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Biopharma Co. Posts Positive Objective Response & Disease Control Rates in Ovarian Cancer Studies

September 15, 2021 (Investorideas.com Newswire) H.C. Wainwright & Co. advised in a research report that updated data from Mersana Therapeutics Inc.’s expansion study supports its UPLIFT Study and will provide the basis for a new Phase 3 study in 2022. H.C. Wainwright rates Mersana a “Buy” with a target price of $28.00/share.

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In a September 10 research note, H.C. Wainwright & Co. Analyst, Edward White, advised that clinical stage biopharmaceutical company Mersana Therapeutics Inc. (MRSN:NASDAQ) issued “an update on the progress of its upifitamab rilsodotin (UpRi) clinical development strategy and reported positive interim data from the ovarian cancer expansion cohort of the Phase 1 study.”

H.C. Wainwright explained that UpRi, a first-in-class Dolaflexin ADC targeting NaPi2b, is the lead product candidate in Mersana’s pipeline which is being developed to target ovarian cancer and non-small cell lung cancer (NSCLC) adenocarcinoma. The analyst noted that UpRi has been shown to be well tolerated in clinical studies and has demonstrated consistent antitumor activity including patients who have undergone previous PARPi and Avastin (bevacizumab) treatment.

In an expansion cohort of the UpRi study, low, intermediate, and high doses ranging from 36mg/m2 to 43mg/m2 were administered. The company had previously reported data for 72 patients evaluable for safety and 47 patients evaluable for RECIST response in January 2021.

The company achieved an objective response rate (ORR) of 32%, a disease control rate (DCR) of 74% in the higher NaPi2b population, which showed a median duration of response estimated at 5 months. In the overall population the ORR was 28% and the DCR was 68%.

H.C. Wainwright pointed out that enrollment in the ovarian cancer expansion cohort is complete having signed on 97 patients, 75 of whom are considered as RECIST-evaluable at this interim analysis. The analyst stated that recent data announced September 10, 2021, demonstrated a 34% confirmed ORR and an 87% DCR in the high NaPi2b population.

The analyst stated that safety data continues to look promising as patients who were given the lower dose of 36mg/m2 experienced fewer >=Grade 3 adverse events. Importantly, none of the patients in the low dose group reached >=Grade 3 fatigue levels, whereas 13% of the intermediate dose group and 23% of the higher dose group reported >=Grade 3 fatigue. In addition, no patients in either the low or intermediate dose groups had >=Grade 3 pneumonitis, while 10% of the high dose patients had >=Grade 3 pneumonitis.

The report indicated that the UPLIFT study is now underway with a lower dose single-arm registration in treating platinum-resistant ovarian cancer. The company used feedback it received from the FDA to design the study, which is to serve as a basis for a potential later submission to the FDA for accelerated approval.

According to the analyst, “the UPLIFT study is enrolling patients with platinum-resistant, high-grade serous ovarian, fallopian tube, and primary peritoneal cancer with up to four prior lines of therapy and Mersana expects to enroll about 100 patients with high NaPi2b expression and up to 180 patients overall.”

The report mentioned that Mersana had not previously offered enrollment guidance for UPLIFT study but now anticipates that substantial enrollment will occur by summer of 2022.

H.C. Wainwright commented that perhaps the modifications made to reduce the dosage might play a small role in accelerating enrollment and may aid in the overall success of the UPLIFT study. Patients enrolled in the trial will be observed for a period of 6 to 8 months and as the trial progresses more information on the timing and data from study will be released. H.C. Wainwright highlighted that it estimates that UpRi will launch commercially in 2024 with $22 million in sales increasing to $809 million in 2030.

The report stated that Mersana has announced plans for kicking off a new Phase 3 UPNEXT study for the purpose of evaluating UpRi monotherapy in the maintenance setting in platinum-sensitive recurrent ovarian cancer versus a placebo control group. The primary established endpoint in the study has been designated as progression free survival. If things go as planned and on schedule, the study’s protocol and design could be revealed prior to YE/21, and the study could commence in 2022.

The company remains hopeful that the UPNEXT clinical trial could offer confirmatory support of the UPLIFT study and thus help promote accelerated approval that may be used for global registration support.

H.C. Wainwright presently rates Mersana Therapeutics as a “Buy” with a target price of $28.00/share. The firm indicated that it arrived at the $28 per share price by employing net present value calculations utilizing a 20% discount rate to 2030 revenue forecasts of $809 million for UpRi for ovarian cancer and $773 million for XMT-1592 in NSCLC.

The company’s shares trade on the Nasdaq exchange under the symbol “MRSN” and last closed for trading at $9.90/share on September 13, 2021.

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1) Stephen Hytha compiled this article for Streetwise Reports LLC and provides services to Streetwise Reports as an independent contractor. He or members of his household own securities of the following companies mentioned in the article: None. He or members of his household are paid by the following companies mentioned in this article: None.

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Disclosures from HC Wainwright, Initiating Coverage, Sep. 10, 2021

This material is confidential and intended for use by Institutional Accounts as defined in FINRA Rule 4512(c). It may also be privileged or otherwise protected by work product immunity or other legal rules. If you have received it by mistake, please let us know by e-mail reply to [email protected] and delete it from your system; you may not copy this message or disclose its contents to anyone. The integrity and security of this message cannot be guaranteed on the Internet.

H.C. Wainwright & Co, LLC (the “Firm”) is a member of FINRA and SIPC and a registered U.S. Broker-Dealer.

I, Edward White , certify that 1) all of the views expressed in this report accurately reflect my personal views about any and all subject securities or issuers discussed; and 2) no part of my compensation was, is, or will be directly or indirectly related to the specific recommendation or views expressed in this research report; and 3) neither myself nor any members of my household is an officer, director or advisory board member of these companies.

None of the research analysts or the research analyst’s household has a financial interest in the securities of Mersana Therapeutics, Inc. (including, without limitation, any option, right, warrant, future, long or short position).

As of August 31, 2021 neither the Firm nor its affiliates beneficially own 1% or more of any class of common equity securities of Mersana Therapeutics, Inc.

Neither the research analyst nor the Firm knows or has reason to know of any other material conflict of interest at the time of publication of this research report.

The research analyst principally responsible for preparation of the report does not receive compensation that is based upon any specific investment banking services or transaction but is compensated based on factors including total revenue and profitability of the Firm, a substantial portion of which is derived from investment banking services.

The Firm or its affiliates did not receive compensation from Mersana Therapeutics, Inc. for investment banking services within twelve months before, but will seek compensation from the companies mentioned in this report for investment banking services within three months following publication of the research report.

The Firm does not make a market in Mersana Therapeutics, Inc. as of the date of this research report.

The securities of the company discussed in this report may be unsuitable for investors depending on their specific investment objectives and financial position. Past performance is no guarantee of future results. This report is offered for informational purposes only, and does not constitute an offer or solicitation to buy or sell any securities discussed herein in any jurisdiction where such would be prohibited. This research report is not intended to provide tax advice or to be used to provide tax advice to any person. Electronic versions of H.C. Wainwright & Co., LLC research reports are made available to all clients simultaneously.

H.C. Wainwright & Co., LLC does not provide individually tailored investment advice in research reports. This research report is not intended to provide personal investment advice and it does not take into account the specific investment objectives, financial situation and the particular needs of any specific person. Investors should seek financial advice regarding the appropriateness of investing in financial instruments and implementing investment strategies discussed or recommended in this research report.

H.C. Wainwright & Co., LLC’s and its affiliates’ salespeople, traders, and other professionals may provide oral or written market commentary or trading strategies that reflect opinions that are contrary to the opinions expressed in this research report.

H.C. Wainwright & Co., LLC and its affiliates, officers, directors, and employees, excluding its analysts, will from time to time have long or short positions in, act as principal in, and buy or sell, the securities or derivatives (including options and warrants) thereof of covered companies referred to in this research report.

The information contained herein is based on sources which we believe to be reliable but is not guaranteed by us as being accurate and does not purport to be a complete statement or summary of the available data on the company, industry or security discussed in the report. All opinions and estimates included in this report constitute the analyst’s judgment as of the date of this report and are subject to change without notice.

Securities and other financial instruments discussed in this research report: may lose value; are not insured by the Federal Deposit Insurance Corporation; and are subject to investment risks, including possible loss of the principal amount invested.

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