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Azo dyes, as a major group of the synthetic colorants, are added to food products not only to make them aesthetic but also to preserve their appearance. However, the use of azo dyes in food has been banned worldwide due to side effects on human health. The search was conducted using PubMed, Scopus, Web of Science, Europe PMC beta, Science Direct, and Springer database considering all articles published up to 9 July 2021. The inclusion criteria were double-blind, randomized, cohort studies, placebo-controlled trials, case reports, non-controlled trials, and case series. Several studies suggest that azo dyes induce oxidative stress, which subsequently increases the concentration of malondialdehyde and reduces superoxide dismutase (SOD) activity and glutathione (GSH) concentration in brain tissue. Also, results showed the adverse effects of azo dyes on the brain parts such as the prefrontal cortex, cerebellum, and cerebrum which, are accompanied by changes in brain function. It can be concluded that azo dyes with an increase in oxidative stress affect the most important parts of the brain and cause brain dysfunction. This study aimed to evaluate the effects of the food additive azo dyes on brain tissues.

In late December 2019, a new kind of Coronavirus called severe acute respiratory syndrome Coronavirus 2 (SARS-CoV-2) was officially identified in Wuhan, China. In March 2020, SARS-CoV-2 was declared a pandemic by the World Health Organization (WHO), and it has infected millions of people worldwide. SARS-CoV-2 is a highly contagious Coronavirus, which has led to an outbreak of acute respiratory tract infection called "Coronavirus disease 2019" (COVID-19), resulting in mild to severe respiratory infections in humans. The design of appropriate therapeutic approaches is dependent on the understanding of molecular and cellular pathways of Coronavirus infections. In this study, we summarized the characteristic features of SARS-CoV-2. In addition, we considered the recent information regarding COVID-19 molecular immune pathogenesis, diagnosis, and potential treatment, which may provide novel perspectives and therapeutic goals in combating SARS-CoV-2.

MicroRNAs (miRNAs) are short non-coding RNAs that bind to the 3' untranslated region (3'' UTR) of target mRNAs to control gene expression post-transcriptionally. Recent indications have highlighted their important roles in a variety of pathophysiological conditions as well as human malignancies. Dysregulated miRNAs act as tumor suppressor genes or oncogenes in a variety of cancers. MiR-491 has been shown to have a major effect on tumorigenesis in multiple malignancies through binding to specific genes and signaling cascades, thereby preventing cancer progression. This review provides an overview of miR-491 expression in regulatory mechanisms and biological procedures of tumor cells, as well as the prospective possible treatment effects of various types of human cancers.

Inflammatory breast cancer (IBC) as a rare and highly aggressive type of breast cancer displays phenotypic characteristics. To date, the IBC-associated molecular mechanisms are entirely unknown. In addition, there is an urgent need to identify the new biomarkers involved in the diagnosis and therapeutic purposes of IBC. MicroRNAs, a category of short noncoding RNAs, are capable of controlling the post-transcriptional expression of genes and thus can act as diagnostic predictive tools. In this review, we addressed the status of oncogenic and tumor suppressor miRNA-mediated IBC in current studies. Furthermore, based on their targets, their involvement in cancer progression, angiogenesis, metastasis, and apoptosis were determined.

In this work, the Fe Ag bimetallic nanoparticles supported on TiO2 nanowires (NWs) were synthesized by a facile chemical deposition method. This material subsequently was applied for electrochemical hydrogen storage, photocatalytic degradation of a binary solution of Auramine-O (AO) and Methylene blue (MB) dyes and photocatalytic hydrogen production. The electrochemical hydrogen storage measurements reveal that Fe Ag/TiO2 nanowires have higher hydrogen storage capacity, better cycle stability and higher rate discharge ability than the Fe Ag/TiO2 nanoparticles (NPs). Its maximum discharge capacity was 4.29 wt% and remained 3.14 wt% after 25 cycles, and the capacity retention rate was 68% at a high rate current density of 6.2 Ag-1. Moreover, the Fe Ag/TiO2 NWs supply more significant enhancement in the degradation of a binary solution of AO and MB than Fe Ag/TiO2 NPs. The photodegradation rate was 55.99% for Fe Ag/TiO2 NWs at 7 min and 29% for Fe Ag/TiO2 NPs at 52 min. Furthermore, photocatalytic hydrogen production rates on the as-prepared products are 1269 and 783 μmol h−1 for NWs and NPs, respectively. This significant electrochemical hydrogen storage and excellent photocatalytic performance can be attributed to the increased specific surface area in its one dimension (1D) structure. It was noteworthy that antibacterial activity experiments illustrated the improved antibacterial activity of Fe Ag/TiO2 NPs in comparison to Fe Ag/TiO2 NWs because the one-dimensional structure of TiO2 nanowires makes it difficult to enter the bacterial membrane.

The cytosine embedded copper based metal–organic framework (Bio-MOF) was synthesized by facile one-step sonochemical method by simply mixing of 4–4, biphenyldicarboxylic, cytosine and copper nitrate (Bio-Cu-H2bpdc-Cy). The prepared bio-MOF was characterized by XRD, FTIR and FE-SEM techniques. The effect of Cu-H2bpdc-Cy on the expression of the rsbA gene was evaluated in the clinical and standard Proteus mirabilis and study of MIC of Cu-H2bpdc-Cy by microdilution against them that have the rsbA gene. According to different concentrations of MIC, MBC concentrations was cultured on blood agar culture medium. Regarding to the concentration of MIC, gene expression changes were obtained by real-time PCR. MIC for standard and clinical strains of Proteus mirabilis was 1.6 and 1.8 mg/ml, and also MBC was obtained to be 1.8 and 2.0 mg/ml, respectively. Finally, in the real time PCR method, expression of the rsbA gene in presences of bio-Cu-H2bpdc-Cy was reduced, but has no effect on the gene expression of the Housekeeping DNA Gyrase-B gene. Considering the effect of Cu-H2bpdc-Cy on the rsbA gene in Proteus mirabilis bacteria, it is possible to use of Cu-H2bpdc-Cy agent as a therapeutic supplement against this bacterium.

During neural development, embryonic neural stem cells (eNSCs) differentiate toward glial, oligodendrocytic, and neuronal cells. Dysregulation of polyunsaturated fatty acids (PUFAs) induce a wide range of neurological and developmental disorders. In this study, we investigated the effect of various concentrations and ratios of linoleic acid (LA) and alpha linolenic acid (ALA), which belong respectively to omega-6 and omega-3 PUFAs, on the proliferation and differentiation of eNSCs.Results showed that low (25 and 50μM) or high (100 and 200μM) concentrations of ALA, but not LA, and the ratio of 1:3 of LA/ALA significantly increased neurospheres size, frequency and cell numbers, in comparison to controls. Moreover, low or high concentrations of ALA, but not LA, and different ratios of LA/ALA resulted in a significant increase in mRNA expression levels of Notch1, Hes1 and Ki-67, and the differentiation of eNSCs toward astrocytes (GFAP) and oligodendrocytes (MBP), but not neurons (β-III Tubulin), with the highest increase being for LA/ALA ratio of 1:3, in comparison to controls. These results demonstrate the importance of higher concentrations of ALA in enhancing proliferation and differentiation of eNSCs, which could be used in diet to help preventing neurodevelopmental syndromes, cognitive decline during aging, and various psychiatric disorders.

Background: The antibiotic resistance of bacteria has increased in the last decade. The mecA gene plays an important role in the pathogenicity of Methicillin-Resistant Staphylococcus aureus (MRSA) by increasing antibiotics resistance. Recent studies have indicated that nanotechnology, as an antimicrobial agent, has had promising results. Objectives: The present study was conducted to determine the effect of Cu-BPDCA-Ty on antibacterial activity and mecA gene expression in clinical and standard strains of MRSA. Methods: The phenotypic tests were used to identify MRSA strain and confirmed with molecular detection of mecA gene. Synthesized Cu-BPDCA-Ty was confirmed with different techniques such as XRD and SEM analysis. The minimum inhibitory concentration (MIC) and the minimum bactericidal concentration (MBC) were determined by the micro broth dilution method. Real time PCR was used to investigate gene expression. Pta gene was considered as an endogenous control for normalization. Data were analyzed using one sample t test and paired t test in the SPSS software Version 22. Results: The findings indicated that the MIC and the MBC of Cu-BPDCA-Ty against the standard and clinical strains of MRSA were 0.5 mg/mL, 0.8 mg/mL, 0.46 ± 0.08 mg/mL, and 0.7 ± 0.1 mg/mL, respectively. Analysis of the real- time PCR indicated that all treated groups with Cu-BPDCA- Ty showed a significant decrease in the expression of the mecA gene compared to the control group (P < 0.05). Conclusions: Cu-BPDCA-Ty had an antibacterial effect on MRSA and induced downregulation of expression of the mecA gene.

The cytosine embedded copper based metal-organic framework (Bio-MOF) was synthesized by facile one-step sonochemical method by simply mixing of 4-4, biphenyldicarboxylic, cytosine and copper nitrate (Bio-Cu-H

The guanine incropped Cu based metal-organic framework (Guanine-Cu-MOF) was synthesized by facile one-step sonochemical method by simply mixing of 4-4, biphenyldicarboxylic, guanine and copper nitrate (Bio-Cu-H2bpdc-Gu). The prepared guanine-MOF was characterized by using X-Ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), and Field emission scanning electron microscopy (FE-SEM) techniques. The morphology of prepared material was sponge-shaped which it was well documented, together with the presence of existing functional groups. The effect of prepared material on oprD Gene Expression was investigated in Clinical and Standard Strains of Pseudomonas aeruginosa (PAO-1) and minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of prepared samples against P. aeruginosa strains were determined through the broth micro-dilution method. The expression of oprD gene in strains affected by Cu-H2bpdc-Gu was quantitatively investigated through real-time PCR. MIC of Bio-Cu-H2bpdc-Gu was 400 μg/mL for the standard and clinical strains of P. aeruginosa, while, MBC of this compound was 700 μg/mL for standard strain and 800 μg/mL for clinical strains. The highest and the lowest rate of oprD gene expression were found to be 3.6 and 1.1 fold in the strains, respectively.