Company: MDCXW
Filing Date: 2025-11-19
Form Type: S-1
Source: 0001062993-25-016962
Chunk: 117

Company: Medicus Pharma Ltd.
Filing Date: 2025-11-19
Form: S-1
Chunk 117
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 GMP conditions were not required for these studies. The manufacturing methods used to make the arrays for the non-clinical studies are identical to the methods used to make the GMP-quality arrays.

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Preclinical PK and Safety Studies

The results of the preclinical studies indicate a reliable lack of systemic exposure when doxorubicin is delivered via MNA. Furthermore, minipig studies using doses of up to 200 µg per MNA showed no detectable levels of doxorubicin, measured by LC-MS/MS. Given these data, no systemic effects are anticipated from D-MNA application.

All preclinical studies of D-MNA were conducted by the University of Pittsburgh at the laboratory of Dr. Louis Falo.

University of Pittsburgh Experience

Doxorubicin delivered by the MNAs described in University of Pittsburgh's IND #122448 showed efficacy in causing local, acute tumor cell death in the mouse melanoma model at doses that would otherwise be considered safe (e.g., 25 µg), but sub-therapeutic if delivered via a systemic route of administration. A typical systemic dose of doxorubicin is 60-75 micrograms/m2 and a typical adult cancer patient is 1.73 m2, resulting in a dose of 104 to 130 milligrams (approximately 4,000 times higher than the 25 µg delivered by the MNA).

MNAs delivering doxorubicin also demonstrated efficacy in a murine squamous cell carcinoma model, with 100% survival in MNA-Doxorubicin group versus 0% survival in MNA-Blank group (Friedman B, et al, 2017). Survival advantage persisted with 40% of MNA-Doxorubicin-treated mice alive at 40 days post-inoculation. As a result, we believe BCC is a rational target for chemo-immunotherapy using D-MNAs.

The University of Pittsburgh research under IND #122448 was conducted on mice in groups ranging in size from six mice to 45 mice using the same D-MNAs that we are developing. These studies were not powered to demonstrate statistical significance.

Pharmacokinetics

Pharmacokinetics and Product Metabolism in Non-Human Animals

As shown by the data and Figure 10 below (courtesy of Louis Falo, M.D., Ph.D.), blood samples were collected from mice intravenously injected with 100 µg or 200