Increased expression of miR-320b in blood plasma of patients in response to SARS-CoV-2 infection.

Coronavirus disease 2019 (COVID-19) is caused by Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2). Recent research has demonstrated how epigenetic mechanisms regulate the host-virus interactions in COVID-19. It has also shown that microRNAs (miRNAs) are one of the three fundamental mechanisms of the epigenetic regulation of gene expression and play an important role in viral infections. A pilot study published by our research group identified, through next-generation sequencing (NGS), that miR-4433b-5p, miR-320b, and miR-16-2-3p are differentially expressed between patients with COVID-19 and controls. Thus, the objectives of this study were to validate the expression of these miRNAs using quantitative real-time polymerase chain reaction (qRT-PCR) and to perform in silico analyses. Patients with COVID-19 (n = 90) and healthy volunteers (n = 40) were recruited. MiRNAs were extracted from plasma samples and validated using qRT-PCR. In addition, in silico analyses were performed using mirPath v.3 software. MiR-320b was the only miRNA upregulated in the case group com-pared to the control group. The in silico analyses indicated the role of miR-320b in the regulation of the KITLG gene and consequently in the inflammatory process. This study confirmed that miR-320b can distinguish patients with COVID-19 from control participants; however, further research is needed to determine whether this miRNA can be used as a target or a biomarker.

Single-nucleotide polymorphisms related to vitamin D metabolism and severity or mortality of COVID-19: A systematic review and meta-analysis.

This systematic review and meta-analysis aimed to verify the association between single-nucleotide polymorphisms (SNPs) in vitamin D-related genes and the severity or mortality of coronavirus disease 19 (COVID-19). We systematically searched PubMed, BVS/Bireme, Scopus, Embase, and Web of Science for relevant studies published until November 24, 2023. Twelve studies were included. Thirty-one SNPs related to four genes were studied (VDR, 13 SNPs; GC, 6 SNPs; DHCR7/NADSYN1, 6 SNPs; CYP2R1, 6 SNPs). Eight SNPs were examined in two or more studies (VDR rs731236, rs2228570, rs1544410, rs7975232, rs739837, rs757343, rs11568820, and rs4516035). Meta-analysis showed a significant association between the VDR rs1544410 Bb + bb genotype and b allele and an increased odds of developing severe/critical COVID-19 (Bb + bb vs. BB = 2 studies, OR = 1.73, 95% confidence interval (CI): 1.16-2.57, P = 0.007, I2 = 0%; b allele vs. B allele = 2 studies, OR = 1.31, 95% CI: 1.03-1.67; P = 0.03; I2 = 0%). Regarding the mortality rate, VDR rs731236 TT-genotype, TT + Tt genotype, and T allele; VDR rs1544410 bb-genotype, Bb + bb genotype, and b allele; VDR rs7975232 AA-genotype, AA + Aa genotype, and A allele; and VDR rs2228570 ff-genotype, Ff + ff genotype, and f allele were associated with increased odds of death due to COVID-19. In conclusion, the present study suggests that SNPs rs1544410 may serve as a predictive biomarker for COVID-19 severity and rs731236, rs1544410, rs7975232, and rs2228570 as predictive biomarkers for COVID-19 mortality. More well-designed studies involving a larger number of COVID-19 patients are required to validate and replicate these findings.

Outcomes in hepatocellular carcinoma patients undergoing sorafenib treatment: toxicities, cellular oxidative stress, treatment adherence, and quality of life.

The study of toxicities induced by sorafenib, as well as the identification of possible mechanisms and biomarkers of these toxicities, is important to improve the treatment and quality of life of hepatocellular carcinoma (HCC) patients. This study focused on toxicities, cellular oxidative stress, adherence, and quality of life of 11 patients with HCC treated with sorafenib. Dermatotoxicity, myelotoxicity, gastro toxicity, nephrotoxicity, pain, and fatigue were investigated. For oxidative stress analysis, the peripheral blood mononuclear cells were isolated and mitochondrial superoxide anion production was measured using MitoSOX Red test. Medication adherence was evaluated based on Morisky-Green and MedTake tests. Quality of life assessment was performed using EORTC QLQ C-30 and QLQ HCC18 questionnaires. The results showed that hand-foot syndrome (45.5%), thrombocytopenia (45.5%), diarrhea (54.5%), pain (54.5%), and fatigue (36.4%) were the most prevalent toxicities. A non-statistically significant change in the levels of superoxide anion was observed after the sorafenib treatment (Wilcoxon test, P = 0.4131). Moreover, 81.8% of patients had high adherence, 100% knew the correct indication of sorafenib, 81.8% knew the correct intake and drug regimen, and 36.4% knew the correct dose of antineoplastic. There was a significant worsening in the emotional and pain domains of quality of life after the sorafenib (Wilcoxon test, P = 0.0313 and P = 0.0313, respectively). A production of superoxide anion was not correlated with toxicities (Spearman's correlation and Mann-Whitney U tests, P > 0.05). This study suggests that oxidative stress might not be the mechanism of sorafenib toxicities.