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Garmabi M, Andishmand Z, Naderi F, Sharifnezhad A, Darrudi F, Malekzadeh R, Amini A, Gholami A. The Prevalence of Depression and Anxiety and Its Association with Sleep Quality in the First-Year Medical Science Students. Depress Res Treat 2024; 2024:7102081. [PMID: 38651016 PMCID: PMC11035008 DOI: 10.1155/2024/7102081] [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] [Figures] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Revised: 03/02/2024] [Accepted: 03/17/2024] [Indexed: 04/25/2024]
Abstract
Methods A total number of 471 freshmen students (NUMS) participated in the study, pinpointing that the data are collected in 2019 and 2020. In line with measuring depression, anxiety, and sleep quality, the Persian Beck Depression Inventory-II, Beck Anxiety Inventory, and Pittsburgh Sleep Quality Index were employed. The associations between depression and anxiety with sleep quality were assessed by using the multiple logistic regression model. All statistical analyses were conducted in STATA14, and the significant level was set at P < 0.05. Results The prevalence of depression, anxiety, and poor sleep quality in the study population was 21.4%, 31.9%, and 28%, respectively. Analytical analyses indicated that after adjusting for studied covariates, the odds of poor sleep quality in individuals with depression were 3.5 times higher compared to the counter group (P < 0.001). Moreover, the odds of poor sleep quality in individuals with anxiety were 2.1 times higher compared to the counter group (P < 0.001). Conclusion Noticeable proportion of freshmen students suffer from depression and anxiety; in line with such a critical issue, our study found that depression and anxiety had a statistical association with sleep quality in study population. From this respect, it seems that providing essential interventions and psychological counseling services could be constructive for the freshmen medical students.
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Affiliation(s)
- Maryam Garmabi
- Student Counseling Center, Neyshabur University of Medical Sciences, Neyshabur, Iran
| | - Zahra Andishmand
- Student Counseling Center, Neyshabur University of Medical Sciences, Neyshabur, Iran
| | - Fatemeh Naderi
- Student Counseling Center, Neyshabur University of Medical Sciences, Neyshabur, Iran
| | - Ahmad Sharifnezhad
- Department of Basic Sciences, School of Medicine, Neyshabur University of Medical Sciences, Neyshabur, Iran
| | - Fatemeh Darrudi
- Noncommunicable Diseases Research Center, Neyshabur University of Medical Sciences, Neyshabur, Iran
| | - Roghayeh Malekzadeh
- Noncommunicable Diseases Research Center, Neyshabur University of Medical Sciences, Neyshabur, Iran
| | - Asieh Amini
- Ph.D. Candidate in English Language Teaching, Razi University, Kermanshah, Iran
| | - Ali Gholami
- Noncommunicable Diseases Research Center, Neyshabur University of Medical Sciences, Neyshabur, Iran
- Department of Epidemiology and Biostatistics, School of Public Health, Neyshabur University of Medical Sciences, Neyshabur, Iran
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Naderi F, Hasanirokh K. Quantum transport of massless Dirac fermions through wormhole-shaped curved graphene in presence of constant axial magnetic flux. Sci Rep 2024; 14:7763. [PMID: 38565621 DOI: 10.1038/s41598-024-57718-3] [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: 10/30/2023] [Accepted: 03/21/2024] [Indexed: 04/04/2024] Open
Abstract
In this work, we have studied the spin-dependent quantum transport of charged fermion on ( 2 + 1 ) -dimensional spacetime, whose spatial part is described by a wormhole-type geometry in the presence of constant axial magnetic flux. Choosing the solutions of the Dirac equation associated with real energy and momentum, we explored the spin-dependent transmission probabilities and giant magnetoresistance (GMR) through a single layer of wormhole graphene with an external magnetic field, using the transition matrix (T-Matrix) approach. The spin-up and spin-down components within the A and B sublattices of graphene in the matrix of 4 × 1 wave function are coupled to each other due to the wormhole structure and the magnetic field. We have found that transport properties strongly depend on the magnetic field, incident energy, and geometric parameters of the system. We observed that the transmission probability increases as the radius of the wormhole increases, and the length of the wormhole decreases. The higher energies lead to a decrease in the transmission probabilities of particles. Furthermore, we observed that the probability of the spin-flip effect is almost larger than that of the non-spin-flip effect, illustrating that electrons lose their spins during transmission. These findings highlight the complex and interesting behavior of wormhole graphene in the presence of external magnetic fields and suggest that these nano structures can have potential applications in electronic and spintronic devices.
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Affiliation(s)
- F Naderi
- Young Researchers and Elite Club, Marand Branch, Islamic Azad University, Marand, Iran
| | - K Hasanirokh
- Department of Physics, Faculty of Basic Sciences, Azarbaijan Shahid Madani University, Tabriz, 53714-161, Iran.
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Hasanirokh K, Naderi F, Mohammadpour H. Theoretical studies on optical properties of Beltrami-shaped curved graphene. J Phys Condens Matter 2023; 35. [PMID: 37040774 DOI: 10.1088/1361-648x/accbf7] [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] [Subscribe] [Scholar Register] [Received: 01/14/2023] [Accepted: 04/11/2023] [Indexed: 05/16/2023]
Abstract
We compute the optical conductivity and polarization for an out-of-plane deformation in graphene nanostructure using a theoretical approach based on Dirac equation solutions on curved2+1dimensional space-time, where the space part is considered to correspond to the Beltrami pseudosphere which belongs to the family of surfaces with negative constant Gaussian curvature. We found that different parameters of deformation along one direction translate into an enhancement of the optical conductivity peaks and polarization magnitude in the far-infrared frequencies. This allows for a very high degree of polarization with a single layer graphene and opens up a potential prospect of employing graphene layer as efficient polarizers. Therefore the experimental predictions related to the electronic configuration of the corresponding graphene-like sample may be explicitly worked out.
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Affiliation(s)
- K Hasanirokh
- Department of Physics, Faculty of Basic Sciences, Azarbaijan Shahid Madani University, 53714-161 Tabriz, Iran
| | - F Naderi
- Department of Physics, Faculty of Basic Sciences, Azarbaijan Shahid Madani University, 53714-161 Tabriz, Iran
| | - H Mohammadpour
- Department of Physics, Faculty of Basic Sciences, Azarbaijan Shahid Madani University, 53714-161 Tabriz, Iran
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Sharifnezhad A, Garmabi M, Naderi F, Darrudi F, Andishmand Z, Gholami A. Association of Sleep Duration and Quality With Health-Related Quality of Life in Fresher University Students. Sleep Med Res 2023. [DOI: 10.17241/smr.2022.01389] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2023] Open
Abstract
Background and Objective Sleep duration and quality are important factors for health-related quality of life (HRQoL). This study aimed at investigating the association of sleep duration and quality with HRQoL in fresher students of Neyshabur University of Medical Sciences.Methods The study included 471 fresher students. The sleep duration and sleep quality were measured with the Persian version of Pittsburgh Sleep Quality Index (PSQI) and the HRQoL was evaluated with the Persian version of the 12-Item Short Form Survey (SF-12). The data were collected from late September to early October in 2019 and 2020. The multiple linear regression model was used to determine the independent association of sleep duration and quality with HRQoL. A p-value ≤ 0.05 was considered statistically significant.Results The mean age of the participants was 21.8 ± 6.0 years and the majority of them (62.4%) were female. The total HRQoL score and the prevalence of poor sleep quality were 81.6% and 28.0%, respectively. Among the students, 51.8% and 6.4% reported a sleep duration shorter than 7 hours and equal or more than 9 hours, respectively. The multiple linear regression model showed that excessive sleep duration (≥ 9 h) and sleep quality were associated with Mental Component Summary (MCS) and total HRQoL, respectively (p = 0.036, p = 0.018).Conclusions Referring to the results, enough and quality sleep has beneficial effects on HRQoL in students. Therefore, future strategies should be developed to improve sleep and consequently HRQoL among university students.
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Shokouhi Z, Hamidi Tabar N, Naderi F, Meri F, Saadat F, Jafari JS. The Effect of Virtual coping skills training on self-efficacy of adolescents with type 1 diabetes during COVID-19 pandemic lockdown: A pilot study. CJHR 2022. [DOI: 10.32598/cjhr.7.2.410.1] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Background: Type 1 diabetes patients may find it difficult to cope with diabetes-related stress, which can be improved by accessible interventions. Objective: The goal of this study was to determine whether coping skill training could increase self-efficacy among adolescents with type 1 diabetes during the COVID-19 pandemic lockdown. Materials and Methods: This study was conducted as a pretest-posttest design with a control group. The study population was adolescents diagnosed with type 1 diabetes at Tehran Diabetes Center during the COVID-19 pandemic lockdown from June to August 2021. Sixteen adolescents with type 1 diabetes were selected using a purposeful sampling method. The participants were divided into experimental (n=9) and control groups (n=7). The measurement tool was the General Self-Efficacy Scale. A total of eight sessions of coping skill training took place for the experimental group; no intervention was performed for the control group. A multivariate analysis of covariance was used to analyze the data. Statistical analysis was performed utilizing SPSS, Version 23. Results: There was no significant difference between the intervention and control groups in terms of age sex, and baseline score of self-efficacy. In the posttest, self-efficacy score significantly improved in the intervention (71.52, SD=13.86) compared to the control group (48.13, SD=12.96) (F=18.97, P<0.001, η2=0.59). Conclusion: According to this study, adolescents with type 1 diabetes who received training in coping skills showed increased self-efficacy. As a result, it can be concluded that adolescents with type 1 diabetes need coping skills training interventions, including self-management support.
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Naderi F, Orojloo M, Kamali S, Jannesar R, Amani S. Synthesis, Structural Characterization, in Vitro Biological Activity, and Computational Quantum Chemical Studies of New Cobalt (II), Nickel (II), and Copper (II) Complexes Based on an Azo-Azomethine Ligand. Polycycl Aromat Compd 2022. [DOI: 10.1080/10406638.2022.2049325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Fatemeh Naderi
- Chemistry Department, Faculty of Sciences, Arak University, Arak, Iran
| | - Masoumeh Orojloo
- Chemistry Department, Faculty of Sciences, Arak University, Arak, Iran
| | - Shirin Kamali
- Chemistry Department, Faculty of Sciences, Arak University, Arak, Iran
| | - Ramin Jannesar
- Department of Pathology, Yasuj University of Medical Sciences, Yasuj, Iran
- Department of Biotechnology and Microbial Nanotechnology, Dena Pathobiology Laboratory, Yasuj, Iran
| | - Saeid Amani
- Chemistry Department, Faculty of Sciences, Arak University, Arak, Iran
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Radgoudarzi M, Vafaee-Shahi M, Naderi F. Effect of Sodium Valproate Treatment on the Cardiac Index in New Cases with Status Epilepticus. Open Neurol J 2021. [DOI: 10.2174/1874205x02115010059] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Background:
Sodium valproate is an antiepileptic drug primarily used to treat status epilepticus [SE]; however, its effect on cardiac function is unclear. This study aimed to examine the effect of 6 months of sodium valproate treatment on the cardiac index in new cases with status epilepticus.
Methods:
In this cross-sectional study, 30 cases with status epilepticus [18 boys and 12 girls] who were admitted to the Pediatric Intensive Care Unit of Hazrat-e Rasool Hospital were enrolled. Information on basic demographic and clinical data of all children, such as age, weight, gender, blood pressures, and underlying diseases, was recorded. Echocardiography and electrocardiogram [ECG] were performed for all cases before and after the treatment.
Results:
There were no abnormalities in ECG parameters [including PR, QRS, and QT intervals] after 6 months of treatment with sodium valproate. No significant differences were found in echocardiographic parameters, including blood pressure, pulmonary artery pressure [PAP], right ventricular [RV] size, diastolic dysfunction,], Tie index, end-diastolic volume [EDV], ejection fraction [EF], and TAPSE before and after study [p>0.05].
Conclusion:
Administration of sodium valproate over 6 months is not associated with a serious adverse effect on heart function in children with status epilepticus.
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López-Patiño MA, Skrzynska AK, Naderi F, Mancera JM, Míguez JM, Martos-Sitcha JA. High Stocking Density and Food Deprivation Increase Brain Monoaminergic Activity in Gilthead Sea Bream ( Sparus aurata). Animals (Basel) 2021; 11:ani11061503. [PMID: 34067338 PMCID: PMC8224653 DOI: 10.3390/ani11061503] [Citation(s) in RCA: 1] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 05/15/2021] [Accepted: 05/17/2021] [Indexed: 12/25/2022] Open
Abstract
In teleosts, brain monoamines (dopamine and serotonin) participate in the early response to different acute stressors. However, little is known regarding their role during chronic stress. In a 2 × 2 factorial design, the influence of a high stocking density (HSD) and/or food deprivation (FD) on the brain monoaminergic activity in gilthead sea bream (Sparus aurata) was evaluated. Following a 21-day experimental design, samples from the plasma and brain regions (telencephalon, hypothalamus, and optic tectum) were collected. The dopamine (DA), serotonin (5HT), and their main metabolites, 3,4-dihydroxyphenylacetic acid (DOPAC) and 5 hydroxyindoleacetic acid (5HIAA), contents were HPLC-assessed in brain tissues, and the ratios DOPAC/DA and 5HIAA/5HT were calculated as indicators of enhanced monoaminergic activity. The plasma levels of cortisol and catecholamine were also evaluated. The cortisol levels increased in fish exposed to HSD and normally fed but, also, in all FD groups, whereas the NA levels decreased in LSD-FD animals. Within the brain, the dopaminergic and serotonergic activities in telencephalon and hypothalamus increased in fish subjected to HSD and in the telencephalon of LSD-FD fish. While DA (hypothalamus) and 5HT (telencephalon) increased in the animals submitted to a HSD, food-deprived fish did not show such an increase. Taken together, our results supported the hypothesis of brain monoaminergic activity participating in maintaining and orchestrating the endocrine response to chronic stress in fish.
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Affiliation(s)
- Marcos Antonio López-Patiño
- Laboratorio de Fisioloxía Animal, Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía and Centro de Investigación Mariña, Universidad de Vigo, 36310 Vigo, Spain; (M.A.L.-P.); (F.N.); (J.M.M.)
| | - Arleta Krystyna Skrzynska
- Department of Biology, Faculty of Marine and Environmental Sciences, Campus de Excelencia Internacional del Mar (CEI·MAR), Instituto Universitario de Investigación Marina (INMAR), University of Cádiz, 11519 Puerto Real, Spain; (A.K.S.); (J.M.M.)
| | - Fatemeh Naderi
- Laboratorio de Fisioloxía Animal, Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía and Centro de Investigación Mariña, Universidad de Vigo, 36310 Vigo, Spain; (M.A.L.-P.); (F.N.); (J.M.M.)
| | - Juan Miguel Mancera
- Department of Biology, Faculty of Marine and Environmental Sciences, Campus de Excelencia Internacional del Mar (CEI·MAR), Instituto Universitario de Investigación Marina (INMAR), University of Cádiz, 11519 Puerto Real, Spain; (A.K.S.); (J.M.M.)
| | - Jesús Manuel Míguez
- Laboratorio de Fisioloxía Animal, Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía and Centro de Investigación Mariña, Universidad de Vigo, 36310 Vigo, Spain; (M.A.L.-P.); (F.N.); (J.M.M.)
| | - Juan Antonio Martos-Sitcha
- Department of Biology, Faculty of Marine and Environmental Sciences, Campus de Excelencia Internacional del Mar (CEI·MAR), Instituto Universitario de Investigación Marina (INMAR), University of Cádiz, 11519 Puerto Real, Spain; (A.K.S.); (J.M.M.)
- Correspondence:
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Chivite M, Naderi F, Conde-Sieira M, Soengas JL, Lopez-Patiño MA, Míguez JM. Central serotonin participates in the anorexigenic effect of GLP-1 in rainbow trout (Oncorhynchus mykiss). Gen Comp Endocrinol 2021; 304:113716. [PMID: 33484717 DOI: 10.1016/j.ygcen.2021.113716] [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] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Revised: 01/03/2021] [Accepted: 01/12/2021] [Indexed: 12/20/2022]
Abstract
The incretin, glucagon-like peptide-1 (GLP-1) is a major player in the gut-brain axis regulation of energy balance and in fish it seems to exert a negative influence on food intake. In this study, we investigated the role of the brain serotonergic system in the effects promoted by a peripheral GLP-1 injection on food intake in rainbow trout (Oncorhynchus mykiss). For this, in a first experiment the incretin was intraperitoneally injected (100 ng/g body weight) alone or in combination with a 5HT2C receptor antagonist (SB 242084, 1 µg/g body weight) and food intake was measured 30, 90, and 180 min later. In a second experiment, we studied the effect of these treatments on mRNA abundance of hypothalamic neuropeptides that control food intake. In addition, the effect of GLP-1 on serotonin metabolism was assessed in hindbrain and hypothalamus. Our results show that GLP-1 induced a significant food intake inhibition, which agreed with the increased expression of anorexigenic neuropeptides pomc and cart in the hypothalamus. Furthermore, GLP-1 stimulated the synthesis of serotonin in the hypothalamus, which might be indicative of a higher use of the neurotransmitter. The effects of GLP-1 on food intake were partially reversed when a serotonin receptor antagonist, SB 242084, was previously administered to trout. This antagonist also reversed the stimulatory effect of the hormone in hypothalamic pomca1 mRNA abundance. We conclude that hypothalamic serotonergic pathways are essential for mediating the effects of GLP-1 on food intake in rainbow trout. In addition, the 5HT2C receptor subtype seems to have a prominent role in the inhibition of food intake induced by GLP-1 in this species.
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Affiliation(s)
- Mauro Chivite
- Laboratorio de Fisioloxía Animal, Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía and Centro de Investigación Mariña, Universidade de Vigo, E-36310 Vigo, Spain
| | - Fatemeh Naderi
- Laboratorio de Fisioloxía Animal, Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía and Centro de Investigación Mariña, Universidade de Vigo, E-36310 Vigo, Spain
| | - Marta Conde-Sieira
- Laboratorio de Fisioloxía Animal, Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía and Centro de Investigación Mariña, Universidade de Vigo, E-36310 Vigo, Spain
| | - José Luis Soengas
- Laboratorio de Fisioloxía Animal, Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía and Centro de Investigación Mariña, Universidade de Vigo, E-36310 Vigo, Spain
| | - Marcos A Lopez-Patiño
- Laboratorio de Fisioloxía Animal, Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía and Centro de Investigación Mariña, Universidade de Vigo, E-36310 Vigo, Spain
| | - Jesús M Míguez
- Laboratorio de Fisioloxía Animal, Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía and Centro de Investigación Mariña, Universidade de Vigo, E-36310 Vigo, Spain.
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Amirani E, Aghadavod E, Shafabakhsh R, Asemi Z, Tabassi Z, Panahandeh I, Naderi F, Abed A. Anti-inflammatory and antioxidative effects of thiamin supplements in patients with gestational diabetes mellitus. J Matern Fetal Neonatal Med 2020; 35:2085-2090. [PMID: 32722956 DOI: 10.1080/14767058.2020.1779212] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
OBJECTIVE The aim of this study was to evaluate the effects of thiamin supplementation on biomarkers of inflammation and oxidative stress in patients with gestational diabetes mellitus (GDM). METHODS This randomized, double-blind, placebo-controlled trial was conducted among 60 patients with GDM. Patients were randomly allocated into two groups to receive either 100 mg/day thiamin supplements (n = 30) or placebo (n = 30) for 6 weeks. RESULTS Thiamin supplementation significantly decreased serum high-sensitivity C-reactive protein (hs-CRP) (β - 0.98 mg/L; 95% CI, -1.54, -0.42; p = .001) and plasma malondialdehyde (MDA) levels (β - 0.86 µmol/L; 95% CI, -1.15, -0.57; p < .001) when compared with the placebo. In addition, thiamin supplementation downregulated gene expression of tumor necrosis factor-alpha (TNF-α) (p = .002) in peripheral blood mononuclear cells of patients with GDM. Thiamin supplementation did not affect other biomarkers of inflammation and oxidative stress. CONCLUSION Overall, thiamin supplementation for 6 weeks to patients with GDM significantly reduced hs-CRP and MDA levels, and gene expression of TNF-α, but did not affect other biomarkers of inflammation and oxidative stress. CLINICAL TRIAL REGISTRATION NUMBER Clinical Trials.govIdentifier no. http://www.irct.ir: IRCT20170513033941N58.
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Affiliation(s)
- Elaheh Amirani
- Research Center for Biochemistry and Nutrition in Metabolic Diseases, Institute for Basic Sciences, Kashan University of Medical Sciences, Kashan, Iran
| | - Esmat Aghadavod
- Research Center for Biochemistry and Nutrition in Metabolic Diseases, Institute for Basic Sciences, Kashan University of Medical Sciences, Kashan, Iran
| | - Rana Shafabakhsh
- Research Center for Biochemistry and Nutrition in Metabolic Diseases, Institute for Basic Sciences, Kashan University of Medical Sciences, Kashan, Iran
| | - Zatollah Asemi
- Research Center for Biochemistry and Nutrition in Metabolic Diseases, Institute for Basic Sciences, Kashan University of Medical Sciences, Kashan, Iran
| | - Zohreh Tabassi
- Department of Gynecology and Obstetrics, School of Medicine, Kashan University of Medical Sciences, Kashan, Iran
| | - Ida Panahandeh
- Department of Gynecology and Obstetrics, School of Medicine, Kashan University of Medical Sciences, Kashan, Iran
| | - Fatemeh Naderi
- Department of Gynecology and Obstetrics, School of Medicine, Kashan University of Medical Sciences, Kashan, Iran
| | - Alireza Abed
- Physiology Research Center, Kashan University of Medical Sciences, Kashan, Iran
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Naderi F, Orojloo M, Jannesar R, Amani S. Synthesis and Spectroscopic Studies of an Azo-Azomethine Receptor for Naked-Eye Detection of Hydrogen Carbonate Ions in Aqueous Media. Polycycl Aromat Compd 2019. [DOI: 10.1080/10406638.2019.1672201] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Fatemeh Naderi
- Chemistry Department, Faculty of Sciences, Arak University, Arak, Iran
| | - Masoumeh Orojloo
- Chemistry Department, Faculty of Sciences, Arak University, Arak, Iran
| | - Ramin Jannesar
- Department of Pathology, Yasuj University of Medical Sciences, Yasuj, Iran
- Department of Biotechnology and Microbial Nanotechnology, Dena Pathobiology Laboratory, Yasuj, Iran
| | - Saeid Amani
- Chemistry Department, Faculty of Sciences, Arak University, Arak, Iran
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Adigozali H, Shadmehr A, Ebrahimi E, Rezasoltani A, Naderi F. B mode, Doppler and ultrasound elastography imaging on active trigger point in women with myofascial pain syndrome treated by dry needling. Muscles Ligaments Tendons J 2019. [DOI: 10.32098/mltj.03.2019.16] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- H. Adigozali
- Physical Therapy Department, School of Rehabilitation, Tabriz University of Medical Sciences, Tabriz, Iran
| | - A. Shadmehr
- Physical Therapy Department, School of Rehabilitation, Tehran University of Medical Sciences, Tehran, Iran
| | - E. Ebrahimi
- School of Rehabilitation, Iran University of Medical Sciences, Tehran, Iran
| | - A. Rezasoltani
- ysiotherapy Department, School of Rehabilitation, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - F. Naderi
- Radiology Department, Iran University of Medical Sciences, Tehran, Iran
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Ceinos RM, Chivite M, López-Patiño MA, Naderi F, Soengas JL, Foulkes NS, Míguez JM. Differential circadian and light-driven rhythmicity of clock gene expression and behaviour in the turbot, Scophthalmus maximus. PLoS One 2019; 14:e0219153. [PMID: 31276539 PMCID: PMC6611576 DOI: 10.1371/journal.pone.0219153] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Accepted: 06/17/2019] [Indexed: 12/19/2022] Open
Abstract
In fish, the circadian clock represents a key regulator of many aspects of biology and is controlled by combinations of abiotic and biotic factors. These environmental factors are frequently manipulated in fish farms as part of strategies designed to maximize productivity. The flatfish turbot, Scophthalmus maximus, represents one of the most important species within the aquaculture sector in Asia and Europe. Despite the strategic importance of this species, the function and regulation of the turbot circadian system remains poorly understood. Here, we have characterized the core circadian clock genes, clock1, per1, per2 and cry1 in turbot and have studied their daily expression in various tissues under a range of lighting conditions and feeding regimes. We have also explored the influence of light and feeding time on locomotor activity. Rhythmic expression of the four core clock genes was observed in all tissues studied under light dark (LD) cycle conditions. Rhythmicity of clock gene expression persisted upon transfer to artificial free running, constant conditions confirming their endogenous circadian clock control. Furthermore, turbot showed daily cycles of locomotor activity and food anticipatory activity (FAA) under LD and scheduled-feeding, with the activity phase as well as FAA coinciding with and being dependent upon exposure to light. Thus, while FAA was absent under constant dark (DD) conditions, it was still detected in constant light (LL). In contrast, general locomotor activity was arrhythmic in both constant darkness and constant light, pointing to a major contribution of light, in concert with the circadian clock, in timing locomotor activity in this species. Our data represents an important contribution to our understanding of the circadian timing system in the turbot and thereby the optimization of rearing protocols and the improvement of the well-being of turbot within fish farming environments.
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Affiliation(s)
- Rosa M. Ceinos
- Laboratorio de Fisioloxía Animal, Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía and Centro de Investigación Mariña, Universidade de Vigo, Vigo (Pontevedra), Spain
- * E-mail:
| | - Mauro Chivite
- Laboratorio de Fisioloxía Animal, Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía and Centro de Investigación Mariña, Universidade de Vigo, Vigo (Pontevedra), Spain
| | - Marcos A. López-Patiño
- Laboratorio de Fisioloxía Animal, Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía and Centro de Investigación Mariña, Universidade de Vigo, Vigo (Pontevedra), Spain
| | - Fatemeh Naderi
- Laboratorio de Fisioloxía Animal, Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía and Centro de Investigación Mariña, Universidade de Vigo, Vigo (Pontevedra), Spain
| | - José L. Soengas
- Laboratorio de Fisioloxía Animal, Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía and Centro de Investigación Mariña, Universidade de Vigo, Vigo (Pontevedra), Spain
| | - Nicholas S. Foulkes
- Institute of Toxicology and Genetics, Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany
| | - Jesús M. Míguez
- Laboratorio de Fisioloxía Animal, Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía and Centro de Investigación Mariña, Universidade de Vigo, Vigo (Pontevedra), Spain
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Mesdaghinia E, Naderi F, Bahmani F, Chamani M, Ghaderi A, Asemi Z. The effects of zinc supplementation on clinical response and metabolic profiles in pregnant women at risk for intrauterine growth restriction: a randomized, double-blind, placebo-controlled trial. J Matern Fetal Neonatal Med 2019; 34:1382-1388. [PMID: 31248307 DOI: 10.1080/14767058.2019.1637847] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
OBJECTIVE This investigation was conducted to assess the effects of zinc supplementation on clinical response and metabolic status among pregnant women at risk for intrauterine growth restriction (IUGR). METHODS This randomized, double-blind, placebo-controlled, clinical trial was conducted among 52 women at risk for IUGR according to abnormal uterine artery Doppler waveform. Participants were randomly assigned to take either 233 mg zinc gluconate (containing 30 mg zinc) supplements (n = 26) or placebo (n = 26) for 10 weeks from 17 to 27 weeks of gestation. Fasting blood samples were taken at baseline and after the 10-week treatment to quantify related variables. RESULTS After the 10-week intervention, taking zinc led to a significant reduction in serum high-sensitivity C-reactive protein (hs-CRP) (β ‒1.17 mg/L; 95% CI, -1.77, -0.57; p < .001) and plasma malondialdehyde (MDA) levels (β -0.23 µmol/L; 95% CI, -0.45, -0.02; p = .03); also a significant rise in total antioxidant capacity (TAC) (β 59.22 mmol/L; 95% CI, 25.07, 93.36; p = .001) was observed in comparison to placebo. In addition, zinc supplementation significantly reduced serum insulin (β -1.33 µIU/mL; 95% CI, -2.00, -0.67; p < .001) and insulin resistance (β -0.30; 95% CI, -0.44, -0.15; p < .001), and significantly increased insulin sensitivity (β 0.008; 95% CI, 0.003, 0.01; p < .001) compared with the placebo. Zinc supplementation did not influence pulsatility index (PI) and other metabolic parameters. CONCLUSIONS Overall, zinc supplementation in pregnant women at risk for IUGR had beneficial effects on TAC, MDA, hs-CRP, and insulin metabolism, but did not affect PI and other metabolic profiles.
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Affiliation(s)
- Elaheh Mesdaghinia
- Department of Gynecology and Obstetrics, School of Medicine, Kashan University of Medical Sciences, Kashan, Iran
| | - Fatemeh Naderi
- Department of Gynecology and Obstetrics, School of Medicine, Kashan University of Medical Sciences, Kashan, Iran
| | - Fereshteh Bahmani
- Research Center for Biochemistry and Nutrition in Metabolic Diseases, Kashan University of Medical Sciences, Kashan, Iran
| | - Maryam Chamani
- Department of Gynecology and Obstetrics, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Amir Ghaderi
- Department of Addiction Studies, School of Medicine, Kashan University of Medical Sciences, Kashan, Iran.,Clinical Research Development Unit, Matini/Kargarnejad Hospital, Kashan University of Medical Sciences, Kashan, Iran
| | - Zatollah Asemi
- Research Center for Biochemistry and Nutrition in Metabolic Diseases, Kashan University of Medical Sciences, Kashan, Iran
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15
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Naderi F, Míguez JM, Soengas JL, López-Patiño MA. SIRT1 mediates the effect of stress on hypothalamic clock genes and food intake regulators in rainbow trout, Oncorhynchus mykiss. Comp Biochem Physiol A Mol Integr Physiol 2019; 235:102-111. [PMID: 31152913 DOI: 10.1016/j.cbpa.2019.05.021] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Revised: 05/14/2019] [Accepted: 05/20/2019] [Indexed: 11/24/2022]
Abstract
Stress negatively affects a wide range of physiological and behavioural functions (circadian physiology and food intake, among others), thus compromising animal welfare. Cortisol mediates the effect of stress on food intake, but other mediators (such as sirtuins) may participate in that related to circadian physiology. We evaluated 1) the effect of stress on the day-night variation of hypothalamic clock genes and food intake regulators, 2) changes of mRNA abundance in cortisol biosynthesis at the head kidney, and 3) changes of glucocorticoid receptors in both tissues of rainbow trout, together with the involvement of SIRT1 in such effect. Trout receiving or not SIRT1 inhibitor (EX527) and subjected or not to stress by high stocking density (72 h), were sampled at day- (ZT10) and night-time (ZT18). Our results indicate that SIRT1 mediates the effect of stress on mRNA abundance of clock genes in trout hypothalamus, but it also influences those changes occurring on food intake-related peptides. High stocking density inhibits clock genes expression, but enhances that of food intake-related peptides. EX527 treatment prevents stress-related changes observed in clock genes, thus evidencing a key role played by SIRT1 in mediating this effect on trout circadian oscillators. On the other hand, EX527 treatment partially prevents changes of food intake-related peptides, indicating that an interaction between SIRT1 and other mediators (such as cortisol) exists during response to stress. In support of that, our results reveal that SIRT1 influences cortisol biosynthesis during stress. Whatever the case is, further research will help understanding the underlying mechanisms involved.
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Affiliation(s)
- Fatemeh Naderi
- Laboratorio de Fisioloxía Animal, Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía and Centro Singular de Investigación Mariña-ECIMAT, Universidade de Vigo, Spain
| | - Jesús M Míguez
- Laboratorio de Fisioloxía Animal, Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía and Centro Singular de Investigación Mariña-ECIMAT, Universidade de Vigo, Spain
| | - José L Soengas
- Laboratorio de Fisioloxía Animal, Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía and Centro Singular de Investigación Mariña-ECIMAT, Universidade de Vigo, Spain
| | - Marcos A López-Patiño
- Laboratorio de Fisioloxía Animal, Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía and Centro Singular de Investigación Mariña-ECIMAT, Universidade de Vigo, Spain.
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16
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Hernández-Pérez J, Naderi F, Chivite M, Soengas JL, Míguez JM, López-Patiño MA. Influence of Stress on Liver Circadian Physiology. A Study in Rainbow Trout, Oncorhynchus mykiss, as Fish Model. Front Physiol 2019; 10:611. [PMID: 31164837 PMCID: PMC6536609 DOI: 10.3389/fphys.2019.00611] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Accepted: 04/29/2019] [Indexed: 12/17/2022] Open
Abstract
In vertebrates stress negatively affects body homeostasis and triggers a battery of metabolic responses, with liver playing a key role. This organ responds with altered metabolism, leading the animal to cope with the stress situation, which involves carbohydrate and lipid mobilization. However, metabolism among other physiological functions is under circadian control within the liver. Then, metabolic homeostasis at system level involves circadian timing systems within tissues and cells, and collaborate with each other. During chronic stress, cortisol maintains the liver metabolic response by modulating carbohydrate- and lipid-related metabolism. Stress also disrupts the circadian oscillator within the liver in mammals, whereas little information is available in other vertebrates, such as fish. To raise the complexity of this process, other candidates may mediate in such effect of stress. In fact, sirtuin1, a link between cellular sensing of energy status and circadian clocks, participates in the response to stress in mammals, but no information is available in fish. Considering the role played by liver in providing energy for the animal to deal with an adverse situation, and the existence of a circadian oscillator within this tissue, jeopardized liver circadian physiology during stress exposure might be expected. Whether the physiological response to stress is a well conserved process through the phylogeny and the mechanisms involved in such response is a question that remains to be elucidated. Then, we provide information at this respect in mammals and show comparable results in rainbow trout as fish animal model. Similar to that in mammals, stress triggers a series of responses in fish that leads the animal to cope with the adverse situation. Stress influences liver physiology in fish, affecting carbohydrate and lipid metabolism-related parameters, and the circadian oscillator as well. In a similar way than that of mammals different mediators participate in the response of liver circadian physiology to stress in fish. Among them, we confirm for the teleost rainbow trout a role of nuclear receptors (rev-erbβ), cortisol, and sirt1. However, further research is needed to evaluate the independent effect of each one, or the existence of any interaction among them.
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Affiliation(s)
- Juan Hernández-Pérez
- Laboratorio de Fisioloxía Animal, Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía, Universidade de Vigo, Vigo, Spain
| | - Fatemeh Naderi
- Laboratorio de Fisioloxía Animal, Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía, Universidade de Vigo, Vigo, Spain
| | - Mauro Chivite
- Laboratorio de Fisioloxía Animal, Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía, Universidade de Vigo, Vigo, Spain
| | - José L Soengas
- Laboratorio de Fisioloxía Animal, Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía, Universidade de Vigo, Vigo, Spain
| | - Jesús M Míguez
- Laboratorio de Fisioloxía Animal, Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía, Universidade de Vigo, Vigo, Spain
| | - Marcos A López-Patiño
- Laboratorio de Fisioloxía Animal, Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía, Universidade de Vigo, Vigo, Spain
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17
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Mohammadi MR, Alavi SS, Ahmadi N, Khaleghi A, Kamali K, Ahmadi A, Hooshyari Z, Mohamadian F, Jaberghaderi N, Nazaribadie M, Sajedi Z, Farshidfar Z, Kaviani N, Davasazirani R, Shahbakhsh AJ, Rad MR, Shahbazi K, Khodaverdloo RR, Tehrani LN, Nasiri M, Naderi F, Kiani A, Chegeni M, Hashemi Nasab SM, Ghaneian M, Parsamehr H, Nilforoushan N, Amiri S, Fooladi MF, Mohammadzadeh S, Ahmadipour A, Sarraf N, Hojjat SK, Nadermohammadi M, Mostafavi SA, Zarafshan H, Salmanian M, Shakiba A, Ashoori S. The prevalence, comorbidity and socio-demographic factors of depressive disorder among Iranian children and adolescents: To identify the main predictors of depression. J Affect Disord 2019; 247:1-10. [PMID: 30640024 DOI: 10.1016/j.jad.2019.01.005] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [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: 08/18/2018] [Revised: 12/23/2018] [Accepted: 01/04/2019] [Indexed: 01/04/2023]
Abstract
BACKGROUND Depressive disorders are a major public health problem in developed and developing countries. Recently, several risk factors have been described for depressive disorders in children and adolescents. The aim of the present study was to identify the main risk factors that can affect the incidence of depression in Iranian children and adolescents. METHODS A total of 30,546 children and adolescents (between 6 and 18 years of age) participated in a cross-sectional study to identify the predictors of depressive disorders. Depressive disorders were assessed using the Persian version of the Kiddie Schedule for Affective Disorders and Schizophrenia (K-SADS-PL). In addition, a demographic characteristics questionnaire was completed by parents of the participants. The data was analyzed using the SPSS22 software via performing the descriptive analysis and the multiple logistic regression analysis methods. P-values less than 0.05 were considered statistically significant. RESULTS Results showed that a higher age (15-18), being female, and the father's unemployment were associated with an increased odds ratio for depressive disorders. The age of 10-14 (OR = 2.1; 95% CI, 1.57-2.81), the age of 15-18 (OR = 4.44; 95% CI, 3.38-5.83), female gender (OR = 1.44; 95% CI, 1.2-1.73) and the father's unemployment (OR = 1.59; 95% CI, 1.01-2.5) were significant positive predictors, whereas, the mother's job (as a housewife) (OR = 0.66; 95% CI, 0.45-0.96) and a history of psychiatric hospitalization of the father and mother (OR = 0.34; 95% CI, 0.15-0.78 and OR = 0.34; 95% CI, 0.14-0.84) were negative predictors for depressive symptoms. CONCLUSION Depressive symptoms are common in children and adolescents and are correlated with age and gender. The assessment of the prevalence of psychiatric disorders, especially the depressive disorders and their comorbidities, may help to prevent mood disorders in children and adolescents.
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Affiliation(s)
- Mohammad Reza Mohammadi
- Psychiatry and Psychology Research Center, Tehran University of Medical Sciences, Tehran, Iran.
| | - Seyyed Salman Alavi
- Psychiatry and Psychology Research Center, Tehran University of Medical Sciences, Tehran, Iran.
| | - Nastran Ahmadi
- Yazd Cardiovascular Research Center, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.
| | - Ali Khaleghi
- Psychiatry and Psychology Research Center, Tehran University of Medical Sciences, Tehran, Iran.
| | - Koorosh Kamali
- Department of Public Health, School of Public Health, Zanjan University of Medical Sciences, Zanjan, Iran.
| | - Ameneh Ahmadi
- Psychiatry and Psychology Research Center, Tehran University of Medical Sciences, Tehran, Iran.
| | - Zahra Hooshyari
- Psychiatry and Psychology Research Center, Tehran University of Medical Sciences, Tehran, Iran.
| | - Fathola Mohamadian
- Department of Psychology, Psychosocial Injuries Research Center, Ilam University of Medical Science, Ilam, Iran.
| | - Nasrin Jaberghaderi
- Department of Clinical Psychology, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran.
| | - Marzieh Nazaribadie
- Research Center for Behavioral Disorders and Substance Abuse, Hamadan University of Medical Sciences, Hamadan, Iran.
| | - Zahra Sajedi
- Faculty of Psychology and Educational Sciences, University of Semnan, Semnan, Iran.
| | | | - Nahid Kaviani
- Health Deputy, Kerman University of Medical Sciences, Kerman, Iran.
| | - Reza Davasazirani
- Community Mental Health and Addiction Health Department of Khuzestan Province, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
| | | | | | | | | | | | | | - Fatemeh Naderi
- Hormozgan University of Medical Sciences, Hormozgan, Iran.
| | - Arezou Kiani
- Urmia University of Medical Sciences, Urmia, Iran.
| | | | | | - Mahnaz Ghaneian
- Department of Psychology, Islamic Azad University, Najafabad Branch, Najafabad, Iran.
| | - Hosein Parsamehr
- Lorestan University of Medical Sciences, Imam Reza Psychiatric Hospital, Khorramabad, Iran.
| | | | - Shahrokh Amiri
- Research Center of Psychiatry and Behavioral Sciences, Tabriz University of Medical Sciences, Tabriz, Iran.
| | - Mahbod Fadaei Fooladi
- Department of Psychology and Educational Sciences, Allameh Tabatabai University, Tehran, Iran.
| | - Soleiman Mohammadzadeh
- Department of Psychiatry, Neuroscience Research Center, Kurdistan University of Medical Sciences, Sanandaj, Iran.
| | - Ahmad Ahmadipour
- Department of Psychiatry, Booshehr University of Medical Sciences, Khalij-E Fars Hospital. Booshehr, Iran.
| | - Nasrin Sarraf
- Department of Child and Adolescents Psychiatry, School of Medicine, Qazvin University of Medical Sciences, Qazvin, Iran.
| | - Seyed Kaveh Hojjat
- Addiction and Behavioral Sciences Research Center, North Khorasan University of Medical Sciences, Bojnurd, Iran.
| | | | - Seyed-Ali Mostafavi
- Psychiatry and Psychology Research Center, Tehran University of Medical Sciences, Tehran, Iran.
| | - Hadi Zarafshan
- Psychiatry and Psychology Research Center, Tehran University of Medical Sciences, Tehran, Iran.
| | - Maryam Salmanian
- Psychiatry and Psychology Research Center, Tehran University of Medical Sciences, Tehran, Iran.
| | - Alia Shakiba
- Psychiatry and Psychology Research Center, Tehran University of Medical Sciences, Tehran, Iran.
| | - Simin Ashoori
- Mashhad University of Medical Sciences, Mashhad, Iran.
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18
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Bayat H, Naderi F, Khan AH, Memarnejadian A, Rahimpour A. The Impact of CRISPR-Cas System on Antiviral Therapy. Adv Pharm Bull 2018; 8:591-597. [PMID: 30607331 PMCID: PMC6311650 DOI: 10.15171/apb.2018.067] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [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: 01/17/2018] [Revised: 09/08/2018] [Accepted: 09/29/2018] [Indexed: 12/16/2022] Open
Abstract
Clustered regularly interspaced short palindromic repeats (CRISPR)-associated protein nuclease (Cas) is identified as an adaptive immune system in archaea and bacteria. Type II of this system, CRISPR-Cas9, is the most versatile form that has enabled facile and efficient targeted genome editing. Viral infections have serious impacts on global health and conventional antiviral therapies have not yielded a successful solution hitherto. The CRISPR-Cas9 system represents a promising tool for eliminating viral infections. In this review, we highlight 1) the recent progress of CRISPR-Cas technology in decoding and diagnosis of viral outbreaks, 2) its applications to eliminate viral infections in both pre-integration and provirus stages, and 3) various delivery systems that are employed to introduce the platform into target cells.
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Affiliation(s)
- Hadi Bayat
- Department of Tissue Engineering and Applied Cell Sciences, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.,Department of Molecular Genetics, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran
| | - Fatemeh Naderi
- Department of Molecular Genetics, Tehran Medical Sciences Branch, Islamic Azad University, Tehran, Iran
| | - Amjad Hayat Khan
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, Penang, Malaysia
| | | | - Azam Rahimpour
- Department of Tissue Engineering and Applied Cell Sciences, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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19
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Naderi F, Hashemi M, Bayat H, Mohammadian O, Pourmaleki E, Etemadzadeh MH, Rahimpour A. The Augmenting Effects of the tDNA Insulator on Stable Expression of Monoclonal Antibody in Chinese Hamster Ovary Cells. Monoclon Antib Immunodiagn Immunother 2018; 37:200-206. [DOI: 10.1089/mab.2018.0015] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Fatemeh Naderi
- Department of Genetics, Tehran Medical Branch, Islamic Azad University, Tehran, Iran
| | - Mehrdad Hashemi
- Department of Genetics, Tehran Medical Branch, Islamic Azad University, Tehran, Iran
| | - Hadi Bayat
- Department of Tissue Engineering and Applied Cell Sciences, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Omid Mohammadian
- Department of Clinical Biochemistry, Faculty of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Es'hagh Pourmaleki
- Department of Tissue Engineering and Applied Cell Sciences, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | | | - Azam Rahimpour
- Department of Tissue Engineering and Applied Cell Sciences, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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20
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Naderi F, Hernández-Pérez J, Chivite M, Soengas JL, Míguez JM, López-Patiño MA. Involvement of cortisol and sirtuin1 during the response to stress of hypothalamic circadian system and food intake-related peptides in rainbow trout, Oncorhynchus mykiss. Chronobiol Int 2018; 35:1122-1141. [PMID: 29737878 DOI: 10.1080/07420528.2018.1461110] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Stress is conditioning animal welfare by negatively affecting a wide range of physiological and behavioral functions. This may be applied to circadian physiology and food intake. Cortisol, the stress-related hormone, may mediate such effect of stress, but other indirect mediators might be considered, such as sirtuin1. Then, either the independent modulatory effect or the existence of any interaction between mediators may be responsible. The circadian system is the main modulator of several integrative mechanisms at both central and peripheral levels that are rhythmically presented, thus influencing different processes such as food intake. In this way, food intake is controlled by the circadian system, as demonstrated by the persistence of such rhythms of food intake in the absence of environmental external cues. Our study aimed to evaluate the daily profile of hypothalamic mRNA abundance of circadian clock genes (clock1a, bmal1, per1 and rev-erbβ-like), and food intake regulators (crf, pomc-a1, cart, and npy) in rainbow trout (Oncorhynchus mykiss), the impact of stress on such rhythms, and the involvement of cortisol and sirtuin1 as mediators. Four cohorts of trout were subjected to 1) normal stocking density (control group), 2) high stocking density for 72 hours (stress group), 3) normal stocking density and implanted with mifepristone, a glucocorticoid receptors antagonist, and 4) mifepristone administered and stressed for 72 hours. Fish from each group were sampled every 4-h along the 24-h LD cycle, and cortisol, glucose and lactate plasma levels were evaluated. Hypothalamic mRNA abundance of clock genes, food intake regulators, glucocorticoid receptors and sirtuin1 were qPCR assayed. Our results reveal the impact of stress on most of the genes assayed, but different mechanisms appear to be involved. The rhythm of clock genes displayed decreased amplitude and averaged levels in stressed trout, with no changes of the acrophase being observed. This effect was not prevented by mifepristone. On the contrary, the effect of stress on the daily profile of crf, pomc-a1, and npy was totally prevented by mifepristone administration. Accordingly, cortisol appears to mainly mediate the effect of stress on food intake regulators through binding to specific glucocorticoid receptors within trout hypothalamus, whereas sirtuin1 is apparently mediating such effects on the circadian system in the same brain region. Further research must be performed to clarify those mechanisms through which stress influences food intake and the circadian oscillator within the same brain region, hypothalamus, in rainbow trout, and the interaction among them all.
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Affiliation(s)
- Fatemeh Naderi
- a Laboratorio de Fisioloxía Animal, Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía and Centro Singular de Investigación Mariña-ECIMAT , Universidade de Vigo , Spain
| | - Juan Hernández-Pérez
- a Laboratorio de Fisioloxía Animal, Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía and Centro Singular de Investigación Mariña-ECIMAT , Universidade de Vigo , Spain
| | - Mauro Chivite
- a Laboratorio de Fisioloxía Animal, Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía and Centro Singular de Investigación Mariña-ECIMAT , Universidade de Vigo , Spain
| | - José L Soengas
- a Laboratorio de Fisioloxía Animal, Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía and Centro Singular de Investigación Mariña-ECIMAT , Universidade de Vigo , Spain
| | - Jesús M Míguez
- a Laboratorio de Fisioloxía Animal, Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía and Centro Singular de Investigación Mariña-ECIMAT , Universidade de Vigo , Spain
| | - Marcos A López-Patiño
- a Laboratorio de Fisioloxía Animal, Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía and Centro Singular de Investigación Mariña-ECIMAT , Universidade de Vigo , Spain
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21
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Skrzynska AK, Maiorano E, Bastaroli M, Naderi F, Míguez JM, Martínez-Rodríguez G, Mancera JM, Martos-Sitcha JA. Impact of Air Exposure on Vasotocinergic and Isotocinergic Systems in Gilthead Sea Bream ( Sparus aurata): New Insights on Fish Stress Response. Front Physiol 2018; 9:96. [PMID: 29487539 PMCID: PMC5816901 DOI: 10.3389/fphys.2018.00096] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Accepted: 01/29/2018] [Indexed: 12/20/2022] Open
Abstract
The hypothalamus-pituitary-interrenal (HPI) and hypothalamus-sympathetic-chromaffin cell (HSC) axes are involved in the regulation of the stress response in teleost. In this regard, the activation of a complex network of endocrine players is needed, including corticotrophin-releasing hormone (Crh), Crh binding protein (Crhbp), proopiomelanocortin (Pomc), thyrotropin-releasing hormone (Trh), arginine vasotocin (Avt), and isotocin (It) to finally produce pleiotropic functions. We aimed to investigate, using the gilthead sea bream (Sparus aurata) as a biological model, the transcriptomic response of different endocrine factors (crh, crhbp, pomcs, trh), neuropeptides (avt and it), and their specific receptors (avtrv1a, avtrv2, and itr) in four important target tissues (hypothalamus, pituitary, kidney and liver), after an acute stress situation. We also investigated several stress hormones (catecholamines and cortisol). The stress condition was induced by air exposure for 3 min, and hormonal, metabolic and transcriptomic parameters were analyzed in a time course response (15 and 30 min, and 1, 2, 4, and 8 h post-stress) in a total of 64 fish (n = 8 fish per experimental group; p = 0.05; statistical power = 95%). Our results showed that plasma noradrenaline, adrenaline and cortisol values increased few minutes after stress exposure. At hypothalamic and hypophyseal levels, acute stress affected mRNA expression of all measured precursors and hormonal factors, as well as their receptors (avtrs and itr), showing the activation, at central level, of HPI, HSC, and Avt/It axes in the acute stress response. In addition, stress response also affected mRNA levels of avtrs and itr in the head kidney, as well as the steroidogenic acute regulatory protein (star) and tyrosine hydroxylase (th) expression, suggesting their participation in the HPI and HSC axes activation. Moreover, the pattern of changes in hepatic avtrs and itr gene expression also highlights an important role of vasotocinergic and isotocinergic pathways in liver metabolic organization after acute stress events. Our results demonstrate, both at transcriptional and circulating levels of several hormones, the existence of a complex activation of different endocrine pathways in S. aurata related to the stress pathways, where vasotocinergic and isotocinergic systems can also be considered key players of the acute stress response orchestration.
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Affiliation(s)
- Arleta K Skrzynska
- Department of Biology, Faculty of Marine and Environmental Sciences, University of Cádiz, Cádiz, Spain
| | - Elisabetta Maiorano
- Department of Biology, Faculty of Marine and Environmental Sciences, University of Cádiz, Cádiz, Spain
| | - Marco Bastaroli
- Department of Biology, Faculty of Marine and Environmental Sciences, University of Cádiz, Cádiz, Spain
| | - Fatemeh Naderi
- Laboratorio de Fisiología animal, Departamento de Biología Funcional y CC. de la Salud, Facultad de Biología, Universidade de Vigo, Pontevedra, Spain
| | - Jesús M Míguez
- Laboratorio de Fisiología animal, Departamento de Biología Funcional y CC. de la Salud, Facultad de Biología, Universidade de Vigo, Pontevedra, Spain
| | - Gonzalo Martínez-Rodríguez
- Department of Marine Biology and Aquacuture, Instituto de Ciencias Marinas de Andalucía, Consejo Superior de Investigaciones Científicas, Cádiz, Spain
| | - Juan M Mancera
- Department of Biology, Faculty of Marine and Environmental Sciences, University of Cádiz, Cádiz, Spain
| | - Juan A Martos-Sitcha
- Department of Biology, Faculty of Marine and Environmental Sciences, University of Cádiz, Cádiz, Spain.,Department of Marine Biology and Aquacuture, Instituto de Ciencias Marinas de Andalucía, Consejo Superior de Investigaciones Científicas, Cádiz, Spain.,Nutrigenomics and Fish Growth Endocrinology Group, Institute of Aquaculture Torre de la Sal, Consejo Superior de Investigaciones Científicas, Castellón, Spain
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22
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Monajjemi M, Naderi F, Mollaamin F, Khaleghian M. Drug Design Outlook by Calculation of Second Virial Coefficient as a Nano Study. J MEX CHEM SOC 2017. [DOI: 10.29356/jmcs.v56i2.323] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Intermolecular potential energy surface for an interaction of drug with Na has been examined using HF level of theory with 6-31G* basis set. The name of drug is meso-tetrakis (p-sulphonatophenyl) porphyrin (here after abbreviated to TSPP) . The numbers of Na<sup>+</sup> have a significant effect on the calculated potential energy curve (including position, depth, and width of the potential well). Counterpoise (CP) correction has been used to show the extent of the basis set superposition error (BSSE) on the potential energy curves obtained for TSPPNa. The second virial coefficients are calculated by these data.
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23
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Orojloo M, Arabahmadi R, Naderi F, Parchegani F, Solimannejad M, Zolgharnein P, Amani S. A novel receptor for detection of Zn2+ metal ion and F−, H2PO4
− and AcO− anions in aqueous media: a DFT study. Chem Pap 2017. [DOI: 10.1007/s11696-017-0312-7] [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] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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24
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Hernández-Pérez J, Míguez JM, Naderi F, Soengas JL, López-Patiño MA. Influence of light and food on the circadian clock in liver of rainbow trout, Oncorhynchus mykiss. Chronobiol Int 2017; 34:1259-1272. [DOI: 10.1080/07420528.2017.1361435] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Juan Hernández-Pérez
- Laboratorio de Fisioloxía Animal, Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía and Centro Singular de Investigación Mariña-ECIMAT, Universidade de Vigo, Vigo, Spain
| | - Jesús M. Míguez
- Laboratorio de Fisioloxía Animal, Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía and Centro Singular de Investigación Mariña-ECIMAT, Universidade de Vigo, Vigo, Spain
| | - Fatemeh Naderi
- Laboratorio de Fisioloxía Animal, Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía and Centro Singular de Investigación Mariña-ECIMAT, Universidade de Vigo, Vigo, Spain
| | - José L. Soengas
- Laboratorio de Fisioloxía Animal, Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía and Centro Singular de Investigación Mariña-ECIMAT, Universidade de Vigo, Vigo, Spain
| | - Marcos A. López-Patiño
- Laboratorio de Fisioloxía Animal, Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía and Centro Singular de Investigación Mariña-ECIMAT, Universidade de Vigo, Vigo, Spain
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25
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Naderi F. Structures and electronic properties of C12Si8X8 (X = H, F, and Cl). Russ J Phys Chem 2016. [DOI: 10.1134/s0036024416070220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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26
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Hernández-Pérez J, Míguez JM, Librán-Pérez M, Otero-Rodiño C, Naderi F, Soengas JL, López-Patiño MA. Daily rhythms in activity and mRNA abundance of enzymes involved in glucose and lipid metabolism in liver of rainbow trout, Oncorhynchus mykiss. Influence of light and food availability. Chronobiol Int 2015; 32:1391-408. [PMID: 26587750 DOI: 10.3109/07420528.2015.1100633] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The present research aimed to investigate in a model of teleost fish (rainbow trout) the existence of daily changes in activity and mRNA abundance of several proteins involved in major pathways of carbohydrate and lipid metabolism in liver, and to test whether or not both the light-dark cycle and food availability might influence such rhythms. For this purpose, four cohorts of animals previously adapted to normal housing conditions (12L:12D; Lights on at ZT0; feeding time at ZT2) were subjected to: normal conditions (LD); 48-h constant darkness (DD); 96-h food deprivation (LD + Fasting); or constant darkness and food deprivation (DD + Fasting) respectively. After such time periods, fish were sacrificed and sampled every 4-h on the following 24-h period (ZT/CT0, 4, 8, 12, 16, 20 and 0'). Our results reveal that cortisol and all the analysed genes (gk, pepck, g6pase, pk, glut2, hoad and fas) exhibited well defined daily rhythms, which persisted even in the absence of light and/or food indicating the endogenous nature of such rhythms. Even when the variations of enzyme activities were not significant, their rhythms mostly paralleled those of the respective gene expression. The rhythms of mRNA abundance were apparently dependent on the presence of food, but the light/dark cycle also influenced such rhythms. Since cortisol does not appear to be mainly involved in generating such daily rhythms in liver, alternative mechanisms might be involved, such as a direct interaction between metabolism and the circadian system.
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Affiliation(s)
- Juan Hernández-Pérez
- a Laboratorio de Fisioloxía Animal , Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía, Universidade de Vigo , Vigo (Pontevedra) , Spain
| | - Jesús M Míguez
- a Laboratorio de Fisioloxía Animal , Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía, Universidade de Vigo , Vigo (Pontevedra) , Spain
| | - Marta Librán-Pérez
- a Laboratorio de Fisioloxía Animal , Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía, Universidade de Vigo , Vigo (Pontevedra) , Spain
| | - Cristina Otero-Rodiño
- a Laboratorio de Fisioloxía Animal , Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía, Universidade de Vigo , Vigo (Pontevedra) , Spain
| | - Fatemeh Naderi
- a Laboratorio de Fisioloxía Animal , Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía, Universidade de Vigo , Vigo (Pontevedra) , Spain
| | - José L Soengas
- a Laboratorio de Fisioloxía Animal , Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía, Universidade de Vigo , Vigo (Pontevedra) , Spain
| | - Marcos A López-Patiño
- a Laboratorio de Fisioloxía Animal , Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía, Universidade de Vigo , Vigo (Pontevedra) , Spain
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Monajjemi M, Razavian MH, Mollaamin F, Naderi F, Honarparvar B. A theoretical thermochemical study of solute-solvent dielectric effects in the displacement of codon-anticodon base pairs. Russ J Phys Chem A 2008. [DOI: 10.1134/s0036024408130207] [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] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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28
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Monajjemi M, Rajaeian E, Mollaamin F, Naderi F, Saki S. Investigation of NMR shielding tensors in 1,3 dipolar cycloadditions: solvents dielectric effect. Physics and Chemistry of Liquids 2008. [DOI: 10.1080/00319100601124369] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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29
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Dlaska C, Naderi F, Nobile A. [The remarkable hypertension of Mr. B]. Praxis (Bern 1994) 2007; 96:1083-5. [PMID: 17655079 DOI: 10.1024/1661-8157.96.27.1083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Affiliation(s)
- C Dlaska
- Faculté de biologie et de médecine, Université de Lausanne.
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Abstract
The interaction of two water soluble phthalocyanines, cobalt(II) 4,4 ,4 ,4 -tetrasulfo-phthalocyanine (CoTsPc) and iron(II) 4,4 ,4 ,4 -tetrasulfo-phthalocyanine (FeTsPc), and one water soluble porphyrin, tetra sodium meso-tetrakis(p-sulfophenyl)porphyrin (TSPP), with calf thymus DNA has been studied by UV-Vis spectroscopy at five different temperatures (20, 25, 30, 35, and 40 degrees C). The optical absorption spectra of these materials were analyzed to obtain binding constants and stoichiometries using SQUAD software. The results show that the best fitting corresponds to a 1 : 1 complex model between a base pair of DNA and these materials. All of the studied porphyrin and phthalocyanines showed strong electrolyte effect, and increasing NaCl concentration induced self-aggregation of these materials.
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Affiliation(s)
- M Monajjemi
- Science and Research Campus, Islamic Azad University, Tehran, Iran.
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31
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Monajjemi M, Sayyadia R, Ghasemi G, Lalateh K, Nouria A, Naderi F. Bond Energies and Phosphate-Coordination of Magnesium Hydrate to Pyrimidine Nucleotide 5'- Monophosphates (CMP, UMP, dTMP) and NMR Shielding Tensors. Main Group Metal Chemistry 2005. [DOI: 10.1515/mgmc.2005.28.5.247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
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32
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Rapp D, Naderi F, Neugebauer M, Sevilla D, Sweetnam D, Burnett D, Wiens R, Smith N, Clark B, McComas D, Stansbery E. The Suess-Urey mission (return of solar matter to Earth). Acta Astronaut 1996; 39:229-238. [PMID: 11540763 DOI: 10.1016/s0094-5765(96)00140-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The Suess-Urey (S-U) mission has been proposed as a NASA Discovery mission to return samples of matter from the Sun to the Earth for isotopic and chemical analyses in terrestrial laboratories to provide a major improvement in our knowledge of the average chemical and isotopic composition of the solar system. The S-U spacecraft and sample return capsule will be placed in a halo orbit around the L1 Sun-Earth libration point for two years to collect solar wind ions which implant into large passive collectors made of ultra-pure materials. Constant Spacecraft-Sun-Earth geometries enable simple spin stabilized attitude control, simple passive thermal control, and a fixed medium gain antenna. Low data requirements and the safety of a Sun-pointed spinner, result in extremely low mission operations costs.
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Affiliation(s)
- D Rapp
- Jet Propulsion Laboratory, USA
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Abstract
When low contrast photographic images are digitized by a very small aperture, extreme film-grain noise almost completely obliterates the image information. Using a large aperture to average out the noise destroys the fine details of the image. In these situations conventional statistical restoration techniques have little effect, and well chosen heuristic algorithms have yielded better results. In this paper we analyze the noisecheating algorithm of Zweig et al. [J. Opt. Soc. Am. 65, 1347 (1975)] and show that it can be justified by classical maximum-likelihood detection theory. A more general algorithm applicable to a broader class of images is then developed by considering the signal-dependent nature of film-grain noise. Finally, a Bayesian detection algorithm with improved performance is presented.
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Abstract
Film-grain noise describes the intrinsic noise produced by a photographic emulsion during the process of image recording and reproduction. In this paper we consider the restoration of images degraded by film-grain noise. First a detailed model for the over-all photographic imaging system is presented. The model includes linear blurring effects and the signal-dependent effect of film-grain noise. The accuracy of this model is tested by simulating images according to it and comparing the results to images of similar targets that were actually recorded on film. The restoration of images degraded by film-grain noise is then considered in the context of estimation theory. A discrete Wiener filer is developed which explicitly allows for the signal dependence of the noise. The filter adaptively alters its characteristics based on the nonstationary first order statistics of an image and is shown to have advantages over the conventional Wiener filter. Experimental results for modeling and the adaptive estimation filter are presented.
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