On March 15, 2023 Prelude Therapeutics Incorporated (Nasdaq: PRLD), a clinical-stage precision oncology company, reported its financial results for the fiscal year ended December 31, 2022, and provided a corporate update (Press release, Prelude Therapeutics, MAR 15, 2023, View Source [SID1234628793]).
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"We made considerable progress in 2022, including the filing and acceptance of two new INDs for our next generation CDK4/6 inhibitor and our first-in-class, highly selective SMARCA2 degrader. Our current clinical pipeline consists of four differentiated and internally discovered molecules that effectively target and block key oncogenic pathways in both hematological malignancies and solid tumors. Prelude’s highly productive internal discovery engine continues to deliver novel molecules across multiple therapeutic classes, including significant advances in our research efforts focused on identifying an orally available SMARCA2 degrader," stated Kris Vaddi, Ph.D., Chief Executive Officer of Prelude.
Jane Huang, M.D., President and Chief Medical Officer of Prelude stated, "Prelude’s six preclinical and two clinical abstracts accepted for presentation at the upcoming AACR (Free AACR Whitepaper) Annual Meeting reflect the productivity and success of our research and development efforts. Initial data from PRT2527 and PRT1419 demonstrate encouraging safety, favorable pharmacokinetic and pharmacodynamic profiles in solid tumors, and support continued advancement in hematological cancers. Looking ahead, our top priority for 2023 is to efficiently advance these compounds forward into proof-of-concept clinical studies and determine appropriate next steps for each program."
"Our recently announced collaboration with BeiGene reflects our commitment to maximize the therapeutic value of combining our highly selective and potent CDK9 inhibitor, PRT2527, with BTK inhibitors in hematologic malignancies," added Dr. Huang.
Program Updates and Upcoming Milestones
PRT2527- CDK9 Inhibitor Program
PRT2527 is a potent and selective small molecule that has the potential to avoid off target toxicity and achieve higher clinical activity than other CDK9 programs currently in development. The Company is currently advancing PRT2527 as monotherapy in both solid and hematological indications. The Company also intends to pursue the clinically validated approach of combining PRT2527 with approved BTK inhibitors, beginning with its recently announced clinical collaboration with BeiGene.
Key 2023 objectives for this program include:
Present solid tumor safety dose escalation data at AACR (Free AACR Whitepaper) 2023
Determine RP2D in hematological malignancies in 2H 2023
Present initial clinical results for hematological malignancies at a medical conference in 2H 2023
PRT1419- MCL1 Inhibitor Program
Based on the Phase 1 dose escalation study in solid tumors, and safety measured by troponin levels and changes in ejection fraction, the Company is now advancing PRT1419 in hematologic malignancies as monotherapy. The Company also plans to study PRT1419 in combination with venetoclax and in combination with azacytidine.
Key 2023 objectives for this program include:
Solid tumor safety data to be presented at AACR (Free AACR Whitepaper) 2023
RP2D expected in hematological malignancies in 2H 2023
Hematological malignancy data expected to be presented in 2H 2023
PRT3645-Next Generation CDK4/6 Inhibitor Program
PRT3645 is a highly selective and differentiated CDK4/6 inhibitor. PRT3645 is a CDK4 biased compound with tissue and brain penetration qualities, and has potential in multiple indications including gliomas, head and neck cancers and non-small cell lung cancer, in addition to HR+/HER2- and HR+/HER2+ breast cancers.
Key 2023 objective includes:
Present initial Phase 1 clinical results at a medical conference in 2H 2023
SMARCA2 Targeted Protein Degrader Program
PRT3789 is an IV administered, potent and highly selective SMARCA2 degrader. It is designed to achieve the requisite high selectivity for SMARCA2 over the isoform, SMARCA4, through a targeted protein degrader approach. PRT3789 is a first-in-class SMARCA2 candidate and is currently in Phase 1 clinical development in biomarker selected SMARCA4 mutant patients.
Prelude’s discovery team has also identified orally bioavailable SMARCA2 degraders.
Key objectives include:
Provide Clinical update on PRT3789 2H 2023
Advance an oral SMARCA2 degrader for investigational new drug (IND) submission in 1H 2024
Upcoming presentations
The following clinical abstracts will be presented at AACR (Free AACR Whitepaper) 2023:
Title: A phase 1, open-label, dose-escalation study of PRT1419, a selective induced myeloid leukemia cell differentiation protein (MCL-1) inhibitor, in patients (pts) with advanced/metastatic solid tumors.
Presenter: Gerald Falchook
Session Title: First-in-Human Phase I Clinical Trials 2
Session Date and Time: Tuesday Apr 18, 2023, 9:00 AM – 12:30 PM
Location: Poster Section 45
Poster Board Number: 4
Abstract Presentation Number: CT172
Title: A phase 1, open-label, multicenter, dose-escalation study of PRT2527, a cyclin-dependent kinase 9 (CDK9) inhibitor, in adult patients (pts) with advanced solid tumors.
Presenter: Jason Henry
Session Title: First-in-Human Phase I Clinical Trials 2
Session Date and Time: Tuesday Apr 18, 2023 9:00 AM – 12:30 PM
Location: Poster Section 45
Poster Board Number: 5
Abstract Presentation Number: CT173
The following preclinical abstracts will be presented at AACR (Free AACR Whitepaper) 2023:
Title: SMARCA2 (BRM) degraders promote differentiation and inhibit proliferation in AML models
Presenter: Anjana Agarwal
Session Category: Experimental and Molecular Therapeutics
Session Title: New Therapeutic Targeted Agents
Session Date and Time: Monday Apr 17, 2023 9:00 AM – 12:30 PM
Location: Section 16
Poster Board Number: 17
Abstract Presentation Number: 1594
Title: Development of pharmacodynamic assays for quantifying SMARCA2 protein degradation and target gene expression in response to a SMARCA2 degrader (PRT3789)
Presenter: Andrew Moore
Session Category: Experimental and Molecular Therapeutics
Session Title: Pharmacokinetics, Pharmacodynamics, and Molecular Pharmacology
Session Date and Time: Monday Apr 17, 2023 1:30 PM – 5:00 PM
Location: Section 18
Poster Board Number: 15
Abstract Presentation Number: 2792
Title: Combination therapy with selective SMARCA2 (BRM) degraders for treatment of SMARCA4 (BRG1)-deficient cancers
Presenter: Michael Hulse
Session Category: Experimental and Molecular Therapeutics
Session Title: Epigenetics
Session Date and Time: Wednesday Apr 19, 2023 9:00 AM – 12:30 PM
Location: Section 20
Poster Board Number: 8
Abstract Presentation Number: 6270
Title: The brain penetrant CDK4/6 Inhibitor, PRT3645, is highly effective in combination with other targeted therapies in preclinical models of NSCLC and HER2-positive breast cancer
Presenter: Yue Zou
Session Category: Molecular/Cellular Biology and Genetics
Session Title: Cyclin-dependent Kinases and Cyclin-dependent Kinase Inhibitors
Session Date and Time: Wednesday Apr 19, 2023 9:00 AM – 12:30 PM
Location: Section 9
Poster Board Number: 2
Abstract Presentation Number: 5973
Title: MCL1 inhibitor PRT1419 demonstrates anti-tumor activity in PBRM1-altered clear cell renal cancer and synergizes with standard of care agents
Presenter: Norman Fultang
Session Category: Experimental and Molecular Therapeutics
Session Title: Cell Death Pathways and Treatment / Molecular Classification of Tumors for Diagnostics, Prognostics, and Therapeutic Outcomes
Session Date and Time: Wednesday Apr 19, 2023 9:00 AM – 12:30 PM
Location: Section 16
Poster Board Number: 9
Abstract Presentation Number: 6147
Title: Selective and orally bioavailable SMARCA2 targeted degraders induce synthetic lethality in SMARCA4- deficient solid tumor
Presenter: Koichi Ito
Session Category: Experimental and Molecular Therapeutics
Session Title: Epigenetics
Session Date and Time: Wednesday Apr 19, 2023 9:00 AM – 12:30 PM
Location: Section 20
Poster Board Number: 15
Abstract Presentation Number: 6277
Corporate Update
On February 20, 2023, Bryant D. Lim, Esq., joined Prelude Therapeutics as Chief Legal Officer and Corporate Secretary. He has more than 20 years of experience in pharma and biotech, with expertise in business development, regulatory matters, fundraising and SEC reporting. Kris Vaddi, Ph.D. commented, "We are excited to welcome Bryant to Prelude and expand our leadership team to include his relevant expertise. Bryant is an excellent addition, helping us to move forward in our growth as a Company."
Full Year 2022 Financial Results
Cash and Cash Equivalents: Cash and cash equivalents as of December 31, 2022 were $201.7 million. Following Prelude’s recently announced program prioritization initiatives, the Company has extended its cash guidance and anticipates that its existing cash, cash equivalents and marketable securities will fund Prelude’s operations through the fourth quarter of 2024.
Research and Development (R&D) Expenses: R&D expenses for the year ended December 31, 2022 increased $6.1 million to $92.9 million compared to $86.8 million for the year ended December 31, 2021. Included in research and development expenses for the year ended December 31, 2022, was $11.5 million of non-cash expense related to stock-based compensation expense, including employee stock options, compared to $9.5 million for the year ended December 31, 2021. The increase in research and development expense was primarily due to an increase in discovery-stage program expenses and from the growth and advancement of our clinical pipeline and an increase in non-cash stock-based compensation expense.
General and Administrative (G&A) Expenses: G&A expenses for the year ended December 31, 2022 increased by $3.7 million to $30.7 million compared to $27.0 million for the year ended December 31, 2021. Included in the general and administrative expenses for the year ended December 31, 2022, was $13.6 million of non-cash expense related to stock-based compensation expense, including employee stock options, as compared to $11.5 million for the same period in 2021. The increase in general and administrative expense was primarily due to an increase in non-cash stock-based compensation expense.
Net Loss: Net loss for the year ended December 31, 2022 was $115.4 million or $2.44 per share, compared with a net loss of $111.7 million, or $2.43 per share for the year ended December 31, 2021.