{"type": "root", "children": [{"type": "p", "children": [{"type": "t", "text": "\nAlthough none of the provided abstracts describe a direct role for MIR6732 itself, one study does report on a microRNA—miR‐6723—whose regulation by the transcription factor HOXB5 appears to contribute to the malignant progression of pancreatic cancer. In that work, HOXB5 was shown to bind specific synergy motifs to up‐regulate miR‐6723, thereby promoting cancer cell proliferation, invasiveness, and the acquisition of stem‐like properties along with enhanced epithelial–mesenchymal transition."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "1"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nThe remaining abstracts, while not addressing MIR6732, provide an extensive overview of the functions of the ganglioside GM2 activator protein (GM2AP) in diverse biological settings. GM2AP is implicated in the lysosomal targeting of sphingolipid activator proteins in Sertoli cells—a process shown to depend on interactions involving sortilin and clathrin adaptors."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "2"}]}, {"type": "t", "text": " In another study, GM2AP was found to interfere with the hydrolysis of multiple phospholipids by inhibiting phospholipase D activity, hinting at a broader role in membrane lipid regulation."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "3"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nAdditional reports extend the functional repertoire of GM2AP by linking it to metabolic and reproductive processes. In adipocytes, increased GM2AP expression during adipogenesis and in obesity is associated with disrupted insulin receptor signaling and altered glucose metabolism."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "4"}]}, {"type": "t", "text": " Moreover, in the testis, GM2AP localizes to Sertoli cell lysosomes and is transiently associated with developing acrosomal structures in spermatids, suggesting an important role in spermatogenesis."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "6"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nTaken together, while there is no direct discussion of MIR6732 in these abstracts, the observation that HOXB5 up‐regulates miR‐6723 in pancreatic cancer"}, {"type": "fg", "children": [{"type": "fg_f", "ref": "1"}]}, {"type": "t", "text": "implies that similar microRNAs may participate in fine‐tuning cellular processes that overlap with the diverse functions of GM2AP in lysosomal trafficking, lipid metabolism, and cellular signaling.\n"}]}, {"type": "rg", "children": [{"type": "r", "ref": 1, "children": [{"type": "t", "text": "Zhi-Xi Li, Gang Wu, Wen-Jun Jiang, et al. "}, {"type": "b", "children": [{"type": "t", "text": "HOXB5 promotes malignant progression in pancreatic cancer via the miR-6732 pathway."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Cell Cycle (2020)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1080/15384101.2019.1707456"}], "href": "https://doi.org/10.1080/15384101.2019.1707456"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "31876226"}], "href": "https://pubmed.ncbi.nlm.nih.gov/31876226"}]}, {"type": "r", "ref": 2, "children": [{"type": "t", "text": "A Jacob Hassan, Jibin Zeng, Xiaoyan Ni, et al. "}, {"type": "b", "children": [{"type": "t", "text": "The trafficking of prosaposin (SGP-1) and GM2AP to the lysosomes of TM4 Sertoli cells is mediated by sortilin and monomeric adaptor proteins."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Mol Reprod Dev (2004)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1002/mrd.20096"}], "href": "https://doi.org/10.1002/mrd.20096"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "15236333"}], "href": "https://pubmed.ncbi.nlm.nih.gov/15236333"}]}, {"type": "r", "ref": 3, "children": [{"type": "t", "text": "Yoshimi Shimada, Yu-Teh Li, Su-Chen Li "}, {"type": "b", "children": [{"type": "t", "text": "Effect of GM2 activator protein on the enzymatic hydrolysis of phospholipids and sphingomyelin."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "J Lipid Res (2003)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1194/jlr.M200234-JLR200"}], "href": "https://doi.org/10.1194/jlr.M200234-JLR200"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "12576516"}], "href": "https://pubmed.ncbi.nlm.nih.gov/12576516"}]}, {"type": "r", "ref": 4, "children": [{"type": "t", "text": "Kiyoshi Higashi, Toshiyuki Mikami, Toru Yamada, et al. "}, {"type": "b", "children": [{"type": "t", "text": "A novel adipokine GM2AP impairs insulin signaling."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Biochem Biophys Res Commun (2010)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1016/j.bbrc.2010.10.110"}], "href": "https://doi.org/10.1016/j.bbrc.2010.10.110"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "21036149"}], "href": "https://pubmed.ncbi.nlm.nih.gov/21036149"}]}, {"type": "r", "ref": 5, "children": [{"type": "t", "text": "Kiyoshi Higashi, Hideki Kubo, Hiroyuki Watanabe, et al. "}, {"type": "b", "children": [{"type": "t", "text": "Adipokine ganglioside GM2 activator protein stimulates insulin secretion."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "FEBS Lett (2011)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1016/j.febslet.2011.07.012"}], "href": "https://doi.org/10.1016/j.febslet.2011.07.012"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "21784073"}], "href": "https://pubmed.ncbi.nlm.nih.gov/21784073"}]}, {"type": "r", "ref": 6, "children": [{"type": "t", "text": "Yu-Teh Li, Su-Chen Li, I-Li Chen "}, {"type": "b", "children": [{"type": "t", "text": "Expression of the GM2 activator protein in mouse testis."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Reprod Biol (2017)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1016/j.repbio.2017.10.004"}], "href": "https://doi.org/10.1016/j.repbio.2017.10.004"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "29100724"}], "href": "https://pubmed.ncbi.nlm.nih.gov/29100724"}]}]}]}