NewLink Genetics Presents Preclinical Data on New IDO Pathway Inhibitor, NLG919, at American Association for Cancer Research 2013 Annual Meeting

AMES, Iowa, April 8, 2013 /PRNewswire/ -- NewLink Genetics Corporation (NASDAQ: NLNK), a biopharmaceutical company primarily focused on discovering, developing and commercializing immunotherapeutic products in oncology, announced today that the company presented preclinical data for NLG919, a potent IDO (indoleamine-(2,3)-dioxygenase) pathway inhibitor, at the American Association for Cancer Research (AACR) 2013 annual meeting. These data demonstrate that NLG919 potently inhibits the IDO pathway in vitro and in cell based assays, is orally bioavailable and has a favorable pharmacologic and toxicity profile. NLG919 is the second pipeline candidate from NewLink's IDO Pathway Inhibitor technology platform to be announced. This platform has also produced indoximod (NLG8189 or D1-MT) which is currently in Phase 2 clinical trials for the treatment of prostate cancer and metastatic breast cancer. Furthermore, NLG919 and indoximod show remarkable synergistic T-cell activation and antitumor activity.

"These data further support our view that IDO is a complex pathway with critical downstream immunomodulatory effects, and strategies that aim at multiple targets within this pathway may hold the most promise," commented Dr. Charles Link, Chairman and Chief Executive Officer of NewLink. "We are encouraged by NLG919's anti-tumor and pharmacological properties and will continue to evaluate it, along with other IDO pathway inhibitors in our preclinical and clinical pipeline, as an innovative approach to harnessing the immune system to treat cancer."

In a poster presentation entitled "NLG919, a novel indoleamine-2,3-dioxygenase (IDO)-pathway inhibitor drug candidate for cancer therapy," NewLink scientists presented preclinical data to demonstrate NLG919's on target anti-tumor effects as well as favorable oral bioavailability, pharmacokinetic and pharmacodynamic profiles.

The principal findings reported in the NLG919 study include:

• NLG919 potently inhibits the IDO pathway in vitro and in cell based assays.
• NLG919 potently blocks IDO-induced antigen-specific T-cell suppression and restores robust T-cell responses.
• NLG919 demonstrates single agent anti-tumor activity.
• NLG919 and indoximod show synergistic T-cell activation and antitumor activities.
• NLG919 is orally bioavailable and has a favorable pharmacokinetic and toxicity profile.

About inhibition of the IDO pathway

IDO pathway inhibitors are another class of immune check point inhibitors akin to the recently developed antibodies targeting CTLA-4 and PD-1 which represent a potential breakthrough approach to cancer therapy. The IDO pathway regulates immune response by suppressing T-cell function and enabling local tumor immune escape. Recent studies have demonstrated that the IDO pathway is active in many cancers, both within tumor cells as a direct defense against T-cell attack, and also within antigen presenting cells in tumor draining lymph nodes whereby this pathway promotes peripheral tolerance to tumor associated antigens (TAAs). When hijacked by developing cancers in this manner, the IDO pathway may facilitate the survival, growth, invasion and metastasis of malignant cells expressing TAAs that might otherwise be recognized and attacked by the immune system. NewLink has a number of active programs directed at synthesizing IDO pathway inhibitors. These small-molecule, anti-tolerogenic product candidates are intended to counteract this key mechanism by which tumors evade immune-mediated destruction.

About NewLink Genetics Corporation

NewLink Genetics Corporation is a biopharmaceutical company focused on discovering, developing and commercializing novel immunotherapeutic products to improve treatment options for cancer patients. NewLink's portfolio includes biologic and small molecule immunotherapy product candidates intended to treat a wide range of oncology indications. NewLink's product candidates are designed to harness multiple components of the immune system to combat cancer without significant incremental toxicity, either as a monotherapy or in combination with other treatment regimens. NewLink's lead product candidate, algenpantucel-L (HyperAcute® Pancreas) is being studied in a Phase 3 clinical trial in surgically resected pancreatic cancer patients (under a Special Protocol Assessment with the U.S. FDA) as well as in a separate study in locally advanced pancreatic cancer patients. NewLink has recently launched an adaptive design Phase 2B/3 clinical trial of tergenpumatucel-L (HyperAcute® Lung) in patients with non-small cell lung cancer. NewLink is developing indoximod, a small molecule, orally bioavailable product candidate from NewLink's proprietary indoleamine-(2,3)-dioxygenase, or IDO, pathway inhibitor technology. NewLink is studying indoximod in various chemotherapy and immunotherapy combination studies independently and in collaboration with the National Cancer Institute. For more information please visit http://www.linkp.com. Patient information is available at http://www.pancreaticcancer-clinicaltrials.com.

Cautionary Note Regarding Forward-Looking Statements

This press release contains forward-looking statements of NewLink that involve substantial risks and uncertainties. All statements, other than statements of historical facts, contained in this press release are forward-looking statements, within the meaning of The Private Securities Litigation Reform Act of 1995. The words "anticipate", "believe", "estimate", "expect", "intend", "may", "plan", "target", "potential", "will", "could", "should", "seek", or the negative of these terms or other similar expressions are intended to identify forward-looking statements, although not all forward-looking statements contain these identifying words. These forward-looking statements include, among others, statements about: the prospects of algenpantucel-L, indoximod and our other HyperAcute product candidates and related clinical trials. Actual results or events could differ materially from the plans, intentions and expectations disclosed in the forward-looking statements that NewLink makes due to a number of important factors, including risks relating to: the initiation of clinical trials and the completion of enrollment; adverse general economic and industry conditions; and those risks discussed in "Risk Factors" and elsewhere in NewLink's Annual Report on Form 10-K for the period ended December 31, 2012, Form S-3 Registration Statement filed December 28, 2012 and in its other filings with the Securities and Exchange Commission. The forward-looking statements in this press release represent NewLink's views as of the date of this press release. NewLink anticipates that subsequent events and developments will cause its views to change. However, while it may elect to update these forward-looking statements at some point in the future, it specifically disclaims any obligation to do so. You should, therefore, not rely on these forward-looking statements as representing NewLink's views as of any date subsequent to the date of this press release.

Contact:
Gordon Link
Chief Financial Officer
515-598-2925
glink@linkp.com

SOURCE NewLink Genetics Corporation