Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 19 de 19
Filtrar
Mais filtros








Base de dados
Intervalo de ano de publicação
1.
Toxicol In Vitro ; 93: 105687, 2023 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-37659683

RESUMO

This study aimed to investigate the effects of glycyrrhizic acid (GL) on the anticancer activity of cisplatin in A2780 ovarian cancer cells. Cultured A2780 cells were treated with different concentrations of GL and cisplatin individually and in combination. The MTT assay, flow cytometry, wound-healing, and clonogenic assay, were used to determine cell viability, apoptosis, migration, and colony formation, respectively. The effects on superoxide dismutase (SOD) activity were also evaluated. QPCR was used to study the effects of individual and combined treatments with GL and cisplatin on the expression levels of migration genes (MMP2 and MMP9), and some apoptosis pathway genes (caspase-3, -8, -9, and BCL2). A synergistic effect was observed between GL and cisplatin (CI < 1). Combination therapy was significantly more effective in reducing cell viability, suppressing migration and colony formation, inducing apoptosis, and altering gene expression compared to single therapies. GL significantly increased SOD activity. The relative expression of caspase -3, -8, and - 9 increased significantly, and the expression levels of MMP2 and MMP9 decreased significantly in the treated cells. Our results indicate that GL enhances the anticancer activity of cisplatin in the A2780 cell line. Therefore, the combination of GL and cisplatin can be proposed as a promising therapeutic strategy for ovarian cancer.


Assuntos
Antineoplásicos , Neoplasias Ovarianas , Humanos , Feminino , Cisplatino/farmacologia , Neoplasias Ovarianas/tratamento farmacológico , Neoplasias Ovarianas/metabolismo , Metaloproteinase 2 da Matriz/genética , Metaloproteinase 9 da Matriz/genética , Ácido Glicirrízico/farmacologia , Linhagem Celular Tumoral , Resistencia a Medicamentos Antineoplásicos , Apoptose , Superóxido Dismutase/genética , Antineoplásicos/farmacologia , Antineoplásicos/uso terapêutico , Proliferação de Células
2.
Curr Mol Pharmacol ; 16(1): 2-14, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-35331128

RESUMO

BACKGROUND: Due to their plasticity, macrophages exert critical effects on both promoting and suppressing inflammatory processes. Pathologic inflammatory conditions are frequently correlated with dynamic alterations in macrophage activation, with classically activated M1 cells associated with the promotion and maintenance of inflammation and M2 cells being linked to the resolution or smouldering of chronic inflammation. Inflammation deputes a common feature of various chronic diseases and the direct involvement in the insurgence and development of these conditions. Macrophages participate in an autoregulatory loop characterizing the inflammatory process, as they produce a wide range of biologically active mediators that exert either deleterious or beneficial effects during the inflammation. Therefore, balancing the favorable ratios of M1/M2 macrophages can help ameliorate the inflammatory landscape of pathologic conditions. Curcumin is a component of turmeric with many pharmacological properties. OBJECTIVE: Recent results from both in-vivo and in-vitro studies have indicated that curcumin can affect polarization and/or functions of macrophage subsets in the context of inflammation-related diseases. There is no comprehensive review of the impact of curcumin on cytokines involved in macrophage polarization in the context of inflammatory diseases. The present review will cover some efforts to explore the underlying molecular mechanisms by which curcumin modulates the macrophage polarization in distant pathological inflammatory conditions, such as cancer, autoimmunity, renal inflammation, stroke, atherosclerosis, and macrophage-driven pathogenesis. RESULTS: The accumulation of the findings from in vitro and in vivo experimental studies suggests that curcumin beneficially influences M1 and M2 macrophages in a variety of inflammatory diseases with unfavorable macrophage activation. CONCLUSION: Curcumin not only enhances anti-tumor immunity (via shifting M polarization towards M1 phenotype and/or up-regulation of M1 markers expression) but ameliorates inflammatory diseases, including autoimmune diseases (experimental autoimmune myocarditis and Behcet's disease), nephropathy, chronic serum sickness, stroke, and atherosclerosis.


Assuntos
Aterosclerose , Curcumina , Humanos , Curcumina/farmacologia , Curcumina/uso terapêutico , Ativação de Macrófagos , Macrófagos , Inflamação/tratamento farmacológico
3.
Lupus ; 32(3): 363-379, 2023 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-36573333

RESUMO

BACKGROUND: Traditionally, the diagnosis and monitoring of disease activity in systemic lupus erythematosus (SLE) are contingent upon clinical manifestations and serological markers. However, researchers are struggling to find biomarkers with higher sensitivity and specificity. DNA methylation has been the most studied epigenetic feature in SLE. So, in this study, we performed a systematic review of studies about DNA methylation alterations in SLE patients compared to healthy controls. METHODS: By searching PubMed, Scopus, and Google Scholar up to July 2022, all case-control studies in which DNA methylation of specific genes was assessed by a non-high-throughput technique and passed the quality of bias assessment were included. RESULTS: In total, 44 eligible studies underwent a data extraction process. In all, 3471 SLE patients and 1028 healthy individuals were included. Among the studies that reported the patients' gender (n = 2853), 89.41% were female and 10.59% were male. Forty studies have been conducted on adult patients. The number of works on fractionated and unfractionated blood cells was almost equal. In this regard, 22 studies were conducted on whole blood or peripheral blood mononuclear cells and two studies on unfractionated white blood cells. Sorted blood cells were biological sources in 20 studies. The most investigated gene was IFI44L. Sensitivity, specificity, and diagnostic power of methylation levels were only reported for IFI44L in five studies. The most employed methylation profiling method was bisulfite sequencing polymerase chain reaction. The correlation between methylation patterns and clinical parameters was explored in 22 studies, which of them 16 publications displayed a remarkable association between DNA methylation status and clinical indices. CONCLUSIONS: The methylation status of some genes especially IFI44L, FOXP3, and MX1 has been suggested as promising SLE biomarkers. However, given the conflicting findings between studies because of potential confounders such as different sample types, methylation profiling methods, and ethnicity as well as shared DNA methylation patterns of SLE and other autoimmune diseases, DNA methylation biomarkers are currently not reliable diagnostic biomarkers and do not represent surrogate markers of SLE disease activity. Future investigations on a larger scale with the discarding of limitations of previous studies would probably lead to a consensus.


Assuntos
Metilação de DNA , Lúpus Eritematoso Sistêmico , Adulto , Humanos , Masculino , Feminino , Leucócitos Mononucleares , Marcadores Genéticos , Estudos de Casos e Controles
4.
Adv Biomed Res ; 12: 256, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-38192881

RESUMO

Background: Early colorectal cancer (CRC) diagnosis can drastically reduce CRC-related morbidity and mortality. In this regard, increasing attention is now being directed to DNA-based tests, especially the evaluation of methylation levels, to prioritize high-risk suspected persons for colonoscopy examination. Therefore, we aimed to assess the accuracy of MGMT gene promoter methylation levels in peripheral blood mononuclear cells (PBMCs) for distinguishing CRC patients from healthy people. Materials and Methods: For this study, a total of seventy individuals with CRC and 75 healthy individuals from Iran were included. The methylation level of MGMT in the DNA isolated from PBMCs was evaluated using the methylation quantification endonuclease-resistant DNA technique. To assess the diagnostic capability of the MGMT promoter methylation level, a receiver operating characteristic (ROC) curve was generated. Results: The mean promoter methylation level of MGMT in the CRC and control groups was, respectively, 27.83 ± 22.80 vs. 12.36 ± 14.48. The average percentage of methylation of the MGMT promoter between the CRC and control groups was significantly different (P < 0.001). Also, the MGMT promoter was more hypermethylated in female patients than in males. ROC analyses indicated that the diagnostic power of the MGMT promoter methylation level for CRC was 0.754, with a sensitivity of 81.43% and a specificity of 75.71%, indicating a good biomarker for CRC diagnosis. Conclusion: Methylation evaluation of MGMT in PBMCs could be utilized as a diagnostic biomarker with high accuracy for prioritizing suspected CRC patients before colonoscopy.

5.
Lupus ; 31(8): 903-909, 2022 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-35475371

RESUMO

OBJECTIVE: Over the past decades, TNIP1 has been identified as a strong risk locus in multiple genome-wide association studies (GWAS), spanning multiple populations and various autoimmune diseases. TNIP1 is a polyubiquitin-binding protein that works as a physiological inhibitor of NF-κB and maintains immune homeostasis. Some studies have confirmed that TNIP1 is downregulated in autoimmune diseases such as rheumatoid arthritis (RA) and systemic lupus erythematosus (SLE). In the current study, for the first time, we evaluated the possible association between rs6889239 polymorphism in the TNIP1 gene with the risk and clinical characteristics of RA and SLE in the Iranian population. METHOD: In this case-control study, 115 patients with RA, 115 patients with SLE, and 115 unrelated healthy subjects were enrolled to estimate rs6889239 genotypes with real-time PCR high resolution melting (HRM) method. RESULTS: Our results demonstrated considerable associations between CC genotype and C allele of rs6889239 with augmented risk of SLE (OR for CC genotype= 2.23; 95%CI [1.175-4.307], OR for C allele= 1.84; 95%CI [1.254-2.720]). However, there was an insignificant association between genotypes and allele frequencies of rs6889239 with the occurrence risk of RA in the population under study (p > 0.05). Additionally, stratification analysis specified that the C allele in rs6889239 was linked with the incidence of renal involvement in SLE patients and lower age of onset in the RA group (p < 0.05). CONCLUSION: These findings propose a significant association between TNIP1 polymorphism and higher risk of SLE and some clinical characteristics of RA and SLE.


Assuntos
Artrite Reumatoide , Lúpus Eritematoso Sistêmico , Artrite Reumatoide/genética , Estudos de Casos e Controles , Proteínas de Ligação a DNA , Frequência do Gene , Predisposição Genética para Doença , Estudo de Associação Genômica Ampla , Genótipo , Humanos , Irã (Geográfico) , Lúpus Eritematoso Sistêmico/genética , Polimorfismo de Nucleotídeo Único , Fatores de Transcrição
6.
Comb Chem High Throughput Screen ; 25(2): 211-228, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-33390101

RESUMO

The precise and exquisite architecture of the retina is directly related to vision. Therefore, any mechanisms associated with disruption of retinal structure could affect the quality of vision. A large number of studies indicated that several cellular and molecular processes are involved in retina pathogenesis. Among different risk factors reported as important players in retina diseases, deregulation of epigenetic contributors has critical roles in the pathogenesis of these diseases. MicroRNAs (miRNAs) are a type of small non-coding RNAs that are involved in various signaling pathways involved in retina diseases. These molecules exert their function by targeting a sequence of cellular and molecular signals. Long-non coding RNAs (lncRNAs) and circular RNAs are other non-coding RNAs, which can exert their regulatory roles via miRNA sponging. In this regard, it has been showed that miRNA sponging could modulate a variety of pathways in retinal diseases. Besides miRNAs, exosomes are other players in the pathogenesis of retinal diseases. Exosomes are biological vectors that could carry their cargos to recipient cells. The cargos of exosomes (i.e., proteins, lncRNAs, miRNAs, and fragments of DNA) change behaviors of host cells. Here, we summarized the roles of miRNAs, miRNAs sponging and exosomes in the pathogenesis of retinal diseases.


Assuntos
Exossomos , MicroRNAs , RNA Longo não Codificante , Doenças Retinianas , Exossomos/genética , Exossomos/metabolismo , Exossomos/patologia , Humanos , MicroRNAs/genética , MicroRNAs/metabolismo , RNA Longo não Codificante/genética , Doenças Retinianas/diagnóstico , Doenças Retinianas/genética , Doenças Retinianas/metabolismo , Transdução de Sinais
7.
J Oncol ; 2021: 3408937, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34721577

RESUMO

Ovarian cancer is the major cause of gynecologic cancer-related mortality. Regardless of outstanding advances, which have been made for improving the prognosis, diagnosis, and treatment of ovarian cancer, the majority of the patients will die of the disease. Late-stage diagnosis and the occurrence of recurrent cancer after treatment are the most important causes of the high mortality rate observed in ovarian cancer patients. Unraveling the molecular mechanisms involved in the pathogenesis of ovarian cancer may help find new biomarkers and therapeutic targets for ovarian cancer. MicroRNAs (miRNAs) are small noncoding RNAs that regulate gene expression, mostly at the posttranscriptional stage, through binding to mRNA targets and inducing translational repression or degradation of target via the RNA-induced silencing complex. Over the last two decades, the role of miRNAs in the pathogenesis of various human cancers, including ovarian cancer, has been documented in multiple studies. Consequently, these small RNAs could be considered as reliable markers for prognosis and early diagnosis. Furthermore, given the function of miRNAs in various cellular pathways, including cell survival and differentiation, targeting miRNAs could be an interesting approach for the treatment of human cancers. Here, we review our current understanding of the most updated role of the important dysregulation of miRNAs and their roles in the progression and metastasis of ovarian cancer. Furthermore, we meticulously discuss the significance of miRNAs as prognostic and diagnostic markers. Lastly, we mention the opportunities and the efforts made for targeting ovarian cancer through inhibition and/or stimulation of the miRNAs.

8.
Iran J Basic Med Sci ; 24(5): 561-576, 2021 May.
Artigo em Inglês | MEDLINE | ID: mdl-34249257

RESUMO

Considering the high incidence and mortality rate of gastrointestinal cancers (GIs) worldwide and partial success of the current available GI cancer treatments, there is a necessity to discover more effective approaches in cancer therapy. The failure in conventional therapies seems to be related to the resistance of cancer cells to chemotherapy, inability to target tumor cells especially in metastatic cancers, deficient drug concentrations in tumor sites, and unfavorable effects on pivotal non-malignant bodily tissues following systemic administration. In this context, we need an appropriate carrier for the delivery of therapeutic agents specifically to the GI cancer site. Mesenchymal stem cells (MSCs), a prominent cell-based strategy for cancer treatment, overcome various cancer therapy limitations and could be used as vehicles to deliver many anticancer agents such as therapeutic genes (DNA or interference RNA), oncolytic viruses, and chemotherapeutic or nanoparticle drugs. Moreover, secreted molecules of unmodified MSCs lead to deregulation of several proteins and different signaling pathways eradicating cancer cells. In the present review, at first, we overview the characteristics and utility of MSCs in cancer therapy, secondly, we discuss the application of naïve MSCs and utilization of MSCs in the delivery of therapeutic agents in GI cancer therapy and, finally, more information about harnessing of genetically modified MSCs in GI cancer treatment will be presented.

9.
Eur J Obstet Gynecol Reprod Biol ; 264: 189-199, 2021 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-34325214

RESUMO

OBJECTIVE: Great attention is currently paid to both the pathogenetic mechanisms and non-invasive prenatal diagnosis (NIPD) of Down syndrome (DS). It has been posited that dysregulation of epigenetic signatures including DNA methylation and microRNAs (miRNAs) crucially contribute to the pathomechanism of DS. Therefore, we aimed to perform a systematic review of case-control publications that have examined the differences in epigenetic landscape between pregnancies bearing euploid fetuses and those affected with DS to provide a focused insight into the pathophysiology of DS and also novel biomarkers for NIPD of DS. STUDY DESIGN: Pertinent keywords were utilized to search into PubMed, Scopus, and Google Scholar. We enrolled studies that have compared the pattern of miRNAs expression profile or DNA methylation between pregnant women who carries DS fetuses and those with euploid fetuses. RESULTS: An assessment of 599 articles resulted in, finally, 18 eligible studies (12 miRNAs and 6 DNA methylation). The most investigated miRNAs were those that are encoded by genes on chromosome 21 and more hypermethylation regions in DS fetuses than euploids with nearly evenly distribution on all chromosomes were found. Distinct mechanisms with potential therapeutic purposes have been put forward for the involvement of epigenetic perturbations in the etiopathogenesis of DS. CONCLUSION: There is a disagreement in the recruiting of epigenetic biomarkers for NIPD of DS. This heterogeneity in results of the qualified publications emanates from confounding factors such as differences in demographic data of participants, analytical platforms, and study design. Hence, before harnessing epigenetic signatures for NIPD of DS, more experiments are required.


Assuntos
Síndrome de Down , MicroRNAs , Estudos de Casos e Controles , Metilação de DNA , Síndrome de Down/genética , Epigênese Genética , Feminino , Humanos , MicroRNAs/genética , Gravidez
10.
J Med Virol ; 93(9): 5458-5473, 2021 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-33969513

RESUMO

Kawasaki-like disease (KLD) and multisystem inflammatory syndrome in children (MIS-C) are considered as challenges for pediatric patients under the age of 18 infected with coronavirus disease 2019 (COVID-19). A systematic search was performed on July 2, 2020, and updated on December 1, 2020, to identify studies on KLD/MIS-C associated with COVID-19. The databases of Scopus, PubMed, Web of Science, Embase, and Scholar were searched. The hospitalized children with a presentation of Kawasaki disease (KD), KLD, MIS-C, or inflammatory shock syndromes were included. A total number of 133 children in 45 studies were reviewed. A total of 74 (55.6%) cases had been admitted to pediatric intensive care units (PICUs). Also, 49 (36.8%) patients had required respiratory support, of whom 31 (23.3%) cases had required mechanical ventilation/intubation, 18 (13.5%) cases had required other oxygen therapies. In total, 79 (59.4%) cases had been discharged from hospitals, 3 (2.2%) had been readmitted, 9 (6.7%) had been hospitalized at the time of the study, and 9 (6.7%) patients had expired due to the severe heart failure, shock, brain infarction. Similar outcomes had not been reported in other patients. Approximately two-thirds of the children with KLD associated with COVID-19 had been admitted to PICUs, around one-fourth of them had required mechanical ventilation/intubation, and even some of them had been required readmissions. Therefore, physicians are strongly recommended to monitor children that present with the characteristics of KD during the pandemic as they can be the dominant manifestations in children with COVID-19.


Assuntos
Infarto Encefálico/complicações , COVID-19/complicações , Insuficiência Cardíaca/complicações , Síndrome de Linfonodos Mucocutâneos/complicações , SARS-CoV-2/patogenicidade , Choque/complicações , Síndrome de Resposta Inflamatória Sistêmica/complicações , Adolescente , Infarto Encefálico/diagnóstico por imagem , Infarto Encefálico/mortalidade , Infarto Encefálico/virologia , COVID-19/diagnóstico por imagem , COVID-19/mortalidade , COVID-19/virologia , Criança , Pré-Escolar , Feminino , Insuficiência Cardíaca/diagnóstico por imagem , Insuficiência Cardíaca/mortalidade , Insuficiência Cardíaca/virologia , Humanos , Lactente , Recém-Nascido , Unidades de Terapia Intensiva Pediátrica , Masculino , Síndrome de Linfonodos Mucocutâneos/diagnóstico por imagem , Síndrome de Linfonodos Mucocutâneos/mortalidade , Síndrome de Linfonodos Mucocutâneos/virologia , Readmissão do Paciente/estatística & dados numéricos , Respiração Artificial , SARS-CoV-2/fisiologia , Choque/diagnóstico por imagem , Choque/mortalidade , Choque/virologia , Análise de Sobrevida , Síndrome de Resposta Inflamatória Sistêmica/diagnóstico por imagem , Síndrome de Resposta Inflamatória Sistêmica/mortalidade , Síndrome de Resposta Inflamatória Sistêmica/virologia
11.
Iran J Allergy Asthma Immunol ; 20(2): 178-187, 2021 Apr 17.
Artigo em Inglês | MEDLINE | ID: mdl-33904676

RESUMO

The nucleotide-binding oligomerization domain 2 (NOD2) is the key regulator of inflammatory responses and has been involved in the pathogenesis of rheumatoid arthritis (RA). Laboratory and in silico evaluations have demonstrated that some polymorphisms in 3'UTR of NOD2 gene could influence the secondary structure of this region and similarly thermodynamic features of hybridization site and finally deregulate the expression of NOD2. In the current study, for the first time, we evaluated the possible association between single nucleotide polymorphisms (SNPs) rs3135500 and rs3135499 in the NOD2 gene with RA risk in the Iranian population. One hundred and fifteen patients with RA and 120 healthy subjects were recruited in this case-control study. Genotyping of rs3135500 and rs3135499 polymorphisms were accomplished using the real­time polymerase chain reaction high resolution melting (HRM) method. We found a substantial association of AA and AG genotypes in rs3135500 with the risk of RA (AA vs GG; OR=5.547; 95%CI [2.564-11.999]; p<0.001 and AG vs GG; OR=2.179; 95%CI [1.145-4.147]; p=0.017). Moreover, in the patient group, there was a significant relationship between the increased concentration of erythrocyte sedimentation rate (ESR) and C-reactive protein (CRP) with rs3135500 (A allele) (p<0.05). However, there were no important associations between rs3135499 with the risk of RA (p>0.05). However, we found a noteworthy association of the C allele in rs3135499 with an increased level of CRP in patients (p>0.05). Our findings propose a considerable association between NOD2 polymorphisms with increased risk of RA and disease activity.


Assuntos
Artrite Reumatoide/genética , MicroRNAs/genética , Proteína Adaptadora de Sinalização NOD2/genética , Adulto , Idoso , Artrite Reumatoide/sangue , Sítios de Ligação , Proteína C-Reativa/análise , Estudos de Casos e Controles , Feminino , Frequência do Gene , Predisposição Genética para Doença , Genótipo , Humanos , Irã (Geográfico) , Masculino , Pessoa de Meia-Idade , Polimorfismo de Nucleotídeo Único
12.
Curr Pharm Des ; 27(28): 3161-3169, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33902409

RESUMO

DNA damage usually happens in all cell types, which may originate from endogenous sources (i.e., DNA replication errors) or be emanated from radiations or chemicals. These damages range from changes in few nucleotides to significant structural abnormalities on chromosomes and, if not repaired, could disturb the cellular homeostasis or cause cell death. As the most significant response to DNA damage, DNA repair provides biological pathways by which DNA damages are corrected and returned into their natural circumstance. However, an aberration in the DNA repair mechanisms may result in genomic and chromosomal instability and the accumulation of mutations. The activation of oncogenes and/or inactivation of tumor suppressor genes is a serious consequence of genomic and chromosomal instability and may bring the cells into a cancerous phenotype. Therefore, genomic and chromosomal instability is usually considered a crucial factor in carcinogenesis and an important hallmark of various human malignancies. In the present study, we review our current understanding of the most updated mechanisms underlying genomic instability in cancer and discuss the potential promises of these mechanisms in finding new targets for the treatment of cancer.


Assuntos
Instabilidade Genômica , Neoplasias , Instabilidade Cromossômica/genética , Dano ao DNA , Reparo do DNA/genética , Humanos , Neoplasias/tratamento farmacológico , Neoplasias/genética
13.
Life Sci ; 269: 119083, 2021 Mar 15.
Artigo em Inglês | MEDLINE | ID: mdl-33482191

RESUMO

Rheumatoid arthritis (RA) is an autoimmune disease that generally affects the joints. In the late stages of the disease, it can be associated with several complications. Although the exact etiology of RA is unknown, various studies have been performed to understand better the immunological mechanisms involved in the pathogenesis of RA. At the onset of the disease, various immune cells migrate to the joints and increase the recruitment of immune cells to the joints by several immunological mediators such as cytokines and chemokines. The function of specific immune cells in RA is well-established. The shift of immune responses to Th1 or Th17 is one of the most essential factors in the development of RA. Myeloid-derived suppressor cells (MDSCs), as a heterogeneous population of myeloid cells, play a regulatory role in the immune system that inhibits T cell activity through several mechanisms. Various studies have been performed on the function of these cells in RA, which in some cases have yielded conflicting results. Therefore, the purpose of this review article is to comprehensively understand the pro-inflammatory and anti-inflammatory functions of MDSCs in the pathogenesis of RA.


Assuntos
Artrite Reumatoide/imunologia , Artrite Reumatoide/patologia , Células Supressoras Mieloides/imunologia , Células Th1/imunologia , Células Th17/imunologia , Animais , Artrite Reumatoide/metabolismo , Citocinas/metabolismo , Humanos
14.
Int J Neurosci ; 131(4): 370-389, 2021 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-32241218

RESUMO

Background and purpose: Duchenne muscular dystrophy (DMD), a lethal X-linked recessive muscle dystrophy, is resulted in by different mutations including mostly frame-shifting gross deletions and duplications and rarely point mutations in DMD gene. Increasing weakness, progressive loss of skeletal muscle mass, and later-onset cardiomyopathy are serious clinical symptoms which ultimately lead to cardiac and respiratory failure, and premature death in DMD patients by age of 30. DMD is a prevalent genetic disorder and considers as an interesting target for gene therapy approaches. Massive gene size and existence of enormous number of muscle tissues are terrific hindrance against DMD treatments, nevertheless enormous efforts have been executed in the fields of gene replacement therapy, gene editing strategies, cell-based treatments, and small drug medications. Hot spot exons skipping and suppression of premature stop codons are the most interesting treatments for restoring functional DMD product, dystrophin protein. Clustered regularly interspaced short palindromic repeats (CRISPR)-CRISPR-associated protein (Cas) systems are the most interesting genome editing platforms that are able to restore open reading frame of DMD gene. CRISPR-Cas9 and CRISPR-Cpf1 are two main genome editing sub-types that successfully used in mdx mice.Conclusions: This review aims to present recent progresses and future prospects over three main DMD therapeutic subgroups including gene therapy, cell therapy, and pharmacological therapy.


Assuntos
Distrofia Muscular de Duchenne/terapia , Animais , Terapia Baseada em Transplante de Células e Tecidos , Modelos Animais de Doenças , Terapia Genética , Humanos , Músculo Esquelético/fisiopatologia , Distrofia Muscular de Duchenne/fisiopatologia
15.
Bioprocess Biosyst Eng ; 44(3): 517-523, 2021 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-33136201

RESUMO

In this study, CeO2 (cerium oxide) nanoparticles were synthesized using Pinus halepensis pollen and were characterized by field emission scanning electron microscopy (FESEM), powder X-ray diffraction (PXRD) and Raman spectroscopy. The results showed that the ensuing CeO2 nanostructures, ranging in size from 5 to 25 nm, had high porosity. Synthesized CeO2 showed the effective catalytic activity towards the photocatalytic removal of dyes. In this work, the photocatalytic activity to removal dye (methyl violet 2B), in the absence of UV radiation, using cerium dioxide nanoparticles (CeO2-NP) was determined. In this research, four main factors such as effect on color, concentration and pH were examined and maximum %R was obtained about was 97% in 75 min in presence of 50 mg of hydrogen peroxide.


Assuntos
Cério/química , Corantes/química , Nanoestruturas/química , Corantes/isolamento & purificação , Pinus , Porosidade
16.
J Exp Pharmacol ; 12: 517-527, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-33235522

RESUMO

PURPOSE: Hepatic encephalopathy (HE) is described as impaired brain function induced by liver failure. Ammonia is the most suspected chemical involved in brain injury during HE. Although the precise mechanism of HE is not clear, several studies mentioned the role of oxidative stress in ammonia neurotoxicity. In animal models, the use of some compounds with antioxidant properties was reported to reduce the neurotoxic effects of ammonia, improve energy metabolism, and ameliorate the HE symptoms. Citicoline is a principal intermediate in the biosynthesis pathway of phosphatidylcholine that acts as neurovascular protection and repair effects. Various studies mentioned the neuroprotective and antioxidative effects of citicoline in the central nervous system. This study aims to investigate the potential protective effects of citicoline therapeutic in an animal model of HE. MATERIALS AND METHODS: Mice received acetaminophen (APAP,1g/kg, i. p.) and then treated with citicoline (500 mg/kg, i.p) one and two hours after APAP. Animals were monitored for locomotor activity and blood and brain ammonia levels. Moreover, markers of oxidative stress were assessed in the brain tissue. RESULTS: The result of the study revealed that plasma and brain ammonia and the liver injury markers increased, and locomotor activity impaired in the APAP-treated animals. Besides, an increase in markers of oxidative stress was evident in the brain of the APAP-treated mice. It was found that citicoline supplementation enhanced the animal's locomotor activity and improved brain tissue markers of oxidative stress. CONCLUSION: These data propose citicoline as a potential protective agent in HE. The effects of citicoline on oxidative stress markers could play a fundamental role in its neuroprotective properties during HE.

17.
Rev Physiol Biochem Pharmacol ; 178: 83-110, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32789786

RESUMO

Elevated levels of plasma cholesterol, impaired vascular wall, and presence of inflammatory macrophages are important atherogenic risk factors contributing to atherosclerotic plaque formation and progression. The interventions modulating these risk factors have been found to protect against atherosclerosis development and to decrease atherosclerosis-related cardiovascular disorders. Nutritional approaches involving supplements followed by improving dietary habits and lifestyle have become growingly attractive and acceptable methods used to control atherosclerosis risk factors, mainly high levels of plasma cholesterol. There are a large number of studies that show berberine, a plant bioactive compound, could ameliorate atherosclerosis-related risk factors. In the present literature review, we put together this studies and provide integrated evidence that exhibits berberine has the potential atheroprotective effect through reducing increased levels of plasma cholesterol, particularly low-density lipoprotein (LDL) cholesterol (LDL-C) via LDL receptor (LDLR)-dependent and LDL receptor-independent mechanisms, inhibiting migration and inflammatory activity of macrophages, improving the functionality of endothelial cells via anti-oxidant activities, and suppressing proliferation of vascular smooth muscle cells. In conclusion, berberine can exert inhibitory effects on the atherosclerotic plaque development mainly through LDL-lowering activity and suppressing atherogenic functions of mentioned cells. As the second achievement of this review, among the signaling pathways through which berberine regulates intracellular processes, AMP-activated protein kinase (AMPK) has a central and critical role, showing that enhancing activity of AMPK pathway can be considered as a promising therapeutic approach for atherosclerosis treatment.


Assuntos
Aterosclerose , Berberina , Células Endoteliais/efeitos dos fármacos , Aterosclerose/tratamento farmacológico , Aterosclerose/prevenção & controle , Berberina/farmacologia , Berberina/uso terapêutico , LDL-Colesterol , Humanos , Receptores de LDL
18.
RSC Adv ; 10(50): 29737-29744, 2020 Aug 10.
Artigo em Inglês | MEDLINE | ID: mdl-35518215

RESUMO

The green synthesis of nanoparticles (NPs) is important because of the favorable potential of plant biomolecules involved in the synthesis of NPs. This study aimed to provide a fast, easy, cheap, and environmentally friendly method for the synthesis of superparamagnetic iron oxide NPs (SPIONP) and silver nanoparticles (AgNPs) using Stachys lavandulifolia and an evaluation of their use as antifungal agents against Aspergillus niger and Fusarium solani. The physicochemical properties of AgNPs and SPIONPs were studied using FESEM, HRTEM, XRD, VSM, UV-Vis, and EDX spectroscopy. The sizes and morphologies of the AgNPs and SPIONPs, measured via electron microscopy, were 12.57 nm and 10.70 nm, respectively. Nanoparticles have previously been shown to have antifungal activities, and SPIONPs and AgNPs can show antifungal resistance. These NPs can be used as a substitute for widely used toxic fungicides to promote food safety and public health.

19.
Biofactors ; 46(3): 341-355, 2020 May.
Artigo em Inglês | MEDLINE | ID: mdl-31875344

RESUMO

Atherosclerosis is a complex and long-lasting disorder characterized by chronic inflammation of arteries that leads to the initiation and progression of lipid-rich plaques, in which monocytes/macrophages play the central role in endothelial inflammation and taking up these lipids. Circulating monocytes can adopt a long-term proinflammatory phenotype leading to their atherogenic activities. During atherogenic condition, inflammatory monocytes adhere to the surface of the activated endothelial cells and then transmigrate across the endothelial monolayer into the intima, where they proliferate and differentiate into macrophages and take up the lipoproteins, forming foam cells that derive atherosclerosis progression. Therefore, modulating the atherogenic activities of inflammatory monocytes can provide a valuable therapeutic approach for atherosclerosis prevention and treatment. Curcumin is a naturally occurring polyphenolic compound with numerous pharmacological activities and shows protective effects against atherosclerosis; however, underlying mechanisms are not clearly known yet. In the present review, on the basis of a growing body of evidence, we show that curcumin can exert antiatherosclerotic effect through inhibiting the atherogenic properties of monocytes, including inflammatory cytokine production, adhesion, and transendothelial migration, as well as intracellular cholesterol accumulation.


Assuntos
Anti-Inflamatórios não Esteroides/farmacologia , Aterosclerose/tratamento farmacológico , Curcumina/farmacologia , Inflamação/tratamento farmacológico , Monócitos/efeitos dos fármacos , Animais , Aterosclerose/complicações , Modelos Animais de Doenças , Humanos , Técnicas In Vitro , Inflamação/complicações , Ratos
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA