Arrowhead Pharmaceuticals Files for Regulatory Clearance to Begin Phase 1 Study of ARO-AAT

PASADENA, Calif.–(BUSINESS WIRE)–

Arrowhead Pharmaceuticals Inc. (NASDAQ: ARWR) today announced that it

filed a regulatory submission to begin a first-in-human study of

ARO-AAT, a second-generation investigational medicine for the treatment

of alpha-1 liver disease that leverages Arrowhead’s subcutaneously

administered Targeted RNAi Molecule (TRiMTM) technology.

Pending approval, Arrowhead intends to proceed with AROAAT1001, a Phase

1 single and multiple ascending dose study to evaluate the safety,

tolerability, pharmacokinetics, and effect of ARO-AAT on serum alpha-1

antitrypsin levels in healthy adult volunteers.

Chris Anzalone, Ph.D., president and CEO of Arrowhead Pharmaceuticals,

said: “ARO-AAT is our second candidate targeting alpha-1 liver disease

and represents the first of five planned regulatory submissions over the

next twelve months for product candidates built on our TRiMTM

platform. We have moved very rapidly with this program and are thrilled

to now submit the regulatory filing ahead of schedule.”

The application for approval of the clinical trial was submitted to the

New Zealand Medicines and Medical Devices Safety Authority (MEDSAFE) for

review by the Standing Committee on Therapeutic Trials (SCOTT) as well

as the local Ethics Committee.

About Arrowhead Pharmaceuticals

Arrowhead Pharmaceuticals develops medicines that treat intractable

diseases by silencing the genes that cause them. Using a broad portfolio

of RNA chemistries and efficient modes of delivery, Arrowhead therapies

trigger the RNA interference mechanism to induce rapid, deep, and

durable knockdown of target genes. RNA interference, or RNAi, is a

mechanism present in living cells that inhibits the expression of a

specific gene, thereby affecting the production of a specific protein.

Arrowhead’s RNAi-based therapeutics leverage this natural pathway of

gene silencing.

For more information, please visit www.arrowheadpharma.com,

or follow us on Twitter @ArrowheadPharma.

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Safe Harbor Statement under the Private Securities Litigation Reform

Act:

This news release contains forward-looking statements within the

meaning of the “safe harbor” provisions of the Private Securities

Litigation Reform Act of 1995. These statements are based upon our

current expectations and speak only as of the date hereof. Our actual

results may differ materially and adversely from those expressed in any

forward-looking statements as a result of various factors and

uncertainties, including the safety and efficacy of our product

candidates, the duration and impact of regulatory delays in our clinical

programs, our ability to finance our operations, the future success of

our scientific studies, our ability to successfully develop drug

candidates, the timing for starting and completing clinical trials,

rapid technological change in our markets, and the enforcement of our

intellectual property rights. Our most recent Annual Report on Form 10-K

and subsequent Quarterly Reports on Form 10-Q discuss some of the

important risk factors that may affect our business, results of

operations and financial condition. We assume no obligation to update or

revise forward-looking statements to reflect new events or circumstances.

Source: Arrowhead Pharmaceuticals, Inc.

Arrowhead Pharmaceuticals, Inc.
Vince Anzalone, CFA
626-304-3400
ir@arrowheadpharma.com
or
Investors

and Media:
LifeSci Advisors, LLC
Brian Ritchie
212-915-2578
britchie@lifesciadvisors.com
www.lifesciadvisors.com

Source: Arrowhead Pharmaceuticals Inc.

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