11 results on '"Norouzi, Mehdi"'
Search Results
2. Unsupervised video summarization with adversarial graph-based attention network
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Gunuganti, Jeshmitha, Yeh, Zhi-Ting, Wang, Jenq-Haur, and Norouzi, Mehdi
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- 2024
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3. Augmenting Multimodal Content Representation with Transformers for Misinformation Detection †.
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Wang, Jenq-Haur, Norouzi, Mehdi, and Tsai, Shu Ming
- Abstract
Information sharing on social media has become a common practice for people around the world. Since it is difficult to check user-generated content on social media, huge amounts of rumors and misinformation are being spread with authentic information. On the one hand, most of the social platforms identify rumors through manual fact-checking, which is very inefficient. On the other hand, with an emerging form of misinformation that contains inconsistent image–text pairs, it would be beneficial if we could compare the meaning of multimodal content within the same post for detecting image–text inconsistency. In this paper, we propose a novel approach to misinformation detection by multimodal feature fusion with transformers and credibility assessment with self-attention-based Bi-RNN networks. Firstly, captions are derived from images using an image captioning module to obtain their semantic descriptions. These are compared with surrounding text by fine-tuning transformers for consistency check in semantics. Then, to further aggregate sentiment features into text representation, we fine-tune a separate transformer for text sentiment classification, where the output is concatenated to augment text embeddings. Finally, Multi-Cell Bi-GRUs with self-attention are used to train the credibility assessment model for misinformation detection. From the experimental results on tweets, the best performance with an accuracy of 0.904 and an F1-score of 0.921 can be obtained when applying feature fusion of augmented embeddings with sentiment classification results. This shows the potential of the innovative way of applying transformers in our proposed approach to misinformation detection. Further investigation is needed to validate the performance on various types of multimodal discrepancies. [ABSTRACT FROM AUTHOR]
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- 2024
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4. Human T-cell lymphotropic virus type 1 (HTLV-1) grip on T-cells: investigating the viral tapestry of activation
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Letafati, Arash, primary, Bahavar, Atefeh, additional, Tabarraei, Alijan, additional, Norouzi, Mehdi, additional, Amiri, Abdollah, additional, and Mozhgani, Sayed-Hamidreza, additional
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- 2024
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5. From discovery to treatment: tracing the path of hepatitis E virus.
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Letafati, Arash, Taghiabadi, Zahra, Roushanzamir, Mahshid, Memarpour, Bahar, Seyedi, Saba, Farahani, Ali Vasheghani, Norouzi, Masoomeh, Karamian, Saeideh, Zebardast, Arghavan, Mehrabinia, Marzieh, Ardekani, Omid Salahi, Fallah, Tina, Khazry, Fatemeh, Daneshvar, Samin Fathi, and Norouzi, Mehdi
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HEPATITIS E virus ,CHRONIC active hepatitis ,KILLER cells ,VIRAL hepatitis ,ANTIBODY formation - Abstract
The hepatitis E virus (HEV) is a major cause of acute viral hepatitis worldwide. HEV is classified into eight genotypes, labeled HEV-1 through HEV-8. Genotypes 1 and 2 exclusively infect humans, while genotypes 3, 4, and 7 can infect both humans and animals. In contrast, genotypes 5, 6, and 8 are restricted to infecting animals. While most individuals with a strong immune system experience a self-limiting infection, those who are immunosuppressed may develop chronic hepatitis. Pregnant women are particularly vulnerable to severe illness and mortality due to HEV infection. In addition to liver-related complications, HEV can also cause extrahepatic manifestations, including neurological disorders. The immune response is vital in determining the outcome of HEV infection. Deficiencies in T cells, NK cells, and antibody responses are linked to poor prognosis. Interestingly, HEV itself contains microRNAs that regulate its replication and modify the host's antiviral response. Diagnosis of HEV infection involves the detection of HEV RNA and anti-HEV IgM/IgG antibodies. Supportive care is the mainstay of treatment for acute infection, while chronic HEV infection may be cleared with the use of ribavirin and pegylated interferon. Prevention remains the best approach against HEV, focusing on sanitation infrastructure improvements and vaccination, with one vaccine already licensed in China. This comprehensive review provides insights into the spread, genotypes, prevalence, and clinical effects of HEV. Furthermore, it emphasizes the need for further research and attention to HEV, particularly in cases of acute hepatitis, especially among solid-organ transplant recipients. [ABSTRACT FROM AUTHOR]
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- 2024
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6. Effects of HTLV-1 on leukocyte trafficking and migration in ACs compared to healthy individuals.
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Letafati, Arash, Bahavar, Atefeh, Norouzi, Mehdi, Rasouli, Aziz, Hedayatyaghoubi, Mojtaba, Molaverdi, Ghazale, Mozhgani, Sayed-Hamidreza, and Siami, Zeinab
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HTLV-I ,ADULT T-cell leukemia ,GENE expression ,ASYMPTOMATIC patients ,CELL migration - Abstract
Human T-lymphotropic virus type 1 (HTLV-1) is a RNA virus belonging to Retroviridae family and is associated with the development of various diseases, including adult T-cell leukemia/lymphoma (ATLL) and HTLV-1-associated myelopathy/tropical spastic paraparesis (HAM/TSP). Aside from HAM/TSP, HTLV-1 has been implicated in the development of several disorders that mimic auto-inflammation. T-cell migration is important topic in the context of HTLV-1 associated diseases progression. The primary objective of this case–control study was to assess the relationship between increased mRNA expression in virus migration following HTLV-1 infection. PBMCs from 20 asymptomatic patients and 20 healthy subjects were analyzed using real-time PCR to measure mRNA expression of LFA1, MLCK, RAC1, RAPL, ROCK1, VAV1 and CXCR4. Also, mRNA expression of Tax and HBZ were evaluated. Mean expression of Tax and HBZ in ACs (asymptomatic carriers) was 0.7218 and 0.6517 respectively. The results revealed a noteworthy upregulation of these genes involved in T-cell migration among ACs patients in comparison to healthy individuals. Considering the pivotal role of gene expression alterations associated with the progression into two major diseases (ATLL or HAM/TSP), analyzing the expression of these genes in the ACs group can offer probable potential diagnostic markers and aid in monitoring the condition of ACs. [ABSTRACT FROM AUTHOR]
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- 2024
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7. Utilization of multiplex polymerase chain reaction for simultaneous and rapid detection of viral infections from different ocular structures.
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Letafati, Arash, Jazayeri, Seyed Mohammad, Atwan, Hossein, Mahmoudi, Masoud karkhaneh, Sarrafzadeh, Sheida, Ardekani, Omid Salahi, Norouzi, Mehdi, and Ghaziasadi, Azam
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HUMAN herpesvirus 2 ,HUMAN herpesvirus 1 ,VITREOUS humor ,VARICELLA-zoster virus ,VIRUS diseases - Abstract
The impact of viral keratitis (VK) on individuals and society is notable. Early diagnosis and treatment are crucial in managing viral keratitis effectively. Timely intervention with antiviral medications and supportive care can help mitigate the severity of the infection and improve visual outcomes. We examined the prevalence of varicella-zoster virus (VZV), herpes simplex virus type 1 (HSV-1), adenovirus (AdV) and herpes simplex virus type 2 (HSV-2) in patients suspected for ocular infections. Patients included in the study exhibited various clinical manifestations indicative of ocular pathology, such as infectious keratitis, corneal scar, endogenous endophthalmitis, panuveitis, endothelitis, stromal edema, and other relevant conditions. Four different types of tear fluid, corneal samples epithelium, aqueous humor and vitreous humor were taken. After genome extraction, multiplex real-time PCR was used for diagnosis of viruses. 48 (29.6%) out of the total of 162 (100%) eye specimen were positive. The dominant prevalence was VZV (12.3%) and HSV-1 (11.7%) followed by AdV (4.9%) and HSV-2 (0.6%). There were 4 (8.3%) coinfections within the samples (HSV-1 and VZV). Aqueous humor samples demonstrated superior virus detection ability and our only HSV-2 positive sample was from aqueous humor. The utilization of multiplex real-time PCR assays in differential diagnosis of VK holds promise for expeditious diagnoses while also preventing unwarranted antibiotic prescriptions. Moreover, the aqueous humor appears to be a more sensitive site for detecting viral keratitis. [ABSTRACT FROM AUTHOR]
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- 2024
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8. Unraveling the dynamic mechanisms of natural killer cells in viral infections: insights and implications.
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Letafati, Arash, Ardekani, Omid Salahi, Naderisemiromi, Mina, Norouzi, Mehdi, Shafiei, Mohammadreza, Nik, Soheil, and Mozhgani, Sayed-Hamidreza
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KILLER cells ,VIRUS diseases ,IMMUNE response ,THERAPEUTICS ,IMMUNE system - Abstract
Viruses pose a constant threat to human well-being, necessitating the immune system to develop robust defenses. Natural killer (NK) cells, which play a crucial role in the immune system, have become recognized as vital participants in protecting the body against viral infections. These remarkable innate immune cells possess the unique ability to directly recognize and eliminate infected cells, thereby contributing to the early control and containment of viral pathogens. However, recent research has uncovered an intriguing phenomenon: the alteration of NK cells during viral infections. In addition to their well-established role in antiviral defense, NK cells undergo dynamic changes in their phenotype, function, and regulatory mechanisms upon encountering viral pathogens. These alterations can significantly impact the effectiveness of NK cell responses during viral infections. This review explores the multifaceted role of NK cells in antiviral immunity, highlighting their conventional effector functions as well as the emerging concept of NK cell alteration in the context of viral infections. Understanding the intricate interplay between NK cells and viral infections is crucial for advancing our knowledge of antiviral immune responses and could offer valuable information for the creation of innovative therapeutic approaches to combat viral diseases. [ABSTRACT FROM AUTHOR]
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- 2024
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9. Correction: from discovery to treatment: tracing the path of hepatitis E virus.
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Letafati, Arash, Taghiabadi, Zahra, Roushanzamir, Mahshid, Memarpour, Bahar, Seyedi, Saba, Farahani, Ali Vasheghani, Norouzi, Masoomeh, Karamian, Saeideh, Zebardast, Arghavan, Mehrabinia, Marzieh, Ardekani, Omid Salahi, Fallah, Tina, Khazry, Fatemeh, Daneshvar, Samin Fathi, and Norouzi, Mehdi
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HEPATITIS E virus ,DIAGNOSTIC virology ,MEDICAL sciences ,RESEARCH institutes ,VIROLOGY - Abstract
This document is a correction notice for an article titled "From Discovery to Treatment: Tracing the Path of Hepatitis E Virus" published in the Virology Journal. The correction addresses an error in the affiliation of one of the authors, Arghavan Zebardast. The incorrect affiliation is listed as the Research Center for Clinical Virology, Tehran University of Medical Science, Tehran, Iran, while the correct affiliation is the Department of Virology, Faculty of Public Health, Tehran University of Medical Sciences, Tehran, Iran. The correction is provided by multiple authors and the publisher, Springer Nature, emphasizes their neutrality regarding jurisdictional claims and institutional affiliations. [Extracted from the article]
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- 2024
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10. Association Between Household Food Insecurity and Low Birth Weight: A Population-Based Case-Control Study.
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Amiri Z, Sadeghi M, Moradi A, Paydar M, Norouzi M, and Mosafarkhani E
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- Humans, Case-Control Studies, Female, Adult, Iran epidemiology, Infant, Newborn, Pregnancy, Risk Factors, Young Adult, Maternal Age, Family Characteristics, Logistic Models, Cesarean Section statistics & numerical data, Odds Ratio, Mothers statistics & numerical data, Tobacco Smoke Pollution adverse effects, Infant, Low Birth Weight, Food Insecurity
- Abstract
Background: Low birth weight (LBW) is a major public health issue associated with increased neonatal morbidity and mortality. This study aimed to examine the association between household food insecurity and LBW in Mashhad, Iran. Study Design: A population-based case-control study., Methods: This study involved 6294 mothers (3247 cases and 3247 controls) who visited healthcare centers affiliated with Mashhad University of Medical Sciences for term births between March 2019 and March 2022. Cases included women who delivered neonates weighing<2500 g, while controls delivered babies≥2500 g. Food security was measured using the validated Household Food Insecurity Access Scale. Logistic regression models examined the associations between food insecurity and LBW. Geographic information system techniques mapped LBW distribution in Mashhad., Results: Household food insecurity was significantly associated with higher odds of LBW (adjusted odds ratio [AOR]=1.25, 95% confidence interval [CI]: 1.03, 1.53). Other risk factors included younger maternal age (AOR=1.03, 95% CI: 1.01, 1.04), lower maternal education (AOR=0.55, 95% CI: 0.43, 0.71), cesarean delivery (AOR=1.70, 95% CI: 1.40, 2.06), and exposure to secondhand smoke (AOR=1.68, 95% CI: 1.02, 2.75). Gestational diabetes demonstrated a protective effect (AOR=0.37, 95% CI: 0.15, 0.91). Geographic mapping revealed that regions with higher food insecurity had elevated LBW prevalence., Conclusion: These findings underscore the importance of addressing food insecurity among pregnant women to reduce the risk of LBW and improve newborn outcomes., (© 2024 The Author(s); Published by Hamadan University of Medical Sciences. This is an open-access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.)
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- 2024
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11. Leukemia-Related Signaling Pathways Among HTLV-1-Derived Adult T Cell Leukemia/Lymphoma and Asymptomatic Carriers in Comparison to Normal Group.
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Soltani S, Mozhgani SH, Roohinezhad R, Emami SH, Emami MH, Solooki S, Fattah Hesari M, Doroozeh N, and Norouzi M
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Human T cell lymphotropic virus type 1 (HTLV-1) is associated with adult T cell leukemia/lymphoma (ATLL), a fetal malignant infection. Recently, HTLV-1 new asymptomatic carriers (ACs) have frequently been reported among blood donors. Reaching the profound concept of HTLV-1-associated molecular pathogenesis could result in finding novel therapeutic strategies. The current study aimed to determine leukemia-related signaling regulation in ATLL. Thirty participants were evaluated in 3 groups, including 10 ATLL patients, 10 ACs, and 10 normal controls. Blood samples were isolated without any chemotherapy history from ATLL patients. Also, blood samples were recovered from ACs and normal individuals. White blood cells isolation was done on the collected blood samples. After this, RNA was extracted from the prepared samples and used for the cDNA synthesis. TAX and HTLV-1 basic leucine zipper factor as viral genes and cellular genes, including MKP-1 , EVI-1 , JNK-1 , FOXO-1 , AKT-1 , DEPTOR , MTOR , and JUN , were investigated using real-time PCR. The mean age of ATLL patients was 53.2 ± 7.32 years, and 9 (90%) were male. The EVI-1 and FOXO-1 expression levels were significantly associated with ATLL patients compared with the internal control. However, the significant differences in expression of other genes in the remaining groups were not seen. Discovering viral and cellular signaling pathways that regulate HTLV-1 transformation is essential. A novel therapeutic strategy for ATLL-regulating cellular signaling pathways in vivo could be considered. Therefore, clinical trials using activators and inhibitors of related cellular signaling pathways for cell therapy of ATLL are recommended. It is recommended that more investigation be conducted on FOXO-1 and EVI-1 to target these genes and reveal the molecular pathogenesis of ATLL.
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- 2024
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