The goal of this First in Human Phase 1 clinical trial is to to assess the safety,tolerability, and systemic exposure of single, twice daily (BID) doses and repeated BIDdoses of ascending dosing by intranasal administration of Apo-Si-K170AC76 in healthyadult subjects. The primary objective is to evaluate the safety and tolerability ofsingle, BID, and repeated BID, ascending dosing of Apo-Si-K170A-C76 administeredintranasally (IN) in healthy adult subjects.The secondary objective is to evaluate the systemic exposure to Apo-Si-K170A-C76following intranasal administration in healthy adult subjects under the aforementionedadministration regimens. Researchers will compare the active drug Apo-Si-K170A-C76 toplacebo control.
Upon signing the informed consent, the subjects underwent a screening period for
eligibility evaluation. Subjects were admitted to the Research Unit on Day 1 and
eligibility was confirmed again. Eligible subjects, as determined by the Principal
Investigator (PI), were randomized as close as possible prior to1st drug administration
on Day 1, to receive either intranasal Apo-Si-K170A-C76 or matching placebo. Dosing
depended on the cohort the subjects were assigned to.
Intranasal (IN) administration was performed to both nostrils of all participants.
The nasal spray device contains the Study Drug at 20 mg/mL and delivers 0.1 mL volume per
actuation. The subjects received 1-3 actuations per nostril alternately, according to
dosing group. Thus, during each administration cohort, dosages registered as dose/nostril
are received twice per subject, one dose to each nostril.
The study was composed of 7 dosing cohorts. Administration in cohorts 1-5 took place on
Day 1. Administration to cohorts 6-7 took place from Day 1 to Day 5. The study drug (or
placebo) was administered to both nostrils via intranasal spray, while the subject is
seated. All subjects arrived at the clinic for a follow up visit 7±2 days after last day
of administration.
Cohort 1 involved an initial administration of a single (low) dose of Apo-Si-K170A-C76
(2mg/100μl/nostril, to both nostrils). Cohort 2 involved administration of a single dose
of Apo- Si-K170A-C76 at a double dose of the first dose (4mg/200μl/nostril, to both
nostrils). Cohort 3 involved administration of a single dose of Apo-Si-K170AC76 at the
target dose (x3 of first dose, 6mg/300μl/nostril, to both nostrils).
Cohort 4 involved BID administration of the same dose as cohort 2, and cohort 5 involved
BID administration of the same dose as cohort 3. All BID dosing was separated by 6 hours.
Cohort 6 involved administration of repeated BID doses of Apo-Si-K170A (at the same dose
level or lower than that administered in Cohort 4) taken from Day 1 to Day 5. Cohort 7,
which aims to reach target dose, involved administration of repeated BID doses of
Apo-Si-K170A-C76 (at the same dose level or lower than that administered in Cohort 5)
taken also from Day 1 to Day 5.
Drug: Apo-Si-K170A-C76
Apo-Si-K170A-C76 is an small interfering RNA (siRNA) against SARS-CoV-2
Other Name: c76
Drug: Placebo
5% glucose, 0.5% benzyl alcohol in RNase free water
Other Name: pcb
Inclusion Criteria:
- Male and female participants must be ≥ 18 years old.
- Understands the study procedures described in the Informed Consent Form (ICF), be
willing and able to comply with the protocol, and provides written consent.
- Not pregnant or lactating and willing to comply with the contraceptive requirements
from enrolment to 3 months post last dose. Contraceptive requirements include the
following:
- Use a condom with a spermicide to prevent pregnancy in a female partner or to
prevent exposure of any partner (male and female) to the study intervention
treatment.
- Male sterilization with the appropriate post vasectomy documentation of the absence
of sperm in the ejaculate (please note that the use of condom with spermicide will
still be required to prevent partner exposure). This applies only to males
participating in the study.
- In addition, for female partners and female participants of childbearing potential,
must use another form of contraceptive such as one of the highly effective methods
(pills, Intra Uterine Device (IUD)).
- True abstinence - sexual abstinence is considered as a highly effective method only
if defined as refraining from heterosexual intercourse during the entire period of
risk associated with the study treatments.
The reliability of sexual abstinence needs to be evaluated in relation to the duration of
the clinical trial and the preferred and usual lifestyle of the subject.
- In addition to the contraceptive requirements above, male subjects must agree not to
donate sperm for 3 months post last dose of treatment.
- Subject is in good health with no history of clinically significant medical
conditions (as described in Exclusion criteria) that would interfere with subject
safety, as defined by relevant medical history, physical examination and routine
laboratory tests, and ECG, and as determined by the investigator at an admission
evaluation.
- Subjects will have documented relevant medical history prior to entering the study
and/or following relevant medical history review with the study physician at
screening.
Exclusion Criteria:
- History or evidence of any clinically significant or currently active
cardiovascular, (including thromboembolic events), respiratory, dermatological,
gastrointestinal, endocrine, hematological, hepatic, immunological, rheumatological,
metabolic, urological, renal, neurological, or psychiatric illness. Specifically:
- Subjects with any history of physician diagnosed and/or objective test-confirmed
asthma, chronic obstructive pulmonary disease, pulmonary hypertension, reactive
airway disease, or chronic lung condition of any etiology or who have experienced:
- Significant/severe wheeze in the past
- Respiratory symptoms including wheeze which have ever resulted in
hospitalization.
- Known bronchial hyper-reactivity to viruses.
- History of thromboembolic, cardiovascular, or cerebrovascular disease
- History or evidence of diabetes mellitus
- Any concurrent serious illness, including history of malignancy that could interfere
with the aims of the study or a subject completing the study. Basal cell carcinoma
within 5 years of treatment or with evidence of recurrence is also an exclusion.
- Migraine with associated neurological symptoms such as hemiplegia or vision loss.
Cluster headache/migraine or prophylactic treatment for migraine.
- History or evidence of autoimmune disease or known immunodeficiency of any cause.
- Other major diseases that, in the opinion of the investigator, could interfere with
a subject completing the study and necessary investigations.
- Immunosuppression of any type.
- Any significant abnormality altering the anatomy or function of the nose or
nasopharynx in a substantial way (including loss of or alterations in smell or
taste), a clinically significant history of epistaxis (large nosebleeds) within the
last 3 months, nasal or sinus surgery within 6 months pre-screening.
- Clinically active rhinitis (including hay fever) or history of moderate to severe
rhinitis, or history of seasonal allergic rhinitis likely to be active at the time
of inclusion into the study and/or requiring regular nasal corticosteroids on at
least a weekly basis, within 30 days prior to screening.
- History of anaphylaxis and/or a history of severe allergic reaction or significant
intolerance to any food or drug, as assessed by the PI.
- History or presence of alcohol addiction, or excessive use of alcohol. The subject
has a history of consuming more than 7 units of alcoholic beverages per week for
male subjects and more than 5 units for females (Note: one unit = 330 mL of beer,
110 mL of wine, or 28 mL of spirits), or has a history of alcoholism or
drug/chemical/substance abuse within the past 2 years prior to screening.
- Psychiatric illness, including subjects with a history of depression and/or anxiety
with associated severe psychiatric comorbidities, for example psychosis.
Specifically, (a) Subjects with history of anxiety-related symptoms of any severity
within the last 2 years if the Generalized Anxiety Disorder-7 score is ≥4; (b)
Subjects with a history of depression of any severity within the last 2 years if the
Patient Health Questionnaire- 9 score is ≥4
- Subjects who have smoked ≥5 pack years at any time [5 pack years is equivalent to
one pack of 20 cigarettes a day for 5 years]). For subjects who have smoked <5 pack
years at any time, in the 3 months prior to screening, exclusion will apply if they
have used tobacco in any form (e.g. smoking or chewing) or other nicotine-containing
products in any form (e.g., gum, patch) or electronic cigarettes.
- A Body Mass Index (BMI) ≤18 Kg/m2 and ≥28 Kg/m2. The upper limit of BMI may be
increased up to 30 Kg/m2 at the PI's discretion, in the case of physically fit
muscular individual.
- Venous access deemed inadequate for the phlebotomy and cannulation demands of the
study.
- At the discretion of the PI, any clinically significant abnormal finding on
screening biochemistry, hematology, serology , microbiology blood tests or
urinalysis or
- Positive HIV, active/chronic hepatitis B or C test.
- Positive human chorionic gonadotropin (β-HCG) or positive alcohol test
- Confirmed positive test for drugs of abuse and/or urinary cotinine at screening and
on admission (Day 1).
- Twelve-lead ECG recording with clinically relevant abnormalities as judged by the
study physician/PI.
- Presence of cold-like symptoms and/or fever (defined as subject presenting with a
temperature reading of >37.9ºC) at screening or on admission (Day 1).
- Receipt of blood or blood products, or loss (including blood donations) of 550 mL or
more of blood during the 3 months prior to screening.
Exclusion Criteria regarding Medications:
- Use of any medication or product (prescription or over-the-counter) for symptoms of
hay fever, nasal congestion or respiratory tract infections, or dermatitis/eczema
including the use of regular nasal or medium-high potency dermal corticosteroids,
antibiotics and First Defence™ (or generic equivalents) within 7 days prior to
screening. The sporadic use of paracetamol or other medications will be acceptable
only as agreed by the PI.
- Receipt of any investigational drug within 3 months prior to screening.
- Receipt of three or more investigational drugs within the previous 12 months prior
to screening.
- Receipt of systemic (intravenous and/or oral) glucocorticoids or systemic antiviral
drugs within 6 months prior to screening.
- Over-the-counter medications (e.g., paracetamol or ibuprofen) where the dose taken
over the preceding 7 days prior to screening had exceeded the maximum permissible
24-hour dose (e.g., >4g per day of paracetamol over the preceding week).
- Chronically used medications, including any medication known to be a moderate/potent
inducer or inhibitor of cytochrome P450 enzymes, within 21 days prior to screening.
- Subjects who have received any systemic chemotherapy agent, immunoglobulins, or
other cytotoxic or immunosuppressive drugs at any time.
General Exclusion Criteria:
- Subjects who are currently employed by or are first-degree relative of someone
employed by the Sponsor or participating clinical trial site, or any Contract
Research Organization involved in this study.
- Any other reason that the Investigator.
HCRC Ein Karem
Jerusalem, Israel