ARROWHEAD PHARMACEUTICALS, INC. - FORM 10-K - EX-23.1 - CONSENT OF INDEPENDENT PUBLIC REGISTERED ACCOUNTING FIRM - December 22, 2009

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10-K - FORM 10-K - ARROWHEAD PHARMACEUTICALS, INC.d10k.htm
EX-4.7 - FORM OF WARRANT TO PURCHASE CAPITAL STOCK - ARROWHEAD PHARMACEUTICALS, INC.dex47.htm
EX-4.2 - FORM OF REGISTRATION RIGHTS AGREEMENT - ARROWHEAD PHARMACEUTICALS, INC.dex42.htm
EX-3.4 - CERTIFICATE OF AMENDMENT TO CERTIFICATE OF INCORPORATION - ARROWHEAD PHARMACEUTICALS, INC.dex34.htm
EX-21.1 - LIST OF SUBSIDIARIES - ARROWHEAD PHARMACEUTICALS, INC.dex211.htm
EX-32.1 - SECTION 906 CERTIFICATION OF CHIEF EXECUTIVE OFFICER - ARROWHEAD PHARMACEUTICALS, INC.dex321.htm
EX-10.8 - AMENDMENT TO EMPLOYMENT AGREEMENT - ARROWHEAD PHARMACEUTICALS, INC.dex108.htm
EX-31.1 - SECTION 302 CERTIFICATION OF CHIEF EXECUTIVE OFFICER - ARROWHEAD PHARMACEUTICALS, INC.dex311.htm
EX-31.2 - SECTION 302 CERTIFICATION OF CHIEF FINANCIAL OFFICER - ARROWHEAD PHARMACEUTICALS, INC.dex312.htm
EX-10.6 - AMENDMENT TO SEVERANCE AGREEMENT - ARROWHEAD PHARMACEUTICALS, INC.dex106.htm
EX-32.2 - SECTION 906 CERTIFICATION OF CHIEF FINANCIAL OFFICER - ARROWHEAD PHARMACEUTICALS, INC.dex322.htm
EX-10.22 - FORM OF SUBSCRIPTION AGREEMENT, DATED AS OF SEPTEMBER 30, 2009 - ARROWHEAD PHARMACEUTICALS, INC.dex1022.htm
EX-10.23 - SECOND AMENDED AND RESTATED INVESTOR RIGHTS AGREEMENT - ARROWHEAD PHARMACEUTICALS, INC.dex1023.htm
EX-10.24 - FORM OF SUBSCRIPTION AGREEMENT DATED DECEMBER 11, 2009 - ARROWHEAD PHARMACEUTICALS, INC.dex1024.htm

Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in this Annual Report on Form 10-K of Arrowhead Research Corporation for the year ended September 30, 2009 of our report dated December 21, 2009 included in its Registration Statements on Form S-1 (No. 333-161344), Forms S-3 (Nos. 333-113065, 333-124065, 333-132310, 333-137329, 333-144109, and 333-148218), and Forms S-8 (Nos. 333-136225, 333-124066, and 333-120072) relating to the consolidated financial statements of Arrowhead Research Corporation and Subsidiaries for the year ended September 30, 2009.

Rose, Snyder & Jacobs

A Corporation of Certified Public Accountants

Encino, California

December 21, 2009

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