| AD | Alzheimer’s disease |
| ADHD | attention deficit hyperactivity disorder |
| AR | activation ratio |
| ASD | autism spectrum disorder |
| ASFMR1 | antisense FMR1 |
| ASOs | antisense oligonucleotides |
| BAP | broad autism phenotype |
| BDNF | brain-derived nerve growth factor |
| BRIEF | The Behavior Rating Inventory of Executive Function Questionnaire |
| CANTAB | Cambridge Automated Neuropsychological Test Battery |
| CBT | cognitive-behavioral therapy |
| CRHR1 | corticotropin releasing hormone type 1 receptor |
| CSF | cerebrospinal fluid |
| DBS | deep brain stimulation |
| DGCR8 | DiGeorge syndrome critical region 8 |
| DM1 | myotonic dystrophy type 1 |
| EBV | Epstein–Barr virus |
| EEG | electroencephalography |
| EGFP | green florescent protein |
| ERP | event-related potentials |
| FDA | Food and Drug Administration Agency |
| FECD | Fuchs endothelial corneal dystrophy |
| FMR1 | fragile X messenger ribonucleoprotein 1 gene |
| fMRI | functional magnetic resonance imaging |
| FMRP | FMR1 protein |
| FRAXI | Fragile X International |
| FXAA | Fragile X Association of Australia |
| FXAND | fragile X-associated neuropsychiatric disorders |
| FXPAC | fragile X-premutation-associated conditions |
| FXPOI | fragile X-associated primary ovarian insufficiency |
| FXR | farnesoid X receptor |
| FXTAS | fragile X-associated tremor/ataxia syndrome |
| HNRNP A2/B1 | heterogeneous nuclear ribonucleoprotein A1 |
| hESC | human embryonic stem cell |
| hPSCs | human pluripotent stem cells |
| ID | intellectual disabilities |
| iPSCs | induced pluripotent stem cells |
| LFB-PAS | luxol fast blue/periodic acid-Schiff stain |
| LXR/RXR | liver X receptor/retinoid X receptor |
| mTOR | the mechanistic target of rapamycin |
| MBNL1 | muscleblind-like protein 1 |
| MCP sign | MRI findings of white-matter disease usually in the middle cerebellar peduncles |
| MDD | major depressive disorder |
| MOCA | Montreal cognitive assessment |
| MRI | magnetic resonance imaging |
| NFXF | National Fragile X Foundation |
| NIID | neuronal intranuclear inclusion disease |
| NZ | New Zealand |
| OPDM | oculopharyngodistal myopathy |
| OPML | oculopharyngeal myopathy with leukoencephalopathy |
| OT | occupational therapy |
| p62/SQSTM1 | p62/sequestosome-1 |
| PBMCs | peripheral blood mononuclear cells |
| PCOS | polycystic ovary syndrome |
| PD | Parkinson’s disease |
| PGD | preimplantation genetic diagnosis |
| PKR | protein kinase R |
| PM | premutation |
| PMDD | premenstrual dysphoric disorder |
| POI | primary ovarian insufficiency |
| PSAT1 | phosphoserine aminotransferase 1 |
| PSCs | pluripotent stem cells |
| PSMB5 | proteasome subunit beta type-5 |
| RAN | repeat-associated non-AUG |
| RBP | RNA-binding proteins |
| RCT | randomized placebo-controlled trial |
| Rm 62 | ATP-dependent RNA helicase p62 |
| RNAi | RNA interference |
| ROS | reactive oxygen species |
| SAM68 | Src-associated substrate during mitosis of 68-kDa |
| SCAD | sudden coronary artery dissection |
| Sk2 | sphingosine kinase |
| SNRIs | serotonin and norepinephrine reuptake inhibitors |
| SSRIs | selective serotonin reuptake inhibitors |
| SOD | superoxide dismutase 1 |
| SUMO | small ubiquitin-like modifier |
| TDP-43 | TAR DNA-binding protein 43 |
| TNC | tenascin-C |
| WES | whole-exome sequencing |
| WGS | whole-genome sequencing |
| WMH | white-matter hyperintensities |