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Mondal S, Bagchi B. Ion diffusion captures composition-dependent anomalies in water-DMSO binary mixtures. J Chem Phys 2024; 160:114505. [PMID: 38506289 DOI: 10.1063/5.0189259] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Accepted: 03/01/2024] [Indexed: 03/21/2024] Open
Abstract
Aqueous dimethyl sulfoxide (Aq-DMSO) binary mixture exhibits many fascinating composition-dependent anomalies that are explained by using the peculiarities of the water-DMSO hydrogen bond. Ions can couple strongly to these composition-dependent anomalies to produce exotic dynamics of their own. We carry out theoretical studies using computer simulations to understand the structural and dynamical aspects of rigid monovalent cations (Li+, Na+, K+, Rb+, and Cs+) in aqueous DMSO solutions, with chloride as the counterion. We uncover a number of composition-dependent ion diffusion anomalies, which can be traced back to the interplay between the size-dependent charge density of the ion and the resulting difference in interactions of the ion with water and DMSO molecules. Size and composition dependence of the diffusion coefficients of the five ions exhibit fascinating variations that can be explained partially.
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Affiliation(s)
- Sangita Mondal
- SSCU, Indian Institute of Science, Bangalore 560012, India
| | - Biman Bagchi
- SSCU, Indian Institute of Science, Bangalore 560012, India
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2
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Karim M, Boikess RS, Schwartz RA, Cohen PJ. Dimethyl sulfoxide (DMSO): a solvent that may solve selected cutaneous clinical challenges. Arch Dermatol Res 2023; 315:1465-1472. [PMID: 36459193 DOI: 10.1007/s00403-022-02494-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Revised: 11/18/2022] [Accepted: 11/28/2022] [Indexed: 12/04/2022]
Abstract
Dimethyl sulfoxide (DMSO) is a clear, odorless liquid, inexpensively produced as a by-product of the wood pulp industry. DMSO's unique chemical properties allow for its broad applications in a wide variety of cutaneous challenges. Widely available in the USA as a solvent, DMSO is FDA-approved only for the treatment of interstitial cystitis and for use as a preservative for organ transplant. DMSO readily penetrates and diffuses through biological membranes. At low concentrations, DMSO exhibits anti-inflammatory, analgesic, diuretic, vasodilator, anti-platelet aggregation, radio-protective, and muscle-relaxing properties. DMSO is also a vigorous scavenger of hydroxyl free radicals, which may explain its observed beneficial effects on skin rejuvenation and recovery from thermal injury. DMSO has a relatively low level of toxicity. DMSO has shown promise in the off-label treatment of basal cell carcinoma, pressure ulcers, scleroderma, herpes simplex, cutaneous fungal infections, and amyloidosis. The potential of DMSO to serve as an independent or adjuvant topical treatment for these conditions is explored in this review.
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Affiliation(s)
- Maria Karim
- Hackensack Meridian School of Medicine, Nutley, NJ, USA
| | - Robert S Boikess
- Department of Chemistry and Chemical Biology, Rutgers University New Brunswick, 123 Bevier Rd, Piscataway, NJ, 08854, USA
| | - Robert A Schwartz
- Dermatology, Rutgers-New Jersey Medical School, 185 South, Orange Avenue, Newark, NJ, 07103-2714, USA.
| | - Philip J Cohen
- Dermatology, Rutgers-New Jersey Medical School, 185 South, Orange Avenue, Newark, NJ, 07103-2714, USA
- Dermatology, VA New Jersey Health Care System, East Orange, NJ, USA
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Chakrabarty S, Barman A, Ghosh A. Anomalous Infrared Absorbance of S═O: A Perturbation Study of α-C-H/D. J Phys Chem B 2022; 126:5490-5496. [PMID: 35852454 DOI: 10.1021/acs.jpcb.2c01374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Solvatochromic shifts of S═O vibrational probes describe the strength of the surrounding electric fields and the hydrogen bonding status. Herein, we demonstrated how the solvents alter the infrared (IR) spectra of the S═O vibrating mode. The experimental measurement of the involvement of α-H/D isotopic interactions with different solvents and their effects on the IR absorbance spectra of the vibrational probe provides detailed knowledge of the microsolvation environment despite the complexity of overlapping bands in the spectra. Herein, we discover how the solvents interact differently with DMSO and DMSO-d6, while being electronically and structurally the same. Interestingly, the IR spectrum of the S═O mode remains unaltered during α-isotopic replacement in the presence of aprotic solvents (acetone, acetonitrile, and dichloromethane), but in strongly coordinating polar solvents (D2O), it is altered remarkably. There is a lack of quantitative information about the influence of the α-H atom or α-isotopic substitution on the vibrational probe in the literature. Our experiments provide a detailed molecular understanding of the structure of DMSO in DMSO-solvent binary mixtures. As DMSO plays an important role in virtually all subdisciplines of chemistry and biology, we believe that our work will be of interest to a large diversity of studies in these fields.
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Affiliation(s)
- Suranjana Chakrabarty
- Department of Condensed Matter Physics and Materials Sciences, S. N. Bose National Centre for Basic Sciences, Kolkata 700106, India
| | - Anjan Barman
- Department of Condensed Matter Physics and Materials Sciences, S. N. Bose National Centre for Basic Sciences, Kolkata 700106, India
| | - Anup Ghosh
- Department of Condensed Matter Physics and Materials Sciences, S. N. Bose National Centre for Basic Sciences, Kolkata 700106, India
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Gusso D, Cruz FF, Fritsch PM, da Silva Gobbo MO, Morrone FB, Bonan CD. Pannexin channel 1, P2X7 receptors, and Dimethyl Sulfoxide mediate pain responses in zebrafish. Behav Brain Res 2022; 423:113786. [DOI: 10.1016/j.bbr.2022.113786] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Revised: 01/19/2022] [Accepted: 02/01/2022] [Indexed: 12/15/2022]
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Yoshimura N, Uno T, Sasaki M, Ohinata A, Nawata S, Ueda T. The O'Leary-Sant Interstitial Cystitis Symptom Index is a clinically useful indicator of treatment outcome in patients with interstitial cystitis/bladder pain syndrome with Hunner lesions: A post hoc analysis of the Japanese phase III trial of KRP-116D, 50% dimethyl sulfoxide solution. Int J Urol 2021; 29:289-296. [PMID: 34929761 PMCID: PMC9300131 DOI: 10.1111/iju.14765] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Accepted: 11/28/2021] [Indexed: 11/29/2022]
Abstract
OBJECTIVES To evaluate the efficacy of intravesical KRP-116D, 50% dimethyl sulfoxide solution, in interstitial cystitis/bladder pain syndrome patients with Hunner lesions (Hunner-type interstitial cystitis), and to evaluate the correlations between efficacy variables and global response assessment to determine what constitutes a minimal clinically important change. METHODS We performed a post hoc analysis of the Japanese phase III trial of KRP-116D. Changes at Week 12 from baseline in objective and subjective outcomes were compared between the KRP-116D and placebo groups in Hunner-type interstitial cystitis or non-Hunner-type interstitial cystitis patients. Correlations between efficacy variables at Week 12 and global response assessment were analyzed. Area under the receiver operating characteristic curve and the cut-off value of efficacy valuables were calculated to determine clinically meaningful changes. RESULTS The effectiveness of intravesical treatment with KRP-116D was demonstrated in Hunner-type interstitial cystitis, but not in non-Hunner-type interstitial cystitis patients. Global response assessment was closely correlated with subjective outcomes including O'Leary-Sant Interstitial Cystitis Symptom Index, O'Leary-Sant Interstitial Cystitis Problem Index, and a numeric rating scale for bladder pain, but was less correlated with voiding variables including micturition frequency, voided volume, and maximum voided volume. In the receiver operating characteristic curve analyses, the cut-off value for the O'Leary-Sant Interstitial Cystitis Symptom Index was -5 (sensitivity 81.3%, specificity 83.3%). CONCLUSIONS Clinical benefit of intravesical KRP-116D in Hunner-type interstitial cystitis patients was confirmed in this post hoc analysis. A five-point reduction in O'Leary-Sant Interstitial Cystitis Symptom Index is a clinically meaningful indicator for assessing patient satisfaction with KRP-116D treatment in patients with Hunner-type interstitial cystitis.
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Affiliation(s)
- Naoki Yoshimura
- Department of Urology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA.,Department of Urology, Ueda Clinic, Kyoto, Japan
| | - Takashi Uno
- Clinical Development Center, Kyorin Pharmaceutical Co., Ltd., Tokyo, Japan
| | - Mitsuru Sasaki
- Clinical Development Center, Kyorin Pharmaceutical Co., Ltd., Tokyo, Japan
| | - Akira Ohinata
- Clinical Development Center, Kyorin Pharmaceutical Co., Ltd., Tokyo, Japan
| | - Shigeki Nawata
- Clinical Development Center, Kyorin Pharmaceutical Co., Ltd., Tokyo, Japan
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Yoshimura N, Homma Y, Tomoe H, Otsuka A, Kitta T, Masumori N, Akiyama Y, Niimi A, Mitsui T, Nanri M, Namima T, Takei M, Yamaguchi A, Sekiguchi Y, Kajiwara M, Kobayashi S, Ameda K, Ohashi Y, Sakamoto S, Muraki O, Shishido T, Kageyama S, Kokura K, Okazoe H, Yamanishi T, Watanabe T, Uno T, Ohinata A, Ueda T. Efficacy and safety of intravesical instillation of KRP-116D (50% dimethyl sulfoxide solution) for interstitial cystitis/bladder pain syndrome in Japanese patients: A multicenter, randomized, double-blind, placebo-controlled, clinical study. Int J Urol 2021; 28:545-553. [PMID: 33580603 PMCID: PMC8247858 DOI: 10.1111/iju.14505] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Accepted: 12/22/2020] [Indexed: 12/24/2022]
Abstract
Objective To evaluate the efficacy and safety of intravesical KRP‐116D, 50% dimethyl sulfoxide solution compared with placebo, in interstitial cystitis/bladder pain syndrome patients. Methods Japanese interstitial cystitis/bladder pain syndrome patients with an O’Leary‐Sant Interstitial Cystitis Symptom Index score of ≥9, who exhibited the bladder‐centric phenotype of interstitial cystitis/bladder pain syndrome diagnosed by cystoscopy and bladder‐derived pain, were enrolled. Patients were allocated to receive either KRP‐116D (n = 49) or placebo (n = 47). The study drug was intravesically administered every 2 weeks for 12 weeks. Results For the primary endpoint, the change in the mean O’Leary‐Sant Interstitial Cystitis Symptom Index score from baseline to week 12 was −5.2 in the KRP‐116D group and −3.4 in the placebo group. The estimated difference between the KRP‐116D and placebo groups was −1.8 (95% confidence interval −3.3, −0.3; P = 0.0188). Statistically significant improvements for KRP‐116D were also observed in the secondary endpoints including O’Leary‐Sant Interstitial Cystitis Problem Index score, micturition episodes/24 h, voided volume/micturition, maximum voided volume/micturition, numerical rating scale score for bladder pain, and global response assessment score. The adverse drug reactions were mild to moderate, and manageable. Conclusions This first randomized, double‐blind, placebo‐controlled trial shows that KRP‐116D improves symptoms, voiding parameters, and global response assessment, compared with placebo, and has a well‐tolerated safety profile in interstitial cystitis/bladder pain syndrome patients with the bladder‐centric phenotype.
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Affiliation(s)
- Naoki Yoshimura
- Department of Urology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA.,Department of Urology, Ueda Clinic, Kyoto, Japan
| | - Yukio Homma
- Japanese Red Cross Medical Center, Tokyo, Japan
| | - Hikaru Tomoe
- Department of Pelvic Reconstructive Surgery/Urology, Tokyo Women's Medical University Medical Center East, Tokyo, Japan
| | - Atsushi Otsuka
- Department of Urology, Hamamatsu University School of Medicine, Shizuoka, Japan
| | - Takeya Kitta
- Department of Renal and Genitourinary Surgery, Graduate School of Medical Science, Hokkaido University, Hokkaido, Japan
| | - Naoya Masumori
- Department of Urology, Sapporo Medical University School of Medicine, Hokkaido, Japan
| | - Yoshiyuki Akiyama
- Department of Urology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Aya Niimi
- Department of Urology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.,National Center for Global Health and Medicine, Tokyo, Japan
| | - Takahiko Mitsui
- Department of Urology, University of Yamanashi Graduate School of Medical Sciences, Yamanashi, Japan
| | | | | | - Mineo Takei
- Department of Urology, Harasanshin Hospital, Fukuoka, Japan
| | | | - Yuki Sekiguchi
- Female Urology, Women's Clinic LUNA Next Stage, Kanagawa, Japan
| | - Mitsuru Kajiwara
- Department of Urology, Hiroshima Prefectural Hospital, Hiroshima, Japan
| | | | - Kaname Ameda
- Hokkaido Memorial Hospital of Urology, Hokkaido, Japan
| | - Yozo Ohashi
- Department of Urology, Japan Community Healthcare Organization Ritsurin Hospital, Kagawa, Japan
| | | | - Osamu Muraki
- Department of Urology, Fujita General Hospital, Fukushima, Japan
| | - Toshihide Shishido
- Department of Urology, Tokyo Medical University Hachioji Medical Center, Tokyo, Japan
| | | | - Koji Kokura
- Department of Urology, Takarazuka City Hospital, Hyogo, Japan.,Kokura Urology Clinic, Hyogo, Japan
| | - Homare Okazoe
- Department of Urology, KKR Takamatsu Hospital, Kagawa, Japan
| | - Tomonori Yamanishi
- Department of Urology, Continence Center, Dokkyo Medical University, Tochigi, Japan
| | - Toyohiko Watanabe
- Department of Urology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Takashi Uno
- Clinical Development Center, Kyorin Pharmaceutical Co., Ltd., Tokyo, Japan
| | - Akira Ohinata
- Clinical Development Center, Kyorin Pharmaceutical Co., Ltd., Tokyo, Japan
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Adach W, Żuchowski J, Moniuszko-Szajwaj B, Szumacher-Strabel M, Stochmal A, Olas B, Cieslak A. In vitro antiplatelet activity of extract and its fractions of Paulownia Clone in Vitro 112 leaves. Biomed Pharmacother 2021; 137:111301. [PMID: 33561640 DOI: 10.1016/j.biopha.2021.111301] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 01/15/2021] [Accepted: 01/18/2021] [Indexed: 10/22/2022] Open
Abstract
BACKGROUND Paulownia Clone in Vitro 112, also known as Oxytree is a hybrid of Paulownia elongata and Paulownia fortunei, developed under laboratory conditions. Its seeds are sterile, making it a noninvasive variety that can only be propagated in the laboratory. In China, species from the Paulownia genus (Paulowniaceae) are widely used in traditional medicine for the treatment of infectious diseases, such as gonorrhea and erysipelas. It has a broad spectrum of bioactivity, including neuroprotective, antioxidant, antibacterial, antiphlogistic, antiviral, and cytotoxic actions. However, the antiplatelet potential of Paulownia Clone in Vitro 112 has not yet been described. STUDY DESIGN The aim of our study was thus to examine the effect of an extract and four fractions from leaves of Paulownia Clone in Vitro 112 on various parameters of platelet activation in an in vitro model. METHODS Composition of the investigated extract and fractions was determined by UHPLC-UV-MS. The following parameters of platelet activation were investigated: nonenzymatic lipid peroxidation in resting platelets; enzymatic lipid peroxidation (AA metabolism) in platelets activated by thrombin; superoxide anion (O2-.) generation in the resting and activated platelets; platelet adhesion to collagen type I and fibrinogen; platelet aggregation stimulated by various physiological agonists, such as ADP, collagen, and thrombin. The effect of the extract and fractions on extracellular LDH activity, a marker of cell damage, was also determined. RESULTS Verbascoside a phenylethnanoid glycoside, was the main secondary metabolite of the extract from leaves of oxytree (constituting approximately 45 % of all compounds). There were also iridoids, such as catalpol, aucubin, and 7-hydroxytomentoside, as well as flavonoids, such as luteolin and apigenin glycosides. Moreover, the extract had stronger antiplatelet properties than the fractions. For example, the extract at 10 μg/mL inhibited five parameters of platelet activation. CONCLUSIONS Our results show that Paulownia Clone in Vitro 112 leaves are a new valuable source of compounds with antiplatelet potential.
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Affiliation(s)
- Weronika Adach
- University of Łódź, Department of General Biochemistry, Faculty of Biology and Environmental Protection, 90-236, Łódź, Poland
| | - Jerzy Żuchowski
- Department of Biochemistry, Institute of Soil Science and Plant Cultivation, State Research Institute, 24-100, Puławy, Poland
| | - Barbara Moniuszko-Szajwaj
- Department of Biochemistry, Institute of Soil Science and Plant Cultivation, State Research Institute, 24-100, Puławy, Poland
| | | | - Anna Stochmal
- Department of Biochemistry, Institute of Soil Science and Plant Cultivation, State Research Institute, 24-100, Puławy, Poland
| | - Beata Olas
- University of Łódź, Department of General Biochemistry, Faculty of Biology and Environmental Protection, 90-236, Łódź, Poland.
| | - Adam Cieslak
- Department of Animal Nutrition, Poznań University of Life Sciences, Wołyńska 33, 60-637, Poznań, Poland.
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Comparative Phytochemical, Antioxidant, and Hemostatic Studies of Extract and Four Fractions from Paulownia Clone in Vitro 112 Leaves in Human Plasma. Molecules 2020; 25:molecules25194371. [PMID: 32977628 PMCID: PMC7583007 DOI: 10.3390/molecules25194371] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Revised: 09/12/2020] [Accepted: 09/18/2020] [Indexed: 12/17/2022] Open
Abstract
Background: The Paulownia Clone in Vitro 112, known as oxytree or oxygen tree, is a hybrid clone of the species Paulownia elongata and Paulownia fortunei (Paulowniaceae). The oxytree is a fast-growing hybrid cultivar that can adapt to wide variations in edaphic and climate conditions. In this work, Paulownia Clone in Vitro 112 leaves were separated into an extract and four fractions (A–D) differing in chemical content in order to investigate their chemical content using LC-MS analysis. The extract and fractions were also evaluated for their anticoagulant and antioxidant properties in a human plasma in vitro. Results: The Paulownia leaf extract contained mainly phenolic compounds (e.g., verbascoside), small amounts of iridoids (e.g., aucubin or 7-hydroxytometoside) and triterpenoids (e.g., maslinic acid) were also detected. Our results indicate that the extract and fractions have different effects on oxidative stress in human plasma treated with H2O2/Fe in vitro, which could be attributed to differences in their chemical content. For example, the extract and all the fractions, at the two highest concentrations of 10 and 50 µg/mL, significantly inhibited the plasma lipid peroxidation induced by H2O2/Fe. Fractions C and D, at all tested concentrations (1–50 µg/mL) were also found to protect plasma proteins against H2O2/Fe-induced carbonylation. The positive effects of fraction C and D were dependent on the dose. Conclusions: The extract and all four fractions, but particularly fractions C and D, which are rich in phenolic compounds, are novel sources of antioxidants, with an inhibitory effect on oxidative stress in human plasma in vitro. Additionally, the antioxidant potential of fraction D may be associated with triterpenoids.
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The Effects of Eugenol, Trans-Cinnamaldehyde, Citronellol, and Terpineol on Escherichia coli Biofilm Control as Assessed by Culture-Dependent and -Independent Methods. Molecules 2020; 25:molecules25112641. [PMID: 32517201 PMCID: PMC7321256 DOI: 10.3390/molecules25112641] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 06/01/2020] [Accepted: 06/05/2020] [Indexed: 11/16/2022] Open
Abstract
Bacterial biofilms contribute to problems with preserving food hygiene, jeopardizing any conventional intervention method used by the food industry. Hence, the approach of using essential oil (EO) compounds effective in biofilm control has considerable merit and deserves in-depth research. In this study, the effect of selected EO compounds (eugenol, trans-cinnamaldehyde, citronellol, and terpineol) was assessed on Escherichia coli biofilm control by plate count, resazurin assay, and Syto® 9/PI (-/propidium iodide) staining coupled with flow cytometry (FCM) and confocal laser scanning microscopy (CLSM). The selected EO compounds effectively inhibited the growth of planktonic E. coli at low concentrations of 3–5 mM, revealing a high antimicrobial activity. EO compounds markedly interfered with biofilms too, with trans-cinnamaldehyde causing the most prominent effects. Its antibiofilm activity was manifested by a high reduction of cell metabolic activity (>60%) and almost complete reduction in biofilm cell culturability. In addition, almost 90% of the total cells had perturbed cell membranes. Trans-cinnamaldehyde further impacted the cell morphology resulting in the filamentation and, thus, in the creation of a mesh network of cells. Citronellol scored the second in terms of the severity of the observed effects. However, most of all, it strongly prevented native microcolony formation. Eugenol and terpineol also affected the formation of a typical biofilm structure; however, small cell aggregates were still repeatedly found. Overall, eugenol caused the mildest impairment of cell membranes where 50% of the total cells showed the Syto® 9+/PI– pattern coupled with healthy cells and another 48% with injured cells (the Syto® 9+/PI+). For terpineol, despite a similar percentage of healthy cells, another 45% was shared between moderately (Syto® 9+PI+) and heavily (Syto® 9–PI+) damaged cells. The results highlight the importance of a multi-method approach for an accurate assessment of EO compounds’ action against biofilms and may help develop better strategies for their effective use in the food industry.
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DMSO supplementation during in vitro maturation of bovine oocytes improves blastocyst rate and quality. Theriogenology 2020; 148:140-148. [PMID: 32171973 DOI: 10.1016/j.theriogenology.2020.02.045] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Revised: 02/28/2020] [Accepted: 02/29/2020] [Indexed: 12/15/2022]
Abstract
The molecule Dimethyl sulfoxide is widely used as drug solvent. However, its antioxidant property was poorly explored. In this study, we evaluated the effect of DMSO supplementation during oocyte in vitro maturation (IVM) on embryo development and quality. Bovine oocytes were matured with different DMSO concentrations (0, 0.1, 0.25, 0.5, 0.75, 1 and 10% v:v) followed by in vitro fertilization. Subsequently, quality indicators such as gene expression of SOX2, OCT4, CDX2, SOD1, oocyte and embryo redox status and DNA damage were evaluated. Polar body extrusion and blastocyst rates increased with 0.5% v:v DMSO. Moreover, first polar body extrusion and blastocyst rates did not increase with 1%, and 10% of DMSO reduced polar body extrusion and did not produce blastocyst. Optimal concentration of DMSO for the use on the maturation was estimated at around 0.45% v:v. Supplementation with 0.5% v:v DMSO has not affected mRNA abundance of genes key in blastocyst, however 0.75% increased gene expression of OCT4 and SOX2. Oocytes matured with 0.5% v:v DMSO and blastocyst from DMSO group showed reduced lipid peroxidation respect control. Total Glutathione concentrations increased in blastocyst stage in DMSO group. DMSO increased the total cell number of blastocysts but not TUNEL positive cells. In conclusion, our results suggest that low DMSO concentrations used during bovine oocytes in vitro maturation increases the maturation, as well as the blastocyst rate and its quality, without demonstrating deleterious effect on embryo cells.
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Oliveira IM, Borges A, Borges F, Simões M. Repurposing ibuprofen to control Staphylococcus aureus biofilms. Eur J Med Chem 2019; 166:197-205. [DOI: 10.1016/j.ejmech.2019.01.046] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Revised: 01/15/2019] [Accepted: 01/19/2019] [Indexed: 12/21/2022]
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Tienaho J, Poikulainen E, Sarjala T, Muilu-Mäkelä R, Santala V, Karp M. A Bioscreening Technique for Ultraviolet Irradiation Protective Natural Substances. Photochem Photobiol 2018; 94:1273-1280. [PMID: 29882378 DOI: 10.1111/php.12954] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Accepted: 05/28/2018] [Indexed: 12/27/2022]
Abstract
Ultraviolet radiation (UV-R) causes genotoxic and aging effects on skin, and sunscreens are used to alleviate the damage. However, sunscreens contain synthetic shielding agents that can cause harmful effects in the environment. Nature-derived substances may have potential as replacement materials for the harmful sunscreen chemicals. However, screening of a broad range of samples is tedious, and often requires a separate genotoxicity assessment. We describe a simple microplate technique for the screening of UV protective substances using a recombinant Escherichia coli biosensor. Both absorbance-based and bioactivity-based shields can be detected with simultaneous information about the sample genotoxicity. With this technique, a controversial sunscreen compound, oxybenzone offers physical or absorbance-based shield but appears genotoxic at higher concentrations (3.3 mg/mL). We also demonstrate that pine needle extract (PiNe ) shields the biosensor from UV-R in a dose-dependent manner without showing genotoxicity. The physical shield of 5 mg/mL PiNe was similar to that of one of the most common UV-shielding compound TiO2 concentration 0.80 mg/mL. The bioactivity-based shield of PiNe also reaches the extent of the physical shield with the highest concentration (3.3 mg/mL). We conclude that our technique is suitable in detecting the UV-shielding potential of natural substances, and gives simultaneous information on genotoxicity.
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Affiliation(s)
- Jenni Tienaho
- Laboratory of Chemistry and Bioengineering, Tampere University of Technology, Tampere, Finland.,Natural Resources Institute Finland (Luke), Production systems, Parkano, Finland
| | - Emmi Poikulainen
- Laboratory of Chemistry and Bioengineering, Tampere University of Technology, Tampere, Finland
| | - Tytti Sarjala
- Natural Resources Institute Finland (Luke), Production systems, Parkano, Finland
| | - Riina Muilu-Mäkelä
- Natural Resources Institute Finland (Luke), Production systems, Parkano, Finland
| | - Ville Santala
- Laboratory of Chemistry and Bioengineering, Tampere University of Technology, Tampere, Finland
| | - Matti Karp
- Laboratory of Chemistry and Bioengineering, Tampere University of Technology, Tampere, Finland
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Golius A, Gorb L, Isayev O, Leszczynski J. Diffusion of energetic compounds through biological membrane: Application of classical MD and COSMOmic approximations. J Biomol Struct Dyn 2018; 37:247-255. [PMID: 29301457 DOI: 10.1080/07391102.2018.1424037] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Computational studies of the potential biological impact of several energetic compounds were performed. The most commonly used explosives were considered in the present studies: trinitrotoluene (TNT), 2,4-dinitrotoluene (2,4-DNT), 2,4-dinitroanisole (DNAN), and 5-Nitro-2,4-dihydro-3H-1,2,4-triazol-3-one (NTO). The effect of such factors as ionic strength and presence of DMSO in the water solution on the structure of the membrane were considered using the POPC lipid bilayer as an example. Molecular dynamics (MD) simulations revealed that, even on a short-time scale, the influence of those additives is noticeable, and therefore those factors should always be taken into account. The MD and the COSMOmic approaches were used to elucidate the ability of the energetic compounds to penetrate the living cell. Calculated free energy profiles and partitioning coefficients revealed distributions of the compounds in the lipid bilayer as well as an overall ability to enter the cell. MD in this case provides a better representation of the free energy profile, while the COSMOmic approach works better to predict log(Klipw) values. The effect of the functional group was observed for the profiles that were obtained using the MD method.
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Affiliation(s)
- Anastasiia Golius
- a Department of Chemistry, Physics and Atmospheric Science , Jackson State University , Jackson , Mississippi , USA
| | - Leonid Gorb
- b Institute of Molecular Biology and Genetics , Kyiv , Ukraine
| | - Olexander Isayev
- c Division of Chemical Biology and Medicinal Chemistry , Eshelman School of Pharmacy, University of North Carolina at Chapel Hill , North Carolina , USA
| | - Jerzy Leszczynski
- a Department of Chemistry, Physics and Atmospheric Science , Jackson State University , Jackson , Mississippi , USA
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14
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Borges A, Lopez-Romero JC, Oliveira D, Giaouris E, Simões M. Prevention, removal and inactivation of Escherichia coli and Staphylococcus aureus biofilms using selected monoterpenes of essential oils. J Appl Microbiol 2017; 123:104-115. [PMID: 28497526 DOI: 10.1111/jam.13490] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2017] [Revised: 04/27/2017] [Accepted: 05/06/2017] [Indexed: 02/04/2023]
Abstract
AIMS The aim of this study was to investigate the antibiofilm potential of five essential oil (EO) components with cyclic (sabinene-SAB, carveol-C1, carvone-C2) and acyclic (citronellol-C3 and citronellal-C4) structures against Escherichia coli and Staphylococcus aureus. METHODS AND RESULTS The selected EO components prevented biofilm set-up, with C3 and C4 causing remarkable effects. When applied against pre-established biofilms, they promoted high biomass removal and inactivation of biofilm cells. Moreover, no viable E. coli biofilm cells were detected after exposure to SAB at 5 × MIC and 10 × MIC, and a significant viability decrease was observed for both bacteria with the other EO components. SAB, C3 and C4 caused the most prominent effects apparently due to their octanol-water partition coefficient (Po/w), the number of rotatable bonds (n-ROTB) and the free hydroxyl groups. CONCLUSIONS The overall results demonstrated that the selected EO components, particularly SAB, C3 and C4 are of interest as new lead molecules to both prevent biofilm set-up and to control pre-established biofilms of E. coli and S. aureus. SIGNIFICANCE AND IMPACT OF THE STUDY The tested EO components exhibited prominent antibiofilm properties against E. coli and S. aureus providing a novel and effective alternative/complementary approach to counteract chronic infections and the transmission of diseases in clinical settings.
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Affiliation(s)
- A Borges
- LEPABE, Department of Chemical Engineering, Faculty of Engineering, University of Porto, Porto, Portugal
| | - J C Lopez-Romero
- CIAD, Research Center for Food and Development, Hermosillo, Sonora, Mexico
| | - D Oliveira
- LEPABE, Department of Chemical Engineering, Faculty of Engineering, University of Porto, Porto, Portugal
| | - E Giaouris
- Department of Food Science and Nutrition, Faculty of the Environment, University of the Aegean, Myrina, Lemnos Island, Greece
| | - M Simões
- LEPABE, Department of Chemical Engineering, Faculty of Engineering, University of Porto, Porto, Portugal
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15
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Cawley AT, Keledjian J. Intelligence-based anti-doping from an equine biological passport. Drug Test Anal 2017; 9:1441-1447. [DOI: 10.1002/dta.2180] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Revised: 01/30/2017] [Accepted: 02/26/2017] [Indexed: 12/23/2022]
Affiliation(s)
- Adam T. Cawley
- Australian Racing Forensic Laboratory; Racing NSW; Sydney New South Wales Australia
| | - John Keledjian
- Australian Racing Forensic Laboratory; Racing NSW; Sydney New South Wales Australia
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16
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Photoreceptor degeneration by intravitreal injection of N-methyl-N-nitrosourea (MNU) in rabbits: a pilot study. Graefes Arch Clin Exp Ophthalmol 2016; 255:317-331. [PMID: 27866331 DOI: 10.1007/s00417-016-3531-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Revised: 09/13/2016] [Accepted: 10/17/2016] [Indexed: 10/20/2022] Open
Abstract
BACKGROUND Pilot study on the attempt to induce selective photoreceptor degeneration in the rabbit eye by intravitreal injection of MNU, facing the difficulties of the evaluation of retinal degeneration by different in-vivo and in-vitro methods in such a large eye animal model. METHODS Eight pigmented Chinchilla Bastard rabbits were injected intravitreally with MNU (1 × 1mg/kg body weight (BW), 1 × 2mg/kg BW, 3 × 3mg/kg BW, 1 × 4mg/kg BW, 1 × 6mg/kg BW, and 1 × DMSO + PBS as control). One, 2, and 3 weeks after injection, the effects on the rabbit retina were examined in vivo using clinical observation (macroscopic images, funduscopy, weighing of the animals), measurement of intraocular pressure (IOP), full-field Electroretinography (ffERG), and spectral-domain Optical Coherence Tomography (sd-OCT). After 3 weeks follow-up, blood samples were taken to evaluate the general health status of the animals, and immunohistochemistry (IH) was performed on sections obtained from six different regions throughout the whole retina to evaluate MNU effects in more detail. RESULTS It was difficult to observe the effects of MNU on retinal structure by OCT in vivo. Only the temporal quadrant of the retina could be visualized. Therefore, it was indispensible to evaluate the effects of MNU on the retina in vitro by examining six areas of the retina using immunohistochemistry. Furthermore, immunohistochemistry plays a decisive role to evaluate the effects on retinal cells other than photoreceptors while in H&E staining, namely the cell count of the ONL can be observed. The results obtained in vivo and in vitro in this study mainly follow the results of a previous study in mice. The low doses of MNU (1, 2 mg/kg BW) had no effects on retinal function and morphology, while high doses (4, 6 mg/kg BW) led to retinal changes in combination with significant side-effects (e.g., cataractous changes). Injection of 3 mg/kg BW MNU induced selective photoreceptor degeneration. However, the degree of degeneration varied between different parts of the same retina and between retinae of different animals. In two of three animals, a complete loss of ERG potentials was observed. Negative effects on the contralateral eye or on general welfare of the animal were never observed. CONCLUSIONS In rabbits, the intravitreal injection of 3 mg/kg BW MNU leads to selective but inhomogeneous photoreceptor degeneration.
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17
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Salomonsson ML, Bondesson U, Hedeland M. Quantification of dimethylsulfoxide (DMSO) in equine plasma and urine using HILIC-MS/MS. Drug Test Anal 2016; 9:935-941. [DOI: 10.1002/dta.2098] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Revised: 09/19/2016] [Accepted: 09/24/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Matilda L. Salomonsson
- Department of Chemistry, Environment and Feed Hygiene; National Veterinary Institute (SVA); SE-751 89 Uppsala Sweden
- Division of Analytical Pharmaceutical Chemistry, Department of Medicinal Chemistry; Uppsala University, BMC; SE-751 23 Uppsala Sweden
| | - Ulf Bondesson
- Department of Chemistry, Environment and Feed Hygiene; National Veterinary Institute (SVA); SE-751 89 Uppsala Sweden
- Division of Analytical Pharmaceutical Chemistry, Department of Medicinal Chemistry; Uppsala University, BMC; SE-751 23 Uppsala Sweden
| | - Mikael Hedeland
- Department of Chemistry, Environment and Feed Hygiene; National Veterinary Institute (SVA); SE-751 89 Uppsala Sweden
- Division of Analytical Pharmaceutical Chemistry, Department of Medicinal Chemistry; Uppsala University, BMC; SE-751 23 Uppsala Sweden
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18
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Abstract
Engineering of supramolecular assemblies on surfaces is an emerging field of research impacting chemistry, electronics, and biology. Among supramolecular assemblies, metal-containing structures provide rich properties and enable robust nanostructured designs. In this issue of ACS Nano, Feng et al. report that supramolecular assemblies can trap gold adatoms that maintain a charged state on a Au(111) surface. Such charged adatoms may offer additional degrees of freedom in designing novel supramolecular architectures for efficient catalysts, memory, and charge storage for medical applications.
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Affiliation(s)
- Saw-Wai Hla
- Center for Nanoscale Materials, Nanoscience and Technology Division, Argonne National Laboratory , Lemont, Illinois 60439, United States
- Nanoscience and Quantum Phenomena Institute and Condensed Matter and Surface Science Program, Ohio University , Athens, Ohio 45701, United States
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19
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Simply red: A novel spectrophotometric erythroid proliferation assay as a tool for erythropoiesis and erythrotoxicity studies. ACTA ACUST UNITED AC 2014. [PMID: 28626660 PMCID: PMC5466125 DOI: 10.1016/j.btre.2014.07.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Most mammalian cell proliferation assays rely on manual or automated cell counting or the assessment of metabolic activity in colorimetric assays, with the former being either labor and time intensive or expensive and the latter being multistep procedures requiring the addition of several reagents. The proliferation of erythroid cells from hematopoietic stem cells and their differentiation into mature red blood cells is characterized by the accumulation of large amounts of hemoglobin. Hemoglobin concentrations are easily quantifiable using spectrophotometric methods due to the specific absorbance peak of the molecule’s heme moiety between 400 and 420 nm. Erythroid proliferation can therefore be readily assessed using spectrophotometric measurement in this range. We have used this feature of erythroid cells to develop a simple erythroid proliferation assay that is minimally labor/time- and reagent-intensive and could easily be automated for use in high-throughput screening. Such an assay can be a valuable tool for investigations into hematological disorders where erythropoiesis is dysregulated, i.e., either inhibited or enhanced, into the development of anemia as a side-effect of primary diseases such as parasitic infections and into cyto-(particularly erythro-) toxicity of chemical agents or drugs.
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20
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Salta M, Wharton JA, Dennington SP, Stoodley P, Stokes KR. Anti-biofilm performance of three natural products against initial bacterial attachment. Int J Mol Sci 2013; 14:21757-80. [PMID: 24192819 PMCID: PMC3856033 DOI: 10.3390/ijms141121757] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2013] [Revised: 10/13/2013] [Accepted: 10/15/2013] [Indexed: 01/15/2023] Open
Abstract
Marine bacteria contribute significantly towards the fouling consortium, both directly (modern foul release coatings fail to prevent "slime" attachment) and indirectly (biofilms often excrete chemical cues that attract macrofouling settlement). This study assessed the natural product anti-biofilm performance of an extract of the seaweed, Chondrus crispus, and two isolated compounds from terrestrial sources, (+)-usnic acid and juglone, against two marine biofilm forming bacteria, Cobetia marina and Marinobacter hydrocarbonoclasticus. Bioassays were developed using quantitative imaging and fluorescent labelling to test the natural products over a range of concentrations against initial bacterial attachment. All natural products affected bacterial attachment; however, juglone demonstrated the best anti-biofilm performance against both bacterial species at a concentration range between 5-20 ppm. In addition, for the first time, a dose-dependent inhibition (hormetic) response was observed for natural products against marine biofilm forming bacteria.
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Affiliation(s)
- Maria Salta
- National Centre for Advanced Tribology at Southampton (nCATS), Engineering Sciences, University of Southampton, Highfield, Southampton SO17 1BJ, UK; E-Mails: (J.A.W.); (S.P.D.); (P.S.); (K.R.S.)
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +44-0-2380-593761; Fax: +44-0-2380-5930161
| | - Julian A. Wharton
- National Centre for Advanced Tribology at Southampton (nCATS), Engineering Sciences, University of Southampton, Highfield, Southampton SO17 1BJ, UK; E-Mails: (J.A.W.); (S.P.D.); (P.S.); (K.R.S.)
| | - Simon P. Dennington
- National Centre for Advanced Tribology at Southampton (nCATS), Engineering Sciences, University of Southampton, Highfield, Southampton SO17 1BJ, UK; E-Mails: (J.A.W.); (S.P.D.); (P.S.); (K.R.S.)
| | - Paul Stoodley
- National Centre for Advanced Tribology at Southampton (nCATS), Engineering Sciences, University of Southampton, Highfield, Southampton SO17 1BJ, UK; E-Mails: (J.A.W.); (S.P.D.); (P.S.); (K.R.S.)
| | - Keith R. Stokes
- National Centre for Advanced Tribology at Southampton (nCATS), Engineering Sciences, University of Southampton, Highfield, Southampton SO17 1BJ, UK; E-Mails: (J.A.W.); (S.P.D.); (P.S.); (K.R.S.)
- Physical Sciences Department, the Defence Science and Technology Laboratory, Porton Down, Salisbury, Wiltshire SP4 0JQ, UK
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21
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In Vitro Uptake and Release of Natamycin From Conventional and Silicone Hydrogel Contact Lens Materials. Eye Contact Lens 2013; 39:162-8. [DOI: 10.1097/icl.0b013e31827a7a07] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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22
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Influence of vehicles used for oral dosing of test molecules on the progression of Mycobacterium tuberculosis infection in mice. Antimicrob Agents Chemother 2012; 56:6026-8. [PMID: 22926571 DOI: 10.1128/aac.01702-12] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Preclinical evaluation of drug-like molecules requires their oral administration to experimental animals using suitable vehicles. We studied the effect of oral dosing with corn oil, carboxymethyl cellulose, dimethyl sulfoxide, and polysorbate-80 on the progression of Mycobacterium tuberculosis infection in mice. Infection was monitored by physical (survival time and body weight) and bacteriological (viable counts in lungs) parameters. Compared with water, corn oil significantly improved both sets of parameters, whereas the other vehicles affected only physical parameters.
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Julien C, Marcouiller F, Bretteville A, El Khoury NB, Baillargeon J, Hébert SS, Planel E. Dimethyl sulfoxide induces both direct and indirect tau hyperphosphorylation. PLoS One 2012; 7:e40020. [PMID: 22768202 PMCID: PMC3386937 DOI: 10.1371/journal.pone.0040020] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2012] [Accepted: 05/30/2012] [Indexed: 01/14/2023] Open
Abstract
Dimethyl sulfoxide (DMSO) is widely used as a solvent or vehicle for biological studies, and for treatment of specific disorders, including traumatic brain injury and several forms of amyloidosis. As Alzheimer’s disease (AD) brains are characterized by deposits of β-amyloid peptides, it has been suggested that DMSO could be used as a treatment for this devastating disease. AD brains are also characterized by aggregates of hyperphosphorylated tau protein, but the effect of DMSO on tau phosphorylation is unknown. We thus investigated the impact of DMSO on tau phosphorylation in vitro and in vivo. One hour following intraperitoneal administration of 1 or 2 ml/kg DMSO in mice, no change was observed in tau phosphorylation. However, at 4 ml/kg, tau was hyperphosphorylated at AT8 (Ser202/Thr205), PHF-1 (Ser396/Ser404) and AT180 (Thr231) epitopes. At this dose, we also noticed that the animals were hypothermic. When the mice were maintained normothermic, the effect of 4 ml/kg DMSO on tau hyperphosphorylation was prevented. On the other hand, in SH-SY5Y cells, 0.1% DMSO induced tau hyperphosphorylation at AT8 and AT180 phosphoepitopes in normothermic conditions. Globally, these findings demonstrate that DMSO can induce tau hyperphosphorylation indirectly via hypothermia in vivo, and directly in vitro. These data should caution researchers working with DMSO as it can induce artifactual results both in vivo and in vitro.
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Affiliation(s)
- Carl Julien
- Département de Neurosciences et Psychiatrie, Faculté de Médecine, Université Laval, Québec, Québec, Canada
- Axe Neurosciences, Centre de Recherche du Centre Hospitalier Universitaire de Québec, Québec, Québec, Canada
- * E-mail: (CJ); (EP)
| | - François Marcouiller
- Département de Neurosciences et Psychiatrie, Faculté de Médecine, Université Laval, Québec, Québec, Canada
- Axe Neurosciences, Centre de Recherche du Centre Hospitalier Universitaire de Québec, Québec, Québec, Canada
| | - Alexis Bretteville
- Département de Neurosciences et Psychiatrie, Faculté de Médecine, Université Laval, Québec, Québec, Canada
- Axe Neurosciences, Centre de Recherche du Centre Hospitalier Universitaire de Québec, Québec, Québec, Canada
| | - Noura B. El Khoury
- Département de Neurosciences et Psychiatrie, Faculté de Médecine, Université Laval, Québec, Québec, Canada
- Axe Neurosciences, Centre de Recherche du Centre Hospitalier Universitaire de Québec, Québec, Québec, Canada
| | - Joanie Baillargeon
- Département de Neurosciences et Psychiatrie, Faculté de Médecine, Université Laval, Québec, Québec, Canada
- Axe Neurosciences, Centre de Recherche du Centre Hospitalier Universitaire de Québec, Québec, Québec, Canada
| | - Sébastien S. Hébert
- Département de Neurosciences et Psychiatrie, Faculté de Médecine, Université Laval, Québec, Québec, Canada
- Axe Neurosciences, Centre de Recherche du Centre Hospitalier Universitaire de Québec, Québec, Québec, Canada
| | - Emmanuel Planel
- Département de Neurosciences et Psychiatrie, Faculté de Médecine, Université Laval, Québec, Québec, Canada
- Axe Neurosciences, Centre de Recherche du Centre Hospitalier Universitaire de Québec, Québec, Québec, Canada
- * E-mail: (CJ); (EP)
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24
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Leaver KR, Reynolds A, Bodard S, Guilloteau D, Chalon S, Kassiou M. Effects of translocator protein (18 kDa) ligands on microglial activation and neuronal death in the quinolinic-acid-injected rat striatum. ACS Chem Neurosci 2012; 3:114-9. [PMID: 22860181 DOI: 10.1021/cn200099e] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2011] [Revised: 12/08/2011] [Indexed: 11/28/2022] Open
Abstract
There is evidence that excitotoxicity and prolonged microglial activation are involved in neuronal death in neurodegenerative disorders. Activated microglia express various molecules, including the translocator protein 18 kDa (TSPO; formerly known as the peripheral benzodiazepine receptor) on the outer mitochondrial membrane. The TSPO is a novel target for neuroprotective treatments which aim to reduce microglial activation. The effect of PK 11195 and three other TSPO ligands on the level of microglial activation and neuronal survival was evaluated in a quinolinic acid (QUIN) rat model of excitotoxic neurodegeneration. All three ligands were neuroprotective at a level comparable to PK 11195. All of the ligands decreased microglial activation following the injection of QUIN but had no effect on astrogliosis. Interestingly, we also observed neuroprotective effects from the vehicle, dimethyl sulfoxide (DMSO).
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Affiliation(s)
- Katherine R. Leaver
- Department of Pharmacology,
Bosch Institute and School of Medical Sciences, University of Sydney, NSW 2006, Australia
- Brain
and Mind Research Institute, University of Sydney, NSW 2050, Australia
- UMR INSERM U930,
CNRS ERL 3106, Université François Rabelais de Tours, Tours, France
| | - Aaron Reynolds
- School of Chemistry, University of Sydney, NSW 2006, Australia
| | - Sylvie Bodard
- UMR INSERM U930,
CNRS ERL 3106, Université François Rabelais de Tours, Tours, France
| | - Denis Guilloteau
- UMR INSERM U930,
CNRS ERL 3106, Université François Rabelais de Tours, Tours, France
| | - Sylvie Chalon
- UMR INSERM U930,
CNRS ERL 3106, Université François Rabelais de Tours, Tours, France
| | - Michael Kassiou
- School of Chemistry, University of Sydney, NSW 2006, Australia
- Brain
and Mind Research Institute, University of Sydney, NSW 2050, Australia
- Discipline of Medical Radiation
Sciences, University of Sydney, NSW 2006,
Australia
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25
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Klein A, Gidyk DC, Shriner AM, Colwell KL, Tatton NA, Tatton WG, Metz GA. Dose-dependent loss of motor function after unilateral medial forebrain bundle rotenone lesion in rats: A cautionary note. Behav Brain Res 2011; 222:33-42. [DOI: 10.1016/j.bbr.2011.03.018] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2011] [Revised: 03/07/2011] [Accepted: 03/09/2011] [Indexed: 12/21/2022]
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26
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Yao M, Li Y, Hossu M, Joly AG, Liu Z, Liu Z, Chen W. Luminescence of Lanthanide–Dimethyl Sulfoxide Compound Solutions. J Phys Chem B 2011; 115:9352-9. [DOI: 10.1021/jp202350p] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mingzhen Yao
- Department of Physics, The University of Texas at Arlington, Arlington, Texas 76019-0059, United States
| | - Yuebin Li
- Department of Physics, The University of Texas at Arlington, Arlington, Texas 76019-0059, United States
- School of Physics, Huazhong University of Science and Technology, Wuhan, People's Republic of China 430074
| | - Marius Hossu
- Department of Physics, The University of Texas at Arlington, Arlington, Texas 76019-0059, United States
| | - Alan G. Joly
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Zhongxin Liu
- Department of Physics, The University of Texas at Arlington, Arlington, Texas 76019-0059, United States
- Department of Material and Chemical Engineering, Hainan University, Haikou, People's Republic of China 570228
| | - Zuli Liu
- School of Physics, Huazhong University of Science and Technology, Wuhan, People's Republic of China 430074
| | - Wei Chen
- Department of Physics, The University of Texas at Arlington, Arlington, Texas 76019-0059, United States
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27
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Yao M, Chen W. Hypersensitive luminescence of Eu3+ in dimethyl sulfoxide as a new probing for water measurement. Anal Chem 2011; 83:1879-82. [PMID: 21319747 DOI: 10.1021/ac200072s] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Dimethyl sulfoxide (DMSO) is a well-known organic solvent that can be used for biological applications. DMSO is miscible with water, and it is very common that the two solvents are mixed for some applications. It is important to detect water in DMSO, and this has been done using the luminescence decay lifetimes from Eu(3+) ions. We observed that the emissions of Eu(3+) in DMSO are very strong and very sensitive to water. The emission band from the (5)D(0) → (7)F(2) transition has two peaks at 613 and 617 nm, respectively, and these two peaks change in the opposite ways when water is added into DMSO. The intensity ratio of the two peaks follows nearly perfect linear dependence on the water concentration added in DMSO. This linear relationship provides a new and convenient method for water measurement in DMSO.
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28
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Sîrbulescu RF, Zupanc GKH. Inhibition of caspase-3-mediated apoptosis improves spinal cord repair in a regeneration-competent vertebrate system. Neuroscience 2010; 171:599-612. [PMID: 20837106 DOI: 10.1016/j.neuroscience.2010.09.002] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2010] [Revised: 08/19/2010] [Accepted: 09/02/2010] [Indexed: 01/06/2023]
Abstract
Teleost fish exhibit an excellent potential for structural and functional recovery after CNS lesions. The function of apoptosis in the process of regeneration remains controversial. While some studies have identified this type of cell death as essential for successful regeneration, other investigations have suggested some degree of functional improvement after inhibition of apoptosis. In the present study, we examined whether inhibition of apoptosis immediately after injury can improve spinal cord regeneration. As a model system, we used Apteronotus leptorhynchus, a regeneration-competent weakly electric fish. To inhibit apoptosis, we employed 2,2'-methylenebis (1,3-cyclohexanedione) (M50054), a compound that prevents caspase-3 activation. Administration of this apoptosis inhibitor led to a significant reduction in the numbers of apoptotic cells at 24 h, 5 days, and 30 days after the lesion. Using triple immunolabeling, we identified a significant reduction in the level of apoptosis at 5 and 30 days after the lesion among the following cellular categories: cells generated shortly after the lesion, existing neurons, and newly differentiated neurons. This reduced rate of apoptosis led to an increase in the relative number of differentiating and surviving neurons at both 5 and 30 days post-injury, compared to the control groups. Functional regeneration, as indicated by the recovery rate of the amplitude of the electric organ discharge (EOD), was significantly improved within the first 20 days after the lesion in the fish treated with M50054. Our data provide the first evidence that modulation of caspase-3 activation can significantly improve neuroregeneration and functional recovery in a regeneration-competent organism.
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Affiliation(s)
- R F Sîrbulescu
- School of Engineering and Science, Jacobs University Bremen, P.O. BOX 750 561, 28725 Bremen, Germany
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29
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Lau FC, Bagchi M, Bagchi D. Refuting "Evaluation of the genotoxitocity of (-)-hydroxycitric acid (HCA-SX) isolated from Garcinia Cambogia" by Lee and Lee, Journal of Toxicology and Environmental Health, 70:388-392, 2007. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2008; 71:348-351. [PMID: 18214809 DOI: 10.1080/15287390701738525] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
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30
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Kiselev MA. Combined application of neutron and synchrotron radiation for investigation of the influence of dimethyl sulfoxide on the structure and properties of the dipalmitoylphosphatidylcholine membrane. CRYSTALLOGR REP+ 2007. [DOI: 10.1134/s1063774507030352] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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31
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Dyubko TS, Onishchenko EV, Pivovarenko VG. Influence of freezing and low molecular weight cryoprotectants on microsomal membrane structure: a study by multiparametric fluorescent probe. J Fluoresc 2006; 16:817-23. [PMID: 16977488 DOI: 10.1007/s10895-006-0089-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2005] [Accepted: 02/23/2006] [Indexed: 10/24/2022]
Abstract
The influence of low molecular weight cryoprotectants (CPs) such as glycerol (GL), 1,2-propanediol (PD) and dimethylsulfoxide (DMSO) on the structure of rat liver microsomal membranes on the stages of equilibration and upon freezing up to -196 degrees C was studied using a multiparametric fluorescent probe of flavonol nature. It was estimated that the studied CPs have individual concentration ranges defining low amplitude of their action on biomembranes. An exceeding of these ranges strongly increases the violation of membrane native structure already at the stage of incubation with CPs, strengthening it during the freezing procedure. According to the perturbation effect on microsomal membranes the studied CPs can be arranged in a sequence: DMSO>PD>GL.
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Affiliation(s)
- Tatyana S Dyubko
- Institute for Problems of Cryobiology and Cryomedicine, Ukrainian National Academy of Sciences, 23 Pereyaslavskaya Str., Kharkov, 61015, Ukraine
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32
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Effects of curcumin on reflux esophagitis in rats. J Nat Med 2006; 60:198-205. [PMID: 29435885 DOI: 10.1007/s11418-006-0036-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2005] [Accepted: 01/10/2006] [Indexed: 02/05/2023]
Abstract
The preventive effect of curcumin, a compound isolated from the rhizome of Curcuma longa, on experimental reflux esophagitis in rats was investigated in order to validate its potential therapeutic use for gastroesophageal reflux disease. Curcumin (20 mg/kg, i.d.), the antioxidative agent dimethyl sulfoxide (DMSO) (1 ml/kg, i.p.) or the proton pump inhibitor lansoprazole (1 mg/kg, i.d.) inhibited the formation of acute acid reflux esophagitis by 52.5, 61.5 and 70.9% respectively. Curcumin alone was not effective in preventing chronic acid reflux esophagitis, but the combination of curcumin and DMSO reduced the mortality rate and the severity of the esophagitis ulcer index to the same extent (56.5%) as did the lansoprazole (53.9%). Intraduodenal administration of curcumin also markedly prevented the formation of acute mixed reflux esophagitis, together with reducing the incidence or the severity of neutrophil infiltration, when compared to a control group. In contrast, lansoprazole tended to increase the severity of all histopathological changes, when compared to either the control or the curcumin-treated group. Aminoguanidine, a specific inducible nitric oxide synthase inhibitor, had no preventive effect against both types of acute reflux esophagitis models, and increased the mortality in the chronic acid reflux esophagitis model. From these results, it is indicated that curcumin can effectively prevent acute reflux esophagitis formation. Although curcumin is less potent than lansoprazole in inhibiting acid reflux esophagitis, it is superior to lansoprazole in inhibiting mixed reflux esophagitis. The antiulcerogenic mechanisms are considered to be closely associated with its antioxidant nature and antiinflammatory property.
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Bardutzky J, Meng X, Bouley J, Duong TQ, Ratan R, Fisher M. Effects of intravenous dimethyl sulfoxide on ischemia evolution in a rat permanent occlusion model. J Cereb Blood Flow Metab 2005; 25:968-77. [PMID: 15744247 PMCID: PMC2949963 DOI: 10.1038/sj.jcbfm.9600095] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Dimethyl sulfoxide (DMSO) has a variety of biological actions that suggest efficacy as a neuroprotectant. We (1) tested the neuroprotective potential of DMSO at different time windows on infarct size using 2,3,5-triphenyltetrazolium staining and (2) investigated the effects of DMSO on ischemia evolution using quantitative diffusion and perfusion imaging in a permanent middle cerebral artery occlusion (MCAO) model in rats. In experiment 1, DMSO treatment (1.5 g/kg intravenously over 3 h) reduced infarct volume 24 h after MCAO by 65% (P<0.00001) when initiated 20 h before MCAO, by 44% (P=0.0006) when initiated 1 h after MCAO, and by 17% (P=0.11) when started 2 h after MCAO. Significant infarct reduction was also observed after a 3-day survival in animals treated 1 h after MCAO (P=0.005). In experiment 2, treatment was initiated 1 h after MCAO and maps for cerebral blood flow (CBF) and apparent diffusion coefficient (ADC) were acquired before treatment and then every 30 mins up to 4 h. Cerebral blood flow characteristics and CBF-derived lesion volumes did not differ between treated and untreated animals, whereas the ADC-derived lesion volume essentially stopped progressing during DMSO treatment, resulting in a persistent diffusion/perfusion mismatch. This effect was mainly observed in the cortex. Our data suggest that DMSO represents an interesting candidate for acute stroke treatment.
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Affiliation(s)
- Juergen Bardutzky
- Department of Neurology, University of Massachusetts Medical School, Worcester, Massachusetts, USA.
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Kume T, Katsuki H, Akaike A. Endogenous factors regulating neuronal death induced by radical stress. Biol Pharm Bull 2005; 27:964-7. [PMID: 15256723 DOI: 10.1248/bpb.27.964] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Neurons in the central nervous system (CNS) are vulnerable to radical stress caused by reactive oxygen species, including nitric oxide (NO). Those radicals play crucial roles in glutamate neurotoxicity associated with ischemic brain injury and a wide range of neurodegenerative disorders. In our previous studies, we have shown evidence suggesting that glutamate neurotoxicity is regulated by certain endogenous substances such as neurotrophins, nicotinic acetylcholine, prostanoids and vitamins. Based on those findings, we have used the term 'neuroprotective factor' for endogenous substances possessing protective activity against glutamate neurotoxicity, and have further searched for a candidate with unique structure. We isolated a novel neuroprotective substance named 'serofendic acid' derived from fetal calf serum. The compound exhibited potent protective action against neurotoxicity induced by glutamate and by an NO donor without inhibiting glutamate receptors. Electron spin resonance analysis demonstrated that serofendic acid had no direct scavenging activity on NO, but was capable of inhibiting the generation of a hydroxyl radical, a presumed 'executor' radical in the nitric oxide-mediated neurotoxic cascade. The chemical structure was determined by mass spectrometry and nuclear magnetic resonance spectroscopy, and was confirmed by synthesis. The structure was unique among known endogenous substances because the compound was a sulfur-containing atisane type diterpenoid. The discovery of serofendic acid may provide a new scope for the investigation of low-molecular weight bioactive factors promoting the survival of CNS neurons.
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Affiliation(s)
- Toshiaki Kume
- Department of Pharmacology, Graduate School of Pharmaceutical Sciences, Kyoto University, Japan
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Lin HC, Johnson CR, Duran SH, Waldridge BM. Effects of intravenous administration of dimethyl sulfoxide on cardiopulmonary and clinicopathologic variables in awake or halothane-anesthetized horses. J Am Vet Med Assoc 2004; 225:560-6. [PMID: 15344364 DOI: 10.2460/javma.2004.225.560] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To evaluate the cardiopulmonary and clinicopathologic effects of rapid IV administration of dimethyl sulfoxide (DMSO) in awake and halothane-anesthetized horses. DESIGN Prospective study. ANIMALS 6 adult horses. PROCEDURES Horses received IV infusion of 5 L of a balanced electrolyte solution with and without 1 g/kg (0.45 g/lb) of 10% DMSO solution when they were awake and anesthetized with halothane (4 treatments/horse). Arterial and venous blood samples were collected immediately before and at intervals during or after fluid administration and analyzed for blood gases and hematologic and serum biochemical variables, respectively. Heart rate, respiratory rate, and arterial blood pressure variables were recorded prior to, during, and after fluid administration. RESULTS After administration of fluid with or without DMSO, changes in measured variables were detected immediately, but most variables returned to baseline values within 4 hours. One awake control horse had signs of anxiety; agitation and tachycardia were detected in 2 awake horses administered DMSO. These clinical signs disappeared when the rate of infusion was reduced. In anesthetized horses, increased concentrations of WBCs and plasma fibrinogen and serum creatine kinase activity persisted for 24 hours, which was related to the stress of anesthesia more than the effects of fluid administration. CONCLUSIONS AND CLINICAL RELEVANCE Infusion of 5 L of balanced electrolyte solution with or without 10% DMSO induced minimal changes in cardiopulmonary function and clinicopathologic variables in either awake or halothane-anesthetized horses. Stress associated with anesthesia and recovery had a greater influence on measured variables in anesthetized horses than fluid administration.
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Affiliation(s)
- Hui-Chu Lin
- Department of Clinical Sciences. College of Veterinary Medicine, Auburn University, Auburn, AL 36849-5522, USA
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Balakin KV, Ivanenkov YA, Skorenko AV, Nikolsky YV, Savchuk NP, Ivashchenko AA. In silico estimation of DMSO solubility of organic compounds for bioscreening. ACTA ACUST UNITED AC 2004; 9:22-31. [PMID: 15006145 DOI: 10.1177/1087057103260006] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Solubility of organic compounds in DMSO is an important issue for commercial and academic organizations handling large compound collections or performing biological screening. In particular, solubility data are critical for the optimization of storage conditions and for the selection of compounds for bioscreening compatible with the assay protocol. Solubility is largely determined by the solvation energy and the crystal disruption energy, and these molecular phenomena should be assessed in structure-solubility correlation studies. The authors summarize our long-term experimental observations and theoretical studies of physicochemical determinants of DMSO solubility of organic substances. They compiled a comprehensive reference database of proprietary data on compound solubility (55,277 compounds with good DMSO solubility and 10,223 compounds with poor DMSO solubility), calculated specific molecular descriptors (topological, electromagnetic, charge, and lipophilicity parameters), and applied an advanced machine-learning approach for training neural networks to address the solubility. Both supervised (feed-forward, back-propagated neural networks) and unsupervised (Kohonen neural networks) learning methods were used. The resulting neural network models were validated by successfully predicting DMSO solubility of compounds in independent test selections.
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Kale S, Kocadereli I, Atilla P, Aşan E. Comparison of the effects of 1,25 dihydroxycholecalciferol and prostaglandin E2 on orthodontic tooth movement. Am J Orthod Dentofacial Orthop 2004; 125:607-14. [PMID: 15127030 DOI: 10.1016/j.ajodo.2003.06.002] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
This study compared the effects of local administrations of prostaglandin E2 (PGE2) and 1,25-dihydroxycholecalciferol (1,25-DHCC) on orthodontic tooth movement in rats. Thirty-seven 6-week-old male Sprague-Dawley rats, weighing 160 +/- 10 g were used. Five rats served as the baseline control group. A fixed appliance system exerting 20 g of distally directed force was applied on the maxillary incisors of 32 animals for 9 days. Eight rats served as the appliance control group; 8 received a 20-microL injection of dimethyl sulfoxide (solvent for 1,25-DHCC) on days 0, 3, and 6; 8 received 20 microL of 10(-10) mol/L 1,25-DHCC on days 0, 3, and 6; 8 received a single injection of 0.1 mL of 0.1 microg PGE2 only on day 0. There was no significant difference in tooth movement between the PGE2 and the 1,25-DHCC groups. Both PGE2 and 1,25-DHCC enhanced the amount of tooth movement significantly when compared with the control group. The numbers of Howship's lacunae and capillaries on the pressure side were significantly greater in the PGE2 group than in the 1,25-DHCC group. On the other hand, the number of osteoblasts on the external surface of the alveolar bone on the pressure side was significantly greater in the 1,25-DHCC group than in the PGE2 group. Thus, 1,25-DHCC was found to be more effective in modulating bone turnover during orthodontic tooth movement, because its effects on bone formation and bone resorption were well balanced.
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Affiliation(s)
- Selin Kale
- Department of Orthodontics, Gazi University Faculty of Dentistry, Ankara, Turkey
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Johnson DA, Ganz R, Aisenberg J, Cohen LB, Deviere J, Foley TR, Haber GB, Peters JH, Lehman GA. Endoscopic, deep mural implantation of Enteryx for the treatment of GERD: 6-month follow-up of a multicenter trial. Am J Gastroenterol 2003; 98:250-8. [PMID: 12591037 DOI: 10.1111/j.1572-0241.2003.07291.x] [Citation(s) in RCA: 73] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
OBJECTIVES This prospective, multicenter, single-arm study evaluated the safety and efficacy of the endoscopic implantation of Enteryx, a biocompatible, non-biodegradable liquid polymer for the treatment of GERD. METHODS Eighty-five patients with heartburn symptoms responsive to proton pump inhibitor (PPI) use were enrolled. Inclusion requirements were HRQL score < or = 11 on PPI and > or = 20 off PPI, and 24-hour PH probe with > or = 5% total time at PH < or = 4. Patients with a hiatus hernia > 3 cm, grade 3 or 4 esophagitis, or esophageal motility disorder were excluded. Using a 4-mm needle tipped catheter during standard endoscopy, implants were made in 3-4 quadrants deep into the wall of the cardia. Use of PPI medications, pH-metry, manometry, GERD symptoms, and patient quality of life were assessed over a 6-month follow-up period. RESULTS At 6 months, PPI use was eliminated in 74% and reduced by > 50% in 10% of patients. The median HRQL score improved from 24.0 pre-implant (baseline off PPIs) to 4.0 at 6 months (p < 0.001). Mean total esophageal acid exposure time was 9.5% pretherapy and 6.7% at 6 months (p < 0.001). Mean LES length increased from 2.0 cm at baseline to 3.0 cm posttherapy (p = 0.003). There were no clinically serious adverse events. Transient mild-to-moderate chest pain commonly occurred after implantation. CONCLUSIONS The endoscopic implantation of Enteryx is a safe and effective therapy for eliminating or decreasing the need for PPI medications, improving GERD symptoms and patient quality of life, and decreasing esophageal acid exposure among patients suffering from GERD.
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Affiliation(s)
- David A Johnson
- Division of Gastroenterology, Eastern Virginia School of Medicine, Norfolk 23502, USA
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Markarian SA, Poladyan AA, Kirakosyan GR, Trchounian AA, Bagramyan KA. Effect of diethylsulphoxide on growth, survival and ion exchange of Escherichia coli. Lett Appl Microbiol 2002; 34:417-21. [PMID: 12028422 DOI: 10.1046/j.1472-765x.2002.01112.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
AIMS To study the effect of diethylsulphoxide (DESO) on Escherichia coli growth, survival and ionic exchange in comparison with dimethylsulphoxide (DMSO). METHODS AND RESULTS Bacterial survival was estimated by counting colony-forming units and by the most probable number (five-tube) technique; the K+ and H+ transport and H(2) formation were determined electrochemically. Diethylsulphoxide at concentrations between 0.01 and 0.5% (w/v) stimulated and above 5% decreased the anaerobic growth rate and survival. 2H+ : K+ exchange and H(2) formation were lost at 5% DESO. At 0.05% DESO the kinetic characteristics of H+ : K+ exchange and H(2) formation were typical for Delta micro (H(+)) -dependent TrkA uncoupled with F(0)F(1) under respiration. CONCLUSIONS Diethylsulphoxide at low concentrations serves as an electron acceptor for an anaerobic respiratory chain stimulating bacterial growth and survival through the modulation of H+ : K+ exchange and H(2) formation activity. The effects of DESO were more pronounced than those of DMSO. SIGNIFICANCE AND IMPACT OF THE STUDY Diethylsulphoxide determines essential biological and therapeutic properties that make its application preferable.
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Affiliation(s)
- S A Markarian
- Department of Chemistry, Yerevan State University, Yerevan, Armenia
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Tanaka E, Ribeiro M, Megid J, Listoni F. Tris-EDTA no teste de sensibilidade antimicrobiana in vitro em amostras de Pseudomonas aeruginosa. ARQ BRAS MED VET ZOO 2002. [DOI: 10.1590/s0102-09352002000300020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Welsh BM, Mason RS, Halliday GM. Topical all-trans retinoic acid augments ultraviolet radiation-induced increases in activated melanocyte numbers in mice. J Invest Dermatol 1999; 112:271-8. [PMID: 10084301 DOI: 10.1046/j.1523-1747.1999.00510.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
We have previously shown that daily application of 0.05% retinoic acid to the backs of lightly pigmented, hairless HRA:Skh-2 mice increases melanogenesis resulting from exposure to solar-simulated ultraviolet radiation. In this study we show that as early as 1 wk following commencement of treatment, there is a 2- fold increase in the number of epidermal 3,4-dihydroxyphenylalanine positive melanocytes in retinoic acid and ultraviolet radiation treated HRA:Skh-2 mice compared with mice that received ultraviolet radiation only. This increased to a 2.9-fold difference by 6 wk. Retinoic acid also augmented ultraviolet radiation-stimulated melanogenesis, with a 4-fold increase being observed after only 2 wk. These findings were also seen in C57BL mice. Ultraviolet radiation and retinoic acid needed to be applied to the same skin site for the augmentation in melanocyte activation to occur. Ultraviolet B rather than ultraviolet A was mainly responsible for melanogenesis and the retinoic acid primarily increased ultraviolet B-induced melanogenesis. Furthermore, retinoic acid on it's own, in the absence of ultraviolet radiation caused a small but statistically significant increase in 3,4-dihydroxyphenylalanine positive melanocyte numbers and melanogenesis. Thus topical retinoic acid is a potent modulator of melanocyte activation. Alone it is able to increase the number of activated epidermal melanocytes and make melanocytes more sensitive to activation by ultraviolet B.
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Affiliation(s)
- B M Welsh
- Department of Medicine (Dermatology), University of Sydney at Royal Prince Alfred Hospital, Camperdown, New South Wales, Australia
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Gordeliy VI, Kiselev MA, Lesieur P, Pole AV, Teixeira J. Lipid membrane structure and interactions in dimethyl sulfoxide/water mixtures. Biophys J 1998; 75:2343-51. [PMID: 9788929 PMCID: PMC1299908 DOI: 10.1016/s0006-3495(98)77678-7] [Citation(s) in RCA: 104] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
In this paper we have investigated via x-ray diffraction the influence of dimethyl sulfoxide (DMSO), known for its biological and therapeutic properties, on the structure of lipid membranes of dipalmitoylphosphatidylcholine (DPPC) in excess of the solvent (DMSO/water) at mole DMSO fractions XDMSO in (0.1) and under equilibrium conditions. At small XDMSO </= 0.133 the repeat distance d is reduced remarkably, whereas wide-angle x-ray diffraction pattern remains almost unchanged with the increase in XDMSO. It agrees well with previous study (Yu and Quinn, 1995). At 0.133 < XDMSO < 0.3 the repeat period d reduces slowly; however, an orthorombic in-plane lattice of hydrocarbon chains transfers to a disordered quasihexagonal lattice. The increase in XDMSO from 0.3 up to approximately 0.9 leaves d almost unchanged, whereas it leads to less disordered packing of hydrocarbon chains. At XDMSO approximately 0.9, Lbeta' phase transfers into interdigitated phase. The chain-melting phase transition temperature of DPPC membranes increases by several degrees with the increase of DMSO concentration. It points to a strong concentration-dependent solvation of membrane surface by DMSO. Thus DMSO strongly interacts with the membrane surface, probably displacing water and modifying the structure of the lipid bilayer. It appears to determine some of the properties of DMSO as a biologically and therapeutically active substance.
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Affiliation(s)
- V I Gordeliy
- IBI-2, Structural Biology, Forschungszentrum Jülich, D-52425 Jülich, Germany.
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Bless NM, Tojo SJ, Kawarai H, Natsume Y, Lentsch AB, Padgaonkar VA, Czermak BJ, Schmal H, Friedl HP, Ward PA. Differing patterns of P-selectin expression in lung injury. THE AMERICAN JOURNAL OF PATHOLOGY 1998; 153:1113-22. [PMID: 9777942 PMCID: PMC1853061 DOI: 10.1016/s0002-9440(10)65655-6] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Using two models of acute lung inflammatory injury in rats (intrapulmonary deposition of immunoglobulin G immune complexes and systemic activation of complement after infusion of purified cobra venom factor), we have analyzed the requirements and patterns for upregulation of lung vascular P-selectin. In the immune complex model, upregulation of P-selectin was defined by Northern and Western blot analysis of lung homogenates, by immunostaining of lung tissue, and by vascular fixation of 125I-labeled anti-P-selectin. P-selectin protein was detected by 1 hour (long before detection of mRNA) and expression was sustained for the next 7 hours, in striking contrast to the pattern of P-selectin expression in the cobra venom factor model, in which upregulation was very transient (within the 1st hour). In the immune complex model, injury and neutrophil accumulation were P-selectin dependent. Upregulation of P-selectin was dependent on an intact complement system, and the presence of blood neutrophils was susceptible to the antioxidant dimethyl sulfoxide and required C5a but not tumor necrosis factor alpha. In contrast, in the cobra venom factor model, upregulation of P-selectin, which is C5a dependent, was also dimethyl sulfoxide sensitive but neutrophil independent. Different mechanisms that may explain why upregulation of lung vascular P-selectin is either transient or sustained are discussed.
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Affiliation(s)
- N M Bless
- Department of Traumatology, University of Freiburg, Germany
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MUHAMMAD G, KHAN MZ, ATHAR M. Clinico-Microbiological and Therapeutic Aspects of Glanders in Equines. J Equine Sci 1998. [DOI: 10.1294/jes.9.93] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Affiliation(s)
- Ghulam MUHAMMAD
- Department of Clinical Medicine and Surgery, Faculty of Veterinary Science, University of Agriculture, Faisalabad 38040, Pakistan
| | - M. Zargham KHAN
- Department of Clinical Medicine and Surgery, Faculty of Veterinary Science, University of Agriculture, Faisalabad 38040, Pakistan
| | - Muhammad ATHAR
- Department of Clinical Medicine and Surgery, Faculty of Veterinary Science, University of Agriculture, Faisalabad 38040, Pakistan
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Shimizu S, Simon RP, Graham SH. Dimethylsulfoxide (DMSO) treatment reduces infarction volume after permanent focal cerebral ischemia in rats. Neurosci Lett 1997; 239:125-7. [PMID: 9469672 DOI: 10.1016/s0304-3940(97)00915-4] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Dimethylsulfoxide (DMSO) is a common vehicle used for many drugs used in neuroprotective experiments. DMSO has many biological effects, including antiinflammatory, antioxidant, and local anesthetic effects that could be neuroprotective. To determine if DMSO is neuroprotective in ischemia, DMSO (0, 0.01, 0.03, 0.1, 0.3 and 1.0 ml) was administered intraperitoneally 30 min prior to permanent middle cerebral artery (MCA) occlusion in the rat. Twenty-four hours after MCA occlusion, brains were removed and sectioned. Mean infarction volume was significantly reduced in rats treated with 0.1, 0.3 and 1.0 ml of DMSO compared to saline controls. There was no acute effect of drug treatment upon arterial blood gasses or mean blood pressure. These results suggest that DMSO is neuroprotective in focal cerebral ischemia. Investigators must use appropriate controls when DMSO is used as a vehicle.
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Affiliation(s)
- S Shimizu
- Department of Neurology, University of Pittsburgh, PA 15261, USA
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Pan JB, Monteggia LM, Giordano T. Altered levels and splicing of the amyloid precursor protein in the adult rat hippocampus after treatment with DMSO or retinoic acid. BRAIN RESEARCH. MOLECULAR BRAIN RESEARCH 1993; 18:259-66. [PMID: 7684485 DOI: 10.1016/0169-328x(93)90198-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Alzheimer's disease and cognitive impairment in rats has been associated with an increase in the percentage of amyloid precursor protein (APP) containing the KPI domain. It has recently been reported that retinoic acid (RA) is capable of increasing the levels and altering the splicing ratio of APP in cultured SH-SY5Y cells. The effects of peripherally administered RA (64 or 640 micrograms/kg; i.p.; q.d.) on the abundance of APP, the ratio of the three major isoforms, and the relative abundance of nerve growth factor (NGF), brain derived neurotrophic factor (BDNF), and neurotrophin-3 (NT-3) were determined by rtPCR in the hippocampus of aged rats. Corresponding changes in choline acetyltransferase (ChAT) activity were also measured. Vehicle (DMSO) treated rats exhibited a 2 x (P < 0.01) increase in total APP and an 8 x (P < 0.001) decrease in the cyclophilin transcript. In addition, DMSO increased the percentage of APP 695 from 89% in saline treated rats to 94%. Treatment of RA in DMSO decreased the accumulation of total APP relative to cyclophilin at both the low (6.4 x; P < 0.01) and high (8 x; P < 0.05) dosages when compared to DMSO treated rats. Furthermore, the level of APP-695 decreased to 82% with low dosage of RA and 75% at high dosage of the total APP transcripts. No significant change in either NGF, NT-3, or BDNF transcripts were observed following low or high dosage RA administration relative to cyclophilin RNA nor was a change in ChAT activity detected at either of the dosages tested.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- J B Pan
- Abbott Laboratories, Abbott Park, IL 60064-3500
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Soper AK, Luzar A. A neutron diffraction study of dimethyl sulphoxide–water mixtures. J Chem Phys 1992. [DOI: 10.1063/1.463259] [Citation(s) in RCA: 216] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Ueki A, Tsushima H, Hyodoh F, Kinugawa K, Tomita M, Kazahaya J, Shirato R. Crocidolite asbestos suppresses the differentiation of HL-60 cells induced by DMSO. Cancer Lett 1992; 62:225-32. [PMID: 1317745 DOI: 10.1016/0304-3835(92)90100-a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
This study was undertaken to determine if the biological function of inducers for cell differentiation is affected by asbestos fibers, which are sometimes deposited in human tissues. Protein kinase C activity, c-myc protein expression and cell surface CR3 expression were used as the markers of cell differentiation. The function of dimethylsulfoxide (DMSO), an inducer of cell differentiation, was suppressed by the co-culturing of crocidolite asbestos, because DMSO reacted with the hydroxyl radical released after the stimulation with crocidolite and spent itself. Superoxide dismutase (SOD) inhibited the effect of crocidolite, reacting rapidly with .O2- before the secondary release of .OH. Asbestos fibers deposited in tissues may inhibit the function of inducers which stimulate immature cells to differentiate, because such inducers frequently are also radical scavengers.
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Affiliation(s)
- A Ueki
- Department of Hygiene, Kawasaki Medical School, Kurashiki, Japan
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Sapora O, Barone F, Belli M, Maggi A, Quintiliani M, Tabocchini MA. Relationships between cell killing, mutation induction and DNA damage in X-irradiated V79 cells: the influence of oxygen and DMSO. Int J Radiat Biol 1991; 60:467-82. [PMID: 1679087 DOI: 10.1080/09553009114552321] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The relationships between cell killing, mutation induction and DNA double (dsb) and single (ssb) strand breaks have been studied in V79 cells irradiated with X-rays under oxic and anoxic conditions in the presence and in the absence of dimethylsulphoxide (DMSO). Curvilinear relationships were found between all pairs of endpoints, except for dsb versus ssb. Statistical analysis of experimental data has shown that in the absence of DMSO there is evidence of good correlations between cell killing, mutation induction and dsb in oxic and anoxic conditions. However, when DMSO was present, no significant correlation was found. In the presence of oxygen DMSO always exerts a protective effect while in anoxia it is generally much less protective and induces a strong sensitization with respect to mutation induction. Possibly DMSO acts not only as a radical scavenger but also as an agent inducing chromatin relaxation and/or under anoxia, forming highly mutagenic short-term radicals. The present data suggest that lethal and mutational events are at least partially independent and not proportional to the initial number of DNA breaks. This may imply that either other kinds of lesions are involved in cell lethality and mutability, or dose-dependent repair mechanisms of dsb have to be considered.
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Affiliation(s)
- O Sapora
- Laboratorio di Tossicologia Comparata ed Ecotossicologia, Istituto Superiore di Sanita', Rome, Italy
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Shoaf AR, Shaikh AU, Harbison RD, Hinojosa O. Extraction and analysis of superoxide free radicals (.O2-) from whole mammalian liver. JOURNAL OF BIOLUMINESCENCE AND CHEMILUMINESCENCE 1991; 6:87-96. [PMID: 1652881 DOI: 10.1002/bio.1170060206] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Extraction of whole lobes of normal rat liver with dimethyl sulphoxide (DMSO) under N2 gives extracts which contain 5-10 mumol/l.O2- (50-100 nmol.O2- per 10 ml extract per 4 g liver; 1.25-2.50 nmol.O2- per millilitre per gram liver). Evidence for .O2- in the extracts is given by: (1) electron spin resonance signals (ESR), (2) differential pulse polarography (DPP), (3) chemiluminescence (CL), and (4) nitroblue tetrazolium reduction (NBT). All tests yield results identical with those obtained with authentic .O2-. Extraction of .O2- is enhanced by tetrabutyl ammonium ion, and is maximal at 1-3 min. These results raise the possibility that substantial amounts of .O2- are normally sequestered in protective membranous sites in vivo.
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Affiliation(s)
- A R Shoaf
- Health Protection Section, Bowman Gray School of Medicine, Wake Forest University, Winston-Salem, NC 27103
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