{"title":"Review of the Different Outcomes Produced by Genetic Knock Out of the Long Non-coding microRNA-host-gene MIR22HG <i>versus</i> Pharmacologic Antagonism of its Intragenic microRNA product miR-22-3p.","authors":"Marc Thibonnier, Sujoy Ghosh","doi":"10.2174/0122115366282339240604042154","DOIUrl":"10.2174/0122115366282339240604042154","url":null,"abstract":"<p><strong>Background: </strong>Publications reveal different outcomes achieved by genetically knocking out a long non-coding microRNA-host-gene (lncMIRHG) <i>versus</i> the administration of pharmacologic antagomirs specifically targeting the guide strand of such intragenic microRNA. This suggests that lncMIRHGs may perform diverse functions unrelated to their role as intragenic miRNA precursors.</p><p><strong>Objective: </strong>This review synthesizes <i>in silico, in vitro</i>, and <i>in vivo</i> findings from our lab and others to compare the effects of knocking out the long non-coding RNA MIR22HG, which hosts miR- 22, <i>versus</i> administering pharmacological antagomirs targeting miR-22-3p.</p><p><strong>Methods: </strong><i>In silico</i> analyses at the gene, pathway, and network levels reveal both distinct and overlapping targets of hsa-miR-22-3p and its host gene, MIR22HG. While pharmacological antagomirs targeting miR-22-3p consistently improve various metabolic parameters in cell culture and animal models across multiple studies, genetic knockout of MIR22HG yields inconsistent results among different research groups.</p><p><strong>Results: </strong>Additionally, MIR22HG functions as a circulating endogenous RNA (ceRNA) or \"sponge\" that simultaneously modulates multiple miRNA-mRNA interactions by competing for binding to several miRNAs.</p><p><strong>Conclusions: </strong>From a therapeutic viewpoint, genetic inactivation of a lncMIRHG and pharmacologic antagonism of the guide strand of its related intragenic miRNA produce different results. This should be expected as lncMIRHGs play dual roles, both as lncRNA and as a source for primary miRNA transcripts.</p>","PeriodicalId":38067,"journal":{"name":"MicroRNA (Shariqah, United Arab Emirates)","volume":" ","pages":"19-41"},"PeriodicalIF":1.6,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141477639","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Chandhru Srinivasan, Mano Chitra Karthikeyan, Abirami Jeyaprakash, Antony Joseph Velanganni Arockiam
{"title":"AAAGUGC Seed-Containing miRNAs: Master Regulators of Cancer Pathways and Therapeutic Resistance.","authors":"Chandhru Srinivasan, Mano Chitra Karthikeyan, Abirami Jeyaprakash, Antony Joseph Velanganni Arockiam","doi":"10.2174/0122115366365058250513110804","DOIUrl":"10.2174/0122115366365058250513110804","url":null,"abstract":"<p><p>MicroRNAs have emerged as pivotal post-transcriptional regulators, orchestrating a myriad of cellular processes critical to both normal physiology and pathological conditions, particularly cancer. Among these, miRNAs containing the highly conserved AAAGUGC seed sequence have garnered significant attention due to their multifaceted roles in cancer progression, acting as both oncogenes and tumour suppressors across a wide spectrum of malignancies. This review delves deeply into the evolutionary significance of AAAGUGC seed-containing miRNAs, elucidating their conserved nature and intricate roles in the regulation of cancer-related gene expression networks. We focused on eight specific miRNAs- miR-17-5p, miR-20a-5p, miR-93-5p, miR-106a-5p, miR-106b-5p, miR-519d-3p, miR-526b-3p, and miR-20b-5p -each of which demonstrates context-dependent oncogenic or tumour-suppressive behaviour. Through an indepth exploration of the molecular mechanisms by which these miRNAs modulate critical pathways, we highlighted their capacity to influence essential processes, including cell proliferation, apoptosis, epithelial-to-mesenchymal transition (EMT), metastasis, and drug resistance, reflecting the complexity of their regulatory roles. Furthermore, we dissected the intricate interactions between these miRNAs and their downstream targets, showcasing their diverse contributions to the tumour microenvironment. The implications of miRNA dysregulation in chemotherapy resistance were also explored. In conclusion, AAAGUGC seed-containing miRNAs represent a complex and evolutionarily conserved family with implications in cancer biology. Their ability to modulate multiple oncogenic and tumour-suppressive pathways highlights their potential as therapeutic targets or biomarkers in the context of personalized cancer treatment strategies. This review provides a comprehensive depth of current knowledge while proposing avenues for future research into the therapeutic manipulation of these miRNAs in combating cancer.</p>","PeriodicalId":38067,"journal":{"name":"MicroRNA (Shariqah, United Arab Emirates)","volume":" ","pages":"177-198"},"PeriodicalIF":1.6,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144182275","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ma'ayan V Levy, Hannah K Fandl, Jamie G Hijmans, Kelly A Stockelman, Samuel T Ruzzene, Whitney R Reiakvam, Zoe A Goldthwaite, Jared J Greiner, Christopher A DeSouza, Vinicius P Garcia
{"title":"Effect of 17β-Estradiol on Endothelial Cell Expression of Inflammation- Related MicroRNA.","authors":"Ma'ayan V Levy, Hannah K Fandl, Jamie G Hijmans, Kelly A Stockelman, Samuel T Ruzzene, Whitney R Reiakvam, Zoe A Goldthwaite, Jared J Greiner, Christopher A DeSouza, Vinicius P Garcia","doi":"10.2174/0122115366320085240716180112","DOIUrl":"10.2174/0122115366320085240716180112","url":null,"abstract":"<p><strong>Background: </strong>Estrogen plays a protective role in vascular health due, in part, to its regulation of endothelial inflammation. However, the mechanism(s) by which estrogen negatively regulates inflammatory signaling pathways is not completely understood. MicroRNAs (miRNAs) are recognized as sensitive and selective regulators of cardiovascular function, inflammation, and disease, yet the effects of 17β-estradiol on the endothelial miRNA profile are largely unknown.</p><p><strong>Objective: </strong>The aim of this study was to determine the effect of 17β-estradiol on the expression of inflammation-associated miRNAs in endothelial cells in vitro.</p><p><strong>Methods: </strong>Human Umbilical Vein Endothelial cells (HUVECs) were treated with media in the absence (control) and presence of 17β-estradiol (100 nM) for 24 hr. Thereafter, endothelial cell release of cytokines (IL-6 and IL-8), the intracellular expression of the central protein inflammatory mediator NF-κB, and the levels of inflammatory-associated miRNAs: miR-126, miR-146a, miR-181b, miR-204, and miR-Let-7a, were determined.</p><p><strong>Results: </strong>17β-estradiol-treated cells released significantly lower levels of IL-6 (47.6±1.5 pg/mL vs. 59.3±4.9 pg/mL) and IL-8 (36.3±2.3 pg/mL vs. 44.0±2.0 pg/mL). Cellular expression of total NF-κB (26.0±2.8 AU vs. 21.2±3.1 AU) was not different between groups; however, activated NF-κB (Ser536) (12.9±1.7 AU vs. 20.2±2.2 AU) was markedly reduced in 17β-estradiol-treated cells as compared to untreated cells. Furthermore, cellular expressions of miR-126 (1.8±0.3 fold), miR-146a (1.7±0.3 fold), miR-181b (2.1±0.4 fold), miR-204 (1.9±0.4 fold), and miR-Let-7a (1.8±0.3 fold) were markedly increased in response to 17β-estradiol treatment.</p><p><strong>Conclusion: </strong>These data suggest that the anti-inflammatory effect of 17β-estradiol in endothelial cells may be mediated by miRNAs.</p>","PeriodicalId":38067,"journal":{"name":"MicroRNA (Shariqah, United Arab Emirates)","volume":" ","pages":"3-8"},"PeriodicalIF":1.6,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141789302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hamid Jamialahmadi, Alireza Asadnia, Ghazaleh Khalili-Tanha, Reza Mohit, Hanieh Azari, Majid Khazaei, Mina Maftooh, Mohammadreza Nassiri, Seyed Mahdi Hassanian, Majid Ghayour-Mobarhan, Gordon A Ferns, Elham Nazari, Amir Avan
{"title":"Identification of miR-20a as a Diagnostic and Prognostic Biomarker in Colorectal Cancer: MicroRNA Sequencing and Machine Learning Analysis.","authors":"Hamid Jamialahmadi, Alireza Asadnia, Ghazaleh Khalili-Tanha, Reza Mohit, Hanieh Azari, Majid Khazaei, Mina Maftooh, Mohammadreza Nassiri, Seyed Mahdi Hassanian, Majid Ghayour-Mobarhan, Gordon A Ferns, Elham Nazari, Amir Avan","doi":"10.2174/0122115366320538240912080053","DOIUrl":"10.2174/0122115366320538240912080053","url":null,"abstract":"<p><strong>Introduction: </strong>The differential expression of miRNAs, a key regulator in many cell signaling pathways, has been studied in various malignancies and may have an important role in cancer progression, including colorectal cancer (CRC).</p><p><strong>Methods: </strong>The present study used machine learning and gene interaction study tools to explore the prognostic and diagnostic value of miRNAs in CRC. Integrative analysis of 353 CRC samples and normal tissue data was obtained from the TCGA database and further analyzed by R packages to define the deferentially expressed miRNAs (DEMs). Furthermore, machine learning and Kaplan Meier survival analysis helped better specify the significant prognostic value of miRNAs. A combination of online databases was then used to evaluate the interactions between target genes, their molecular pathways, and the correlation between the DEMs.</p><p><strong>Results: </strong>The results indicated that miR-19b and miR-20a have a significant prognostic role and are associated with CRC progression. The ROC curve analysis discovered that miR-20a alone and combined with other miRNAs, including hsa-mir-21 and hsa-mir-542, are diagnostic biomarkers in CRC. In addition, 12 genes, including NTRK2, CDC42, EGFR, AGO2, PRKCA, HSP90AA1, TLR4, IGF1, ESR1, SMAD2, SMAD4, and NEDD4L, were found to be the highest score targets for these miRNAs. Pathway analysis identified the two correlated tyrosine kinase and MAPK signaling pathways with the key interaction genes, i.e., EGFR, CDC42, and HSP90AA1.</p><p><strong>Conclusion: </strong>To better define the role of these miRNAs, the ceRNA network, including lncRNAs, was also prepared. In conclusion, the combination of R data analysis and machine learning provides a robust approach to resolving complicated interactions between miRNAs and their targets.</p>","PeriodicalId":38067,"journal":{"name":"MicroRNA (Shariqah, United Arab Emirates)","volume":" ","pages":"73-91"},"PeriodicalIF":1.6,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142355806","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Amir Mohammad Salehi, Fatemeh Torogi, Farid Azizi Jalilian, Razieh Amini
{"title":"The Potential Role of Curcumin as a Regulator of microRNA in Colorectal Cancer: A Systematic Review.","authors":"Amir Mohammad Salehi, Fatemeh Torogi, Farid Azizi Jalilian, Razieh Amini","doi":"10.2174/0122115366304114240904051429","DOIUrl":"10.2174/0122115366304114240904051429","url":null,"abstract":"<p><strong>Introduction: </strong>Curcumin is known as a bioactive component that is found in the rhizomes of <i>Curcuma longa</i>. Curcumin is well known for its chemo-preventive and anticancer properties. However, its anticancer mechanism in colorectal cancer treatment is unclear, and some studies have shown that many microRNAs (miRs) could be potential targets for curcumin in colorectal cancer (CRC) treatment, so there is a need for their integration and clarification.</p><p><strong>Methods: </strong>We systematically searched international databases, including PubMed, Scopus, and Web of Science, until July 2021 by using some relevant keywords.</p><p><strong>Results: </strong>The search resulted in 87 papers, among which there were 18 related articles. Curcumin was found to cause the upregulation of miR-497, miR-200c, miR-200b, miR-409-3p, miR-34, miR-126, miR-145, miR-206, miR-491, miR-141, miR-429, miR-101, and miR-15a and the downregulation of miR-21, miR-155, miR-221, miR-222, miR-17-5p, miR-130a, miR-27, and miR-20a.</p><p><strong>Conclusion: </strong>The present review study suggests that curcumin may be useful as a novel therapeutic agent for CRC by altering the expression level of miRs.</p>","PeriodicalId":38067,"journal":{"name":"MicroRNA (Shariqah, United Arab Emirates)","volume":" ","pages":"42-48"},"PeriodicalIF":1.6,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142297526","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ramazan Üzen, Fahri Bayram, Huseyin Dursun, Fatih Kardas, Mustafa Cakir, Md Mahmodul Hasan Sohel, Nurhan Cucer, Ahmet Eken, Hamiyet Donmez-Altuntas
{"title":"Tumor Suppressor and Oncogenic miRNA Expressions in Patients with Type I Gaucher Disease and Carriers.","authors":"Ramazan Üzen, Fahri Bayram, Huseyin Dursun, Fatih Kardas, Mustafa Cakir, Md Mahmodul Hasan Sohel, Nurhan Cucer, Ahmet Eken, Hamiyet Donmez-Altuntas","doi":"10.2174/0122115366342286250216032611","DOIUrl":"10.2174/0122115366342286250216032611","url":null,"abstract":"<p><strong>Introduction: </strong>Gaucher disease (GD) occurs due to a mutation in the glucosylceramidase (GBA) gene and is a common lysosomal storage disease. It is well known that there is a strong association between the abnormal expression of miRNAs and various diseases including cancer. These abnormally expressed miRNAs can be used as biomarkers. Interestingly, several studies have reported a linkage between GD with an increased risk of cancer. Therefore, in the current study, we investigated the expression levels of selected miRNAs that are associated with cancers that might have potential use as biomarkers in GD.</p><p><strong>Methods: </strong>Blood samples were collected from 24 healthy volunteers, 6 carriers, and 20 treated patients with type 1 GD. A reverse transcription-quantitative real-time PCR (RT-qPCR) platform was used to analyze the miRNA expression levels.</p><p><strong>Results: </strong>While carriers had lower relative expressions of miRNA-15a with tumor suppressor effect, and miRNA-150 and miRNA-181b with oncogene effect, treated patients with type 1 GD had lower relative expressions of miRNA-15a and miRNA-125b with tumor suppressor effect and higher relative expression miRNA-21 with oncogene effect (p<0.001, p<0.05, p<0.01, p<0.05, p<0.001, and p<0.05, respectively).</p><p><strong>Conclusion: </strong>The results suggested that the downregulation of miRNA-15a and miRNA-125b expressions with tumor suppressor effect and the upregulation of miRNA-21 expression with oncogene effect can be indicated to an increased risk for cancers such as multiple myeloma (MM), B-cell lymphoma, leukemia, and hepatocellular carcinoma (HCC) in GD.</p>","PeriodicalId":38067,"journal":{"name":"MicroRNA (Shariqah, United Arab Emirates)","volume":" ","pages":"246-253"},"PeriodicalIF":1.6,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143516818","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The Nobel Prize to Victor Ambros: The Opening of a New Frontier in Science.","authors":"Alberto Izzotti","doi":"10.2174/221153661401241128110117","DOIUrl":"https://doi.org/10.2174/221153661401241128110117","url":null,"abstract":"","PeriodicalId":38067,"journal":{"name":"MicroRNA (Shariqah, United Arab Emirates)","volume":"14 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144054788","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Periodontal Tissue Homoeostasis, Immunity, the Red Complex Pathogens, and Dysbiosis: Unraveling the microRNA Effect.","authors":"Swastik Mishra, Lakshmi Puzhankara","doi":"10.2174/0122115366305491240708060422","DOIUrl":"10.2174/0122115366305491240708060422","url":null,"abstract":"<p><p>microRNAs are a family of small, non-coding RNA molecules that can regulate the translation of messenger RNAs (mRNAs). Numerous miRNAs have been proposed as potential indicators for periodontal disease, and their regulation might serve as a potent means of restricting the disease process. MiRNAs act as important immune system regulators that promote the production of many cytokines, including interferon (IFN), tumour necrosis factor (TNF), and IL-1as well as RANK. Investigations pertaining to the use of specific miRNAs as therapeutic agents are underway. They can influence a variety of regulatory organs and target several genes. Additionally, distinct components of the same expression pathway can be controlled by combining miRNAs and their antagonists. In recent years, many miRNA delivery methods have been created for therapeutic applications. Studies pertaining to the role of miRNAs in periodontal disease pathogenesis may pave the way for the use of miRNAs as biomarkers of periodontal disease. A complete understanding of the role of miRNA in periodontal disease and its mechanism of action can pave the way towards therapeutic strategies that can reduce or even prevent the progression of periodontal diseases.</p>","PeriodicalId":38067,"journal":{"name":"MicroRNA (Shariqah, United Arab Emirates)","volume":" ","pages":"9-18"},"PeriodicalIF":1.6,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141789347","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Shakila Mohammadi, Mina Dehghani-Samani, Khatereh Firouzi-Farsani, Mohsen Dibaj, Shahrzad Zhaeentan
{"title":"Key LncRNAs Associated with Distant Metastasis in Breast Cancer: A System Biology Analysis.","authors":"Shakila Mohammadi, Mina Dehghani-Samani, Khatereh Firouzi-Farsani, Mohsen Dibaj, Shahrzad Zhaeentan","doi":"10.2174/0122115366319044241015065537","DOIUrl":"10.2174/0122115366319044241015065537","url":null,"abstract":"<p><strong>Introduction: </strong>Breast cancer (BC) is the most prevalent cancer among women globally. Metastasis is the leading cause of mortality in most cancers. Early BC detection before metastasis can enhance survival rates. Understanding BC metastasis mechanisms could aid in developing metastasis-specific treatments.</p><p><strong>Method: </strong>The role of long non-coding RNAs (lncRNA) in cancer progression is recognized, yet the importance of specific lncRNAs in BC, despite potential alterations, remains inadequately explored. We utilized bioinformatics tools to identify novel lncRNAs dysregulated in metastasis. To achieve this objective, the gene expression profile of GSE102484, encompassing metastatic and non-metastatic BC tissue samples, was analyzed using the limma package in R with cut-off criteria set at an adjusted p-value < 0.005 and |fold change (FC)| ≥ 0.5. We used WGCNA analysis to find co-expression genes for lncRNAs. Then, we identified hub genes and performed pathway enrichment to better understand the results. Considering the defined criteria, eight novels of dysregulated lncRNAs and top 10 miRNAs were identified.</p><p><strong>Result: </strong>Dysregulated lncRNAs are found in yellow, green, brown, purple, and turquoise co-expression modules from WGCNA analysis. Enrichment analysis of these co-expressed modules revealed relevant pathways to metastasis, such as epithelial-to-mesenchymal transition and integrin cell-surface interactions, as well as regulation of HIF1-alpha. In addition, SDPR, TGFB1I1, ILF3, KIF4A, and COL5A1 were identified as hub genes. Based on DElncRNA-miRNADEmRNA connections and co-expression, we ultimately constructed lncRNA-associated ceRNA axes.</p><p><strong>Conclusion: </strong>The current study may identify novel lncRNAs implicated in BC metastasis; still, additional research is required to determine the potential functions of these lncRNAs in BC metastasis.</p>","PeriodicalId":38067,"journal":{"name":"MicroRNA (Shariqah, United Arab Emirates)","volume":" ","pages":"124-135"},"PeriodicalIF":1.6,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142548143","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Rachel Sarah Royfman, Joseph Riley McTague, Meghana Ranabothu, Bindu Menon
{"title":"Extrahepatic and Circulating miR-122: Diagnostic Implications and Future Directions.","authors":"Rachel Sarah Royfman, Joseph Riley McTague, Meghana Ranabothu, Bindu Menon","doi":"10.2174/0122115366334187250116164121","DOIUrl":"10.2174/0122115366334187250116164121","url":null,"abstract":"<p><p>Research on microRNAs is constantly expanding and evolving due to their role in the regulation of gene expression. miR-122, a 22-nucleotide microRNA, was first discovered as a liver-specific miRNA. Subsequently, it was found to be present in a wide range of tissues, such as the breast, testes, ovaries, and heart. The research on miR-122 in the liver has been extensive over the past few decades, leading to several important discoveries. However, its role in extrahepatic tissues is largely incompletely understood. Therefore, in light of the established clinical relevance of miR-122 as a potential biomarker and/or drug target in the liver, available information on miR-122 is compiled as it pertains to health and disease. This review discusses novel information generated in recent years and the corresponding progress in our understanding of the physiology of extrahepatic miR-122.</p>","PeriodicalId":38067,"journal":{"name":"MicroRNA (Shariqah, United Arab Emirates)","volume":" ","pages":"93-100"},"PeriodicalIF":1.6,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143034650","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}