大鼠脊髓损伤后MicroRNAs表达谱变化

目的:探究大鼠脊髓损伤后microRNAs表达谱变化。方法:将10只成年SD大鼠随机分为假手术组、模型组,建立脊髓损伤模型。术后采用Basso-Beattie-Bresnahan(BBB)量表进行运动功能评分,苏木精-伊红(HE)染色脊髓组织,通过Illumina高通量测序技术,对前期构建的cDNA文库进行RNA-Seq分析。将测序数据与高粱参考基因组对比后,以P<0.05为条件筛选出差异表达基因,通过GO、KEGG等数据库,对DEGs的功能以及参与的调控路径进行分析,并通过RT-qPCR验证RNA-Seq结果的可靠性。结果:假手术组与模型组BBB评分有显著性差异,HE染色观察到脊髓组织结构受损较为严重,脊髓损伤前后microRNAs表达有显著差异。结论:脊髓损伤许多基因表达失调。

靶向严重急性呼吸系统综合症冠状病毒2的人工microRNAs设计与思考

动植物人工miRNAs(artificial miRNAs,amiRNAs)在抗病毒感染中发挥重要作用。然而,有关amiRNAs靶向抑制重症急性呼吸综合征冠状病毒2(severe acute respiratory syndrome coronavirus 2,SARS-CoV-2)的相关研究未见报道。目的:本研究旨在设计靶向SARS-CoV-2的amiRNAs,进一步分析amiRNAs对不同变异株的匹配程度。方法:利用Invitrogen Block-iT RNAi Designer成功设计靶向SARS-CoV-2的amiRNAs。结果:分别命名为amiR-Cov23utr-1、2、3、4;其中amiR-Cov23utr-1、3和4在Omicron BA.5/2022中靶向区域序列十分保守;amiR-Cov23utr-2在Omicron BA.5/2022中的靶点缺失。结论:本研初步设计和分析了靶向SARS-CoV-2的amiRNAs,为后续深入研究amiRNAs抗SARS-CoV-2感染提供了重要基础资料。

MicroRNAs as potential biomarkers for diagnosis of schizophrenia and influence of antipsychotic treatment

Chara cterized by positive symptoms(such as changes in behavior or thoughts,including delusions and hallu cinations),negative symptoms(such as apathy,anhedonia,and social withdrawal),and cognitive impairments,schizophrenia is a chro nic,severe,and disabling mental disorder with late adolescence or early adulthood onset,Antipsychotics are the most commonly used drugs to treat schizophrenia,but those currently in use do not fully reverse all three types of symptoms characte rizing this condition.Schizophrenia is frequently misdiagnosed,resulting in a delay of or inappropriate treatment.Abnormal expression of microRNAs is connected to brain development and disease and could provide novel biomarkers for the diagnosis and prognosis of schizophrenia.The recent studies reviewed included microRNA profiling in blood-and urine-based materials and nervous tissue mate rials.From the studies that had validated the preliminary findings,potential candidate biomarkers for schizophrenia in adults could be miR-22-3p,-30e-5p,-92a-3p,-148b-5p,-181a-3p,-181a-5p,-181b-5p,-199 b-5p,-137 in whole blood,and miR-130b,-193a-3p in blood plasma.Antipsychotic treatment of schizophrenia patients was found to modulate the expression of certain microRNAs including miR-130b,-193a-3p,-132,-195,-30e,-432 in blood plasma.Further studies are warranted with adolescents and young adults having schizophrenia and consideration should be given to using animal models of the disorder to investigate the effect of suppressing or overexpressing specific microRNAs.

Potential clinical application of microRNAs in bladder cancer

Bladder cancer(BC)is the tenth most prevalent malignancy globally,presenting significant clinical and societal challenges because of its high incidence,rapid progression,and frequent recurrence.Presently,cystoscopy and urine cytology serve as the established diagnostic methods for BC.However,their efficacy is limited by their invasive nature and low sensitivity.Therefore,the development of highly specific biomarkers and effective noninvasive detection strategies is imperative for achieving a precise and timely diagnosis of BC,as well as for facilitating an optimal tumor treatment and an improved prognosis.microRNAs(miRNAs),short noncoding RNA molecules spanning around 20–25 nucleotides,are implicated in the regulation of diverse carcinogenic pathways.Substantially altered miRNAs form robust functional regulatory networks that exert a notable influence on the tumorigenesis and progression of BC.Investigations into aberrant miRNAs derived from blood,urine,or extracellular vesicles indicate their potential roles as diagnostic biomarkers and prognostic indicators in BC,enabling miRNAs to monitor the progression and predict the recurrence of the disease.Simultaneously,the investigation centered on miRNA as a potential therapeutic agent presents a novel approach for the treatment of BC.This review comprehensively analyzes biological roles of miRNAs in tumorigenesis and progression,and systematically summarizes their potential as diagnostic and prognostic biomarkers,as well as therapeutic targets for BC.Additionally,we evaluate the progress made in laboratory techniques within this field and discuss the prospects.

microRNAs在骨质疏松症发生发展中的研究进展

骨质疏松的发生是由于成骨细胞介导的骨形成和破骨细胞介导的骨吸收平衡被打破,而使骨稳态出现异常。骨稳态调节因子microRNAs作为表观调控因子,通过调控成骨细胞和破骨细胞的相关信号分子的表达,使其在骨代谢中发挥重要作用。本文就microRNAs在骨质疏松症中参与调节维持骨微环境的细胞分化、增殖、自噬和在相关信号分子、相关信号通路的表达等方面最新研究进展进行综述,并总结了microRNAs在骨细胞分化中的作用,突出了microRNAs在代谢性骨疾病中作为治疗靶点的潜力。

Acquired sensorineural hearing loss,oxidative stress,and microRNAs

Hearing loss is the third leading cause of human disability.Age-related hearing loss,one type of acquired sensorineural hearing loss,is largely responsible for this escalating global health burden.Noise-induced,ototoxic,and idiopathic sudden sensorineural are other less common types of acquired hearing loss.The etiology of these conditions is complex and multi-fa ctorial involving an interplay of genetic and environmental factors.Oxidative stress has recently been proposed as a likely linking cause in most types of acquired sensorineural hearing loss.Short non-coding RNA sequences known as microRNAs(miRNAs)have increasingly been shown to play a role in cellular hypoxia and oxidative stress responses including promoting an apoptotic response.Sensory hair cell death is a central histopathological finding in sensorineural hearing loss.As these cells do not regenerate in humans,it underlies the irreversibility of human age-related hearing loss.Ovid EMBASE,Ovid MEDLINE,Web of Science Core Collection,and ClinicalTrials.gov databases over the period August 1,2018 to July 31,2023 were searched with"hearing loss,""hypoxamiRs,""hypoxia,""microRNAs,""ischemia,"and"oxidative stress"text words for English language primary study publications or registered clinical trials.Registe red clinical trials known to the senior author we re also assessed.A total of 222studies were thus identified.After excluding duplicates,editorials,retra ctions,secondary research studies,and non-English language articles,39 primary studies and clinical trials underwent full-text screening.This resulted in 11 animal,in vitro,and/or human subject journal articles and 8 registered clinical trial database entries which form the basis of this narrative review.MiRNAs miR-34a and miR-29b levels increase with age in mice.These miRNAs were demonstrated in human neuroblastoma and murine cochlear cell lines to target Sirtuin 1/peroxisome proliferato r-activated receptor gamma coactivator-1-alpha(SIRT1/P GC-1α),SIRT1p53,and SIRT1/hypoxia-inducible factor 1-alpha signaling pathways resulting in increased apoptosis.Furthermore,hypoxia and oxidative stress had a similar adve rse apoptotic effect,which was inhibited by resve ratrol and a myocardial inhibitorassociated transcript,a miR-29b competing endogenous mRNA.Gentamicin reduced miR-182-5p levels and increased cochlear oxidative stress and cell death in mice-an effect that was corrected by inner ear stem cell-derived exosomes.There is ongoing work seeking to determine if these findings can be effectively translated to humans.

MicroRNAs in thyroid cancer with focus on medullary thyroid carcinoma:potential therapeutic targets and diagnostic/prognostic markers and web based tools

This review aimed to describe the inculpation of microRNAs(miRNAs)in thyroid cancer(TC)and its subtypes,mainly medullary thyroid carcinoma(MTC),and to outline web-based tools and databases for bioinformatics analysis of miRNAs in TC.Additionally,the capacity of miRNAs to serve as therapeutic targets and biomarkers in TC management will be discussed.This review is based on a literature search of relevant articles on the role of miRNAs in TC and its subtypes,mainly MTC.Additionally,web-based tools and databases for bioinformatics analysis of miRNAs in TC were identified and described.MiRNAs can perform as oncomiRs or antioncoges,relying on the target mRNAs they regulate.MiRNA replacement therapy using miRNA mimics or antimiRs that aim to suppress the function of certain miRNAs can be applied to correct miRNAs aberrantly expressed in diseases,particularly in cancer.MiRNAs are involved in the modulation of fundamental pathways related to cancer,resembling cell cycle checkpoints and DNA repair pathways.MiRNAs are also rather stable and can reliably be detected in different types of biological materials,rendering them favorable diagnosis and prognosis biomarkers as well.MiRNAs have emerged as promising tools for evaluating medical outcomes in TC and as possible therapeutic targets.The contribution of miRNAs in thyroid cancer,particularly MTC,is an active area of research,and the utility of web applications and databases for the biological data analysis of miRNAs in TC is becoming increasingly important.

MicroRNAs in inflammatory bowel disease:What do we know and what can we expect?

MicroRNAs(miRNAs),small non-coding RNAs composed of 18–24 nucleotides,are potent regulators of gene expression,contributing to the regulation of more than 30%of protein-coding genes.Considering that miRNAs are regulators of inflammatory pathways and the differentiation of intestinal epithelial cells,there is an interest in exploring their importance in inflammatory bowel disease(IBD).IBD is a chronic and multifactorial disease of the gastrointestinal tract;the main forms are Crohn's disease and ulcerative colitis.Several studies have investigated the dysregulated expression of miRNAs in IBD,demonstrating their important roles as regulators and potential biomarkers of this disease.This editorial presents what is known and what is expected regarding miRNAs in IBD.Although the important regulatory roles of miRNAs in IBD are clearly established,biomarkers for IBD that can be applied in clinical practice are lacking,emphasizing the importance of further studies.Discoveries regarding the influence of miRNAs on the inflammatory process and the exploration of their role in gene regulation are expected to provide a basis for the use of miRNAs not only as potent biomarkers in IBD but also as therapeutic targets for the control of inflammatory processes in personalized medicine.

MicroRNAs:A novel signature in the metastasis of esophageal squamous cell carcinoma

Esophageal squamous cell carcinoma(ESCC)is a malignant epithelial tumor,characterized by squamous cell differentiation,it is the sixth leading cause of cancer-related deaths globally.The increased mortality rate of ESCC patients is predominantly due to the advanced stage of the disease when discovered,coupled with higher risk of metastasis,which is an exceedingly malignant charac-teristic of cancer,frequently leading to a high mortality rate.Unfortunately,there is currently no specific and effective marker to predict and treat metastasis in ESCC.MicroRNAs(miRNAs)are a class of small non-coding RNA molecules,approximately 22 nucleotides in length.miRNAs are vital in modulating gene expression and serve pivotal regulatory roles in the occurrence,progression,and prognosis of cancer.Here,we have examined the literature to highlight the intimate correlations between miRNAs and ESCC metastasis,and show that ESCC metastasis is predominantly regulated or regulated by genetic and epigenetic factors.This review proposes a potential role for miRNAs as diagnostic and therapeutic biomarkers for metastasis in ESCC metastasis,with the ultimate aim of reducing the mortality rate among patients with ESCC.

Targeting therapy for hepatocellular carcinoma by delivering microRNAs as exosomal cargo

Exosomes,the smallest extracellular vesicles,have gained significant attention as key mediators in intercellular communication,influencing both physiological and pathological processes,particularly in cancer progression.A recent review article by Wang et al was published in a timely manner to stimulate future research and facilitate practical developments for targeted treatment of hepatocellular carcinoma using exosomes,with a focus on the origin from which exosomes derive.If information about the mechanisms for delivering exosomes to specific cells is incorporated,the concept of targeted therapy for hepatocellular carcinoma using exosomes could be more comprehensively understood.

Multifaceted role of microRNAs in gastric cancer stem cells: Mechanisms and potential biomarkers

MicroRNAs(miRNAs)have received much attention in the past decade as potential key epigenomic regulators of tumors and cancer stem cells(CSCs).The abnormal expression of miRNAs is responsible for different phenotypes of gastric cancer stem cells(GCSCs).Some specific miRNAs could be used as promising biomarkers and therapeutic targets for the identification of GCSCs.This review summarizes the coding process and biological functions of miRNAs and demon-strates their role and efficacy in gastric cancer(GC)metastasis,drug resistance,and apoptosis,especially in the regulatory mechanism of GCSCs.It shows that the overexpression of onco-miRNAs and silencing of tumor-suppressor miRNAs can play a role in promoting or inhibiting tumor metastasis,apart from the initial formation of GC.It also discusses the epigenetic regulation and potential clinical applications of miRNAs as well as the role of CSCs in the pathogenesis of GC.We believe that this review may help in designing novel therapeutic approaches for GC.

Dysregulated microRNAs in type 2 diabetes and breast cancer:Potential associated molecular mechanisms

Type 2 diabetes(T2D)is a multifaceted and heterogeneous syndrome associated with complications such as hypertension,coronary artery disease,and notably,breast cancer(BC).The connection between T2D and BC is established through processes that involve insulin resistance,inflammation and other factors.Despite this comprehension the specific cellular and molecular mechanisms linking T2D to BC,especially through microRNAs(miRNAs),remain elusive.miRNAs are regulators of gene expression at the post-transcriptional level and have the function of regulating target genes by modulating various signaling pathways and biological processes.However,the signaling pathways and biological processes regulated by miRNAs that are associated with T2D and BC have not yet been elucidated.This review aims to identify dysregulated miRNAs in both T2D and BC,exploring potential signaling pathways and biological processes that collectively contribute to the development of BC.

Emerging roles of microRNAs as diagnostics and potential therapeutic interest in type 2 diabetes mellitus

BACKGROUND Type 2 diabetes mellitus(T2DM)is a metabolic disease of impaired glucose utilization.Uncontrolled high sugar levels lead to advanced glycation end products(AGEs),which affects several metabolic pathways by its receptor of advanced glycation end products(RAGE)and causes diabetic complication.MiRNAs are small RNA molecules which regulate genes linked to diabetes and affect AGEs pathogenesis,and target tissues,influencing health and disease processes.AIM To explore miRNA roles in T2DM's metabolic pathways for potential therapeutic and diagnostic advancements in diabetes complications.METHODS We systematically searched the electronic database PubMed using keywords.We included free,full-length research articles that evaluate the role of miRNAs in T2DM and its complications,focusing on genetic and molecular disease mechanisms.After assessing the full-length papers of the shortlisted articles,we included 12 research articles.RESULTS Several types of miRNAs are linked in metabolic pathways which are affected by AGE/RAGE axis in T2DM and its complications.miR-96-5p,miR-7-5p,miR-132,has_circ_0071106,miR-143,miR-21,miR-145-5p,and more are associated with various aspects of T2DM,including disease risk,diagnostic markers,complications,and gene regulation.CONCLUSION Targeting the AGE/RAGE axis,with a focus on miRNA regulation,holds promise for managing T2DM and its complications.MiRNAs have therapeutic potential as they can influence the metabolic pathways affected by AGEs and RAGE,potentially reducing inflammation,oxidative stress,and vascular complications.Additionally,miRNAs may serve as early diagnostic biomarkers for T2DM.Further research in this area may lead to innovative therapeutic strategies for diabetes and its associated complications.

血清microRNAs预测ST段抬高型心肌梗死患者预后不良的Meta分析

目的:利用Meta分析的方法系统评价血清microRNAs对ST段抬高型心肌梗死(ST-segmentelevationmyocardial infarction,STEMI)患者不良预后的预测价值。方法:计算机检索PubMed、Webof Science、EMbase、the Cochrane Library、中国知网、万方数据、维普数据库和中国生物医学文献数据库,纳入microRNAs预测STEMI预后情况的相关研究,检索时限设定为建库至2023年10月31日。根据诊断性试验研究质量评估量表(quality assessment of diagnostic accuracy studies-2,QUADAS-2)评价文献质量,采用Stata 17.0、RevMan 5.4和Meta-Disc 1.4软件进行Meta分析。结果:本研究共纳入14篇国内外研究,涉及STEMI患者1 816例,包括预后不良患者593例。随机效应模型合并结果显示,血清microRNAs预测STEMI患者不良预后的合并敏感度为0.78(95%CI:0.75~0.82),合并特异度为0.77(95%CI:0.75~0.79),综合受试者工作特征曲线下面积为0.85(95%CI:0.83~0.88)。亚组分析表明不同预后事件、患者是否为急性STEMI、不同样本量可能是造成异质性的原因。Deek's对称性检验表明不存在潜在的发表偏倚(t=1.10,P=0.29)。Fagan's列线图显示,应用血清microRNAs后,STEMI患者不良预后事件被正确预测的概率由50%上升至78%,预后良好患者被误判的概率由50%下降至21%。结论:本研究通过Meta分析的方法,共纳入14篇文献,发现血清microRNAs对STEMI患者不良预后具有一定预测价值,在STEMI患者预后管理中具有较好的应用前景。

microRNAs在儿童呼吸道合胞病毒感染中调控作用的研究进展

呼吸道合胞病毒(RSV)是儿童急性下呼吸道感染最常见的病原体,对儿童的健康构成严重威胁,但其病理机制仍不明确,目前仍然没有有效预防和治疗呼吸道合胞病毒的方法。RSV是具有包膜单负链RNA病毒,编码11种蛋白质,这些蛋白质是诱导气道高反应性(AHR)的关键因素。微小RNA(miRNAs)近来被认为是基因表达调控因子,通过调节炎症反应和免疫细胞功能以及气道上皮细胞的宿主免疫反应,在病毒感染中发挥调控作用。本文综述了miRNAs在RSV感染中调控作用的研究进展,旨在为RSV的致病机制、诊断及治疗提供新思路。

microRNAs在呼吸道合胞病毒感染中作用的研究进展

呼吸道合胞病毒是儿童急性下呼吸道感染最常见的病原体,严重威胁儿童健康,其致病机制较为复杂,目前仍然没有有效预防和治疗呼吸道合胞病毒的方法。近年来,miRNA在调节基因表达和蛋白质功能中的作用受到了广泛关注,很多的证据表明miRNA在呼吸道合胞病毒感染的调控中发挥着重要作用。本文综述了miRNA在呼吸道合胞病毒感染中调控作用的研究进展,旨在为呼吸道合胞病毒的致病机制研究、诊断及治疗提供新思路。

Current Research Status of MicroRNAs in Squamous Cell Carcinoma of the Tongue

Tongue squamous cell carcinoma (TSCC) is the most invasive type of oral malignant tumor, posing a serious threat to human life and health. Its pathogenesis is complex and has a high degree of malignancy. Recurrence and metastasis often lead to poor prognosis. MicroRNAs are a type of single stranded small molecule RNA with only 18 - 25 nucleotides, which can regulate the expression of various genes and participate in the occurrence and development of tumors. Studies have found that microRNA expression profiling can serve as a reliable and stable biological indicator for early diagnosis and prognosis of tumors. This article provides a review of the research status of MicroRNAs in squamous cell carcinoma of the tongue.

MicroRNAs在脑缺血后大脑神经保护中的作用

脑卒中是世界范围内导致身体残疾和死亡的主要原因之一,其中缺血性脑卒中占卒中的80%以上。一旦发生脑卒中,90%的幸存者遗有轻到重度的永久性神经功能障碍,给家庭和社会带来沉重的经济和精神负担。因此,有效促进缺血性脑卒中后各种神经功能的恢复成为临床医学和基础医学研究的重点和热点。

Exosomal microRNAs in hepatocellular carcinoma,expanding research field

In this editorial we comment on the review by Wang et al published in the recent issue of the World Journal of Gastroenterology in 2023.Small extracellular vesicles(exosomes)play important roles in the tumor microenvironment.In this review,the authors introduce the following points:(1)The composition and function of exosomal microRNAs(miRNAs)of different cell origins in hepatocellular carcinoma(HCC);(2)the crosstalk between exosomal miRNAs from stromal cells and immune cells in the tumor microenvironment and the progression of HCC;and(3)the potential applicability of exosomal miRNAs derived from mesenchymal stem cells in the treatment of HCC.In addition,the potential applicability of exosomal miRNAs derived from mesenchymal stem cells in the treatment of HCC was introduced.In this review,the authors give us an overview of the exosomal RNA and summarize the function of exosomal RNA in HCC,which provides a deeper understanding of exosomal miRNAs to the readers.

MicroRNAs in hepatocellular carcinoma treatment:Charting the path forward

MicroRNAs(miRNAs)are recognized for their involvement in the regulation of gene expression and exhibit significant potential in both the prognostic assessment and treatment of hepatocellular carcinoma(HCC).HCC,like other tumors,seldom occurs in isolation;instead,it evolves within a microenvironment featuring oncogenic and tumor-suppressive elements.When combined with suitable delivery vehicles,miRNA technology provides the capability to directly engage with these elements,thereby hindering tumor formation and progression.Ongoing research in this domain holds the promise of enabling a more efficacious and multi-modal treatment approach for HCC in the near future.