Influenza Antiviral DAS-181-F04 in Healthy Adults

This study will be a double-blind, randomized, placebo-controlled study. The subjects will
receive a single-dose treatment of DAS181-F04 or placebo at a targeted delivered dose of
20mg each day for three days. The subjects will be evaluated on the day before the initial
dose (Day -1) and randomly assigned to DAS181-F04 or placebo in a 2:1 ratio. Subjects will
be evaluated prior to dosing on Days 0, 1 and 2. Additional follow-up evaluations will occur
one day after completion of dosing (Day 3) and on Days 4, 6, 9, 16 (+/-1 day), 32 (+/-3
days) and 90 (+/-10 days). The primary objective is to determine the safety and tolerability
of DAS181-F04 encapsulated dry powder compared to placebo when administered by oral
inhalation using a dry powder inhaler (DPI) in healthy adults. The secondary objective is to
investigate the pharmacokinetic and immunologic profile of DAS181 encapsulated dry powder
dose to dose and compared to placebo when administered by oral inhalation using a DPI in
healthy adults. A total of 9 subjects, healthy male and female subjects, ages 18 to 45 years
will be enrolled. Subjects will be randomized 2:1 ratio, wherein 6 subjects will receive the
active drug and 3 subjects will receive placebo. Subjects may be replaced if a subject
withdraws within 7 days (Day 9) after receipt of the final study drug dose.

Inclusion Criteria:

-Male and female subjects in good health in the opinion of the site Principal Investigator
(PI) or sub-investigator as determined by vital signs, medical history, and a physical
exam. -Subjects must be able to verbalize understanding of the consent form, provide
written informed consent and verbalize willingness to complete study procedures. -Be 18 to
45 years of age (inclusive), at the time of screening. -Subjects must have a Body Mass
Index (BMI) of 17.5-35. Actual lower weight limit may be 50 kg, if BMI is in the range
indicated. -No history of smoking in the past six months, regardless of clinical
relevance. -Electrocardiogram (ECG) with no clinically significant abnormalities recorded
at screening visit: PR interval within 120 and 200ms, QRS interval < 120ms, and confirmed
QTc interval diastolic 50 - 90 mmHg) and heart rate between 45 and 100 beats per minute. -Chest X-ray
shows no clinically significant abnormalities. -Forced expiratory volume in 1 second
(FEV1) will be greater than 80% predicted; note: only one baseline value for FEV1 can be
used to support inclusion criterion. -Negative Human Immunodeficiency Virus (HIV), HBSAg,
and Hepatitis C Virus (HCV) antibody screening tests. -Negative screening tests for:
marijuana, cocaine metabolite, amphetamines, opiates, PCP, barbiturates, benzodiazepines,
and ethanol. -Subjects with the following laboratory criteria within provided range (see
Appendix B): --Hemoglobin --White blood cell (WBC) and platelet count --Alkaline
phosphatase (ALKP), total bilirubin, alanine aminotransferase (ALT), --Serum glucose;
note: if a non-fasting glucose is performed and is abnormal, a fasting glucose measurement
may be obtained in its place; if this is within the provided range, then subject may be
enrolled. --Serum creatinine --Activated partial thromboplastin time (APTT) and fibrinogen
-Urine glucose and blood tested by dipstick urinalysis are negative. Urine protein tested
by dipstick is negative or trace. Menstruating females failing inclusion due to positive
urine dipstick blood may be retested following cessation of menses. -Female subjects must
be post-menopausal (one year or greater without menses), surgically incapable of
childbearing, or agreeable to practicing abstinence or utilizing two effective methods of
birth control during the study period and for 12 weeks after study product administration.
Acceptable methods may include: --Intrauterine device --Spermicide --Barrier contraception
--Hormonal contraception -A female subject must have had a negative serum pregnancy test
during the screening visit and a negative urine pregnancy test within 24 hours of drug
dosing. -If male, agrees to use medically accepted form of contraception from time of
enrollment to 12 weeks after study product administration. -Agrees not to drink alcohol or
participate in strenuous physical activity or exercise from 24 hours prior to Day -1
through the Day 6 follow-up visit.

Exclusion Criteria:

-Have received any investigational drug or vaccine within 30 days prior to study drug
dosing or have had a serious adverse reaction or hypersensitivity to any drug. -Is
planning to participate in another clinical trial within 30 days after the last dose of
DAS181. -Have received blood products within 6 months of study enrollment. -Active drug or
alcohol use or dependence that, in the opinion of the investigator, would interfere with
adherence to study requirements. -Have been on a liquid protein diet in the last month.
-Are allergic to lactose. -Have sickle cell disease. -Have used any prescription or
nonprescription drugs, excluding hormonal contraception, within 7 days prior to admission
unless approved by the site PI or sub-investigator. Subjects must be willing to refrain
from taking non-study medication and herbal supplements during the study through Day 32
except those approved by the site PI or sub-investigator. -Existence of any surgical,
medical or laboratory condition that, in the judgment of the site PI or sub-investigator,
might interfere with the safety, distribution, metabolism, or excretion of the drug.
-Subjects with current or a previous history of respiratory diseases (e.g., asthma,
allergic rhinitis, chronic obstructive pulmonary disease (COPD), cystic fibrosis,
emphysema, or anaphylaxis) requiring acute or chronic medication, as determined by the
investigator through medical history evaluation and physical examination. -Subjects who
have experienced a previous episode of acute upper respiratory tract infection, pneumonia,
otitis, bronchitis, or sinusitis within 2 weeks prior to screening. -Subjects with
concurrent sustained respiratory symptoms (runny nose, sore throat, sneezing, coughing, or
wheezing). -Subjects who have an oral temperature above 37.8 degrees C (100 degrees F).
-Subjects with cancer or history of hematologic malignancy. Cancer is defined as any
active neoplastic disease, excluding noninvasive basal cell carcinoma. -Subjects who have
a planned hospital admission for any cause and/or a planned surgical procedure within 30
days of initiation of the study. -Female subjects who are pregnant or breast-feeding.
-Subjects who have donated or lost more than 500mL of blood in the three months prior to
screening or who plan to donate blood during study participation. -Subjects who have
clinically significant medical or psychological conditions that would compromise the
subject's safety, influence the results of the study, affect the subject's ability to
participate in the study, or impair the subject's ability to provide informed consent.
-Subjects who have a history of drug dependence, or psychiatric illness within 2 years of
study enrollment.