Larimar Therapeutics Reports Positive Topline Phase 1 Clinical Trial Data Showing Dose-Dependent Increases in Frataxin Levels in Patients with Friedreich’s Ataxia
Larimar Therapeutics announced promising results from its Phase 1 clinical trial of CTI-1601, aimed at treating Friedreich's ataxia. The study demonstrated that daily subcutaneous injections over 13 days significantly increased frataxin levels in various tissues compared to placebo, achieving levels similar to healthy carriers. Safety data indicated that CTI-1601 was well tolerated without serious adverse events. The company plans future trials, including a pediatric study. This breakthrough could address critical unmet needs in FA treatment.
- CTI-1601 showed dose-dependent increases in frataxin levels in all evaluated tissues, including buccal cells, skin biopsies, and platelets.
- Frataxin levels achieved were comparable to or exceeded those in phenotypically normal heterozygous carriers.
- No serious adverse events were reported, and CTI-1601 was well tolerated at doses up to 100 mg.
- None.
- Data demonstrate proof-of-concept by showing that daily subcutaneous injections of CTI-1601 for up to 13 days resulted in dose-dependent increases in frataxin levels from baseline compared to placebo in all evaluated tissues
- Data show that frataxin levels achieved in peripheral tissues (buccal cells) following daily 50 mg and 100 mg subcutaneous injections of CTI-1601 were at or in excess of those that would be expected in phenotypically normal heterozygous carriers
- Safety data indicate that repeated subcutaneous injections of CTI-1601 were generally well tolerated at doses up to 100 mg administered daily for 13 days
- Company management to host webcast and conference call today at 8:00 a.m. ET
BALA CYNWYD, Pa., May 11, 2021 (GLOBE NEWSWIRE) -- Larimar Therapeutics, Inc. (“Larimar”) (Nasdaq: LRMR), a clinical-stage biotechnology company focused on developing treatments for Friedreich’s ataxia (FA) and other complex rare diseases, today announced topline data from its Phase 1 multiple ascending dose (MAD) clinical trial (n=27) evaluating CTI-1601 as a treatment for FA.
FA patients participating in the trial received subcutaneous injections of CTI-1601 or placebo at increasing dose levels and frequencies over a 13-day period. Patients in Cohort 1 were dosed with 25 mg of CTI-1601 or placebo daily for four days, and then every third day until Day 13. Cohort 2 patients were dosed with 50 mg of CTI-1601 or placebo daily for seven days, and then once every other day until Day 13. Patients in Cohort 3 received daily injections of 100 mg CTI-1601 or placebo for thirteen days.
Data show that repeated subcutaneous administration of CTI-1601 resulted in dose-dependent increases in frataxin (FXN) levels from baseline compared to placebo controls. These dose-dependent increases in frataxin levels were seen in all evaluated tissues (buccal cells, skin biopsies, and platelets) with daily dosing. The median change from baseline in frataxin levels observed for each dosing group and tissue are shown in the table below.
| FXN Change from Baseline in Buccal Cells Units: pg FXN / μg total protein Data presented as: n median (25th percentile, 75th percentile) | ||||||||||
| Dose Group | Day 4/7* | Day 13 | ||||||||
| Placebo (n=7) | -0.03 | (-0.18, 0.97 | ) | 0.35 | (-0.02, 0.46 | ) | ||||
| Cohort 1 Active (25 mg, n=6) | 0.39 | (0.01, 0.72 | ) | 0.92 | (0.48, 0.94 | ) | ||||
| Cohort 2 Active (50 mg, n=6) | 1.28 | (1.09, 1.69 | ) | 0.39 | (0.35, 1.08 | ) | ||||
| Cohort 3 Active (100 mg, n=7) | 3.06 | (1.70, 4.16 | ) | 2.64 | (1.93, 3.99 | ) | ||||
| FXN Change from Baseline in Skin Biopsies# Units: pg FXN / μg total protein Data presented as: median (25th percentile, 75th percentile) | ||||||||||
| Dose Group | Day 4/7* | Day 13 | ||||||||
| Placebo (n=7) | N/A | 0.92 | (0.10, 1.17 | ) | ||||||
| Cohort 1 Active (25 mg, n=6) | N/A | 0.87 | (-0.07, 1.69 | ) | ||||||
| Cohort 2 Active (50 mg, n=6) | N/A | 2.82 | (1.93, 4.01 | ) | ||||||
| Cohort 3 Active (100 mg, n=7) | N/A | 10.6 | (7.20, 18.1 | ) | ||||||
| FXN Change from Baseline in Platelets Units: pg FXN / μg total protein Data presented as: median (25th percentile, 75th percentile) | ||||||||||
| Dose Group | Day 4/7* | Day 13 | ||||||||
| Placebo (n=7) | -0.38 | (-1.23, 0.60 | ) | -0.65 | (-1.71, 1.03 | ) | ||||
| Cohort 1 Active (25 mg, n=6) | -0.15 | (-2.18, 0.60 | ) | -0.53 | (-1.01, 0.80 | ) | ||||
| Cohort 2 Active (50 mg, n=6) | 0.30 | (-0.18, 0.75 | ) | -0.87 | (-1.14, -0.70 | ) | ||||
| Cohort 3 Active (100 mg, n=7) | 2.54 | (2.27, 2.70 | ) | 3.55 | (2.71, 4.93 | ) | ||||
*FXN levels from Day 4 and 13 measurements are shown for data derived from Cohort 1. FXN levels from Day 7 and 13 measurements are shown for data derived from Cohorts 2 and 3. Sample collection days varied in each cohort per the clinical trial protocol.
#Skin biopsies were not collected on Day 4 or Day 7 per the clinical trial protocol. Skin biopsies were optional per the protocol and were collected in 5 of the 7 patients in Cohort 3.
“The ability of CTI-1601 to elevate frataxin in the evaluated tissues strongly supports its continued clinical evaluation, as frataxin levels in buccal cells and blood have been shown to be associated with disease severity in FA patients,” said Nancy M. Ruiz, MD, Chief Medical Officer of Larimar. “Notably, daily subcutaneous CTI-1601 administration resulted in median frataxin levels in buccal cells that are similar to, and even exceed, the levels we would expect to see in phenotypically normal heterozygous carriers (who have frataxin levels that are approximately
Safety data from the trial indicate that repeated subcutaneous injections of CTI-1601 were generally well tolerated at doses up to 100 mg administered daily for 13 days. A summary of the safety data, as well as pharmacokinetic data are shown below.
Safety:
- No serious adverse events (SAEs), important medical events, or treatment-related severe adverse events were reported in the trial
- The most common adverse events were mild and moderate injection site reactions (at least one injection site reaction was seen in
43% of placebo patients and in100% of CTI-1601 patients) - The number and severity of adverse events did not increase with increasing exposure to CTI-1601
- Of the 27 patients dosed, 26 completed the trial with one Cohort 2 patient receiving CTI-1601 withdrawing after experiencing mild to moderate nausea and vomiting
Pharmacokinetics:
- CTI-1601 was quickly absorbed after subcutaneous administration
- Dose-proportional increases in exposure were observed with increasing doses of CTI-1601
- The mean half-life of CTI-1601 in plasma was approximately 11 hours
Patients who completed the single ascending dose (SAD) and/or MAD clinical trials are eligible to screen for an open-label extension clinical trial, the Jive study, which Larimar expects to initiate in the second half of 2021. Larimar also expects to initiate a MAD clinical trial in patients under 18 years of age in the second half of 2021. Patients completing this pediatric trial will also be eligible to screen for the Jive study.
Carole Ben-Maimon, MD, President and Chief Executive Officer of Larimar, commented, “We are thrilled with these data, which demonstrate proof-of-concept for CTI-1601 and highlight its safety and tolerability profile. Our ability to generate these results amid the pandemic speaks to the commitment of the patients who participated in the trials and the broader FA community. It is also a testament to the great work being done by the Friedreich’s Ataxia Research Alliance and the talent of our employees, partners, and investigators. We extend our sincerest thanks to all of these individuals for the important roles they have played in CTI-1601’s clinical development to date. We look forward to sharing additional quantitative analyses from our Phase 1 clinical trials at a future scientific meeting. We anticipate this data will inform the design of our planned future clinical trials for CTI-1601.”
Conference Call and Webcast
Larimar will host a conference call and webcast today, May 11, 2021 at 8:00 a.m. ET. To access the webcast, please visit this link to the event. To participate by phone please dial 855-327-6837 (domestic) or 631-891-4304 (international) and refer to conference ID 10014696. Following the live event, the archived webcast will be available for 90 days.
About the Phase 1 MAD Clinical Trial
The Phase 1 MAD clinical trial was a double-blind, placebo-controlled, randomized clinical trial designed to assess the safety of subcutaneously administered CTI-1601 versus placebo in adult subjects with FA. The primary objective was to assess the safety and tolerability of multiple ascending doses of CTI-1601 in subjects with FA. Key secondary endpoints included pharmacokinetic and pharmacodynamic analyses following increasing multiple doses of subcutaneously administered CTI-1601. Patients from the MAD clinical trial are eligible to screen for an open-label extension trial that Larimar expects to initiate in the second half of 2021.
About CTI-1601
CTI-1601 is a recombinant fusion protein intended to deliver human frataxin into the mitochondria of patients with Friedreich’s ataxia who are unable to produce enough of this essential protein. Currently in Phase 1 clinical trials in the U.S., CTI-1601 has been granted Rare Pediatric Disease designation, Fast Track designation and Orphan Drug designation by the U.S. Food and Drug Administration (FDA) and orphan drug designation by the European Commission.
About Larimar Therapeutics
Larimar Therapeutics, Inc. (Nasdaq: LRMR), is a clinical-stage biotechnology company focused on developing treatments for complex rare diseases. Larimar’s lead compound, CTI-1601, is currently being evaluated in a Phase 1 clinical program in the U.S. as a potential treatment for FA. Larimar also plans to use its intracellular delivery platform to design other fusion proteins to target additional rare diseases characterized by deficiencies in intracellular bioactive compounds. For more information, please visit: https://larimartx.com.
Forward-Looking Statements
This press release contains forward-looking statements that are based on Larimar’s management’s beliefs and assumptions and on information currently available to management. All statements contained in this release other than statements of historical fact are forward-looking statements, including but not limited to statements regarding Larimar’s ability to develop and commercialize CTI-1601 and other planned product candidates, Larimar’s planned research and development efforts, and other matters regarding Larimar’s business strategies, use of capital, results of operations and financial position, and plans and objectives for future operations.
In some cases, you can identify forward-looking statements by the words “may,” “will,” “could,” “would,” “should,” “expect,” “intend,” “plan,” “anticipate,” “believe,” “estimate,” “predict,” “project,” “potential,” “continue,” “ongoing” or the negative of these terms or other comparable terminology, although not all forward-looking statements contain these words. These statements involve risks, uncertainties and other factors that may cause actual results, performance or achievements to be materially different from the information expressed or implied by these forward-looking statements. These risks, uncertainties and other factors include, among others, the success, cost and timing of Larimar’s product development activities, non-clinical studies and clinical trials, including CTI-1601 clinical milestones; that clinical trial results may differ from final clinical trial results, that earlier non-clinical and clinical data and testing of CTI-1601 may not be predictive of the results or success of clinical trials, and assessments; the ongoing impact of the COVID-19 pandemic on Larimar’s future clinical trials, manufacturing, regulatory and nonclinical study timelines, ability to raise additional capital and general economic conditions; Larimar’s ability to optimize and scale CTI-1601’s manufacturing process; Larimar’s ability to obtain regulatory approval for CTI-1601 and future product candidates; Larimar’s ability to develop sales and marketing capabilities, whether alone or with potential future collaborators, and to successfully commercialize any approved product candidates; Larimar’s ability to raise the necessary capital to conduct its product development activities; and other risks described in the filings made by the Larimar with the Securities and Exchange Commission (SEC), including but not limited to Larimar’s periodic reports, including the annual report on Form 10-K, quarterly reports on Form 10-Q and current reports on Form 8-K, filed with or furnished to the SEC and available at www.sec.gov. These forward-looking statements are based on a combination of facts and factors currently known by Larimar and its projections of the future, about which it cannot be certain. As a result, the forward-looking statements may not prove to be accurate. The forward-looking statements in this press release represent views as of the date hereof. Larimar undertakes no obligation to update any forward-looking statements for any reason, except as required by law.
| Investor Contact: | Company Contact: |
| Joyce Allaire | Michael Celano |
| LifeSci Advisors | Chief Financial Officer |
| jallaire@lifesciadvisors.com | mcelano@larimartx.com |
| (212) 915-2569 | (484) 414-2715 |
FAQ
What were the results of Larimar's Phase 1 clinical trial for CTI-1601?
What safety data was reported for CTI-1601?
What are the next steps for Larimar regarding CTI-1601?
What is the significance of frataxin levels in Friedreich's ataxia patients?
When is the conference call regarding the CTI-1601 trial results?
