Pharmacokinetic Study of a Single Dose of AVI-4126 (RESTEN-NG®) in Cerebral Spinal Fluid

Inclusion Criteria:

* Adult males 18 years to 64 years of age;
* Good general health (as evidenced by no chronic conditions, normal physical exam, vital signs within normal limits; laboratory evaluations within normal range)
* Signed and dated written informed consent form; and
* Willing to participate in all study activities and all requirements, including effective contraception (viz., a double-barrier method) during the 7-day study surveillance period.

Exclusion Criteria:

* Hematology, serum chemistry (exclusive of electrolytes), and urinalysis laboratory test values \>2 times upper limits of normal or anemia (hemoglobulin \<11 g/dL), leukopenia (total white blood count \<3,000/µL or total neutrophils \<1,500/ µL) or thrombocytopenia (platelets \<100,000/µL). Electrolytes and coagulation values exceeding normal ranges are to be excluded.
* Body Mass Index (BMI) \>35.
* Calculated creatinine clearance (by the Cockroft and Gault Formula) \<70 mL/min, based on age and gender.
* Positive HIV-1 or HIV-2 serology.
* Positive HCV serology and/or positive plasma HCV-RNA status.
* Positive HBsAg or HBcAb status.
* Solid or hematopoetic organ transplant recipient.
* Active illness or recent illness within 30 days of the first dose of study drug.
* History of any of the following: brain injury, neoplasm, chronic or migraine headaches, cancer, meningitis or hydrocephalus.
* Usage of any prescribed, over-the-counter or illicit drug(s) within 30 days of study drug administration. Use of herbal remedies and/or supplements at the discretion of the Investigator.
* Unwilling to practice effective contraception during the study period.
* Participation in any clinical interventional trial within the previous 6 months.
* Positive drug urine screen.