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Belblidia H, Freret T, Leger M, Schumann-Bard P. Time-course of age-related temporal order memory decline in an object recognition paradigm in mice. Behav Brain Res 2023; 437:114151. [PMID: 36216142 DOI: 10.1016/j.bbr.2022.114151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Revised: 09/25/2022] [Accepted: 10/06/2022] [Indexed: 11/07/2022]
Abstract
Temporal order memory refers to the ability to remember the order of occurrence of items across time. It is a critical feature of episodic memory that is often tested in rodents using spontaneous object recognition paradigms. However, impact of aging over performances of temporal order memory decline is barely known. Herein, we characterized here the effect of normal aging on the temporal order memory performances in NMRI mice between 3 and 19months of age, with an inter-session interval of 24h.We found that temporal order memory was impaired as soon as7 months of age. These results provide strong evidence that temporal order memory is particularly vulnerable to the deleterious effect of normal aging.
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Affiliation(s)
- Hassina Belblidia
- Normandie Univ, UNICAEN, INSERM, CYCERON, CHU Caen, COMETE UMR 1075, 14000 Caen, France; Université M'hamed Bougara UMBB, Faculté des Sciences, 35000 Boumerdès, Algeria
| | - Thomas Freret
- Normandie Univ, UNICAEN, INSERM, CYCERON, CHU Caen, COMETE UMR 1075, 14000 Caen, France
| | - Marianne Leger
- Normandie Univ, UNICAEN, INSERM, CYCERON, CHU Caen, COMETE UMR 1075, 14000 Caen, France
| | - Pascale Schumann-Bard
- Normandie Univ, UNICAEN, INSERM, CYCERON, CHU Caen, COMETE UMR 1075, 14000 Caen, France.
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Frick C, Fink S, Schmidbauer D, Rousset F, Eickhoff H, Tropitzsch A, Kramer B, Senn P, Glueckert R, Rask-Andersen H, Wiesmüller KH, Löwenheim H, Müller M. Age-Dependency of Neurite Outgrowth in Postnatal Mouse Cochlear Spiral Ganglion Explants. Brain Sci 2020; 10:brainsci10090580. [PMID: 32839381 PMCID: PMC7564056 DOI: 10.3390/brainsci10090580] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 08/18/2020] [Accepted: 08/19/2020] [Indexed: 12/22/2022] Open
Abstract
Background: The spatial gap between cochlear implants (CIs) and the auditory nerve limits frequency selectivity as large populations of spiral ganglion neurons (SGNs) are electrically stimulated synchronously. To improve CI performance, a possible strategy is to promote neurite outgrowth toward the CI, thereby allowing a discrete stimulation of small SGN subpopulations. Brain-derived neurotrophic factor (BDNF) is effective to stimulate neurite outgrowth from SGNs. Method: TrkB (tropomyosin receptor kinase B) agonists, BDNF, and five known small-molecule BDNF mimetics were tested for their efficacy in stimulating neurite outgrowth in postnatal SGN explants. To modulate Trk receptor-mediated effects, TrkB and TrkC ligands were scavenged by an excess of recombinant receptor proteins. The pan-Trk inhibitor K252a was used to block Trk receptor actions. Results: THF (7,8,3′-trihydroxyflavone) partly reproduced the BDNF effect in postnatal day 7 (P7) mouse cochlear spiral ganglion explants (SGEs), but failed to show effectiveness in P4 SGEs. During the same postnatal period, spontaneous and BDNF-stimulated neurite outgrowth increased. The increased neurite outgrowth in P7 SGEs was not caused by the TrkB/TrkC ligands, BDNF and neurotrophin-3 (NT-3). Conclusions: The age-dependency of induction of neurite outgrowth in SGEs was very likely dependent on presently unidentified factors and/or molecular mechanisms which may also be decisive for the age-dependent efficacy of the small-molecule TrkB receptor agonist THF.
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Affiliation(s)
- Claudia Frick
- Department of Otolaryngology, Head and Neck Surgery, Tübingen Hearing Research Centre, University of Tübingen Medical Center, 72076 Tübingen, Germany; (C.F.); (A.T.); (B.K.); (H.L.); (M.M.)
- Department of Microbiome Science, Max Planck Institute for Developmental Biology, 72076 Tübingen, Germany
| | - Stefan Fink
- Department of Otolaryngology, Head and Neck Surgery, Tübingen Hearing Research Centre, University of Tübingen Medical Center, 72076 Tübingen, Germany; (C.F.); (A.T.); (B.K.); (H.L.); (M.M.)
- Correspondence: ; Tel.: +49-7071-2988192
| | - Dominik Schmidbauer
- Inner Ear Laboratory Innsbruck, Medical University Innsbruck, 6020 Innsbruck, Austria; (D.S.); (R.G.)
| | - Francis Rousset
- The Inner Ear & Olfaction Lab, Department of Clinical Neurosciences, Faculty of Medicine, University of Geneva, 1206 Geneva, Switzerland; (F.R.); (P.S.)
| | - Holger Eickhoff
- EMC Microcollections GmbH, 72070 Tübingen, Germany; (H.E.); (K.-H.W.)
| | - Anke Tropitzsch
- Department of Otolaryngology, Head and Neck Surgery, Tübingen Hearing Research Centre, University of Tübingen Medical Center, 72076 Tübingen, Germany; (C.F.); (A.T.); (B.K.); (H.L.); (M.M.)
| | - Benedikt Kramer
- Department of Otolaryngology, Head and Neck Surgery, Tübingen Hearing Research Centre, University of Tübingen Medical Center, 72076 Tübingen, Germany; (C.F.); (A.T.); (B.K.); (H.L.); (M.M.)
- Department of Otolaryngology, Head and Neck Surgery, University Hospital Mannheim, 68167 Mannheim, Germany
| | - Pascal Senn
- The Inner Ear & Olfaction Lab, Department of Clinical Neurosciences, Faculty of Medicine, University of Geneva, 1206 Geneva, Switzerland; (F.R.); (P.S.)
| | - Rudolf Glueckert
- Inner Ear Laboratory Innsbruck, Medical University Innsbruck, 6020 Innsbruck, Austria; (D.S.); (R.G.)
- Tirol Kliniken Innsbruck, University Clinic of Otolaryngology, 6020 Innsbruck, Austria
| | - Helge Rask-Andersen
- Department of Surgical Sciences, Otorhinolaryngology and Head and Neck Surgery, University of Uppsala, 751 85 Uppsala, Sweden;
| | | | - Hubert Löwenheim
- Department of Otolaryngology, Head and Neck Surgery, Tübingen Hearing Research Centre, University of Tübingen Medical Center, 72076 Tübingen, Germany; (C.F.); (A.T.); (B.K.); (H.L.); (M.M.)
| | - Marcus Müller
- Department of Otolaryngology, Head and Neck Surgery, Tübingen Hearing Research Centre, University of Tübingen Medical Center, 72076 Tübingen, Germany; (C.F.); (A.T.); (B.K.); (H.L.); (M.M.)
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Hagl S, Asseburg H, Heinrich M, Sus N, Blumrich EM, Dringen R, Frank J, Eckert GP. Effects of Long-Term Rice Bran Extract Supplementation on Survival, Cognition and Brain Mitochondrial Function in Aged NMRI Mice. Neuromolecular Med 2016; 18:347-63. [PMID: 27350374 DOI: 10.1007/s12017-016-8420-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Accepted: 06/14/2016] [Indexed: 11/27/2022]
Abstract
Aging represents a major risk factor for the development of neurodegenerative diseases like Alzheimer's disease (AD). As mitochondrial dysfunction plays an important role in brain aging and occurs early in the development of AD, the prevention of mitochondrial dysfunction might help to slow brain aging and the development of neurodegenerative diseases. Rice bran extract (RBE) contains high concentrations of vitamin E congeners and γ-oryzanol. We have previously shown that RBE increased mitochondrial function and protected from mitochondrial dysfunction in vitro and in short-term in vivo feeding studies. To mimic the use of RBE as food additive, we have now investigated the effects of a long-term (6 months) feeding of RBE on survival, behavior and brain mitochondrial function in aged NMRI mice. RBE administration significantly increased survival and performance of aged NMRI mice in the passive avoidance and Y-maze test. Brain mitochondrial dysfunction found in aged mice was ameliorated after RBE administration. Furthermore, data from mRNA and protein expression studies revealed an up-regulation of mitochondrial proteins in RBE-fed mice, suggesting an increase in mitochondrial content which is mediated by a peroxisome proliferator-activated receptor gamma coactivator 1-alpha (PGC1α)-dependent mechanism. Our findings suggest that a long-term treatment with a nutraceutical containing RBE could be useful for slowing down brain aging and thereby delaying or even preventing AD.
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Affiliation(s)
- Stephanie Hagl
- Department of Pharmacology, Goethe-University, Biozentrum Niederursel, Max-von-Laue-Straße 9, 60438, Frankfurt, Germany
| | - Heike Asseburg
- Department of Pharmacology, Goethe-University, Biozentrum Niederursel, Max-von-Laue-Straße 9, 60438, Frankfurt, Germany
| | - Martina Heinrich
- Department of Pharmacology, Goethe-University, Biozentrum Niederursel, Max-von-Laue-Straße 9, 60438, Frankfurt, Germany
| | - Nadine Sus
- Institute of Biological Chemistry and Nutrition, University of Hohenheim, Garbenstraße 28, 70599, Stuttgart, Germany
| | - Eva-Maria Blumrich
- Centre for Biomolecular Interactions Bremen, University of Bremen, Bremen, Germany.,Centre for Environmental Research and Sustainable Technology, University of Bremen, Bremen, Germany
| | - Ralf Dringen
- Centre for Biomolecular Interactions Bremen, University of Bremen, Bremen, Germany.,Centre for Environmental Research and Sustainable Technology, University of Bremen, Bremen, Germany
| | - Jan Frank
- Institute of Biological Chemistry and Nutrition, University of Hohenheim, Garbenstraße 28, 70599, Stuttgart, Germany
| | - Gunter P Eckert
- Department of Pharmacology, Goethe-University, Biozentrum Niederursel, Max-von-Laue-Straße 9, 60438, Frankfurt, Germany. .,Institute of Nutritional Sciences, University of Giessen, Wilhelmstrasse 20, 35392, Giessen, Germany.
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Hagl S, Kocher A, Schiborr C, Kolesova N, Frank J, Eckert GP. Curcumin micelles improve mitochondrial function in neuronal PC12 cells and brains of NMRI mice - Impact on bioavailability. Neurochem Int 2015; 89:234-42. [PMID: 26254982 DOI: 10.1016/j.neuint.2015.07.026] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2015] [Revised: 07/27/2015] [Accepted: 07/31/2015] [Indexed: 01/19/2023]
Abstract
Curcumin, a polyphenolic compound abundant in the rhizome of Curcuma longa, has been reported to have various beneficial biological and pharmacological activities. Recent research revealed that curcumin might be valuable in the prevention and therapy of numerous disorders including neurodegenerative diseases like Alzheimer's disease. Due to its low absorption and quick elimination from the body, curcumin bioavailability is rather low which poses major problems for the use of curcumin as a therapeutic agent. There are several approaches to ameliorate curcumin bioavailability after oral administration, amongst them simultaneous administration with secondary plant compounds, micronization and micellation. We examined bioavailability in vivo in NMRI mice and the effects of native curcumin and a newly developed curcumin micelles formulation on mitochondrial function in vitro in PC12 cells and ex vivo in isolated mouse brain mitochondria. We found that curcumin micelles improved bioavailability of native curcumin around 10- to 40-fold in plasma and brain of mice. Incubation with native curcumin and curcumin micelles prevented isolated mouse brain mitochondria from swelling, indicating less mitochondrial permeability transition pore (mPTP) opening and prevention of injury. Curcumin micelles proved to be more efficient in preventing mitochondrial swelling in isolated mouse brain mitochondria and protecting PC12 cells from nitrosative stress than native curcumin. Due to their improved effectivity, curcumin micelles might be a suitable formulation for the prevention of mitochondrial dysfunction in brain aging and neurodegeneration.
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Affiliation(s)
- Stephanie Hagl
- Department of Pharmacology, Biozentrum Niederursel, Goethe University, Max-von-Laue-Str. 9, 60438 Frankfurt, Germany.
| | - Alexa Kocher
- Institute of Biological Chemistry and Nutrition, University of Hohenheim, Garbenstr. 28, 70599 Stuttgart, Germany
| | - Christina Schiborr
- Institute of Biological Chemistry and Nutrition, University of Hohenheim, Garbenstr. 28, 70599 Stuttgart, Germany
| | - Natalie Kolesova
- Department of Pharmacology, Biozentrum Niederursel, Goethe University, Max-von-Laue-Str. 9, 60438 Frankfurt, Germany
| | - Jan Frank
- Institute of Biological Chemistry and Nutrition, University of Hohenheim, Garbenstr. 28, 70599 Stuttgart, Germany
| | - Gunter P Eckert
- Department of Pharmacology, Biozentrum Niederursel, Goethe University, Max-von-Laue-Str. 9, 60438 Frankfurt, Germany
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Abstract
OBJECTIVES Aging represents a major risk factor for neurodegenerative diseases such as Alzheimer's disease. Mitochondria are significantly involved in both the aging process and neurodegeneration. One strategy to protect the brain and to prevent neurodegeneration is a healthy lifestyle including a diet rich in antioxidants and polyphenols. Rice bran extract (RBE) contains various antioxidants including natural vitamin E forms (tocopherols and tocotrienols) and gamma-oryzanol. In this work, we examined the effects of a stabilized RBE on mitochondrial function in 18-month-old Naval Medical Research Institute mice (340 mg/kg body weight/day), which received the extract for 3 weeks via oral gavage. METHODS Mitochondrial parameters were measured using high-resolution respirometry (Oroboros Oxygraph-2k), Western blot analysis, and photometric methods in dissociated brain cells, isolated mitochondria, and brain homogenate. Vitamin E concentrations in blood plasma and brain tissue were measured using HPLC with fluorescence detection. RESULTS Aging leads to decreased mitochondrial function (decreased mitochondrial respiration and ATP production) and decreased protein expression of peroxisome proliferator-activated receptor gamma coactivator 1-alpha (PGC1alpha). RBE administration increased alpha-tocopherol concentrations in the brain and compensated for age-related mitochondrial dysfunction by increasing mitochondrial respiration, membrane potential, PGC1alpha protein expression, and citrate synthase activity. Furthermore, resistance of brain cells to sodium nitroprusside-induced nitrosative stress was improved. DISCUSSION According to these results, RBE is a promising candidate nutraceutical for the prevention of age-related neurodegenerative diseases.
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Lotfi P, Yaghmaei P, Ebrahim-Habibi A. Cymene and Metformin treatment effect on biochemical parameters of male NMRI mice fed with high fat diet. J Diabetes Metab Disord 2015; 14:52. [PMID: 26146609 PMCID: PMC4490725 DOI: 10.1186/s40200-015-0182-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2015] [Accepted: 06/18/2015] [Indexed: 01/08/2023]
Abstract
Background The increasing prevalence of obesity is considered a serious global health threat. Mainly due to change of diet and reduced physical activity, obesity is an important risk factor for chronic diseases. A higher level of cytokines and a general inflammatory state has also been associated with this condition. With this regard, potential anti-obesity compounds with anti-inflammatory properties could be beneficial in better control of the disease. p-Cymene is a natural aromatic compound that has been shown to have anti-inflammatory properties, while the antidiabetic drug metformin has been observed to be effective as an aid for weight loss. In this study, the effect of these comounds was compared in a high fat diet treated mice model. Methods 48 adult NMRI mice were randomly divided into six groups: control group receiving a normal diet, high fat diet (HFD) fed control group, sham group receiving HFD and sunflower seed oil, Experimental group1 (E1) receiving HFD and 20 mg/kg metformin, Experimental group2 (E2) receiving 20 mg/kg metformin and 20 mg/kg p-cymene, Experimental group3 (E3) receiving 20 mg/kg p-cymene. Compounds were administered by intragastric gavage for 45 days. Results Non-fasting glucose serum levels, ALT, and ALP of E2 and E3 decreased significantly compared to HFD control group. In the E3 group, AST levels decrease was also significant. In E1, non-fasting glucose and TG serum levels decreased significantly compared to HFD control group. Histological observations on liver tissue showed an increase of lipid droplets in the HFD control group compared with the normal group, while upon treatment with the compounds, lipid droplets decreased and the cells appeared to be more ordered. Conclusion p-Cymene has a potential to ameliorate biochemical parameters in high fat diet treated mice, and its concurrent use with metformin was effective.
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Affiliation(s)
- Peyman Lotfi
- Department of Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Parichehreh Yaghmaei
- Department of Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Azadeh Ebrahim-Habibi
- Biosensor Research Center, Endocrinology and Metabolism Molecular-Cellular Sciences Institute, Tehran University of Medical Sciences, Shariati Hospital, North Kargar Avenue, 1411413137 Tehran, Iran ; Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
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Belblidia H, Abdelouadoud A, Jozet-Alves C, Dumas H, Freret T, Leger M, Schumann-Bard P. Time decay of object, place and temporal order memory in a paradigm assessing simultaneously episodic-like memory components in mice. Behav Brain Res 2015; 286:80-4. [PMID: 25732955 DOI: 10.1016/j.bbr.2015.02.043] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2014] [Revised: 02/15/2015] [Accepted: 02/20/2015] [Indexed: 01/07/2023]
Abstract
A common trait of numerous memory disorders is the impairment of episodic memory. Episodic memory is a delay-dependant memory, especially associating three components, the "what", "where" and "when" of a unique event. To investigate underlying mechanisms of such memory, several tests, mainly based on object exploration behaviour, have been set up in rodents. Recently, a three-trial object recognition task has been proposed to evaluate simultaneously the different components of episodic-like memory in rodents. However, to date, the time course of each memory component in this paradigm is not known. We characterised here the time course of memory decay in adult mice during the three-trial object recognition task, with inter-trial interval (ITI) ranging from 1h to 4h. We found that, with 1h and 2h, but not 4h ITI, mice spent more time to explore the displaced "old object" relative to the displaced "recent object", reflecting memory for "what and when". Concomitantly, animals exhibited more exploration time for the displaced "old object" relative to the stationary "old object", reflecting memory for "what and where". These results provide strong evidence that mice establish an integrated memory for unique experience consisting of the "what", "where" and "when" that can persist until 2h ITI.
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Affiliation(s)
- Hassina Belblidia
- Normandie Universités, Université de Caen Basse-Normandie, Groupe Mémoire et Plasticité comportementale (GMPc), EA 4259, F-14032 Caen, France; Université des Sciences et de la Technologie Houari Boumediene, Laboratoire de Neurosciences Comportementales et Cognitives, 16111 Alger, Algeria
| | - Abdelmalek Abdelouadoud
- Université des Sciences et de la Technologie Houari Boumediene, Laboratoire de Neurosciences Comportementales et Cognitives, 16111 Alger, Algeria
| | - Christelle Jozet-Alves
- Normandie Universités, Université de Caen Basse-Normandie, Groupe Mémoire et Plasticité comportementale (GMPc), EA 4259, F-14032 Caen, France
| | - Hélène Dumas
- Normandie Universités, Université de Caen Basse-Normandie, Groupe Mémoire et Plasticité comportementale (GMPc), EA 4259, F-14032 Caen, France
| | - Thomas Freret
- Normandie Universités, Université de Caen Basse-Normandie, Groupe Mémoire et Plasticité comportementale (GMPc), EA 4259, F-14032 Caen, France
| | - Marianne Leger
- Normandie Universités, Université de Caen Basse-Normandie, Groupe Mémoire et Plasticité comportementale (GMPc), EA 4259, F-14032 Caen, France
| | - Pascale Schumann-Bard
- Normandie Universités, Université de Caen Basse-Normandie, Groupe Mémoire et Plasticité comportementale (GMPc), EA 4259, F-14032 Caen, France.
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Jaffary F, Changizi V, Mardani H, Kakanezhadian P, Javadi FM, Nilforoushzadeh MA, Haftbaradaran E. Macroscopic effect of blue light cure on wound healing in NMRI mice NMRI. Adv Biomed Res 2014; 3:106. [PMID: 24804180 PMCID: PMC4009753 DOI: 10.4103/2277-9175.129699] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2013] [Accepted: 03/12/2014] [Indexed: 11/05/2022] Open
Abstract
Background: Wound healing is a complex process and has been an ongoing challenge all over the world. Some studies have suggested light cure as a modality to accelerate wound repair. It can induce fibroblast proliferation, increase collagen synthesis and activate cellular processes involved in expression of procollagen type I and III mRNA. This study was designed to assess the macroscopic effect of halogen dental curing blue light on full-thickness open wound healing in NMRI mice. Materials and Methods: Forty male NMRI mice were divided into control and treatment groups. A full-thickness wound of 6 mm in diameter was induced on the lower back of all mice under general anesthesia and sterile conditions. The mice of the treatment group received a 5-min exposure of halogen light Coltolux II (QHL), 420-500 nm, daily for 7 days. The diameter of the wound was measured in both the treatment and the control groups every second day up to Day 14. Data were analyzed by SPSS version 12 software using Student's t-test. A significance level of P ≤ 0.05 was considered for each comparison. Results: There was a significant difference in wound diameter between the control and the treatment groups at all measurements after Day 3 (P ≤ 0/05). Conclusion: The results of this study suggest improvement of full-thickness wound healing by daily irradiation of halogen dental curing blue light of 420-500 nm for 7 days.
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Affiliation(s)
- Fariba Jaffary
- Department of Physiology and Biophysics, Islamic Azad University of Tehran, Tehran, Iran
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Nilsson MKL, Carlsson ML. The monoaminergic stabilizer (-)-OSU6162 reverses delay-dependent natural forgetting and improves memory impairment induced by scopolamine in mice. Neuropharmacology 2013; 75:399-406. [PMID: 23994443 DOI: 10.1016/j.neuropharm.2013.08.017] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2013] [Revised: 08/05/2013] [Accepted: 08/18/2013] [Indexed: 12/14/2022]
Abstract
The aim of the present study was to evaluate the effect of the monoaminergic stabilizer (-)-OSU6162 on spatial recognition memory. Male NMRI mice were tested in the object location model which is based on the animals' inherent interest to examine changes in their environment: The animals' propensity to explore relocated objects in relation to unaltered objects, presented in two different sessions (sample and trial), was studied. In a first series of experiments the effect of (-)-OSU6162 on natural forgetting was evaluated. With an inter-session interval (ISI) of 30 min or an hour, untreated mice spent longer time exploring the displaced object, but when the time between sessions was as long as 6 h, the mice did not identify the displaced object. However, using the 6 h ISI design we found that (-)-OSU6162 in doses up to 30 μmol/kg, given directly after the sample session, caused an increased interest for the displaced object. Twenty-four hours after administration, (-)-OSU6162 was still effective in facilitating identification of the displaced object. We also evaluated the effect of (-)-OSU6162 on scopolamine-induced memory deficits in this model - the two agents were given 30 min before the sample session and the ISI was one hour. Under these conditions scopolamine induced a deficit in object location memory and this effect was counteracted by (-)-OSU6162. The data from the present study suggest that (-)-OSU6162 prolongs object location memory in normal mice and reverses scopolamine-induced memory deficits. (-)-OSU6162 might be a valuable drug candidate for memory deficits and other cognitive impairments.
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Affiliation(s)
- Marie K L Nilsson
- Institute of Neuroscience and Physiology, The Sahlgrenska Academy at the University of Gothenburg, Sahlgrenska Science Park, Medicinaregatan 8A, 413 46 Gothenburg, Sweden.
| | - Maria L Carlsson
- Institute of Neuroscience and Physiology, The Sahlgrenska Academy at the University of Gothenburg, Sahlgrenska Science Park, Medicinaregatan 8A, 413 46 Gothenburg, Sweden
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Safaeian L, Jafarian-Dehkordi A, Rabbani M, Sadeghi H, Afshar-Moghaddam N, Sarahroodi S. Comparison of bleomycin-induced pulmonary apoptosis between NMRI mice and C57BL/6 mice. Res Pharm Sci 2013; 8:43-50. [PMID: 24459475 PMCID: PMC3895299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
Abstract
Apoptosis has a critical role in the pathogenesis of bleomycin induced-pulmonary fibrosis. The severity of fibrosis varies among different strains of mice. Recent studies have indicated that expression of apoptotic regulatory genes may be specific in different cell types in various strains. In this study, bleomycin-induced pulmonary apoptosis in NMRI (Naval Medical Research Institute, USA) albino mice were compared with C57BL/6 black mice. Pulmonary fibrosis induced by single intratracheal administration of bleomycin (3 U/kg). Control mice were instilled with the same volume of saline. After 2 weeks, fibrotic responses were studied by biochemical measurement of collagen deposition and histological examination of pathological lung changes. Apoptosis was detected and quantitated by terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling (TUNEL) assay. Bleomycin significantly (P<0.05) increased lung collagen content and also induced fibrotic histological changes in both strains. Apoptosis was detected in the bronchiolar and alveolar epithelial cells after bleomycin instillation. TUNEL-positive alveolar epithelial cells in bleomycin-treated lungs of C57BL/6 and NMRI mice (19.5% + 2.7 and 17% + 2.0, respectively) were significantly (P<0.05) higher than that of saline-treated lungs (1.5% + 0.5) with no significant difference between two strains of mice (P>0.05). Despite some murine strain variation in the expression of apoptotic regulatory genes in bleomycin-induced pulmonary fibrosis, the results of the present study revealed no significant differences in alveolar epithelial apoptosis between NMRI and C57BL/6 black mice. However, these results confirm the role of apoptosis in the pathogenesis of pulmonary fibrosis and suitability of both strains as experimental models of lung fibrosis.
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Affiliation(s)
- L. Safaeian
- Department of Pharmacology and Toxicology and Isfahan Pharmaceutical Sciences Research Center, School of Pharmacy and Pharmaceutical Sciences, Isfahan University of Medical Sciences, Isfahan, I.R. Iran,
Corresponding author: L. Safaeian Tel. 0098 311 7922596, Fax. 0098 311 6680011 E-mail:
| | - A. Jafarian-Dehkordi
- Department of Pharmacology and Toxicology and Isfahan Pharmaceutical Sciences Research Center, School of Pharmacy and Pharmaceutical Sciences, Isfahan University of Medical Sciences, Isfahan, I.R. Iran
| | - M. Rabbani
- Department of Pharmacology and Toxicology and Isfahan Pharmaceutical Sciences Research Center, School of Pharmacy and Pharmaceutical Sciences, Isfahan University of Medical Sciences, Isfahan, I.R. Iran
| | - H.M. Sadeghi
- Department of Pharmaceutical Biotechnology, School of Pharmacy and Pharmaceutical Sciences, Isfahan University of Medical Sciences, Isfahan, I.R. Iran
| | - N. Afshar-Moghaddam
- Department of Pathology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, I.R. Iran
| | - S. Sarahroodi
- Department of pharmacology, School of Medicine, Qom University of Medical Sciences, Qom, I.R. Iran
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