Abbreviations: BPD—Borderline Personality Disorder; HC—Healthy Controls; BDNF—Brain-Derived Neurotrophic Factor; NR3C1—Glucocorticoid Receptor Gene; FKBP5—FK506 Binding Protein 5; DRD2—Dopamine D2 Receptor Gene; HTR3A—Serotonin Receptor 3A; COMT—Catechol-O-Methyltransferase; OPRK1—Opioid Receptor Kappa 1; PRIMA1—Proline-Rich Membrane Anchor 1; PXDN—Peroxidasin; rDNA—Ribosomal DNA. This evidence concerns the gene OPRK1 and Borderline personality disorder.