Therapy Areas: Vaccines
First Subject Dosed with Monoclonal Antibody Encoded by mRNA in a Clinical Trial
6 February 2019 - - The first subject has been dosed in a Phase 1 clinical trial evaluating the safety and tolerability of escalating doses of mRNA-1944 via intravenous infusion in healthy adults, US-based clinical stage biotechnology company Moderna, Inc., (NASDAQ: MRNA) said.

This is the first monoclonal antibody encoded by mRNA to be dosed in a human and the first development candidate from the company's systemic therapeutics modalities to start clinical testing.

mRNA-1944 encodes a fully human IgG antibody originally isolated from B cells of a patient with a prior history of potent immunity against Chikungunya infection.

It is composed of two mRNAs that encode the heavy and light chains of this anti-Chikungunya antibody within Moderna's proprietary lipid nanoparticle technology.

Preclinical studies of mRNA-1944 showed linear dose-dependence, meaning increases in the dose of mRNA led to nearly proportionate increases in antibody production.

The research and development of mRNA-1944 was financially supported by the Defense Advanced Research Projects Agency (DARPA), an agency of the US Department of Defense.

The randomised, placebo-controlled Phase 1 study is designed to evaluate the safety and tolerability of up to four ascending dose levels (0.1, 0.3, 0.6, 1 mg/kg cohorts with 8 subjects per cohort) of mRNA-1944 in healthy adults, administered via intravenous infusion.

Other objectives are to determine pharmacodynamics in the form of serum antibody expression and whether the antibodies produced against the Chikungunya virus are sufficiently active to neutralize viral infection in vitro.

Moderna has 21 mRNA development candidates in its pipeline, with 12 programs now in clinical development. These investigational medicines are grouped together into six modalities based on similar mRNA technologies, delivery technologies and manufacturing processes.

Typically, programs within a modality will also share similar pharmacology profiles, including the desired dose response, the expected dosing regimen, the target tissue for protein expression, safety and tolerability goals as well as their pharmaceutical properties.

Moderna scientists designed the company's systemic secreted therapeutics modality to achieve a therapeutic effect in one or more tissues or cell types by increasing levels of desired secreted proteins outside the cell, either in circulation or in contact with the extracellular environment.

The goal of this modality is to provide secreted proteins, such as antibodies or enzyme replacement therapies across a wide range of diseases, such as infectious diseases and rare genetic diseases.

Three development candidates are currently included in this modality: antibody against Chikungunya virus (mRNA-1944 in a Phase 1 study); Relaxin (AZD7970 in IND-enabling GLP toxicology studies); and Fabry disease (mRNA-3630 in IND-enabling GLP toxicology studies).

The systemic intracellular therapeutics modality uses the same delivery technology and was designed to achieve a therapeutic effect in one or more tissues or cell types by producing proteins encoded by mRNA inside the cell, either located in the cytosol or specific organelles, like the mitochondria.

The goal of this modality is to provide intracellular proteins, such as intracellular enzymes and organelle-specific proteins, as safe, tolerable and efficacious therapies.

Moderna currently has three programs in this modality focused on rare genetic diseases that cannot be addressed using recombinant proteins.

These include methylmalonic academia or MMA (mRNA-3704 with an open IND for a Phase 1/2 study); Propionic Acidemia or PA (mRNA-3927 in IND-enabling GLP toxicology studies); and Phenylketonuria or PKU (mRNA-3283 in IND-enabling GLP toxicology studies).

Chikungunya is a mosquito-borne virus that poses a significant public health problem in tropical and subtropical regions. The disease is characterized by an acute onset of fever, rash, muscle pain, and sometimes debilitating pain in multiple joints.

There are currently no effective therapies or approved vaccines to treat or prevent Chikungunya infection or disease, and effective mosquito control is challenging.

Currently, people infected with Chikungunya are treated with non-steroidal anti-inflammatory drugs to relieve some symptoms.

In addition to a systemic secreted antibody that could provide passive immunity, Moderna is also exploring using mRNA to encode viral antigens as a prophylactic vaccine against the Chikungunya virus (mRNA-1388).

Moderna is advancing messenger RNA science to create a new class of transformative medicines for patients.

mRNA medicines are designed to direct the body's cells to produce intracellular, membrane or secreted proteins that can have a therapeutic or preventive benefit and have the potential to address a broad spectrum of diseases.

The company's platform builds on continuous advances in basic and applied mRNA science, delivery technology and manufacturing, providing the company the capability to pursue in parallel a robust pipeline of new development candidates.

Moderna is developing therapeutics and vaccines for infectious diseases, immuno-oncology, rare diseases and cardiovascular diseases, independently and with strategic collaborators.

Headquartered in Cambridge, Mass., Moderna currently has strategic alliances for development programs with AstraZeneca, Plc. and Merck, Inc., as well as the Defense Advanced Research Projects Agency (DARPA), an agency of the US Department of Defense; the Biomedical Advanced Research and Development Authority (BARDA), a division of the Office of the Assistant secretary for Preparedness and Response within the US Department of Health and Human Services.

Moderna has been ranked in the top ten of Science's list of top biopharma industry employers for the past four years.
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