Publications by authors named "Ali Asghar Okhovat"

16 Publications

  • Page 1 of 1

Application of CMAP scan for the evaluation of patients with chronic inflammatory demyelinating polyneuropathy: a prospective study.

Neurophysiol Clin 2021 Mar 7;51(2):175-181. Epub 2021 Jan 7.

Neurology Department, Shariati Hospital, Tehran University of Medical Sciences, Tehran, Iran. Electronic address:

Aims: We aimed to assess the compound muscle action potential (CMAP) scan in the follow-up of chronic inflammatory demyelinating polyneuropathy (CIDP) patients and investigate the correlation of CMAP scan parameters with functional and standard electrodiagnostic tests.

Methods: We evaluated four parameters of abductor pollicis brevis (APB) CMAP scan (i.e., step numbers, step percentage, S10, S90), functional measures (e.g., Medical Research Council Sum Scores), and electrodiagnostic tests, including nerve conduction study (NCS) and motor NCS of the median nerve in the baseline and after six months of treatment.

Results: Twenty patients completed baseline clinical and electrodiagnostic studies. However, sixteen patients completed the follow-up study. The median of step numbers at baseline was 3.5 (2-4.2), which decreased to 2.5 (0-3) (p = 0.005). After the treatment, step percentage reduced from 28.6 (23.9-38.7) to 13.4 (0-23.6) (p = 0.001). The scores obtained from the clinical scales showed significant recovery of most of the functions, while the alterations of NCSS and NCS of the median nerve were not significant.

Conclusions: We found a significant reduction in step number and step percentage after follow-up. This alteration was not reflected in standard electrodiagnostic values. The improvement of functional scales alongside the CMAP scan parameters suggests that the CMAP scan could be considered an appropriate outcome measurement in research and clinical fields.
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http://dx.doi.org/10.1016/j.neucli.2020.12.005DOI Listing
March 2021

Sporadic late-onset nemaline myopathy with monoclonal gammopathy of undetermined significance: Report of four patients.

Neuromuscul Disord 2021 01 12;31(1):29-34. Epub 2020 Nov 12.

Neurology Department, Shariati Hospital, Tehran University of Medical Sciences, Tehran, Iran. Electronic address:

Sporadic late-onset nemaline myopathy (SLONM) is a rare, acquired muscle disease presenting with subacute progression in adulthood. It can be accompanied by a monoclonal gammopathy of undetermined significance (MGUS). We describe clinical and histopathological findings of four SLONM patients with MGUS. In all patients, nemaline rod, inter-myofibrillary network disruption, atrophic changes, peripheral basophilic discoloration, vacuole without rim, and cytoplasmic body without inflammation were seen. Three out of four patients were treated with prednisolone in combination with IVIG monthly and had an appropriate response to the treatment. The optimal first-line treatment remains unclear in SLONM-MGUS, although corticosteroids plus IVIg is associated with favorable clinical response. These treatment modalities might be used as an optional treatment before autologous stem cell transplantation; however, further studies with a higher number of patients are required.
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http://dx.doi.org/10.1016/j.nmd.2020.11.004DOI Listing
January 2021

BVVL/ FL: features caused by SLC52A3 mutations; WDFY4 and TNFSF13B may be novel causative genes.

Neurobiol Aging 2021 03 5;99:102.e1-102.e10. Epub 2020 Oct 5.

School of Biology, College of Science, University of Tehran, Tehran, Iran. Electronic address:

Brown-Vialetto-Van Laere (BVVL) and Fazio-Londe are disorders with amyotrophic lateral sclerosis-like features, usually with recessive inheritance. We aimed to identify causative mutations in 10 probands. Neurological examinations, genetic analysis, audiometry, magnetic resonance imaging, biochemical and immunological testings, and/or muscle histopathology were performed. Mutations in known causative gene SLC52A3 were found in 7 probands. More importantly, only 1 mutated allele was observed in several patients, and variable expressivity and incomplete penetrance were clearly noted. Environmental insults may contribute to variable presentations. Putative causative mutations in other genes were identified in 3 probands. Two of the genes, WDFY4 and TNFSF13B, have immune-related functions. Inflammatory responses were implicated in the patient with the WDFY4 mutation. Malfunction of the immune system and mitochondrial anomalies were shown in the patient with the TNFSF13B mutation. Prevalence of heterozygous SLC52A3 BVVL causative mutations and notable variability in expressivity of homozygous and heterozygous genotypes are being reported for the first time. Identification of WDFY4 and TNFSF13B as candidate causative genes supports conjectures on involvement of the immune system in BVVL and amyotrophic lateral sclerosis.
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http://dx.doi.org/10.1016/j.neurobiolaging.2020.09.021DOI Listing
March 2021

Posterior reversible encephalopathy syndrome with spinal cord involvement as the first presentation of lupus nephritis.

Iran J Neurol 2019 Oct;18(4):179-180

Department of Neurology, Shariati Hospital, Tehran University of Medical Sciences, Tehran, Iran.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7036048PMC
October 2019

Evaluation of Quality of Life in Patients With Chronic Inflammatory Demyelinating Polyneuropathy in Iran.

J Clin Neuromuscul Dis 2019 Dec;21(2):77-83

Neurology Department, Shariati Hospital, Iranian Center of Neurological Research, Neuroscience Institute, Tehran University of Medical Sciences, Tehran, Iran.

Objectives: In addition to the physical disability in chronic inflammatory demyelinating polyneuropathy (CIDP), various aspects of quality of life (QoL) are affected by the disease. Our goal was to evaluate the QoL in Iranian patients with CIDP and to study the association of clinical and demographic factors with QoL parameters.

Methods: Twenty-six Iranian patients with CIDP were asked to complete a standardized Persian version of SF-36, and the association of demographic and functional parameters with QoL parameters was assessed.

Results: Sex, living place, and income had no significant effect on QoL. Mean physical composite score was 37.7 ± 9.4, and mean mental composite score was 37.2 ± 15.2 that was lower than similar studies. There was a positive correlation between QoL and muscle strength of different muscle groups [hand (r = 0.41, P = 0.04); hip (r = 0.44, P = 0.02); and foot (r = 0.41, P = 0.04); total manual muscle testing (r = 0.46, P = 0.02)] and a significant negative correlation between the duration of illness and mean physical composite score (r = -0.61, P = 0.00).

Conclusions: Our patients achieved low scores in both the physical and mental aspects of QoL compared with other studies. We found a significant correlation between the physical domain of the SF-36 score and muscle strength of the hand, hip, and foot muscle group and with total manual muscle testing, suggesting that physical disability is the most crucial factor affecting QoL. Also, there was a significant negative association between the duration of the disease and the physical domain.
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http://dx.doi.org/10.1097/CND.0000000000000272DOI Listing
December 2019

Longitudinally extensive myelitis as first presentation of renal cell carcinoma.

Iran J Neurol 2018 Oct;17(4):197-199

Department of Neurology, Alzahra Hospital, Isfahan University of Medical Sciences, Isfahan, Iran.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6555890PMC
October 2018

Associations between adherence to dietary approaches to stop hypertension (DASH) diet and migraine headache severity and duration among women.

Nutr Neurosci 2020 May 31;23(5):335-342. Epub 2018 Jul 31.

Department of Community Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences (TUMS), Tehran, Iran.

Migraine is a common disorder, with attacks causing neurological dysfunction and pain. Many foods are involved in reducing the severity of migraine attacks. This study aimed to assess the effects that adhering to the Dietary approaches to stop hypertension (DASH) diet had on headache severity and duration among women suffering from migraine. Two hundred and sixty-six women (18-45 years) were enrolled after being referred to a headache clinic for the first time. Dietary intake was assessed daily using a Food Frequency Questionnaire. Anthropometric measurements were assessed for all cases, as well as headache duration of each attack; Visual Analog Scale and Migraine Disability Assessment questionnaires were evaluated by a neurologist. The mean age, weight, and height of the study participants were 34.32 (SD 7.86) years, 69.41 (13.02) kg, and 161 (0.05) cm, respectively. The results of analysis in the crude model showed that individuals with the greatest adherence to the DASH diet displayed a 30% lower prevalence in severe headaches, compared to those with the lowest adherence (OR=0.70, 95%CI=0.49-0.99, <0.05). Also, after controlling for potential confounders, subjects in the highest quartile of DASH diet adherence were 46% less likely to have severe headaches, and also saw a 36% lower occurrence of moderate headaches, compared to those in the bottom quartile (OR=0.54, 95%CI=0.35-0.83, <0.005 and OR=0.64, 95%CI=0.44-0.95, <0.005, respectively). These results showed a significant positive correlation between adherence to DASH diets and lower rates of mean headache duration for each attack in the last month (=-1.49, CI=0.21-2.7, =0.02). This study showed that the DASH diet is associated with lower headache severity and duration in migraine patients.
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http://dx.doi.org/10.1080/1028415X.2018.1503848DOI Listing
May 2020

Epidemiology and Clinical Features of Guillain-Barre Syndrome in Isfahan, Iran.

Adv Biomed Res 2018 29;7:87. Epub 2018 May 29.

Sina Trauma and Surgery Research Center, Tehran University of Medical Sciences, Tehran, Iran.

Background: Guillain-Barre syndrome (GBS) is an immune-mediated peripheral neuropathy. We compared clinical, laboratory characteristics, and disease course of GBS subtypes in a large group of Iranian patients in Isfahan.

Materials And Methods: We collected data from patients who were admitted to Alzahra referral university Hospital, Isfahan, Iran with a diagnosis of GBS. In this population-based cross-sectional research, characteristic of 388 cases with GBS between 2010 and 2015 were studied.

Results: The current study recruited 388 patients with GBS including 241 males (62.1%) and 147 females (37.9%) with a mean age of 42.78 ± 21.34. Patients with polyradiculopathy had the highest mean age of 55.12 ± 20.59 years, whereas the least age was seen in acute motor axonal neuropathy (AMAN) with the mean of 36.30 ± 18.71 years. The frequency of GBS witnessed the highest frequency in spring with 113 cases (29.1%) and winter with 101 cases (26%). Patients' electrodiagnostic findings indicated that the highest frequency pertained to AMSAN with 93 cases (24%), whereas the least frequent diagnosis was acute Polyradiculopathy with 8 cases (2.1%). Most of the patients did not have any infections (53.6%) and among patients with infections, AMSAN had the highest frequency (22.9%) and finally, patients with AMSAN and AMAN had a higher length of stay.

Conclusion: The study demonstrated incidence, sex distribution, preceding infection, and surgery similar to previous studies. However, our data differs from a study in Tehran that showed acute inflammatory demyelinating polyradiculoneuropathy is more prevalent than other types and we found a seasonal preponderance in cold months, particularly in axonal types.
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http://dx.doi.org/10.4103/abr.abr_50_17DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5991291PMC
May 2018

Molecular mechanisms of omega-3 fatty acids in the migraine headache.

Iran J Neurol 2017 Oct;16(4):210-217

Department of Cellular and Molecular Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, Tehran, Iran.

Migraine is a common chronic inflammatory neurological disease with the progressive and episodic course. Much evidence have shown a role of inflammation in the pathogenesis of migraine. Omega-3 fatty acids are an important components of cell membranes phospholipids. The intake of these fatty acids is related to decrease concentration of C-reactive protein (CRP), proinflammatory eicosanoids, cytokines, chemokines and other inflammation biomarkers. Many of clinical trials have shown the beneficial effect of dietary supplementation with omega-3 fatty acids in inflammatory and autoimmune diseases in human, including Parkinson's disease (PD), amyotrophic lateral sclerosis (ALS), Alzheimer's disease (AD), multiple sclerosis (MS) and migraine headaches. Therefore, omega-3 fatty acids as an alternative therapy can be potentially important. This review focuses on the pathogenesis of a migraine, with an emphasis on the role of omega-3 fatty acid and its molecular mechanisms.
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5937007PMC
October 2017

Modified Atkins diet in adult with refractory epilepsy: A controlled randomized clinical trial.

Iran J Neurol 2017 Apr;16(2):72-77

Isfahan Neurosciences Research Center, Alzahra Research Institute, Department of Neurology, Isfahan University of Medical Sciences, Isfahan, Iran.

The usefulness of the modified Atkins diet (mAD) in refractory epilepsy in adults has been rarely investigated. We aimed to evaluate the efficacy of mAD in adult with refractory epilepsy. In a controlled randomized clinical trial, we enrolled 66 refractory adult epileptic cases from February 2010 to December 2012. The patients were randomly divided into two groups, case groups (22 patients) used antiepileptic drugs and mAD and control group (32 patients) only use antiepileptic drugs. The primary outcome was at least 50% decrement in seizure frequency after 2 months of therapy. No significant difference was shown in our data between groups regarding baseline characteristic. The differences of mean seizure attack after 2 months (P < 0.001). (17.6%) had > 50% seizure decrease at 1 and after 2 months and 12 (35.3%) had 50% decrease in seizure frequency. Furthermore, in mAD group, the mean urinary ketone positivity was 1.75 ± 0.28 and increasing liver enzyme was shown 5 cases (14.7%) in mAD group and 5 cases (15.6%) in control group (P < 0.050). The mAD may be effective as a cotherapy treatment for adults with refractory epilepsy and decrease 2.19 times seizure frequency in comparison with control groups. Trials with the more tolerant dietary regime, with larger sample size and longer duration, should be performed in future.
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5526780PMC
April 2017

The synergistic effects of ω-3 fatty acids and nano-curcumin supplementation on tumor necrosis factor (TNF)-α gene expression and serum level in migraine patients.

Immunogenetics 2017 06 6;69(6):371-378. Epub 2017 May 6.

Department of Cellular and Molecular Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, Tehran, Iran.

Migraine is a destabilizing neuroinflammatory disorder characterized by recurrent headache attacks. Evidences show tumor necrosis factor (TNF)-α play a role in neuroimmunity pathogenesis of migraine. TNF-α increase prostanoid production, hyperexcitability of neurons, and nociceptor activation resulted in neuroinflammation and neurogenic pain. ω-3 fatty acids and curcumin exert neuroprotective and anti-inflammatory effects via several mechanisms including suppression of TNF-α gene expression and its serum levels. The aim of this study is an evaluation of synergistic effects of ω-3 fatty acids and nano-curcumin on TNF-α gene expression and serum levels in migraine patients. The present study performed as a clinical trial over a 2 month period included 74 episodic migraine patients in 4 groups and received ω-3 fatty acids, nano-curcumin, and combination of them or placebo. At the start and the end of the study, the gene expression of TNF-α and TNF-α serum levels was measured by real-time PCR and ELISA method, respectively. Our results showed that the combination of ω-3 fatty acids and nano-curcumin downregulated TNF-α messenger RNA (mRNA) significantly in a synergistic manner (P < 0.05). As relative to gene expression, a significant greater reduction in serum levels of TNF-α were observed in the combination group, but no significant differences in other groups. Supplementation with ω-3 fatty acids or nano-curcumin alone did not show significant reduction either in mRNA or serum levels of TNF-α. In addition, a much greater reduction in attack frequency was found in the combination group (P < 0.001). These findings indicated that ω-3 fatty acids and curcumin supplementation can be considered as a new promising approach in migraine management.
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http://dx.doi.org/10.1007/s00251-017-0992-8DOI Listing
June 2017

Watershed Infarct in Beta-Thalassemia Major Patient.

Case Rep Neurol Med 2017 27;2017:2736402. Epub 2017 Mar 27.

Department of Neurology, Isfahan University of Medical Sciences, Isfahan, Iran.

. The mechanism of stroke in beta-thalassemia was reported previously as cardioembolic and hypercoagulable state. However, there is no report of watershed infarct in beta-thalassemia anemia. . We present an adult -thalassemia major patient with manifest asymptomatic chronic left carotid occlusion who suffered watershed infarct. . In the presence of asymptomatic chronic left internal carotid occlusion, we assumed that severe anemia (hemoglobin = 3) at admission leads to watershed infarct. . Watershed infarct seems to be the cause of stroke in cases of -thalassemia major with severe anemia. Blood transfusion can be applied in the setting of acute brain ischemia in such high risk patients.
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http://dx.doi.org/10.1155/2017/2736402DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5385913PMC
March 2017

Catastrophic presentation of a patient with combined NMOSD and thrombotic thrombocytopenic purpura/hemolytic uremic syndrome: a case report.

Acta Neurol Belg 2017 09 18;117(3):757-759. Epub 2016 Oct 18.

Department of Neurology, Sina Hospital, Tehran University of Medical Sciences, Tehran, Iran.

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http://dx.doi.org/10.1007/s13760-016-0710-6DOI Listing
September 2017

Clinical and electrodiagnostic findings in cyhalothrine poisoning.

Adv Biomed Res 2016 16;5:32. Epub 2016 Mar 16.

Department of Neurology, Kashani Hospital, Shahre-Kord University of Medical Sciences, Shahre-Kord, Iran.

Acute onset bulbar symptoms with respiratory failure and descending paralysis may occur in several neuromuscular disorders including variants of Guillain-Barre syndrome (GBS), diphtheria, botulism and toxins. We present a 51-year-old man who presented with complains of ptosis and dyspnea following pyrethroids spraying in an enclosed area for eradication of flea. Within 5-6 days of admission limb weakness, dysphagia, dysarthria, blurred vision, diplopia, tremor and respiratory distress added to previous symptoms. Temporal profile of events after exposure, development of similar symptoms in patient's son, electrodiagnostic findings and exclusion of other etiologies confirms intoxication etiology. We reviewed the literature and provide an extensive electrodiagnostic overview.
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http://dx.doi.org/10.4103/2277-9175.178793DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4815519PMC
April 2016

Supratentorial cortical ependymoma: An unusual presentation of a rare tumor.

Adv Biomed Res 2015 25;4:72. Epub 2015 Mar 25.

Resident of Pathology, Isfahan University of Medical Sciences, Isfahan, Iran.

Ependymomas are glial tumors derived from ependymal cells lining the ventricles and the central canal of the spinal cord. Two thirds of ependymomas arise in the infratentorial or intraventricles, whereas one-third are located in supratentorial space. But supratentorial "cortical" ependymomas are very rare. We report a case of a cortical ependymoma in a 17-year-old boy. The patient presented with transient recurrent right weakness and diplopia. This tumor was located in the left parieto-occipital region and he had gross total excision. Microscopy and immunohistochemistry showed grade III differentiation ependymoma.
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http://dx.doi.org/10.4103/2277-9175.153896DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4386199PMC
April 2015

Life-threatening misdiagnosis of bulbar onset myasthenia gravis as a motor neuron disease: How much can one rely on exaggerated deep tendon reflexes.

Adv Biomed Res 2015 23;4:58. Epub 2015 Feb 23.

Department of Neurology, Isfahan Neurosciences Research Center, Alzahra Hospital, Isfahan University of Medical Sciences, Isfahan, Iran.

The autoimmune disease myasthenia gravis (MG), can mimic a variety of neurological disorders leading to a delay in diagnosis and treatment. On occasions, misdiagnosis of MG could lead to unnecessary therapeutic interventions. We report the case of a 50 year-old man, in whom MG was mistaken for motor neuron disease (MND). Subsequently, correct diagnosis and optimal management resulted in saving his life and significant improvement in his functional status. We discuss the importance of considering MG as one of the potential differential diagnoses among cases of new onset or recurrent unexplained bulbar symptoms, despite exaggerated deep tendon reflexes. Also, a literature review on the misdiagnosis of MG and the potential pitfalls in MG diagnosis are discussed.
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http://dx.doi.org/10.4103/2277-9175.151874DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4361956PMC
March 2015