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Aeglea BioTherapeutics Reports Second Quarter 2020 Financial Results and Corporate Highlights

Pegzilarginase Showed Durable Clinical Response and Sustained Reduction in Plasma Arginine at 56 Week Analysis of Phase 1/2 Open-Label Extension Study

Initiated Phase 1/2 Clinical Trial of ACN00177 for the Treatment of Homocystinuria

AUSTIN, Texas, Aug. 10, 2020 (GLOBE NEWSWIRE) -- Aeglea BioTherapeutics, Inc. (NASDAQ:AGLE), a clinical-stage biotechnology company developing a new generation of human enzyme therapeutics as innovative solutions for rare and other high-burden diseases, today reported its second quarter 2020 financial results, and provided recent corporate and program highlights.

“Despite the operating challenges posed by the global pandemic, we continued to advance our pegzilarginase program in the first half of the year. The presentation of long-term data showing sustained lowering of arginine levels and durable clinical response with pegzilarginase treatment, as well as progress in our patient identification efforts, reinforce our belief in its potential as a life-changing therapy for those with Arginase 1 Deficiency and lay a strong foundation for the commercial launch of pegzilarginase,” said Anthony Quinn, M.B Ch.B, Ph.D., president and chief executive officer of Aeglea. “Additionally, we initiated our Phase 1/2 clinical trial of ACN00177 for Homocystinuria in the second quarter. We are continuing our patient identification activities and look forward to dosing the first patient once the clinical sites are able to begin screening patients.”

Recent Highlights and Updates

Pegzilarginase in Arginase 1 Deficiency

  • In May, Aeglea presented results from its 56 week analysis from the Company’s completed Phase 1/2 clinical trial and ongoing open-label extension study during a late-breaking oral presentation at the 6th Congress of the European Academy of Neurology. Key results include:
    • Treatment with pegzilarginase resulted in a significant reduction in plasma arginine from baseline with all 13 patients achieving plasma arginine levels within the target range (<200 µM).
    • 85% (11 of 13) of patients were clinical responders based on mobility improvements evaluated using three assessments: 6MWT (6 Minute Walk Test), GMFM (Gross Motor Function) Part D (standing) and Part E (walking, running, and jumping).
    • Pegzilarginase was shown to have a favorable safety profile with more than 750 doses administered.
  • To date, Aeglea has identified more than 240 Arginase 1 Deficiency patients. The number of identified patients represents more than 50% and 30% of the estimated genetic prevalence patient population in the U.S. and key European markets (France, Germany, Spain, Italy and the United Kingdom), respectively.

ACN00177 in Homocystinuria

  • Aeglea initiated its Phase 1/2 clinical trial for ACN00177, a novel engineered human enzyme therapy designed to treat Homocystinuria, a serious metabolic disorder characterized by elevated plasma homocysteine which leads to a wide range of life-altering complications and reduced life expectancy.


  • Eric Bradford, M.D., M.Sc., M.B.A. has been promoted to Chief Development Officer. Dr. Bradford will oversee the clinical programs for pegzilarginase and ACN00177 as well as shape the clinical development strategy for future programs from the Company’s platform of novel human enzymes.
  • Chief Medical Officer Ravi M. Rao, M.B BChir, Ph.D., will depart the company to pursue other opportunities. Dr. Rao will continue to support Aeglea in a medical advisor role through a transitional period.

“Ravi has been a valued and impactful member of the Aeglea team. While we are disappointed by his planned departure, we wish him the best as he returns to his roots in immunology research and development,” said Dr. Quinn. “I look forward to working more closely with Eric as we continue to strengthen our capabilities and advance pegzilarginase towards potential approval and launch.”

Upcoming Events
Aeglea will be attending the following virtual investor conferences in the coming quarter.

  • Wells Fargo Securities Healthcare Conference, September 9-10
  • H.C. Wainwright Healthcare Conference, September 13-15
  • Cantor Fitzgerald Global Healthcare Conference, September 15-17

Further, Aeglea’s leadership looks forward to participating in dialogue about the Company’s enzyme therapeutics platform during the following industry events, with additional details to be announced.

  • World Orphan Drug Congress USA 2020, August 24-26
  • Child Neurology Society Annual Meeting-International Child Neurology Congress 2020, October 19-23

Second Quarter 2020 Financial Results

As of June 30, 2020, Aeglea had available cash, cash equivalents, marketable securities and restricted cash of $159.2 million. Based on Aeglea’s current operating plans, management believes it has sufficient capital resources to fund anticipated operations through 2022.

Research and development expenses totaled $16.9 million for the second quarter of 2020 and $14.8 million for the second quarter of 2019. The increase was primarily associated with investing in manufacturing and pre-commercial activities for Aeglea’s lead product candidate, pegzilarginase; ramp-up in manufacturing activities for ACN00177 in Homocystinuria; and personnel-related expenses offset by decreasing clinical development expenses as a result of completing a Phase 1/2 clinical trial in patients with Arginase 1 Deficiency and closing out cancer trials. 

General and administrative expenses totaled $4.7 million for the second quarter of 2020 and $3.8 million for the second quarter of 2019. This increase was primarily due to additional employee headcount, ramping up commercial capabilities, and additional facilities to support company growth.

Net loss totaled $21.4 million and $18.0 million for the second quarter of 2020 and 2019, respectively, with non-cash stock compensation expense of $1.6 million and $1.2 million for the second quarter of 2020 and 2019, respectively.

About Pegzilarginase in Arginase 1 Deficiency

Pegzilarginase is an enhanced human arginase that enzymatically lowers levels of the amino acid arginine. Aeglea is developing pegzilarginase for the treatment of patients with Arginase 1 Deficiency (ARG1-D), a rare debilitating, progressive disease presenting in childhood with persistent hyperargininemia, spasticity, developmental delay, intellectual disability, seizures and early mortality. Pegzilarginase is intended for use as an enzyme therapy to reduce elevated blood arginine levels in patients with ARG1-D. Aeglea’s Phase 1/2 and Phase 2 open-label extension data for pegzilarginase in patients with ARG1-D demonstrated clinical improvements and sustained lowering of plasma arginine. The Company’s single, global pivotal Phase 3 PEACE trial is designed to assess the effects of treatment with pegzilarginase versus placebo over 24 weeks with a primary endpoint of plasma arginine reduction.

About ACN00177 in Homocystinuria

Aeglea is developing ACN00177 for the treatment of patients with cystathionine beta synthase (CBS) deficiency, also known as Classical Homocystinuria. Homocysteine accumulation plays a key role in multiple progressive and serious disease-related complications, including thromboembolic vascular events, skeletal abnormalities including severe osteoporosis, developmental delay, intellectual disability, lens dislocation and severe near-sightedness. ACN00177 has been designed as a novel recombinant human enzyme, which degrades the amino acid homocysteine and its related homocystine dimer. With this mechanism, ACN00177 is intended to lower the abnormally high blood levels of homocysteine in patients with Homocystinuria. Preclinical data demonstrated that ACN00177 improved important disease-related abnormalities and survival in a mouse model of Homocystinuria. The Company initiated a Phase 1/2 trial in the second quarter of 2020 and continues patient identification and administrative activities. The timing of first patient dosing in this Phase 1/2 trial will depend on determinations by individual sites as they adjust to impacts from COVID-19.

About Aeglea BioTherapeutics

Aeglea BioTherapeutics is a clinical-stage biotechnology company redefining the potential of human enzyme therapeutics to benefit people with rare and other high burden diseases. Aeglea's lead product candidate, pegzilarginase, is in a pivotal Phase 3 trial for the treatment of Arginase 1 Deficiency and has received both Rare Pediatric Disease and Breakthrough Therapy Designation. The Company initiated a Phase 1/2 clinical trial of ACN00177 for the treatment of Homocystinuria in the second quarter of 2020. Aeglea has an active discovery platform, with the most advanced program for Cystinuria. For more information, please visit

Safe Harbor / Forward Looking Statements

This press release contains "forward-looking" statements within the meaning of the safe harbor provisions of the U.S. Private Securities Litigation Reform Act of 1995. Forward-looking statements can be identified by words such as: "anticipate," "intend," "plan," "goal," "seek," "believe," "project," "estimate," "expect," "strategy," "future," "likely," "may," "should," "will" and similar references to future periods. These statements are subject to numerous risks and uncertainties that could cause actual results to differ materially from what we expect. Examples of forward-looking statements include, among others, statements we make regarding our cash forecasts, the timing and success of our clinical trials and related data, the timing and expectations for regulatory submissions and approvals, timing and results of meetings with regulators, the timing of announcements and updates relating to our clinical trials and related data, our ability to enroll patients into our clinical trials, the expected impact of the COVID-19 pandemic on our operations and clinical trials, success in our collaborations, the potential addressable markets of the our product candidates and the potential therapeutic benefits and economic value of our lead product candidate or other product candidates. Further information on potential risk factors that could affect our business and its financial results are detailed in our most recent Quarterly Report on Form 10-Q for the quarter ended June 30, 2020 filed with the Securities and Exchange Commission (SEC), and other reports as filed with the SEC. We undertake no obligation to publicly update any forward-looking statement, whether written or oral, that may be made from time to time, whether as a result of new information, future developments or otherwise.

Media Contact:
Kelly Boothe, Ph.D.
Director, Corporate Communications
Aeglea BioTherapeutics

Investor Contact:
Joey Perrone
Senior Director, Finance & Investor Relations
Aeglea BioTherapeutics


Aeglea BioTherapeutics, Inc.
Condensed Consolidated Balance Sheets

(In thousands, except share and per share amounts)

    June 30,     December 31,  
    2020     2019  
CURRENT ASSETS                
Cash and cash equivalents   $ 65,713     $ 19,253  
Marketable securities     92,017       52,696  
Prepaid expenses and other current assets     4,136       2,556  
Total current assets     161,866       74,505  
Restricted cash     1,500       1,500  
Property and equipment, net     4,896       2,385  
Operating lease right-of-use assets     4,557       4,726  
Other non-current assets     92       67  
TOTAL ASSETS   $ 172,911     $ 83,183  
Accounts payable   $ 4,151     $ 3,154  
Operating lease liabilities     228       351  
Accrued and other current liabilities     11,511       14,854  
Total current liabilities     15,890       18,359  
Non-current operating lease liabilities     4,695       4,712  
Other non-current liabilities     68       31  
TOTAL LIABILITIES     20,653       23,102  
STOCKHOLDERS’ EQUITY                
Preferred stock, $0.0001 par value; 10,000,000 shares authorized
as of June 30, 2020 and December 31, 2019; no shares issued and
outstanding as of June 30, 2020 and December 31, 2019
Common stock, $0.0001 par value; 500,000,000 shares authorized
 as of June 30, 2020 and December 31, 2019; 44,599,847 shares and
 29,084,437 shares issued and outstanding as of June 30, 2020
 and December 31, 2019, respectively
    5       3  
Additional paid-in capital     387,475       255,142  
Accumulated other comprehensive income     39       51  
Accumulated deficit     (235,261 )     (195,115 )
TOTAL STOCKHOLDERS’ EQUITY     152,258       60,081  

Aeglea BioTherapeutics, Inc.
Condensed Consolidated Statements of Operations

 (In thousands, except share and per share amounts)

    Three Months Ended
June 30,
    Six Months Ended
June 30,
    2020     2019     2020     2019  
Operating expenses:                                
Research and development     16,869       14,806       31,431       29,195  
General and administrative     4,691       3,816       9,151       7,084  
Total operating expenses     21,560       18,622       40,582       36,279  
Loss from operations     (21,560 )     (18,622 )     (40,582 )     (36,279 )
Other income (expense):                                
Interest income     161       619       461       1,126  
Other expense, net     (19 )     (16 )     (25 )     (33 )
Total other income     142       603       436       1,093  
Net loss   $ (21,418 )   $ (18,019 )   $ (40,146 )   $ (35,186 )
Net loss per share, basic and diluted   $ (0.40 )   $ (0.55 )   $ (0.93 )   $ (1.14 )
Weighted-average common shares outstanding, basic and
    52,941,603       32,840,357       43,019,670       30,936,623  


Source: Aeglea BioTherapeutics, Inc.