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Hosseinzadeh A, Pourhanifeh MH, Amiri S, Sheibani M, Irilouzadian R, Reiter RJ, Mehrzadi S. Therapeutic potential of melatonin in targeting molecular pathways of organ fibrosis. Pharmacol Rep 2024; 76:25-50. [PMID: 37995089 DOI: 10.1007/s43440-023-00554-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2023] [Revised: 10/29/2023] [Accepted: 10/31/2023] [Indexed: 11/24/2023]
Abstract
Fibrosis, the excessive deposition of fibrous connective tissue in an organ in response to injury, is a pathological condition affecting many individuals worldwide. Fibrosis causes the failure of tissue function and is largely irreversible as the disease progresses. Pharmacologic treatment options for organ fibrosis are limited, but studies suggest that antioxidants, particularly melatonin, can aid in preventing and controlling fibrotic damage to the organs. Melatonin, an indole nocturnally released from the pineal gland, is commonly used to regulate circadian and seasonal biological rhythms and is indicated for treating sleep disorders. While it is often effective in treating sleep disorders, melatonin's anti-inflammatory and antioxidant properties also make it a promising molecule for treating other disorders such as organ fibrosis. Melatonin ameliorates the necrotic and apoptotic changes that lead to fibrosis in various organs including the heart, liver, lung, and kidney. Moreover, melatonin reduces the infiltration of inflammatory cells during fibrosis development. This article outlines the protective effects of melatonin against fibrosis, including its safety and potential therapeutic effects. The goal of this article is to provide a summary of data accumulated to date and to encourage further experimentation with melatonin and increase its use as an anti-fibrotic agent in clinical settings.
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Affiliation(s)
- Azam Hosseinzadeh
- Razi Drug Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Mohammad Hossein Pourhanifeh
- Research Center for Biochemistry and Nutrition in Metabolic Diseases, Institute for Basic Sciences, Kashan University of Medical Sciences, Kashan, Iran
| | - Shiva Amiri
- Pharmaceutics Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran
| | - Mohammad Sheibani
- Razi Drug Research Center, Iran University of Medical Sciences, Tehran, Iran
- Department of Pharmacology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Rana Irilouzadian
- Clinical Research Development Unit of Shohada-e Tajrish Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Russel J Reiter
- Department of Cell Systems and Anatomy, UT Health San Antonio, San Antonio, TX, USA
| | - Saeed Mehrzadi
- Razi Drug Research Center, Iran University of Medical Sciences, Tehran, Iran.
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Jafari-Sabet M, Amiri S, Sheibani M, Fatahi N, Aghamiri H. Cross state-dependent memory retrieval between tramadol and ethanol: involvement of dorsal hippocampal GABAA receptors. Psychopharmacology (Berl) 2024; 241:139-152. [PMID: 37758936 DOI: 10.1007/s00213-023-06469-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Accepted: 09/18/2023] [Indexed: 09/29/2023]
Abstract
RATIONALE Tramadol and ethanol, as psychoactive agents, are often abused. Discovering the molecular pathways of drug-induced memory creation may contribute to preventing drug addiction and relapse. OBJECTIVE The tramadol- and ethanol-induced state-dependent memory (SDM) and cross-SDM retrieval between tramadol and ethanol were examined in this study. Moreover, because of the confirmed involvement of GABAA receptors and GABAergic neurotransmission in memory retrieval impairment, we assessed cross-SDM retrieval between tramadol and ethanol with a specific emphasis on the role of the GABAA receptors. The first hypothesis of this study was the presence of cross-SDM between tramadol and ethanol, and the second hypothesis was related to possible role of GABAA receptors in memory retrieval impairment within the dorsal hippocampus. The cannulae were inserted into the hippocampal CA1 area of NMRI mice, and a step-down inhibitory avoidance test was used to evaluate state dependence and memory recovery. RESULTS The post-training and/or pre-test administration of tramadol (2.5 and 5 mg/kg, i.p.) and/or ethanol (0.5 and 1 g/kg, i.p.) induced amnesia, which was restored after the administration of the drugs 24 h later during the pre-test period, proposing ethanol and tramadol SDM. The pre-test injection of ethanol (0.25 and 0.5 g/kg, i.p.) with tramadol at an ineffective dose (1.25 mg/kg) enhanced tramadol SDM. Moreover, tramadol injection (1.25 and 2.5 mg/kg) with ethanol at the ineffective dose (0.25 g/kg) promoted ethanol SDM. Furthermore, the pre-test intra-CA1 injection of bicuculline (0.0625, 0.125, and 0.25 μg/mouse), a GABAA receptor antagonist, 5 min before the injection of tramadol (5 mg/kg) or ethanol (1 g/kg) inhibited tramadol- and ethanol-induced SDM dose-dependently. CONCLUSION The findings strongly confirmed cross-SDM between tramadol and ethanol and the critical role of dorsal hippocampal GABAA receptors in the cross-SDM between tramadol and ethanol.
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Affiliation(s)
- Majid Jafari-Sabet
- Razi Drug Research Center, School of Medicine, Iran University of Medical Sciences, Tehran, Iran.
- Department of Pharmacology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran.
| | - Shiva Amiri
- Pharmaceutics Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran
- Department of Toxicology and Pharmacology, Faculty of Pharmacy, Kerman University of Medical Sciences, Kerman, Iran
| | - Mohammad Sheibani
- Razi Drug Research Center, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
- Department of Pharmacology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Navid Fatahi
- Department of Pharmacology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Helia Aghamiri
- Department of Pharmacology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
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Taheriazam A, Baghbani S, Malakooti M, Jahanshahi F, Allahyari M, Dindar Mehrabani A, Amiri S. Neuromonitoring in pre-post and intraoperative total hip replacement surgery in type 4 high-riding developmental dysplasia of the hip. Eur Rev Med Pharmacol Sci 2024; 28:98-106. [PMID: 38235862 DOI: 10.26355/eurrev_202401_34895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 01/19/2024]
Abstract
OBJECTIVE The choice approach to treating congenital dislocation of the hip joint is total hip replacement (THR). One of the severe but uncommon complications of THR is nerve damage. The most common nerve injury associated with total hip arthroplasty (THA) is sciatic nerve palsy, and the second typical nerve damage with THA is femoral nerve paralysis. PATIENTS AND METHODS In this prospective cohort study, 35 patients with type 4 high riding developmental dysplasia of the hip (DDH) who were candidates for THA were enrolled. The somatosensory evoked potential (SSEP), motor evoked potential (MEP), and electromyography (EMG) were measured pre-post and intraoperatively to check the status of the sciatic and femoral nerves. After collecting the mentioned information, the data was analyzed by SPSS V. 26 software. RESULTS Out of 35 patients with DDH type 4 who were candidates for THR, nine patients showed a 50 percent decrease in SSEP amplitude, and six patients showed a 10 percent decrease in SSEP latency. One patient during and two patients after the surgery showed more than an 80 percent decrease in MEP amplitude. Meanwhile, 14 patients showed abnormal spikes during and two patients after surgery regarding EMG. All patients with disturbed neurophysiological findings reverted to normal in the further investigation during follow-up. No correlation was found between increasing limb shortness and these modalities. CONCLUSIONS Using neuromonitoring techniques during Total Hip Arthroplasty (THA) can help identify potential early nerve damage, prevent post-surgical complications, and improve high-riding DDH patient outcomes.
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Affiliation(s)
- A Taheriazam
- Department of Orthopedics, School of Medicine, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran.
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Amiri S, Puillet L, Huau C, Fassier T, Rupp R, Friggens NC. Analysis of reproduction success, growth and milk trajectories and response to nutritional challenge in two Alpine goat lines selected on divergent longevity. Animal 2023; 17:101004. [PMID: 37944363 DOI: 10.1016/j.animal.2023.101004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 09/20/2023] [Accepted: 09/28/2023] [Indexed: 11/12/2023] Open
Abstract
This study aims to investigate whether the variation in reproduction success, growth, and milk trajectories is associated with different adaptive strategies in the short term (response to an acute nutritional challenge), using two Alpine goat lines. A total of 382 Alpine goats (179 low longevity (low_LGV) and 203 high longevity (high_LGV)), selected for divergent functional longevity from a commercial population, were monitored for 4 years and recorded for BW, reproduction and milking performance. Every year, an average of fifty primiparous goats were exposed to a 2-d nutritional challenge in early lactation. A polynomial model was used to analyse the lifetime trajectory of lactation and BW. A piecewise model was used to analyse the individual milk yield and responses of milk components to the nutritional challenges. The statistical analysis revealed that the two lines had a similar performance for total milk yield in the first lactation, BW at birth and at first kidding, litter size and weight, kidding interval and interval from the first insemination to conception. BW trajectories revealed that low_LGV goats had a greater BW in pregnancy but then lost more weight in early lactation compared to high_LGV goats, which showed a greater BW after kidding. Milk trajectories showed that the high_LGV goats had a higher initial milk yield, an earlier but less marked lactation peak and more persistency in milk production in late lactation than low_LGV goats. Except for milk protein content, quite similar response and recovery profiles of milk yield and milk fat content were observed during the challenge for both lines. The response to the challenge was positively correlated to the initial level of milk production in early lactation but negatively correlated with milk production decline after the peak. This finding suggests that the low_LGV goats were more adapted to allocate resources to meet an expected physiological change such as gestation and lactation. However, high_LGV goats allocate more than low_LGV goats for structural mass and may better cope with an unexpected environmental change such as nutritional deficit.
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Affiliation(s)
- S Amiri
- UMR 0791 Modélisation Systémique Appliquée aux Ruminants, INRAE, AgroParisTech, Université Paris-Saclay, 75005 Paris, France
| | - L Puillet
- UMR 0791 Modélisation Systémique Appliquée aux Ruminants, INRAE, AgroParisTech, Université Paris-Saclay, 75005 Paris, France
| | - C Huau
- GenPhySE, Université de Toulouse, INRAE, INPT, ENVT, Castanet Tolosan, France
| | - T Fassier
- UE P3R Bourges, domaine de Bourges, INRAE, Osmoy F-31326, France
| | - R Rupp
- GenPhySE, Université de Toulouse, INRAE, INPT, ENVT, Castanet Tolosan, France.
| | - N C Friggens
- UMR 0791 Modélisation Systémique Appliquée aux Ruminants, INRAE, AgroParisTech, Université Paris-Saclay, 75005 Paris, France
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Amiri Z, Azmin M, Amiri S, Akbarisari A, Sahraian MA, Farzadfar F, Soleymani F. Prevalence of comorbidities in patients with multiple sclerosis using administrative data from 2007 to 2016 in Iran. Mult Scler Relat Disord 2023; 74:104693. [PMID: 37031549 DOI: 10.1016/j.msard.2023.104693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Revised: 02/27/2023] [Accepted: 03/30/2023] [Indexed: 04/03/2023]
Abstract
BACKGROUND Research interest in the impact of comorbidities in MS has been expanding. Based on studies, certain comorbidities are more prevalent in MS population such as depression, anxiety, hypertension and hypercholesterolemia, diabetes, and hypothyroidism. OBJECTIVE This study aims to describe the prevalence of comorbidities in MS population based on the health insurance claims data. METHOD This retrospective database analysis was conducted using patient-level medicinal and pharmacy claims data from a leading insurance group (Iranian health insurance) in 2007-2016. MS population was identified based on their Disease Modifying Therapies prescribed by a neurologist (qualified to diagnose MS). Comorbidities in MS and non-MS population were assessed by their prescriptions. Crude and age-standardized prevalence rate (ASPR) of coverage of comorbidities in different age and sex groups and their odds ratio versus non-MS population were assessed. RESULTS The most common comorbidities were depression (15.50%) and anxiety (10.1%). Hypercholesterolemia, diabetes, hypertension, and hypothyroidism were prevalent in 6%, 3.6%, 3.5%, and 2.7% respectively. Anxiety and depression were more prevalent in middle age group (45-65 years old). But other comorbidities were more prevalent in older age groups. All comorbidities were more prevalent in female except hypertension in patients ≥45 years old. The odds of all comorbidities were higher for male patients with MS rather than their parallel age group in non-MS patients. These also applied for female patients with MS 18-44 years old (except hypertension). CONCLUSION Using claims data, the prevalence of taking treatment for selected comorbidities in MS population and their association with sex and age, can guide patients, healthcare providers, and policy makers to help improve MS patients' wellbeing.
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Affiliation(s)
- Zahra Amiri
- Department of Pharmacoeconomics and Pharmaceutical Management, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran; School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Mehrdad Azmin
- Non-Communicable Diseases Research Center, Endocrinology and Metabolism Population Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Shiva Amiri
- Pharmaceutics Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran; Department of Toxicology and Pharmacology, Faculty of Pharmacy, Kerman University of Medical Sciences, Kerman, Iran
| | - Ali Akbarisari
- Department of Health Management, Policy & Economics, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran; Head of the National Institute of Health Research (NIHR), Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammad Ali Sahraian
- MS Research Center, Neuroscience Institute, Tehran University of Medical Sciences, Sina Hospital, Tehran University Medical Sciences, Tehran, Iran
| | - Farshad Farzadfar
- Non-Communicable Diseases Research Center, Endocrinology and Metabolism Population Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran; Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Fatemeh Soleymani
- Department of Pharmacoeconomics and Pharmaceutical Management, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran.
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Bazrafshani MS, Pardakhty A, Kalantari Khandani B, Tajadini H, Ghazanfari Pour S, Hashemi S, Amiri S, Mehmandoost S, Beigzadeh A, Abbaszadeh S, Sharifi H. The prevalence and predictors of herb-drug interactions among Iranian cancer patients during chemotherapy courses. BMC Complement Med Ther 2023; 23:41. [PMID: 36750849 PMCID: PMC9903537 DOI: 10.1186/s12906-023-03869-1] [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] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2022] [Accepted: 01/31/2023] [Indexed: 02/09/2023] Open
Abstract
BACKGROUND The concurrent usage of herbal medicines with conventional therapies is an important concern in cancer treatment which can lead to unexpected consequences like herb-drug interactions. This study aimed to determine the prevalence of potential herb-drug interactions and to predict factors associated with herb-drug interactions for cancer patients. METHODS This cross-sectional study was conducted among a convenience sample of 315 cancer patients referring to the oncology clinics of Kerman city in 2018. Data were collected via comprehensive face-to-face interviews and medical chart reviews. A drug interaction checker was used to determine herb-drug interactions. The information of patients was compared based on herb-drug interactions using bivariable logistic regression models, and predictors were determined by the multivariable logistic regression model. All analyses were performed by Stata software version 16. RESULTS Of 262 patients (83.2% of the patients) who used herbal medicines, 209 patients [79.8% (95% Confidence Intervals (CI): 75.2 - 85.1)] had potential herb-drug interactions. Chamomile was the most popular herbal medicine (n = 163, 78.0%), and minor and moderate herb-drug interactions were caused by green tea (n = 34, 16.3%) and peppermint (n = 78, 37.5%). The number of chemotherapeutic agents (OR: 1.92, 95% CI: 1.43-2.58; P-value < 0.0001) and the experienced of pain during chemotherapy courses (OR = 2.22, 95%CI:1.00-4.94; P-value = 0.04) were some of the predictors of herb-drug interactions among cancer patients. CONCLUSION Herbal medicine use during chemotherapy was found prevalent among cancer patients; of them, the experience of potential herb-drug interactions was highly frequent. Oncologists and clinical pharmacologists are recommended to take into account challenges associated with herb-drug interactions in their routine practices, particularly during chemotherapy among these patients.
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Affiliation(s)
- Maliheh Sadat Bazrafshani
- grid.412105.30000 0001 2092 9755HIV/STI Surveillance Research Center, and WHO Collaborating Center for HIV Surveillance, Institute for Futures Studies in Health, Kerman University of Medical Sciences, Kerman, 7616914111 Iran
| | - Abbas Pardakhty
- Pharmaceutics Research Center, Neuropharmacology Institute, Kerman University of Medical Sciences, Kerman, Iran.
| | - Behjat Kalantari Khandani
- grid.412105.30000 0001 2092 9755Department of Internal Medicine, Hematology and Oncology Division, Kerman University of Medical Sciences, Kerman, Iran
| | - Haleh Tajadini
- grid.412105.30000 0001 2092 9755Physiology Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran
| | - Sadra Ghazanfari Pour
- grid.412105.30000 0001 2092 9755Student Research Committee, Kerman University of Medical Sciences, Kerman, Iran
| | - Sara Hashemi
- grid.412105.30000 0001 2092 9755Departement of Medical Chemistry, Faculty of Pharmacy, Kerman University of Medical Sciences, Kerman, Iran
| | - Shiva Amiri
- grid.412105.30000 0001 2092 9755Pharmaceutics Research Center, Neuropharmacology Institute, Kerman University of Medical Sciences, Kerman, Iran ,grid.412105.30000 0001 2092 9755Department of Toxicology and Pharmacology, Faculty of Pharmacy, Kerman University of Medical Sciences, Kerman, Iran
| | - Soheil Mehmandoost
- grid.412105.30000 0001 2092 9755HIV/STI Surveillance Research Center, and WHO Collaborating Center for HIV Surveillance, Institute for Futures Studies in Health, Kerman University of Medical Sciences, Kerman, 7616914111 Iran
| | | | - Samaneh Abbaszadeh
- grid.412105.30000 0001 2092 9755HIV/STI Surveillance Research Center, and WHO Collaborating Center for HIV Surveillance, Institute for Futures Studies in Health, Kerman University of Medical Sciences, Kerman, 7616914111 Iran
| | - Hamid Sharifi
- HIV/STI Surveillance Research Center, and WHO Collaborating Center for HIV Surveillance, Institute for Futures Studies in Health, Kerman University of Medical Sciences, Kerman, 7616914111, Iran.
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Jafari-Sabet M, Amiri S, Emami S, Aghamiri H, Fatahi N, Keyhanfar F. Dorsal hippocampal CA1 NMDA receptors mediate the interactive effects of quetiapine and lithium on memory retention in male rats. Iran J Basic Med Sci 2023; 26:1090-1097. [PMID: 37605729 PMCID: PMC10440135 DOI: 10.22038/ijbms.2023.69714.15177] [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] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Accepted: 05/14/2023] [Indexed: 08/23/2023]
Abstract
Objectives Lithium and quetiapine are administered simultaneously as a treatment for bipolar disorder. The concurrent use of these two drugs has been observed to affect the neurobiological mechanisms underlying learning and memory. To clarify the precise mechanisms involved, we evaluated the possible role of the dorsal hippocampal CA1 NMDA receptors in the interactive effects of lithium and quetiapine in memory consolidation. Materials and Methods The dorsal hippocampal CA1 regions of adult male Wistar rats were bilaterally cannulated, and a single-trial step-through inhibitory avoidance apparatus was used to assess memory consolidation. Results Post-training administration of certain doses of lithium (20, 30, and 40 mg/kg, IP) diminished memory consolidation. Post-training administration of higher doses of quetiapine (5, 10, and 20 mg/kg, IP) augmented memory consolidation. Post-training administration of certain doses of quetiapine (2.5, 5, 10, and 20 mg/kg) dose-dependently restored lithium-induced memory impairment. Post-training microinjection of ineffective doses of the NMDA (10-5 and 10-4 µg/rat, intra-CA1) plus an ineffective dose of quetiapine (2.5 mg/kg) restored the lithium-induced memory impairment. Post-training microinjection of ineffective doses of the noncompetitive NMDA receptor antagonist, MK-801 (0.0625 and 0.0125 μg/rat, intra-CA1), diminished the quetiapine-induced (10 mg/kg) memory improvement in lithium-induced memory impairment. Conclusion These findings suggest a functional interaction between lithium and quetiapine through hippocampal CA1 NMDA receptor mechanisms in memory consolidation.
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Affiliation(s)
- Majid Jafari-Sabet
- Department of Pharmacology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
- Razi Drug Research Center, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Shiva Amiri
- Pharmaceutics Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran
- Department of Toxicology and Pharmacology, Faculty of Pharmacy, Kerman University of Medical Sciences, Kerman, Iran
| | - Sahar Emami
- Department of Pharmacology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Helia Aghamiri
- Department of Pharmacology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Navid Fatahi
- Department of Pharmacology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Fariborz Keyhanfar
- Department of Pharmacology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
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Hosseinzadeh A, Bagherifard A, Koosha F, Amiri S, Karimi-Behnagh A, Reiter RJ, Mehrzadi S. Melatonin effect on platelets and coagulation: Implications for a prophylactic indication in COVID-19. Life Sci 2022; 307:120866. [PMID: 35944663 PMCID: PMC9356576 DOI: 10.1016/j.lfs.2022.120866] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2022] [Revised: 07/26/2022] [Accepted: 08/03/2022] [Indexed: 11/04/2022]
Abstract
Severe COVID-19 is associated with the dynamic changes in coagulation parameters. Coagulopathy is considered as a major extra-pulmonary risk factor for severity and mortality of COVID-19; patients with elevated levels of coagulation biomarkers have poorer in-hospital outcomes. Oxidative stress, alterations in the activity of cytochrome P450 enzymes, development of the cytokine storm and inflammation, endothelial dysfunction, angiotensin-converting enzyme 2 (ACE2) enzyme malfunction and renin–angiotensin system (RAS) imbalance are among other mechanisms suggested to be involved in the coagulopathy induced by severe acute respiratory syndrome coronavirus (SARS-CoV-2). The activity and function of coagulation factors are reported to have a circadian component. Melatonin, a multipotential neurohormone secreted by the pineal gland exclusively at night, regulates the cytokine system and the coagulation cascade in infections such as those caused by coronaviruses. Herein, we review the mechanisms and beneficial effects of melatonin against coagulopathy induced by SARS-CoV-2 infection.
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Yousafzai MS, Yadav V, Amiri S, Staddon MF, Errami Y, Jaspard G, Banerjee S, Murrell M. Cell-Matrix Elastocapillary Interactions Drive Pressure-based Wetting of Cell Aggregates. Phys Rev X 2022; 12:031027. [PMID: 38009085 PMCID: PMC10673637 DOI: 10.1103/physrevx.12.031027] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2023]
Abstract
Cell-matrix interfacial energies and the energies of matrix deformations may be comparable on cellular length-scales, yet how capillary effects influence tis sue shape and motion are unknown. In this work, we induce wetting (spreading and migration) of cell aggregates, as models of active droplets onto adhesive substrates of varying elasticity and correlate the dynamics of wetting to the balance of interfacial tensions. Upon wetting rigid substrates, cell-substrate tension drives outward expansion of the monolayer. By contrast, upon wetting compliant substrates, cell substrate tension is attenuated and aggregate capillary forces contribute to internal pressures that drive expansion. Thus, we show by experiments, data-driven modeling and computational simulations that myosin-driven 'active elasto-capillary' effects enable adaptation of wetting mechanisms to substrate rigidity and introduce a novel, pressure-based mechanism for guiding collective cell motion.
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Affiliation(s)
- M S Yousafzai
- Department of Biomedical Engineering, Yale University, 55 Prospect Street, New Haven, Connecticut 06511, USA
- Systems Biology Institute, Yale University, 850 West Campus Drive, West Haven, Connecticut 06516, USA
| | - V Yadav
- Department of Biomedical Engineering, Yale University, 55 Prospect Street, New Haven, Connecticut 06511, USA
- Systems Biology Institute, Yale University, 850 West Campus Drive, West Haven, Connecticut 06516, USA
| | - S Amiri
- Systems Biology Institute, Yale University, 850 West Campus Drive, West Haven, Connecticut 06516, USA
- Department of Mechanical Engineering and Material Science, Yale University, 10 Hillhouse Avenue, New Haven, Connecticut 06511, USA
| | - M F Staddon
- Center for Systems Biology Dresden, Dresden, Germany
- Max Planck Institute for the Physics of Complex Systems, Dresden, Germany
| | - Y Errami
- Systems Biology Institute, Yale University, 850 West Campus Drive, West Haven, Connecticut 06516, USA
- Department of Genetics, Yale School of Medicine, Sterling Hall of Medicine, 333 Cedar Street, New Haven, 06510
- Center for Cancer Systems Biology, Yale University, 850 West Campus Drive, West Haven, Connecticut 06516, USA
| | - G Jaspard
- Department of Biomedical Engineering, Yale University, 55 Prospect Street, New Haven, Connecticut 06511, USA
- Systems Biology Institute, Yale University, 850 West Campus Drive, West Haven, Connecticut 06516, USA
| | - S Banerjee
- Department of Physics, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA and
| | - M Murrell
- Department of Biomedical Engineering, Yale University, 55 Prospect Street, New Haven, Connecticut 06511, USA
- Systems Biology Institute, Yale University, 850 West Campus Drive, West Haven, Connecticut 06516, USA
- Department of Physics, Yale University, 217 Prospect Street, New Haven, Connecticut 06511, USA
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Jafari-Sabet M, Amiri S, Aghamiri H, Fatahi N. Cross state-dependent memory retrieval between cannabinoid CB1 and serotonergic 5-HT1A receptor agonists in the mouse dorsal hippocampus. Neurobiol Learn Mem 2022; 192:107638. [PMID: 35595026 DOI: 10.1016/j.nlm.2022.107638] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2021] [Revised: 04/23/2022] [Accepted: 05/13/2022] [Indexed: 10/18/2022]
Abstract
Understanding the neurobiological mechanisms of drug-related learning and memory formation may help the treatment of cognitive disorders. Dysfunction of the cannabinoid and serotonergic systems has been demonstrated in learning and memory disorders. The present paper investigates the phenomenon called state-dependent memory (SDM) induced by ACPA (a selective cannabinoid CB1 receptor agonist) and 8-OH-DPAT (a nonselective 5-HT1A receptor agonist) with special focus on the role of the 5-HT1A receptor in the effects of both ACPA and 8-OH-DPAT SDM and cross state-dependent memory retrieval between ACPA and 8-OH-DPAT in a step-down inhibitory avoidance task. The dorsal hippocampal CA1 regions of adult male NMRI mice were bilaterally cannulated, and all drugs were microinjected into the intended injection sites. A single-trial step-down inhibitory avoidance task was used to assess memory retrieval and state-dependence. Post-training and/or pre-test microinjections of ACPA (1 and 2 ng/mouse) and 8-OH-DPAT (0.5 and 1 μg/mouse) dose-dependently induced amnesia. Pre-test administration of the same doses of ACPA and 8-OH-DPAT reversed the post-training ACPA- and 8-OH-DPAT-induced amnesia, respectively. This phenomenon has been named SDM. 8-OH-DPAT (1 μg/mouse) reversed the amnesia induced by ACPA (0.5, 1, and 2 ng/mouse) and induced ACPA SDM. ACPA (2 ng/mouse) reversed the amnesia induced by 8-OH-DPAT (0.25, 0.5, and 1 μg/mouse) and induced 8-OH-DPAT SDM. Pre-test administration of a 5-HT1A receptor antagonist, (S)-WAY 100135 (0.25 and 0.5 μg/mouse), 5 min before ACPA and 8-OH-DPAT dose-dependently inhibited ACPA- and 8-OH-DPAT-induced SDM, respectively. The present study results demonstrated ACPA- and 8-OH-DPAT- induced SDM. Overall, the data revealed that dorsal hippocampal 5-HT1A receptor mechanisms play a pivotal role in modulating cross state-dependent memory retrieval between ACPA and 8-OH-DPAT.
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Affiliation(s)
- Majid Jafari-Sabet
- Razi Drug Research Center, School of Medicine, Iran University of Medical Sciences, Tehran, Iran; Department of Pharmacology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran.
| | - Shiva Amiri
- Pharmaceutics Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran; Department of Toxicology and Pharmacology, Faculty of Pharmacy, Kerman University of Medical Sciences, Kerman, Iran
| | - Helia Aghamiri
- Department of Pharmacology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Navid Fatahi
- Department of Pharmacology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
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Yousafzai MS, Yadav V, Amiri S, Errami Y, Amiri S, Murrell M. Active Regulation of Pressure and Volume Defines an Energetic Constraint on the Size of Cell Aggregates. Phys Rev Lett 2022; 128:048103. [PMID: 35148133 DOI: 10.1103/physrevlett.128.048103] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Accepted: 01/03/2022] [Indexed: 06/14/2023]
Abstract
We explore the relationship between the nonequilibrium generation of myosin-induced active stress within the F-actin cytoskeleton and the pressure-volume relationship of cellular aggregates as models of simple tissues. We find that due to active stress, aggregate surface tension depends upon its size. As a result, both pressure and cell number density depend on size and violate equilibrium assumptions. However, the relationship between them resembles an equilibrium equation of state with an effective temperature. This suggests that bulk and surface properties of aggregates balance to yield a constant average work performed by each cell on their environment in regulating tissue size. These results describe basic physical principles that govern the size of cell aggregates.
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Affiliation(s)
- M S Yousafzai
- Department of Biomedical Engineering, Yale University, 55 Prospect Street, New Haven, Connecticut 06511, USA
- Systems Biology Institute, Yale University, 850 West Campus Drive, West Haven, Connecticut 06516, USA
- Center for Cancer Systems Biology, Yale University, 850 West Campus Drive, West Haven, Connecticut 06516, USA
| | - V Yadav
- Department of Biomedical Engineering, Yale University, 55 Prospect Street, New Haven, Connecticut 06511, USA
- Systems Biology Institute, Yale University, 850 West Campus Drive, West Haven, Connecticut 06516, USA
| | - S Amiri
- Systems Biology Institute, Yale University, 850 West Campus Drive, West Haven, Connecticut 06516, USA
- Department of Mechanical Engineering and Material Science, Yale University, 10 Hillhouse Avenue, New Haven, Connecticut 06511, USA
| | - Y Errami
- Systems Biology Institute, Yale University, 850 West Campus Drive, West Haven, Connecticut 06516, USA
- Department of Genetics, Yale School of Medicine, Sterling Hall of Medicine, 333 Cedar Street, New Haven, Connecticut 06510, USA
- Center for Cancer Systems Biology, Yale University, 850 West Campus Drive, West Haven, Connecticut 06516, USA
| | - S Amiri
- Department of Biomedical Engineering, Yale University, 55 Prospect Street, New Haven, Connecticut 06511, USA
- Systems Biology Institute, Yale University, 850 West Campus Drive, West Haven, Connecticut 06516, USA
| | - M Murrell
- Department of Biomedical Engineering, Yale University, 55 Prospect Street, New Haven, Connecticut 06511, USA
- Systems Biology Institute, Yale University, 850 West Campus Drive, West Haven, Connecticut 06516, USA
- Center for Cancer Systems Biology, Yale University, 850 West Campus Drive, West Haven, Connecticut 06516, USA
- Department of Physics, Yale University, 217 Prospect Street, New Haven, Connecticut 06511, USA
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Greer M, Amiri S, Denney J, Amram O, Halasz L, Buchwald D. Disparities in Access to Radiation Oncology Facilities Among American Indian/Alaska Natives and Hispanics in Metro and Non-Metro Washington State. Int J Radiat Oncol Biol Phys 2021. [DOI: 10.1016/j.ijrobp.2021.07.992] [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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13
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Amiri S, Volkert CA, Vink RLC. Friction on incommensurate substrates: Role of anharmonicity and defects. Phys Rev E 2021; 104:014802. [PMID: 34412345 DOI: 10.1103/physreve.104.014802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Accepted: 07/06/2021] [Indexed: 11/07/2022]
Abstract
We present molecular dynamics simulations of one- and two-dimensional bead-spring models sliding on incommensurate substrates after an initial kick, in the case where the coupling to the underlying substrate is weak, i.e., energy can dissipate only into the internal degrees of freedom of the sliding object, but not into the substrate below. We investigate how sliding friction is affected by structural defects and interaction anharmonicity. In their absence, we confirm earlier findings, namely, that at special resonance sliding velocities, friction is maximal. When sliding off-resonance, partially thermalized states are possible, whereby only a small number of vibrational modes becomes excited, but whose kinetic energies are already Maxwell-Boltzmann distributed. Anharmonicity and defects typically destroy partial thermalization and instead lead to full thermalization, implying much higher friction. For sliders with periodic boundaries, thermalization begins with vibrational modes whose spatial modulation is compatible with the incommensurate lattice. For a disk-shaped slider, modes corresponding to modulations compatible with the slider radius are initially the most dominant. By tuning the mechanical properties of the slider's edge, this effect can be controlled, resulting in significant changes in the sliding distance covered.
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Affiliation(s)
- S Amiri
- Institute of Materials Physics, Georg-August-Universität Göttingen, 37073 Göttingen, Germany
| | - C A Volkert
- Institute of Materials Physics, Georg-August-Universität Göttingen, 37073 Göttingen, Germany
| | - R L C Vink
- Institute of Materials Physics, Georg-August-Universität Göttingen, 37073 Göttingen, Germany
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Amiri S, Shemshadi B, Fallahi S, Shirali S. Detection of Fasciola Hepatica in Lori Sheep Using Polymerase Chain Reaction and Conventional Diagnostic Methods in Western Iran. Arch Razi Inst 2021; 76:223-229. [PMID: 34223721 DOI: 10.22092/ari.2020.128417.1413] [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] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Accepted: 02/22/2020] [Indexed: 09/30/2022]
Abstract
Fascioliasis is an emerging and important food and water-borne disease in human communities which has become one of the most important health challenges in countries, like Iran. It causes weight loss, a decrease in feed conversion ratio as well as milk and meat production, and also reduces fertility in animals the prevalence of fasciolosis is increasing in some regions of the world due to various factors. Different methods have been used for the detection of Fasciola hepatica in animals. This study is the first to detect F. hepatica in Lori sheep using polymerase chain reaction (PCR) and conventional diagnostic methods in Western Iran. During three months, 195 fecal samples were collected from sheep in Lorestan province, Iran, using the stratified random sampling method. The conventional diagnostic methods, including wet mount microscopic examination and concentration assays, as well as the PCR technique targeting the intergenic spacer gene of F. hepatica, were used for the detection of the parasite in sheep. In total, 4 (2.1%) out of 195 examined stool samples were positive for F. hepatica based on the conventional assays. The PCR test was positive for F. hepatica in7 (3.6%) samples of 195 studied specimens. Statistical analyses of the data revealed that there is a significant difference between the results of diagnostic methods for F. hepatica detection (P=0.0421). Finally, the results showed that PCR has more diagnostic sensitivity, compared to conventional diagnostic methods, including the concentration techniques and microscopic examination. Hence, it can be advised to use PCR for the detection of F. hepatica in sheep.
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Affiliation(s)
- S Amiri
- Department of Pathobiology, Faculty of Veterinary Medicine, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - B Shemshadi
- Department of Pathobiology, Faculty of Veterinary Medicine, Science and Research Branch, Islamic Azad University, Tehran, Iran.,Department of Pathobiology, Faculty of Veterinary Medicine, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Sh Fallahi
- Hepatitis Research Center, Lorestan University of Medical Sciences, Khorramabad, Iran.,Department of Parasitology and Mycology, Faculty of Medicine, Lorestan University of Medical Sciences, Khorramabad, Iran
| | - S Shirali
- Department of Biotechnology, Faculty of Basic Sciences, Ahvaz Azad University, Ahvaz, Iran
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Ezrari S, Radouane N, Tahiri A, Amiri S, Lazraq A, Lahlali R. Environmental Effects of Temperature and Water Potential on Mycelial Growth of Neocosmospora solani and Fusarium spp. Causing Dry Root Rot of Citrus. Curr Microbiol 2021; 78:3092-3103. [PMID: 34170379 DOI: 10.1007/s00284-021-02570-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Accepted: 06/09/2021] [Indexed: 11/29/2022]
Abstract
This study aimed at evaluating the effect of environmental factors temperature and water potential (Ψw) on the growth of Neocosmospora (Fusarium) solani and three Fusarium species (F. oxysporum, F. equiseti and F. brachygibbosum) associated with citrus dry root rot and to determine the optimum and marginal rate for their growth. The effects of incubation temperature (5-40 °C), water potentials (Ψw) (- 15.54; - 0.67 MPa) (0.89-0.995 aw) and their interaction (5-30 °C) was evaluated on the in vitro radial growth rates of Fusarium spp. and on their lag phase. Secondary models were used to model the combined effect of these factors on radial growth rate. The results underlined a highly significant effects (P < 0.001) of Ψw and temperature and their interactions on radial growth rates and lag phases (λ). The Four studied species were shown tolerant to a temperature of 35 °C with an optimum mycelial growth at 30 for N. solani and F. oxysporum and at 25 °C for F. equiseti and F. brachygibbosum. However, no growth was observed at both temperatures 5 and 40 °C and at Ψw of - 9.68 MPa (0.93 aw). The optimum water potential for growth was ≥- 2.69 MPA (>0.98 aw). The results from the polynomial model and response surface showing good agreement between observed and predicted values. The external validation on citrus fruit indicated slight differences between predicted and observed values of radial growth. The results of this study will be beneficial for understanding the ecological knowledge of these species and thereby limited preventively their occurrence.
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Affiliation(s)
- S Ezrari
- Phytopathology Unit, Department of Plant Protection, Ecole Nationale d'Agriculture de Meknès, BPS 40, Meknès, Morocco.,Laboratory of Functional Ecology and Environmental Engineering, Department of Biology, Sidi Mohamed Ben Abdellah University, Route d'Imouzzer, PoBox 2202, Fez, Morocco
| | - N Radouane
- Phytopathology Unit, Department of Plant Protection, Ecole Nationale d'Agriculture de Meknès, BPS 40, Meknès, Morocco.,Laboratory of Functional Ecology and Environmental Engineering, Department of Biology, Sidi Mohamed Ben Abdellah University, Route d'Imouzzer, PoBox 2202, Fez, Morocco
| | - A Tahiri
- Phytopathology Unit, Department of Plant Protection, Ecole Nationale d'Agriculture de Meknès, BPS 40, Meknès, Morocco
| | - S Amiri
- Phytopathology Unit, Department of Plant Protection, Ecole Nationale d'Agriculture de Meknès, BPS 40, Meknès, Morocco
| | - A Lazraq
- Laboratory of Functional Ecology and Environmental Engineering, Department of Biology, Sidi Mohamed Ben Abdellah University, Route d'Imouzzer, PoBox 2202, Fez, Morocco
| | - R Lahlali
- Phytopathology Unit, Department of Plant Protection, Ecole Nationale d'Agriculture de Meknès, BPS 40, Meknès, Morocco.
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Amiri S, Behnezhad S. Smoking and disability pension: a systematic review and meta-analysis. Public Health 2020; 186:297-303. [PMID: 32882482 DOI: 10.1016/j.puhe.2020.04.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Revised: 04/03/2020] [Accepted: 04/14/2020] [Indexed: 01/09/2023]
Abstract
OBJECTIVES Smoking has negative consequences on occupational health. The current meta-analysis was conducted with the aim to pool the studies about smoking and increased disability pension. STUDY DESIGN Systematic review and meta-analysis. METHODS Articles were found in the scientific literature using keywords, and searching was limited to prospective cohort studies that had been published before August 2018. Based on the inclusion and exclusion criteria, 23 prospective cohort studies were selected. The analyses were carried out on the basis of the random-effects method. Subgroup analysis was also carried out. Finally, the bias of publication was examined using Begg's test, the Egger test, the trim-and-fill method, and the funnel plot. RESULTS Twenty-three studies were included. The results showed a positive association between smoking and disability pension, with a risk ratio (RR) of 1.41 and 95% confidence interval (95% CI) of 1.30-1.53 (P < 0.001). In men, the RR was equal to 1.48 and 95% CI was equal to 1.30-1.68 (P < 0.001). In women, the RR was equal to 1.23 and 95% CI was equal to 1.09-1.37 (P = 0.001). In current smokers, the RR was equal to 1.41 and 95% CI was equal to 1.26-1.57 (P < 0.001). In former smokers, the RR was equal to 1.16 and 95% CI was equal to 1.05-1.29 (P = 0.003). Qualitative evaluation showed that the studies had a low level of selection bias, data collection bias, and withdrawal and dropout bias. CONCLUSIONS Smoking is a risk factor for increasing disability pension, and men are at higher risk of disability pension. In addition, both current and former smokers are in high risk of disability pension. Overall, it can be concluded that smoking is a risk factor for occupational health.
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Affiliation(s)
- S Amiri
- Behavioral Sciences Research Center, Lifestyle Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran.
| | - S Behnezhad
- Department of Psychology, Kharazmi University, Tehran, Iran
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Amiri S, Behnezhad S. Association between job strain and sick leave: a systematic review and meta-analysis of prospective cohort studies. Public Health 2020; 185:235-242. [PMID: 32682182 DOI: 10.1016/j.puhe.2020.05.023] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2020] [Revised: 04/30/2020] [Accepted: 05/08/2020] [Indexed: 12/14/2022]
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Arbabi M, Amiri S, Badragheh F, Mirbagheri MM, Asadi-Pooya AA. 22 Whole-brain functional connectivity based on the graph theory analysiisn Psychogenic Non-Epileptic Seizures (PNES). J Neurol Neurosurg Psychiatry 2020. [DOI: 10.1136/jnnp-2020-bnpa.39] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
ObjectiveDespite being the subject of many studies over the past two decades, mechanisms underlying psychogenic non-epileptic seizures (PNES) are still poorly understood. We tried to address this issue by utilizing brain functional connectivity analysis to identify brain regions with abnormal activities in patients with PNES. In a case-control study, we performed graph based network analysis, a robust technique that determines the organization of brain connectivity and characterizes topological properties of the brain networks.MethodsTwelve individuals with PNES and twenty-one healthy control subjects were examined. Resting state functional magnetic resonance imaging (rsfMRI) was acquired. All subjects were asked to keep their eyes open during the scanning process. The rsfMRI analysis consisted of pre-processing, extracting the functional connectivity matrix (FCM) based on the AAL atlas, threshold for binary FCM, constructing a graph network from FCM and extracting graph features, and finally statistical analysis. For all cortical and subcortical regions of the AAL atlas, we calculated measures of ‘degree,’ which is one of the features of the graph theory. Results: Our results revealed that, as compared to the healthy control subjects, patients with PNES had a significantly lower degree in some brain regions including their left and right insula (INS), right Putamen (PUT), left and right Supramarginal gyrus (SMG), right Middle occipital gyrus (MOG), and left and right Rolandic operculum (ROL). In contrast, degree was significantly greater in two regions [i.e., right Caudate (CAU) and left Inferior frontal gyrus orbital part (ORBinf)] in patients with PNES compared to that in controls.ConclusionOur findings suggest that functional connectivity of several major brain regions are different in patients with PNES compared with that in healthy individuals. While there is hypoactivity in regions important in perception, motor control, self- awareness, and cognitive functioning (e.g., insula) and also movement regulation (e.g., putamen), there is hyperactivity in areas involved in feedback processing (i.e., using information from past experiences to influence future actions and decisions) (e.g., caudate) in patients with PNES. The observation that individuals with PNES suffer from a wide range of abnormal activities in functional connectivity of their brain networks is consistent with the fact that PNES occur in a heterogeneous patient population; no single mechanism or contributing factor could explain PNES in all patients.
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Amiri S, Jafari-Sabet M, Keyhanfar F, Falak R, Shabani M, Rezayof A. Hippocampal and prefrontal cortical NMDA receptors mediate the interactive effects of olanzapine and lithium in memory retention in rats: the involvement of CAMKII-CREB signaling pathways. Psychopharmacology (Berl) 2020; 237:1383-1396. [PMID: 31984447 DOI: 10.1007/s00213-020-05465-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Accepted: 01/16/2020] [Indexed: 12/20/2022]
Abstract
RATIONALE Treatment of bipolar disorder (BPD) with lithium and olanzapine concurrent administration is a major medicine issue with the elusive neurobiological mechanisms underlying the cognitive function. OBJECTIVE To clarify the precise mechanisms involved, the possible role of the hippocampus (HPC) and prefrontal cortical (PFC) NMDA receptors and CAMKII-CREB signaling pathway in the interactive effects of lithium and olanzapine in memory consolidation was evaluated. The dorsal hippocampal CA1 regions of adult male Wistar rats were bilaterally cannulated and a step-through inhibitory avoidance apparatus was used to assess memory consolidation. The changes in p-CAMKII/CAMKII and p-CREB/CREB ratio in the HPC and the PFC were measured by Western blot analysis. RESULTS Post-training administration of lithium (20, 30, and 40 mg/kg, i.p.) dose-dependently decreased memory consolidation whereas post-training administration olanzapine (2 and 5 mg/kg, i.p.) increased memory consolidation. Post-training administration of certain doses of olanzapine (1, 2, and 5 mg/kg, i.p.) dose-dependently improved lithium-induced memory impairment. Post-training administration of ineffective doses of the NMDA (10-5 and 10-4 μg/rat, intra-CA1) plus an ineffective dose of olanzapine (1 mg/kg, i.p.) dose-dependently improved the lithium-induced memory impairment. Post-training microinjection of ineffective doses of the NMDA (10-5 and 10-4 μg/rat, intra-CA1) dose-dependently potentiated the memory improvement induced by olanzapine (1 mg/kg, i.p.) on lithium-induced memory impairment which was associated with the enhancement of the levels of p-CAMKII and p-CREB in the HPC and the PFC. Post-training microinjection of ineffective doses of the noncompetitive NMDA receptor antagonist, MK-801 (0.0625 and 0.0125 μg/rat, intra-CA1), dose-dependently decreased the memory improvement induced by olanzapine (5 mg/kg, i.p.) on lithium-induced memory impairment which was related to the reduced levels of HPC and PFC CAMKII-CREB. CONCLUSION The results strongly revealed that there is a functional interaction among lithium and olanzapine through the HPC and the PFC NMDA receptor mechanism in memory consolidation which is mediated with the CAMKII-CREB signaling pathway.
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Affiliation(s)
- Shiva Amiri
- Department of Pharmacology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Majid Jafari-Sabet
- Department of Pharmacology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran.
- Razi Drug Research Center, School of Medicine, Iran University of Medical Sciences, Tehran, Iran.
| | - Fariborz Keyhanfar
- Department of Pharmacology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Reza Falak
- Immunology Research Center, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Mohammad Shabani
- Kerman Neuroscience Research Center, Neuropharmacology Institute, Kerman University of Medical Sciences, Kerman, Iran
| | - Ameneh Rezayof
- Department of Animal Biology, School of Biology and Center of Excellence in Phylogeny of Living Organisms, College of Science, University of Tehran, Tehran, Iran
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Amiri S, Behnezhad S. Is job strain a risk factor for musculoskeletal pain? A systematic review and meta-analysis of 21 longitudinal studies. Public Health 2020; 181:158-167. [PMID: 32059156 DOI: 10.1016/j.puhe.2019.11.023] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Revised: 11/10/2019] [Accepted: 11/27/2019] [Indexed: 02/08/2023]
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Amiri S, Behnezhad S. Job strain and mortality ratio: a systematic review and meta-analysis of cohort studies. Public Health 2020; 181:24-33. [PMID: 31927337 DOI: 10.1016/j.puhe.2019.10.030] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Revised: 10/12/2019] [Accepted: 10/30/2019] [Indexed: 12/13/2022]
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Amiri S, Arbabi M, Kazemi K, Parvaresh-Rizi M, Mirbagheri MM. Resting-State Functional Connectivity in Popular Targets for Deep Brain Stimulation in the Treatment of Major Depression: An Application of a Graph Theory. Annu Int Conf IEEE Eng Med Biol Soc 2020; 2019:4334-4337. [PMID: 31946827 DOI: 10.1109/embc.2019.8856413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
We examined the functional connectivity of subcallosal cingulate gyrus (SCG), nucleus accumbens (NAc), and ventral caudate (VCa), the main target areas for the treatment of major depression disorder (MDD), using deep brain stimulation (DBS). MDD is one of the most common diseases in the world, and approximately 30% of MDD patients do not respond to common therapies, including psychotherapy and antidepressant medications. Alternatively, DBS has been recently used to treat MDD. Resting state fMRI was obtained from seventeen healthy subjects and seven MDD patients. The functional connectivity network of the brain was constructed for all subjects and measured by the `degree' value for each SCG, NAc, and VCa regions using the graph theory analysis. The results show that the degree values of VCa and the left SCG are higher in the MDD group than the healthy group. Furthermore, the patterns of the degree values were different for the right and left hemispheres in MDD patients. Our findings suggest that degree values and their patterns have a potential to be used as diagnosis tools to detect the brain areas with abnormal functional connectivity.
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Rasooli AH, Ashtiyani M, Birgani PM, Amiri S, Mirmohammadi P, Deevband MR. MRI Segmentation using Fuzzy C-Means and Radial Basis Function Neural Networks. CURR SCI INDIA 2018. [DOI: 10.18520/cs/v115/i6/1091-1097] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Marzbani H, Parvin S, Amiri S, Lotfian M, Kharazi MR, Azizi S, Mirbagheri MM. The correlation between transcranial magnetic stimulation parameters and neuromuscular properties in children with cerebral palsy. Annu Int Conf IEEE Eng Med Biol Soc 2017; 2016:5473-5476. [PMID: 28269496 DOI: 10.1109/embc.2016.7591965] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
We studied the correlation between corticospinal signaling and neuromuscular properties in children with Cerebral Palsy (CP). Corticospinal signaling was evaluated using Transcranial Magnetic Stimulation (TMS). Neuromuscular properties were quantified using Hoffmann reflex (H-reflex), sonoelastography, clinical measurements, and isokinetic measures. In particular, we determined the relationship between the TMS parameters of the ankle joint and the neuromuscular features of ankle extensors and flexors as well as popular clinical measures of gait speed, endurance, balance and mobility. Seventeen CP patients and twelve healthy control subjects were evaluated. Our findings showed that the motor evoked potential (MEP) latency of TMS was significantly longer in CP than in healthy subjects. The MEP-latency was significantly correlated with the H-reflex response (r=0.71, p-value=0.04) and isokinetic features; i.e. max acceleration extension time (r=0.5, p-value=0.005), and max flexion time in the cycle (r=0.5, p-value =0.002). No significant correlation was observed between MEP-latency and clinical measurements of gait and sonoelastography of ankle muscles. The results suggest that the changes in corticospinal signaling could contribute to muscle weakness and hyperexcitability of reflexes observed in children with CP.
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Amiri S, Mehrnia M, Roudsari FP. Enhancing purification efficiency of affinity functionalized composite agarose micro beads using Fe3O4 nanoparticles. J Chromatogr B Analyt Technol Biomed Life Sci 2017; 1041-1042:27-36. [DOI: 10.1016/j.jchromb.2016.11.035] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2016] [Revised: 11/12/2016] [Accepted: 11/23/2016] [Indexed: 11/28/2022]
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Ashtari N, Jiao X, Rahimi-Balaei M, Amiri S, E. Mehr S, Yeganeh B, Marzban H. Lysosomal Acid Phosphatase Biosynthesis and Dysfunction: A Mini Review Focused on Lysosomal Enzyme Dysfunction in Brain. Curr Mol Med 2016; 16:439-46. [DOI: 10.2174/1566524016666160429115834] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2015] [Revised: 02/25/2016] [Accepted: 04/02/2016] [Indexed: 11/22/2022]
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Haj-Mirzaian A, Amiri S, Kordjazy N, Momeny M, Razmi A, Rahimi-Balaei M, Amini-Khoei H, Haj-Mirzaian A, Marzban H, Mehr S, Ghaffari S, Dehpour A. Lithium attenuated the depressant and anxiogenic effect of juvenile social stress through mitigating the negative impact of interlukin-1β and nitric oxide on hypothalamic–pituitary–adrenal axis function. Neuroscience 2016; 315:271-85. [DOI: 10.1016/j.neuroscience.2015.12.024] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2015] [Revised: 11/29/2015] [Accepted: 12/14/2015] [Indexed: 10/22/2022]
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Esfandiari H, Amiri S, Lichti DD, Anglin C. A fast, accurate and closed-form method for pose recognition of an intramedullary nail using a tracked C-arm. Int J Comput Assist Radiol Surg 2015; 11:621-33. [PMID: 26450111 DOI: 10.1007/s11548-015-1294-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2014] [Accepted: 09/09/2015] [Indexed: 10/23/2022]
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Osterhoff G, Amiri S, Unno F, Dodd A, Guy P, O'Brien PJ, Lefaivre KA. The "Down the PC" view - A new tool to assess screw positioning in the posterior column of the acetabulum. Injury 2015; 46:1625-8. [PMID: 25990076 DOI: 10.1016/j.injury.2015.04.042] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Accepted: 04/25/2015] [Indexed: 02/02/2023]
Abstract
INTRODUCTION Minimal-invasive placement of screws into the posterior column of the acetabulum (PC) is challenging. Due to the saddle-shaped curvature of the medial cortical border of the PC, the standard fluoroscopic views of the pelvis cannot provide the desired safety during screw insertion. The aim of this study was to define a view tangentially to the medial cortex of the PC and to evaluate its accuracy and inter-observer reproducibility. METHODS Radio-dense markers on the medial cortex of the PC along the axis of a PC screw were brought in line and landmarks of the new "Down the PC" view were determined. Kirschner wires were placed into the PC of a pelvis composite model and five pelvic cadaver specimens in a total of 34 different correct and incorrect positions. Based on either only the "Down the PC" view, only the standard views, or a combination of both, three fellowship-trained orthopaedic surgeons had to decide if the inserted wires were in bone in the posterior column or had exited cortex, and if they penetrated the acetabulum. Sensitivity, specificity, and the intra-class correlation coefficient were calculated. RESULTS A view using three radiographic landmarks (pelvic brim, medial cortical wall of the body of the ischium, ischial spine) was found. Sensitivity and specificity to detect perforation out of the bone were 1.00 and 0.97 for the "Down the PC" view, 0.46 and 0.97 if only the standard views were used, and 1.00 and 0.95 for a combination of both. Sensitivity and specificity to detect intra-articular wire placement were 1.00 and 0.96 for the "Down the PC" view, 0.72 and 0.95 if only the standard views were used, and 0.94 and 0.99 for a combination of both. Inter-observer agreement using only the "Down the PC" view was excellent with an ICC of 0.92 for perforation and ICC of 0.82 for intra-articular wire placement. CONCLUSIONS The "Down the PC" view is a useful addendum in the orthopaedic trauma surgeon's tool box. Using simple landmarks, it is easily to reproduce and thereby shows excellent accuracy and inter-observer agreement in order to detect medial perforation or intra-articular implant position.
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Affiliation(s)
- G Osterhoff
- Department of Orthopaedics, Division of Orthopaedic Trauma, University of British Columbia, 3114 - 910 West 10th Avenue, Vancouver, British Columbia V5Z 1M9, Canada.
| | - S Amiri
- Department of Orthopaedics, Division of Orthopaedic Trauma, University of British Columbia, 3114 - 910 West 10th Avenue, Vancouver, British Columbia V5Z 1M9, Canada
| | - F Unno
- Department of Orthopaedics, Division of Orthopaedic Trauma, University of British Columbia, 3114 - 910 West 10th Avenue, Vancouver, British Columbia V5Z 1M9, Canada
| | - A Dodd
- Department of Orthopaedics, Division of Orthopaedic Trauma, University of British Columbia, 3114 - 910 West 10th Avenue, Vancouver, British Columbia V5Z 1M9, Canada
| | - P Guy
- Department of Orthopaedics, Division of Orthopaedic Trauma, University of British Columbia, 3114 - 910 West 10th Avenue, Vancouver, British Columbia V5Z 1M9, Canada
| | - P J O'Brien
- Department of Orthopaedics, Division of Orthopaedic Trauma, University of British Columbia, 3114 - 910 West 10th Avenue, Vancouver, British Columbia V5Z 1M9, Canada
| | - K A Lefaivre
- Department of Orthopaedics, Division of Orthopaedic Trauma, University of British Columbia, 3114 - 910 West 10th Avenue, Vancouver, British Columbia V5Z 1M9, Canada
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Gonnermann J, Amiri S, Klamann M, Maier AKB, Joussen AM, Rieck PW, Torun N, Bertelmann E. [Endothelial cell loss after retropupillary iris-claw intraocular lens implantation]. Klin Monbl Augenheilkd 2014; 231:784-7. [PMID: 24992236 DOI: 10.1055/s-0034-1368453] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
BACKGROUND The aim of this study was to evaluate the indication, visual and refractive outcome, endothelial cell loss and complication rate after implantation of a posterior iris-claw aphakic intraocular lens (IOL). PATIENTS AND METHODS This retrospective study comprised 62 eyes of 56 patients without adequate capsular support undergoing posterior iris-claw aphakic IOL implantation (Verisyse™/Artisan®) between 2006 and 2012. Mean follow-up was 34 months (range from 13 to 78 months). RESULTS The IOLs were inserted during primary lens surgery in 11 phakic eyes (17.8 %), during an IOL exchange procedure for dislocated posterior chamber IOLs in 34 eyes (54.8 %), and as a secondary procedure in 17 aphakic eyes (27.4 %). The final best spectacle-corrected visual acuity (BSCVA) in logMAR (mean 0.24 ± 0.45) improved significantly (p < 0.001) compared to the preoperative BSCVA (mean 0.61 ± 0.65). The mean spherical equivalent improved from preoperative 7,25 ± 5,04 diopters (D) (range - 10.25 to + 16.0 D) to - 0.21 ± 1.01 D (range - 4.0 to 3.0 D) postoperatively. Mean central endothelial cell density was 1844 ± 690 cells/mm(2) preoperatively. After surgery mean endothelial cell density decreased statistically not significant with a loss of 5.5 % to 1743 ± 721 cells/mm(2) (p > 0.05) at last follow-up visit. Complications included cystoid macular oedema in 4 eyes (6.4 %), early postoperative hypotony in 2 eyes (3.2 %), pupil ovalisation in 2 eyes (3.2 %), traumatic iris-claw IOL disenclavation in 2 eyes (3.2 %) and spontaneous IOL disenclavation in one eye (1.6 %). CONCLUSIONS Retropupillar iris-claw IOL provides good visual and refractive outcomes with a low endothelial cell loss and can be used for a wide range of indications in eyes without adequate capsular support.
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Affiliation(s)
- J Gonnermann
- Klinik für Augenheilkunde, Campus Virchow Klinikum, Charité - Universitätsmedizin Berlin
| | - S Amiri
- Klinik für Augenheilkunde, Campus Virchow Klinikum, Charité - Universitätsmedizin Berlin
| | - M Klamann
- Klinik für Augenheilkunde, Campus Virchow Klinikum, Charité - Universitätsmedizin Berlin
| | - A-K B Maier
- Klinik für Augenheilkunde, Campus Virchow Klinikum, Charité - Universitätsmedizin Berlin
| | - A M Joussen
- Klinik für Augenheilkunde, Campus Virchow Klinikum, Charité - Universitätsmedizin Berlin
| | - P W Rieck
- Klinik für Augenheilkunde, Campus Virchow Klinikum, Charité - Universitätsmedizin Berlin
| | - N Torun
- Klinik für Augenheilkunde, Campus Virchow Klinikum, Charité - Universitätsmedizin Berlin
| | - E Bertelmann
- Klinik für Augenheilkunde, Campus Virchow Klinikum, Charité - Universitätsmedizin Berlin
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Amiri S, Movahedi MM, Kazemi K, Parsaei H. An Automated MR Image Segmentation System Using Multi-layer Perceptron Neural Network. J Biomed Phys Eng 2013; 3:115-122. [PMID: 25505757 PMCID: PMC4204503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2013] [Indexed: 06/04/2023]
Abstract
BACKGROUND Brain tissue segmentation for delineation of 3D anatomical structures from magnetic resonance (MR) images can be used for neuro-degenerative disorders, characterizing morphological differences between subjects based on volumetric analysis of gray matter (GM), white matter (WM) and cerebrospinal fluid (CSF), but only if the obtained segmentation results are correct. Due to image artifacts such as noise, low contrast and intensity non-uniformity, there are some classification errors in the results of image segmentation. OBJECTIVE An automated algorithm based on multi-layer perceptron neural networks (MLPNN) is presented for segmenting MR images. The system is to identify two tissues of WM and GM in human brain 2D structural MR images. A given 2D image is processed to enhance image intensity and to remove extra cerebral tissue. Thereafter, each pixel of the image under study is represented using 13 features (8 statistical and 5 non- statistical features) and is classified using a MLPNN into one of the three classes WM and GM or unknown. RESULTS The developed MR image segmentation algorithm was evaluated using 20 real images. Training using only one image, the system showed robust performance when tested using the remaining 19 images. The average Jaccard similarity index and Dice similarity metric for the GM and WM tissues were estimated to be 75.7 %, 86.0% for GM, and 67.8% and 80.7%for WM, respectively. CONCLUSION The obtained performances are encouraging and show that the presented method may assist with segmentation of 2D MR images especially where categorizing WM and GM is of interest.
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Affiliation(s)
- S Amiri
- Department of Medical Physics and Biomedical Engineering, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - M M Movahedi
- Department of Medical Physics and Biomedical Engineering, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - K Kazemi
- Department of Electrical and Electronics Engineering, Shiraz University of Technology, Shiraz, Iran
| | - H Parsaei
- Department of Medical Physics and Biomedical Engineering, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
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Sharma GB, Saevarsson SK, Amiri S, Montgomery S, Ramm H, Lichti DD, Lieck R, Zachow S, Anglin C. Radiological method for measuring patellofemoral tracking and tibiofemoral kinematics before and after total knee replacement. Bone Joint Res 2012; 1:263-71. [PMID: 23610657 PMCID: PMC3626255 DOI: 10.1302/2046-3758.110.2000117] [Citation(s) in RCA: 18] [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] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/26/2012] [Accepted: 09/07/2012] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVES Numerous complications following total knee replacement (TKR) relate to the patellofemoral (PF) joint, including pain and patellar maltracking, yet the options for in vivo imaging of the PF joint are limited, especially after TKR. We propose a novel sequential biplane radiological method that permits accurate tracking of the PF and tibiofemoral (TF) joints throughout the range of movement under weightbearing, and test it in knees pre- and post-arthroplasty. METHODS A total of three knees with end-stage osteoarthritis and three knees that had undergone TKR at more than one year's follow-up were investigated. In each knee, sequential biplane radiological images were acquired from the sagittal direction (i.e. horizontal X-ray source and 10° below horizontal) for a sequence of eight flexion angles. Three-dimensional implant or bone models were matched to the biplane images to compute the six degrees of freedom of PF tracking and TF kinematics, and other clinical measures. RESULTS The mean and standard deviation for the six degrees of freedom of PF tracking and TF kinematics were computed. TF and PF kinematics were highly accurate (< 0.9 mm, < 0.6°) and repeatable. CONCLUSIONS The developed method permitted measuring of in vivo PF tracking and TF kinematics before and after TKR throughout the range of movement. This method could be a useful tool for investigating differences between cohorts of patients (e.g., with and without pain) impacting clinical decision-making regarding surgical technique, revision surgery or implant design.
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Affiliation(s)
- G B Sharma
- University of Calgary, 3280 Hospital Drive NW, Calgary, Alberta T2N 4Z6, Canada
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Amiri S, Shokrollahi H. The role of cobalt ferrite magnetic nanoparticles in medical science. Mater Sci Eng C Mater Biol Appl 2012; 33:1-8. [PMID: 25428034 DOI: 10.1016/j.msec.2012.09.003] [Citation(s) in RCA: 122] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2012] [Revised: 07/17/2012] [Accepted: 09/03/2012] [Indexed: 11/27/2022]
Abstract
The nanotechnology industry is rapidly growing and promises that the substantial changes that will have significant economic and scientific impacts be applicable to a wide range of areas, such as aerospace engineering, nano-electronics, environmental remediation and medical healthcare. In this area, cobalt ferrite nanoparticles have been regarded as one of the competitive candidates because of their suitable physical, chemical and magnetic properties like the high anisotropy constant, high coercivity and high Curie temperature, moderate saturation magnetization and ease of synthesis. This paper introduces the magnetic properties, synthesis methods and some medical applications, including the hyperthermia, magnetic resonance imaging (MRI), magnetic separation and drug delivery of cobalt ferrite nanoparticles.
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Affiliation(s)
- S Amiri
- Electroceramics Group, Department of Materials Science and Engineering, Shiraz University of Technology, Shiraz, Iran
| | - H Shokrollahi
- Electroceramics Group, Department of Materials Science and Engineering, Shiraz University of Technology, Shiraz, Iran.
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Amir Ali Akbari S, Montazeri S, Torabi F, Amiri S, Soleimani F, Alavi Majd H. Correlation between anthropometric indices at birth and developmental delay in children aged 4-60 months in Isfahan, Iran. Int J Gen Med 2012; 5:683-7. [PMID: 22973115 PMCID: PMC3430117 DOI: 10.2147/ijgm.s34806] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Background Advances in medical knowledge and treatment modalities have resulted in an increased survival rate for high-risk infants. This increased number of survivors enables study of the future development of these children. Other than infection and trauma, developmental and behavioral problems are the most common medical problems among such children. This study sought correlations between anthropometric indices at birth and developmental delay in children aged 4–60 months who visited health service centers affiliated with the Isfahan University of Medical Sciences in 2010. Methods In this descriptive, correlational study, 401 children aged 4–60 months and visiting health service centers were selected using a multistage method. Anthropometric indices at birth were collected from their health care records, and developmental status was measured using the Ages and Stages Questionnaire, the validity (0.84) and reliability (0.94) of which were obtained from a previous study. Results The mean age of the children in the normal group was 17.33 ± 13.18 months and that in the developmental delay group was 29.92 ± 19.19 months. Most children in the normal group were female (56%) and in the developmental delay group were male (55.2%). No correlation was found between height and head circumference at birth and developmental delay. However, the birth weight of children with developmental delay was four times lower than that of children with normal development (P = 0.004, odds ratio 4). Conclusion Birth weight and male gender were factors that strongly correlated with developmental delay in this study.
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Affiliation(s)
- S Amir Ali Akbari
- Department of Midwifery, Faculty of Nursing and Midwifery, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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Ho K, Saevarsson S, Ramm H, Lieck R, Zachow S, Sharma G, Rex E, Amiri S, Wu B, Leumann A, Anglin C. Computed tomography analysis of knee pose and geometry before and after total knee arthroplasty. J Biomech 2012; 45:2215-21. [DOI: 10.1016/j.jbiomech.2012.06.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2012] [Revised: 05/14/2012] [Accepted: 06/14/2012] [Indexed: 10/28/2022]
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Radi M, Niakousari M, Amiri S. Physicochemical, Textural and Sensory Properties of Low-Fat Yogurt Produced by Using Modified Wheat Starch as a Fat Replacer. ACTA ACUST UNITED AC 2009. [DOI: 10.3923/jas.2009.2194.2197] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Abstract
Fifty patients with endoscopically proven pyloric-prepyloric ulcers (PU/PPU) and 50 with duodenal ulcers (DU) completed a six-week double-blind clinical trial initially comprising 124 patients. The antacid-treated patients received 10 ml of an antacid suspension seven times a day (buffering 367.5 mmol acid). Healing rate after three weeks of treatment was 74% in the antacid and 42% in the placebo group (p less than 0.01). After six weeks the corresponding figures were 96 and 68% (p less than 0.001). Regarding the PU/PPU and DU subgroups we found significant differences compared to placebo in the PU/PPU group only. Antacids caused a significantly faster and more perceptible pain relief than placebo. We found no significant correlation between ulcer healing and smoking habits. Regression analyses showed that, besides antacids, ulcer size and peak acid output influenced the healing rate significantly.
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Amiri S, Movahedin M, Mowla SJ, Hajebrahimi Z, Tavallaei M. Differential gene expression and alternative splicing of survivin following mouse sciatic nerve injury. Spinal Cord 2009; 47:739-44. [DOI: 10.1038/sc.2009.26] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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Amiri M, Ebrahimiza A, Amiri S, Radi M, Niakousari M. Comparative Evaluation of Physicochemical Properties of Corn Flours Through Different Water Qualities and Irrigation Methods. ACTA ACUST UNITED AC 2009. [DOI: 10.3923/jas.2009.938.943] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Amiri S, Shimomura M, Vijayan R, Nishiwaki H, Akamatsu M, Matsuda K, Jones AK, Sansom MSP, Biggin PC, Sattelle DB. A Role for Leu118 of Loop E in Agonist Binding to the α7 Nicotinic Acetylcholine Receptor. Mol Pharmacol 2008; 73:1659-67. [DOI: 10.1124/mol.107.041590] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Amiri S, Ramezani R, Aminlari M. Antibacterial activity of dextran-conjugated lysozyme against Escherichia coli and Staphylococcus aureus in cheese curd. J Food Prot 2008; 71:411-5. [PMID: 18326197 DOI: 10.4315/0362-028x-71.2.411] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The purposes of this research were to glycosylate lysozyme with dextran under Maillard reaction conditions and assess the antimicrobial characteristics of the lysozyme-dextran conjugate in a culture medium and cheese curd. Solutions containing lysozyme and dextran were incubated at 60 degrees C and at 79% relative humidity. Gel permeation chromatography and sodium dodecyl sulfate-polyacrylamide gel electrophoresis were used to follow the glycosylation process. Under optimum conditions 3.7 mol of dextran were coupled to 1 mol of lysozyme. Lytic activity of the conjugate against the cell wall of Micrococcus luteus was about 62% of that of native lysozyme. Evaluation of the lysozyme-dextran conjugate against test microorganisms (Staphylococcus aureus and Escherichia coli) in culture media indicated a progressive increase in antimicrobial activity, with an increase in enzyme-conjugate concentration. The lysozyme-dextran conjugate was also effective against E. coli in a natural food system, as it reduced the bacterial count by 3 log in cheese curd after 40 days of storage. Unlike E. coli, the antimicrobial action of lysozyme against S. aureus was not improved by conjugation with dextran in both in vitro and in vivo tests. Antimicrobial activity of the lysozyme-dextran conjugate against gram-negative bacteria is probably related to the remaining lytic activity as well as the excellent surfactant properties of the lysozyme-dextran conjugate. These results might increase the applicability of lysozyme as a natural antimicrobial ingredient in different food products.
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Affiliation(s)
- S Amiri
- Department of Food Science and Technology, School of Agriculture, Shiraz University, Shiraz, 71345, Iran
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Amiri S, Cooke D, Kim IY, Wyss U. Mechanics of the passive knee joint. Part 2: interaction between the ligaments and the articular surfaces in guiding the joint motion. Proc Inst Mech Eng H 2008; 221:821-32. [PMID: 18161242 DOI: 10.1243/09544119jeim181] [Citation(s) in RCA: 36] [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: 11/18/2022]
Abstract
The aim of this study was to examine how the interaction between ligament tensions and contact forces guides the knee joint through its specific pattern of passive motion. A computer model was built based on cadaver data. The passive motion and the ligament lengthening and force patterns predicted by the model were verified with data from the literature. The contribution of each ligament and contact force was measured in terms of the rotational moment that it produced about the tibial medial plateau and the anterior-posterior (AP) force that it exerted on the tibia. The high tension of the anterior cruciate ligament (ACL) and the geometric constraints of the anterior horns of the menisci were found to be key features that stabilized the knee at full extension. The mutual effect of the cruciates was found as the reason for the screw-home mechanism at early flexion. Past 300, the AP component of contact force on the convex geometry of the lateral tibial plateau and tension of the lateral collateral ligament (LCL) were identified as elements that control the joint motion. From 60 degrees to 90 degrees, reduction in the tension of the ACL was determined as a reason for continuation of the tibial anterior translation. From 90 degrees to 120 degrees, increase in the tension of the posterior cruciate ligament and the AP component of the contact force on the convex geometry of the lateral tibial plateau pushed the tibia more anteriorly. This anterior translation was limited by the constraining effects of the ACL tension and the AP component of the contact force on the medial meniscus. The important guiding role observed for the LCL suggests that it should not be overlooked in knee models.
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Affiliation(s)
- S Amiri
- Department of Mechanical and Materials Engineering, Queen's University, 130 Stuart St, Kingston, Ontario, K7L 3N6, Canada.
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Amiri S, Sansom MSP, Biggin PC. Molecular dynamics studies of AChBP with nicotine and carbamylcholine: the role of water in the binding pocket. Protein Eng Des Sel 2007; 20:353-9. [PMID: 17595341 DOI: 10.1093/protein/gzm029] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The acetylcholine-binding protein (AChBP) is homologous to the ligand-binding domain of the nicotinic acetylcholine receptor (nAChR) and other members of the Cys-loop family of neurotransmitter receptors. The high-resolution X-ray structures of AChBP mean it has been used as a model from which to understand agonist and antagonist binding to nAChRs. We present here a molecular dynamics (MD) study of AChBP with nicotine and carbamylcholine bound. Our results suggest that the ligand imposes rigidity on the binding pocket residues. The simulations also suggest that the protein undergoes breathing motions with respect to the five-fold axis, a motion that has been postulated to be related to gating in the nAChR. We analyzed the behaviour of the water molecules in and around the binding site and found that they occupied five distinct sites within the binding pocket. Water occupied these sites in the absence of ligand, but the presence of ligand increased the probability that a water molecule would be found in these sites. Finally, we demonstrate how the positions of these waters might be used in the design of new ligands by comparing the positions of these sites with other recent structures.
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Affiliation(s)
- Shiva Amiri
- Structural Bioinformatics and Computational Biochemistry, Department of Biochemistry, The University of Oxford, Oxford, UK
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Amiri S, Cooke D, Kim IY, Wyss U. Mechanics of the passive knee joint. Part 1: The role of the tibial articular surfaces in guiding the passive motion. Proc Inst Mech Eng H 2007; 220:813-22. [PMID: 17236515 DOI: 10.1243/09544119jeim180] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [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: 11/18/2022]
Abstract
The motion of the unloaded knee is associated with tibial internal rotation and femoral posterior translation. Although it is known that the passive motion is the result of the interaction between the articular surfaces and the ligaments, the mechanism through which the particular pattern of motion is guided is not completely understood. The goal of this study was to focus on the tibial geometry and to identify the roles that its geometric features have in guiding the passive knee motion. The method used in this study simplified the geometry of the tibial plateaux and the menisci into basic features that could be eliminated individually. The generated tibial geometry was implemented in a computer model to simulate the passive motion. Different parts of the geometry were eliminated individually and the comparison between the simulation results was used to identify the role that each part of the geometry had in guiding the passive motion. The medial meniscus was found as the feature that promoted the tibial internal rotation and restrained the femoral posterior translation. The lateral meniscus and the medial aspect of the tibial eminence, on the other hand, were found as the elements that confined the tibial internal rotation.
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Affiliation(s)
- S Amiri
- Department of Mechanical and Materials Engineering, Queen's University, 130 Stuart St, Kingston, Ontario K7L3N6, Canada.
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Abstract
The structure of a homopentameric alpha7 nicotinic acetylcholine receptor is modelled by combining structural information from two sources: the X-ray structure of a water soluble acetylcholine binding protein from Lymnea stagnalis, and the electron microscopy derived structure of the transmembrane domain of the Torpedo nicotinic receptor. The alpha7 nicotinic receptor model is generated by simultaneously optimising: (i) chain connectivity, (ii) avoidance of stereochemically unfavourable contacts, and (iii) contact between the beta1-beta2 and M2-M3 loops that have been suggested to be involved in transmission of conformational change between the extracellular and transmembrane domains. A Gaussian network model was used to predict patterns of residue mobility in the alpha7 model. The results of these calculations suggested a flexibility gradient along the transmembrane domain, with the extracellular end of the domain more flexible that the intracellular end. Poisson-Boltzmann (PB) energy calculations and atomistic (molecular dynamics) simulations were used to estimate the free energy profile of a Na+ ion as a function of position along the axis of the pore-lining M2 helix bundle of the transmembrane domain. Both types of calculation suggested a significant energy barrier to exist in the centre of the (closed) pore, consistent with a "hydrophobic gating" model. Estimations of the PB energy profile as a function of ionic strength suggest a role of the extracellular domain in determining the cation selectivity of the alpha7 nicotinic receptor. These studies illustrate how molecular models of members of the nicotinic receptor superfamily of channels may be used to study structure-function relationships.
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Affiliation(s)
- Shiva Amiri
- Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, UK
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Cagney G, Amiri S, Premawaradena T, Lindo M, Emili A. In silico proteome analysis to facilitate proteomics experiments using mass spectrometry. Proteome Sci 2003; 1:5. [PMID: 12946274 PMCID: PMC194173 DOI: 10.1186/1477-5956-1-5] [Citation(s) in RCA: 80] [Impact Index Per Article: 3.8] [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: 04/23/2003] [Accepted: 08/13/2003] [Indexed: 11/10/2022] Open
Abstract
Proteomics experiments typically involve protein or peptide separation steps coupled to the identification of many hundreds to thousands of peptides by mass spectrometry. Development of methodology and instrumentation in this field is proceeding rapidly, and effective software is needed to link the different stages of proteomic analysis. We have developed an application, proteogest, written in Perl that generates descriptive and statistical analyses of the biophysical properties of multiple (e.g. thousands) protein sequences submitted by the user, for instance protein sequences inferred from the complete genome sequence of a model organism. The application also carries out in silico proteolytic digestion of the submitted proteomes, or subsets thereof, and the distribution of biophysical properties of the resulting peptides is presented. proteogest is customizable, the user being able to select many options, for instance the cleavage pattern of the digestion treatment or the presence of modifications to specific amino acid residues. We show how proteogest can be used to compare the proteomes and digested proteome products of model organisms, to examine the added complexity generated by modification of residues, and to facilitate the design of proteomics experiments for optimal representation of component proteins.
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Affiliation(s)
- Gerard Cagney
- Program in Proteomics and Bioinformatics, Banting and Best Department of Medical Research, University of Toronto, Toronto, Canada
- Present Address: Department of Clinical Pharmacology, Royal College of Surgeons, 123 Saint Stephen's Green, Dublin 2, Ireland
| | - Shiva Amiri
- Program in Proteomics and Bioinformatics, Banting and Best Department of Medical Research, University of Toronto, Toronto, Canada
| | - Thanuja Premawaradena
- Program in Proteomics and Bioinformatics, Banting and Best Department of Medical Research, University of Toronto, Toronto, Canada
| | - Micheal Lindo
- Program in Proteomics and Bioinformatics, Banting and Best Department of Medical Research, University of Toronto, Toronto, Canada
| | - Andrew Emili
- Program in Proteomics and Bioinformatics, Banting and Best Department of Medical Research, University of Toronto, Toronto, Canada
- Department of Molecular and Medical Genetics, University of Toronto, Toronto, Canada
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