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Farhadi M, Gorji A, Mirsalehi M, Poletaev AB, Asadpour A, Mahboudi F, Jafarian M, Farrahizadeh M, Akbarnejad Z, Mahmoudian S. Electrophysiological and molecular changes following neuroprotective placental protein administration on tinnitus-induced rats. Laryngoscope Investig Otolaryngol 2023; 8:1410-1420. [PMID: 37899856 PMCID: PMC10601594 DOI: 10.1002/lio2.1156] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Revised: 08/01/2023] [Accepted: 08/16/2023] [Indexed: 10/31/2023] Open
Abstract
Objective Despite 6%-20% of the adult population suffering from tinnitus, there is no standard treatment for it. Placenta extract has been used for various therapeutic purposes, including hearing loss. Here, we evaluate the effect of a novel neuroprotective protein composition (NPPC) extract on electrophysiological and molecular changes in the medial geniculate body (MGB) of tinnitus-induced rats. Methods To evaluate the protein analysis by western blot, the rats were divided into three groups: (1) saline group (intraperitoneal injection of 200 mg/kg saline twice a day for 28 consecutive days, (2) chronic Na-Sal group received sodium salicylate as in the first group, and (3) chronic treatment group (received salicylate 200 mg/kg twice daily for 2 weeks, followed by 0.4 mg NPPC daily from day 14 to day 28). Single-unit recordings were performed on a separate group that was treated as in group 4. Gap-prepulse inhibition of the acoustic startle (GPIAS) and pre-pulse inhibition (PPI) was performed to confirm tinnitus in all groups at the baseline, 14th and 28th days. Results Western blot analysis showed that the expression of γ-Aminobutyric acid Aα1 subunit (GABA Aα1), N-methyl-d-aspartate receptor subtype 2B (NR2B or NMDAR2B), α-amino-3-hydroxy-5-methyl-4-isoxazole propionic acid receptors subunit GluR1 (GluR1), and α-amino-3-hydroxy-5-methyl-4-isoxazole propionic acid receptors subunit GluR2 (GluR2) decreased after Na-Sal injection, while NPPC upregulated their expression. MGB units in rats with tinnitus showed decreased spontaneous firing rate, burst per minute, and a spike in a burst. After NPPC administration, neural activity patterns showed a significant positive effect of NPPC on tinnitus. Conclusion NPPC can play an effective role in the treatment of tinnitus in salicylate-induced rats, and MGB is one of the brain areas involved in these processes. Level of Evidence NA.
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Affiliation(s)
- Mohammad Farhadi
- ENT and Head and Neck Research CenterThe Five Senses Health Institute, School of Medicine, Iran University of Medical SciencesTehranIran
| | - Ali Gorji
- Epilepsy Research Center, Department of NeurosurgeryWestfälische Wilhelms‐Universitat MünsterMünsterGermany
- Neuroscience Research CenterMashhad University of Medical SciencesMashhadIran
- Shefa Neuroscience Research CenterKhatam Alanbia HospitalTehranIran
| | - Marjan Mirsalehi
- ENT and Head and Neck Research CenterThe Five Senses Health Institute, School of Medicine, Iran University of Medical SciencesTehranIran
| | - Alexander Borisovich Poletaev
- Clinical and Research Center of Children Psycho‐NeurologyMoscowRussian Federation
- Medical Research Centre “Immunculus”MoscowRussian Federation
| | - Abdoreza Asadpour
- Intelligent Systems Research CenterUlster University, Magee CampusDerry~LondonderryNorthern IrelandUK
| | | | - Maryam Jafarian
- Brain and Spinal Cord Injury Research CentreNeuroscience Institute, Tehran University of Medical SciencesTehranIran
| | - Maryam Farrahizadeh
- Department of Neuroscience, School of Advanced Technologies in MedicineIran University of Medical SciencesTehranIran
| | - Zeinab Akbarnejad
- ENT and Head and Neck Research CenterThe Five Senses Health Institute, School of Medicine, Iran University of Medical SciencesTehranIran
| | - Saeid Mahmoudian
- ENT and Head and Neck Research CenterThe Five Senses Health Institute, School of Medicine, Iran University of Medical SciencesTehranIran
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Farhadi M, Gorji A, Mirsalehi M, Müller M, Poletaev AB, Mahboudi F, Asadpour A, Ebrahimi M, Beiranvand M, Khaftari MD, Akbarnejad Z, Mahmoudian S. The human neuroprotective placental protein composition suppressing tinnitus and restoring auditory brainstem response in a rodent model of sodium salicylate-induced ototoxicity. Heliyon 2023; 9:e19052. [PMID: 37636471 PMCID: PMC10457515 DOI: 10.1016/j.heliyon.2023.e19052] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 07/22/2023] [Accepted: 08/08/2023] [Indexed: 08/29/2023] Open
Abstract
The effect of neuroprotective placental protein composition (NPPC) on the suppression of tinnitus and the restoration of the auditory brainstem response (ABR) characteristics was explored in tinnitus-induced rats. The animals were placed into two groups: (1) the study group, rats received sodium salicylate (SS) at the dose of 200 mg/kg twice a day for two weeks, and then 0.4 mg of the NPPC per day, between the 14th and 28th days, (2) the placebo group, rats received saline for two weeks, and then the NPPC alone between the 14th and 28th days. The gap pre-pulse inhibition of the acoustic startle (GPIAS), the pre-pulse inhibition (PPI), and the ABR assessments were performed on animals in both groups three times (baseline, day 14, and 28). The GPIAS value declined after 14 consecutive days of the SS injection, while NPPC treatment augmented the GPIAS score in the study group on the 28th day. The PPI outcomes revealed no significant changes, indicating hearing preservation after the SS and NPPC administrations. Moreover, some changes in ABR characteristics were observed following SS injection, including (1) higher ABR thresholds, (2) lowered waves I and II amplitudes at the frequencies of 6, 12, and 24 kHz and wave III at the 12 kHz, (3) elevated amplitude ratios, and (4) prolongation in brainstem transmission time (BTT). All the mentioned variables returned to their normal values after applying the NPPC. The NPPC use could exert positive therapeutic effects on the tinnitus-induced rats and improve their ABR parameters.
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Affiliation(s)
- Mohammad Farhadi
- ENT and Head and Neck Research Center, The Five Senses Health Institute, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Ali Gorji
- Epilepsy Research Center, Department of Neurosurgery Westfälische Wilhelms-Universitat Münster, Münster, Germany
- Neuroscience Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
- Shefa Neuroscience Research Center Khatam Alanbia Hospital, Tehran, Iran
| | - Marjan Mirsalehi
- ENT and Head and Neck Research Center, The Five Senses Health Institute, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Marcus Müller
- Translational Hearing Research, Tübingen Hearing Research Center, Department of Otolaryngology, Head & Neck Surgery, University of Tübingen, 72076, Tübingen, Germany
| | - Alexander Borisovich Poletaev
- Clinical and Research Center of Children Psycho-Neurology, Moscow, Russian Federation
- Medical Research Centre “Immunculus”, Moscow, Russian Federation
| | | | - Abdoreza Asadpour
- Intelligent Systems Research Center, Ulster University, Magee Campus, Derry∼Londonderry, Northern Ireland, UK
| | - Mohammad Ebrahimi
- The Research Center for New Technologies in Life Sciences Engineering, Tehran University, Tehran, Iran
| | - Mohaddeseh Beiranvand
- ENT and Head and Neck Research Center, The Five Senses Health Institute, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Mohaddeseh Dehghani Khaftari
- ENT and Head and Neck Research Center, The Five Senses Health Institute, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Zeinab Akbarnejad
- ENT and Head and Neck Research Center, The Five Senses Health Institute, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Saeid Mahmoudian
- ENT and Head and Neck Research Center, The Five Senses Health Institute, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
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Montazeri K, Farhadi M, Akbarnejad Z, Asadpour A, Majdabadi A, Fekrazad R, Mahmoudian S. Acoustic and optoacoustic stimulations in auditory brainstem response test in salicylate induced tinnitus. Sci Rep 2023; 13:11930. [PMID: 37488197 PMCID: PMC10366222 DOI: 10.1038/s41598-023-39033-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Accepted: 07/19/2023] [Indexed: 07/26/2023] Open
Abstract
As a common debilitating disorder worldwide, tinnitus requires objective assessment. In the auditory brainstem response (ABR) test, auditory potentials can be evoked by acoustic or optoacoustic (induced by laser light) stimulations. In order to use the ABR test in the objective assessment of tinnitus, in this study, acoustic ABR (aABR) and optoacoustic ABR (oABR) were compared in the control and tinnitus groups to determine the changes caused by sodium salicylate (SS)-induced tinnitus in rat. In both aABR and oABR, wave II was the most prominent waveform, and the amplitude of wave II evoked by oABR was significantly higher than that of aABR. Brainstem transmission time (BTT), which represents the time required for a neural stimulation to progress from the auditory nerve ending to the inferior colliculus, was significantly shorter in oABR. In the tinnitus group, there was a significant increase in the threshold of both ABRs and a significant decrease in the amplitude of wave II only in the oABR. Based on our findings, the ABR test has the potential to be used in the assessment of SS-induced tinnitus, but oABR has the advantages of producing more prominent waveforms and significantly reducing the amplitude of wave II in tinnitus.
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Affiliation(s)
- Katayoon Montazeri
- ENT and Head and Neck Research Center, The Five Senses Health Institute, School of Medicine, Hazrate Rasoul Akram Hospital, Iran University of Medical Sciences, Tehran, 1445613131, Iran
| | - Mohammad Farhadi
- ENT and Head and Neck Research Center, The Five Senses Health Institute, School of Medicine, Hazrate Rasoul Akram Hospital, Iran University of Medical Sciences, Tehran, 1445613131, Iran
| | - Zeinab Akbarnejad
- ENT and Head and Neck Research Center, The Five Senses Health Institute, School of Medicine, Hazrate Rasoul Akram Hospital, Iran University of Medical Sciences, Tehran, 1445613131, Iran
| | - Abdoreza Asadpour
- Intelligent Systems Research Centre, Ulster University, Derry Campus, Derry~Londonderry, Northern Ireland, UK
| | - Abbas Majdabadi
- Laser Research Center of Dentistry, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Reza Fekrazad
- Radiation Sciences Research Center, Laser Research Center in Medical Sciences, AJA University of Medical Sciences, Tehran, Iran
| | - Saeid Mahmoudian
- ENT and Head and Neck Research Center, The Five Senses Health Institute, School of Medicine, Hazrate Rasoul Akram Hospital, Iran University of Medical Sciences, Tehran, 1445613131, Iran.
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Asadpour A, Jahed M, Mahmoudian S. Aberrant Frequency Related Change-Detection Activity in Chronic Tinnitus. Front Neurosci 2020; 14:543134. [PMID: 33192241 PMCID: PMC7645156 DOI: 10.3389/fnins.2020.543134] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Accepted: 10/05/2020] [Indexed: 11/13/2022] Open
Abstract
Tinnitus is the perception of sound without the occurrence of an acoustic event. The deficit in auditory sensory or echoic memory may be the cause of the perception of tinnitus. This study considered the mismatch negativity (MMN) to investigate the potential difference between and within groups of persons with normal hearing (NH) and tinnitus. Using an auditory multi-feature paradigm to elicit the MMN, this study considered the MMN peak amplitude at two central frequencies for two MMN subcomponents. These central frequencies were 1 and 5 kHz, which the latter was closer to the perceived tinnitus frequency in the group with tinnitus. The deviants were higher frequency, lower frequency, higher intensity, lower intensity, duration, location (left), location (right), and gap. The pure tone audiometry (PTA) test and distortion product otoacoustic emissions (DPOAE) test showed no meaningful difference between the two groups. For the frontal subcomponent, the mean amplitudes of the MMN peak for the two groups illustrated less negative meaningful MMN peak amplitudes in the group of persons with tinnitus. For the supratemporal component at 5 kHz central frequency, amplitudes were lower for the group of persons with tinnitus, whereas for the central frequency of 1 kHz, most deviants exhibited meaningful differences. Additionally, within-group comparisons indicated that mean amplitudes for both groups were more negative at the central frequency of 1 kHz for the frontal MMN subcomponent. In comparison, the supratemporal component illustrated a lower peak amplitude at 5 kHz central frequency in the group of persons with tinnitus and no difference in the NH group, which is a unique observation of this study. Results of the between-groups are in accordance with previous studies and within-group comparisons consider the probability of decreasing the change detection capability of the brain. The results of this study indicate that increasing the frequency of the stimuli close to the tinnitus perceived frequencies decreases the prediction error, including the prediction error of the silence. Such a decrease may cause the prediction error of the spontaneous neural activity in the auditory pathway to exceed the silence prediction error, and as a result, increases the probability of occurrence of tinnitus in higher frequencies according to the predictive coding model.
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Affiliation(s)
- Abdoreza Asadpour
- School of Electrical Engineering, Sharif University of Technology, Tehran, Iran
| | - Mehran Jahed
- School of Electrical Engineering, Sharif University of Technology, Tehran, Iran
| | - Saeid Mahmoudian
- ENT-Head and Neck Research Center, Hazrat Rasoul Akram Hospital, Iran University of Medical Sciences, Tehran, Iran.,The Five Senses Health Institute, Iran University of Medical Sciences, Tehran, Iran
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Mohebbi M, Daneshi A, Asadpour A, Mohsen S, Farhadi M, Mahmoudian S. The potential role of auditory prediction error in decompensated tinnitus: An auditory mismatch negativity study. Brain Behav 2019; 9:e01242. [PMID: 30895749 PMCID: PMC6456780 DOI: 10.1002/brb3.1242] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Revised: 12/08/2018] [Accepted: 12/10/2018] [Indexed: 01/25/2023] Open
Abstract
INTRODUCTION Some tinnitus subjects habituate to their tinnitus but some others do not and complain of its annoyance tremendously. Normal sensory memory and change detection processes are needed for detecting the tinnitus signal as a prediction error and habituation to tinnitus. The purpose of this study was to compare auditory mismatch negativity as the index of sensory memory and change detection among the studied groups to search for the factors involving in the perception of tinnitus and preventing habituation in decompensated tinnitus subjects. METHODS Electroencephalography was recorded from scalp electrodes in compensated tinnitus, decompensated tinnitus, and no tinnitus control subjects. Mismatch negativity was obtained using the oddball paradigm with frequency, duration, and silent gap deviants. Amplitude, latency, and area under the curve of mismatch negativities were compared among the three studied groups. RESULTS The results showed lower mismatch negativity amplitude and area under the curve for the higher frequency deviant and for the silent gap deviant in decompensated tinnitus group compared to normal control and compensated tinnitus group. CONCLUSIONS This study revealed a deficit in sensory memory and change detection processing in decompensated tinnitus subjects. This causes persistent prediction errors; tinnitus signal is consistently detected as a new signal and activates the brain salience network and consequently prevents habituation to tinnitus. Mismatch negativity is proposed as an index for monitoring tinnitus rehabilitation.
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Affiliation(s)
- Mehrnaz Mohebbi
- ENT and Head & Neck Research Center and Department, The Five Senses InstituteHazrat Rasoul Akram Hospital, Iran University of Medical SciencesTehranIran
| | - Ahmad Daneshi
- ENT and Head & Neck Research Center and Department, The Five Senses InstituteHazrat Rasoul Akram Hospital, Iran University of Medical SciencesTehranIran
| | - Abdoreza Asadpour
- Department of Electrical EngineeringSharif University of TechnologyTehranIran
| | - Samer Mohsen
- Department of Otolaryngology, Faculty of MedicineDamascus UniversityDamascusSyria
| | - Mohammad Farhadi
- ENT and Head & Neck Research Center and Department, The Five Senses InstituteHazrat Rasoul Akram Hospital, Iran University of Medical SciencesTehranIran
| | - Saeid Mahmoudian
- ENT and Head & Neck Research Center and Department, The Five Senses InstituteHazrat Rasoul Akram Hospital, Iran University of Medical SciencesTehranIran
- Department of OtorhinolaryngologyHannover Medical University (MHH)HannoverGermany
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Asadpour A, Alavi A, Jahed M, Mahmoudian S. Cognitive Memory Comparison Between Tinnitus and Normal Cases Using Event-Related Potentials. Front Integr Neurosci 2018; 12:48. [PMID: 30369872 PMCID: PMC6194311 DOI: 10.3389/fnint.2018.00048] [Citation(s) in RCA: 8] [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] [Received: 03/31/2018] [Accepted: 09/25/2018] [Indexed: 12/30/2022] Open
Abstract
About 20 percent of people above 60 years old suffer from tinnitus though no definitive treatment has been found for it. Evaluation of electrical brain activity using Event-Related Potentials (ERPs) is one of the methods to investigate the underlying reasons of tinnitus perception. Previous studies using ERPs suggest that the precognitive memory in tinnitus groups is negatively affected in comparison to the normal hearing groups. In this study, cognitive memory has been assessed using visual and auditory P300 response with oddball paradigm. Fifteen chronic tinnitus subjects and six normal hearing subjects participated in the experiment. T-test with significance level of 0.05 was applied on amplitude and latency of auditory and visual P300 for all electroencephalography (EEG) channels separately to compare tinnitus and normal hearing groups where the tinnitus group showed meaningful lower amplitude of auditory P300 peak in three EEG channels.
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Affiliation(s)
- Abdoreza Asadpour
- Department of Electrical Engineering, Sharif University of Technology, Tehran, Iran
| | - Ali Alavi
- Department of Electrical Engineering, Sharif University of Technology, Tehran, Iran
| | - Mehran Jahed
- Department of Electrical Engineering, Sharif University of Technology, Tehran, Iran
| | - Saeid Mahmoudian
- ENT and Head & Neck Research Center, Iran University of Medical Sciences (IUMS), Tehran, Iran
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Asadpour A, Jahed M, Mahmoudian S. Brain Waves Evaluation of Sound Therapy in Chronic Subjective Tinnitus Cases Using Wavelet Decomposition. Front Integr Neurosci 2018; 12:38. [PMID: 30283307 PMCID: PMC6156368 DOI: 10.3389/fnint.2018.00038] [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] [Received: 03/31/2018] [Accepted: 08/30/2018] [Indexed: 11/24/2022] Open
Abstract
Management and treatment of subjective tinnitus is an ongoing focus of research activities. One of the most viable assessments of such treatment is the evaluation of brain activity in addition to patient response and clinical assessment. This study focuses on sound therapy and evaluation of patients’ electroencephalogram (EEG) in order to verify the potency of this approach. Broadband sound therapy was applied to nineteen participants aging from 25 to 64 and suffering from chronic subjective tinnitus to study the difference of brain activity, a) before fake treatment, b) after fake treatment and c) after the main treatment, using EEG and Visual Analog Scale (VAS) for evaluating Residual Inhibition (RI). Four features were extracted using 4-level wavelet decomposition with Symlet 8 as its mother wavelet. For the “After the main treatment” stage, the mean value of wavelet coefficients for the last wavelet level, which corresponded to delta band of EEG, was lower in the FC3 channel based on Two-Sample T-Test with significance level of 0.01, as compared to the same channel of the “before the treatment” stage, for cases in which decreased tinnitus loudness were reported.
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Affiliation(s)
- Abdoreza Asadpour
- Department of Electrical Engineering, Sharif University of Technology, Tehran, Iran
| | - Mehran Jahed
- Department of Electrical Engineering, Sharif University of Technology, Tehran, Iran
| | - Saeid Mahmoudian
- ENT and Head & Neck Research Center, Iran University of Medical Sciences (IUMS), Tehran, Iran
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Asadpour A, Riazi-Rad F, Khaze V, Ajdary S, Alimohammadian MH. Distinct strains of Leishmania major induce different cytokine mRNA expression in draining lymph node of BALB/c mice. Parasite Immunol 2013; 35:42-50. [PMID: 23106526 DOI: 10.1111/pim.12018] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2012] [Accepted: 10/15/2012] [Indexed: 11/26/2022]
Abstract
Four genotypically distinct strains of L. major collected from persons residing in different endemic areas of cutaneous leishmaniasis in Iran were evaluated in BALB/c mice. Parasite virulence was evaluated by measuring the parasite burden in the lymph nodes. Immunogenicity of the strains was assessed by analysis of cytokines mRNA expression levels in popliteal lymph nodes of the mice in early (3, 16, 40 h) and late (week 1, W3, W5 and W8) time periods after infection. The expression of cytokines mRNA, namely Ifng, Il2,Il4,Il10 and Il12, was quantitated by real-time PCR. The lowest and the highest parasite loads were induced by Damghan (2·15 × 10⁷) and Shiraz (9·59 × 10⁹) strains, respectively. Moreover, Damghan strain elicited higher expression levels of Ifng and Il2 mRNA and the highest ratio of Ifng/Il4 mRNA expression compared with the other strains at 40 h and 8 weeks post-infection. The results indicate that the inoculation of BALB/c mice with different strains induced high diversity in parasite burden and cytokines gene expression. Amongst the four strains, Damghan strain showed the lowest parasite load and the highest tendency to induce expression of Th1 cytokines gene and might be considered as a safe and immunogenic strain.
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Affiliation(s)
- A Asadpour
- Immunology Department, Pasteur Institute of Iran, Tehran, Iran
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Taghavi R, Mogharabian N, Jahed Ataeian S, Asadpour A. UP-03.014 The Effect of Acupuncture on Relieving Pain Following Inguinal Surgeries. Urology 2011. [DOI: 10.1016/j.urology.2011.07.1104] [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: 10/16/2022]
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Taghavi R, Mogharabian N, Jahed Ataeian S, Asadpour A. UP-02.188 Comparing PSA and Free PSA Serum Levels in Fresh and Frozen Blood Samples. Urology 2011. [DOI: 10.1016/j.urology.2011.07.1006] [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: 11/16/2022]
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Taghavi R, Mahdavi Zafarghandi R, Mogharabian N, Jahed Ataeian S, Asadpour A. UP-03.032 Marginal Cadaveric Pediatric Donors and Adult Recipients. Urology 2011. [DOI: 10.1016/j.urology.2011.07.1122] [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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Pourmand G, Saraji A, Salem S, Mehrsai A, Nikoobakht M, Taherimahmoudi M, Rezaeidanesh M, Asadpour A. MP-03.07: Could Prophylactic Monoclonal Antibody Blocker Injection Help Kidney Graft Survival? Urology 2009. [DOI: 10.1016/j.urology.2009.07.1047] [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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Asadpour A, Shamsa A, Yarmohamadi A, Ahmadnia H. UP-1.161: Ureteral Complications in Renal Transplantation Based on Anastomotic Diameter. Urology 2009. [DOI: 10.1016/j.urology.2009.07.608] [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]
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Pourmand G, Solgi G, Mehrsai A, Niknam M, Ebrahimi Rad M, Saraji A, Asadpour A, Moheiydin M, Nikbin B, Amirzargar A. MP-03.08: Effect of Donor Bone Marrow Cells Infusion on Alloimmunization in Kidney Allograft Patients. Urology 2009. [DOI: 10.1016/j.urology.2009.07.1048] [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: 11/29/2022]
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Pourmand G, Saraji A, Salem S, Mehrsai A, Nikoobakht MR, Taherimahmoudi M, Rezaeidanesh M, Asadpour A. Could prophylactic monoclonal antibody improve kidney graft survival? Transplant Proc 2009; 41:2794-6. [PMID: 19765437 DOI: 10.1016/j.transproceed.2009.07.044] [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: 11/26/2022]
Abstract
OBJECTIVES This study was designed to evaluate the impact of daclizumab monoclonal antibody on early and late kidney graft survival. MATERIALS AND METHODS From 2007 to 2008, 57 kidney transplant recipients were followed for a mean of 9.3 months. Twenty-three patients received 1 mg/kg daclizumab 24 hours before and 14 days after transplantation. In contrast, 34 patients (controls) did not receive daclizumab. The same immunosuppressive protocol was administered to all participants: oral prednisolone, mycophenolate mofetil, and cyclosporine. Delayed graft function (DGF), acute rejection, prednisolone pulses and/or antithymoglobulin (ATG), cytomegalovirus (CMV) infection, urinary tract infection (UTI), as well as early and late graft function were compared between the two groups. RESULTS The mean age in cases and controls was 39.7 and 37.1 years, respectively. The occurrence of DGF was 4% versus 3%; reversible acute rejection, 16% versus 14.5%, and irreversible acute rejection 0% versus 9% (P < .05) for treated versus control groups, respectively. ATG was used in 21% versus 23%, and pulse prednisolone 26% versus 20%, respectively. In case and control groups, the mean creatinine levels were 1.4 mg/dL versus 1.35 mg/dL at discharge. At last follow-up, it was 1.35 mg/dL versus 1.2 mg/dL, respectively. CMV infection occurred in 30% versus 35%, and UTI in 17% versus 19% of treated versus controls, respectively. CONCLUSION The prophylactic administration of daclizumab improved early graft survival and prevented irreversible acute rejection.
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Affiliation(s)
- G Pourmand
- Urology Research Center, Sina Hospital, Tehran University of Medical Sciences, Tehran, Iran.
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Saraji A, Pourmand G, Mehrsai A, Taherimahmodi M, Nikoobakht M, Asadpour A, Nikbin B, Tajik N, Emamzadeh A. Microchimerism and renal transplantation: doubt still persists. Transplant Proc 2007; 39:948-50. [PMID: 17524859 DOI: 10.1016/j.transproceed.2007.03.082] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
OBJECTIVE We sought to study microchimerism in a group of kidney transplant recipients. MATERIALS AND METHODS In this study, the peripheral blood microchimerism (PBM) after renal transplantation was retrospectively evaluated in 32 male-to-female recipients of living unrelated or cadaveric donor renal transplants. Using a nested polymerase chain reaction (PCR) amplification specific for SRY region of the Y chromosome, microchimerism was detected with a sensitivity of 1:1,000,000. Recipients were compared according to the presence of PBM, acute and chronic rejection episodes, type of allotransplant, recipient and donor age at transplantation, previous male labor or blood transfusion, allograft function (serum creatinine level), and body mass index. RESULTS Among 32 recipients, 7 (21.9%) were positive for PBM upon multiple testing at various posttransplant times. All microchimeric recipients had received kidneys from living unrelated donors. No significant difference was observed with regard to other parameters. In addition the acute rejection rate in the microchimeric group was 3 (42%) versus 4 (16%) in the nonmicrochimeric recipients (not significant). CONCLUSION Our results suggested better establishment of microchimerism after living donor kidney transplantation. However, doubt persists concerning the true effect of microchimerism after renal transplantation. It seems that microchimerism alone has no major protective role upon renal allograft survival.
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Affiliation(s)
- A Saraji
- Urology Research Center, Kidney Transplantation Unit, Tehran, Iran.
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