PharmaCyte Biotech Launches Malignant Ascites Program with Commencement of Pivotal Preclinical Study

On November 30, 2021 PharmaCyte Biotech, Inc. (NASDAQ: PMCB), a biotechnology company focused on developing cellular therapies for cancer and diabetes using its signature live-cell encapsulation technology, Cell-in-a-Box, reported the commencement of a pivotal study to determine if the treatment PharmaCyte uses for locally advanced, inoperable pancreatic cancer—Cell-in-a-Box (CypCaps) combined with the cancer killing prodrug ifosfamide—can also delay the rate of production and accumulation of malignant ascites (Press release, PharmaCyte Biotech, NOV 30, 2021, View Source [SID1234596280]). This is fluid that accumulates in the abdominal cavity from various cancers.

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PharmaCyte’s Chief Executive Officer, Kenneth L. Waggoner, said, "We are enthusiastic to relaunch our malignant ascites program and resume our work on developing a treatment for malignant ascites. We plan to conduct another preclinical study in Germany with Heidelberg Pharma that mimics an earlier study which showed the production of malignant ascites can be delayed by our cancer treatment. The cancer cells we will be using in the study have been ordered, and the design of the protocol is underway.

"The Chairman of our Medical and Scientific Advisory Board, Dr. Matthias Löhr, is overseeing the study. We will be using the same animal study model that Dr. Löhr used in the earlier study that showed promise."

Malignant ascites is fluid secreted by abdominal tumors which includes liver, breast, colon, stomach, intestine, ovarian and uterine cancers. This fluid contains cancer cells that can seed and form new tumors throughout the abdomen. Malignant ascites accumulates in the abdominal cavity, causing swelling of the abdomen, severe breathing difficulties and extreme pain. It must be removed on a periodic basis, which is painful and costly.

Currently, there is no available therapy that prevents or delays the production and accumulation of malignant ascites. PharmaCyte plans to change the treatment landscape for malignant ascites fluid using its treatment.

To learn more about PharmaCyte’s pancreatic cancer treatment and how it works inside the body to treat locally advanced, inoperable pancreatic cancer, we encourage you to watch the company’s documentary video complete with medical animations at: View Source

Mereo BioPharma Reports Interim Data from ACTIVATE Phase 1b/2 Open Label Study of etigilimab Anti-TIGIT Antibody in combination with Nivolumab in Solid Tumors

On November 30, 2021 Mereo BioPharma Group plc (NASDAQ: MREO) ("Mereo" or the "Company"), a clinical stage biopharmaceutical company focused on oncology and rare diseases, reported promising interim efficacy, safety, and biomarker data on patients from ACTIVATE, a Phase 1b/2 study of its anti-TIGIT antibody, etigilimab, in combination with nivolumab in select recurrent advanced / metastatic solid tumors (Press release, Mereo BioPharma, NOV 30, 2021, View Source [SID1234596277]).

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"These early results from the ACTIVATE study are highly encouraging and support the further study of etigilimab in combination with an anti-PD-1 antibody in solid tumor types, especially in gynecologic malignancies," said Dr. Denise Scots-Knight, Chief Executive Officer of Mereo. "We are particularly excited by the complete response in the cervical cancer cohort and the partial response in one of the ovarian cancer patients treated to-date. In the efficacy analysis set, biomarker analysis showed a positive trend between baseline PVR expression and clinical benefit including in the absence of PD-L1 expression in the efficacy analysis population. Clinical benefit also occurred in tumor types with historically low response rates to anti-PD-1/PDL-1 antibodies. We look forward to providing additional updates on the study in 2022."

The ACTIVATE study aims to enroll approximately 125 patients across seven parallel cohorts. At the time of the data cut-off, 22 patients were included in the safety analysis set, 20 patients were evaluable with a minimum of at least one scan (as of November 8, 2021) and 15 patients were included in the efficacy analysis population.

As of the cut-off date, there are one complete response in cervical cancer, one partial response in ovarian cancer and four instances of stable disease in ovarian cancer, cervical cancer, and uveal melanoma. The ovarian cohort in ACTIVATE has now crossed futility for expansion into the second stage of the study (IDMC review pending). These results add to the earlier Phase 1b data of etigilimab in combination with nivolumab, with a partial response in the single ovarian cancer patient of the 8 patients evaluable and support the continued development of this dual checkpoint combination regimen.

The combination of etigilimab and nivolumab has been safe and well tolerated, with no new safety signals. The most common treatment-related adverse events were skin reactions, observed in seven patients. None of these reactions required treatment with systemic steroids. There was one case of immune diabetes mellitus.

Conference Call and Webcast

Mereo BioPharma will hold a conference call today, November 30, 2021, at 8:30am ET. To participate by telephone, please dial (866) 688-2942 (Domestic) or (561) 569-9224 (International). The conference ID number is 6585106. To view the slideshow please use the live webcast which can be accessed through the Investors section of the Company’s website at www.Mereobiopharma.com/investors. An archived replay of the webcast will be available on the Company’s website for two weeks following the live presentation.

RedHill Biopharma Reports Operational Highlights and Third Quarter 2021 Financial Results

On November 30, 2021 RedHill Biopharma Ltd. (Nasdaq: RDHL) ("RedHill" or the "Company"), a specialty biopharmaceutical company, reported its financial results and operational highlights for the third quarter ended September 30, 2021 (Press release, RedHill Biopharma, NOV 30, 2021, View Source [SID1234596275]).

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Dror Ben-Asher, RedHill’s Chief Executive Officer, said: "Our U.S. commercial business continues to drive growth, delivering a second consecutive quarterly net revenue record of $21.6 million despite the continuously challenging pandemic environment. Talicia generated another record quarter with 15% growth in new prescriptions, while Movantik continues to perform adding a 1.1% increase to new prescriptions. Both products are also continuing to make strides in gaining both commercial and government formulary coverage. In addition, gross margin increased from 51% in the second quarter to 57% in the third quarter. The Company has successfully attracted a strategic investment from South Korea’s Kukbo and continues to demonstrate responsible financial discipline across the entire business as we strive to achieve our long-term growth aims."

Mr. Ben-Asher added: "Given the recent emergence of the heavily mutated Omicron variant as well as likely emergence of other variants over time, the importance of drug candidates that act independently of the viral spike protein is growing. This makes both opaganib and RHB-107’s host-targeted mechanism of action, and expected maintenance of effect against new variants, increasingly more relevant in the battle against COVID-19. This quarter saw significant focus on our opaganib Phase 2/3 COVID-19 study. The initial top-line results demanded further investigation and our rigorous post-hoc analysis provided much greater clarity into the potential of novel, orally-administered opaganib in the underserved hospitalized moderately severe patient group. This is a group of patients for which no novel therapeutic pill has shown a benefit until opaganib, which demonstrated a 62% reduction in mortality, improved return to room air and earlier hospital discharge for opaganib-treated patients. The results of this analysis, in a group of more than half the total study population, were consistent with what we had seen in our Phase 2 study and compassionate use experience. Despite being a post-hoc analysis, the consistency across multiple endpoints and territories provides us with a high degree of confidence in the results showing opaganib’s effect in this patient population. This analysis also shed light on key issues of the COVID-19 disease severity classification, suggesting that FiO2 might be an improved method for classifying disease severity and predictor of treatment outcome. We have now provided regulators in various countries with all the necessary data to facilitate discussions on the next steps and we continue to provide the data to regulators in additional countries."

"In parallel, we continue to progress our Phase 2/3 study in the U.S. and South Africa with our other novel, once-daily, oral COVID-19 antiviral drug candidate, RHB-107, which has now completed enrollment for Part A of the study, with top-line results expected in the first quarter of 2022. Our Phase 3 study of RHB-204 in pulmonary nontuberculous mycobacteria (NTM) disease continues to enroll patients in the U.S. and progress with Phase 3-stage RHB-104 for Crohn’s disease is expected to speed up thanks to recent, much-awaited, potential progress in Mycobacterium avium subspecies paratuberculosis (MAP) detection research2."

"With a steep reduction in quarterly operating and net loss and continued commercial business growth, leading to a potential commercial operational breakeven before the end of the year, coupled with advanced, exciting and timely R&D pipeline progress, I believe RedHill is well positioned for short, medium and long-term success."

2

Financial highlights for the quarter ended September 30, 20213

Net Revenues were $21.6 million for the third quarter of 2021, as compared with $21.5 million for the second quarter of 2021. The increase is attributable to an increase in sales of Talicia and Movantik, partially offset by an increase in gross-to-net deductions, mainly commercial rebates and Medicare discounts.

Gross Profit was $12.4 million for the third quarter of 2021, compared to $10.9 million for the second quarter of 2021 – an increase of 14%. Gross margin increased from 51% in the second quarter of 2021 to 57% in the third quarter of 2021. The increase in gross profit was mainly attributable to a reversal of inventory write-off recognized in the third quarter of 2021 following the FDA approval of an extension to Talicia stock expiration date.

Research and Development Expenses were $5.8 million for the third quarter of 2021, a decrease of $4.5 million, a 44% reduction compared to the second quarter of 2021, mainly attributable to the completion of our global COVID-19 Phase 2/3 study with opaganib.

Selling, Marketing and General and Administrative Expenses were $24 million for the third quarter of 2021, a decrease of $1.5 million compared to the second quarter of 2021. The decrease was mainly attributable to expenses related to share-based compensation in the previous quarter.

Operating Loss and Net Loss were $17.4 million and $21.4 million, respectively, for the third quarter of 2021 compared to $24.9 million and $29.1 million, respectively, in the second quarter of 2021. The decrease was mainly attributable to the Talicia inventory expiration date extension, completion of our opaganib Phase 2/3 COVID-19 study and a decrease in expenses related to share-based compensation, as detailed above.

Net Cash Used in Operating Activities was $19 million for the third quarter of 2021, similar to the second quarter of 2021.

Net Cash Used in Financing Activities was $1 million for the third quarter of 2021, comprised primarily of payables with respect to the Movantik acquisition, partially offset by proceeds from utilization of ATM and from exercise of options.

Cash Balance as of September 30, 2021, was $51.5 million.

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Additional Financial Highlights

In November 2021, the Company announced that it had entered into a strategic agreement with Kukbo Co. Ltd., a South Korean corporation, for the sale of RedHill’s American Depositary Shares (ADSs) in a private placement of up to $10 million, of which the first tranche of $5 million has been paid. As part of the agreement, the Company granted Kukbo a six month right of first offer for a license with respect to one or more of opaganib, RHB-107 (upamostat) and Talicia for South Korea and other Asian territories.

In addition, this month, the Company completed an underwritten public offering of approximately 4.7 million ADSs for gross proceeds of approximately $15.5 million, led by Cantor Fitzgerald.

Commercial Highlights

Movantik (naloxegol)4
The Company’s focus on driving Movantik performance and strengthening of market share continues unabated, resulting in another quarter of new prescription growth, increasing by 1.1% compared to the previous quarter.

The Company has achieved significant market access successes with U.S. major payors, continuing to increase the levels of payor coverage.

In July, one of America’s largest payors, serving many Blue Cross and Blue Shield Plans and more than 30 million members, had added Movantik as a preferred brand with no restrictions to its Commercial NetResults "A" series formularies and as a preferred brand on its other commercial formularies starting July 1, 2021. In April, Movantik was also included on the Part D formulary of another major payor with no restrictions. Almost 9 out of 10 U.S. commercial lives are now covered, and we continue to work toward additional formulary coverage for the remaining patients.

In September 2021 RedHill Biopharma Inc., AstraZeneca AB, AstraZeneca Pharmaceuticals LP and Nektar Therapeutics entered into a settlement and license agreement with Aurobindo Pharma USA, Inc. resolving their patent litigation in the U.S. in response to Aurobindo’s Abbreviated New Drug Application (ANDA) seeking approval by the FDA to market a generic version of Movantik. This follows the previously announced resolution of the Apotex litigation and brings to a close all presently pending Movantik patent litigation brought pursuant to The Drug Price Competition and Patent Term Restoration Act (the Hatch-Waxman Act). The earliest licensed entry date of any generic naloxegol in the U.S. is October 1, 2030.

Talicia (omeprazole magnesium, amoxicillin and rifabutin)5
Talicia achieved another record quarter, delivering a 15% increase in new prescriptions, compared to the previous quarter, reflecting 117% growth of Talicia as compared to Q3/2020.

In October, Medi-Cal – California’s Medicaid Health Care program covering two million beneficiaries – had added Talicia to its Contract Drug List (CDL) for H. pylori treatment, with no prior authorization required. This coverage is expected to expand to 14 million beneficiaries on January 1, 2022. During the same month, a new U.S. Patent covering Talicia was granted. This patent reinforces the protection for Talicia through 2034, and the Company has listed this patent in the FDA’s Approved Drug Products with Therapeutic Equivalence Evaluations, or Orange Book.

4
In July, the Company significantly expanded commercial coverage for Talicia, announcing that OptumRx, part of the UnitedHealth Group, a leader in healthcare coverage, partnered with more than 1.3 million healthcare professionals and 6,500 hospitals, had added Talicia to its Commercial Formulary as an unrestricted brand for H. pylori treatment, effective July 1, 2021. This agreement expanded access to Talicia to 26 million additional Americans and increased overall patient access to Talicia to greater than 8 out of 10 covered U.S. Commercial lives.

Aemcolo (rifamycin)6
The Company has maintained promotion of Aemcolo in the third quarter of 2021 supporting the initial momentum that Aemcolo was generating pre-COVID-19 travel restrictions. RedHill and Cosmo Pharmaceuticals N.V are currently in discussions with respect to the amendment of the Aemcolo License Agreement.

R&D Highlights

COVID-19 Program: Opaganib (ABC294640)7
In September 2021, the Company announced top-line results from the global 475-patient Phase 2/3 study in hospitalized patients with severe COVID-19 pneumonia (NCT04467840). Whilst results showed consistent trends in favor of the opaganib arm, the study endpoints did not achieve statistical significance.

A post-hoc analysis of data from 251 study participants requiring a Fraction of inspired Oxygen (FiO2) up to 60% at baseline (54% of the study participants), was subsequently reported in October 2021, demonstrating that treatment with oral opaganib resulted in a 62% reduction in mortality as well as improved outcomes in time to room air and median time to hospital discharge, in this large group of hospitalized, moderately severe COVID-19 patients.

The results provide a strong rationale for opaganib’s potential efficacy in hospitalized patients in need of oxygen supplementation up to 60% FiO2, a large proportion of hospitalized COVID-19 patients. The Phase 2/3 study results are also consistent with opaganib’s earlier U.S Phase 2 study results and the demonstrated potent antiviral inhibition of SARS-CoV-2 variants in human bronchial epithelial cells, providing further support for its potential in earlier stages of disease where viral load is higher.

Additional new preclinical results demonstrating opaganib’s efficacy in significantly decreasing renal fibrosis in a unilateral ureteral obstruction-induced renal interstitial fibrosis mode were also reported by the Company in September 2021.

5
The Company has submitted data packages for opaganib to the regulatory agencies in the U.S., EU, UK and other territories, ahead of planned regulatory advice, with the European Medicines Agency (EMA) having provided expedited evaluation process timelines. As previously stated, additional studies to support the potential of such applications and the use or marketing of opaganib are likely to be required. For example, the FDA has previously indicated that we will need to complete additional studies to support applications in the U.S. The strength of the safety and efficacy data generated from the opaganib studies will be key to regulatory applications.

The Company also continues its discussions with U.S. and other government agencies and non-governmental organizations around potential funding to support the ongoing development of opaganib. Discussions are also ongoing with potential partners who are interested in the rights to opaganib in various territories.

COVID-19 Program: RHB-107 (upamostat)8
RedHill continues to advance the Phase 2/3 study of novel, once-daily, orally-administered, antiviral drug candidate, RHB-107, in the treatment of non-hospitalized patients with symptomatic COVID-19 in the early course of the disease who do not require supplemental oxygen – the vast majority of COVID-19 patients. The study plans to test for the Omicron variant.

Further to announcing in September 2021 that South Africa had joined the U.S. in approving the Phase 2/3 study, along with the expansion to additional U.S. sites, the Company announced this month that the last patient had been enrolled in Part A of the Phase 2/3 study. The study is a 2-part trial designed to evaluate time to sustained recovery from illness as the primary endpoint and for dose selection. A total of 61 patients have been enrolled in Part A and based on safety and tolerability results of part A, a dose for part B will be selected. Top-line results from Part A of the study are expected in the first quarter of 2022, with Part B of the study expected to follow subsequent to discussions with regulators.

RHB-204 – Pulmonary Nontuberculous Mycobacteria (NTM) Disease
A U.S. Phase 3 study is ongoing to evaluate the efficacy and safety of RHB-204 in adults with pulmonary NTM disease caused by Mycobacterium avium Complex (MAC) infection. The Company is also assessing potential expansion of the RHB-204 Phase 3 study to additional territories.

The Company previously announced that the FDA granted Fast Track designation for RHB-204, providing early and frequent communications and a rolling review of any New Drug Application (NDA). RHB-204 is also eligible for NDA Priority Review and Accelerated Approval.

RHB-204 was granted FDA Orphan Drug designation and Qualified Infectious Disease Product designation, extending its U.S. market exclusivity to a potential total of 12 years upon potential FDA approval.

6
RHB-104 – Crohn’s Disease
Based on recent published research, potential progress in Mycobacterium avium subspecies paratuberculosis (MAP) diagnostic technology may enable us to advance the program towards a confirmatory study in approximately 150 MAP positive moderate-severe Crohn’s patients, subject to required regulatory input.

Opaganib – Prostate Cancer and Cholangiocarcinoma
In August 2021, we announced that, based on a preliminary review of partial and unaudited data, the ongoing Phase 2 study for prostate cancer had met its primary endpoint of at least six subjects demonstrating disease control (defined as stable disease or better after 16 weeks on treatment) among at least 27 evaluable subjects. Upon further review and analysis of the unaudited data, the Company reported that the study did not meet its primary endpoint in the study arm evaluating opaganib in combination with enzalutamide. Patient enrolment continues for the study’s other arm, evaluating a combination of opaganib and abiraterone. Accrual and data entry are ongoing and results for the study remain subject to further review and analysis.

The Phase 2a study evaluating the activity of opaganib in advanced cholangiocarcinoma (bile duct cancer) is ongoing at Mayo Clinics in Arizona and Minnesota, Emory University and the Huntsman Cancer Institute at the University of Utah. Enrollment has been completed for the first cohort of 39 patients, evaluating the activity of orally-administered opaganib as a stand-alone treatment. Preliminary data from this cohort indicated a signal of activity in a number of subjects with advanced cholangiocarcinoma. Enrollment is ongoing for a second cohort, evaluating opaganib in combination with hydroxychloroquine, an anti-autophagy agent.

Conference Call and Webcast Information:

The Company will host a webcast today, Tuesday, November 30, 2021, at 8:30 a.m. EST, during which it will present key highlights for the third quarter of 2021.

The webcast including slides will be broadcast live on the Company’s website, View Source, and will be available for replay for 30 days.

To participate in the conference call, please dial one of the following numbers 15 minutes prior to the start of the call: United States: +1-877-870-9135; International: +1-646-741-3167 and Israel: +972-3-530-8845; the access code for the call is: 9753927.

Spectrum Pharmaceuticals to Participate in JMP Securities Hematology and Oncology Summit

On November 30, 2021 Spectrum Pharmaceuticals (NasdaqGS: SPPI), a biopharmaceutical company focused on novel and targeted oncology therapies, reported that management will participate in the JMP Securities Hematology and Oncology Summit, a virtual presentation is scheduled for Tuesday, December 7, 2021 at 2:40 p.m. ET / 11:40 a.m. PT (Press release, Spectrum Pharmaceuticals, NOV 30, 2021, View Source [SID1234596274]).

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A live webcast of the presentation will be available from the Investor Relations section of the company’s website at View Source with a replay available shortly after the event.

Olema Oncology Announces First Clinical Data on OP-1250 in Advanced ER+ / HER2- Breast Cancer

On November 30, 2021 Olema Pharmaceuticals, Inc. ("Olema" or "Olema Oncology," Nasdaq: OLMA), a clinical-stage biopharmaceutical company focused on the discovery, development and commercialization of targeted therapies for women’s cancers, reported the first clinical data from the Phase 1 dose-escalation portion of the ongoing Phase 1/2 clinical trial of OP-1250, a complete estrogen receptor (ER) antagonist (CERAN) and a selective ER degrader (SERD) in development for the treatment of metastatic breast cancer and other women’s cancers (Press release, Olema Oncology, NOV 30, 2021, View Source [SID1234596273]). Data as of October 1, 2021, is scheduled to be presented in a poster presentation at the San Antonio Breast Cancer Symposium (SABCS), taking place December 7-10, 2021. Updated data as of November 1, 2021, are detailed below.

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These initial data provide strong proof-of-concept for OP-1250 as a once-daily oral monotherapy in women with recurrent, locally advanced or metastatic ER+ / HER2- breast cancer and demonstrate OP-1250’s potential to become a best-in-class endocrine therapy. In the trial, OP-1250 showed highly attractive pharmacokinetics supporting once-daily dosing, favorable tolerability, and clear evidence of anti-tumor activity. Three partial responses (2 confirmed, 1 unconfirmed) and robust target lesion reduction up to 100% were observed in a heavily pretreated patient population. In the recommended Phase 2 dose (RP2D) range of 60-120 mg OP-1250 once daily, the overall response rate (ORR) was 17% and the clinical benefit rate (CBR) was 46%.

"We successfully delivered on our objectives for the dose-escalation stage of our ongoing Phase 1/2 trial of OP-1250, with the desired pharmacokinetics, favorable tolerability, and early but clear efficacy signals. We are particularly encouraged by the responses observed in patients who had received multiple prior lines of therapy and harbored ESR1 activating mutations, demonstrating that OP-1250 is an active drug and achieved sufficient exposure levels to block the ER-mediated cancer cell growth and proliferation signal," said Sean P. Bohen, M.D., Ph.D., President and Chief Executive Officer of Olema Oncology. "These data give us confidence to rapidly advance our development program in both monotherapy and combination settings, as we work to further position OP-1250 as a differentiated, potential best-in-class CERAN that we believe could become the backbone endocrine therapy of choice for ER+ breast cancer."

"These promising interim data suggest OP-1250 may provide meaningful benefit to patients with advanced or metastatic breast cancer, and who may have limited treatment options remaining," said Pamela M. Klein, M.D., Chief Medical Officer. "Having accomplished our intended goals with the completed Phase 1 dose escalation, we are currently enrolling patients in dose expansion at two dose levels and expect to initiate Phase 2 monotherapy and the first combination study with a CDK4/6 inhibitor in the first quarter of 2022. As we accelerate enrollment in the coming months, we look forward to gaining additional insights into OP-1250’s potentially differentiated and best-in-class profile."

Interim Results from Phase 1a Dose Escalation of OP-1250 as a Monotherapy

Pharmacokinetics (PK), safety, tolerability, and anti-tumor activity of once-daily OP-1250 monotherapy were evaluated in the open-label, dose-escalation portion of the ongoing Phase 1/2 clinical trial (NCT04505826). As of November 1, 2021, a total of 41 patients with recurrent, locally advanced or metastatic ER+ / HER2- breast cancer were enrolled across 7 dose cohorts (30 mg, 60 mg, 90 mg, 120 mg, 150 mg, 210 mg, and 300 mg once-daily).

This was a difficult-to-treat, heavily pretreated population: 95% of patients were previously treated with a cyclin-dependent kinase (CDK) 4/6 inhibitor (9 patients, or 22%, received 2 or more prior CDK4/6 inhibitor regimens), 68% of patients received prior fulvestrant, and 42% received prior chemotherapy in the advanced setting. Overall, patients received a median of 3 prior lines of anti-cancer therapy and 2 prior lines of endocrine therapy in advanced settings. Of 39 patients whose circulating tumor DNA (ctDNA) was assessed, ESR1 mutations were detected in 49% at baseline.

PK

Pharmacokinetic analyses demonstrated dose-proportional increases in OP-1250 exposures across all evaluated doses, high oral bioavailability and steady-state plasma levels with minimal peak-to-trough variability. At doses 60 mg and above, OP-1250 achieved exposures exceeding the predicted thresholds for maximal anti-tumor efficacy based on preclinical models.

Tolerability

OP-1250 was generally well tolerated, and no dose-limiting toxicities were reported at any of the seven dose levels studied. A maximum tolerated dose was not reached. The majority of reported adverse events were grade 1 or 2 at all dose levels, and the most common treatment-related adverse events as assessed by study investigator were nausea (49%), fatigue (34%), vomiting (22%) and headache (17%). No clinically significant bradycardia, ocular toxicities or diarrhea occurred. A RP2D range of 60 to 120 mg was identified for further evaluation based on pharmacokinetics, favorable tolerability, and initial evidence of anti-tumor efficacy.

Efficacy

Three partial responses were observed among 24 efficacy-evaluable patients, including 2 confirmed partial responses and 1 unconfirmed partial response in a patient with robust target lesion reduction of 100%, but whose response remained unconfirmed due to progressive disease with a new lesion appearing at a follow-up visit. All 3 responses occurred in patients with ESR1 mutations and who had previously received CDK4/6 and aromatase inhibitors, and fulvestrant. Four response-eligible patients had target lesion reductions of greater than 30%.

Patients were considered efficacy-evaluable for ORR if they had RECIST-measurable disease at baseline and at least one post-baseline tumor assessment or discontinued treatment prior to their first post-baseline assessment, and for CBR if they were enrolled at least 24 weeks prior to the data cut-off date. Across all doses, the ORR was 8% (2/24) and the CBR was 29% (7/24). For the dose levels within the RP2D range, the ORR was 17% (2/12) and the CBR was 46% (6/13).

As of the data cut-off date, 32% of patients (13/41) remained on treatment with efficacy data continuing to mature, including both patients with confirmed partial responses.

Anticipated Milestones

Based on these promising data, Olema is rapidly advancing OP-1250’s clinical development program with a number of anticipated program milestones. Phase 1b dose expansion is ongoing at two dose levels (60 mg and 120 mg daily) and is expected to enroll 15 patients in each cohort. Findings from this stage will help inform selection of the RP2D.

Phase 2 efficacy evaluation is expected to initiate in Q1 2022 with approximately 80 patients enrolled across three cohorts: patients with measurable disease (n=50), patients with non-measurable disease (n=15), and patients with CNS metastasis (n=15). The first Phase 1b combination study with a CDK4/6 inhibitor is expected to initiate in Q1 2022, with additional combination studies with CDK4/6 and PIK3CA inhibitors planned in 2022. A pivotal study for OP-1250 in the metastatic setting is expected to initiate in 2023.

Conference Call and Webcast Details

Olema will host a conference call and webcast presentation for analysts and investors on Tuesday, November 30, 2021, at 8:30 a.m. ET (5:30 a.m. PT) to review the Phase 1 clinical data for OP-1250. The webcast player and accompanying slides may be accessed on the Investors section of Olema’s website at www.olema.com. The conference call may be accessed by dialing +1 (833) 303-1210 for U.S. callers and +1 (918) 922-6526 for international callers and providing the passcode 7627078. A replay of the webcast will be available approximately two hours after the completion of the event and may be accessed by visiting Olema’s website.

About Breast Cancer

Breast cancer is the second-most common cancer worldwide, with nearly two million new diagnoses per year. In the U.S., breast cancer represents approximately 30% of all new diagnoses of women’s cancer. In 2021, the American Cancer Society estimates there will be approximately 281,550 new cases of invasive breast cancer diagnosed in women, and more than 43,600 women will die from breast cancer in the U.S. The estrogen receptor plays an important role in the development, progression, and treatment of hormone-dependent breast cancer. Approximately 75% of all breast cancers are ER+, and approximately 65% are ER+, HER2-.