ChemoCentryx Announces Presentation During National Kidney Foundation 2018 Spring Clinical Meeting

MOUNTAIN VIEW, Calif., April 11, 2018 -- ChemoCentryx, Inc., (Nasdaq:CCXI), today announced the presentation of positive safety, efficacy and quality of life results from the Company’s successfully completed Phase II CLEAR and CLASSIC clinical trials of avacopan in the treatment of anti-neutrophil cytoplasmic auto-antibody-associated vasculitis (ANCA Vasculitis). The findings are being presented during the 2018 Spring Clinical Meetings of the National Kidney Foundation (NKF), being held April 10-14, 2018 in Austin, Texas.

Presentation Information:

Abstract Title: C5aR Inhibitor Avacopan in Anti-Neutrophil Cytoplasmic Autoantibody (ANCA) Vasculitis: Phase II Outcomes of Safety, Renal Parameters, and Quality of Life

Abstract Number: 266

Authors: T. Schall, A. Potarca, J. Hillson, P. Bekker (for CLEAR and CLASSIC Study Teams) ChemoCentryx, Mountain View, CA

Poster Presentation Date & Time: Wednesday, April 11, at 6pm CT to Friday, April 13, at 10am CT

Location: Austin Convention Center, Austin, TX

About Avacopan

Avacopan is an orally-administered small molecule that is a selective inhibitor of the terminal effector and neutrophil chemoattractant complement C5a receptor, or C5aR. It allows tempering of ANCA responses and thereby to prevent both complement C5a activation while leaving other host defense mechanisms (such as the membrane attack complex, being distinct from C5b) of the immune system unaffected. Avacopan is in phase III development for the treatment of anti-neutrophil cytoplasmic auto-antibody-associated vasculitis (ANCA vasculitis). In clinical studies to date, avacopan was shown to be safe, well tolerated and provided effective control of the disease while successfully allowing elimination of high-dose steroids, part of the standard of care for patients with ANCA vasculitis. Avacopan is also being developed in patients with C3 glomerulopathy (C3G), hidradenitis suppurativa (HS) and in atypical hemolytic uremic syndrome (aHUS). In C3G, avacopan targets the C5a receptor, blocking the effects of C5a which contributes to the inflammatory hypercellularity in the glomeruli, a main feature of C3G. The U.S. Food and Drug Administration has granted avacopan orphan-drug designation for ANCA vasculitis, C3G, and aHUS. The European Commission has granted orphan medicinal product designation for avacopan for the treatment of two forms of ANCA vasculitis: microscopic polyangiitis and granulomatosis with polyangiitis (formerly known as Wegener's granulomatosis), as well as for C3G. Avacopan was also granted access to the European Medicines Agency's (EMA) PRIority MEdicines (PRIME) initiative, which supports accelerated assessment of investigational therapies addressing unmet medical need.

About ChemoCentryx

ChemoCentryx is a biopharmaceutical company developing new medications targeted at inflammatory and autoimmune diseases and cancer. ChemoCentryx targets the chemokine and chemoattractant systems to discover, develop and commercialize orally-administered therapies. ChemoCentryx is currently focusing on its late stage drug candidates for patients with rare kidney diseases, avacopan (CCX168) and CCX140.

Avacopan is an orally-administered small molecule that is a selective inhibitor of the complement C5a receptor, or C5aR. Avacopan is in Phase III development for the treatment of anti-neutrophil cytoplasmic auto-antibody-associated vasculitis (ANCA Vasculitis). In clinical studies to date, avacopan was shown to be safe, well tolerated and provided effective control of the disease while allowing elimination of high-dose steroids, part of the current standard of care. Avacopan is also being developed in patients with C3 glomerulopathy (C3G), hidradenitis suppurativa (HS) and atypical hemolytic uremic syndrome (aHUS).

The Company's other late stage drug candidate is CCX140, an inhibitor of the chemokine receptor known as CCR2, which is currently being developed for patients with focal segmental glomerulosclerosis (FSGS), a debilitating kidney disease.

ChemoCentryx's Kidney Health Alliance with Vifor Pharma provides Vifor Pharma with exclusive rights to commercialize avacopan and CCX140 in markets outside of the U.S. and China.

ChemoCentryx also has early stage drug candidates that target chemoattractant receptors in other Inflammatory and autoimmune diseases and in cancer.

Forward-Looking Statements

ChemoCentryx cautions that statements included in this press release that are not a description of historical facts are forward-looking statements. Words such as "may," "could," "will," "would," "should," "expect," "plan," "anticipate," "believe," "estimate," "intend," "predict," "seek," "contemplate," "potential," "continue" or "project" or the negative of these terms or other comparable terminology are intended to identify forward-looking statements. These statements include the Company's statements whether avacopan (CCX168) will be shown to be safe and effective in the treatment of ANCA vasculitis and other rare diseases. The inclusion of forward-looking statements should not be regarded as a representation by ChemoCentryx that any of its plans will be achieved. Actual results may differ from those set forth in this release due to the risks and uncertainties inherent in the ChemoCentryx business and other risks described in the Company's filings with the Securities and Exchange Commission ("SEC"). Investors are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date hereof, and ChemoCentryx undertakes no obligation to revise or update this news release to reflect events or circumstances after the date hereof. Further information regarding these and other risks is included under the heading "Risk Factors" in ChemoCentryx's periodic reports filed with the SEC, including ChemoCentryx's Annual Report on Form 10-K filed with the SEC on March 12, 2018 and its other reports which are available from the SEC's website (www.sec.gov) and on ChemoCentryx's website (www.chemocentryx.com) under the heading "Investors." All forward-looking statements are qualified in their entirety by this cautionary statement. This caution is made under the safe harbor provisions of Section 21E of the Private Securities Litigation Reform Act of 1995.

Source: ChemoCentryx, Inc.

CCXI-G

Contacts:

Susan M. Kanaya                                                         
Executive Vice President, Chief Financial and Administrative Officer                                        
[email protected]                                          

Media:
Stephanie Tomei
408.234.1279
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Investors:
Burns McClellan, Inc.
Steve Klass
212.213.0006               
[email protected]