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Nilsson S, Deng M, Kutrolli E, Motamedi M, Olivecrona G, Kersten S. Silencing of ANGPTL4 via antisense oligonucleotides effectively reduces plasma triglyceride and glucose levels in mice without causing lymphadenopathy. Atherosclerosis 2022. [DOI: 10.1016/j.atherosclerosis.2022.06.069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Motamedi M, Mohammadkhah S, Ramezanzadeh M, Eivaz Mohammadloo H, Ramezanzadeh B. Designing Hybrid Mesoporous Pr/Tannate-Inbuilt ZIF8-Decorated MoS 2 as Novel Nanoreservoirs toward Smart pH-Triggered Anti-corrosion/Robust Thermomechanical Epoxy Nanocoatings. ACS Appl Mater Interfaces 2022; 14:31170-31193. [PMID: 35762777 DOI: 10.1021/acsami.2c08781] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
For the first time, organic tannic acid (TA) molecules and then inorganic praseodymium (Pr) cations as corrosion inhibitors were successfully loaded into a zeolitic imidazolate framework (ZIF8)-type porous coordination polymer (PCP) decorated on molybdenum disulfide, MoS2, (MS)-based transition metal dichalcogenides (TMDs) to create novel hybrid mesoporous Pr/TA-ZIF8@MS nanoreservoirs. Thereafter, the hybrid nanoreservoirs were embedded into the epoxy matrix for the preparation of smart pH-triggered nanocoatings. Characterizations of the Pr/TA-ZIF8@MS nanoreservoirs via Fourier transform infrared (FT-IR), X-ray diffraction (XRD), thermogravimetric (TG), Brunauer-Emmett-Teller (BET), and field emission-scanning electron microscopy (FE-SEM)/energy-dispersive X-ray spectroscopy (EDS) experiments confirmed the fabrication of mesoporous structures comprising Pr/TA interfacial interactions with ZIF8-decorated MS nanoplatelets possessing high thermal stability and compact/dense configuration features with a framework reorientation. A remarkable smart release of the inhibited cations (Pr3+ and Zn2+) in the presence of inbuilt TA at both acidic and alkaline media was achieved under inductively coupled plasma (ICP) examination. The superior pH-triggered self-healing inhibition through the smart controlled-release of Pr, tannate, Zn, and imidazole inhibited species/complexes from EP/Pr-TA-ZIF8@MS via ligand exchange was obtained from electrochemical impedance spectroscopy (EIS) assessments of the scratched coatings during 72 h of saline immersion. In addition, the long-term barrier-induced corrosion prevention (log |Z|10 mHz = 10.49 Ω·cm2 after 63 days) of the EP/Pr-TA-ZIF8@MS was actualized. Moreover, efficient increments of the coating cross-link density (56.45%), tensile strength (63.6%), and toughness value (56.5%) compared to the Neat epoxy coating revealed noticeable thermomechanical properties of the EP/Pr-TA-ZIF8@MS.
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Affiliation(s)
- Milad Motamedi
- Department of Surface Coating and Corrosion, Institute for Color Science and Technology, Tehran, P.O. Box 16765-654, Iran
| | - Sahel Mohammadkhah
- Department of Surface Coating and Corrosion, Institute for Color Science and Technology, Tehran, P.O. Box 16765-654, Iran
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27606, United States
| | - Mohammad Ramezanzadeh
- Department of Surface Coating and Corrosion, Institute for Color Science and Technology, Tehran, P.O. Box 16765-654, Iran
| | - Hossein Eivaz Mohammadloo
- Color, Resin & Surface Coatings Department, Iran Polymer and Petrochemical Institute, Tehran, P.O. Box 14965-115, Iran
| | - Bahram Ramezanzadeh
- Department of Surface Coating and Corrosion, Institute for Color Science and Technology, Tehran, P.O. Box 16765-654, Iran
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Roushan J, Arzani M, Ghanaei A, Mashhadi A, Motamedi M, Karvigh S. HD-tDCS in patients with refractory left focal LTE: cognitive performance. Brain Stimul 2019. [DOI: 10.1016/j.brs.2018.12.887] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
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Motamedi M, Ramezanzadeh B, Mahdavian M. Corrosion inhibition properties of a green hybrid pigment based on Pr-Urtica Dioica plant extract. J IND ENG CHEM 2018. [DOI: 10.1016/j.jiec.2018.05.021] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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Alibakhshi E, Ramezanzadeh M, Bahlakeh G, Ramezanzadeh B, Mahdavian M, Motamedi M. Glycyrrhiza glabra leaves extract as a green corrosion inhibitor for mild steel in 1 M hydrochloric acid solution: Experimental, molecular dynamics, Monte Carlo and quantum mechanics study. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.01.144] [Citation(s) in RCA: 204] [Impact Index Per Article: 34.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Petrova EV, Brecht HP, Motamedi M, Oraevsky AA, Ermilov SA. In vivo optoacoustic temperature imaging for image-guided cryotherapy of prostate cancer. Phys Med Biol 2018; 63:064002. [PMID: 29480808 DOI: 10.1088/1361-6560/aab241] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The objective of this study is to demonstrate in vivo the feasibility of optoacoustic temperature imaging during cryotherapy of prostate cancer. We developed a preclinical prototype optoacoustic temperature imager that included pulsed optical excitation at a wavelength of 805 nm, a modified clinical transrectal ultrasound probe, a parallel data acquisition system, image processing and visualization software. Cryotherapy of a canine prostate was performed in vivo using a commercial clinical system, Cryocare® CS, with an integrated ultrasound imaging. The universal temperature-dependent optoacoustic response of blood was employed to convert reconstructed optoacoustic images to temperature maps. Optoacoustic imaging of temperature during prostate cryotherapy was performed in the longitudinal view over a region of 30 mm (long) × 10 mm (deep) that covered the rectum, the Denonvilliers fascia, and the posterior portion of the treated gland. The transrectal optoacoustic images showed high-contrast vascularized regions, which were used for quantitative estimation of local temperature profiles. The constructed temperature maps and their temporal dynamics were consistent with the arrangement of the cryoprobe and readouts of the thermal needle sensors. The temporal profiles of the readouts from the thermal needle sensors and the temporal profile estimated from the normalized optoacoustic intensity of the selected vascularized region showed significant resemblance, except for the initial overshoot, that may be explained as a result of the physiological thermoregulatory compensation. The temperature was mapped with errors not exceeding ±2 °C (standard deviation) consistent with the clinical requirements for monitoring cryotherapy of the prostate. In vivo results showed that the optoacoustic temperature imaging is a promising non-invasive technique for real-time imaging of tissue temperature during cryotherapy of prostate cancer, which can be combined with transrectal ultrasound-the current standard for guiding clinical cryotherapy procedure.
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Affiliation(s)
- E V Petrova
- Tomowave Laboratories, Inc., 6550 Mapleridge St, Ste 124, Houston, TX 77081-4629, United States of America. Present address: Department of Medicine, Baylor College of Medicine, 1 Baylor Plaza, Houston, TX 77030, United States of America
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Ghiaie Asl I, Motamedi M, Shokuhi GR, Jalalizand N, Farhang A, Mirhendi H. Molecular characterization of environmental Cladosporium species isolated from Iran. Curr Med Mycol 2018. [PMID: 29302623 PMCID: PMC5747582 DOI: 10.29252/cmm.3.1.1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Background and Purpose: Cladosporium species are ubiquitous, saprobic, dematiaceous fungi, only infrequently associated with human and animal opportunistic infections. Materials and Methods: Airborne samples were collected using the settle plate method, and soil samples were obtained from a depth of 5-10 cm of the superficial soil layer. Samples were cultured on Sabouraud dextrose agar (SDA) plates, incubated at 25°C, and examined daily for fungal colonies for two to three weeks. Isolates were identified as Cladosporium species according to the macroscopic and microscopic criteria. For species differentiation, DNA from 53 isolates was extracted and subjected to amplification of the internal transcribed spacer (ITS) region followed by sequencing. Results: A total of 270 samples were collected from various environmental sources, of which 79 strains of Cladosporium species were isolated. The most frequent species was C. cladosporioides (50.6%), followed by C. iridis (44.3%), C. elatum (2.5%), C. peranqestum (1.3%), and C. alicinum (1.3%). Conclusion: The collected data can serve as baseline information for future research and may be useful in the development of preventive and educational strategies.
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Affiliation(s)
- I Ghiaie Asl
- Department of Medical Parasitology and Mycology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - M Motamedi
- Department of Medical Parasitology and Mycology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - G R Shokuhi
- Department of Medical Parasitology and Mycology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - N Jalalizand
- Department of Medical Parasitology and Mycology, School of Public Health, National Institute of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - A Farhang
- Department of Medical Parasitology and Mycology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - H Mirhendi
- Department of Medical Parasitology and Mycology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
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Ghiaie Asl I, Motamedi M, Shokuhi GR, Jalalizand N, Farhang A, Mirhendi H. Molecular characterization of environmental Cladosporium species isolated from Iran. Curr Med Mycol 2018; 3:1-5. [PMID: 29302623 DOI: 10.18869/acadpub.cmm.3.1.1] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Background and Purpose Cladosporium species are ubiquitous, saprobic, dematiaceous fungi, only infrequently associated with human and animal opportunistic infections. Materials and Methods Airborne samples were collected using the settle plate method, and soil samples were obtained from a depth of 5-10 cm of the superficial soil layer. Samples were cultured on Sabouraud dextrose agar (SDA) plates, incubated at 25°C, and examined daily for fungal colonies for two to three weeks. Isolates were identified as Cladosporium species according to the macroscopic and microscopic criteria. For species differentiation, DNA from 53 isolates was extracted and subjected to amplification of the internal transcribed spacer (ITS) region followed by sequencing. Results A total of 270 samples were collected from various environmental sources, of which 79 strains of Cladosporium species were isolated. The most frequent species was C. cladosporioides (50.6%), followed by C. iridis (44.3%), C. elatum (2.5%), C. peranqestum (1.3%), and C. alicinum (1.3%). Conclusion The collected data can serve as baseline information for future research and may be useful in the development of preventive and educational strategies.
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Affiliation(s)
- I Ghiaie Asl
- Department of Medical Parasitology and Mycology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - M Motamedi
- Department of Medical Parasitology and Mycology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - G R Shokuhi
- Department of Medical Parasitology and Mycology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - N Jalalizand
- Department of Medical Parasitology and Mycology, School of Public Health, National Institute of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - A Farhang
- Department of Medical Parasitology and Mycology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - H Mirhendi
- Department of Medical Parasitology and Mycology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
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Pakshir K, Mohamadi T, Khodadadi H, Motamedifar M, Zomorodian K, Alipour S, Motamedi M. Proteolytic activity and cooperative hemolytic effect of dermatophytes with different species of bacteria. Curr Med Mycol 2016; 2:9-14. [PMID: 28959790 PMCID: PMC5611691 DOI: 10.18869/acadpub.cmm.2.4.9] [Citation(s) in RCA: 3] [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] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND AND PURPOSE Globally, dermatophytes are the most common filamentous group of fungi causing cutaneous mycoses. Dermatophytes were shown to secrete a multitude of enzymes that play a role in their pathogenesis. There is limited data on co-hemolytic (CAMP-like) effect of different bacterial species on dermatophyte species. In this study, we sought to the evaluate exoenzyme activity and co-hemolytic effect of four bacteria on clinical dermatophytes isolated from patients in Shiraz, Iran. MATERIALS AND METHODS A total of 84 clinical dermatophyte species were isolated from patients suffering dermatophytosis and identified by conventional methods. Hemolytic activity was evaluated with Columbia 5% sheep blood agar. Proteolytic activity was determined by plate clearance assay method, using gelatin 8% agar. CAMP-like factor was evaluated with four bacteria, namely, S. areus, S.saprophyticus, S.pyogenes, and S.agalactiae. Fisher's exact test was run for statistical analysis. RESULTS T. mentagrophytes was the most predominant agent (27 [32.1%]) followed by T. verrucosum(20 [23.8%]), T. tonsurans (10 [11.9%]), Microsporum canis (7 [8.3%]), T. rubrum (6 [7.1%]), E. floccosum (6 [7.1%]), M. gypseum (5 [6%]), and T. violaceum (3[3.6%]). The most common clinical area of dermatophytosis was the skin. All the isolates expressed the zone of incomplete alpha hemolysis. All the isolates had CAMP- positive reaction with S. aureus and the other bacteria were CAMP-negative. All the isolates expressed proteolytic activity and no significant differences were noted among diverse genera of dermatophytes and severities of proteolytic activity. CONCLUSION This study indicated that hemolysin and proteolytic enzymes potentially play a role in dermatophyte pathogenesis and S. aureus could be considered as a main bacterium for creation of co-hemolytic effect in association with dermatophyte species.
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Affiliation(s)
- K Pakshir
- Department of Parasitology and Mycology, Basic Sciences in Infectious Diseases Research Center, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - T Mohamadi
- Department of Parasitology and Mycology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - H Khodadadi
- Department of Parasitology and Mycology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - M Motamedifar
- Department of Bacteriology and Virology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - K Zomorodian
- Department of Parasitology and Mycology, Basic Sciences in Infectious Diseases Research Center, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - S Alipour
- Department of Parasitology and Mycology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - M Motamedi
- Department of Parasitology and Mycology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
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Mirhendi H, Zarei F, Motamedi M, Nouripour-Sisakht S. Aspergillus tubingensis and Aspergillus niger as the dominant black Aspergillus, use of simple PCR-RFLP for preliminary differentiation. J Mycol Med 2016; 26:9-16. [PMID: 26852194 DOI: 10.1016/j.mycmed.2015.12.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2015] [Revised: 12/01/2015] [Accepted: 12/07/2015] [Indexed: 12/20/2022]
Abstract
This work aimed to identify the species distribution of common clinical and environmental isolates of black Aspergilli based on simple restriction fragment length polymorphism (RFLP) analysis of the β-tubulin gene. A total of 149 clinical and environmental strains of black Aspergilli were collected and subjected to preliminary morphological examination. Total genomic DNAs were extracted, and PCR was performed to amplify part of the β-tubulin gene. At first, 52 randomly selected samples were species-delineated by sequence analysis. In order to distinguish the most common species, PCR amplicons of 117 black Aspergillus strains were identified by simple PCR-RFLP analysis using the enzyme TasI. Among 52 sequenced isolates, 28 were Aspergillus tubingensis, 21 Aspergillus niger, and the three remaining isolates included Aspergillus uvarum, Aspergillus awamori, and Aspergillus acidus. All 100 environmental and 17 BAL samples subjected to TasI-RFLP analysis of the β-tubulin gene, fell into two groups, consisting of about 59% (n=69) A. tubingensis and 41% (n=48) A. niger. Therefore, the method successfully and rapidly distinguished A. tubingensis and A. niger as the most common species among the clinical and environmental isolates. Although tardy, the Ehrlich test was also able to differentiate A. tubingensis and A. niger according to the yellow color reaction specific to A. niger. A. tubingensis and A. niger are the most common black Aspergillus in both clinical and environmental isolates in Iran. PCR-RFLP using TasI digestion of β-tubulin DNA enables rapid screening for these common species.
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Affiliation(s)
- H Mirhendi
- Department of Medical Parasitology and Mycology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran.
| | - F Zarei
- Department of Medical Parasitology and Mycology, School of Public Health, National Institute of Health Research, Tehran University of Medical Sciences, Tehran, Iran
| | - M Motamedi
- Department of Medical Parasitology and Mycology, School of Public Health, National Institute of Health Research, Tehran University of Medical Sciences, Tehran, Iran
| | - S Nouripour-Sisakht
- Cellular and Molecular Research Center, Yasuj University of Medical Sciences, Yasuj, Iran
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Motamedi M, Attar MM. Nanostructured vanadium-based conversion treatment of mild steel substrate: formation process via noise measurement, surface analysis and anti-corrosion behavior. RSC Adv 2016. [DOI: 10.1039/c6ra06064a] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The bath pH, vanadia solution concentration and immersion time were optimized for the chemical surface treatment of ST12 mild steel by vanadium-based conversion coating (VCC). Nano-sized vanadium oxide/hydroxide particles were found to form on the steel surface.
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Affiliation(s)
- M. Motamedi
- Department of Polymer Engineering and Color Technology
- Amirkabir University of Technology
- Tehran
- Iran
| | - M. M. Attar
- Department of Polymer Engineering and Color Technology
- Amirkabir University of Technology
- Tehran
- Iran
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Pakshir K, Zomorodian K, Zakaei A, Motamedi M, Rahimi Ghiasi M, Karamitalab M. Molecular identification and in-vitro antifungal susceptibility testing of Candida species isolated from patients with onychomycosis. Curr Med Mycol 2015; 1:26-32. [PMID: 28681001 PMCID: PMC5490278 DOI: 10.18869/acadpub.cmm.1.4.26] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [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] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND AND PURPOSE Candida species are the most opportunistic fungi affecting the nails and resulting in onychomycosis. In this study, we identified and evaluated in-vitro susceptibility of the recovered isolates against fluconazole (FLC), voriconazole (VRC), and clotrimazole (CLT) using the Clinical and Laboratory Standards Institute (CLSI) M27-A3 document. MATERIALS AND METHODS From patients with either clinically or mycologically proven onychomycosis, 97 isolates comprising of seven Candida species were isolated, which were identified by both conventional and molecular techniques such as polymerase chain reaction-restriction fragment length polymorphism. In addition, Candida dubliniensis was confirmed by restriction endonuclease analysis. Antifungal susceptibility of each isolate against the three azoles applied in this study was determined using the CLSI microdilution reference method M27-A3. RESULTS Candida parapsilosis(C. parapsilosis) was the most frequently isolated species (n=44), followed by C. albicans (n=23), C.tropicalis (n=13), C.glabrata (n=7), C.krusei (n=6), C.guilliermondii (n=3), and C. dubliniensis (n=1). All the isolates were susceptible to CLT. VRC had lower minimum inhibitory concentration (MIC) values for the isolates compared to FLC. Geometric mean MIC values of VRC, FLC, and CLT for C. parapsilosis isolates were 0.07 μg/ml, 0.8 μg/ml, and 0.35 μg/ml, respectively. Collectively, all species exhibited greater susceptibility to VRC in comparison to C. albicans (P≤0.001). CONCLUSION This study showed that non-albicansCandida species were the most common etiologic agents of non-dermatophyte onychomycosis. The major antifungal agents used in clinics to empirically treat yeast onychomycosis are FLC and CLT. Our data suggested that CLT is a better choice for the treatment of Candida onychomycosis, especially in drug resistant cases.
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Affiliation(s)
- K Pakshir
- Basic Sciences in Infectious Diseases Research Center, Department of Parasitology and Mycology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - K Zomorodian
- Basic Sciences in Infectious Diseases Research Center, Department of Parasitology and Mycology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - A Zakaei
- Department of Parasitology and Mycology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - M Motamedi
- Department of Parasitology and Mycology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - M Rahimi Ghiasi
- Department of Parasitology and Mycology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - M Karamitalab
- Department of Parasitology and Mycology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
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Borahay M, Kilic G, Vincent K, Motamedi M, Boehning D. Simvastatin Reduces Fibroid Tumor Size in a Xenograft Animal Model. J Minim Invasive Gynecol 2014. [DOI: 10.1016/j.jmig.2014.08.103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Alavi G, Alavi A, Saberfiroozi M, Sarbazi A, Motamedi M, Hamedani S. Dental Erosion in Patients with Gastroesophageal Reflux Disease (GERD) in a Sample of Patients Referred to the Motahari Clinic, Shiraz, Iran. J Dent (Shiraz) 2014; 15:33-38. [PMID: 24738088 PMCID: PMC3986576] [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] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
STATEMENT OF PROBLEM Systematic reviews of the literature show that the dental erosion is associated with the gastroesophageal reflux disease (GERD).The prevalence of the problem may not be exclusively similar in different countries. PURPOSE The purpose of this study was to investigate the association of gastro-esophageal reflux disease (GERD) with dental erosion in a sample of Iranian population regarding the standing difference in the Iranian oral hygiene and diet. Material s and Method: 140 patients with the average age of 30 to 50 years old comprised the study group. The participants were already eligible for the endoscopic examination, diagnosed by their gastroenterologist. All patients completed a detailed questionnaire regarding the medical and dental situations. After completing the questionnaire and before endoscopy, dental examination was performed by two blinded dentists.The endoscopy was then performed by a gastroenterologist and the patients were divided into three groups of healthy, suspected to GERD, and positive GERD. Data were collected and analyzed by Chi- Square test. The cross tabulation test was performed to compare the qualitative variants and discover the correlations. The statistical significance was adopted as: p < 0.05. RESULTS The prevalence of dental erosion in GERD patients (22.6%) was found to be higher than the suspected (5.3%) and the healthy (7%) individuals. CONCLUSION This study declared the GERD patients are at higher risk of developing dental erosion compared to the healthy individuals in a sample of Iranian population.
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Affiliation(s)
- G Alavi
- Post Graduate Student, Department of Oral and Maxillofacial Pathology, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, IRAN
| | - Aa Alavi
- Biomaterial Research Center, Dept. of Operative Dentistry, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
| | - M Saberfiroozi
- Gastroenterohepatology Research Center, Nemazee Hospital, School of Medicine, Shiraz University of Medical Sciences, Shiraz, IRAN
| | - Ah Sarbazi
- Dept. of Prosthodontics, School of Dentistry, Aja University of Medical Sciences, Tehran, IRAN
| | - M Motamedi
- Dept. of Operative Dentistry, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, IRAN
| | - Sh Hamedani
- Dental Research Development Center (DRDC), School of Dentistry, Shiraz University of Medical Sciences, Shiraz, IRAN
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Boretsky A, van Kuijk E, Motamedi M. Multimodal imaging of the retina in aging and age-related macular degeneration. J Vis 2013. [DOI: 10.1167/13.15.65] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Briley D, Boretsky A, Motamedi N, Motamedi M. High resolution volumetric imaging in the murine retina. J Vis 2013. [DOI: 10.1167/13.15.69] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Arab S, Mojarrad M, Motamedi M, Mirzaei R, Modarressi MH, Hadjati J. Tumour regression induced by co-administration of MIP-3α and CpG in an experimental model of colon carcinoma. Scand J Immunol 2013; 78:28-34. [PMID: 23672351 DOI: 10.1111/sji.12058] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2013] [Accepted: 03/25/2013] [Indexed: 01/19/2023]
Abstract
CCL20/macrophage inflammatory protein-3α (MIP-3α) represents one of the potent chemoattractive proteins for dendritic cells (DCs). Herein, we investigated whether in vivo genetic modification of tumour cells aimed at intratumoural production of MIP-3α might lead to accumulation of DCs in tumour tissue. Mice injected with CT26, received recombinant adenovirus (Ad) vectors (AdMIP-3α) expressing MIP-3α protein. This was complemented by injections of CpG. Interestingly, MIP-3α gene therapy combined with CpG injections resulted in specific cytotoxicity. This was associated with significant suppression of tumour growth rate. These findings demonstrate the potential of strategies that utilize in vivo overexpression of chemokines.
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Affiliation(s)
- S Arab
- Department of Immunology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
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Motamedi M, Montazerian M. 223 FACTORS INFLUENCING THE CHOICE OF CESAREAN SECTION IN PREGNANT WOMEN WHO REFERRED TO IMAM ALI HOSPITAL OF ANDIMESHK COUNTY 2010. Maturitas 2012. [DOI: 10.1016/s0378-5122(12)70334-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Motamedi M, Tehrani-Bagha A, Mahdavian M. A comparative study on the electrochemical behavior of mild steel in sulfamic acid solution in the presence of monomeric and gemini surfactants. Electrochim Acta 2011. [DOI: 10.1016/j.electacta.2011.09.079] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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Vincent K, Stanberry L, Moench T, Breitkopf CR, Loza M, Wei J, Paull J, Grady J, Motamedi M, Rosenthal S. P3-S7.17 Noninvasive high resolution imaging with optical coherence tomography for vaginal product safety assessment in women. Br J Vener Dis 2011. [DOI: 10.1136/sextrans-2011-050108.500] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Fattahi F, Motamedi M. Effect of gap distance on tensile strength of preceramic base metal solder joints. J Dent Res Dent Clin Dent Prospects 2011; 5:79-82. [PMID: 22991610 PMCID: PMC3442451 DOI: 10.5681/joddd.2011.018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2011] [Accepted: 05/13/2011] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND AND AIMS In order to fabricate prostheses with high accuracy and durability, soldering techniques have been introduced to clinical dentistry. However, these prostheses always fail at their solder joints. The purpose of this study was to evaluate the effect of gap distance on the tensile strength of base metal solder joints. MATERIALS AND METHODS Based on ADA/ISO 9693 specifications for tensile test, 40 specimens were fabricated from a Ni-Cr alloy and cut at the midpoint of 3-mm diameter bar and placed at desired positions by a specially designed device. The specimens were divided into four groups of 10 samples according to the desired solder gap distance: Group1: 0.1mm; Group2: 0.25mm; Group3: 0.5mm; and Group4: 0.75mm. After soldering, specimens were tested for tensile strength by a universal testing machine at a cross-head speed of 0.5mm/min with a preload of 10N. RESULTS The mean tensile strength values of the groups were 162, 307.8, 206.1 and 336.7 MPa, respectively. The group with 0.75-mm gap had the highest and the group with 0.1-mm gap had the lowest tensile strength. Bonferroni test showed that Group1 and Group4 had statistically different values (P=0.023), but the differences between other groups were not sig-nificant at a significance level of 0.05. CONCLUSION There was no direct relationship between increasing soldering gap distance and tensile strength of the solder joints.
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Affiliation(s)
- Farnaz Fattahi
- Assistant Professor, Department of Prosthodontics, Faculty of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Milad Motamedi
- Postgraduate Student, Department of Prosthodontics, Faculty of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
,Corresponding Author;
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Shafiei F, Motamedi M, Alavi AA, Namvar B. The Effect of Oxalate Desensitizers on the Microleakage of Resin Composite Restorations Bonded by Etch and Rinse Adhesive Systems. Oper Dent 2010; 35:682-8. [DOI: 10.2341/10-114-l] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Clinical Relevance
The effect of oxalate desensitizer application after acid etching on the dentinal marginal sealing ability of resin composite restorations may be adhesive-specific.
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Nikoobakht M, Motamedi M, Ebrahimi Nasrabady S, Khashayar P, Afshin A, Orandi A, Talei Khatibi F. MP-17.03: Evaluation of Voiding Dysfunction in Epileptic Patients. Urology 2009. [DOI: 10.1016/j.urology.2009.07.804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Mortazavi SMJ, Heidari P, Esfandiari H, Motamedi M. Trapezoid supracondylar femoral extension osteotomy for knee flexion contractures in patients with haemophilia. Haemophilia 2007; 14:85-90. [PMID: 18005146 DOI: 10.1111/j.1365-2516.2007.01585.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Flexion deformity of the haemophilic knee is a considerable cause of disability and may need to be managed surgically in severe cases. We have used a trapezoid supracondylar femoral extension osteotomy to correct severe knee flexion deformity. Nine severe haemophilic patients with contractures >30 degrees that were unresponsive to conservative measures underwent 11 trapezoid osteotomies. The angle of deformity was measured using anteroposterior and lateral knee X-ray films at maximum extension. Factor levels of 80-100% were achieved before the operation. A trapezoid osteotomy of the distal femur bone was performed using a lateral approach. The frontal plane angular deformity (if any) was corrected at the same time. The osteotomy site was fixed using an Arbeitsgemeinschaft für Osteo synthesefragen (AO) condylar blade plate. Following surgery, the knee was supported by a plaster splint at 20 degrees of flexion. Physiotherapy was started on third postoperative day and continued three times a week. There was no serious complication. The deformities were corrected in all of the patients and the mean range of motion increased form 68.6 degrees to 98.1 degrees . Bleeding episodes decreased in all four knees which had a bleeding score of 3 before surgery. Using the Orthopaedic Advisory Committee of the World Federation of Haemophilia scores, nine good and two fair results were obtained. All patients regained the ability to walk for both short and long distance without any aid, climb the stairs, bath, and use public transportation. Trapezoid supracondylar femoral extension osteotomy should be considered in the surgical management of severe haemophilic flexion deformity of the knee joint.
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Affiliation(s)
- S M J Mortazavi
- Iranian Tissue Bank (Research and Preparation Centre), Tehran, Iran.
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Petrov Y, Prough D, Deyo D, Petrova I, Motamedi M, Esenaliev R. In vivo noninvasive monitoring of cerebral blood with optoacoustic technique. Conf Proc IEEE Eng Med Biol Soc 2007; 2004:2052-4. [PMID: 17272123 DOI: 10.1109/iembs.2004.1403603] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
We present the results of blood oxygenation (oxyhemoglobin saturation) measurements using an optoacoustic system in vivo in the superior sagittal sinus of sheep. The system included a nanosecond Nd:YAG laser as a source of radiation and a specially designed optoacoustic probe for signal detection. The optoacoustic signal induced in the superior sagittal sinus by the nanosecond laser pulses correlated well with actual oxyhemoglobin saturation measured with CO-oximeter. We propose to use a two- or multi- wavelength optoacoustic system for noninvasive continuous monitoring of cerebral venous blood oxygenation. The spectra of effective attenuation coefficient were measured in the range 680-1300 nm for oxy- and deoxygenated whole blood and can be employed for calibration of the system.
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Affiliation(s)
- Y Petrov
- Center for Biomedical Engineering, University of Texas, Galveston, TX 77555, USA
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Nikoobakht M, Motamedi M, Orandi A, Ebrahimi Nasrabady S, Orandi A, Afshin A, Tale Khatibi F. POS-01.79: Sexual dysfunction in epileptic patients. Urology 2007. [DOI: 10.1016/j.urology.2007.06.871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Motamedi M, Mortazavi SMJ, Miresmaseeli SH. Migration of a broken Kirschner wire from an acromioclavicular joint into the neck: a case report. Eur J Orthop Surg Traumatol 2007. [DOI: 10.1007/s00590-007-0257-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Sahraian MA, Motamedi M, Azimi AR, Hasan Paknejad SM. Bilateral pulvinar thalamic calcification in a patient with chronic cryptococcal meningitis. Eur J Neurol 2007; 14:e1-2. [PMID: 17388969 DOI: 10.1111/j.1468-1331.2006.01634.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Abstract
There is no statistical data on the incidence of heterotopic ossification among patients with haemophilia, and a few reports documenting this entity in haemophilia are available. Although post-traumatic heterotopic ossification about the elbow is a well-recognized complication, we are not aware of any previously reported case in haemophiliacs. An 8-year-old boy with severe haemophilia A presented with fixed elbow in 80 degrees of flexion. Radiographs disclosed a mature anterior heterotopic ossification in the form of complete ulnohumeral bony bridge. Surgical excision of the heterotopic bone was performed. A full elbow range of motion was obtained after long-term physiotherapy. We conclude that this surgery is safe and successful in haemophilic patients, if performed at the right time under optimal situation.
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Affiliation(s)
- S M J Mortazavi
- Department of Orthopedic Sugery, Imam Hospital Haemophilia Centre, Tehran University of Medical Sciences, Tehran, Iran.
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Motamedi M, Bathaie S, Hemmateenejad B, Adjloo D. Semi-empirical quantum chemical study of the interactions between lysine, arginine and histidine with a homologue set of n-alkyl sulfates in the gas phase and aqueous solution. ACTA ACUST UNITED AC 2004. [DOI: 10.1016/j.theochem.2004.02.016] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Motamedi M. Soft Tissue and Esthetic Considerations in Implant Therapy. Br Dent J 2004. [DOI: 10.1038/sj.bdj.4811247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Hosseini K, Jongsma FHM, Hendrikse F, Motamedi M. Non-invasive monitoring of commonly used intraocular drugs against endophthalmitis by Raman spectroscopy. Lasers Surg Med 2003; 32:265-70. [PMID: 12696093 DOI: 10.1002/lsm.10168] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
PURPOSE To develop a non-contact and non-invasive method for quantification of the local concentration of certain antibiotic and antifungal drugs in the eye. STUDY DESIGN/MATERIALS AND METHODS An integrated CCD-based Raman spectroscopic system designed specifically for ophthalmic applications was used to non-invasively detect the presence of ceftazidime and amphotericin B in ocular media. Specific Raman signatures of the above named drugs were determined for various concentrations that were injected through a needle in the aqueous humor of rabbit eyes in vivo. Raman spectra were subsequently acquired by focusing an argon laser beam within the anterior chamber of the eye. RESULTS Compared to ocular tissue, unique spectral features of ceftazidime appeared near 1,028, 1,506, 1,586, and 1,641 cm(-1). Amphotericin B exhibited its characteristic peaks at 1,156.5 and 1,556 cm(-1). The amplitude of the spectral peak corresponding to these drugs (acquired by 1 second exposure time and 25 mW of laser power) were determined to be linearly dependent on their local concentration in the anterior chamber of the eye. CONCLUSIONS Raman spectroscopy may offer an effective tool to non-invasively assess the local concentration of the delivered drugs within the ocular media. This technique potentially could be used to investigate the pharmacokinetics of intraocular drugs in vivo either from a releasing implant or a direct injection.
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Affiliation(s)
- K Hosseini
- The University of Texas Medical Branch, The Center for Biomedical Engineering, Galveston, Texas 77555, USA
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Hosseini K, March W, Jongsma FHM, Hendrikse F, Motamedi M. Noninvasive detection of ganciclovir in ocular tissue by Raman spectroscopy: implication for monitoring of drug release. J Ocul Pharmacol Ther 2002; 18:277-85. [PMID: 12099548 DOI: 10.1089/108076802760116197] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
UNLABELLED Treatment of various pathological conditions in ophthalmology, such as cytomegalovirus (CMV) retinopathy and endophthalmitis, requires a local drug intervention rather than a systemic approach. Accurate knowledge of intraocular drug concentration can permit the ophthalmologist to maintain drug levels within the therapeutic levels necessary for an optimal prognosis, while preventing or minimizing toxicity associated with drug overdose. PURPOSE To develop a noninvasive/noncontact method for quantification of the local concentration of ganciclovir in the ocular media. METHODS An integrated CCD-based Raman spectroscopic system designed specifically for ophthalmic applications was used to noninvasively detect the presence of ganciclovir in the ocular media. Various known concentrations of ganciclovir were injected into the aqueous humor of rabbit eyes in a pilot study, in vivo. Raman spectra were then acquired by focusing an argon laser beam within the anterior chamber of the eye. The specific Raman signature of ganciclovir was assessed at several concentrations. RESULTS Spectral features unique to ganciclovir were identified and distinguished from those of ocular tissue. The amplitudes of the spectral peaks corresponding to ganciclovir exhibited a linear dependence on the local concentration of the drug in the anterior chamber of the eye. CONCLUSION Raman spectroscopy may offer an effective tool for the noninvasive assessment of the local concentration of ganciclovir in the ocular media. This technique offers the potential to determine both the amount and the rate of the drug release from implants designed to deliver antiviral drugs locally within the eye. The availability of such data could enable the ophthalmologist to improve treatment efficacy by avoiding premature or late surgical replacement of the implants.
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Affiliation(s)
- K Hosseini
- The University of Texas Medical Branch, Department of Ophthalmology and Visual Sciences, Galveston 77555-0456, USA
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Motamedi M, Sütterlin M, Müller T, Gassel AM, Dietl J. Endometrioides Adenokarzinom in einer Endometriose des Ureters. Geburtshilfe Frauenheilkd 2002. [DOI: 10.1055/s-2002-32283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022] Open
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Erckens RJ, Jongsma FH, Wicksted JP, Hendrikse F, March WF, Motamedi M. Raman spectroscopy in ophthalmology: from experimental tool to applications in vivo. Lasers Med Sci 2002; 16:236-52. [PMID: 11702629 DOI: 10.1007/pl00011360] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Raman spectroscopy is a qualitative and quantitative optical technique for determining the molecular composition of matter. Improvements in spectroscopic instruments, especially the modality to detect low light level signals extended the Raman technique to biomedical applications, even in delicate structures like the eye. The purpose of this paper was to make an inventory of performed applications of Raman spectroscopy in biomedical science and especially in ophthalmology. A literature search was done using Medline, Current Contents, a patent server on the Internet, and references found in articles and patents. This search revealed a variety of Raman techniques and applications in biomedical research, and an increasing flow of articles starting in the late 1970s on Raman spectroscopy in ophthalmology. This increase in literature about Raman spectroscopy in ophthalmology feeds the expectation that this valuable technique will be introduced in the future into clinical practice.
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Affiliation(s)
- R J Erckens
- Dept. of Ophthalmology, Academic Hospital Maastricht, Maastricht, PO Box 5800, DOT 10, 6202AZ, The Netherlands
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Abstract
BACKGROUND AND OBJECTIVE To investigate the sterilization effectiveness of endoluminal tubal photocoagulation on tubal lumen obliteration. STUDY DESIGN/MATERIALS AND METHODS Twenty-four female rabbits were subjected to laparotomy and hysterotomy. Endoluminal tubal photocoagulation was induced over a length of 3 cm in the proximal, extramural fallopian tube by using a cylindrical diffusing tip that emitted diode laser radiation at 805 and 980 nm wavelengths. Tubal patency was evaluated by observing patterns of injected methylene blue and/or breeding success rates. RESULTS Postoperative recovery was uneventful in all animals. Evidence of occlusion of the tubal lumen included a negative methylene blue test in all 12 tubes treated (tubal occlusion rate 100%) and failure to conceive in 17 of 18 uteri (contraception rate 94.5%). Although identical power settings were used, distinctly lower tubal surface temperatures (about 10 degrees C) were obtained with the 805 nm diode laser as compared to the 980 nm diode laser. CONCLUSIONS The described endoluminal tubal photocoagulation method using a diode laser emitting longer wavelengths (e.g., 980 nm) is suitable for safe and effective sterilization in rabbits and has potential as a new transcervical tubal sterilization method for humans.
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Affiliation(s)
- S Spörri
- Department of Obstetrics and Gynecology, University of Bern, Schanzeneckstrasse 1, 3012 Bern, Switzerland.
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Spörri S, Chopra V, Egger N, Hawkins HK, Motamedi M, Dreher E, Schneider H. Effects of 5-aminolaevulinic acid on human ovarian cancer cells and human vascular endothelial cells in vitro. J Photochem Photobiol B 2001; 64:8-20. [PMID: 11705725 DOI: 10.1016/s1011-1344(01)00179-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Results are reported on the cellular effects and the sensitivity of cultured tumor epithelial cells (TEC) derived from human ovarian cystadenocarcinoma and human umbilical vein-derived endothelial cells (HUVEC) to exogenous 5-aminolaevulinic acid (ALA) and ALA-induced photodynamic therapy (PDT). Cellular alterations and PDT efficiency were evaluated using colorimetric thiazolyl blue (MTT) assay, trypan blue exclusion assay, electron microscopy, and gel electrophoresis. ALA-induced protoporphyrin IX (PpIX) accumulation in TEC was associated with a concentration and time-dependent significant decrease in mitochondrial activity, increase in cell membrane permeability, and dark toxicity. Maximum PpIX loaded TEC demonstrated a high sensitivity to PDT. Neither cellular alterations nor PDT effects were observed in HUVEC under identical experimental conditions. These results indicate a potential clinical value for the use of ALA-mediated PDT to treat minimal residual disease in mucinous ovarian carcinoma. In addition, the ALA-induced PpIX cytotoxicity may be exported to a new chemotherapeutic regimen via a conventionally viewed photochemotherapeutic agent.
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Affiliation(s)
- S Spörri
- Department of Obstetrics and Gynecology, University of Bern, 3012, Bern, Switzerland.
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Esenaliev RO, Larin KV, Larina IV, Motamedi M. Noninvasive monitoring of glucose concentration with optical coherence tomography. Opt Lett 2001; 26:992-4. [PMID: 18040511 DOI: 10.1364/ol.26.000992] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
We have proposed a tested in tissue phantoms and in vivo a novel sensor based on optical coherence tomography (OCT) for noninvasive and continuous monitoring of blood glucose concentration. OCT images were obtained from pig and rabbit skin before and after glucose administration. Slopes of OCT signals decreased substantially (~40% in tissues in vivo) and linearly with the increase of blood glucose concentration from 4 to 30 mM, typical for normal and diabetic subjects. Phantom studies demonstrated 1% accuracy of scattering-coefficient measurement. Our theoretical and experimental studies suggest that glucose concentration can potentially be measured noninvasively with high sensitivity and accuracy with OCT systems.
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Erckens RJ, March WF, Jongsma FH, Wicksted JP, Hendrikse F, Smit EE, Motamedi M. Noninvasive Raman spectroscopic identification of intraocular lens material in the living human eye. J Cataract Refract Surg 2001; 27:1065-70. [PMID: 11489577 DOI: 10.1016/s0886-3350(00)00828-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
PURPOSE To develop a safe noninvasive technique for identifying the material of intraocular lenses (IOLs) implanted in patients. SETTING Center for Biomedical Engineering and the Department of Ophthalmology and Visual Sciences, University of Texas Medical Branch, Galveston, Texas, USA. METHODS Raman spectroscopy was used to noninvasively identify the type of IOL implanted after previous cataract surgery in 9 eyes of 6 patients who were legally blind as a result of eye disease. Three IOLs were characterized: poly(methyl methacrylate) (PMMA) (n = 5), acrylic (n = 3), and silicone (n = 1). Confocal Raman spectroscopy was used with a laser power of 95 microW and exposure time of 1 second. RESULTS Distinct spectral peaks associated with each type of IOL were obtained. These included spectra peaks at 2840 cm(-1), 2946 cm(-1), and 3000 cm(-1) for PMMA; 2917 cm(-1), 2939 cm(-1), and 3055 cm(-1) for acrylic; and 2900 cm(-1), 2961 cm(-1), and 3048 cm(-1) for silicone. The procedure was well accepted by patients, and there were no complications. CONCLUSIONS The specific Raman spectra of the IOLs allowed for noninvasive determination of IOL material with the use of a safe light dose and an exposure time of 1 second.
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Affiliation(s)
- R J Erckens
- Laser & Spectroscopy Program of the Center for Biomedical Engineering, University of Texas Medical Branch, 700 University Boulevard, Galveston, TX 77555, USA
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Pedersen K, Motamedi M, Karnland O, Sandén T. Mixing and sulphate-reducing activity of bacteria in swelling, compacted bentonite clay under high-level radioactive waste repository conditions. J Appl Microbiol 2000; 89:1038-47. [PMID: 11123477 DOI: 10.1046/j.1365-2672.2000.01212.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
AIM The fate of micro-organisms in the bentonite clay surrounding high-level radioactive waste (HLW)-containing copper canisters in a future Swedish underground (500 m) repository were investigated. METHODS AND RESULTS Laboratory experiments were designed in which the mixing of various bacterial species with swelling bentonite was studied. A clear trend of fewer cultivable bacteria at depth was seen in the clay. This trend was consistent as the incubation time was increased from 8 h to 28 weeks. Sulphate-reducing bacteria were found to be active, reducing sulphate at the lowest density studied, 1.5 g cm-3, but sulphate reduction activity ceased at higher densities. CONCLUSIONS The number of viable micro-organisms in an HLW repository bentonite clay buffer will decrease rapidly during swelling and very few viable cells will be present at full compaction. SIGNIFICANCE AND IMPACT OF THE STUDY Sulphate-reducing bacteria will most probably not be able to induce corrosion of HLW-containing copper canisters.
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Affiliation(s)
- K Pedersen
- Department of Cell and Molecular Biology, Microbiology Section, Göteborg University, Göteborg and Clay Technology AB, Ideon Research Centre, Lund, Sweden.
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Suh SW, Danscher G, Jensen MS, Thompson R, Motamedi M, Frederickson CJ. Release of synaptic zinc is substantially depressed by conventional brain slice preparations. Brain Res 2000; 879:7-12. [PMID: 11010999 DOI: 10.1016/s0006-8993(00)02675-5] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Research on synaptically-released zinc is frequently done in vitro with acute brain slice preparations. We show here the in vitro hippocampal slice preparation has two major pitfalls for zinc research. First, up to 50% of the synaptic zinc is lost during slice cutting and/or the first 10 min of slice incubation, with the losses being most pronounced on the edges of the slice. Second, the release of the remaining zinc from a slice is substantially depressed (up to 50%) at the low temperatures (32 degrees C) typically used for brain slice studies. In concert, these effects reduce zinc release about 75% in vitro, compared to in vivo. Implications for research on synaptically-released zinc are discussed.
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Affiliation(s)
- S W Suh
- Center for Biomedical Engineering, and Department of Anatomy and Neuroscience, The University of Texas Medical Branch, 625 Jennie-Sealy Hospital, Galveston, TX 77555-0456, USA
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Abstract
Epicardial heating may be used for ventricular tachycardia (VT) ablation and transmyocardial revascularization. However, the potential risks of thermal epicardial injury, including arrhythmia, have not been fully explored. This study relates the pathologic and arrhythmic sequellae of epicardial heating when applied with a diode laser at varying doses. Acute pathology and dosimetry were determined in a group of normal dogs using 2-3 W over 30-90 seconds. Another group received a similar dose range before undergoing 24-hour monitoring, and electrophysiological testing was done at 4 weeks. In this group, four dogs each received 12 lesions (90-180 J) according to a randomized block design. Another dog received nine lower dose lesions (30-120 J). Acute lesions measured 2.5-8.0-mm wide by 4-8.5-mm deep. Charring and vaporization were common when 3 W were applied over 45 seconds. Within 24 hours, VT with features of abnormal automaticity occurred in all dogs receiving this dose. The dog in whom lower doses induced coagulation only had no VT. Four weeks later, electrophysiological study induced no VT. At this time fibrosis and granulation tissue were organizing the contraction band necrosis seen acutely, and some lesion borders were becoming calcified. No major vessels had been damaged. Abnormal automaticity and VT may occur if thermal damage of the epicardium exceeds coagulation. This could be related to tissue injury caused by sudden water vaporization, and may have clinical relevance given the growing indications for myocardial heating.
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Affiliation(s)
- D L Ware
- Department of Internal Medicine, University of Texas Medical Branch, Galveston, Texas, TX 77555-0553, USA.
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Abstract
This study was conducted to investigate the effectiveness and safety of endoluminal tubal coagulation in obliterating the tubal lumen in rabbits. Forty female rabbits were subjected to laparotomy and hysterotomy. Endoluminal tubal coagulation was induced over a length of 3 cm in the proximal, extramural fallopian tube by using a heated stainless steel cannula or a cylindrical diffusing tip emitting argon laser radiation for one to 5 minutes. Tubal patency was evaluated by observing patterns of injected methylene blue and/or breeding success rates. Postoperative recovery was uneventful in all animals. A negative methylene blue test indicated occlusion in 51 of 52 tubes (tubal occlusion rate 98.1%), and a contraception rate of 100% in all 17 uteri in which the tube had been treated. The described endoluminal tubal coagulation method proved suitable for safe and effective sterilization in rabbits and has potential as a new transcervical tubal sterilization method for humans.
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Affiliation(s)
- S Spörri
- Department of Obstetrics and Gynecology, University of Bern, Bern, Switzerland.
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44
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Abstract
BACKGROUND AND OBJECTIVE We investigated the feasibility of a microjet to dispense protein solder for laser assisted soldering. STUDY DESIGN Successive micro solder droplets were deposited on rat dermis and bovine intima specimens. Fixed laser exposure was synchronized with the jetting of each droplet. After photocoagulation, each specimen was cut into two halves at the center of solder coagulum. One half was fixed immediately, while the other half was soaked in phosphate-buffered saline for a designated hydration period before fixation (1 hour, 1, 2, and 7 days). After each hydration period, all tissue specimens were prepared for scanning electron microscopy (SEM). RESULTS Stable solder coagulum was created by successive photocoagulation of microdroplets even after the soldered tissue exposed to 1 week of hydration. CONCLUSIONS This preliminary study suggested that tissue soldering with successive microdroplets is feasible even with fixed laser parameters without active feedback control.
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Affiliation(s)
- E K Chan
- Indigo Medical, Inc., Cincinnati, Ohio 45242, USA.
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45
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Abstract
BACKGROUND AND OBJECTIVE Two separate cases involving laser ablation of hair follicles in the neourethra are described. STUDY DESIGN/MATERIALS AND METHODS Urethral hair developed secondarily to free-flap urethroplasty for congenital urethral defects. In both cases, cystoscopic depilation with electrocautery fulguration was attempted on multiple occasions. RESULTS No improvement was seen; therefore, laser ablation was employed. Both patients remain free of regrowth at greater than one year of follow-up.
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Affiliation(s)
- D E Neal
- Department of Surgery, The University of Texas Medical Branch, Galveston 77555, USA
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46
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Vaidyanathan VV, Rastegar S, Fossum TW, Flores P, van Der Breggen EW, Egger NG, Jacques SL, Motamedi M. A study of aminolevulinic acid-induced protoporphyrin IX fluorescence kinetics in the canine oral cavity. Lasers Surg Med 2000; 26:405-14. [PMID: 10805946 DOI: 10.1002/(sici)1096-9101(2000)26:4<405::aid-lsm9>3.0.co;2-e] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND AND OBJECTIVE 5-Aminolevulinic acid-induced protoporphyrin IX is a promising photosensitizer that could enhance the spectroscopic contrast between normal and diseased oral tissues. Knowledge of the pharmacokinetics and effects on tissue type are important for diagnostic and therapeutic procedures. STUDY DESIGN/MATERIALS AND METHODS Dogs randomly were administered five doses of 5-aminolevulinic acid: 5, 25, 50, 75, and 100 mg/kg. The fluorescence was recorded from buccal mucosa, gums, tongue, and facial skin using a fiberoptic probe connected to an optical multichannel analyzer. Blood samples were collected for hematologic and serum biochemical analysis. Pharmacokinetic parameters of interest were estimated using a compartmental model. RESULTS Protoporphyrin fluorescence at all sites reached a peak in 2-6 hours, and returned to baseline in 24-31 hours, depending on the dose. Plasma protoporphyrin peaked earlier than oral tissues. CONCLUSION The rate of synthesis of protoporphyrin, and its conversion to heme products are dose dependent. Different tissues have different pharmacokinetic response.
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Affiliation(s)
- V V Vaidyanathan
- Bioengineering Program, Texas A&M University, College Station, Texas 77843, USA
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47
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Kvist T, Riet C, Motamedi M, Hashemi H, Hoffman J, Alfter G, Kerawala C. Br Dent J 2000; 188:382-382. [DOI: 10.1038/sj.bdj.4800487a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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48
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Lin WC, Toms SA, Motamedi M, Jansen ED, Mahadevan-Jansen A. Brain tumor demarcation using optical spectroscopy; an in vitro study. J Biomed Opt 2000; 5:214-20. [PMID: 10938786 DOI: 10.1117/1.429989] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/1999] [Revised: 02/04/2000] [Accepted: 02/28/2000] [Indexed: 05/20/2023]
Abstract
Optical spectroscopy for brain tumor demarcation was investigated in this study. Fluorescence and diffuse reflectance spectra were measured from normal and tumorous human brain tissues in vitro. A fluorescence peak was consistently observed around 460 nm (+/- 10 nm) emission from both normal and tumorous brain tissues using 337 nm excitation. Intensity of this fluorescence peak (F460) from normal brain tissues was greater than that from primary brain tumorous tissues. In addition, diffuse reflectance (Rd) between 650 and 800 nm from white matter was significantly stronger than that from primary and secondary brain tumors. A good separation between gray matter and brain tumors was found using the ratio of F460 and Rd at 460 nm (Rd460). Two empirical discrimination algorithms based on F460, Rd625, and F460/Rd460 were developed. These algorithms yielded an average sensitivity and specificity of 96% and 93%, respectively.
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Affiliation(s)
- W C Lin
- Department of Biomedical Engineering, Vanderbilt University, Nashville, Tennessee 37235, USA
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49
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Suh SW, Chen JW, Motamedi M, Bell B, Listiak K, Pons NF, Danscher G, Frederickson CJ. Evidence that synaptically-released zinc contributes to neuronal injury after traumatic brain injury. Brain Res 2000; 852:268-73. [PMID: 10678752 DOI: 10.1016/s0006-8993(99)02095-8] [Citation(s) in RCA: 240] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Prior evidence indicates that synaptically-released zinc enters postsynaptic neurons in toxic excess during ischemia and seizures. In addition, prevention of this zinc translocation has been shown to be neuroprotective in both ischemia and seizures. Here we show evidence that the same translocation of zinc from presynaptic boutons into postsynaptic neurons occurs after mechanical injury to the brain. Specifically, using a rat model of traumatic brain injury, we show that trauma is associated with (i) loss of zinc from presynaptic boutons (ii) appearance of zinc in injured neurons, and (iii) neuroprotection by intraventricular administration of a zinc chelator just prior to brain impact. The possible use of zinc chelators for neuroprotection after head trauma is considered.
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Affiliation(s)
- S W Suh
- Center for Biomedical Engineering, UTMB, Galveston, TX 77555, USA
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50
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Vaidyanathan VV, Rastegar S, Fossum TW, Flores P, van Der Breggen EW, Egger NG, Jacques SL, Motamedi M. A study of aminolevulinic acid-induced protoporphyrin IX fluorescence kinetics in the canine oral cavity. Lasers Surg Med 2000. [PMID: 10805946 DOI: 10.1002/(sici)1096-9101(2000)26:4%3c405::aid-lsm9%3e3.0.co;2-e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/22/2023]
Abstract
BACKGROUND AND OBJECTIVE 5-Aminolevulinic acid-induced protoporphyrin IX is a promising photosensitizer that could enhance the spectroscopic contrast between normal and diseased oral tissues. Knowledge of the pharmacokinetics and effects on tissue type are important for diagnostic and therapeutic procedures. STUDY DESIGN/MATERIALS AND METHODS Dogs randomly were administered five doses of 5-aminolevulinic acid: 5, 25, 50, 75, and 100 mg/kg. The fluorescence was recorded from buccal mucosa, gums, tongue, and facial skin using a fiberoptic probe connected to an optical multichannel analyzer. Blood samples were collected for hematologic and serum biochemical analysis. Pharmacokinetic parameters of interest were estimated using a compartmental model. RESULTS Protoporphyrin fluorescence at all sites reached a peak in 2-6 hours, and returned to baseline in 24-31 hours, depending on the dose. Plasma protoporphyrin peaked earlier than oral tissues. CONCLUSION The rate of synthesis of protoporphyrin, and its conversion to heme products are dose dependent. Different tissues have different pharmacokinetic response.
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Affiliation(s)
- V V Vaidyanathan
- Bioengineering Program, Texas A&M University, College Station, Texas 77843, USA
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