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Srivastava PP, Dasari A, Kumar S, Gupta I, Jain D, Minocha S. Epigenetic co-regulator HCF-1 promotes lung cancer via O-GlcNAcylation-dependent pathways. Molecular therapy. Oncology 2025 33(4) 41018975
Abstract:
The rise in the incidences of lung cancer currently poses a global health challenge, making it crucial to understand the underlying molecular and cellular mechanisms. Host cell factor-1 (HCF-1), a conserved epigenetic transcriptional co-regulator, undergoes proteolytic maturation and glycosylation by O-linked N-acetylglucosamine (O-GlcNAc) transferase (OGT). Elevated O-GlcNAc and OGT levels have been observed in lung cancer, highlighting their potential significance in disease progression. In human lung cancer tissues, we observed a significant upregulation of HCF-1, which coincides with increased OGT, O-GlcNAc, and Nkx2.1 (a diagnostic marker for non-small cell lung cancer [NSCLSC]) levels. To further explore HCF-1's role mechanistically, we utilized the NSCLC cell lines, where HCF-1 depletion resulted in reduced proliferation, O-GlcNAcylation, Nkx2.1 expression, and O-GlcNAcylated proteins upon wheat germ agglutinin (WGA) pull-down, reinforcing its role in lung cancer progression. Additionally, Nkx2.1-mediated conditional knockout of HCF-1 impaired murine lung development and cell proliferation. Interestingly, OGT inhibition with OSMI-1 also reduced HCF-1, Nkx2.1 levels, and proliferation, suggesting a role for O-GlcNAcylation in HCF-1-mediated signaling cascades. Thus, our findings elucidate the critical role of HCF-1 and O-GlcNAcylation in lung cancer pathogenesis. These insights not only deepen our understanding of lung cancer pathogenesis but also identify potential molecular targets for studies aimed at intervention.
O-GlcNAc proteins:
MET, UBR4, MAL2, S38A2, CC157, K2C1, K1C28, K2C78, ATAD3, NEMO, TEX14, MYO1C, PLOD2, TRNK1, MRP3, DAG1, K1C9, MRP1, SPIT2, CAH12, GTR3, S22A3, KRT37, K1C15, AG10B, TRYP, ATPB, K1C14, CASA1, CASA2, CASB, ALBU, ALBU, K2C6B, RPN1, AT1A1, ARGI1, ITB1, ATPG, K2C8, K2C8, K1C10, CEAM5, ANXA2, 4F2, K1C16, MYL4, GTR1, LAMP1, K2C8, CASK, KPYM, MYL4, CSF1R, LAMP2, K1C10, K2C5, CD44, HS71L, DDX5, AT1A1, K1C19, K1C15, K2C4, HSP7C, ATPA, ITA6, SFPQ, ITA3, STOM, SC6A9, MMP3, K1C9, MYH9, K22E, NUP62, HSPA9, CEAM6, AL3B2, K2C6C, NEST, EFTU, K2C6A, SERPH, ANXA1, K1C19, S12A2, GTR3, ACTB, LACB, EF1A1, LYSC, TBA1B, HNRPU, MLRA, LAT1, EWS, AK1C1, K2C75, K1C25, MPPA, ACTB, BIP, K2C8, ASPH, PTPRJ, TPBG, K2C79, AAAT, SYPL1, DREB, SCRN3, K2C7, DDX47, TBB5, PLD3, IRAK1, NOP56, K22E, WDR19, K22O, USH1G, K2C6A, AT1B1, ATPG, RPAP2, K2C5, SYCP3, MOR2A, K1C10, CARL2, K1C15, K2C1B, K2C4, K2C1, K2C73, PRP8, NEK5, SMHD1, RS4X, MYG, K2C74, NUP54, MYH14, LRP10, K2C1B, MRP1, UBIQ, BASI, AMGO2, MTA70, K2C73, ACTBL, HID1, LRC8A, K2C78, S15A4, PLAK, ADT2, CC110, RPAP2, MUS81, NICA, MRP2, DCBD2, NUP88, HNRL1, MENT, NUP58, S12A9, DYH6, K1C20, TSN10, ANTR1, KRT82, UQCC1, UGGG2, MYOF, TMEM9, CE290, ABCG2, XCT, NPTN, AGRG1, S12A7, SQOR, B3A2
Species: Bos taurus, Cavia porcellus, Macaca fascicularis, Bos mutus grunniens, Potorous tridactylus, Canis lupus familiaris, Ovis aries, Camelus dromedarius, Felis catus, Gorilla gorilla gorilla, Ailuropoda melanoleuca, Mesocricetus auratus, Echinops telfairi, Rattus norvegicus, Sus scrofa, Oryctolagus cuniculus, Mus musculus, Pan troglodytes, Homo sapiens, Bubalus bubalis, Chlorocebus aethiops, Equus caballus, Ovis aries musimon
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Sacoman JL, Dagda RY, Burnham-Marusich AR, Dagda RK, Berninsone PM. Mitochondrial O-GlcNAc Transferase (mOGT) Regulates Mitochondrial Structure, Function, and Survival in HeLa Cells. The Journal of biological chemistry 2017 292(11) 28100784
Abstract:
O-Linked N-acetylglucosamine transferase (OGT) catalyzes O-GlcNAcylation of target proteins and regulates numerous biological processes. OGT is encoded by a single gene that yields nucleocytosolic and mitochondrial isoforms. To date, the role of the mitochondrial isoform of OGT (mOGT) remains largely unknown. Using high throughput proteomics, we identified 84 candidate mitochondrial glycoproteins, of which 44 are novel. Notably, two of the candidate glycoproteins identified (cytochrome oxidase 2 (COX2) and NADH:ubiquinone oxidoreductase core subunit 4 (MT-ND4)) are encoded by mitochondrial DNA. Using siRNA in HeLa cells, we found that reducing endogenous mOGT expression leads to alterations in mitochondrial structure and function, including Drp1-dependent mitochondrial fragmentation, reduction in mitochondrial membrane potential, and a significant loss of mitochondrial content in the absence of mitochondrial ROS. These defects are associated with a compensatory increase in oxidative phosphorylation per mitochondrion. mOGT is also critical for cell survival; siRNA-mediated knockdown of endogenous mOGT protected cells against toxicity mediated by rotenone, a complex I inhibitor. Conversely, reduced expression of both nucleocytoplasmic (ncOGT) and mitochondrial (mOGT) OGT isoforms is associated with increased mitochondrial respiration and elevated glycolysis, suggesting that ncOGT is a negative regulator of cellular bioenergetics. Last, we determined that mOGT is probably involved in the glycosylation of a restricted set of mitochondrial targets. We identified four proteins implicated in mitochondrial biogenesis and metabolism regulation as candidate substrates of mOGT, including leucine-rich PPR-containing protein and mitochondrial aconitate hydratase. Our findings suggest that mOGT is catalytically active in vivo and supports mitochondrial structure, health, and survival, whereas ncOGT predominantly regulates cellular bioenergetics.
O-GlcNAc proteins:
A6QQ83, B1WBY5, D4A1Y5, E1BJA2, C1QBP, O62828, HCD2, IDH3B, AKAP1, NDUAC, CY1, QCR7, DHE3, COX41, COX5A, COX5B, THTR, ATPB, ADT1, NU4M, ATPD, ATPG, HXK1, CX6A2, KAD2, NNTM, IVD, MPCP, AATM, CX7A2, GLSK, QCR8, AT5F1, ATP5H, ATPO, ABCD3, ATPA, NB5R3, QCR2, SDHA, QCR1, 3HIDH, CPT1A, NDUAA, PRDX2, NDUS7, NDUB4, ODPB, VDAC2, COX2, FIS1, M2OM, NDUA4, NDUB7, NDUA2, NDUB8, NDUBA, NDUB5, NDUC2, IDHP, NDUA7, COQ5, LETM1, ATPK, CISY, Q2NL19, COQ9, MDHM, ATAD3, SDHB, STML2, HSDL2, LONM, NDUA9, TOM20, AMPL, Q7TQ85, NDUBB, HINT2, NDUAD, SFXN3
Species: Bos taurus, Homo sapiens, Rattus norvegicus
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