RNA m6A dynamic modification mediated by nucleuslocalized FTO is involved in follicular reserve

In eukaryotic organisms,the most common internal modification of messenger RNA(m RNA)is N6-methyladenosine(m6A).This modification can be dynamically and reversibly controlled by specific enzymes known as m6A writers and erasers.The fat-mass and obesity-associated protein(FTO)catalyzes RNA demethylation and plays a critical role in various physiological and pathological processes.Our research identified dynamic alterations in both m6A and FTO during the assembly of primordial follicles,with an inverse relationship observed for m6A levels and nuclear-localized FTO expression.Application of Fto small interfering RNA(si RNA)altered the expression of genes related to cell proliferation,hormone regulation,and cell chemotaxis,and affected RNA alternative splicing.Overexpression of the full-length Fto gene led to changes in m6A levels,alternative splicing of Cdk5,cell proliferation,cell cycle progression,and proportion of primordial follicles.Conversely,overexpression of Fto lacking a nuclear localization signal(NLS)did not significantly alter m6A levels or primordial follicle assembly.These findings suggest that FTO,localized in the nucleus but not in the cytoplasm,regulates RNA m6A demethylation and plays a role in cell proliferation,cell cycle progression,and primordial follicle assembly.These results highlight the potential of m6A and its eraser FTO as possible biomarkers and therapeutic targets.

Gut microbiota and diabetic kidney diseases: Pathogenesis and therapeutic perspectives

Diabetic kidney disease(DKD)is one of the major chronic complications of diabetes mellitus(DM),as well as a main cause of end-stage renal disease.Over the last few years,substantial research studies have revealed a contributory role of gut microbiota in the process of DM and DKD.Metabolites of gut microbiota like lipopolysaccharide,short-chain fatty acids,and trimethylamine N-oxide are key mediators of microbial–host crosstalk.However,the underlying mechanisms of how gut microbiota influences the onset and progression of DKD are relatively unknown.Besides,strategies to remodel the composition of gut microbiota or to reduce the metabolites of microbiota have been found recently,representing a new potential remedial target for DKD.In this minireview,we will address the possible contribution of the gut microbiota in the pathogenesis of DKD and its role as a therapeutic target.

Near-infrared carbon nanodots for effective identification and inactivation of Gram-positive bacteria

An unacceptable increase in antibacterial resistance has arisen due to the abuse of multiple classes of broad-spectrum antibiotics.Therefore,it is significant to develop new antibacterial agents,especially those that can accurately identify and kill specific bacteria.Herein,we demonstrate a kind of perilla-derived carbon nanodots(CNDs),integrating intrinsic advantages of luminescence and photodynamic,providing the opportunity to accurately identify and kill specific bacteria.The CNDs have an exotic-doped andπ-conjugated core,vitalizing them near-infrared(NIR)absorption and emission properties with photoluminescence quantum yield of 21.1%;hydrophobic chains onto the surface of the CNDs make them to selectively stain Gram-positive bacteria by insertion into their membranes.Due to the strong absorption in NIR region,reactive oxygen species are in situ generated by the CNDs onto bacterial membranes under 660 nm irradiation,and 99.99%inactivation efficiency against Gram-positive bacteria within 5 min can be achieved.In vivo results demonstrate that the CNDs with photodynamic antibacterial property can eliminate the inflammation of the area affected by methicillin-resistant Staphylococcus aureus(MRSA),and enabling the wound to be cured quickly.

Interventions for preventing influenza: An overview of Cochrane systematic reviews and a Bayesian network meta-analysis

Background:Influenza places a heavy public health burden in numerous countries every year.In addition to vaccines,there are some interventions that are effective in preventing influenza.Objective:This overview of systematic reviews(SRs)aimed to evaluate the efficacy and safety of interventions for influenza prevention.Search strategy:We searched the Cochrane Database of Systematic Reviews,2020,Issue 1 for relevant Cochrane SRs using the keywords‘‘common cold,"‘‘influenza,"and‘‘flu."Inclusion criteria:Cochrane SRs that investigated the prevention of influenza were included.Participants included the general population without influenza or influenza-like symptoms,who were treated with preventative interventions and compared to individuals receiving no treatment or placebo.Data extraction and analysis:Two reviewers independently screened citations against pre-defined inclusion criteria and extracted data.The methodological quality of these SRs was evaluated using the Assessing the Methodological Quality of Systematic Reviews-II(AMSTAR-II)guidelines.The primary outcome of our analysis was the incidence of influenza,and the secondary outcomes were the incidence of influenza-like illness and hospitalization.In addition to the narrative summary of SR findings,we also pooled data from homogeneous trials among these SRs and produced evidence mapping.We conducted a network meta-analysis to compare the effect across interventions and used the Cochrane approach to grading of recommendations,assessment,development,and evaluation(GRADE)to assess the quality of evidence.Results:Eleven Cochrane SRs were included,covering five medications,eleven vaccinations and four complementary therapies.Among these SRs,73%scored"high"quality on AMSTAR-II rating.We found that eight interventions,including amantadine,garlic,and six different vaccines,were beneficial for reducing the incidence of influenza compared to placebo,while oseltamivir,zanamivir,Ganmao capsule,Echinacea,and another three types of vaccine were probably beneficial.Ganmao capsule ranked highest for influenza prevention in the network meta-analysis,followed by amantadine,garlic,and vaccines of all types.Monovalent inactivated parenteral vaccine was found to be beneficial in reducing the incidence of influenza-like illness.None of the interventions reduced the hospitalization rate.Conclusion:High-quality evidence showed that garlic or vaccine had advantages in preventing influenza,and that vitamin C is not effective.The effect of other interventions needs to be further verified with highquality evidence.