Allopregnanolone Regenerative Therapeutic for Early Alzheimer's Disease: Intramuscular Study

The purpose of this bridging study is to advance the therapeutic development of
Allopregnanolone (Allo) by using the intramuscular (IM) route of administration as an
alternative to the intravenous (IV) route. In order to identify the equivalent IM dose we
will conduct pharmacokinetic (PK) analysis previously informed by simulations and modeling.
We will recruit a total of 12 participants, both males and females equally distributed, into
this single-arm, open-label study.

PK analysis and dose finding will take place for the initial 4 weeks; some participants may
not require all 4 weeks of initial dosing to establish maintenance dose. Once maintenance
dose is established all participants will receive weekly administration of Allo IM until they
complete 12 weeks total of Allo exposure (5 or 6 clinic visits and 6 or 7 home-nurse visits).

Inclusion Criteria:

- Provision of signed and dated informed consent form

- Stated willingness to comply with all study procedures and availability for the
duration of the study

- Men or postmenopausal women, aged 55 years or older

- Diagnosis of MCI due to AD or mild AD

- In good general health as evidenced by medical history and with no medical
contraindications to participation

- MMSE > 20 at screen

- Caregiver willing and capable to accompany the patient to clinic visits

Exclusion Criteria:

- Daily use of benzodiazepines, sedative/hypnotics, anticonvulsants, antipsychotics, and
other drugs that might interact with the GABA-A receptor complex.

- Seizure disorder, history of stroke, focal brain lesion, traumatic brain injury,
substance abuse, malignancy.

- Clinically significant laboratory or ECG abnormality obtained at screening visit.

- MRI indicative of significant abnormality, including but not limited to evidence of a
single prior hemorrhage or infarct >1 cm3, multiple lacunar infarcts (>1) or evidence
of a single prior infarct >1cm3, evidence of a cerebral contusion, encephalomalacia,
aneurysms, vascular malformations, subdural hematoma, or space occupying lesions (e.g.
abscess or tumor).

- Has any contraindications for MRI studies, including claustrophobia, the presence of
metal (ferromagnetic) implants, or a cardiac pacemaker that is not compatible with
MRI.

- Is currently enrolled in a clinical trial involving an off-label use of an
investigational drug or device, or concurrently enrolled in any other type of medical
research or observational study judged not to be scientifically or medically
compatible with this study.