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Establishment of a cBSA-mediated miRNA delivery system in Camellia sinensis and functional validation of the Cs-miR163/CsSK1 module in cold stress response.

Cold stress severely limits tea (Camellia sinensis) yield and quality. MicroRNAs (miRNAs) are key post-transcriptional regulators of plant cold responses; however, in vivo functional validation in tea plants is hindered by the lack of efficient genetic transformation and nucleic acid delivery systems. In this study, a cationized bovine serum albumin (cBSA)-mediated miRNA delivery system was established in tea plants. The cold-responsive miRNA Cs-miR163 and its target gene CsSK1 (a negative regulator of cold tolerance) were used as a model. Direct cleavage of CsSK1 mRNA by Cs-miR163 was confirmed by 5' RLM-RACE and GUS transient expression assays, and enhanced cold tolerance was demonstrated in Arabidopsis overexpression lines. The cBSA preparation protocol was optimized, yielding stable cBSA/miRNA complexes with high protective capacity across temperatures of 15-35 °C and pH 4.5-7.2. Delivery parameters were systematically evaluated; optimal conditions were determined as 2 mg/mL cBSA with 10 nM miRNA and solution uptake into 3-cm cuttings for 5 days, enhancing miRNA delivery efficiency by approximately 48-fold. Transmission electron microscopy provided direct ultrastructural evidence that cBSA/miRNA nanocomplexes are internalized into tea plant cells via adsorptive-mediated endocytosis involving electrostatic membrane adsorption, membrane invagination, and cytoplasmic release. Under optimized conditions, cBSA-mediated delivery of Cs-miR163 silenced CsSK1 expression by approximately 72%, reduced relative electrolyte leakage and ROS accumulation, and markedly enhanced cold tolerance. The regulatory role of the Cs-miR163/CsSK1 module was clarified, and the established system provides a promising strategy for functional genomics in woody plants that warrants further testing in additional species and tissues.

Camellia sinensis↗

Dissection of a natural RNA silencing process in the Drosophila melanogaster germ line.

To date, few natural cases of RNA-silencing-mediated regulation have been described. Here, we analyzed repression of testis-expressed Stellate genes by the homologous Suppressors of Stellate [Su(Ste)] repeats that produce sense and antisense short RNAs. The Stellate promoter is dispensable for suppression, but local disturbance of complementarity between the Stellate transcript and the Su(Ste) repeats impairs silencing. Using in situ RNA hybridization, we found temporal control of the expression and spatial distribution of sense and antisense Stellate and Su(Ste) transcripts in germinal cells. Antisense Su(Ste) transcripts accumulate in the nuclei of early spermatocytes before the appearance of sense transcripts. The sense and antisense transcripts are colocalized in the nuclei of mature spermatocytes, placing the initial step of silencing in the nucleus and suggesting formation of double-stranded RNA. Mutations in the aubergine and spindle-E genes, members of the Argonaute and RNA helicase gene families, respectively, impair silencing by eliminating the short Su(Ste) RNA, but have no effect on microRNA production. Thus, different small RNA-containing complexes operate in the male germ line.

Animals↗

Approaches for chemically synthesized siRNA and vector-mediated RNAi.

Successful applications of RNAi in mammalian cells depend upon effective knockdown of targeted transcripts and efficient intracellular delivery of either preformed si/shRNAs or vector expressed si/shRNAs. We have previously demonstrated that 27 base pair double stranded RNAs which are substrates for Dicer can be up to 100 times more potent than 21mer siRNAs. In this mini-review we elaborate upon the rationale and design strategies for creating Dicer substrate RNAs that provide enhanced knockdown of targeted RNAs and minimize the utilization of the sense strand as RNAi effectors. Expression of shRNAs or siRNAs in mammalian cells can be achieved via transcription from either Pol II or Pol III promoters. There are certain constrictions in designing such vectors, and these are described here. Additionally, we review strategies for inducible shRNA expression and the various viral vectors that can be used to transduce shRNA genes into a variety of cells and tissues. The overall goal of this mini-review is to provide an overview of available approaches for optimizing RNAi mediated down regulation of gene expression in mammalian cells via RNA interference. Although the primary focus is the use of RNAi mediated cleavage of targeted transcripts, it is highly probable that some of the approaches described herein will be applicable to RNAi mediated inhibition of translation and transcriptional gene silencing.

Animals↗

Genomic and epigenetic regulatory mechanisms in exercise-based rehabilitation processes: Cellular and tissue remodeling, microvascular adaptation, and circulating biomarkers.

While exercise-based rehabilitation is known to positively impact functionally related parameters, the role of genomic and epigenomic responses coordinated with cellular, extracellular matrix (ECM), mitochondrial, and microvascular adaptations remains insufficiently investigated. This narrative review summarizes mechanistic evidence linking exercise-associated mechanical, metabolic, hypoxia-redox, inflammatory, and hemodynamic stimuli with tissue remodeling and clinically relevant biomarkers. Current findings indicate that integrin-focal adhesion kinase (FAK) signaling and Hippo YAP/TAZ pathways contribute to mechanical signal transduction, cytoskeletal regulation, and gene expression, whereas metabolic adaptation, ATP homeostasis, and protein synthesis are regulated through AMPK-PGC-1α, SIRT1, and mTOR-dependent pathways. Epigenetic mechanisms, including DNA methylation, histone modifications, chromatin remodeling, and noncoding RNA regulation, further influence cell-specific responses in myofibers, satellite cells, fibro-adipogenic progenitors, endothelial cells, pericytes, and immune cells. In addition, VEGF-VEGFR2, eNOS-NO, and KLF2/KLF4 signaling, together with extracellular matrix turnover and inflammation resolution, contribute to tissue repair and microvascular adaptation during rehabilitation. Importantly, acute exercise-induced molecular responses should not be interpreted as direct evidence of sustained tissue adaptation. Circulating microRNAs, extracellular vesicles, cell-free DNA, collagen-related markers, and vascular proteins represent promising approaches for monitoring rehabilitation-related changes; however, their clinical translation remains limited by challenges related to tissue specificity, biomarker kinetics, analytical variability, and the need for standardized validation alongside structural and functional outcomes.

AMPK–PGC-1α signaling↗

Transcriptome-wide N6-methyladenosine modification profiling of long non-coding RNAs in patients with recurrent implantation failure.

N6-methyladenosine (m6A) is involved in most biological processes and actively participates in the regulation of reproduction. According to recent research, long non-coding RNAs (lncRNAs) and their m6A modifications are involved in reproductive diseases. In the present study, using m6A-modified RNA immunoprecipitation sequencing (m6A-seq), we established the m6A methylation transcription profiles in patients with recurrent implantation failure (RIF) for the first time. There were 1443 significantly upregulated m6A peaks and 425 significantly downregulated m6A peaks in RIF. Gene Ontology and Kyoto Encyclopedia of Genes and Genomes pathway analyses revealed that genes associated with differentially methylated lncRNAs are involved in the p53 signalling pathway and amino acid metabolism. The competing endogenous RNA network revealed a regulatory relationship between lncRNAs, microRNAs and messenger RNAs. We verified the m6A methylation abundances of lncRNAs by using m6A-RNA immunoprecipitation (MeRIP)-real-time polymerase chain reaction. This study lays a foundation for further exploration of the potential role of m6A modification in the pathogenesis of RIF.

Humans↗

Emerging Therapies for Angelman Syndrome.

Angelman syndrome (AS) is a complex neurogenetic disorder characterized by severe global developmental delay, motor dysfunction, and epilepsy, primarily resulting from the lack of functional ubiquitin protein ligase E3A (UBE3A) protein expression in neurons. While current management remains largely symptomatic, the therapeutic landscape for AS is rapidly evolving. Emerging strategies aim to restore UBE3A function through upstream interventions, such as gene replacement therapy or unsilencing of the imprinted paternal allele, which is present but transcriptionally silenced in neurons due to genomic imprinting. This imprinting is mediated by the distal portion of a long non-coding RNA known as the UBE3A-antisense transcript (UBE3A-ATS). This UBE3A-ATS has become a key therapeutic target, with several approaches developed to unsilence the paternal allele, including antisense oligonucleotides (ASOs), CRISPR-based editing, synthetic microRNA, and other modalities. To date, three ASO programs have demonstrated promising signals in early clinical development, with reported improvements in clinical outcomes and electroencephalography (EEG) biomarkers. Given the potential for improved outcomes with early intervention, the inclusion of AS in broader genomic newborn screening programs is currently being explored. An early-intervention approach, or combination of approaches, holds significant promise for transforming the lives of individuals affected by AS with outcomes dependent on their age or genotype.

Humans↗

Short RNAs in environmental adaptation.

Non-coding small RNAs (19-24 nucleotide long) have recently been recognized as the important regulator of gene expression in both plants and animals. Several classes of endogenous short RNAs have partial or near perfect complementarity to mRNAs and a protein complex is guided by short RNAs to target mRNAs. The targeted mRNA is either cleaved or its translation is suppressed. Initially, short RNAs were believed to primarily regulate the normal development of plants and animals, but recent advances implicate short RNAs in environmental adaptation.

Acclimatization↗

RNA interference as a new biotechnological tool for the control of virus diseases in plants.

RNA silencing occurs in a wide variety of organisms, including protozoa, fungi, plants and animals and involves recognition of a target RNA and initiation of a sequence-specific RNA degradation pathway in the cytoplasm. In the last few years, there have been considerable advances in our understanding of post-transcriptional gene silencing (PTGS). This mechanism is conceived as a natural antiviral defense system in plants that is activated as a response to double-stranded RNA (dsRNA) formed during virus replication. To develop new approaches for plant protection against virus diseases based on PTGS we have expanded previous findings on RNA interference (RNAi) in animals by using dsRNA to specifically interfere with virus infection in plants. This approach differs from strategies based on transgenic expression of RNAs but still relies on PTGS as a means to achieve pathogen-derived resistance (PDR). Our findings suggest that exogenously supplied dsRNA could form the basis for the development of an environmentally safe, new biotechnological tool aimed at protecting crops against virus diseases, provided that some limitations of the current status of the approach could be overcome.

Biotechnology↗

Viral class 1 RNase III involved in suppression of RNA silencing.

Double-stranded RNA (dsRNA)-specific endonucleases belonging to RNase III classes 3 and 2 process dsRNA precursors to small interfering RNA (siRNA) or microRNA, respectively, thereby initiating and amplifying RNA silencing-based antiviral defense and gene regulation in eukaryotic cells. However, we now provide evidence that a class 1 RNase III is involved in suppression of RNA silencing. The single-stranded RNA genome of sweet potato chlorotic stunt virus (SPCSV) encodes an RNase III (RNase3) homologous to putative class 1 RNase IIIs of unknown function in rice and Arabidopsis. We show that RNase3 has dsRNA-specific endonuclease activity that enhances the RNA-silencing suppression activity of another protein (p22) encoded by SPCSV. RNase3 and p22 coexpression reduced siRNA accumulation more efficiently than p22 alone in Nicotiana benthamiana leaves expressing a strong silencing inducer (i.e., dsRNA). RNase3 did not cause intracellular silencing suppression or reduce accumulation of siRNA in the absence of p22 or enhance silencing suppression activity of a protein encoded by a heterologous virus. No other known RNA virus encodes an RNase III or uses two independent proteins cooperatively for RNA silencing suppression.

Crinivirus↗

Molecular mechanisms involved in self-renewal and pluripotency of embryonic stem cells.

Embryonic stem cells (ES cells) are derived from inner cell mass (ICM). The self-renewal and pluripotency are the main specificities of ES cells, which are likely to reveal a deeper understanding of human cellular biology and which are considered to be promising sources for cell therapy to treat patients with degenerative diseases in clinical. Growth of ES cells as a pluripotent population requires a balance between survival, proliferation, and self-renewal signals. In fact, the precise mechanism that regulates stem cell self-renewal and pluripotency remains largely unknown. Recently, in vitro and in vivo studies have identified several genetic regulators that may play important roles in the self-renewal and pluripotency process of human and mouse ES cells, including extracellular signaling factors, transcription factors, cell-cycle regulators, microRNA, genes implicated in chromosomal stability, and DNA methylation. In this review, we will summarize the currently known molecular regulators for ES cells self-renewal, and we will propose some possibilities to explain the ways in which these distinct pathways might interact.

Animals↗

Principles of micro-RNA production and maturation.

Micro-RNAs (miRNAs) are a class of approximately 22-nucleotide non-coding RNAs expressed in multicellular organisms. They are first transcribed in a similar manner to pre-mRNAs. The transcripts then go through a series of processing steps, including endonucleolytic cleavage, nuclear export and a strand selection procedure, to yield the single-stranded mature miRNA products. The transcription and processing of miRNAs determines the abundance and the sequence of mature miRNAs and has important implications for the function of miRNAs.

Animals↗

Identification of a protein encoded in the herpes simplex virus type 1 latency associated transcript promoter region.

Herpes simplex virus type 1 (HSV-1) establishes a lifelong latency in the neurons of its host. Sporadically, the latent virus reactivates and spreads back to the original site of infection and causes recrudescent diseases. The only gene actively transcribed during neuronal latency is the latency associated transcript (LAT) gene. Several transcripts have been detected in the important LAT promoter region. However, no polypeptides coded by these transcripts are known. In this communication, we reported the cloning, sequencing, and characterization of a transcript immediately upstream of LAT. We designated this gene UOL (Upstream of LAT). The UOL RNA is polyadenylated, expressed as a late gene in infected cells, transcribed in the same direction as LAT, and contains an open reading frame (ORF) capable of encoding a protein of 96 amino acids with a predicted molecular mass of 11 kDa. The UOL transcript contains 466 nucleotides in length. The 5' end of the UOL transcript starts at nucleotide 118,266 and the 3' end of the UOL transcript ends at nucleotide 118,731 based on the published 17syn+ genomic sequence. The UOL protein was detected in infected cell lysates by immunoprecipitation using an antibody raised against UOL ORF synthetic peptide. More importantly, sera from mice infected with wild-type HSV-1 but not sera from mice infected with a mutant with the UOL region deleted recognized the UOL ORF, expressed in Escherichia coli, on Western blots. These results suggest that a UOL protein is in HSV-1 infected tissue culture cells and in mice infected with HSV-1.

Amino Acid Sequence↗

An Exosomal miRNA Biomarker for the Detection of Pancreatic Ductal Adenocarcinoma.

Pancreatic ductal adenocarcinoma (PDAC) remains a difficult tumor to diagnose and treat. To date, PDAC lacks routine screening with no markers available for early detection. Exosomes are 40-150 nm-sized extracellular vesicles that contain DNA, RNA, and proteins. These exosomes are released by all cell types into circulation and thus can be harvested from patient body fluids, thereby facilitating a non-invasive method for PDAC detection. A bioinformatics analysis was conducted utilizing publicly available miRNA pancreatic cancer expression and genome databases. Through this analysis, we identified 18 miRNA with strong potential for PDAC detection. From this analysis, 10 (MIR31, MIR93, MIR133A1, MIR210, MIR330, MIR339, MIR425, MIR429, MIR1208, and MIR3620) were chosen due to high copy number variation as well as their potential to differentiate patients with chronic pancreatitis, neoplasms, and PDAC. These 10 were examined for their mature miRNA expression patterns, giving rise to 18 mature miRs for further analysis. Exosomal RNA from cell culture media was analyzed via RTqPCR and seven mature miRs exhibited statistical significance (miR-31-5p, miR-31-3p, miR-210-3p, miR-339-5p, miR-425-5p, miR-425-3p, and miR-429). These identified biomarkers can potentially be used for early detection of PDAC.

Humans↗

Tobamoviruses: Advances in Molecular Biology, Host Interactions and Integrated Disease Management.

Tobamoviruses (viruses in the genus Tobamovirus, family Virgaviridae) lead to major yield losses in economically important crops around the world. In this review, we go beyond the canonical gene expression framework by integrating recent discoveries of reverse open reading frames (rORFs) on the negative-strand RNA. These rORFs have only been experimentally validated in cucumber green mottle mosaic virus (CGMMV), with predicted sequence-conserved homologs across a subset of the genus, including TMV, ToBRFV, and PMMoV. However, they are not universally present in all tobamoviruses. We systematically dissect the infection cycle-from disassembly and replication to cell-to-cell and systemic movement-with an emphasis on the host factors hijacked at each stage. We synthesize current understanding of plant antiviral immunity, focusing on RNA silencing and NLR receptor-mediated resistance as two pillars of defense, along with the transcription factors and microRNAs that orchestrate these responses. We critically evaluate the experimental evidence for both plant defenses and viral counter-strategies, noting that many mechanistic models derive from limited model systems. We further characterize host genetic resistance and susceptibility factors applicable to crop breeding. These resources include dominant NLR and non-NLR resistance, as well as recessive resistance derived from modified host susceptibility genes. We address how viral mutations, recombination and fitness trade-offs undermine resistance durability. We then evaluate their practical deployment through conventional breeding, the exploitation of quantitative resistance, and genome editing, and outline associated agronomic drawbacks and regulatory constraints. Using ToBRFV as a case study, we analyze its epidemiological traits and assess the current arsenal of surveillance tools, from field diagnostics to remote sensing. Finally, we survey management strategies across a spectrum of maturity. Some approaches, including sanitation protocols and conventionally bred resistant cultivars, have proven effective under field conditions. The first dsRNA-based biopesticide has recently been registered in China, while other biological control agents and low-risk chemical approaches remain largely at the experimental stage. We also discuss the bottlenecks that impede lab-to-field transition and highlight promising solutions such as precision breeding and evolution-oriented cultivar deployment. By bridging molecular virology, epidemiology, and integrated disease management, this review provides a critical, bench-to-field framework for the sustainable control of tobamoviruses.

TMV↗

Regulation of AUXIN RESPONSE FACTOR3 by TAS3 ta-siRNA affects developmental timing and patterning in Arabidopsis.

MicroRNAs (miRNAs) and trans-acting siRNAs (ta-siRNAs) in plants form through distinct pathways, although they function as negative regulators of mRNA targets by similar mechanisms . Three ta-siRNA gene families (TAS1, TAS2, and TAS3) are known in Arabidopsis thaliana. Biogenesis of TAS3 ta-siRNAs, which target mRNAs encoding several AUXIN RESPONSE FACTORs (including ARF3/ETTIN and ARF4 ) involves miR390-guided processing of primary transcripts, conversion of a precursor to dsRNA through RNA-DEPENDENT RNA POLYMERASE6 (RDR6) activity, and sequential DICER-LIKE4 (DCL4)-mediated cleavage events. We show that the juvenile-to-adult phase transition is normally suppressed by TAS3 ta-siRNAs, in an ARGONAUTE7-dependent manner, through negative regulation of ARF3 mRNA. Expression of a nontargeted ARF3 mutant (ARF3mut) in a wild-type background reproduced the phase-change phenotypes detected in rdr6-15 and dcl4-2 mutants, which lose all ta-siRNAs. Expression of either ARF3 or ARF3mut in rdr6-15 plants, in which both endogenous and transgenic copies of ARF3 were derepressed, resulted in further acceleration of phase change and severe morphological and patterning defects of leaves and floral organs. In light of the functions of ARF3 and ARF4 in organ asymmetry, these data reveal multiple roles for TAS3 ta-siRNA-mediated regulation of ARF genes in developmental timing and patterning.

Arabidopsis↗

Co-expression of the Mammaglobin (SCGB2A2) Gene With hsa-miR-184 and hsa-miR-190b Indicates Its Possible Role in Oncogenic Pathways in Breast Cancer.

BACKGROUND/AIM: Breast cancer is the most common cancer in women worldwide, and early detection remains a significant challenge. Recent studies have identified increased expression of Mammaglobin A (Q13296, Gene: SCGB2A2) mRNA in breast cancer, suggesting its potential as a disease marker, although its function is not fully understood. To elucidate Mammaglobin's role, this study sought to identify co-expressed miRNAs and analyze the biological pathways they regulate. MATERIALS AND METHODS: Using TCGAbiolinks and Firebrowse, miRNA and gene expression data were collected from 86 patients, including tumor and normal tissue samples from the Cancer Genome Atlas (TCGA) Breast Cancer cohort. Transcriptomic data were analyzed with DESeq2, and a Spearman correlation was calculated for significant p-values, which were further explored using enrichment tools and target gene databases. RESULTS: DESeq2 was used to identify differential expression of miRNAs between normal and tumor breast tissues. Out of 782 miRNAs differentially expressed in breast cancer, hsa-mir-184 and hsa-mir-190b showed a significant positive correlation with SCGB2A expression. These markers were also upregulated in breast cancer tissues compared to normal tissues. Bioinformatics analysis revealed that hsa-mir-184 and hsa-mir-190b play important roles in cancer and cellular proliferation. These miRNAs target a wide range of genes, including sorting nexin 9 (SNX9) and annexin 6 (ANXA6), which are involved in membrane stability, vesicular trafficking, and cell mobility, and they contribute to cancer metastasis. CONCLUSION: The positive correlation among the expression of hsa-miR-184, hsa-miR-190b, and SCGB2A2 suggests that they may participate in shared biological pathways. These pathways govern critical cellular processes, such as membrane trafficking and cell signaling, which are frequently disrupted in cancer. Consequently, these findings enable a better understanding of the role of Mammaglobin in breast cancer signaling.

MicroRNAs (miRNAs)↗

Association between residential greenness and coronary heart disease: A proteomics and miRNA microarray analysis.

Greenness has been linked to cardiovascular disease. However, the specific biological mechanisms through which greenness impacts coronary heart disease (CHD) remain unclear. We aim to explore the underlying epigenetic mechanisms linking greenness and CHD by using proteomics and miRNA microarray. A total of 2387 participants were included in the population study, 816 of whom were diagnosed with CHD. Residential greenness exposure was characterized using the normalized difference vegetation index (NDVI). Generalized additive models and restricted cubic splines investigated the association between greenness and CHD. Mediation analysis examined whether cardiovascular metabolic risk factors (blood pressure, inflammation indicators, and glucose) mediated the association. After proteomics and miRNA microarray screening, Elisa and qRT-PCR validated selected proteins (THBS1, FCN3, and LTBP1) and miRNAs (miR-671-5p, miR-124-3p, and miR-379-5p) in CHD. Among these, LTBP1 and miR-379-5p showed significant differential expression (P&#xa0;<&#xa0;0.05) and were examined as potential molecular mediators. Higher greenness exposure within a 1000-m area was associated with a lower risk of CHD (OR: 0.86, 95&#xa0;% CI: 0.81, 0.92). Systolic blood pressure (6.32&#xa0;% [95&#xa0;% CI: 1.49&#xa0;%, 13.12&#xa0;%]), lymphocyte (10.98&#xa0;% [95&#xa0;% CI: 3.76&#xa0;%, 22.00&#xa0;%]), monocyte (9.94&#xa0;% [95&#xa0;% CI: 3.42&#xa0;%, 20.87&#xa0;%]), and fasting blood glucose (3.41&#xa0;% [95&#xa0;% CI: 0.56&#xa0;%, 7.84&#xa0;%]) mediated this association. LTBP1 and miR-379-5p were differentially expressed in CHD and mediated 7.19&#xa0;% [95&#xa0;% CI: 0.01&#xa0;%, 23.37&#xa0;%] and 20.03&#xa0;% [95&#xa0;% CI: 2.85&#xa0;%, 69.71&#xa0;%] of greenness effect on CHD, respectively. Combining the population study and experiments, we found that miR-379-5p and LTBP1 may jointly modulate vascular constriction and immune inflammation in the association between greenness and CHD.

Humans↗

Association of the pri-miR-34b/c rs4938723 T&#x2009;>&#x2009;C polymorphism with hepatoblastoma susceptibility in Eastern Chinese children: A five-center case-control study.

BACKGROUND: Hepatoblastoma is the most prevalent liver cancer affecting children, and its intricate causes are closely linked to genetic variations. This study interrogated the influence of the miR-34b/c rs4938723 T&#x2009;>&#x2009;C polymorphism in hepatoblastoma predisposition in a Han Chinese children study population, comprising 193 cases and 773 controls from East China. METHODS: Genotyping was performed via the TaqMan technique. The association between this genetic variant and hepatoblastoma susceptibility was determined via logistic regression models adjusted for age and sex. RESULTS: Our results show that the TC genotype of the miR-34b/c rs4938723 polymorphism is associated with a significantly reduced risk of hepatoblastoma under a heterozygous model (adjusted OR&#x2009;=&#x2009;0.59, 95% CI&#x2009;=&#x2009;0.41-0.84, P&#x2009;=&#x2009;0.003), whereas the CC genotype is associated with an increased risk under a recessive model (adjusted OR&#x2009;=&#x2009;1.79, 95% CI&#x2009;=&#x2009;1.17-2.73, P&#x2009;=&#x2009;0.008). Further stratified analysis revealed that the TC/CC genotypes were linked to a lower risk of hepatoblastoma in girls and those with advanced clinical stages (III&#x2009;+&#x2009;IV). Furthermore, we identified the miR-34b/c rs4938723 polymorphism as an expression quantitative trait locus that affects the expression of nearby genes. The CC genotype was related to a decrease in LAYN expression in the colon, brain, and lung and decreased PPP2R1B expression in the testis. These findings suggest that miR-34b/c rs4938723 T&#x2009;>&#x2009;C has the potential to modify hepatoblastoma predisposition through its regulatory effects on gene expression. CONCLUSIONS: This study provides evidence for the association between the miR-34b/c rs4938723 polymorphism and hepatoblastoma risk in Chinese Han children from East China, suggesting that this polymorphism may have potential as a biomarker for predicting hepatoblastoma susceptibility in this specific population.

Child↗