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Saeedian A, Tabatabaei FS, Azimi A, Babaei M, Lashkari M, Esmati E, Abiar Z, Moadabshoar L, Sandoughdaran S, Kamrava M, Amini A, Ghalehtaki R. PErspective and current status of Radiotherapy Service in IRan (PERSIR)-1 study: assessment of current external beam radiotherapy facilities, staff and techniques compared to the international guidelines. BMC Cancer 2024; 24:324. [PMID: 38459443 PMCID: PMC10921664 DOI: 10.1186/s12885-024-12078-z] [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: 10/16/2023] [Accepted: 03/04/2024] [Indexed: 03/10/2024] Open
Abstract
BACKGROUND AND PURPOSE Radiotherapy (RT) is an essential treatment modality against cancer and becoming even more in demand due to the anticipated increase in cancer incidence. Due to the rapid development of RT technologies amid financial challenges, we aimed to assess the available RT facilities and the issues with achieving health equity based on current equipment compared to the previous reports from Iran. MATERIALS AND METHODS A survey arranged by the Iran Cancer Institute's Radiation Oncology Research Center (RORC) was sent to all of the country's radiotherapy centers in 2022. Four components were retrieved: the reimbursement type, equipment, human resources, and patient load. To calculate the radiotherapy utilization rate (RUR), the Lancet Commission was used. The findings were compared with the previous national data. RESULTS Seventy-six active radiotherapy centers with 123 Linear accelerators (LINACs) were identified. The centers have been directed in three ways. 10 (20 LINACs), 36 (50 LINACs), and 30 centers (53 LINACs) were charity-, private-, and public-based, respectively. Four provinces had no centers. There was no active intraoperative radiotherapy machine despite its availability in 4 centers. One orthovoltage X-ray machine was active and 14 brachytherapy devices were treating patients. There were 344, 252, and 419 active radiation oncologists, medical physicists, and radiation therapy technologists, respectively. The ratio of LINAC and radiation oncologists to one million populations was 1.68 and 4.10, respectively. Since 2017, 35±5 radiation oncology residents have been trained each year. CONCLUSION There has been a notable growth in RT facilities since the previous reports and Iran's situation is currently acceptable among LMICs. However, there is an urgent need to improve the distribution of the RT infrastructure and provide more facilities that can deliver advanced techniques.
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Affiliation(s)
- Arefeh Saeedian
- Radiation Oncology Research Center, Cancer Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Fatemeh-Sadat Tabatabaei
- Radiation Oncology Research Center, Cancer Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Amirali Azimi
- Radiation Oncology Research Center, Cancer Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammad Babaei
- Department of Radiation Oncology, Cancer Institute, IKHC, Tehran University of Medical Sciences, Tehran, Iran
| | - Marzieh Lashkari
- Radiation Oncology Research Center, Cancer Research Institute, Tehran University of Medical Sciences, Tehran, Iran
- Department of Radiation Oncology, Cancer Institute, IKHC, Tehran University of Medical Sciences, Tehran, Iran
| | - Ebrahim Esmati
- Radiation Oncology Research Center, Cancer Research Institute, Tehran University of Medical Sciences, Tehran, Iran
- Department of Radiation Oncology, Cancer Institute, IKHC, Tehran University of Medical Sciences, Tehran, Iran
| | - Zeinab Abiar
- Radiation Oncology Research Center, Cancer Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Leila Moadabshoar
- Radiation Oncology Research Center, Cancer Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | | | - Mitchell Kamrava
- Radiation Oncology Research Center, Cancer Research Institute, Tehran University of Medical Sciences, Tehran, Iran
- Department of Radiation Oncology, Cedars Sinai Medical Center, Los Angeles, CA, 90048, USA
| | - Arya Amini
- Department of Radiation Oncology, City of Hope National Medical Center, Duarte, CA, 91010, USA
| | - Reza Ghalehtaki
- Radiation Oncology Research Center, Cancer Research Institute, Tehran University of Medical Sciences, Tehran, Iran.
- Radiation Oncology Research Center, Radio-Oncology Ward, Cancer Institute, Keshavarz Blvd, Qarib Street, Tehran, Iran.
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Azimi A, Dizaji SR, Tabatabaei FS, Safari S, Nakhaei Amroodi M, Azimi AF. Effect of Postoperative Kinesio Taping on Knee Edema, Pain, and Range of Motion After Total Knee Arthroplasty and Anterior Cruciate Ligament Reconstruction: A Systematic Review and Meta-analysis of Randomized Clinical Trials. JBJS Rev 2024; 12:01874474-202403000-00011. [PMID: 38489396 DOI: 10.2106/jbjs.rvw.23.00221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/17/2024]
Abstract
BACKGROUND Kinesio taping (KT) has been shown to be clinically effective in a wide range of musculoskeletal disorders. Despite evidence supporting KT, there still needs to be more certainty regarding its clinical worthiness in managing postoperative conditions. This study aims to assess the effect of postoperative KT on knee edema, pain, and range of motion (ROM) when added to routine physiotherapy after knee surgery. METHODS In this systematic review and meta-analysis, MEDLINE, Embase, Scopus, Web of Science, and CENTRAL databases were searched from their inception to July 2023. Randomized controlled trials (RCTs) comparing routine physiotherapy with and without KT were included. Random-effect models were used to calculate the standardized mean difference (SMD), confidence interval, and heterogeneity (I2). RESULTS Sixteen RCTs on 842 operated knees were included. KT reduced knee edema in first week (SMD, -0.59, p < 0.001), 14th postoperative day (POD) (SMD, -0.78, p < 0.001), and 28 to 42 days postop (SMD, -0.66, p < 0.001). The KT demonstrated significant pain improvement in second week (SMD, -0.87, p < 0.001) and the fourth week (SMD, -0.53, p < 0.001). The KT groups demonstrated ROM improvement within second week (SMD, 0.69, p = 0.010) and in the 28th POD (SMD, 0.89, p = 0.009). Subgroup analysis demonstrated minimal heterogeneity in anterior cruciate ligament reconstruction (ACLR) cases. However, it did not show significant superiority regarding ankle, calf, or thigh edema and Lysholm scale. CONCLUSION This study suggests that adding KT to routine postoperative physiotherapy reduces pain and knee edema after total knee arthroplasty or ACLR. Low to very low certainty of evidence for all outcomes and the limited number of studies emphasize the need for more high-quality primary studies to explore the optimal method of KT application and its effectiveness in specific knee surgeries. LEVEL OF EVIDENCE Level I. See Instructions for Authors for a complete description of levels of evidence.
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Affiliation(s)
- Amirali Azimi
- Department of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Shayan Roshdi Dizaji
- Men's Health and Reproductive Health Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | | | - Saeed Safari
- Men's Health and Reproductive Health Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Morteza Nakhaei Amroodi
- Bone and Joint Reconstruction Research Center, Shafa Orthopedic Hospital, Iran University of Medical Sciences, Tehran, Iran
| | - Amir Farbod Azimi
- Department of Medicine, Tehran University of Medical Sciences, Tehran, Iran
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Delbari A, Tabatabaei F, Ghasemi H, Azimi A, Bidkhori M, Saatchi M, Foroughan M, Hooshmand E. Prevalence and associated factors of mild cognitive impairment among middle-aged and older adults: Results of the first phase of Ardakan Cohort Study on Aging. Health Sci Rep 2024; 7:e1827. [PMID: 38264157 PMCID: PMC10803666 DOI: 10.1002/hsr2.1827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 12/19/2023] [Accepted: 01/04/2024] [Indexed: 01/25/2024] Open
Abstract
Background and Aims Data on mild cognitive impairment (MCI) in low- to middle-income countries are still being determined, despite the fact that most future older adults are expected to reside in these regions. This study aimed to investigate the prevalence and associated factors of MCI in Iran. Methods A cross-sectional study was conducted on 4938 community-dwelling subjects aged 50 years or above in the first wave of the Ardakan Cohort Study on Aging. MCI was evaluated using the Mini-Mental State Examination (MMSE) and the Abbreviated Mental Test Score (AMTS) in literate and illiterate individuals. The relationship between factors associated with the odds of MCI was assessed through logistic regression. Results The prevalence of MCI among all participants, the literates and illiterates, was 15.8%, 6.3%, and 36.4%, respectively. It was found that failure to accomplish any of the MMSE or AMTS items was significantly related to MCI (p < 0.001). Age ([odds ratio (OR): 1.05; p < 0.001 in the literates], [OR: 1.06; p < 0.001 in the illiterates]), sex (OR: 0.13; p < 0.001 in the illiterates), history of stroke ([OR: 2.86; p = 0.006 in the literates], [OR: 2.04; p = 0.045 in the illiterates]), and depression ([OR: 1.87; p < 0.001 in the literates], [OR: 1.41; p = 0.008 in the illiterates]) were significantly associated with MCI. Conclusion This study highlights the significant associations between age, education, depression, stroke, and MCI in Iranian participants. These findings emphasize the need for targeted interventions in low-literacy populations, mental health screening, and stroke prevention strategies to mitigate the burden of MCI and enhance cognitive health.
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Affiliation(s)
- Ahmad Delbari
- Iranian Research Center on AgingUniversity of Social Welfare and Rehabilitation SciencesTehranIran
| | - Fatemeh‐Sadat Tabatabaei
- Iranian Research Center on AgingUniversity of Social Welfare and Rehabilitation SciencesTehranIran
| | - Hoomaan Ghasemi
- School of MedicineTehran University of Medical SciencesTehranIran
| | - Amirali Azimi
- Iranian Research Center on AgingUniversity of Social Welfare and Rehabilitation SciencesTehranIran
| | - Mohammad Bidkhori
- Iranian Research Center on AgingUniversity of Social Welfare and Rehabilitation SciencesTehranIran
| | - Mohammad Saatchi
- Department of Biostatistics and EpidemiologyUniversity of Social Welfare and Rehabilitation ScienceTehranIran
- Health in Emergency and Disaster Research CenterUniversity of Social Welfare and Rehabilitation SciencesTehranIran
| | - Mahshid Foroughan
- Iranian Research Center on AgingUniversity of Social Welfare and Rehabilitation SciencesTehranIran
| | - Elham Hooshmand
- Iranian Research Center on AgingUniversity of Social Welfare and Rehabilitation SciencesTehranIran
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Delbari A, Azimi A, Najafi M, Saatchi M, Bidkhori M, Mousavi ME, Tabatabaei FS, Hooshmand E. Prevalence, Complications, and Risk Factors of Falls and Fear of Falling Among Older Adults; Based on Ardakan Cohort Study on Aging (ACSA). Arch Acad Emerg Med 2023; 12:e9. [PMID: 38162387 PMCID: PMC10757572 DOI: 10.22037/aaem.v12i1.2084] [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] [Subscribe] [Scholar Register] [Indexed: 01/03/2024]
Abstract
Introduction The objective of this study was to assess the prevalence of falls, fear of falling (FOF), complications arising from falls, and identify possible sociodemographic and health-related factors associated with these outcomes among older adults. Methods This cross-sectional study was based on the first wave of the Ardakan Cohort Study on Aging (ACSA), which includes participants over 50 years of age residing in Ardakan, Iran. Fall history, number of fall events, FOF, hospitalizations, and fractures in the past 12 months were assessed through a face-to-face interview. Health-related factors were recorded on a self-expressed basis. Associations were assessed using multiple logistic regression. Results Among the 4,990 participants, fall history in the past 12 months was prevalent in 19.9%, with 10.1% reporting more than two fall events. Women (p < 0.001) and older participants (p< 0.001) had a higher prevalence. In females, 28.8% reported moderate to severe FOF, while 21% experienced disruptions in their daily activities as a result of this fear. The prevalence of fractures following falls was 5.1% in males and 8.6% in females. After adjusting for confounding factors, FOF (OR: 1.59, 95% CI: 1.33-1.91, p<0.001), imbalance (OR: 2.45, 95% CI: 1.68-3.58, p<0.001), urinary incontinence (OR: 1.44, 95% CI: 1.04-1.9, p=0.025), cognitive impairment (OR: 1.21, 95% CI: 1.01-1.46, p=0.049), vertigo or dizziness (OR: 1.39, 95% CI: 1.15-1.68, p<0.001), osteoporosis (OR: 1.24, 95% CI: 1.03-1.50, p=0.023), osteoarthritis (OR: 1.33, 95% CI: 1.13-1.56, p=0.001), depression (OR: 1.30, 95% CI: 1.06-1.60, p=0.010), and Central Nervous System (CNS)-affecting diseases (OR: 1.99, 95% CI: 1.33-2.97, p=0.001) were found to have positive associations with falls. Conclusion This study showed that about one-fifth of those over 50 in Iran have experienced at least one fall within a year. Self-expressed imbalance, FOF, and urinary incontinence were the most prominent risk factors. Due to resulting in hospitalization and fractures, falls also lead to fear of falling and the associated limitation of activities.
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Affiliation(s)
- Ahmad Delbari
- Iranian Research Center on Aging, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
| | - Amirali Azimi
- Iranian Research Center on Aging, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
| | - Morvarid Najafi
- Department of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammad Saatchi
- Department of Biostatistics and Epidemiology, University of Social Welfare and Rehabilitation Science, Tehran, Iran
- Health in Emergency and Disaster Research Center, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
| | - Mohammad Bidkhori
- Iranian Research Center on Aging, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
| | - Mohammad Ebrahim Mousavi
- Department of Orthotics and Prosthetics, School of Rehabilitation, University ofSocial Welfare and Rehabilitation Sciences, Tehran, Iran
| | - Fatemeh-sadat Tabatabaei
- Iranian Research Center on Aging, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
| | - Elham Hooshmand
- Iranian Research Center on Aging, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
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Azimi A, Hooshmand E, Mafi AA, Tabatabaei FS. Effect of duloxetine on opioid consumption and pain after total knee and hip arthroplasty: a systematic review and meta-analysis of randomized clinical trials. Pain Med 2023; 24:1035-1045. [PMID: 37027215 DOI: 10.1093/pm/pnad045] [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] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 03/27/2023] [Accepted: 04/04/2023] [Indexed: 04/08/2023]
Abstract
OBJECTIVES The purpose of this study was to investigate the analgesic effects of duloxetine, specifically on postoperative pain, opioid consumption, and related side effects following total hip or knee arthroplasty. METHODS In this systematic review and meta-analysis, Medline, Cochrane, EMBASE, Scopus, and Web of Science were searched until November 2022 for studies which compared duloxetine with placebo when added to routine pain management protocols. Individual study risk of bias assessment was conducted based on Cochrane risk of bias tool 2. Random effect model meta-analysis was done on mean differences, to evaluate the outcomes. RESULTS Nine randomized clinical trials (RCT) were included in the final analysis, totaling 806 patients. Duloxetine reduced opioid consumption (oral morphine milligram equivalents) on postoperative days (POD) 2 (mean difference (MD): -14.35, P = .02), POD 3 (MD: -13.6, P < .001), POD 7 (MD: -7.81, P < .001), and POD 14 (MD: -12.72, P < .001). Duloxetine decreased pain with activity on POD 1, 3, 7, 14, 90 (All P < .05), and pain at rest on POD 2, 3, 7, 14, and 90 (all P < .05). There was no significant difference in the prevalence of the side effects, except for increased risk of somnolence/drowsiness (risk ratio: 1.87, P = .007). CONCLUSION Current evidence shows low to moderate opioid sparing effects of perioperative duloxetine and a statistically but not clinically significant reduction in pain scores. Patients treated with duloxetine had an increased risk for somnolence and drowsiness.
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Affiliation(s)
- Amirali Azimi
- Department of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Elham Hooshmand
- Iranian Research Center on Aging, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
| | - Amir Ali Mafi
- Anesthesiology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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Azimi A, Tabatabaei FS, Azimi A, Mazloom H, Foruzanfar MM, Mahdavi NS. Intra-Operative Adjunctive Magnesium Sulfate in Pain Management of Total Knee Arthroplasty; a Systematic Review and Meta-analysis. Arch Acad Emerg Med 2023; 11:e58. [PMID: 37671273 PMCID: PMC10475748 DOI: 10.22037/aaem.v11i1.2058] [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] [Indexed: 09/07/2023]
Abstract
Introduction There has been growing interest in the potential role of adjunctive magnesium sulfate in improving pain management. This systematic review and meta-analysis aimed to assess the effect of intra-operative adjunctive magnesium sulfate on pain management and opioid consumption in total knee arthroplasty (TKA). Methods A comprehensive search was conducted in Medline, Embase, Scopus, Web of Science, and Cochrane Library databases, covering studies up to April 2023. The extracted data included pain management outcomes, opioid consumption, and adverse effects from the selected studies. Standardized mean differences (SMDs) were calculated for continuous outcomes, while risk ratios (RRs) were calculated for dichotomous outcomes. Meta-analysis was conducted employing random-effects models in STATA 17. Results In this meta-analysis of 8 randomized controlled trials involving 536 patients, adjunctive magnesium sulfate in TKA was found to significantly reduce opioid consumption during the first 24 hours after operation (SMD: -1.88, 95% confidence interval (CI): [-3.66 to -0.10]; p = 0.038). It also resulted in lower pain scores at rest 24 hours after surgery (SMD: -1.53, 95% CI: [-2.70 to -0.37]; p = 0.010). There were no significant differences in time to first rescue analgesic and adverse effects between the groups. The included studies were assessed to have low to high levels of risk of bias. Conclusion This study presents evidence at low to moderate levels supporting the use of intra-operative adjunctive magnesium sulfate in TKA for improved pain management and reduced opioid consumption. However, further research is needed to address the heterogeneity and to explore optimal dosing regimens and routes of administration to maximize the benefits of magnesium sulfate in TKA.
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Affiliation(s)
- Amirali Azimi
- Department of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | | | - Amirfarbod Azimi
- Department of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Hamid Mazloom
- Emergency Department, Shohadaye Tajrish Hospital, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammad Mehdi Foruzanfar
- Emergency Department, Shohadaye Tajrish Hospital, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Nastaran Sadat Mahdavi
- Department of Pediatric Anesthesiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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Tabatabaei FS, Azimi A, Tabatabaei SS, Pakdaman H. Recovery of Acute Ophthalmoplegia after Hyaluronic Acid Filler Injections to the Temples: A Case Report and Review of the Literature. Arch Plast Surg 2023; 50:148-152. [PMID: 36999155 PMCID: PMC10049826 DOI: 10.1055/s-0043-1761211] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Accepted: 11/24/2022] [Indexed: 03/30/2023] Open
Abstract
Soft tissue filler injection is the second most common nonsurgical cosmetic procedure. Despite the safety of fillers, as use has grown, so has the number of patients affected by adverse events. Ophthalmoplegia following cosmetic filler injection is a rare complication, mostly occurring after injection to the glabella, nasolabial fold, periorbital, and lateral nasal site. In all cases where ophthalmoplegia has been reported following fillers, patients have simultaneously experienced vision loss and other ocular symptoms. We report a case of isolated acute ophthalmoplegia following hyaluronic acid injection solely in the temple region. A 40-year-old woman, 3 hours after the procedure, presented to our hospital with left eye ophthalmoplegia, ptosis, and hypotropia. Treatment started with hyaluronidase, steroids, and anticoagulants. After 4 weeks, left eye ophthalmoplegia remained unchanged, and through a 10-week follow-up, all left ocular movements improved, and only mild hypotropia and ptosis persisted. This case report shows that ophthalmoplegia may also happen with temple region filler injections. We also review available prevention techniques and treatments to avoid such complications when performing soft tissue fillers for gaunt appearance correction.
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Affiliation(s)
- Fatemeh-sadat Tabatabaei
- Students' Scientific Research Center (SRCC), School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Amirali Azimi
- Students' Scientific Research Center (SRCC), School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
- Address for correspondence Amirali Azimi, MD School of MedicineTehran University of Medical Sciences, Poursina St, 16 Azar St, Kesharavrz Boulevard, TehranIran
| | | | - Hossein Pakdaman
- Brain Mapping Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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Mohammadzadeh M, Kolahi S, Mehrabi Nejad MM, Firouznia K, Naghibi H, Mohammadzadeh A, Shakiba M, Mohebi F, Komaki H, Sharifian H, Hashemi H, Harirchian MH, Azimi A, Adin ME, Yousem DM. Does Gadolinium Deposition Lead to Metabolite Alteration in the Dentate Nucleus? An MRS Study in Patients with MS. AJNR Am J Neuroradiol 2022; 43:1403-1410. [PMID: 36574329 PMCID: PMC9575534 DOI: 10.3174/ajnr.a7623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Accepted: 07/01/2022] [Indexed: 01/26/2023]
Abstract
BACKGROUND AND PURPOSE Repeat contrast-enhanced MR imaging exposes patients with relapsing-remitting MS to frequent administration of gadolinium-based contrast agents. We aimed to investigate the potential metabolite and neurochemical alterations of visible gadolinium deposition on unenhanced T1WI in the dentate nucleus using MRS. MATERIALS AND METHODS This prospective study was conducted in a referral university hospital from January 2020 to July 2021. The inclusion criteria for case and control groups were as follows: 1) case: patients with relapsing-remitting MS, visible gadolinium deposition in the dentate nucleus (ribbon sign), >5 contrast-enhanced MR images obtained; 2) control 1: patients with relapsing-remitting MS without visible gadolinium deposition in the dentate nucleus, >5 contrast-enhanced MR images obtained; 3) control 2: patients with relapsing-remitting MS without visible gadolinium deposition in the dentate nucleus, <5 contrast-enhanced-MR images obtained; and 4) control 3: adult healthy individuals, with no contrast-enhanced MR imaging. Dentate nucleus and pontine single-voxel 12 × 12 × 12 MRS were analyzed using short TEs. RESULTS Forty participants (10 per group; 27 [67.5%] female; mean age, 35.6 [SD, 9.6] years) were enrolled. We did not detect any significant alteration in the levels of NAA and choline between the studied groups. The mean concentrations of mIns were 2.7 (SD, 0.73) (case), 1.5 (SD, 0.8) (control 1), 2.4 (SD, 1.2) (control 2), and 1.7 (SD, 1.2) (control 3) (P = .04). The mean concentration of Cr and mIns (P = .04) and the relative metabolic concentration (dentate nucleus/pons) of lipid 1.3/Cr (P = .04) were significantly higher in the case-group than in healthy individuals (controls 1-3). Further analyses compared the case group with cumulative control 1 and 2 groups and showed a significant increase in lactate (P = .02), lactate/Cr (P = .04), and Cr (dentate nucleus/pons) (P = .03) in the case group. CONCLUSIONS Although elevated concentrations of Cr, lactate, mIns, and lipid in the dentate nucleus of the case group indicate a metabolic disturbance, NAA and choline levels were normal, implying no definite neuronal damage.
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Affiliation(s)
- M Mohammadzadeh
- From the Departments of Radiology (M.M., S.K., M.-M.M.N., K.F., H.N., M.S., H.S., H.H.)
| | - S Kolahi
- From the Departments of Radiology (M.M., S.K., M.-M.M.N., K.F., H.N., M.S., H.S., H.H.)
| | - M-M Mehrabi Nejad
- From the Departments of Radiology (M.M., S.K., M.-M.M.N., K.F., H.N., M.S., H.S., H.H.)
| | - K Firouznia
- From the Departments of Radiology (M.M., S.K., M.-M.M.N., K.F., H.N., M.S., H.S., H.H.)
| | - H Naghibi
- From the Departments of Radiology (M.M., S.K., M.-M.M.N., K.F., H.N., M.S., H.S., H.H.)
| | - A Mohammadzadeh
- Department of Radiology (A.M.), Iran University of Medical Sciences, Tehran, Iran
| | - M Shakiba
- From the Departments of Radiology (M.M., S.K., M.-M.M.N., K.F., H.N., M.S., H.S., H.H.)
| | - F Mohebi
- Hass School of Business (F.M.), University of California, Berkeley, Berkeley, California
| | - H Komaki
- Khoury College of Computer Sciences (H.K.), Northeastern University, Boston, Massachusetts
| | - H Sharifian
- From the Departments of Radiology (M.M., S.K., M.-M.M.N., K.F., H.N., M.S., H.S., H.H.)
| | - H Hashemi
- From the Departments of Radiology (M.M., S.K., M.-M.M.N., K.F., H.N., M.S., H.S., H.H.)
| | - M H Harirchian
- Neurology (M.H.H., A.A.), Tehran University of Medical Sciences, Tehran, Iran
| | - A Azimi
- Neurology (M.H.H., A.A.), Tehran University of Medical Sciences, Tehran, Iran
| | - M E Adin
- Department of Radiology and Biomedical Imaging (M.E.A.), Yale School of Medicine, New Haven, Connecticut
| | - D M Yousem
- Department of Radiology (D.M.Y.), Johns Hopkins University School of Medicine, Baltimore, Maryland
- Department of Radiology (D.M.Y.), Johns Hopkins University School of Medicine, Baltimore, Maryland
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Alizadeh N, Tabatabaei FS, Azimi A, Faraji N, Akbarpour S, Dianatkhah M, Moghaddas A. Lactate Dehydrogenase to Albumin ratio as a Predictive Factor of COVID-19 Patients' Outcome; a Cross-sectional Study. Arch Acad Emerg Med 2022; 10:e63. [PMID: 36033986 PMCID: PMC9397596 DOI: 10.22037/aaem.v10i1.1646] [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] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
INTRODUCTION Despite the increasing vaccination coverage, COVID-19 is still a concern. With the limited health care capacity, early risk stratification is crucial to identify patients who should be prioritized for optimal management. The present study investigates whether on-admission lactate dehydrogenase to albumin ratio (LAR) can be used to predict COVID-19 outcomes. METHODS This retrospective cross-sectional study evaluated hospitalized COVID-19 patients in an academic referral center in Iran from May 2020 to October 2020. The area under the receiver operating characteristic (ROC) curve (AUC) was used to evaluate the value of LAR in the prediction of mortality. The Yuden index was used to find the optimal cut-off of LAR to distinguish severity. Patients were classified into three groups (LAR tertiles), first: LAR<101.46, second: 101.46≤LAR< 148.78, and third group: LAR≥148.78. Logistic regression analysis was used to identify the association between tertiles of LAR, as well as the relationship between each one-unit increase in LAR with mortality and ICU admission in three models, based on potential confounding variables. RESULTS A total of 477 patients were included. Among all patients, 100 patients (21%) died, and 121 patients (25.4%) were admitted to intensive care unit (ICU). In the third group, the risk of mortality and ICU admission increased 7.78 times (OR=7.78, CI: 3.95-15.26; p <0.0001) and 4.49 times (OR=4.49, CI: 2.01-9.04; p <0.0001), respectively, compared to the first group. The AUC of LAR for prediction of mortality was 0.768 (95% CI 0.69- 0.81). LAR ≥ 136, with the sensitivity and specificity of 72% (95%CI: 62.1-80.5) and 70% (95%CI: 64.9-74.4), respectively, was the optimal cut-off value for predicting mortality. CONCLUSION High LAR was associated with higher odds of COVID-19 mortality, ICU admission, and length of hospitalization. On-admission LAR levels might help health care workers identify critical patients early on.
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Affiliation(s)
- Nafiseh Alizadeh
- Department of Pharmaceutical Care, Baharlou Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | | | - Amirali Azimi
- Men's Health and Reproductive Health Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.,Corresponding author: Amirali Azimi; Men's Health and Reproductive Health Research Center, Shohada Tajrish Hospital, Tehran, Iran. , Tel: (+98) 910 140 7012
| | - Neda Faraji
- Department of Internal Medicine, Baharlou Hospital, Tehran University of Medical Sciences, Tehran, Iran.,Second Corresponding author: Neda Faraji; Department of Internal Medicine, Baharlou Hospital, Tehran University of Medical Sciences, Tehran, Iran. , Tel: (+98) 919 268 6990
| | - Samaneh Akbarpour
- Occupational Sleep Research Center, Baharlou Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Mehrnoush Dianatkhah
- Department of Clinical Pharmacy, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Azadeh Moghaddas
- Department of Clinical Pharmacy and Pharmacy Practice, School of Pharmacy and Pharmaceutical Sciences, Cancer Prevention Research Center, Seyyed Al-Shohada Hospital, Isfahan University of Medical Sciences, Isfahan, Iran
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Tabatabaei FS, Saeedian A, Azimi A, Kolahdouzan K, Esmati E, Maddah Safaei A. Evaluation of Survival Rate and Associated Factors in Patients with Cervical Cancer: A Retrospective Cohort Study. J Res Health Sci 2022; 22:e00552. [PMID: 36511264 PMCID: PMC9818038 DOI: 10.34172/jrhs.2022.87] [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] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2022] [Revised: 06/14/2022] [Accepted: 06/16/2022] [Indexed: 01/16/2023] Open
Abstract
BACKGROUND Cervical cancer, the most common gynecological cancer, is a matter of concern, especially in developing countries. The present study investigates survival rates, associated factors, and post-treatment follow-up status in cervical cancer patients. STUDY DESIGN A retrospective cohort study. METHODS This study was conducted on 187 patients referred to an academic referral cancer center in Iran from 2014-2020. Overall survival (OS) and event-free survival (EFS) were evaluated using Kaplan Meyer analysis. The event was defined as recurrence, metastasis, or death. RESULTS The patients came for post-treatment visits for a median of 36 months (interquartile range [IQR]: 18-51). The median OS and EFS were 24 and 18 months, respectively. The 1- and 3- year OS rates were 90% and 72%, respectively. The 1- and 3- year EFS rates were 76% and 61%, respectively. Stage ≥ III (hazard ratio [HR]: 3.1, 95% confidence interval [CI]: 1.5, 6.5, P < 0.001) and tumor size > 4 cm (HR: 2.5, 95% CI: 1.2, 4.9, P = 0.006) predicted lower OS. The most common histopathology was squamous cell carcinoma (SCC) (71.1%) with non-significant higher 3- year OS (HR: 0.62, 95% CI: 0.33, 1.16, P = 0.13). No significant difference in OS was found between adjuvant and definitive radiotherapy in both early and advance-staged patients (Log-rank = 0.7 P = 0.4, log-rank = 1.6, P = 0.2, respectively). CONCLUSION As evidenced by the obtained results, the survival of patients was lower compared to that in developed countries. Higher stage and tumor size led to shorter survival. The histopathology and type of treatment in comparable stages did not have any significant impact on survival.
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Affiliation(s)
- Fatemeh-Sadat Tabatabaei
- Radiation Oncology Research Center, Cancer Research Institute, Tehran University of Medical Sciences, Tehran, Iran,School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Arefeh Saeedian
- Radiation Oncology Research Center, Cancer Research Institute, Tehran University of Medical Sciences, Tehran, Iran,Department of Radiation Oncology, Cancer Institute, Imam Khomeini Hospital Complex, Tehran University of Medical Sciences, Tehran, Iran
| | - Amirali Azimi
- Radiation Oncology Research Center, Cancer Research Institute, Tehran University of Medical Sciences, Tehran, Iran,School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Kasra Kolahdouzan
- Radiation Oncology Research Center, Cancer Research Institute, Tehran University of Medical Sciences, Tehran, Iran,Department of Radiation Oncology, Cancer Institute, Imam Khomeini Hospital Complex, Tehran University of Medical Sciences, Tehran, Iran
| | - Ebrahim Esmati
- Radiation Oncology Research Center, Cancer Research Institute, Tehran University of Medical Sciences, Tehran, Iran,Department of Radiation Oncology, Cancer Institute, Imam Khomeini Hospital Complex, Tehran University of Medical Sciences, Tehran, Iran,Corresponding author: Ebrahim Esmati (MD) Tel:+98 912 688 0306 Fax:+98 21 6694 8672
| | - Afsaneh Maddah Safaei
- Radiation Oncology Research Center, Cancer Research Institute, Tehran University of Medical Sciences, Tehran, Iran,Department of Radiation Oncology, Cancer Institute, Imam Khomeini Hospital Complex, Tehran University of Medical Sciences, Tehran, Iran
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11
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Saeedian A, Safaei AM, Azimi A, Kolahdouzan K, Tabatabaei FS, Esmati E. Implications for pelvic lymph node irradiation in definitive chemoradiotherapy of node negative muscle invasive bladder cancer based on predictive factors of clinicopathologic discrepancy. J Cancer Res Clin Oncol 2022; 149:2537-2542. [PMID: 35764702 DOI: 10.1007/s00432-022-04153-4] [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: 05/03/2022] [Accepted: 06/13/2022] [Indexed: 11/30/2022]
Abstract
PURPOSE To identify pre-surgical imaging predictive value and factors associated with the clinicopathologic discrepancy for implication of definitive pelvic radiotherapy in clinically node-negative bladder cancer. METHOD The documented data of bladder cancer patients who underwent radical cystectomy plus pelvic lymphadenectomy were collected retrospectively. Patients' characteristics, last imaging, pathology reports, disease-specific survival and overall survival were retrieved. RESULTS From 142 patients, pre-surgical imaging had a sensitivity of 76.4%, specificity of 73.7%, positive predictive value (PPV) of 94.9%, and negative predictive value (NPV) of 32.6% (p value < 0.0001) for detection of muscle invasion. Also, for detection of positive lymph nodes, imaging had a sensitivity of 31.8%, specificity of 85.7%, PPV of 50%, and NPV of 73.7% (p value: 0.022). 44.4% of study population were upstaged after surgery (24.6% associated with N-upstaging) and 18.3% were downstaged (12% associated with N-downstaging). Receipt of neoadjuvant chemotherapy and T-stage were not correlated with N-upstaging. On multivariate analysis, lymphovascular invasion (LVI) maintained its significance for independent prediction of upstaging (OR 3.3, 95% CI 1.5-7.5, p value: 0.004) and inversely with downstaging (OR 0.34, 95% CI 0.12-0.96, p value: 0.04). Older age (OR 1.03, 95% CI 1.0-1.05, p value 0.047), positive margins (OR 2.1, 95% CI 1.2-3.8, p value 0.011), presence of LVI (OR 2.5, 95% CI 1.4-4.7, p value 0.003), perineural invasion (OR 2.0, 95% CI 1.2-3.4, p value 0.013), and lymph node ratio (OR 1.011, 95% CI 1.001-1.021, p value 0.03) were associated with worse survival. Also, N-upstaging independently predicted a worse survival after controlling for surgical pathology stage (OR 2.3, 95% CI 1.2-4.5, p value 0.011). CONCLUSIONS The optimal target volume in definitive chemoradiotherapy of node-negative bladder cancer patients remains to be established. Since then, customizing the treatment is considered especially for positive LVI in TURBT specimen.
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Affiliation(s)
- Arefeh Saeedian
- Radiation Oncology Research Center, Cancer Research Institute, Tehran University of Medical Sciences, Tehran, Iran.,Department of Radiation Oncology, Cancer Institute, Imam Khomeini Hospital Complex, Tehran University of Medical Sciences, Qarib Street, Keshavarz Blvd., Tehran, Iran
| | - Afsaneh Maddah Safaei
- Radiation Oncology Research Center, Cancer Research Institute, Tehran University of Medical Sciences, Tehran, Iran. .,Department of Radiation Oncology, Cancer Institute, Imam Khomeini Hospital Complex, Tehran University of Medical Sciences, Qarib Street, Keshavarz Blvd., Tehran, Iran.
| | - Amirali Azimi
- Radiation Oncology Research Center, Cancer Research Institute, Tehran University of Medical Sciences, Tehran, Iran.,School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Kasra Kolahdouzan
- Radiation Oncology Research Center, Cancer Research Institute, Tehran University of Medical Sciences, Tehran, Iran.,Department of Radiation Oncology, Cancer Institute, Imam Khomeini Hospital Complex, Tehran University of Medical Sciences, Qarib Street, Keshavarz Blvd., Tehran, Iran
| | - Fatemeh-Sadat Tabatabaei
- Radiation Oncology Research Center, Cancer Research Institute, Tehran University of Medical Sciences, Tehran, Iran.,School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Ebrahim Esmati
- Radiation Oncology Research Center, Cancer Research Institute, Tehran University of Medical Sciences, Tehran, Iran.,Department of Radiation Oncology, Cancer Institute, Imam Khomeini Hospital Complex, Tehran University of Medical Sciences, Qarib Street, Keshavarz Blvd., Tehran, Iran
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12
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Alizadeh N, Tabatabaei FS, Borran M, Dianatkhah M, Azimi A, Forghani SN, Akbarpour S, Alizadeh M, Torabi S, Faraji N. Evaluation of the Possible Effect of the Influenza Vaccine on the Severity, Mortality, and Length of Hospitalization among Unvaccinated COVID-19 Patients; An Observational, Cross-Sectional Study. jpc 2022. [DOI: 10.18502/jpc.v10i1.9123] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Background: Based upon WHO (World Health Organization) Coronavirus Dashboard more than 5 million deaths worldwide have been attributed to the COVID-19 (Coronavirus Disease 2019) caused by the SARS-Cov-2 virus (Severe Acute Respiratory Syndrome Coronavirus) till November 2021. The annual flu vaccination has raised many questions about the vaccine's effects on Covid-19 outcomes. Several possible mechanisms including cross-reactivity and cross-protection have been reported to be responsible for the potential protective effect of the flu vaccine on the COVID-19 infection. This study was performed to evaluate the possible effect of the influenza vaccine on the disease severity, the mortality rate, and the length of hospitalization in COVID-19 patients.
Methods: The data of 1300 patients were recorded from May 2020 to October 2020. Patients with a previous history of COVID-19, patients under 18 years old, and patients who did not have accurate information about their influenza vaccination history were excluded. 498 hospitalized unvaccinated COVID-19 patients with typical clinical manifestations and a positive PCR (Polymerase Chain Reaction) test for COVID-19 were included in this observational, cross-sectional study. The participants were divided into two groups (vaccinated and unvaccinated) based on the history of influenza vaccination at the time of admission.
Results: The length of hospital stay was lower in the vaccinated compared to the unvaccinated group (p < 0.05). However, there was no significant difference between the mortality rate, the need for ICU (Intensive Care Unit) admission, and the severity of the disease between the two groups (p> 0.05).
Conclusion: Since the patients studied in this article did not receive any of the Covid-19 vaccines; Therefore, the effect of influenza vaccination on the clinical course of Covid-19 can be evaluated using the results of this study. A longer length of hospital stay was observed in the unvaccinated patients in our study, which may suggest the possible protective effect of the influenza vaccine against COVID-19.
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13
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Ghadiri F, Eskandarieh S, Sahraian MA, Azimi A, Moghadasi AN. Late-onset neuromyelitis optica spectrum disorder: A case series from Iran. Rev Neurol (Paris) 2021; 178:249-252. [PMID: 34776261 DOI: 10.1016/j.neurol.2021.08.006] [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: 05/30/2021] [Revised: 07/17/2021] [Accepted: 08/27/2021] [Indexed: 10/19/2022]
Abstract
INTRODUCTION Neuromyelitis optica spectrum disorder (NMOSD) is a disabling autoimmune disease of the central nervous system that can start at ages of 50 or more, when it is called late-onset NMOSD (LO-NMOSD). Data on this disorder are sparse. In this cross-sectional study, patient characteristics of the disease were studied. LO-NMOSD patients of a tertiary center in Tehran were studied from 2016 to 2020. CASE REPORTS Eight patients were identified, half of whom were men. The diagnostic delay was from no time-lapse to three years (mean: 0.62, SD: 1.06), which was significantly shorter than in early-onset patients. Seven patients (87.5%) tested positive for AQP4-IgG which was significantly higher compared to early-onset patients (p-value=0.01). Four patients (50%) had both transverse myelitis and optic neuritis as presenting symptoms, while three (38%) had just myelitis and only one (12%) had optic neuritis. CONCLUSION There is discrepancy regarding different aspects of LO-NMOSD. Further studies are needed to clarify the subject in order to enhance diagnosis and treatment.
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Affiliation(s)
- F Ghadiri
- Multiple Sclerosis Research Center, Neuroscience Institute, Sina Hospital, Tehran University of Medical Sciences, Hasan Abad Sq, Tehran, Iran
| | - S Eskandarieh
- Multiple Sclerosis Research Center, Neuroscience Institute, Sina Hospital, Tehran University of Medical Sciences, Hasan Abad Sq, Tehran, Iran
| | - M A Sahraian
- Multiple Sclerosis Research Center, Neuroscience Institute, Sina Hospital, Tehran University of Medical Sciences, Hasan Abad Sq, Tehran, Iran
| | - A Azimi
- Multiple Sclerosis Research Center, Neuroscience Institute, Sina Hospital, Tehran University of Medical Sciences, Hasan Abad Sq, Tehran, Iran
| | - A N Moghadasi
- Multiple Sclerosis Research Center, Neuroscience Institute, Sina Hospital, Tehran University of Medical Sciences, Hasan Abad Sq, Tehran, Iran.
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14
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Kardan-Yamchi J, Hajihasani A, Talebi M, Khodaparast S, Azimi A, Rahbar M, Fallah F, Douraghi M. Intra-hospital dissemination of clinical and environmental isolates of Stenotrophomonas maltophilia from Tehran. Lett Appl Microbiol 2020; 72:325-331. [PMID: 33064916 DOI: 10.1111/lam.13416] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Revised: 10/11/2020] [Accepted: 10/12/2020] [Indexed: 11/29/2022]
Abstract
Stenotrophomonas maltophilia isolates are responsible for various hospital-acquired infections and are particularly increasing in the immunocompromised patients. The aim of this study was to determine the clonal relatedness between S. maltophilia isolates originating from the clinic and environment. A total of 150 S. maltophilia isolates from patients and 1108 environmental samples obtained in three hospitals from Tehran. Following molecular identification targeting 23S rRNA gene, the clonal relatedness of the environmental and clinical isolates was determined using pulsed field gel electrophoresis (PFGE). Of the 150 clinical and 18 environmental isolates identified using phenotypic tests, the speciation of 120 and 15 was confirmed by targeting the 23S rRNA gene. The 24 common pulsotypes (PTs) and 32 single PTs were identified by PFGE. Only a small cluster was shared among the clinic and environment within a hospital; therefore, the intra-hospital dissemination of certain isolates of S. maltophilia among the clinic and environment was demonstrated.
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Affiliation(s)
- J Kardan-Yamchi
- Division of Microbiology, Department of Pathobiology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - A Hajihasani
- Division of Microbiology, Department of Pathobiology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - M Talebi
- Department of Microbiology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - S Khodaparast
- Division of Microbiology, Department of Pathobiology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - A Azimi
- Division of Microbiology, Department of Pathobiology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - M Rahbar
- Department of Microbiology, Reference Health Laboratories, Ministry of Health, Tehran, Iran
| | - F Fallah
- Department of Microbiology, Faculty of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - M Douraghi
- Division of Microbiology, Department of Pathobiology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.,Food Microbiology Research Center, Tehran University of Medical Sciences, Tehran, Iran
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Alipour A, Zarinabadi S, Azimi A, Mirzaei M. Adsorptive removal of Pb(II) ions from aqueous solutions by thiourea-functionalized magnetic ZnO/nanocellulose composite: Optimization by response surface methodology (RSM). Int J Biol Macromol 2020; 151:124-135. [DOI: 10.1016/j.ijbiomac.2020.02.109] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2019] [Revised: 01/30/2020] [Accepted: 02/11/2020] [Indexed: 01/18/2023]
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Yekta A, Hashemi H, Khabazkhoob M, Ali S, Ostadimoghaddam H, Heravian J, Azimi A, Momeni-Moghaddam H. Prevalence of refractive errors and visual impairment in university students. Acta Ophthalmol 2017. [DOI: 10.1111/j.1755-3768.2017.0f007] [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: 11/29/2022]
Affiliation(s)
- A.A. Yekta
- Optometry; Mashhad University of Medical Sciences; Mahhad Iran
| | - H. Hashemi
- Noor Ophthalmology Research Center; Noor Eye Hospital; Tehran Iran
| | - M. Khabazkhoob
- Medical Surgical Nursing; School of Nursing and Midwifery; Shahid Beheshti University of Medical Sciences; Tehran Iran
| | - S.B. Ali
- Optometry; School of Paramedical Sciences; Mashhad University of Medical Sciences; Mashhad Iran
| | - H. Ostadimoghaddam
- Optometry; Refractive Errors Research Center; School of Paramedical Sciences; Mashhad University of Medical Sciences; Mashhad Iran
| | - J. Heravian
- Optometry; Refractive Errors Research Center; School of Paramedical Sciences; Mashhad University of Medical Sciences; Mashhad Iran
| | - A. Azimi
- Optometry; Refractive Errors Research Center; School of Paramedical Sciences; Mashhad University of Medical Sciences; Mashhad Iran
| | - H. Momeni-Moghaddam
- Optometry; School of Paramedical Sciences; Mashhad University of Medical Sciences; Mashhad Iran
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Hoeiom V, Yang M, Nosrati K, Azimi A, Egyhazi Brage S, Tuominen R. Investigation of AMBRA1 as a melanoma susceptibility gene. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx377.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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18
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Yekta A, Hashemi H, Khabazkhoob M, Forouzesh S, Ostadimoghaddam H, Heravian J, Azimi A, Nabovati P, Yazdani N, Yekta R. Normal values for amplitude of accommodation among a population of high school students in Iran. Acta Ophthalmol 2016. [DOI: 10.1111/j.1755-3768.2016.0256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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19
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Bayanak M, Azimi A. Investigation of activity and selectivity of redox catalysts in oxidative coupling of methane in fluidized bed reactor. J Fundam and Appl Sci 2016. [DOI: 10.4314/jfas.v8i3s.189] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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20
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Yousefi B, Shafiei-Irannejad V, Azimi A, Samadi N, Zarghami N. PPAR-gamma in overcoming kinase resistance in chronic myeloid leukemia. Cell Mol Biol (Noisy-le-grand) 2016; 62:52-55. [PMID: 27545215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2006] [Accepted: 07/21/2016] [Indexed: 06/06/2023]
Abstract
Peroxisome proliferator-activated receptor gamma (PPARγ) plays key roles in regulating cellular differentiation, proliferation and apoptosis pathways. As such, they are considered promising targets for anticancer drug development, especially for breast cancer, multiple myeloma and hematologic malignancies. Chronic myeloid leukemia (CML) is a myeloproliferative disorder arising from an oncogenic Bcr-Abl tyrosine kinase. Inhibitors of this oncogene by small molecules such as imatinib are effective only in 75% of the patient's population. One of the potential strategies to overcome this resistance is to devise combination therapy protocols with other therapeutic agents including PPAR ligands. Since PPAR ligands are potentially interesting in different hematologic malignancies, this article will review the potential of PPAR ligands for use in CML treatment.
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Affiliation(s)
- B Yousefi
- Tabriz University of Medical Sciences Department of Clinical Biochemistry and Laboratory Medicine, Faculty of Medicine Tabriz Iran
| | - V Shafiei-Irannejad
- Tabriz University of Medical Sciences Department of Clinical Biochemistry and Laboratory Medicine, Faculty of Medicine Tabriz Iran
| | - A Azimi
- Maragheh University of Medical Sciences Departmant of Basic Sciences Maragheh Iran
| | - N Samadi
- Tabriz University of Medical Sciences Department of Clinical Biochemistry and Laboratory Medicine, Faculty of Medicine Tabriz Iran
| | - N Zarghami
- Tabriz University of Medical Sciences Immunology Research Center Tabriz Iran
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21
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Azimi A, Hagh MF, Yousefi B, Rahnama MA, Khorrami A, Heydarabad MZ, Najafpour M, Hallajzadeh J, Ghahremani A. The Effect of Prednisolone on miR 15a and miR16-1 Expression Levels and Apoptosis in Acute Lymphoblastic Leukemia Cell Line: CCRF-CEM. Drug Res (Stuttg) 2016; 66:432-5. [PMID: 27281445 DOI: 10.1055/s-0042-108640] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
BACKGROUND Glucocorticoids are probably the most important drugs in the treatment of childhood acute lymphoblastic leukemia (ALL). Prednisolone exerts its effect by induce apoptosis in lymphoid lineage cells. Micro RNAs are 18-24 nucleotides RNA implicated in the control of essential biological functions, including apoptosis. In the following study, the effect of prednisolone on the expression of miR 15a & miR16-1 and apoptosis in the CCRF-CEM cell line is investigated. METHODS The cell line of CCRF-CEM was cultured in standard conditions. The changes in the miR 15a and miR 16-1 expression levels were determined by Real Time-PCR technique. Also, the apoptosis is evaluated by flow cytometry using Annexin V and PI staining. RESULTS This study revealed that, the prednisolone induced apoptosis in a time dependent manner. Prednisolone in concentration of 700 µM was significantly increased the expression of miR 16-1 and miR 15a after 24 h and 48 h treatment (p<0.05). CONCLUSION prednisolone-induced apoptosis might be mediated by up-regulation of these 2 miRNAs in CCRF-CEM cells.
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Affiliation(s)
- A Azimi
- Department of Basic Sciences, Maragheh University of Medical Sciences, Maragheh, Iran
| | - M F Hagh
- Hematology and Oncology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - B Yousefi
- Department of Biochemistry, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - M A Rahnama
- Department of Hematology, Faculty of Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
| | - A Khorrami
- Department of Basic Sciences, Maragheh University of Medical Sciences, Maragheh, Iran
| | - M Z Heydarabad
- Hematology and Oncology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - M Najafpour
- Medical Biotechnology Research Center, Guilan University of Medical Sciences, Rasht, Iran
| | - J Hallajzadeh
- Department of Basic Sciences, Maragheh University of Medical Sciences, Maragheh, Iran
| | - A Ghahremani
- Department of Basic Sciences, Maragheh University of Medical Sciences, Maragheh, Iran
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Yekta A, Khabazkhoob M, Hashemi H, Shadalouee Z, Ostadimoghaddam H, Rezvan F, Azimi A, Heravian J, Yekta R, Davari Ashteyani R. Frequency of refractive errors and binocular vision anomalies in children with learning disability. Acta Ophthalmol 2015. [DOI: 10.1111/j.1755-3768.2015.0283] [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: 11/29/2022]
Affiliation(s)
- A.A. Yekta
- Optometry; Mashhad University of Medical Sciences; Mahhad Iran
| | - M. Khabazkhoob
- Noor Eye Hospital; Noor Ophthalmology Research Center; Tehran Iran
| | - H. Hashemi
- Noor Eye Hospital; Noor Ophthalmology Research Center; Tehran Iran
| | - Z. Shadalouee
- Optometry; Mashhad University of Medical Sciences; Mahhad Iran
| | - H. Ostadimoghaddam
- Refractive Errors Research Center; Mashhad University of Medical Sciences; Mahhad Iran
| | - F. Rezvan
- Noor Eye Hospital; Noor Ophthalmology Research Center; Tehran Iran
| | - A. Azimi
- Optometry; Mashhad University of Medical Sciences; Mahhad Iran
| | - J. Heravian
- Optometry; Mashhad University of Medical Sciences; Mahhad Iran
| | - R. Yekta
- Fadak Cclinic; Fadak clinik; Mahhad Iran
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Sadaghiani S, Nazeri A, Roostaei T, Naghibzadeh G, Park M, Owji M, Moghadasi A, Azimi A, Rad A, Sahraian M. Clinical and radiologic correlates of quality of life measures in patients with relapse-onset multiple sclersosis. Mult Scler Relat Disord 2014. [DOI: 10.1016/j.msard.2014.09.208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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24
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Azimi A, Pernemalm M, Frostvik Stolt M, Hansson J, Lehtiö J, Egyházi Brage S, Hertzman Johansson C. Proteomics analysis of melanoma metastases: association between S100A13 expression and chemotherapy resistance. Br J Cancer 2014; 110:2489-95. [PMID: 24722184 PMCID: PMC4021518 DOI: 10.1038/bjc.2014.169] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Revised: 03/01/2014] [Accepted: 03/05/2014] [Indexed: 01/20/2023] Open
Abstract
BACKGROUND Disseminated cutaneous malignant melanoma (CMM) is commonly unresponsive to standard chemotherapies, and there are as yet no predictive markers of therapy response. METHODS In the present study we collected fresh-frozen pretreatment lymph-node metastasis samples (n=14) from melanoma patients with differential response to dacarbazine (DTIC) or temozolomide (TMZ) chemotherapy, to identify proteins with an impact on treatment response. We performed quantitative protein profiling using tandem mass spectrometry and compared the proteome differences between responders (R) and non-responders (NR), matched for age, gender and histopathological type of CMM. RESULTS Biological pathway analyses showed several signalling pathways differing between R vs NR, including Rho signalling. Gene expression profiling data was available for a subset of the samples, and the results were compared with the proteomics data. Four proteins with differential expression between R and NR were selected for technical validation by immunoblotting (ISYNA1, F13A1, CSTB and S100A13), and CSTB and S100A13 were further validated on a larger sample set by immunohistochemistry (n=48). The calcium binding protein S100A13 was found to be significantly overexpressed in NR compared with R in all analyses performed. CONCLUSIONS Our results suggest that S100A13 is involved in CMM resistance to DTIC/TMZ.
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Affiliation(s)
- A Azimi
- Department of Oncology-Pathology, Karolinska Institutet, CCK R8:03, Karolinska University Hospital, Solna, S-17176 Stockholm, Sweden
| | - M Pernemalm
- Department of Oncology-Pathology, Karolinska Institutet, Science for Life Laboratory, Tomtebodavägen 23, S-17165 Solna, Sweden
| | - M Frostvik Stolt
- Department of Oncology-Pathology, Karolinska Institutet, CCK R8:03, Karolinska University Hospital, Solna, S-17176 Stockholm, Sweden
| | - J Hansson
- Department of Oncology-Pathology, Karolinska Institutet, CCK R8:03, Karolinska University Hospital, Solna, S-17176 Stockholm, Sweden
| | - J Lehtiö
- Department of Oncology-Pathology, Karolinska Institutet, Science for Life Laboratory, Tomtebodavägen 23, S-17165 Solna, Sweden
| | - S Egyházi Brage
- Department of Oncology-Pathology, Karolinska Institutet, CCK R8:03, Karolinska University Hospital, Solna, S-17176 Stockholm, Sweden
| | - C Hertzman Johansson
- Department of Oncology-Pathology, Karolinska Institutet, CCK R8:03, Karolinska University Hospital, Solna, S-17176 Stockholm, Sweden
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Azimi A, Gitz Charlot M, Torp-Pedersen C, Thayssen P, Tilsted Hansen H, Thuesen L, Jensen P, Hansen P, Gislason G. Weight gain is associated with lower risk of death regardless of baseline BMI in women with angiographically documented coronary artery disease a nationwide study. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht310.4354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Azimi A, Johansson CH, Pernemalm M, Touminen R, Lehtiö J, Hansson J, Egyhazi S. 140 Unraveling BRAF Inhibitor (PLX4032) Resistance Mechanisms. Eur J Cancer 2012. [DOI: 10.1016/s0959-8049(12)71938-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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27
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Azimi A, Kuznecovs S, Kuznecovs J, Blazejczyk A, Switalska M, Chlopicki S, Marcinek A, Gebicki J, Wietrzyk J, Egyhazi S, Azimi A, Ghasghgaei S, Frostvik Stolt M, Hertzman Johansson C, Hansson J, Delage JD, Li H, Lu H, Cazin LH, Vannier JP, Drouet L, Dupuy E, Soria J, Varin R, Soria C, Castle J, Kreiter S, Diekmann J, Lower M, van der Roemer N, de Graaf J, Selmi S, Diken M, Boegel S, Paret C, Koslowski M, Kuhn AN, Britten CM, Huber C, Tureci O, Sahin U, Procopio G, Verzoni E, Testa I, de Braud F, Misale S, Yaeger R, Hobor S, Scala E, Janakiraman M, Liska D, Valtorta E, Schiavo R, Buscarino M, Siravergna G, Bencardino K, Cercek A, Chen C, Veronese S, Zanon C, Sartore-Bianchi A, Gambacorta M, Gallicchio M, Vakiani E, Boscaro V, Medico E, Weiser M, Siena S, di Nicolantonio F, Solit D, Bardelli A, Burbridge MF, Dovat SP, Song C, Payne KJ, Yang L, Cree A, Glaysher M, Bolton L, Johnson P, Atkey N, Torrance C, Bogush TA, Dudko EA, Shaturova AS, Tikhomirov MV, Bogush EA, Polotsky BE, Tjulandin SA, Davydov MI, Hertzman Johansson C, Azimi A, Pernemalm M, Pawitan Y, Frostvik Stolt M, Lazar V, Lundeberg J, Lehtio J, Egyhazi S, Hansson J, Rasul A, Ma T, Dyshlovoy SA, Naeth I, Venz S, Fedorov SN, Shubina LK, Stonik VA, Balabanov S, Honecker F, Kongpracha P, Tohtong R, Demidkina V, Kudryavtsev VA, Kabakov AE, Golan T, Atias D, Barshack I, Avivi C, Goldstein RS, Berger R, Ben-Arieh S, Urban D, Maimon N, Leibowitz-Amit R, Keizman D, Biran H, Mishaeli M, Onn A, Gottfried M, Saraswati S, Agrawal SS, Raval P, Patel M, Ganure L, Hanen JH, Sonia BHK, Aya M, Zohra H, Touhami M, Cheng X, Shi TY, Yang L, Yang G, Tu XY, Wu XH, Wei QY, Benboubker H, Zheng BQ, Shi YQ, He XH, Liang LH, Saied GM. Therapeutics. Ann Oncol 2012. [DOI: 10.1093/annonc/mds162] [Citation(s) in RCA: 2] [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: 11/13/2022] Open
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Rezaei B, Hadadzadeh H, Azimi A. Fabrication of an optical sensor based on the immobilization of Qsal on the plasticized PVC membrane for the determination of copper(II). J Anal Chem 2012. [DOI: 10.1134/s1061934812080060] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [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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Azimi A. P2.01 Characterization of Resistance Mechanisms To The Braf Inhibitor Vemurafenib (PLX4032). Ann Oncol 2012. [DOI: 10.1016/s0923-7534(20)31324-7] [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: 10/25/2022] Open
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30
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Egyhazi S, Azimi A, Ghasghgaei S, Frostvik Stolt M, Hertzman Johansson C, Hansson J. P2.04 Effects of Combined Exposure To Braf and Pi3K Inhibitors With Chemotherapeutic Agents. Ann Oncol 2012. [DOI: 10.1016/s0923-7534(20)31327-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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31
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Hertzman Johansson C, Azimi A, Pernemalm M, Pawitan Y, Frostvik Stolt M, Lazar V, Lundeberg J, Lehtiö J, Egyhazi S, Hansson J. P2.17 Proteomics and Gene Expression Profiling of Melanoma Chemotherapy Response in Tumors. Ann Oncol 2012. [DOI: 10.1016/s0923-7534(20)31340-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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32
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Heravian J, Daneshvar R, Dashti F, Azimi A, Ostadi Moghaddam H, Yekta AA, Esmaily H. Simultaneous pattern visual evoked potential and pattern electroretinogram in strabismic and anisometropic amblyopia. Iran Red Crescent Med J 2011; 13:21-6. [PMID: 22946015 PMCID: PMC3407582] [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] [Subscribe] [Scholar Register] [Received: 06/10/2010] [Accepted: 08/18/2010] [Indexed: 11/20/2022]
Abstract
BACKGROUND Amblyopia is a relatively common condition in which visual acuity through an eye is subnormal despite no overt pathology. Pattern visual evoked potential (PVEP) can detect any defect from optic nerve to occipital cortex and pattern electroretinogram (PERG) can detect retinal defects specially the ganglion layers. This study was performed to evaluate the cortical and retinal activity in strabismic and anisometropic amblyopia. METHODS PVEP and PERG were recorded simultaneously in 40 amblyopes (20 strabismics and 20 anisometropics) and 20 normal control subjects. Normal subjects were age and sex matched with patients. RESULTS The P(100) latency in PVEP was increased in both groups of patients but the P(100) amplitude was reduced only in anisometropic group. In PERG, the amplitude of P(50) was reduced in all patients with no significant change in latency. CONCLUSION Beside reduced PVEP responses in strabismic and anisometropic amblyopia, the activity of retina reduced too. It is likely that retinal impulses can affect the development of visual system.
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Affiliation(s)
- J Heravian
- Department of Optometry, School of Paramedical Sciences, Mashhad, Iran,Correspondence: Javad Heravian, PhD,Department of Optometry, School of Paramedical Sciences, +98-915-5154052, +98-511-7628088, E-mail:
| | - R Daneshvar
- Eye Research Center, Khatam Anbia Hospital, Mashhad, Iran
| | - F Dashti
- Department of Optometry, School of Paramedical Sciences, Mashhad, Iran
| | - A Azimi
- Department of Optometry, School of Paramedical Sciences, Mashhad, Iran
| | | | - A A Yekta
- Department of Optometry, School of Paramedical Sciences, Mashhad, Iran
| | - H Esmaily
- Department of Social Medicine, School of Health, Mashhad University of Medical Sciences, Mashhad, Iran
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Fallah M, Azimi A, Taherkhani H. Seroprevalence of toxocariasis in children aged 1-9 years in western Islamic Republic of Iran, 2003. East Mediterr Health J 2007; 13:1073-7. [DOI: 10.26719/2007.13.5.1073] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Abstract
As the precise role of nitric oxide (NO) as a modulator of myocardial contraction and the force-interval relationship remains unclear, the objective of this study was to examine the effect of the NO donor S-nitroso-N-acetyl-penicillamine (SNAP) on baseline myocardial contraction, and the impact of both SNAP and the NO synthase (NOS) inhibitor N(G)-nitro-L-arginine methyl ester (L-NAME) on the force interval relation. Studies were performed using isolated rat papillary muscles. In the presence of baseline NOS blockade, nanomolar to micromolar concentrations of SNAP exerted a modest positive inotropic effect with a small but significant increase in twitch isometric tension (P<0.007). Nanomolar concentrations of SNAP also reduced overall twitch duration (P<0.007). These effects were not seen in control experiments using N-acetyl-penicillamine instead of SNAP. The force-frequency response (FFR) and post-rest contractile potentiation, mechanical correlates of sarcoplasmic reticulum (SR) Ca(2+)handling, were also examined. Neither L-NAME nor SNAP had any effect on post-rest potentiation following rest intervals as long as 6 min, or on the negative FFR at stimulation frequencies between 0.3 to 1.7 Hz. However, L-NAME significantly blunted the net reduction in twitch duration between 0.3 Hz and 1.7 Hz compared to control (P=0.006), an effect reversed by 100 n m SNAP. These results indicate that low concentrations of NO can modulate myocardial function by influencing myocardial inotropy and the time course of myofilament interaction, but do not impact significantly on the force-interval relation and, by inference, SR Ca(2+)handling. Moreover, modulation of twitch duration occurs over a range of stimulation frequencies, suggesting a mechanistic role for NO in the changes in contraction and relaxation time intervals seen during changes in heart rate.
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Affiliation(s)
- S D Prabhu
- Department of Medicine, University of Texas Health Science Center at San Antonio, San Antonio, Texas 78284, USA.
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Rosenfield M, Ciuffreda KJ, Ong E, Azimi A. Proximally induced accommodation and accommodative adaptation. Invest Ophthalmol Vis Sci 1990; 31:1162-7. [PMID: 2354916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
To determine the effect of proximally induced accommodation (PIA) on accommodative adaptation, this study has examined the posttask shift in tonic accommodation (TA) following 5-min monocular viewing of equivalent-sized targets located at distances of 0.33 and 5 m. The distal target was viewed through a negative lens to equate the dioptric stimuli (3 D). The steady-state accommodative response was measured subjectively in 10 subjects using a Hartinger coincidence optometer. A significant correlation was observed between the degree of adaptation following the two conditions, with the magnitude of adaptation for the distal target being approximately half that for the nearer target. Furthermore, adaptation magnitude was inversely correlated with pretask TA under both conditions. These results indicate that PIA can produce accommodative adaptation. The implications of this finding are discussed with regard to models of the accommodative mechanism.
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Affiliation(s)
- M Rosenfield
- Schnurmacher Institute for Vision Research, Department of Vision Sciences, SUNY/State College of Optometry, NY 10010
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36
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Abstract
Steady-state accommodative responses to a wide range of commonly encountered textural and graphic stimuli were investigated in 12 young, visually normal subjects. Details of two experiments are described. In the first experiment, stimuli were varied in terms of size, contrast, spatial frequency, colour and intellectual demand. In the second experiment, only the colour of the targets was systematically altered. In both experiments the stimulus demand was maintained at 3 D, and accommodation was measured subjectively using a Hartinger coincidence optometer. No significant difference in mean accommodative response was observed between the widely differing targets adopted in either experiment. These findings suggest that an overall threshold exists for accommodative stimuli, with supra-threshold targets of low to moderate contrast being capable of initiating and sustaining an appropriate accommodative response.
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Affiliation(s)
- K J Ciuffreda
- Department of Vision Sciences, SUNY/State College of Optometry, NY 10010
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