On February 26, 2020 G1 Therapeutics, Inc. (Nasdaq: GTHX), a clinical-stage oncology company, reported a corporate and financial update for the fourth quarter and full-year ended December 31, 2019 (Press release, G1 Therapeutics, FEB 26, 2020, View Source [SID1234554797]).
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"We achieved significant clinical and regulatory milestones across our pipeline in 2019. In 2020, our primary focus is the execution of our U.S. and European regulatory filings for trilaciclib for patients with small cell lung cancer and preparation for its commercial launch in the U.S.," said Mark Velleca, M.D., Ph.D., Chief Executive Officer. "We believe trilaciclib has the potential to improve outcomes for patients receiving chemotherapy across a broad range of tumor types. In 2020, we will initiate a Phase 3 trial in colorectal cancer and evaluate trilaciclib in the I-SPY 2 breast cancer trial."
Fourth Quarter Regulatory, Clinical and Corporate Highlights
Initiated rolling NDA submission for trilaciclib in small cell lung cancer (SCLC) in 4Q19 and expect to complete the filing in 2Q20. Certain portions of the NDA, including preclinical data, were submitted to the U.S. Food and Drug Administration (FDA) in the fourth quarter of 2019. The company plans to complete the filing in the second quarter of 2020.
Trilaciclib included in I-SPY 2 neoadjuvant breast cancer trial based on compelling overall survival (OS) findings in Phase 2 triple-negative breast cancer (TNBC) trial. At the European Society for Medical Oncology (ESMO) (Free ESMO Whitepaper) 2019 Congress, the company presented preliminary data from its randomized, open-label Phase 2 trial of trilaciclib in TNBC showing that the addition of trilaciclib to chemotherapy resulted in a significant increase in OS compared to chemotherapy alone (press release here). These findings contributed to trilaciclib being selected for inclusion in the ongoing Phase 2 I-SPY 2 TRIAL. Two new investigational treatment arms of the trial will evaluate trilaciclib in neoadjuvant treatment of locally advanced breast cancer. The study will generate data that will allow the company to evaluate trilaciclib in combination with several broadly-used chemotherapy classes, an anti-PD-1 immunotherapy, and a range of breast cancer subtypes (press release here).
Findings from Phase 1/2a rintodestrant monotherapy trial in patients with ER+, HER2- breast cancer support initiation of combination trials with CDK4/6 inhibitors. The company announced preliminary safety, tolerability and efficacy data on rintodestrant (formerly G1T48), its oral selective estrogen receptor degrader (SERD), at the 2019 European Society of Medical Oncology (ESMO) (Free ESMO Whitepaper) Congress in September (press release here). Based on these findings, G1 plans to
initiate an additional arm of its ongoing Phase 1/2a trial in the second quarter of 2020 to explore the combination regimen of rintodestrant and the CDK4/6 inhibitor Ibrance (palbociclib) as a treatment for ER+, HER2- breast cancer. Palbociclib will be provided by Pfizer Inc. under a non-exclusive clinical supply agreement.
Reported additional data from Phase 1b/2a clinical trial of lerociclib in combination with fulvestrant for the treatment of ER+, HER2- breast cancer. Updated findings presented at the 2019 San Antonio Breast Cancer Symposium showed lerociclib, dosed without a drug holiday, has a differentiated safety and tolerability profile than observed in clinical trials with currently marketed CDK4/6 inhibitors. Preliminary efficacy findings were consistent with other CDK4/6 inhibitors used in combination with fulvestrant. Additional safety and efficacy data are expected in the third quarter of 2020.
Fourth Quarter/Full-Year 2019 Financial Highlights and 2020 Guidance
Cash Position: Cash and cash equivalents totaled $269.2 million as of December 31, 2019, compared to $369.3 million as of December 31, 2018.
Operating Expenses: Operating expenses were $36.6 million for the fourth quarter of 2019, compared to $26.1 million for the fourth quarter of 2018. GAAP operating expenses include stock-based compensation expense of $4.5 million for the fourth quarter of 2019, compared to $3.3 million for the fourth quarter of 2018. Operating expenses for the full-year 2019 were $129.0 million, compared to $89.3 million for the prior year. Stock-based compensation expense for the full-year 2019 was $16.4 million, compared to $10.2 million for the prior year.
Research and Development Expenses: Research and development (R&D) expenses for the fourth quarter of 2019 were $24.5 million, compared to $19.1 million for the fourth quarter of 2018. R&D expenses for the full-year 2019 were $89.0 million, compared to $70.7 million for the prior year. The increase in R&D expenses was primarily due to an increase in clinical program costs, costs for manufacturing pharmaceutical active ingredients, and personnel costs due to additional headcount.
General and Administrative Expenses: General and administrative (G&A) expenses for the fourth quarter of 2019 were $12.1 million, compared to $7.0 million for the fourth quarter of 2018. G&A expenses for the full-year 2019 were $40.0 million, compared to $18.6 million for the prior year. The increase in G&A expenses was largely due to an increase in compensation due to additional headcount, increase in pre-commercialization activities, increase in medical affairs costs, and an increase in professional fees and other administrative costs necessary to support our operations.
Net Loss: G1 reported a net loss of $35.4 million for the fourth quarter of 2019, compared to $24.1 million for the fourth quarter of 2018. Net loss for the full-year 2019 was $122.4 million, compared to a net loss of $85.3 million for the prior year.
2020 Guidance: The company expects to end 2020 with $110-$130 million in cash and cash equivalents, prior to the consideration of potential proceeds from partnerships, collaboration activities, and/or other sources of capital. The company expects year-end 2019 cash and cash equivalents of $269.2 million to be sufficient to fund its operating expenses and capital expenditure requirements into the second half of 2021.
Key Anticipated 2020 Milestones
Complete NDA submission for trilaciclib in SCLC in 2Q20 and Marketing Authorization Application to the European Medicines Agency in 4Q20.
Begin enrollment in I-SPY 2 clinical trial of trilaciclib in neoadjuvant breast cancer in 2Q20.
Initiate additional arm of rintodestrant Phase 1/2a trial to evaluate combination with Ibrance (palbociclib) in 2Q20; additional Phase 1/2a monotherapy data expected in 4Q20.
Initiate Phase 3 clinical trial of trilaciclib in colorectal cancer in 4Q20.
Webcast and Conference Call
The management team will host a webcast and conference call at 4:30 p.m. ET today to provide a corporate and financial update for the fourth quarter and full-year 2019 ended December 31, 2019. The live call may be accessed by dialing 866-763-6020 (domestic) or 210-874-7713 (international) and entering the conference code: 4188787. A live and archived webcast will be available on the Events & Presentations page of the company’s website: www.g1therapeutics.com. The webcast will be archived on the same page for 90 days following the event.