JOINT FILING AGREEMENT

Exhibit 1

JOINT FILING AGREEMENT

The undersigned hereby agree that the Statement on Schedule 13G, dated February 15, 2010, with respect to the shares of OncoGenex Pharmaceuticals, Inc.’s Common Stock, par value $0.001 per share, is, and any amendments thereto executed by each of us shall be, filed on behalf of each of us pursuant to and in accordance with the provisions of Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as amended, and that this Agreement shall be included as an Exhibit to the Schedule 13G and each such amendment. Each of the undersigned agrees to be responsible for the timely filing of the Schedule 13G and any amendments thereto, and for the completeness and accuracy of the information concerning itself contained therein. This Agreement may be executed in any number of counterparts, all of which taken together shall constitute one and the same instrument.

IN WITNESS WHEREOF, the undersigned have executed this Agreement as of the 15th day of February, 2010.

	BOXER CAPITAL, LLC
	By:	/s/ Xxxxx Xxxxx
		Name:	Xxxxx Xxxxx
		Title:	Authorized Signatory
	BOXER ASSET MANAGEMENT INC.
	By:	/s/ Xxxxxxxxx X. Xxxx
		Name:	Xxxxxxxxx X. Xxxx
		Title:	Director
	XXXXX XXXXX
	By:	/s/ Xxxxx Xxxxx
		Xxxxx Xxxxx, Individually
	XXXX XXXXXXX
	By:	/s/ Xxxx Xxxxxxx
		Xxxx Xxxxxxx, Individually
	XXXX XXXXXXXXXX
	By:	/s/ Xxxx Xxxxxxxxxx
		Xxxx Xxxxxxxxxx, Individually

	XXXXXXXXXXX XXXXXXXXX
	By:	/s/ Xxxxxxxxxxx Xxxxxxxxx
		Xxxxxxxxxxx Xxxxxxxxx, Individually
	XXXXXX XXXXX
	By:	/s/ Xxxxxx Xxxxx
		Xxxxxx Xxxxx, Individually