{"type": "root", "children": [{"type": "p", "children": [{"type": "t", "text": "\nMicroRNAs play diverse roles in regulating cellular processes, including oncogenesis and immune modulation. For example, one study explored plasma miRNAs as potential biomarkers for hepatocellular carcinoma determination, underscoring the broad diagnostic and regulatory relevance of these small RNAs."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "1"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nWithin this extensive family, miR‑764‑5p has been uniquely characterized in the context of bone biology. In osteoblast progenitor cells, miR‑764‑5p is up‐expressed during differentiation and exerts a positive regulatory effect by targeting the 3′‑untranslated region of CHIP mRNA. By repressing CHIP protein translation—a protein that normally acts as a negative regulator of osteoblast differentiation—miR‑764‑5p facilitates osteoblast lineage commitment. Functional experiments showed that enforced expression of miR‑764‑5p decreased CHIP levels and promoted differentiation, while its inhibition elevated CHIP levels and impaired osteoblast formation; these effects were reversible by modulating CHIP expression."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "2"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nOther studies provided in this collection have delineated roles for nonclassical MHC molecules in immune regulation. For instance, investigations into murine natural killer cell receptors revealed distinct interactions between Ly49 receptors and MHC‑Ib molecules such as H2‑Q10, which influence NK cell function and the development of liver‐resident immune subsets."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "3"}]}, {"type": "t", "text": " Similarly, modifications of the CD8 coreceptor through ADP‑ribosylation have been implicated in modulating interactions with nonclassical MHC, adding an extra layer of immune regulation."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "5"}]}, {"type": "t", "text": " Although these studies emphasize the multifaceted contributions of microRNAs and MHC molecules to disease and immunity, only the work on miR‑764‑5p directly illuminates its function in promoting osteoblast differentiation.\n"}]}, {"type": "rg", "children": [{"type": "r", "ref": 1, "children": [{"type": "t", "text": "Yi Chen, Jin Chen, Yizhao Liu, et al. "}, {"type": "b", "children": [{"type": "t", "text": "Plasma miR-15b-5p, miR-338-5p, and miR-764 as Biomarkers for Hepatocellular Carcinoma."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Med Sci Monit (2015)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.12659/MSM.893082"}], "href": "https://doi.org/10.12659/MSM.893082"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "26119771"}], "href": "https://pubmed.ncbi.nlm.nih.gov/26119771"}]}, {"type": "r", "ref": 2, "children": [{"type": "t", "text": "Junwei Guo, Fangli Ren, Yinyin Wang, et al. "}, {"type": "b", "children": [{"type": "t", "text": "miR-764-5p promotes osteoblast differentiation through inhibition of CHIP/STUB1 expression."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "J Bone Miner Res (2012)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1002/jbmr.1597"}], "href": "https://doi.org/10.1002/jbmr.1597"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "22407479"}], "href": "https://pubmed.ncbi.nlm.nih.gov/22407479"}]}, {"type": "r", "ref": 3, "children": [{"type": "t", "text": "Lucy C Sullivan, Richard Berry, Natasha Sosnin, et al. "}, {"type": "b", "children": [{"type": "t", "text": "Recognition of the Major Histocompatibility Complex (MHC) Class Ib Molecule H2-Q10 by the Natural Killer Cell Receptor Ly49C."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "J Biol Chem (2016)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1074/jbc.M116.737130"}], "href": "https://doi.org/10.1074/jbc.M116.737130"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "27385590"}], "href": "https://pubmed.ncbi.nlm.nih.gov/27385590"}]}, {"type": "r", "ref": 4, "children": [{"type": "t", "text": "Katharine J Goodall, Angela Nguyen, Aya Matsumoto, et al. "}, {"type": "b", "children": [{"type": "t", "text": "Multiple receptors converge on H2-Q10 to regulate NK and γδT-cell development."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Immunol Cell Biol (2019)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1111/imcb.12222"}], "href": "https://doi.org/10.1111/imcb.12222"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "30537346"}], "href": "https://pubmed.ncbi.nlm.nih.gov/30537346"}]}, {"type": "r", "ref": 5, "children": [{"type": "t", "text": "Katharine Jennifer Goodall, Angela Nguyen, Daniel Mark Andrews, et al. "}, {"type": "b", "children": [{"type": "t", "text": "Ribosylation of the CD8αβ heterodimer permits binding of the nonclassical major histocompatibility molecule, H2-Q10."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "J Biol Chem (2021)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1016/j.jbc.2021.101141"}], "href": "https://doi.org/10.1016/j.jbc.2021.101141"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "34478713"}], "href": "https://pubmed.ncbi.nlm.nih.gov/34478713"}]}]}]}