' (Biologically Weighted Quantities in Radiotherapy), experiments have been carried out, in which the frequency distribution of ionizations produced by proton and carbon ion beams of given energy was measured with the three nanodosimetric detectors. Descriptors of the track structure can be derived from these distributions. In particular, the first moment M1, representing the mean number of ionizations produced in the target volume, and the cumulative probability Fk of measuring a number ν ≥ k of ionizations. The correlation between measured nanodosimetric quantities and experimental radiobiological data available in the literature is here presented and discussed.
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Affiliation(s)
- V Conte
- INFN-Legnaro National Laboratories, Viale dell'Università 2, Legnaro, Italy
| | - A Selva
- INFN-Legnaro National Laboratories, Viale dell'Università 2, Legnaro, Italy
- Department of Physics and Astronomy, University of Padova, via Marzolo 8, Padova, Italy
| | - P Colautti
- INFN-Legnaro National Laboratories, Viale dell'Università 2, Legnaro, Italy
| | - G Hilgers
- Physikalisch-Technische Bundesanstalt (PTB), Braunschweig, Germany
| | - H Rabus
- Physikalisch-Technische Bundesanstalt (PTB), Braunschweig, Germany
| | - A Bantsar
- NCBJ, ul. Andrzeja Soltana 7, Otwock-Swierk , Poland
| | - M Pietrzak
- NCBJ, ul. Andrzeja Soltana 7, Otwock-Swierk, Poland
- Faculty of Physics, University of Warsaw, ul. Pasteura 5, Warsaw, Poland
| | - S Pszona
- NCBJ, ul. Andrzeja Soltana 7, Otwock-Swierk , Poland
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Uruska A, Zozulinska-Ziolkiewicz D, Niedzwiecki P, Pietrzak M, Wierusz-Wysocka B. TG/HDL-C ratio and visceral adiposity index may be useful in assessment of insulin resistance in adults with type 1 diabetes in clinical practice. J Clin Lipidol 2018. [PMID: 29523408 DOI: 10.1016/j.jacl.2018.01.005] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
BACKGROUND Insulin resistance (IR) is an important clinical issue in patients with type 1 diabetes due to worse metabolic control and risk of development of chronic complications. OBJECTIVE The aim of the study was to evaluate simple and easily available parameters as indirect markers of IR in adults with type 1 diabetes and correlate it with the results of hyperinsulinemic-euglycemic clamp. METHODS The study included 88 patients (62 men), aged 34.1 ± 6.5 years, with type 1 diabetes with a median disease duration of 8 (7-13) years and mean HbA1c of 7.6 ± 1.5%. Tissue sensitivity to insulin was assessed on the basis of glucose distribution rate (GDR) obtained in the course of hyperinsulinemic-euglycemic clamp. In addition, indirect markers of IR, such as estimated GDR, presence of features of metabolic syndrome, visceral adiposity index (VAI), and the triglyceride (TG)/high-density lipoprotein cholesterol (HDL-C) ratio, were evaluated. RESULTS In the study group, IR defined as GDR <4 mg/kg/min was observed in 33 (37.5%) patients. Group with IR had significantly higher postprandial glycemia (9.1 ± 2.0 vs 8.4 ± 1.1 mmol/L, P = .04), serum TG level (1.11 [0.75-1.92] vs 0.85 [0.60-1.08] mmol/L, P = .001), lower HDL-C level (1.59 ± 0.38 vs 1.8 ± 0.5 mmol/L, P = .02), higher TG/HDL-C ratio (1.60 [1.00-3.13] vs 1.05 [0.62-1.53], P = .001), and higher VAI (2.61 [1.31-4.25] vs 1.56 [0.96-2.25], P = .002). Significant relationship between GDR and TG/HDL-C ratio and VAI, adjusted for age, sex, HbA1c, and duration of diabetes was revealed (respectively, odds ratio 1.90 [95% confidence interval 1.15-3.15], P = .01 and odds ratio 1.47 [95% confidence interval 1.06-2.04], P = .01). CONCLUSIONS TG/HDL-C ratio and VAI appear to be clinically useful tools to assess IR in adults with type 1 diabetes.
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Affiliation(s)
- Aleksandra Uruska
- Department of Internal Medicine and Diabetology, Poznan University of Medical Sciences, Poznan, Poland.
| | | | - Pawel Niedzwiecki
- Department of Internal Medicine and Diabetology, Poznan University of Medical Sciences, Poznan, Poland
| | - Monika Pietrzak
- Department of Internal Medicine and Diabetology, Poznan University of Medical Sciences, Poznan, Poland
| | - Bogna Wierusz-Wysocka
- Department of Internal Medicine and Diabetology, Poznan University of Medical Sciences, Poznan, Poland
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Pietrzak M, Szabelski M, Kasparek A, Wieczorek Z. Interactions of hypericin with a model mutagen – Acridine orange analyzed by light absorption and fluorescence spectroscopy. Chem Phys Lett 2017. [DOI: 10.1016/j.cplett.2016.12.040] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Korohoda W, Hapek A, Pietrzak M, Ryszawy D, Madeja Z. 9-AAA inhibits growth and induces apoptosis in human melanoma A375 and rat prostate adenocarcinoma AT-2 and Mat-LyLu cell lines but does not affect the growth and viability of normal fibroblasts. Oncol Lett 2016; 12:4125-4132. [PMID: 27895781 DOI: 10.3892/ol.2016.5201] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2015] [Accepted: 06/08/2016] [Indexed: 11/05/2022] Open
Abstract
The present study found that, similarly to 5-fluorouracil, low concentrations (1-10 µM) of 9-aminoacridine (9-AAA) inhibited the growth of the two rat prostate cancer AT-2 and Mat-LyLu cell lines and the human melanoma A375 cell line. However, at the same concentrations, 9-AAA had no effect on the growth and apoptosis of normal human skin fibroblasts (HSFs). The differences between the cellular responses of the AT-2 and Mat-LyLu cell lines, which differ in malignancy, were found to be relatively small compared with the differences between normal HSFs and the cancer cell lines. Visible effects on the cell growth and survival of tumor cell lines were observed after 24-48 h of treatment with 9-AAA, and increased over time. The inhibition of cancer cell growth was found to be due to the gradually increasing number of cells dying by apoptosis, which was observed using two methods, direct counting and FlowSight analysis. Simultaneously, cell motile activity decreased to the same degree in cancer and normal cells within the first 8 h of incubation in the presence of 9-AAA. The results presented in the current study suggest that short-lasting tests for potential anticancer substances can be insufficient; which may result in cell type-dependent differences in the responses of cells to tested compounds that act with a delay being overlooked. The observed differences in responses between normal human fibroblasts and cancer cells to 9-AAA show the requirement for additional studies to be performed simultaneously on differently reacting cancer and normal cells, to determine the molecular mechanisms responsible for these differences.
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Affiliation(s)
- Włodzimierz Korohoda
- Department of Cell Biology, Faculty of Biophysics, Biochemistry and Biotechnology, Jagiellonian University, Krakow 30-387, Poland
| | - Anna Hapek
- Department of Cell Biology, Faculty of Biophysics, Biochemistry and Biotechnology, Jagiellonian University, Krakow 30-387, Poland
| | - Monika Pietrzak
- Department of Cell Biology, Faculty of Biophysics, Biochemistry and Biotechnology, Jagiellonian University, Krakow 30-387, Poland
| | - Damian Ryszawy
- Department of Cell Biology, Faculty of Biophysics, Biochemistry and Biotechnology, Jagiellonian University, Krakow 30-387, Poland
| | - Zbigniew Madeja
- Department of Cell Biology, Faculty of Biophysics, Biochemistry and Biotechnology, Jagiellonian University, Krakow 30-387, Poland
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Wieczorek J, Sienkiewicz S, Pietrzak M, Wieczorek Z. Uptake and phytotoxicity of anthracene and benzo[k]fluoranthene applied to the leaves of celery plants (Apium graveolens var. secalinum L.). Ecotoxicol Environ Saf 2015; 115:19-25. [PMID: 25666733 DOI: 10.1016/j.ecoenv.2015.01.032] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [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: 10/28/2014] [Revised: 01/27/2015] [Accepted: 01/31/2015] [Indexed: 05/15/2023]
Abstract
The above-ground parts of celery plants were exposed to two polycyclic aromatic hydrocarbons (PAHs): 3-ring anthracene (ANT) and 5-ring benzo[k]fluoranthene (BkF), and the combination of ANT and BkF. After 43 days of exposure (overall dose of 1325µg/plant), celery plants retained only 1.4% of the total dose of ANT and 17.5% of the total dose of BkF. After exposure to a combination of ANT and BkF (1325µg of each compound per plant), the average ANT concentrations were more than twofold higher in/on leaf blades, whereas BkF levels were insignificantly higher. Under natural photoperiod conditions equivalent to a normal day, the combined application of ANT and BkF to the above-ground parts of celery plants slowed down physicochemical transformations of ANT. A similar effect was observed when PAHs were applied to glass surfaces. The combination of both PAHs probably led to stacking interactions, which decreased volatilization, in particular of ANT. Phytotoxicity of ANT and BkF could not be unambiguously established based on the results of this study. In all analyzed treatments, the chlorophyll content of leaf blades remained unchanged. Foliar application of ANT reduced ascorbic acid levels in all analyzed plant parts and increased the total acidity of celery leaves. In all experimental treatments, the total phenolic content of leaves increased up to 15%. Interestingly, ANT and BkF did not produce cumulative effects when applied in combination (when total PAH concentrations per plant were twofold higher).
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Affiliation(s)
- Jolanta Wieczorek
- Faculty of Food Sciences, University of Warmia and Mazury in Olsztyn, Plac Cieszyński 1, 10-726 Olsztyn, Poland.
| | - Stanisław Sienkiewicz
- Department of Agricultural Chemistry and Environmental Protection, University of Warmia and Mazury in Olsztyn, Oczapowskiego 8, 10-744 Olsztyn, Poland.
| | - Monika Pietrzak
- Department of Physics and Biophysics, University of Warmia and Mazury in Olsztyn, Oczapowskiego 4, 10-719 Olsztyn, Poland.
| | - Zbigniew Wieczorek
- Department of Physics and Biophysics, University of Warmia and Mazury in Olsztyn, Oczapowskiego 4, 10-719 Olsztyn, Poland.
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Pietrzak M, Maciejczyk M, Szabelski M, Kasparek A, Wieczorek Z. Self-association of hypericin analyzed by light absorption and fluorescence spectroscopy and molecular dynamics simulations. Chem Phys Lett 2014. [DOI: 10.1016/j.cplett.2014.03.076] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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19
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Steppa R, Szkudelska K, Wójtowski J, Stanisz M, Szumacher-Strabel M, Czyżak-Runowska G, Cieślak A, Markiewicz-Kęszycka M, Pietrzak M. The metabolic profile of growing lambs fed diets rich in unsaturated fatty acids. J Anim Physiol Anim Nutr (Berl) 2014; 98:914-20. [PMID: 24387699 DOI: 10.1111/jpn.12158] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [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: 10/26/2013] [Accepted: 12/04/2013] [Indexed: 11/27/2022]
Abstract
The effect of two diets enriched with unsaturated fatty acids--one containing the addition of dried distillers grains with solubles (DGS) and the other the addition of false flax--Camelina sativa cake (CS)--on some metabolic parameters and hormone concentration in growing lambs was determined in this experiment. A total of 21 ram lambs of the Polish Whiteheaded mutton sheep were divided into three groups (the control, receiving DGS and CS). The diets were administered to animals for 6 weeks. During the experiment, peripheral blood was collected. Glucose (GL), total cholesterol (CH), triglycerides (TG), free fatty acids (FFA), insulin (IN), leptin (LE), triiodothyronine (T3) and thyroxine (T4) were assayed in serum. The age-dependent reduction in CH and TG limited by both experimental diets were observed. A significant increase in FFA concentration was observed in samples collected in the last, that is, third, time period. This was most probably caused by a 12-h pre-slaughter fasting period. A significantly lower dynamic of FFA increase in that experimental period was found in animals receiving the experimental feed. Insulin concentration in DGS-receiving lambs was increased, in contrast to the CS-receiving lambs, in which it was lower when compared to the control. LE concentration was decreased by both experimental diets, more markedly in the DGS-receiving animals. No differences between the experimental groups and the control were observed in T3 and T4 concentrations. The effect of 12-h pre-slaughter fasting was statistically highly significant for the levels of examined blood markers and hormones, except for TG and IN in the group of lambs receiving the experimental diet with CS.
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Affiliation(s)
- R Steppa
- Department of Small Mammal Breeding and Raw Materials of Animal Origin, Faculty of Animal Breeding and Biology, Poznań University of Life Sciences, Złotniki, Poland
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Józefowicz M, Bajorek A, Pietrzak M, Heldt JR. Quantum-chemical calculations of the electronic structure of 2-amino-1,3-dicyano-5,6,7,8-tetrahydronaphthalene derivatives. Spectrochim Acta A Mol Biomol Spectrosc 2013; 113:137-144. [PMID: 23719413 DOI: 10.1016/j.saa.2013.04.077] [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] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2013] [Revised: 04/19/2013] [Accepted: 04/22/2013] [Indexed: 06/02/2023]
Abstract
The UV-Visible absorption spectra of six, newly synthesized donor-substituted 2-amino-1,3-dicyano-5,6,7,8-tetrahydronaphthalene have been measured in methylcyclohexane (MCH) and assigned with the help of quantum-chemical calculations. Our calculations have been performed to assess information regarding the electronic state energy values, corresponding oscillator strengths, x-, y-, z-components of the transition dipole moments and molecular orbitals involved in the main electronic transitions of the studied compounds. Additionally, the experimental absorption transition dipole moments were calculated, on the basis of spectroscopic data, and compared with results of our quantum-chemical calculations. On the basis of the experimental results and quantum-chemical calculations, it was shown that the long-wavelength absorption band involves an overlap of three electronic transitions of different character. For all studied donor-acceptor (D-A) compounds in vapour-phase, the long-wavelength transition (S0→S1) does not possess charge transfer character, whereas the S0→S2 transition possesses electron transfer character e.g., π-electrons of the acceptor moiety are moved to the donor part. Moreover, it is found that the electronic structure of the studied biphenyl derivatives can be approximately described within composite-model of decoupled moieties: donor and acceptor.
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Affiliation(s)
- M Józefowicz
- Institute of Experimental Physics, University of Gdańsk, Wita Stwosza 57, 80-952 Gdańsk, Poland.
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21
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Sliwowski R, Andrzejewski M, Wieczorek A, Barinow-Wojewódzki A, Jadczak L, Adrian S, Pietrzak M, Wieczorek S. Changes in the anaerobic threshold in an annual cycle of sport training of young soccer players. Biol Sport 2013; 30:137-43. [PMID: 24744480 PMCID: PMC3944579 DOI: 10.5604/20831862.1044459] [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] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/12/2012] [Indexed: 11/17/2022] Open
Abstract
The aim of the study was to assess changes in the anaerobic threshold of young soccer players in an annual training cycle. A group of highly trained 15-18 year old players of KKS Lech Poznań were tested. The tests included an annual training macrocycle, and its individual stages resulted from the time structure of the sports training. In order to assess the level of exercise capacities of the players, a field exercise test of increasing intensity was carried out on a soccer pitch. The test made it possible to determine the 4 millimolar lactate threshold (T LA 4 mmol · l-1) on the basis of the lactate concentration in blood [LA], to establish the threshold running speed and the threshold heart rate [HR]. The threshold running speed at the level of the 4 millimolar lactate threshold was established using the two-point form of the equation of a straight line. The obtained indicators of the threshold running speed allowed for precise establishment of effort intensity used in individual training in developing aerobic endurance. In order to test the significance of differences in mean values between four dates of tests, a non-parametric Friedman ANOVA test was used. The significance of differences between consecutive dates of tests was determined using a post-hoc Friedman ANOVA test. The tests showed significant differences in values of selected indicators determined at the anaerobic threshold in various stages of an annual training cycle of young soccer players. The most beneficial changes in terms of the threshold running speed were noted on the fourth date of tests, when the participants had the highest values of 4.01 m · s-1 for older juniors, and 3.80 m · s-1 for younger juniors. This may be indicative of effective application of an individualized programme of training loads and of good preparation of teams for competition in terms of players’ aerobic endurance.
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Affiliation(s)
- R Sliwowski
- Department of Team Sports Games of the University School of Physical Education in Poznań, Poland ; KKS Lech Poznań S.A. - Football Club, Poland
| | - M Andrzejewski
- KKS Lech Poznań S.A. - Football Club, Poland ; Department of Theory and Methodology of Physical Recreation, University School of Physical Education in Poznań, Poland
| | - A Wieczorek
- Department of Team Sports Games of the University School of Physical Education in Poznań, Poland
| | - A Barinow-Wojewódzki
- Department of Rehabilitation in Internal Disease, University School of Physical Education in Poznań, Poland
| | - L Jadczak
- Department of Team Sports Games of the University School of Physical Education in Poznań, Poland
| | - S Adrian
- Department of Team Sports Games of the University School of Physical Education in Poznań, Poland
| | - M Pietrzak
- Department of Team Sports Games of the University School of Physical Education in Poznań, Poland
| | - S Wieczorek
- Department of Team Sports Games of the University School of Physical Education in Poznań, Poland
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Frydel JA, Krzystyniak M, Pienkowski D, Pietrzak M, de Sousa Amadeu N, Ratajczyk T, Idzik K, Gutmann T, Tietze D, Voigt S, Fenn A, Limbach HH, Buntkowsky G. Efficient design of multituned transmission line NMR probes: the electrical engineering approach. Solid State Nucl Magn Reson 2011; 39:72-80. [PMID: 21316931 DOI: 10.1016/j.ssnmr.2011.01.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2010] [Revised: 12/26/2010] [Accepted: 01/12/2011] [Indexed: 05/30/2023]
Abstract
Transmission line-based multi-channel solid state NMR probes have many advantages regarding the cost of construction, number of RF-channels, and achievable RF-power levels. Nevertheless, these probes are only rarely employed in solid state-NMR-labs, mainly owing to the difficult experimental determination of the necessary RF-parameters. Here, the efficient design of multi-channel solid state MAS-NMR probes employing transmission line theory and modern techniques of electrical engineering is presented. As technical realization a five-channel ((1)H, (31)P, (13)C, (2)H and (15)N) probe for operation at 7 Tesla is described. This very cost efficient design goal is a multi port single coil transmission line probe based on the design developed by Schaefer and McKay. The electrical performance of the probe is determined by measuring of Scattering matrix parameters (S-parameters) in particular input/output ports. These parameters are compared to the calculated parameters of the design employing the S-matrix formalism. It is shown that the S-matrix formalism provides an excellent tool for examination of transmission line probes and thus the tool for a rational design of these probes. On the other hand, the resulting design provides excellent electrical performance. From a point of view of Nuclear Magnetic Resonance (NMR), calibration spectra of particular ports (channels) are of great importance. The estimation of the π/2 pulses length for all five NMR channels is presented.
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Affiliation(s)
- J A Frydel
- Department of Chemistry, Free University of Berlin, Takustr.3, 14195 Berlin, Germany
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Giebułtowicz J, Dziadek M, Wroczyński P, Woźnicka K, Wojno B, Pietrzak M, Wierzchowski J. Salivary aldehyde dehydrogenase - temporal and population variability, correlations with drinking and smoking habits and activity towards aldehydes contained in food. Acta Biochim Pol 2010. [DOI: 10.18388/abp.2010_2417] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Fluorimetric method based on oxidation of the fluorogenic 6-methoxy-2-naphthaldehyde was applied to evaluate temporal and population variability of the specific activity of salivary aldehyde dehydrogenase (ALDH) and the degree of its inactivation in healthy human population. Analyzed was also its dependence on drinking and smoking habits, coffee consumption, and its sensitivity to N-acetylcysteine. Both the specific activity of salivary ALDH and the degree of its inactivation were highly variable during the day, with the highest activities recorded in the morning hours. The activities were also highly variable both intra- and interpersonally, and negatively correlated with age, and this correlation was stronger for the subgroup of volunteers declaring abstinence from alcohol and tobacco. Moderately positive correlations of salivary ALDH specific activity with alcohol consumption and tobacco smoking were also recorded (r(s) ~0.27; p=0.004 and r(s) =0.30; p=0.001, respectively). Moderate coffee consumption correlated positively with the inactivation of salivary ALDH, particularly in the subgroup of non-drinking and non-smoking volunteers. It was found that mechanical stimulation of the saliva flow increases the specific activity of salivary ALDH. The specific activity of the salivary ALDH was strongly and positively correlated with that of superoxide dismutase, and somewhat less with salivary peroxidase. The antioxidant-containing drug N-acetylcysteine increased activity of salivary ALDH presumably by preventing its inactivation in the oral cavity. Some food-related aldehydes, mainly cinnamic aldehyde and anisaldehyde, were excellent substrates of the salivary ALDH3A1 enzyme, while alkenals, particularly those with short chain, were characterized by lower affinity towards this enzyme but high catalytic constants. The protective role of salivary ALDH against aldehydes in food and those found in the cigarette smoke is discussed, as well as its participation in diminishing the effects of alcohol- and smoking-related oxidative stress.
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Giebułtowicz J, Dziadek M, Wroczyński P, Woźnicka K, Wojno B, Pietrzak M, Wierzchowski J. Salivary aldehyde dehydrogenase - temporal and population variability, correlations with drinking and smoking habits and activity towards aldehydes contained in food. Acta Biochim Pol 2010; 57:361-368. [PMID: 20931090] [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] [Received: 04/12/2010] [Revised: 08/01/2010] [Accepted: 09/03/2010] [Indexed: 05/30/2023]
Abstract
Fluorimetric method based on oxidation of the fluorogenic 6-methoxy-2-naphthaldehyde was applied to evaluate temporal and population variability of the specific activity of salivary aldehyde dehydrogenase (ALDH) and the degree of its inactivation in healthy human population. Analyzed was also its dependence on drinking and smoking habits, coffee consumption, and its sensitivity to N-acetylcysteine. Both the specific activity of salivary ALDH and the degree of its inactivation were highly variable during the day, with the highest activities recorded in the morning hours. The activities were also highly variable both intra- and interpersonally, and negatively correlated with age, and this correlation was stronger for the subgroup of volunteers declaring abstinence from alcohol and tobacco. Moderately positive correlations of salivary ALDH specific activity with alcohol consumption and tobacco smoking were also recorded (r(s) ~0.27; p=0.004 and r(s) =0.30; p=0.001, respectively). Moderate coffee consumption correlated positively with the inactivation of salivary ALDH, particularly in the subgroup of non-drinking and non-smoking volunteers. It was found that mechanical stimulation of the saliva flow increases the specific activity of salivary ALDH. The specific activity of the salivary ALDH was strongly and positively correlated with that of superoxide dismutase, and somewhat less with salivary peroxidase. The antioxidant-containing drug N-acetylcysteine increased activity of salivary ALDH presumably by preventing its inactivation in the oral cavity. Some food-related aldehydes, mainly cinnamic aldehyde and anisaldehyde, were excellent substrates of the salivary ALDH3A1 enzyme, while alkenals, particularly those with short chain, were characterized by lower affinity towards this enzyme but high catalytic constants. The protective role of salivary ALDH against aldehydes in food and those found in the cigarette smoke is discussed, as well as its participation in diminishing the effects of alcohol- and smoking-related oxidative stress.
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Affiliation(s)
- Joanna Giebułtowicz
- Department of Bioanalysis and Drugs Analysis, Faculty of Pharmacy, Medical University of Warsaw, Warszawa, Poland
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Osowski A, Pietrzak M, Wieczorek Z, Wieczorek J. Natural compounds in the human diet and their ability to bind mutagens prevents DNA-mutagen intercalation. J Toxicol Environ Health A 2010; 73:1141-1149. [PMID: 20706936 DOI: 10.1080/15287394.2010.491044] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Human diet may contain many mutagenic or carcinogenic aromatic compounds as well as some beneficial physiologically active dietary components, especially plant food phytochemicals, which act as mutagenesis or carcinogenesis inhibitors. This study compared the binding properties of natural compounds in the human diet (caffeine, theophylline, theobromine, and resveratrol) with a water-soluble derivative of chlorophyll to bind to acridine orange, a known mutagen. An analysis was conducted to determine which substances were effective binding agents and may thus be useful in prevention of chemical-induced mutagenesis and carcinogenesis. Data indicated that in order to bind 50% of the mutagen in a complex, less than twice the concentration of chlorophyllin was needed, the resveratrol concentration was 20-fold higher, while a 1000-fold or even 10,000-fold excess of xanthines were required to bind acridine orange.
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Affiliation(s)
- Adam Osowski
- Department of Physics and Biophysics, University of Warmia and Mazury, Olsztyn, Poland
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Wieczorek J, Pietrzak M, Osowski A, Wieczorek Z. Determination of lead, cadmium, and persistent organic pollutants in wild and orchard-farm-grown fruit in northeastern Poland. J Toxicol Environ Health A 2010; 73:1236-1243. [PMID: 20706949 DOI: 10.1080/15287394.2010.492009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The concentrations of the heavy metals lead (Pb) and cadmium (Cd) were determined in berries (blackberry, raspberry, bilberry, wild strawberry), and hazelnuts picked from plants in the wild as well as in fruit (blackberry, raspberry, blueberry) and hazelnuts picked from orchard-farmed plants in northeastern Poland. The levels of seven congeners of polychlorinated biphenyls (PCB(7)), gamma isomer of hexachlorocyclohexane (gamma-HCH), and sum of dichlorodiphenyl trichloroethane and its metabolites (SigmaDDT) were also measured in plants and nuts. In addition, the concentrations of Pb, Cd, PCB(7,) gamma-HCH, and SigmaDDT were determined in the surface samples of soil from the sites of fruit picking. The highest acceptable concentrations based upon Polish standards for Pb and Cd were not exceeded in forest fruit. In wild berries, Pb occurred at a level below the detection limit, whereas the concentration of Cd ranged from 6 to 49 microg/kg fresh weight. The levels were Cd 72 microg/kg fresh weight and Pb 290 microg/kg fresh weight in raspberries from orchard plants and exceeded the maximal acceptable limit of 50 microg/kg for Cd and 200 microg/kg for Pb. The level of Pb at 210 microg/kg fresh weight in hazelnuts from orchard plants also exceeded maximal acceptable limits. Individual samples of fruit, regardless of their origin, were found to contain trace amounts of organic pollutants such as 1,1-dichloro-2,2-bis(4-chlorophenyl)ethylene (p,p'-DDE) and PCB congeners 101 and 118. All soil samples contained from 3.2 to 14.9 mg/kg dry weight concentrations of Pb and most soil samples also contained Cd. Further, individual soil samples were found to contain high levels of SigmaDDT (145 microg/kg), including p,p'-DDT at a concentration of 67 microg/kg. The concentrations of persistent organic pollutants (POP) in wild and orchard-farm-grown fruit in northeastern Poland were generally below threshold permissible limits, and no correlation was found between levels of contaminants in soils and POP concentrations in fruit.
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Affiliation(s)
- Jolanta Wieczorek
- Department of Commodity Science and Food Analysis, University of Warmia and Mazury, Olsztyn, Poland.
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Bogucka M, Giebułtowicz J, Zawada K, Wroczyński P, Wierzchowski J, Pietrzak M, Piekarczyk P, Romanowska K. The oxidation status of ALDH3A1 in human saliva and its correlation with antioxidant capacity measured by ORAC method. Acta Pol Pharm 2009; 66:477-482. [PMID: 19894643] [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: 05/28/2023]
Abstract
Oxidation status of the salivary aldehyde dehydrogenase (ALDH) was measured in healthy human population using two-assay fluorimetric method and compared with antioxidant capacity (ORAC) in non-smoking and heavy smokers group. Influence of high or low antioxidant diet was also examined. Except for the group of smokers, the salivary ALDH oxidation degree in human saliva was not correlated with antioxidant capacity. Simultaneously direct administration of the antioxidant-containing drug, Fluimucil, resulted in short-term, but statistically significant increase of the reduced (active) form of the enzyme, presumably due to a radical-scavenging activity of the drug.
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Affiliation(s)
- Małgorzata Bogucka
- Department of Drugs Analysis, Faculty of Pharmacy, Medical University of Warsaw, 1 Banacha St., PL-02097 Warsaw, Poland
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Giebułtowicz J, Wolinowska R, Sztybor A, Pietrzak M, Wroczyński P, Wierzchowski J. Salivary aldehyde dehydrogenase: activity towards aromatic aldehydes and comparison with recombinant ALDH3A1. Molecules 2009; 14:2363-72. [PMID: 19633610 PMCID: PMC6254923 DOI: 10.3390/molecules14072363] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2009] [Revised: 06/15/2009] [Accepted: 06/18/2009] [Indexed: 11/16/2022] Open
Abstract
A series of aromatic aldehydes was examined as substrates for salivary aldehyde dehydrogenase (sALDH) and the recombinant ALDH3A1. Para-substituted benzaldehydes, cinnamic aldehyde and 2-naphthaldehydes were found to be excellent substrates, and kinetic parameters for both salivary and recombinant ALDH were nearly identical. It was demonstrated that for the fluorogenic naphthaldehydes the only produced reaction product after incubation in saliva is the carboxylate.
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Affiliation(s)
- Joanna Giebułtowicz
- Department of Drugs Analysis, Faculty of Pharmacy, Medical University of Warsaw, 1 Banacha Street, PL-02-097, Warsaw, Poland; E-mail: (J.G.)
| | - Renata Wolinowska
- Department of Pharmaceutical Microbiology, Faculty of Pharmacy, Medical University of Warsaw, 3 Oczki Street, PL-02-007, Warsaw, Poland; E-mail: (R.W.)
| | - Anna Sztybor
- Department of Biophysics, University of Warmia and Mazury, 4 Oczapowskiego St., PL-10-719 Olsztyn, Poland
| | - Monika Pietrzak
- Department of Biophysics, University of Warmia and Mazury, 4 Oczapowskiego St., PL-10-719 Olsztyn, Poland
| | - Piotr Wroczyński
- Department of Drugs Analysis, Faculty of Pharmacy, Medical University of Warsaw, 1 Banacha Street, PL-02-097, Warsaw, Poland; E-mail: (J.G.)
| | - Jacek Wierzchowski
- Department of Biophysics, University of Warmia and Mazury, 4 Oczapowskiego St., PL-10-719 Olsztyn, Poland
- Author to whom correspondence should be addressed; E-Mail: ; Tel. +48-89-523-3324; Fax: +48-89-523-3408
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Wierzchowski J, Pietrzak M, Stepinski J, Jemielity J, Kalek M, Bojarska E, Jankowska-Anyszka M, Davis RE, Darzynkiewicz E. Kinetics of C. elegans DcpS cap hydrolysis studied by fluorescence spectroscopy. Nucleosides Nucleotides Nucleic Acids 2008; 26:1211-5. [PMID: 18066754 DOI: 10.1080/15257770701527968] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
DcpS (scavenger decapping enzyme) from nematode C. elegans readily hydrolyzes both monomethyl- and trimethylguanosine cap analogues. The reaction was followed fluorimetrically. The marked increase of fluorescence intensity after the cleavage of pyrophosphate bond in dinucleotides was used to determine K(m) and V(max)values. Kinetic parameters were similar for both classes of substrates and only slightly dependent on pH. The hydrolysis was strongly inhibited by methylene cap analogues (m(7)Gp(CH(2))ppG and m(7)Gpp(CH(2))pG) and less potently by ARCA (m(7,3' O)GpppG).
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Affiliation(s)
- J Wierzchowski
- Department of Biophysics, University of Warmia and Mazury, 4 Oczapowskiego, Olsztyn, Poland.
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Wierzchowski J, Pietrzak M, Szelag M, Wroczyński P. Salivary aldehyde dehydrogenase--reversible oxidation of the enzyme and its inhibition by caffeine, investigated using fluorimetric method. Arch Oral Biol 2007; 53:423-8. [PMID: 18154860 DOI: 10.1016/j.archoralbio.2007.11.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2007] [Revised: 09/19/2007] [Accepted: 11/09/2007] [Indexed: 11/15/2022]
Abstract
OBJECTIVE We have applied fluorimetric method to monitor aldehyde dehydrogenase (ALDH*) activity in human saliva samples to study inactivation, reactivation and inhibition of the enzyme. DESIGN Saliva samples were collected to buffer stock solution, containing various thiols, and assayed in the presence of the fluorogenic substrate 6-dimethylamino-2-naphthaldehyde and NAD(+). Fluorescence of the produced 6-dimethylamino-2-naphthalene carboxylate was used to measure the reaction rate. RESULTS Kinetic parameters for the highly fluorogenic substrate, 6-dimethylamino-2-naphthaldehyde were measured, with apparent K(m) of 7.9 microM at pH 7.3. The apparent K(m) for NAD(+) was 1.2 microM. The observed ALDH activity is unstable in the absence of thiols, but can be stabilized by 1mM glutathione, and inactivated enzyme can be re-activated within 10 min by treatment of 0.5 mM DTT. Two-assay procedure was applied to measure degree of inactivation of ALDH in saliva samples. It was found that degree of ALDH inactivation in fresh samples, stabilized by glutathione, is between 0% and 90%, with average value ca. 40%. Caffeine and theophylline were shown to be moderate inhibitors of salivary ALDH. CONCLUSIONS Oxidation of the salivary ALDH in fresh saliva may be reliably measured using fluorimetric two-assay procedure. Preliminary statistics indicate that in most individuals this enzyme is partially inactive. Inhibition of the salivary ALDH by caffeine may have consequences for nutrition safety.
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Affiliation(s)
- Jacek Wierzchowski
- Department of Biophysics, University of Warmia and Mazury, 4 Oczapowskiego Street, PL-10-719 Olsztyn, Poland.
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32
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Pietrzak M, Wieczorek Z, Wieczorek J, Darzynkiewicz Z. The "interceptor" properties of chlorophyllin measured within the three-component system: intercalator-DNA-chlorophyllin. Biophys Chem 2006; 123:11-9. [PMID: 16650923 PMCID: PMC3488280 DOI: 10.1016/j.bpc.2006.03.018] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2006] [Revised: 03/28/2006] [Accepted: 03/30/2006] [Indexed: 10/24/2022]
Abstract
In aqueous solutions, in the presence of double-stranded DNA, chlorophyllin (CHL) forms complexes with each of the three DNA intercalators: acridine orange (AO), quinacrine mustard (QM), and doxorubicin (DOX). The evidence for these interactions was obtained by measurement changes in the absorption and fluorescence spectra of the mixtures containing DNA and intercalators during titration with CHL. A model of simple competition between DNA and CHL for the intercalator was used to define the measured interactions. The concentrations of the complexes estimated based on this model were consistent with the concentrations obtained by actual measurement of the absorption spectra. The present data provide further support for the role of chlorophyllin as an "interceptor" that may neutralize biological activity of aromatic compounds including mutagens and antitumor drugs.
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Affiliation(s)
- Monika Pietrzak
- Department of Physics and Biophysics, University of Warmia and Mazury in Olsztyn, Oczapowskiego 4, 10-719 Olsztyn, Poland
| | - Zbigniew Wieczorek
- Department of Physics and Biophysics, University of Warmia and Mazury in Olsztyn, Oczapowskiego 4, 10-719 Olsztyn, Poland
- Corresponding author: Tel./fax: +48 89 523 45 47. (Z. Wieczorek)
| | - Jolanta Wieczorek
- Department of Commodities and Food Research, University of Warmia and Mazury in Olsztyn, Cieszyński Square 1, 10-726 Olsztyn, Poland
| | - Zbigniew Darzynkiewicz
- Brander Cancer Research Institute at New York Medical College, Hawthorne, NY, 10532, USA
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33
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Stachelska A, Wieczorek Z, Ruszczyńska K, Stolarski R, Pietrzak M, Lamphear BJ, Rhoads RE, Darzynkiewicz E, Jankowska-Anyszka M. Interaction of three Caenorhabditis elegans isoforms of translation initiation factor eIF4E with mono- and trimethylated mRNA 5' cap analogues. Acta Biochim Pol 2003; 49:671-82. [PMID: 12422237] [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] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2002] [Revised: 08/12/2002] [Accepted: 08/26/2002] [Indexed: 02/27/2023]
Abstract
Translation initiation factor eIF4E binds the m(7)G cap of eukaryotic mRNAs and mediates recruitment of mRNA to the ribosome during cap-dependent translation initiation. This event is the rate-limiting step of translation and a major target for translational control. In the nematode Caenorhabditis elegans, about 70% of genes express mRNAs with an unusual cap structure containing m(3)(2,2,7)G, which is poorly recognized by mammalian eIF4E. C. elegans expresses five isoforms of eIF4E (IFE-1, IFE-2, etc.). Three of these (IFE-3, IFE-4 and IFE-5) were investigated by means of spectroscopy and structural modelling based on mouse eIF4E bound to m(7)GDP. Intrinsic fluorescence quenching of Trp residues in the IFEs by iodide ions indicated structural differences between the apo and m(7)G cap bound proteins. Fluorescence quenching by selected cap analogues showed that only IFE-5 forms specific complexes with both m(7)G- and m(3)(2,2,7)G-containing caps (K(as) 2 x 10(6) M(-1) to 7 x 10(6) M(-1)) whereas IFE-3 and IFE-4 discriminated strongly in favor of m(7)G-containing caps. These spectroscopic results quantitatively confirm earlier qualitative data derived from affinity chromatography. The dependence of K(as) on pH indicated optimal cap binding of IFE-3, IFE-4 and IFE-5 at pH 7.2, lower by 0.4 pH units than that of eIF4E from human erythrocytes. These results provide insight into the molecular mechanism of recognition of structurally different caps by the highly homologous IFEs.
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Affiliation(s)
- Alicja Stachelska
- Department of Physics and Biophysics, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland
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34
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Pietrzak M, Wieczorek Z, Stachelska A, Darzynkiewicz Z. Interactions of chlorophyllin with acridine orange, quinacrine mustard and doxorubicin analyzed by light absorption and fluorescence spectroscopy. Biophys Chem 2003; 104:305-13. [PMID: 12834849 PMCID: PMC3480723 DOI: 10.1016/s0301-4622(02)00387-3] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The present study was designed to estimate the ability of chlorophyllin (CHL) to interact with two acridine mutagens, quinacrine mustard (QM) and acridine orange (AO), and with the antitumor anthracycline doxorubicin (Dox). To this end, aqueous solutions of QM, AO or Dox during titration with CHL were subjected to spectrophotometry and spectrofluorimetry to detect possible interactions between these reagents. The data indicate that CHL forms complexes with AO, QM or Dox in these solutions. The presence of the complexes was manifested by a bathochromic shift of the absorption spectra, as well as by strong quenching of the fluorescence of each of these mutagens in the presence of CHL. CHL, thus, may serve as an interceptor of these mutagenic acridines in different in vivo or in vitro applications. Its ability to interact with Dox may potentially be utilized to detoxify patients overdosed with this or similar drugs.
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Affiliation(s)
- Monika Pietrzak
- Department of Physics and Biophysics, University of Warmia and Mazury in Olsztyn, Oczapowskiego 4, 10-719 Olsztyn, Poland
| | - Zbigniew Wieczorek
- Department of Physics and Biophysics, University of Warmia and Mazury in Olsztyn, Oczapowskiego 4, 10-719 Olsztyn, Poland
- Corresponding author. Tel./fax: +48-89-523-4547. (Z. Wieczorek)
| | - Alicja Stachelska
- Department of Physics and Biophysics, University of Warmia and Mazury in Olsztyn, Oczapowskiego 4, 10-719 Olsztyn, Poland
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35
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Stukan M, Debniak J, Pietrzak M. CANCER ANTIGEN 125 IN OVARIAN CARINOMA. Int J Gynecol Cancer 2003. [DOI: 10.1136/ijgc-00009577-200303001-00193] [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] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
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36
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Stachelska A, Wieczorek Z, Ruszczyńska K, Stolarski R, Pietrzak M, Lamphear BJ, Rhoads RE, Darzynkiewicz E, Jankowska-Anyszka M. Interaction of three Caenorhabditis elegans isoforms of translation initiation factor eIF4E with mono- and trimethylated mRNA 5' cap analogues. Acta Biochim Pol 2002. [DOI: 10.18388/abp.2002_3776] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Translation initiation factor eIF4E binds the m(7)G cap of eukaryotic mRNAs and mediates recruitment of mRNA to the ribosome during cap-dependent translation initiation. This event is the rate-limiting step of translation and a major target for translational control. In the nematode Caenorhabditis elegans, about 70% of genes express mRNAs with an unusual cap structure containing m(3)(2,2,7)G, which is poorly recognized by mammalian eIF4E. C. elegans expresses five isoforms of eIF4E (IFE-1, IFE-2, etc.). Three of these (IFE-3, IFE-4 and IFE-5) were investigated by means of spectroscopy and structural modelling based on mouse eIF4E bound to m(7)GDP. Intrinsic fluorescence quenching of Trp residues in the IFEs by iodide ions indicated structural differences between the apo and m(7)G cap bound proteins. Fluorescence quenching by selected cap analogues showed that only IFE-5 forms specific complexes with both m(7)G- and m(3)(2,2,7)G-containing caps (K(as) 2 x 10(6) M(-1) to 7 x 10(6) M(-1)) whereas IFE-3 and IFE-4 discriminated strongly in favor of m(7)G-containing caps. These spectroscopic results quantitatively confirm earlier qualitative data derived from affinity chromatography. The dependence of K(as) on pH indicated optimal cap binding of IFE-3, IFE-4 and IFE-5 at pH 7.2, lower by 0.4 pH units than that of eIF4E from human erythrocytes. These results provide insight into the molecular mechanism of recognition of structurally different caps by the highly homologous IFEs.
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37
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Grech E, Klimkiewicz J, Nowicka-Scheibe J, Pietrzak M, Schilf W, Pozharski A, Ozeryanskii V, Bolvig S, Abildgaard J, Hansen P. Deuterium isotope effects on 15N, 13C and 1H chemical shifts of proton sponges. J Mol Struct 2002. [DOI: 10.1016/s0022-2860(02)00216-8] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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38
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Pietrzak M, Wehling J, Limbach HH, Golubev NS, López C, Claramunt RM, Elguero J. 13C detected scalar nitrogen-nitrogen couplings across the intramolecular symmetric NHN hydrogen bond of proton sponge. J Am Chem Soc 2001; 123:4338-9. [PMID: 11457202 DOI: 10.1021/ja005890x] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- M Pietrzak
- Institut für Chemie der Freien Universität Berlin, Takustrasse 3, D-14195, Berlin, Germany
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39
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Pietrzak M. Neurodevelopmental rehabilitation according to Glenn Doman (the Philadelphia Neurodevelopment Method). Ortop Traumatol Rehabil 2001; 3:535-537. [PMID: 17984911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Neurodevelopmental rehabilitation methods for children with nonprogressive brain injury began to take shape in the late 1940s in the US and Europe. One of the most important centers continuously involved in promoting neurodevelopmental concepts is the Institute for the Achievement of Human Potential. The method of child neurodevelopment is based on the theory of neurological organization. In practice this global method seeks to provide the child's brain with ordered information suitable for his or her present level of development, with increasing duration, frequency, and intensity. As is the case with other rehabilitation methods, the theoretical foundations and clinical efficacy of these rehabilitation techniques have not yet been adequately documented, which has been pointed out by the numerous critics of these methods.
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Affiliation(s)
- M Pietrzak
- Wielkopolskie Centrum Neurologii Dzieci i Młodziezy, Poznań
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40
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Gurda B, Kluczyński A, Pietrzak M, Steinborn B, Toczko A, Wigowska-Sowińska J, Zgorzalewicz M, Zielińska M. [Diagnostic value of sleep deprivation as the EEG activation method in diagnosis of epilepsy in developmental age]. Neurol Neurochir Pol 2000; 34 Suppl 1:67-75. [PMID: 10768147] [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: 02/16/2023]
Abstract
The paper presented the significance of EEG activation in diagnosing epilepsy in children and adolescents. EEG records of 108 patients between 3-19 years of age with the occurrence of various types of paroxysmal disorders who were admitted to Chair and Department of Developmental Neurology University of Medical Sciences in Poznań were analysed. Standard EEG was administered to all children twice: the first examination at rest with hyperventilation (HV) and photostimulation (FS) and the second one after total or partial sleep deprivation (DS). At awaking state normal records were stated in 57% of cases, in 15% paroxysmal changes in HV or FS appeared, in the rest of cases (28%) generalised paroxysmal disorders, localised changes, lateralised or diffused were noted. Among EEG activation methods DS occurred to be the most effective after it, 52 patients (48%) were diagnosed for generalised paroxysmal changes, 20% for localised, 3% lateralised and for 6% for diffused changes. Normal EEG were recorded in 22% of examined children and adolescents. The epilepsy were diagnosed in 59 (55%) of patients mostly with generalised seizures (28) partial secondarily generalised (16) and partially complex (11). In 49 (45%) children were diagnosed with other paroxysmal disorders.
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Affiliation(s)
- B Gurda
- Katedra i Klinika Neurologii Wieku Rozwojowego Akademii Medycznej im. K. Marcinkowskiego w Poznaniu
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41
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Czekanowski R, Pietrzak M, Kukulski P. [Correlation between oncologically suspicious cytologic smears and colposcopic images of the uterine cervix and results of histopathologic examination taken from material provided by the Gynecology Department of the Pruszkow Municipal Hospital from 1995 to 1997]. Przegl Lek 1999; 56:48-50. [PMID: 10375926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
Abstract
The objective of the paper was an evaluation of relationship between oncologically suspicious cytologic smear and colposcopic images, and the results of histopathological examination of samples collected from the vaginal portion of uterine cervix and from cervical canal scrapings. The material consisted of 60 patients with cytologic group 3 and 13 patients with group 4 and 5 according to Papanicolaou, who had been selected during a two-year preventive examination period. Cytologic group 3 patients (group 1) were subjected to cytological assessment and colposcopic examination again in order to determine further diagnostic indications. Cytologic group 4 and 5 women (group 2) were collected samples from the vaginal portion of uterine cervix under colposcopic supervision, without waiting for the result of cytologic re-assessment. All these patients were also collected samples from the vaginal portion of uterine cervix. In patients of cytologic group 3 the cytologic and colposcopic examination results were found to be compatible with histopathologic examination results in 53.3% cases. In patients of cytologic group 4 or 5 this factor was established at 92.3%.
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Affiliation(s)
- R Czekanowski
- Oddziału Ginekologiczno-Połozniczego Szpitala Miejskiego w Pruszkowie
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42
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Kowalski ML, Pawliczak R, Woźniak J, Siuda K, Grzegorczyk J, Pietrzak M, Kozłowski Z, Marek K. Culture of human nasal epithelial cells from nasal polyps on collagen matrix. Arch Immunol Ther Exp (Warsz) 1998; 46:51-7. [PMID: 9510947] [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: 02/06/2023]
Abstract
Epithelial cell cultures became an experimental model employed for both animal and human studies. We established a modified method of culture of human nasal epithelial cells from nasal polyps using serum-free, hormonally supplemented Ham's F-12 medium and Vitrogen 100 collagen matrix. Cells reached confluent monolayer structures in 5 to 7 days (mean time 6 +/- 0.89 days) of culture. The confluent cultures consisted of pure epithelial cells, which was confirmed by light and electron microscopy, and immunohistochemical staining with anticytokeratin antibody. The success ratio of cultures was 61.5%. The culture system described is efficient enough to provide pure epithelial cells for further functional studies.
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Affiliation(s)
- M L Kowalski
- Department of Clinical Immunology and Allergy, University Medical School, Lódź, Poland
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43
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Pietrzak M, Czekanowski R, Koszarski M, Nowosielska B. [A case of Potter syndrome in a male newborn infant]. Ginekol Pol 1997; 68:633-5. [PMID: 9686475] [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: 02/08/2023] Open
Abstract
The Potter syndrome was discussed based on the reference materials. The aim of the work is to present the course of pregnancy of 19-year-old nullipara ended by the delivery of male newborn with signs of above described syndrome.
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Affiliation(s)
- M Pietrzak
- Oddziału Ginekologiczno-Połozniczego, Szpitala Miejskiego w Pruszkowie
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44
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Pietrzak M, Greaser ML, Sosnicki AA. Effect of rapid rigor mortis processes on protein functionality in pectoralis major muscle of domestic turkeys. J Anim Sci 1997; 75:2106-16. [PMID: 9263058 DOI: 10.2527/1997.7582106x] [Citation(s) in RCA: 135] [Impact Index Per Article: 5.0] [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: 02/05/2023] Open
Abstract
The pale, soft, exudative (PSE) phenomenon in turkey pectoralis major (breast) muscle was studied using a combination of biochemical, meat quality, microscopic, and gel electrophoresis techniques. Breast muscle samples were collected from turkeys characterized by slow vs fast postmortem glycolysis assessed by muscle pH at 20 min after death. The PSE group was characterized by lower muscle ATP (P < .05) and higher lactate levels (P < .05) compared with the normal group. Excess water-holding capacity and cooking yield were significantly lower (P < .05) in the PSE group than in normal turkeys. Breast muscle of the PSE group was also lighter (P < .05) than that in the normal group as determined by Minolta L* values. The SDS-PAGE, Western blotting, and immunofluorescence microscopy revealed that phosphorylase, a soluble enzyme, became tightly associated with the myofibrils in muscle from the PSE group. Also, less myosin could be solubilized from PSE vs normal myofibril samples. The results indicate that irreversible myosin insolubility due to low pH and high-temperature conditions is decisive in the development of PSE turkey breast muscle.
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Affiliation(s)
- M Pietrzak
- Department of Animal Sciences, University of Wisconsin-Madison 53706, USA
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45
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Abstract
There are physiologic and logistic concerns involved in caring for patients with inflight emergencies. This article presents the physiologic changes that occur at altitude, the types of medical problems that can be encountered, and management strategies. An overview is also presented of the medical training of flight attendants and the medical equipment that is available on commercial aircraft.
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Affiliation(s)
- A Jagoda
- Mount Sinai School of Medicine, New York, New York, USA
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46
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47
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Cordeiro MC, Xue ZT, Pietrzak M, Pais MS, Brodelius PE. Plant aspartic proteinases from Cynara cardunculus spp. flavescens cv. cardoon; nucleotide sequence of a cDNA encoding cyprosin and its organ-specific expression. Adv Exp Med Biol 1995; 362:367-72. [PMID: 8540345 DOI: 10.1007/978-1-4615-1871-6_48] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- M C Cordeiro
- Departamento de Biologia, Universidade de Evora, Portugal
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Cordeiro MC, Xue ZT, Pietrzak M, Pais MS, Brodelius PE. Isolation and characterization of a cDNA from flowers of Cynara cardunculus encoding cyprosin (an aspartic proteinase) and its use to study the organ-specific expression of cyprosin. Plant Mol Biol 1994; 24:733-741. [PMID: 8193298 DOI: 10.1007/bf00029855] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Poly(A)+ RNA isolated from flower buds of Cynara cardunculus has been used to prepare a cDNA library. Screening of the cDNA after expression of cloned DNA with antibodies raised against the large subunit of cyprosin 3 resulted in the isolation of six positive clones. One of these clones (cypro1s; a 1.7 kb Eco RI fragment) codes for cyprosin. The nucleotide sequence contain a 1419 bp open reading frame coding for 473 amino acids (aa) including a putative full-length mature protein (440 aa) and a partial prosequence (33 aa). Cypro1s contains a 162 bp 3' non-coding region followed by a poly(A) tail. The deduced amino acid sequence shows high homology to other plant aspartic proteinases. The homology to mammalian and microbial aspartic proteinases is somewhat lower. Plant aspartic proteinases contain an insert of around 100 aa. We are modelling where this plant-specific insert will appear in the structure of cyprosin. Using cypro1s as a probe in northern blot analysis, the expression of cyprosin in developing flowers and other tissues has been studied. The signal on the northern blot increased for RNA samples from early (flower buds 6 mm in length) to later stages of floral development (flower buds up to 40 mm in length). In late stages of floral development (open flowers 50 mm in length and styles from such flowers) no hybridization signal was visualized showing that the synthesis of mRNA encoding the cyprosin starts in early stages of floral development and switches off at maturation of the flower.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- M C Cordeiro
- Departamento Biologia Vegetal FCL, Lisboa, Portugal
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Neuhaus JM, Pietrzak M, Boller T. Mutation analysis of the C-terminal vacuolar targeting peptide of tobacco chitinase: low specificity of the sorting system, and gradual transition between intracellular retention and secretion into the extracellular space. Plant J 1994; 5:45-54. [PMID: 8130797 DOI: 10.1046/j.1365-313x.1994.5010045.x] [Citation(s) in RCA: 26] [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] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
The C-terminal propeptide of tobacco (Nicotiana tabacum) chitinase A has been shown to be necessary and sufficient for targeting of chitinases to the plant vacuole. The sequence specificity of this vacuolar targeting peptide (VTP) has now been analysed using transient expression of chitinases in Nicotiana plumbaginifolia protoplasts. An extracellular cucumber chitinase, previously used as a secreted reporter protein in transgenic tobacco, was also secreted into the incubation medium by the transiently transformed protoplasts. Addition of six to seven amino acids at the C-terminus to generate the VTP of tobacco chitinase A were sufficient to cause retention of most of the cucumber chitinase within the protoplasts. The chitinase A itself, as well as a mutant lacking the N-terminal chitin-binding domain, were retained to 80% in the protoplasts when low concentrations of the plasmid were used in the transient expression system. At high concentrations of plasmid, causing high levels of transiently expressed chitinase, retention was reduced, indicating saturation of the sorting system. Deletion of the C-terminal methionine did not affect the intracellular location, but deletion of even a single internal amino acid of the VTP caused predominantly secretion of tobacco chitinase A. In contrast, exchanges of amino acids in the VTP as well as substitution of the VTP with random sequences had intermediary effects that covered the whole range from retention to secretion. The results suggest that the sorting system responsible for the diversion of secretory proteins to the vacuole has a low specificity for the sequence of C-terminal targeting peptides, and that sequence changes in the VTP allow a gradual transition from vacuolar retention to secretion.
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Affiliation(s)
- J M Neuhaus
- Botanisches Institut, Universität Basel, Switzerland
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Jagoda A, Pietrzak M, Hazen S, Vayer J. Prehospital care and the military. Mil Med 1992; 157:11-5. [PMID: 1603369] [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: 12/27/2022] Open
Abstract
Significant evolution has occurred in prehospital care over the past decade. Civilian emergency medical service (EMS) systems have become progressively sophisticated. Military systems have tended to maintain a wartime philosophy toward prehospital care, and thus its peacetime ambulance service, at times, is not prepared to provide the same standard of care given by the civilian community. This article reviews the current status of civilian and military EMS and attempts to put in perspective the directions that the military could go to improve on the prehospital care it provides.
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Affiliation(s)
- A Jagoda
- Department of Military Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD 20814-4799
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