O-linked N-acetylglucosaminidase / Summit Therapeutics - LARVOL DELTA

Cross-Talk Between Tau O-GlcNAcylation and the Formation of the Early Driver of Neurodegeneration (Cis P-Thr231-Pro Tau) in Primary Cortical Neurons. (PubMed, Mol Neurobiol) - "Additionally, we observed that the Trans p-Tau conformation represents a normal conformer under physiological conditions. Collectively, our data support tau O-GlcNAcylation as a promising therapeutic strategy for Alzheimer's disease and other tauopathies."

Journal • Alzheimer's Disease • CNS Disorders • OGA • PTH2R

Safety, Tolerability, Pharmacokinetics, and Brain Target Occupancy of the OGA Inhibitor ASN90 in Healthy Participants. (PubMed, Mov Disord) - P2 | "The phase 1 results of ASN90 in healthy participants provide strong support for its further development in progressive supranuclear palsy (PSP) and AD. Currently, Ferrer Internacional, S.A. is conducting a phase 2 study, known as PROSPER (ClinicalTrials.gov ID: NCT06355531), to evaluate the efficacy, safety, and pharmacokinetics of ASN90 in slowing the progression of PSP."

Clinical • Journal • PK/PD data • Alzheimer's Disease • CNS Disorders • Movement Disorders • Parkinson's Disease • Progressive Supranuclear Palsy

Hyp-101 reduced tau-associated pathology and cognitive dysfunction via OGA inhibition. (Neuroscience 2025) - "In vivo, oral administration every other day-starting two weeks after intracerebral ventricular injection of streptozotocin significantly improved cognitive performance in mice, while increasing brain O-GlcNAc levels and reducing levels of hyperphosphorylated tau. These findings support the therapeutic potential of OGA inhibition as a strategy to alleviate tau-related pathology and cognitive deficits in Alzheimer's disease."

Alzheimer's Disease • CNS Disorders • Cognitive Disorders • Dementia • OGA

Regulation of Metabolic Homeostasis By TRAF6 Contributes to the Leukemia Progression (ASH 2023) - "The treatment with MK8719 (OGA inhibitor) mildly, but significantly, restored the number of TRAF6 knockdown AML cells, which was correlated with the changes in mitochondrial function, indicating that O-GlcNAc modification regulated by TRAF6 is important for AML progression. In summary, We provide evidence for the oncogenic function of TRAF6 in leukemia, and shed light on the novel TRAF6/OGT/O-GlcNAc axis that regulates the metabolic reprogramming required for leukemogenesis."

IO biomarker • Hematological Malignancies • Leukemia • Myelodysplastic Syndrome • Oncology • Targeted Protein Degradation • OGA • OGT • TRAF6

Loss of Negative Metabolic Feedback Drives TET2 Mutant Inflammation (ASH 2024) - "In response to nutrient cues, TET2 physiologically binds OGT on chromatin thus restraining its activity. Upon TET2 loss, OGT binding to genomic loci is increased causing metabolic hyperactivity and lipid accumulation, ultimately driving inflammation."

Hematological Malignancies • Inflammation • Metabolic Disorders • Oncology • ACLY • KIT • OGT • TET2

Safety, Tolerability and Pharmacokinetics of a Novel Oral OGA Inhibitor (FNP-223) First-in-Human Phase 1 Study (MDS Congress 2025) - "Objective: To evaluate the safety, tolerability, and pharmacokinetics of FNP-223 (formerly ASN90) in healthy volunteers (HV). The findings indicate that FNP-223 is safe and well-tolerated at doses ranging from 100 to 500 mg, administered twice a day in HV. Additionally, the observed dose proportionality, along with the CSF-to-plasma ratios for both Cmax and AUC, suggests that the unbound fraction of the drug can effectively diffuse across the human blood-brain barrier. This study, along with PET-based target engagement assessments, supports the continued clinical development of FNP-223 in the ongoing Phase 2 PROSPER trial involving patients with PSP."

Clinical • First-in-human • P1 data • PK/PD data • CNS Disorders • Proteinopathy

OGA inhibition as a potential therapeutic approach for tauopathies: The prosper study, a phase 2 trial in PSP (EAN 2025) - "FNP-223 represents a promising therapeutic approach targeting tau pathology in PSP. The PROSPER study will determine its potential as a disease-modifying agent for PSP, addressing an urgent unmet need in this population."

P2 data • CNS Disorders • Movement Disorders • Progressive Supranuclear Palsy • OGA

Enhancing protein O-GlcNAcylation in down syndrome mice mitigates memory dysfunctions through the rescue of mitochondrial bioenergetics, stress responses and pathological markers. (PubMed, Redox Biol) - "Functional improvements translated in enhanced recognition memory in Ts2Cje mice. Our study highlights the pivotal role of altered protein O-GlcNAcylation in DS neuropathology and establishes the molecular basis to envision the O-GlcNAc process as a promising therapeutic target to mitigate genetic- and metabolism-driven brain alterations linked to redox imbalance, mitochondrial failure and the development of AD features."

Journal • Preclinical • Alzheimer's Disease • CNS Disorders • Developmental Disorders • Genetic Disorders • Solid Tumor • OGA

FTO O-GlcNAcylation promotes TRIM21-mediated FTO ubiquitination degradation to sustain the negative feedback control of macrophage inflammation. (PubMed, Front Immunol) - "These findings reveal a mechanism that FTO O-GlcNAcylation promotes its ubiquitination degradation, and thus induces Socs1 m6A methylation and downregulates LPS-mediated inflammatory response, which maintains the negative feedback control of macrophage inflammatory cytokine storm in sepsis. Regulation of FTO O-GlcNAcylation may offer a potential therapeutic strategy for combating endotoxin-induced inflammatory disease and other FTO abnormal expression-associated diseases."

Journal • Genetic Disorders • Infectious Disease • Inflammation • Obesity • Septic Shock • Targeted Protein Degradation • FAT2 • FTO • IL1B • IL6 • SOCS1 • TNFA • TRIM21

In vivo quantification of [11C]BIO-1819578 in non-human primates, a novel radioligand for O-GlcNAcase. (PubMed, J Cereb Blood Flow Metab) - "The results showed that [11C]BIO-1819578 has suitable characteristics for reliable quantification of OGA using full kinetic modelling. The effective dose was on par with other 11C radioligands and is unlikely to pose an issue for human use."

Journal • Preclinical • Alzheimer's Disease • CNS Disorders • OGA

OGA INHIBITION AS A POTENTIAL THERAPEUTIC APPROACH FOR TAUOPATHIES: THE PROSPER STUDY, A PHASE 2 TRIAL IN PSP (ADPD 2025) - "FNP-223 is a promising disease -modifying therapy for PSP that is being studied to assess safety, tolerability, and efficacy in slowing disease progression in patients with PSP: the Phase 2 PROSPER study."

P2 data • CNS Disorders • Movement Disorders • Progressive Supranuclear Palsy

EVIDENCE FOR OGA INHIBITION TO IMPACT NEURODEGENERATIVE PATHOLOGIES (ADPD 2025) - P1 | "Conclusions Nonclinical data indicated OGA inhibition has the potential to be an effective treatment for AD and suggested a manageable safety profile to move ceperognastat into clinical studies. However, lack of efficacy in a phase 2 study in early symptomatic AD suggests the potential for further clinical development needs to be considered carefully."

Alzheimer's Disease • Cardiovascular • CNS Disorders • OGA

OGA INHIBITION AS A POTENTIAL THERAPEUTIC APPROACH FOR TAUOPATHIES: THE PROSPER STUDY, A PHASE 2 TRIAL IN PSP (ADPD 2025) - "FNP-223 is a promising disease-modifying therapy for PSP that is being studied to assess safety, tolerability, and efficacy in slowing disease progression in patients with PSP: the Phase 2 PROSPER study."

P2 data • CNS Disorders • Movement Disorders • Progressive Supranuclear Palsy • OGA

Brain Transcriptome Changes Associated With an Acute Increase of Protein O-GlcNAcylation and Implications for Neurodegenerative Disease. (PubMed, J Neurochem) - "Data from this analysis will enable the evaluation of the mechanisms underlying the impact of OGA inhibition in the treatment of AD. In particular, OGA inhibitors appear to have downstream effects related to bioenergetics which may limit their therapeutic benefits."

Journal • Alzheimer's Disease • CNS Disorders • AMPK • OGA

An Efficient and Accessible Hectogram-Scale Synthesis for the Selective O-GlcNAcase Inhibitor Thiamet-G. (PubMed, ACS Omega) - "Herein is described a scalable method to produce Thiamet-G, a potent, selective, and widely used brain-permeable OGA inhibitor. This synthetic route begins with inexpensive precursor, requires no column chromatography, employs simple nontoxic reagents, and in a single campaign can furnish several hundred grams of crystalline Thiamet-G in an overall yield of 44% over six steps."

Journal • CNS Disorders • Oncology • OGA

OGT mediated HDAC5 O-GlcNAcylation promotes osteogenesis by regulating the homeostasis of epigenetic modifications and proteolysis. (PubMed, J Orthop Translat) - "On one side, OGT might potentially be used as a new biomarker for clinical diagnosis of osteoporosis (OP) in the future. On the other side, small molecule inhibitors of HDAC5, a glycosylation substrate of OGT, or OGT agonists such as silymarin, could all potentially serve as therapeutic targets for the prevention or treatment of OP in the future."

Journal • Osteoporosis • Rheumatology • Targeted Protein Degradation • HDAC5 • OGT

Opportunities for Therapeutic Modulation of O-GlcNAc. (PubMed, Chem Rev) - "In this review, we describe the characterization and biochemistry of OGT and OGA, cellular O-GlcNAc regulation, development of OGT and OGA inhibitors, O-GlcNAc in pathophysiology, clinical progress of O-GlcNAc modulators, and emerging opportunities for targeting O-GlcNAc. This comprehensive resource should motivate further study into O-GlcNAc function and inspire strategies for therapeutic modulation of O-GlcNAc."

Journal • Review • CNS Disorders • Developmental Disorders • Diabetes • Immunology • Mental Retardation • Metabolic Disorders • Oncology • OGA

Investigating the effects of increased O-GlcNAcylation on glial cell morphology and noradrenergic innervation in TgF344-AD rats (Neuroscience 2024) - "Tg animals did have an increase in abnormal TH innervation in the hilus of the dentate gyrus compared to non-Tg rats. These studies shed light on how increasing O-GlcNAc in non-Tg and Tg animals affects noradrenergic innervation and amyloid pathology, which could give further insights into the current clinical trials."

Preclinical • Alzheimer's Disease • CNS Disorders • APP • GFAP • OGA

Acute increase of protein O-GlcNAcylation in mice leads to transcriptome changes in the brain opposite to what is observed in Alzheimer's Disease. (PubMed, bioRxiv) - "Data from this analysis will enable the evaluation of the mechanisms underlying the potential benefits of OGA inhibition in the treatment of AD. In particular, although OGA inhibitors are promising to treat AD, their downstream chronic effects related to bioenergetics may be a limiting factor."

Journal • Preclinical • Alzheimer's Disease • CNS Disorders • OGA

Discovery of 4-(Arylethynyl)piperidine Derivatives as Potent Nonsaccharide O-GlcNAcase Inhibitors for the Treatment of Alzheimer's Disease. (PubMed, J Med Chem) - "Additionally, the appropriate plasma PK and beneficial BBB penetration properties were also observed. Compound 81 deserves to be further explored as an anti-AD agent."

Journal • Alzheimer's Disease • CNS Disorders • Cognitive Disorders • OGA

Isoindoline-based fluorogenic probes bearing a self-immolative linker for the sensitive and selective detection of O-GlcNAcase activity. (PubMed, Chem Commun (Camb)) - "Here, we synthesized fluorogenic probes for OGA by grafting GlcNAc directly or using a self-immolative linker to the hydroxyl position of 4-hydroxylisoindoline (BHID), a typical excited-state intramolecular proton transfer (ESIPT) probe. The probe was used for a fluorogenic assay to determine the half maximal inhibitory concentration of a known OGA inhibitor and differentiate between OGA and hexosaminidase when GlcNAc is replaced by GlcNPr, where a propionyl group is used instead of an acetyl group."

Journal • OGA

Mild therapeutic hypothermia upregulates the O-GlcNAcylation level of COX10 to alleviate mitochondrial damage induced by myocardial ischemia-reperfusion injury. (PubMed, J Transl Med) - "In summary, MTH activates OGT mediated O-glycosylation modified COX10 to regulate mitochondrial function and improve myocardial ischemia-reperfusion injury, which provides important theoretical basis for the clinical application of MTH."

Journal • Cardiovascular • Myocardial Ischemia • Reperfusion Injury • COX10

MUC4 O-GlcNAcylation Regulates the Epithelial Phenotype in Conjunctival Epithelial Cells. (PubMed, Biochem Genet) - "Above findings suggested that OGT/OGA inhibitor regulated MUC4 protein level by affecting MUC4 O-GlcNAcylation to regulate ZO-1, GJB2, CLDN8, and E-cadherin protein levels in HConEpic cells, which was achieved via inhibiting the interaction between OGT/OGA and MUC4. This study may provide a better understanding of the pathogenesis of allergic conjunctivitis (AC)."

Journal • Conjunctivitis • Ocular Infections • Ocular Inflammation • Ophthalmology • CDH1 • CLDN8 • IL4 • MUC4 • OGT • TJP1

The O-GlcNAc Modification of Recombinant Tau Protein and Characterization of the O-GlcNAc Pattern for Functional Study. (PubMed, Methods Mol Biol) - "The use of the O-GlcNAc tau protein in functional studies requires the analytical characterization of the O-GlcNAc pattern. Here, we describe a method for the O-GlcNAc modification of tau protein with recombinant OGT and the analytical characterization of the resulting O-GlcNAc pattern by a combination of methods for the overall characterization of tau O-GlcNAcylation by chemoenzymatic labeling and mass spectrometry, as well as the quantitative, site-specific pattern by NMR spectroscopy."

Journal • Alzheimer's Disease • CNS Disorders

Local thiamet-G delivery by a thermosensitive hydrogel confers ischemic cardiac repair via myeloid M2-like activation in a STAT6 O-GlcNAcylation-dependent manner. (PubMed, Int Immunopharmacol) - "Of note, both systemic and local supplementation of thiamet-G (TMG), an Oga inhibitor, effectively facilitates cardiac recovery in mice by elevating the accumulation of M2-like macrophages in infarcted hearts. Our study provides a novel clue for monocyte/macrophage modulating therapies aimed at reducing post-MI hyperinflammation in ischemic myocardium."

Journal • Cardiovascular • Inflammation • Myocardial Infarction • OGA • STAT6