Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 20 de 56
Filter
1.
Heliyon ; 10(6): e27844, 2024 Mar 30.
Article in English | MEDLINE | ID: mdl-38524607

ABSTRACT

Thrombocytopenia, characterized by a decrease in platelet count, is a multifaceted clinical manifestation that can arise from various underlying causes. This review delves into the intriguing nexus between viruses and thrombocytopenia, shedding light on intricate pathophysiological mechanisms and highlighting the pivotal role of platelets in viral infections. The review further navigates the landscape of thrombocytopenia in relation to specific viruses, and sheds light on the diverse mechanisms through which hepatitis C virus (HCV), measles virus, parvovirus B19, and other viral agents contribute to platelet depletion. As we gain deeper insights into these interactions, we move closer to elucidating potential therapeutic avenues and preventive strategies for managing thrombocytopenia in the context of viral infections.

2.
Infez Med ; 31(4): 476-487, 2023.
Article in English | MEDLINE | ID: mdl-38075420

ABSTRACT

Multiple sclerosis (MS) is a chronic inflammatory demyelinating disorder of the central nervous system (CNS). The underlying cause of MS is still unknown. Multiple risk factors have been suggested that involve a combination of genetic, environmental, and infectious factors that contribute along with a weakened immune system. There is growing evidence supporting the potential role of viral infections in the development of the disease. Viruses like human immunodeficiency virus (HIV), John Cunningham virus (JCV), Varicella-Zoster virus (VZV), human herpesvirus 6 (HHV-6), Epstein-Barr virus (EBV), and human endogenous retroviruses (HERVs) have been proposed in the pathogenesis of MS. Their pathogenetic mechanisms are not well known, but several possibilities have been discussed. The present study highlights the proposed potential molecular and genetic mechanisms underlying this viral interaction and its implications for the development of MS.

3.
Int J Inflam ; 2023: 8175628, 2023.
Article in English | MEDLINE | ID: mdl-38074281

ABSTRACT

Materials and Methods: 130 subjects were enrolled in a case-control study at two tertiary university hospitals from Tabriz (Imam and Razi), Iran. Of these, 65 subjects were MS patients serving as the case group, and 65 subjects were healthy individuals serving as the control group. After DNA extraction from all samples, the EBER region of EBV genome was used as the primer for the detection of EBV. RNA was extracted from PBMCs, and cDNA synthesis was performed by using Sina Gene kit. Subsequently, each sample was analysed by RT-PCR with two sets of primers to detect specifically multiple sclerosis retroviruses (MSRV) env, and RT-PCR was repeated for each HERV-W env. Positive sample was used in order to confirm the result. Results: In the case group, 19 (29.2%) patients were male and 46 (70.8%) patients were female. Nevertheless, in the control group, 21 (32.3%) subjects were male and 44 (67.7%) subjects were female. No significant difference was found between groups in gender (p = 0.70). The mean range in control and case groups was 33/38 ± 9/85 and 33.18 ± 8.65, respectively. No significant difference was found between groups in age (p = 0.902). 4 (6.2%) patients in case groups were found to be positive for EBV DNA (p = 0.119). Expression of the env gene of HERVs was observed in 10 (15.38%) and two (3.07%) specimens in the case and control groups (p = 0.030), separately. A comparison of the prevalence of the HERV ENV genome between the two study groups showed a significant difference (p = 0.005). Conclusion: The results of this study failed to show any difference between MS patients and healthy controls in the rate of EBV infection. It can be concluded that the expression of HERV-W/env genes may be involved in the development of MS in these patients.

4.
BMC Res Notes ; 16(1): 311, 2023 Nov 03.
Article in English | MEDLINE | ID: mdl-37924149

ABSTRACT

OBJECTIVES: This study aimed to evaluate the antibiotic resistance patterns and prevalence of carbapenemase genes in Klebsiella pneumoniae isolates in different clinical samples from Tabriz city, northwestern Iran. RESULTS: This cross-sectional study was conducted in the Department of Microbiology, Islamic Azad University, Ahar Branch, Iran, in 2020. K. pneumoniae isolates were collected from different clinical samples, including blood, wounds, sputum, and urine. The isolates were identified using a series of standard bacteriological tests. Antibiotic resistance was determined by the disc diffusion method. The presence of blaVIM, blaNDM, blaKPC, blaOXA, and blaIMP genes were screened by polymerase chain reaction (PCR). A total of 100 non-duplicated K. pneumoniae isolates were collected from 57 urine samples, 27 blood samples, 13 wound samples, and 3 sputum samples. Overall, 70.0% of the samples were from inpatients, while 30.0% were from outpatients. The most resistance rate was related to ampicillin (94.0%), while the lowest resistance rate was related to imipenem (18.0%) and meropenem (20.0%). Overall, 25.0% of the isolates were carbapenem-resistant, of which 13.0% were resistant to both imipenem and meropenem. The PCR showed the total prevalence of 23.0% for carbapenemase genes, including 18.0% for blaKPC, 3.0% for blaVIM, 1.0% for blaIMP, and 1.0% for blaOXA gene. The blaNDM gene was not detected in any isolate. The prevalence of carbapenemase-producing K. pneumoniae isolates was relatively lower in northwestern Iran than in other regions of the country. However, special attention should be paid to the proper use of antibiotics, particularly carbapenems, to prevent further spread of antibiotic resistance and its related genes.


Subject(s)
Carbapenem-Resistant Enterobacteriaceae , Klebsiella Infections , Humans , Klebsiella pneumoniae/genetics , Meropenem , Iran/epidemiology , Cross-Sectional Studies , Microbial Sensitivity Tests , beta-Lactamases/genetics , Bacterial Proteins/genetics , Anti-Bacterial Agents/pharmacology , Carbapenems/pharmacology , Imipenem , Klebsiella Infections/drug therapy , Klebsiella Infections/epidemiology , Klebsiella Infections/microbiology
5.
Asian Pac J Cancer Prev ; 24(10): 3389-3395, 2023 Oct 01.
Article in English | MEDLINE | ID: mdl-37898842

ABSTRACT

OBJECTIVE: The most important casuse of cervical cancer incidence and high mortality rate is infection to the human papillomavirus (HPV). The aim of the present study was to investigate the effect of silencing HPV E6 oncogene on cervical cancer cells using specific siRNAs. MATERIALS AND METHODS: CaSki cervical cancer cells, carrying E6 gene, were cultured and then transfected with E6 targeting siRNAs. The cell viability through suppression of E6 expression was explored using MTT assay. Besides, apoptosis induction was investigated by means of flow cytometry using Annexin / PI staining. The changes in the expression of target genes were examined via  Real-Time PCR. RESULTS: E6 gene silencing caused a significant decrease in the survival rate of CaSki cells through remarkable enhancement of apoptosis induction. Moreover, E6 suppression led to significant upregulation of P53, Bax, Caspase-3, and Caspase-9 mRNA expression while downregulated Bcl-2 expression. Interestingly, it was found that suppression of E6 expression could lead to upregulation of  E5 and E7 expression as a compensatory mechanism for E6 deactivation. CONCLUSION: According to the results of this study, suppression of E6 expression using specific siRNAs could be considered as a therapeutic approach for cervical cancer.


Subject(s)
Oncogene Proteins, Viral , Papillomavirus Infections , Uterine Cervical Neoplasms , Female , Humans , Oncogene Proteins, Viral/genetics , Papillomavirus Infections/genetics , Repressor Proteins/genetics , Repressor Proteins/metabolism , Oncogenes , Apoptosis/genetics , RNA, Small Interfering/genetics , RNA, Small Interfering/pharmacology , Papillomavirus E7 Proteins/genetics , Cell Line, Tumor
6.
Virol J ; 20(1): 247, 2023 10 27.
Article in English | MEDLINE | ID: mdl-37891676

ABSTRACT

The Flaviviridae virus family members cause severe human diseases and are responsible for considerable mortality and morbidity worldwide. Therefore, researchers have conducted genetic screens to enhance insight into viral dependency and develop potential anti-viral strategies to treat and prevent these infections. The host factors identified by the clustered regularly interspaced short palindromic repeats (CRISPR) system can be potential targets for drug development. Meanwhile, CRISPR technology can be efficiently used to treat viral diseases as it targets both DNA and RNA. This paper discusses the host factors related to the life cycle of viruses of this family that were recently discovered using the CRISPR system. It also explores the role of immune factors and recent advances in gene editing in treating flavivirus-related diseases. The ever-increasing advancements of this technology may promise new therapeutic approaches with unique capabilities, surpassing the traditional methods of drug production and treatment.


Subject(s)
Flaviviridae , Viruses , Humans , CRISPR-Cas Systems , Host Microbial Interactions , Flaviviridae/genetics , Gene Editing , Viruses/genetics
7.
Intervirology ; 66(1): 122-135, 2023.
Article in English | MEDLINE | ID: mdl-37699384

ABSTRACT

INTRODUCTION: This research aimed to evaluate the specific microRNA (miRNA) including miR-17-5p, miRN-140-3p miR-191-5p, miR-200c-3p, and miR-N367 and cellular factors (p21, SDF-1, XCL1, CCL-2, and IL-2) in controlling replication of human immunodeficiency virus (HIV) in ECs. METHODS: The expression of miRNAs was assessed between healthy control groups and patient groups including ART-naïve HIV, HIV ART, ECs, and coinfection (HIV-HBV and HIV-HCV) via real-time PCR technique. Besides, the expression level of the nef gene and cellular factors were assessed by the ELISA method. The differences in the level of cellular factors and selected miRNAs between study groups were analyzed using the Kruskal-Wallis H or one-way ANOVA test. In addition, the potential of selected miRNAs as biomarkers for discriminating study groups was assessed by the receiver-operator characteristic (ROC) curve analysis. RESULTS: Some miRNAs in ECs, HIV ART, and healthy controls have similar expression patterns, whereas a miRNA expression profile of patient groups significantly differed compared to EC and control groups. According to ROC curve analyses, the miR-17-5p, miR-140-3p miR-191-5p, miR-200c-3p, and miR-N367 can be served as biomarkers for discriminating ECs from ART-naïve HIV-infected groups. There was a significant correlation between some miRNAs and cellular factors/the viral load as well. CONCLUSION: This report demonstrated a differentiation in the expression of selected immunological factors and cellular/viral miRNAs in ECs compared to other patient groups. Some miRNAs and cellular factors are involved in the viral replication control, immune response/modulation and can be used as biomarkers for diagnosis of ECs and differentiation with other groups. Differential expression of these miRNAs and cellular factors in different stages of HIV infection can help in finding novel ways for infection control.


Subject(s)
Coinfection , HIV Infections , Hepatitis C , MicroRNAs , Humans , MicroRNAs/genetics , MicroRNAs/metabolism , Hepatitis B virus/genetics , Hepacivirus/genetics , HIV Infections/complications , HIV , Gene Expression Profiling/methods , Biomarkers , Hepatitis C/complications
8.
Postgrad Med J ; 99(1171): 384-402, 2023 Jun 08.
Article in English | MEDLINE | ID: mdl-37294712

ABSTRACT

The increasing prevalence of obesity and overweight is a significant public concern throughout the world. Obesity is a complex disorder involving an excessive amount of body fat. It is not just a cosmetic concern. It is a medical challenge that increases the risk of other diseases and health circumstances, such as diabetes, heart disease, high blood pressure and certain cancers. Environmental and genetic factors are involved in obesity as a significant metabolic disorder along with diabetes. Gut microbiota (GM) has a high potential for energy harvesting from the diet. In the current review, we aim to consider the role of GM, gut dysbiosis and significant therapies to treat obesity. Dietary modifications, probiotics, prebiotics, synbiotics compounds, using faecal microbiota transplant, and other microbial-based therapies are the strategies to intervene in obesity reducing improvement. Each of these factors serves through various mechanisms including a variety of receptors and compounds to control body weight. Trial and animal investigations have indicated that GM can affect both sides of the energy-balancing equation; first, as an influencing factor for energy utilisation from the diet and also as an influencing factor that regulates the host genes and energy storage and expenditure. All the investigated articles declare the clear and inevitable role of GM in obesity. Overall, obesity and obesity-relevant metabolic disorders are characterised by specific modifications in the human microbiota's composition and functions. The emerging therapeutic methods display positive and promising effects; however, further research must be done to update and complete existing knowledge.


Subject(s)
Gastrointestinal Microbiome , Probiotics , Animals , Humans , Gastrointestinal Microbiome/physiology , Obesity/therapy , Probiotics/therapeutic use , Prebiotics , Body Weight
9.
Curr Med Res Opin ; 39(5): 751-760, 2023 05.
Article in English | MEDLINE | ID: mdl-37025009

ABSTRACT

Variola virus, the causing agent of smallpox, was eradicated in 1980s and today no new cases are reported. The first human infectious illness to be eliminated globally is variola. On the contrary to Variola, monkeypox, which is a zoonotic and variola-like disease, has nowadays turned to be a major health problem worldwide. VZV is a neurotropic virus and the cause of varicella (chickenpox) and herpes zoster (shingles), which is also a highly infectious disease, especially prevalent in children. These three skin diseases-monkeypox, smallpox, and chickenpox-are frequently mistaken with one another due to similar manifestations including fever, rash, myalgia, chills and headache, but they can all be distinguished by their distinctive symptoms. Although these rash-causing disorders might present different skin lesions; diagnostic tests can be extremely useful in their differentiation. We searched for these concepts on a search engine like Google Scholar, scanning the results for alternative words and phrases, and examined relevant abstracts or articles for alternative words. The clinical diagnosis of monkeypox infection is commonly made based on the occurrence pattern of its skin rash. It is possible in varicella to concurrently identify lesions in their various stages including macular, papular, vesicular, pustular, and crusts; however, monkeypox lesions are all in the same stage and evolve with the same rate. In this review, we have tried to provide a holistic and comprehensive comparison between these three skin infections with a focus on the newly epidemic monkeypox, bringing about the most recent knowledge about its features and its diagnosis.


Subject(s)
Chickenpox , Exanthema , Herpes Zoster , Mpox (monkeypox) , Smallpox , Variola virus , Child , Humans , Chickenpox/diagnosis , Chickenpox/epidemiology , Smallpox/diagnosis , Mpox (monkeypox)/diagnosis , Mpox (monkeypox)/epidemiology , Herpesvirus 3, Human , Exanthema/diagnosis
10.
Biomed Pharmacother ; 162: 114367, 2023 Jun.
Article in English | MEDLINE | ID: mdl-37018987

ABSTRACT

Despite the need for novel, effective therapeutics for the COVID-19 pandemic, no curative regimen is yet available, therefore patients are forced to rely on supportive and nonspecific therapies. Some SARS-CoV-2 proteins, like the 3 C-like protease (3CLpro) or the major protease (Mpro), have been identified as promising targets for antiviral drugs. The Mpro has major a role in protein processing as well as pathogenesis of the virus, and could be a useful therapeutic target. The antiviral drug nirmatrelvir can keep SARS-CoV-2 from replicating through inhibiting Mpro. Nirmatrelvir was combined with another HIV protease inhibitor, ritonavir, to create Paxlovid (Nirmatrelvir/Ritonavir). The metabolizing enzyme cytochrome P450 3 A is inhibited by ritonavir to lengthen the half-life of nirmatrelvir, so rintonavir acts as a pharmacological enhancer. Nirmatrelvir exhibits potent antiviral activity against current coronavirus variants, despite significant alterations in the SARS-CoV-2 viral genome. Nevertheless, there are still several unanswered questions. This review summarizes the current literature on nirmatrelvir and ritonavir efficacy in treating SARS-CoV-2 infection, and also their safety and possible side effects.


Subject(s)
COVID-19 , HIV Protease Inhibitors , Humans , Ritonavir , SARS-CoV-2 , Pandemics , COVID-19 Drug Treatment , Antiviral Agents , Peptide Hydrolases
11.
Pharmaceut Med ; 37(2): 139-151, 2023 03.
Article in English | MEDLINE | ID: mdl-36995515

ABSTRACT

The incidence of cardiovascular diseases has significantly increased with the expansion of the industrialization of societies, which is notably linked to lifestyle changes and an unhealthy diet. Hence, determining the healthiest diet habits and supplements seems to be an appropriate way to decrease the global burden of cardiovascular diseases. Currently, caffeine, one of the most widely consumed compounds in the world, has emerged with some promising results in the treatment of numerous pathophysiological conditions of cardiovascular diseases. A literature search was conducted in PubMed, Scopus, Science Direct, Google Scholar, and Web of Science databases for the relevant articles regarding the pharmacology, preclinical, and clinical studies on the potential effects of caffeine on cardiovascular diseases. While caffeine could improve cardiovascular outcomes through several mechanisms of action, the literature review revealed controversial clinical effects of caffeine on blood pressure, cardiac arrhythmias, acute coronary syndrome, stable angina, and heart failure. In the case of dyslipidemia, coffee consumption increased total cholesterol, triglyceride, and low-density lipoprotein. Taken together, the existence of multiple confounding factors in the caffeine studies has resulted in inconclusive data interpretation. Further well-designed studies with adequate control of the confounding factors are warranted to draw a clear conclusion on the cardiovascular efficacy and safety of caffeine.


Subject(s)
Caffeine , Cardiovascular Diseases , Humans , Caffeine/adverse effects , Cardiovascular Diseases/prevention & control , Cardiovascular Diseases/epidemiology , Coffee , Blood Pressure/physiology
12.
Eur J Med Res ; 28(1): 42, 2023 Jan 21.
Article in English | MEDLINE | ID: mdl-36681850

ABSTRACT

BACKGROUND: Persistent infection with high-risk Human papillomaviruses (HPV), such as hr-HPV-16 and hr-HPV-18, lead to cervical cancer, the fourth most common cancer in the world. In the present study, we investigated the alteration of E6 oncogene expression by E6-specific short interfering RNA (siRNA) combined with Oxaliplatin. METHODS: The cervical cancer cell line, CaSki, was transfected with E6-siRNA, then treated with Oxaliplatin. The cellular genes, such as p53, MMP9, Nanog, and caspases expression, were assessed by quantitative real-time PCR. The cell death rate, cell cycle, and cell viability were assessed by Annexin V/PI staining, DAPI staining, and MTT test, respectively. Furthermore, colony formation assay and scratch test determined the stemness ability and cell metastasis, respectively. RESULTS: Combination therapy increased the re-expression of genes involved in the p53-dependent apoptosis pathway (increase in apoptosis to 44.2%), and reduced stemness and metastasis ability compared to either siRNA or Oxaliplatin monotherapy. Together, our results demonstrate that E6-siRNA and Oxaliplatin combination increased the cervical cancer cells' sensitivity to Oxaliplatin and decreased the survival rate, proliferation, and metastasis, and consequently escalated apoptosis rate, induced cell cycle arrest in the sub-G1 stage, and reduced the chemotherapy drug dosage. CONCLUSION: Inhibition of E6 oncogene expression and subsequent E6-siRNA with Oxaliplatin combination therapy could be a novel strategy for cervical cancer treatment.


Subject(s)
Oncogene Proteins, Viral , Uterine Cervical Neoplasms , Female , Humans , RNA, Small Interfering/genetics , RNA, Small Interfering/metabolism , RNA, Small Interfering/pharmacology , Oxaliplatin/pharmacology , Oxaliplatin/therapeutic use , Oxaliplatin/metabolism , Uterine Cervical Neoplasms/drug therapy , Uterine Cervical Neoplasms/genetics , Human papillomavirus 16/genetics , Human papillomavirus 16/metabolism , Tumor Suppressor Protein p53/genetics , Oncogene Proteins, Viral/genetics , Oncogene Proteins, Viral/metabolism , Apoptosis/genetics
13.
Postgrad Med ; 135(2): 102-120, 2023 Mar.
Article in English | MEDLINE | ID: mdl-36567602

ABSTRACT

Currently, the world is recovering from the shock of the coronavirus disease 2019 (COVID-19) pandemic; however, this situation is still fragile. Health authorities recommend administering COVID-19 vaccines as the safest and most reliable tool for eliminating COVID-19. Subsequent to the extensive administration of the COVID-19 vaccines, a series of cardiovascular adverse effects have been reported. This comprehensive review aimed to provide an update on the etiology, pathophysiology, clinical features, and management of the cardiovascular adverse events associated with COVID-19 vaccines, including myocarditis, pericarditis, thrombosis with thrombocytopenia syndrome, myocardial infarction, cardiac arrhythmias, hypertension, and stress-induced cardiomyopathy. The benefits of COVID-19 vaccination far outweigh the reported adverse events. It would be clinically important to provide diagnostic scoring systems to differentiate COVID-19-related cardiovascular adverse events from other causes and develop therapeutic approaches for their management. Further evaluation of cardiovascular adverse events of the COVID-19 vaccines is crucial for implementing vaccination programs and developing safer and more reliable vaccines.


Subject(s)
COVID-19 , Drug-Related Side Effects and Adverse Reactions , Hypertension , Humans , COVID-19 Vaccines , Vaccination
14.
Can J Gastroenterol Hepatol ; 2022: 4291758, 2022.
Article in English | MEDLINE | ID: mdl-36531832

ABSTRACT

Following the SARS-CoV-2 outbreak and the subsequent development of the COVID-19 pandemic, organs such as the lungs, kidneys, liver, heart, and brain have been identified as priority organs. Liver diseases are considered a risk factor for high mortality from the COVID-19 pandemic. Besides, liver damage has been demonstrated in a substantial proportion of patients with COVID-19, especially those with severe clinical symptoms. Furthermore, antiviral medications, immunosuppressive drugs after liver transplantation, pre-existing hepatic diseases, and chronic liver diseases such as cirrhosis have also been implicated in SARS-CoV-2-induced liver injury. As a result, some precautions have been taken to prevent, monitor the virus, and avoid immunocompromised and susceptible individuals, such as liver and kidney transplant recipients, from being infected with SARS-CoV-2, thereby avoiding an increase in mortality. The purpose of this review was to examine the impairment caused by SARS-CoV-2 infection and the impact of drugs used during the pandemic on the mortality range and therefore the possibility of preventive measures in patients with liver disease.


Subject(s)
COVID-19 , Liver Diseases , Humans , Pandemics , SARS-CoV-2 , Liver Diseases/therapy , Antiviral Agents/therapeutic use , Antiviral Agents/pharmacology
15.
Expert Rev Mol Diagn ; 22(9): 881-894, 2022 09.
Article in English | MEDLINE | ID: mdl-36224104

ABSTRACT

INTRODUCTION: Nanoparticle-based biosensors (NPBs) are point-of-care diagnostic platforms that can be used for detection of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) with high accuracy. AREAS COVERED: EBSCOhost Web, Embase, ProQuest, PubMed/MEDLINE, Scopus, Web of Science, and WHO Global Literature on Coronavirus Disease 2019 (COVID-19) were searched for relevant records published from 1 November 2019 to 30 April 2022. Records reporting original data on the accuracy of clinically applied nanoparticle-based biosensors at detecting SARS-CoV-2 RNA and surface proteins from pharyngeal swab specimens were considered. Findings were reported based on the PRISMA 2020 statement. The QUADAS-2 tool was used for assessment of quality and risk of bias among the included studies. EXPERT OPINION: A total of 50 relevant records were identified, of which 13 were included. The included studies explored the diagnostic performance of 13 clinically applied distinct nanoparticle-based biosensors in a total of 789 pharyngeal swabs collected from 376 COVID-19 patients and 413 otherwise healthy individuals. The mean sensitivity, specificity, and accuracy were 97.07%, 94.43%, and 96.91%, respectively, in comparison to RT-qPCR as the reference test. Considering their ease-of-operation, portability, low-cost manufacturing, NPBs could be considered suitable candidate diagnostic platforms for substituting RT-qPCR.


Subject(s)
Biosensing Techniques , COVID-19 , Nanoparticles , Humans , SARS-CoV-2/genetics , Reverse Transcriptase Polymerase Chain Reaction , COVID-19/diagnosis , RNA, Viral/genetics , COVID-19 Testing , Membrane Proteins/genetics , Sensitivity and Specificity
16.
Adv Exp Med Biol ; 1401: 97-162, 2022.
Article in English | MEDLINE | ID: mdl-35781219

ABSTRACT

Autophagy is known as a conserved self-eating mechanism that contributes to cells to degrade different intracellular components (i.e., macromolecular complexes, aggregated proteins, soluble proteins, organelles, and foreign bodies). Autophagy needs formation of a double-membrane structure, which is composed of the sequestered cytoplasmic contents, called autophagosome. There are a variety of internal and external factors involved in initiation and progression of autophagy process. Viruses as external factors are one of the particles that could be associated with different stages of this process. Viruses exert their functions via activation and/or inhibition of a wide range of cellular and molecular targets, which are involved in autophagy process. Besides viruses, a variety of cellular and molecular pathways that are activated and inhibited by several factors (e.g., genetics, epigenetics, and environment factors) are related to beginning and developing of autophagy mechanism. Exosomes and microRNAs have been emerged as novel and effective players anticipated in various stages of autophagy. More knowledge in these pathways and identification of accurate roles of them could help to provide better therapeutic approaches in several diseases such as cancer. We highlighted the roles of viruses, exosomes, and microRNAs in the autophagy processes.


Subject(s)
Exosomes , MicroRNAs , Viruses , Exosomes/metabolism , MicroRNAs/metabolism , Autophagy/physiology , Autophagosomes/metabolism
17.
Can J Infect Dis Med Microbiol ; 2022: 3838857, 2022.
Article in English | MEDLINE | ID: mdl-35800327

ABSTRACT

Regardless of the extensive screening for the detection of hepatitis B surface antigen (HBsAg), hemodialysis (HD) patients are still severely at the risk of occult hepatitis B virus infection (OBI), especially in developing countries. OBI is defined as the presence of HBV DNA with undetectable HBsAg in the liver and/or Serum. This study aims to determine the prevalence of OBI in HD patients in Tabriz Province, northwest of Iran, and inquire about the mutations in the detected HBsAg. In this cross-sectional descriptive study, ELISA method assessed serum and plasma samples of 118 HBsAg-negative patients undergoing HD treatment for HBV serological markers (HBsAg and Anti-HBc). Specific primers by nested polymerase chain reaction have been utilized to examine HBV DNA; also, direct sequencing of surface genes was carried out to characterize the viral genotypes and S gene mutations. Finally, followed by real-time PCR, the quantity of viral load in OBI-positive patients was determined. A total of 118 HD patients were included (63.6% were male and 36.4% female), with an overall mean age of 60.8 ± 12.8 years old. The prevalence of antihepatitis B core antibody (Anti-HBc) in the study population was 26.3% (31/118). Five patients (4.2%) were positive for HBV DNA and labeled OBI-positive; their plasma HBV-DNA load was less than 100 IU/ml. Following the phylogenetic analysis, the samples with OBI roughly belonged to genotype D, subtype ayw2 and only two had mutations within the S 'gene's major hydrophilic region (MHR), including T123I, C124F, and P127T. This study reports the prevalence of OBI in the HBsAg-negative HD patients being at a rate of 4.2%, which can be a clinically vital consideration in this region. HBV serologic screening approaches need to be renewed to cover nucleic acid testing in the setting of hemodialysis and all the other high-risk groups associated with it (i.e., blood and organ donors).

18.
Clin Nutr ESPEN ; 50: 133-137, 2022 08.
Article in English | MEDLINE | ID: mdl-35871914

ABSTRACT

BACKGROUND & AIMS: Metabolic syndrome (MetS) is an expanding public health problem worldwide and is reasoned one of the risk factors of cardiovascular disease. Recent evidence suggests that dysbiosis of the gut microbiota may play an essential role in metabolic disorders. The objective of this study was to assess the differences in the two gut dominant phyla and a gut-associated phage between MetS and healthy control subjects. METHODS: The study included 60 subjects among whom 30 were MetS, and 30 were healthy control subjects. The entire studied group was subjected to clinical, laboratory assessment, and anthropometric evaluation. Stool samples were collected from both MetS and healthy control subjects. The Firmicutes, Bacteroidetes, and crAssphage were assessed by quantitative PCR (qPCR). RESULTS: The MetS group had significantly higher body mass index, fasting plasma glucose, triglyceride, and waist circumference were compared with healthy controls (Pv < 0.05). The relative abundance of the Firmicutes phyla and crAssphage were high in the MetS group and only crAssphage were statistically significantly high in the MetS group compared to the healthy controls (Pv < 0.05). The quantity of Bacteroidetes phyla was low in the MetS group compared to the healthy controls, though there were no significant differences between the two groups (Pv > 0.05). CONCLUSION: The results of this study indicate that adults with MetS have a different gut microbial composition in comparison to healthy controls. This could be probably considered when creating approaches to control MetS by modifying the gut microbiota.


Subject(s)
Bacteriophages , Gastrointestinal Microbiome , Metabolic Syndrome , Adult , Bacteriophages/genetics , Dysbiosis , Humans , Waist Circumference
19.
World J Virol ; 11(3): 113-128, 2022 May 25.
Article in English | MEDLINE | ID: mdl-35665236

ABSTRACT

Since December 2019, a novel coronavirus that represents a serious threat to human lives has emerged. There is still no definite treatment for severe cases of the disease caused by this virus, named coronavirus disease 2019 (COVID-19). One of the most considered treatment strategies targets the exaggerated immune regulator, and interleukin (IL)-6 is a crucial pro-inflammatory mediator. Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) cases show an elevated level of IL-6 related to disease severity. IL-6 activity can be inhibited by the following: IL-6 itself, IL-6 signaling pathways such as Janus kinase and signal transducer and activator of transcription (JAK-STAT), gp130, IL-6R, and downstream activated ILs, such as IL-17 and IL-6 cytokine. Currently, according to these studies and their results, IL-6 blockade with anti-IL-6 or its receptor antibodies such as tocilizumab in COVID-19 is beneficial in severe cases and may reduce the mortality rate. JAK-STAT inhibitors block the cytokine storm by inhibiting several crucial pro-inflammatory mediators such as TNF-α and IL-6 and have shown various results in clinical trials. IL-6 induces IL-17 secretion, and IL-17 is involved in the pathogenesis of inflammatory processes. Clinical trials of anti-IL-17 drugs are currently recruiting, and anti-gp130 antibody is preclinical. However, this agent has shown positive effects in inflammatory bowel disease clinical trials and could be tested for SARS-CoV-2. This study aimed to review the role of IL-6 in the cytokine storm and studies regarding IL-6 and blockade of its inflammatory pathways in COVID-19 to determine if any of these agents are beneficial for COVID-19 patients.

20.
Int Immunopharmacol ; 108: 108896, 2022 Jul.
Article in English | MEDLINE | ID: mdl-35640377

ABSTRACT

Viruses may transform infected cells into benign or malignant tumors, promoting cell growth and survival via various intracellular pathways. Some oncogenic DNA viruses, such as human papillomaviruses, can lead to squamous intraepithelial lesions and cervical cancer. Furthermore, the early HPV virus'soncoproteins have been attributed to cancer initiation and development and tumor-enhancing action. In addition to viral oncoproteins, antigen-presenting cells (APC) and the number of clusters of differentiation (CD) markers expressed on their surface play an essential role in disease progression or tumorigenesis inhibition. This article discussed the function of CD markers in the interaction between APCs and cancer cells, immune cells' function in the infection process, and finally infected cells' malignancy. We investigated targeting these markers as a novel insight to create a new therapeutic or diagnosis strategy to prevent cervical cancer progression.


Subject(s)
Papillomavirus Infections , Uterine Cervical Neoplasms , Antigen-Presenting Cells , Female , Humans , Papillomaviridae/genetics , Prognosis , Uterine Cervical Neoplasms/pathology
SELECTION OF CITATIONS
SEARCH DETAIL
...