On August 10, 2021 Regulus Therapeutics Inc. (Nasdaq: RGLS), a biopharmaceutical company focused on the discovery and development of innovative medicines targeting microRNAs (the "Company" or "Regulus"), reported financial results for the second quarter ended June 30, 2021 and provided a corporate update (Press release, Regulus, AUG 10, 2021, View Source [SID1234586222]).
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"The team at Regulus accomplished a lot over the last several months, including the achievement of several major milestones in our ADPKD program, the completion of meeting preparations with FDA and extending our cash runway into Q4 of next year," commented Jay Hagan, CEO of Regulus. "In addition, we are pleased to have completed enrollment of the second cohort of our Phase 1b trial of RGLS4326 for ADPKD, for which we expect to report topline data in the next several months. Additionally, we look forward to obtaining FDA feedback on our approach for addressing the remaining partial clinical hold requirements through our meeting request."
Program Updates
RGLS4326 for ADPKD: In June 2021, the Company presented additional data from the first cohort of patients in its Phase 1b clinical trial of RGLS4326 for the treatment of ADPKD, as well as new preclinical data from relevant animal models of the disease, at PKD Connect 2021. The additional data presented at PKD Connect demonstrated clinical proof of mechanism by showing statistically significant increases in polycystin levels in ADPKD patients by targeting miR-17 in the kidneys. Levels of PC1 and PC2 have previously been shown to be inversely correlated with disease severity. RGLS4326 was well-tolerated with no serious adverse events.
The Phase 1b study is an adaptive design, open-label, multiple dose study in up to three cohorts of patients with ADPKD evaluating the safety, pharmacokinetics, and effects on pharmacodynamic biomarkers of multiple doses of RGLS4326. In the first cohort of the study, nine patients were enrolled and received four doses of 1mg/kg of RGLS4326 administered every other week.
The Company also presented new data from relevant preclinical models showing treatment with RGLS4326 resulted in increased gene and polycystin levels in vitro. Improvements in key disease markers including serum creatinine and BUN were demonstrated in the Pkd1(F/RC) mouse model that harbors a mutation in the Pkd1 gene equivalent to human ADPKD. Mutation to the Pkd1 gene is reported for 85% of diagnosed patients with ADPKD.
In late July 2021, the Company completed enrollment of the second cohort of patients in its Phase 1b clinical study of RGLS4326. The patients in the second cohort are being administered 0.3mg/kg of RGLS4326 every other week for four doses. The dose of RGLS4326 for the third and final cohort will be chosen based on the results of this second cohort and enrollment is expected to commence thereafter. The Company expects to report topline data from the second cohort in the fourth quarter.
The Company requested a Type A meeting with FDA to discuss the data supporting its approach to addressing the remaining partial clinical hold requirements. FDA typically responds to a sponsor’s request with the meeting being scheduled within 30 days from the receipt of the meeting request.
Corporate Highlights
Raised $15.4 Million in Gross Proceeds Through its ATM Facility: A total of 12,007,546 shares were sold and settled for gross proceeds of $15.4 million at a weighted average price per share of $1.28 under the ATM facility during the three months ended June 30, 2021. The Company expects its existing cash will provide cash resources to fund planned activities into Q4 2022.
Financial Results
Cash Position: As of June 30, 2021, Regulus had $41.4 million in cash and cash equivalents.
Research and Development (R&D) Expenses: Research and development expenses were $4.2 million and $7.5 million for the three and six months ended June 30, 2021, respectively, compared to $4.2 million and $7.4 million for the same periods in 2020, respectively. These amounts reflect internal and external costs associated with advancing our clinical and preclinical pipeline.
General and Administrative (G&A) Expenses: General and administrative expenses were $2.5 million and $5.0 million for the three and six months ended June 30, 2021, respectively, compared to $2.3 million and $4.7 million for the same periods in 2020, respectively. These amounts reflect personnel-related and ongoing general business operating costs.
Net Loss: Net loss was $6.0 million, or $0.08 per share (basic and diluted), and $12.0 million, or $0.16 per share (basic and diluted), for the three and six months ended June 30, 2021, compared to $6.9 million, or $0.23 per share (basic and diluted), and $12.9 million, or $0.48 per share (basic and diluted), for the same periods in 2020.
About ADPKD
ADPKD, caused by the mutations in the PKD1 or PKD2 genes, is among the most common human monogenic disorders and a leading cause of end-stage renal disease. The disease is characterized by the development of multiple fluid filled cysts primarily in the kidneys, and to a lesser extent in the liver and other organs. Excessive kidney cyst cell proliferation, a central pathological feature, ultimately leads to end-stage renal disease in approximately 50% of ADPKD patients by age 60.
About RGLS4326
RGLS4326 is a novel oligonucleotide designed to inhibit miR-17 and preferentially target the kidney. Preclinical studies with RGLS4326 have demonstrated direct regulation of Pkd1 and Pkd2, reduction of cyst growth in human in vitro ADPKD models, and attenuation of cyst proliferation and improvement of kidney function in mouse models of ADPKD. The RGLS4326 IND is currently on a partial clinical hold for treatment of extended duration by FDA until the second set of requirements outlined by the agency have been satisfactorily addressed. The Company will use information from the Phase 1 clinical studies, including the first cohort of the Phase 1b together with information from the recently completed additional nonclinical studies generated in 2020, in its plan to address the second set of requirements outlined in the Partial Clinical Hold letter to support studies of extended duration. Regulus plans to discuss its approach to addressing the remaining Partial Clinical Hold requirements with FDA in the third quarter 2021. RGLS4326 received orphan drug designation from FDA in July 2020.