A First in Human Study of ORT247 in Healthy Volunteers

Inclusion Criteria: * Subject voluntarily consents to participate in this study and provides written informed consent before the start of any study-specific procedures * Male and females, 18 to 65 years of age at time of screening 1. Female subjects of childbearing potential must not be breastfeeding and must have no plans to become pregnant during the course of the study through 120 days after infusion of study drug. Female subjects of childbearing potential who are heterosexual must agree to use a method of contraception considered to be highly effective (i.e., results in \<1% failure rate when used consistently and correctly) from screening through 120 days after the last dose of study drug 2. Female subjects of non-childbearing potential must have evidence from their medical history indicating that they are not of childbearing potential and must not currently be breastfeeding. * Any non-vasectomized male subjects must have agreed to use barrier contraceptives plus spermicide for 200 days after dosing. * Male subjects must agree not to donate sperm for 200 days after dosing * Female subjects must agree not to preserve eggs (ova) for 120 days after dosing * Has not participated in a clinical drug study within 30 days of study start, or within 5 half-lives, unless study blind has been broken and the subject was known to be on placebo * Body mass index of 18-32 Exclusion Criteria: * Contraindication to undergo LP including international normalized ratio (INR) \>1.4 or other coagulopathy, platelet cell count of \<120,000/μL, infection at the desired LP site, current use of anti-coagulant medication except for low dose aspirin, degenerative arthritis, spinal scoliosis, back surgery, suspected increased intracranial pressure on history or neurologic exam, non-communicating hydrocephalus or intracranial mass, or prior history of spinal mass or trauma * Any significant acute or chronic medical illness * Any history of cancer within 5 years of enrollment with the exception of resected skin basal cell carcinoma * Any major surgery within 4 weeks of study drug administration * Donation of blood or serum \>500 mL to a blood bank or in a clinical study (except screening visit) within 3 months of study drug administration * Inability to undergo venipuncture or tolerate venous access * Has smoked or used tobacco products within 3 months before study drug administration * Positive drug screen for alcohol, drugs of abuse, or tobacco * Recent (within 6 months of study drug administration) drug or alcohol abuse as defined in Diagnostic and Statistical Manual of Mental Disorders, 5th edition (DSM-V), Diagnostic Criteria for Drug and Alcohol Abuse * Evidence of any clinically significant neurological or psychiatric disorder that could interfere with study assessments as determined by investigator and sponsor * History of or currently has schizophrenia, schizoaffective disorder or bipolar disorder, untreated major depression (DSM-V or International Statistical Classification of Diseases and Related Health Problems, 10th edition \[ICD-10\] criteria) * Significant illness or infection requiring intervention within the prior 30 days as determined by investigator and sponsor (must test negative for active coronavirus disease 2019 \[COVID-19\]) * Indication of potential suicidality risk * Any of the following abnormalities at screening: serum creatinine \> upper limit of normal (ULN), hepatic transaminases (aspartate aminotransferase or alanine aminotransferase) \> ULN, abnormal blood pressure based on the clinical judgment of the investigator, QTcF \>470 msec * Known history of hypersensitivity to any component of the ORT247 drug product or placebo * Currently taking, or planning to take, any medication (prescription or over-the-counter) that would potentially affect the assessment of pharmacokinetics (PK), pharmacodynamics (PD), or immunogenicity of ORT247.