Pseudobulbar Palsy

TPN-101 is the first PSP treatment to reduce NfL and IL-6 levels, key biomarkers of neurodegeneration and neuroinflammation in PSP Participants treated with TPN-101 for the entire 48-week study in PSP showed a stabilization of their clinical symptoms as measured by the PSPRS In the Phase 2 study of C9orf72-related ALS/FTD, TPN-101 showed effects on key biomarkers of neurodegeneration, neuroinflammation and microglial activation, including NfL, Tau, UCHL1, YKL-40 and osteopontin TPN-101 also showed a clinical effect on Vital Capacity, an objective respiratory measure that correlates with mortality in patients with ALS Transposon plans to advance TPN-101 to a Phase 3 registration study for PSP and is expanding the development of TPN-101 into Alzheimer's disease SAN DIEGO, Feb. 12, 2024 /PRNewswire/ -- Transposon Therapeutics, a biotechnology company developing a platform of novel, orally administered therapies for the treatment of neurodegenerative and aging-related diseases including Alzheimer's disease, today announced final results from its Phase 2 study of TPN-101 for the treatment of progressive supranuclear palsy (PSP). The company also announced interim results from its Phase 2 study of TPN-101 in patients with amyotrophic lateral sclerosis (ALS) and/or frontotemporal dementia (FTD) related to hexanucleotide repeat expansion in the C9orf72 gene (C9orf72-related ALS/FTD). Transposon will present final results from its Phase 2 study in PSP in a poster presentation at the hybrid AD/PD™ 2024: 18th International Conference on Alzheimer's and Parkinson's Diseases. The meeting will take place online and in Lisbon, Portugal, from March 5-9, 2024. Final Phase 2 PSP Study Results Final 48-week results from the Phase 2 study in PSP confirm and extend the 24-week interim results that showed TPN-101 is the first treatment for PSP to reduce levels of neurofilament light chain (NfL), a key biomarker of neurodegeneration in tauopathies such as PSP and Alzheimer's disease. Participants treated with placebo from weeks 1 to 24 and then switched to 400 mg TPN-101 at week 24 experienced a reduction of NfL in the cerebrospinal fluid (CSF) from weeks 24 to 48 that was similar to that observed in the group of participants receiving the 400 mg dose from weeks 1 to 24. Participants treated with 400 mg TPN-101 for the entire 48-week treatment period showed no increase of NfL levels in the CSF from weeks 1 to 48. In contrast, NfL levels in the CSF are reported to increase by 9-18% annually in natural history studies of PSP. The 48-week results also showed further dose-related reductions in interleukin 6 (IL-6) cytokine levels, as well as reductions in levels of osteopontin. IL-6 is a biomarker of neuroinflammation that is elevated in PSP and correlates with disease progression and severity. Osteopontin levels correlate with cognitive deficit in Alzheimer's disease patients and lowering of osteopontin may predict cognitive improvement. Participants treated with TPN-101 for the entire 48-week trial duration showed a stabilization of their clinical symptoms as measured by the PSP Rating Scale (PSPRS) between weeks 24 and 48. In contrast, participants who had been on placebo from weeks 1 to 24 continued to show a worsening of the PSPRS between weeks 24 and 48, suggesting a delay of clinical benefit onset of at least 24 weeks after start of drug treatment, and lagging behind the early effects on biomarkers seen in weeks 1 to 24. "There are no effective treatments for PSP, a uniformly fatal disease that is similarly prevalent to ALS," said Adam Boxer, M.D., Ph.D., Endowed Professor in Memory and Aging in the Department of Neurology at the University of California, San Francisco and principal investigator in the Phase 2 study of TPN-101 for PSP. "The effects of TPN-101 on CSF NfL concentrations, as well as other exploratory CSF biomarkers, have not previously been observed in any PSP trial and support further investigation of clinical treatment effects in a larger study." Interim Phase 2 C9orf72-Related ALS/FTD Study Results Results from the pre-defined interim analysis of the Phase 2 study in C9orf72-related ALS/FTD demonstrated the impact of TPN-101 treatment on key biomarkers of neurodegeneration, neuroinflammation, and microglial activation including NfL, tau, UCHL1, YKL-40, and osteopontin from baseline to 24 weeks. The data also showed a clinical effect on Vital Capacity, an objective respiratory measure that correlates with mortality in patients with ALS. Notably, C9orf72-related ALS/FTD is a TDP-43 protein pathology associated with nuclear displacement of TDP-43 in the central nervous system. TDP-43 pathology also occurs in about 50% of patients with Alzheimer's disease. "Transposon's founding mission was to establish human proof-of-concept that dysregulation of retrotransposable elements in neurodegenerative diseases such as PSP, ALS and Alzheimer's disease can be addressed with a new class of LINE-1 reverse transcriptase inhibitors," stated Eckard Weber, M.D., Founder and Chief Innovation Officer of Transposon. "The results obtained with TPN-101 in both PSP and ALS/FTD show for the first time that neurodegenerative diseases that involve LINE-1 dysregulation are treatable with a specific inhibitor of this important novel target. We look forward to advancing the development of TPN-101 into registration studies to address this devastating and rapidly growing disease category." "Given the large unmet needs in PSP and ALS, these promising results highlight the therapeutic potential of TPN-101 for both disorders," added Murali Doraiswamy, MBBS, FRCP, Professor of Psychiatry and Geriatrics at Duke University and chair of Transposon's clinical advisory board. "These data also provide key validation of targeting LINE-1 to treat other tauopathies such as Alzheimer's disease." "Based on the groundbreaking study results shown by TPN-101 in both PSP and ALS/FTD, we plan to rapidly advance TPN-101 into a Phase 3 registration study for the treatment of PSP, and potentially ALS/FTD as well, pending final confirmatory study results," said Dennis Podlesak, Chairman and Chief Executive Officer of Transposon. "Importantly, the totality of the results across both studies also provides compelling scientific rationale for targeting LINE-1 to treat Alzheimer's disease. Based on these findings, we are expanding our development efforts into Alzheimer's disease with the goal of bringing a novel drug treatment to patients that remain in dire need of an effective new therapeutic option." About AD/PD 2024 The hybrid AD/PD 2024: 18th International Conference on Alzheimer's and Parkinson's Diseases will take place online and in Lisbon, Portugal, from March 5-9, 2024. Transposon will present final results from its Phase 2 study in PSP in a poster presentation (abstract #433) at AD/PD 2024 entitled: "A Phase 2a Study of TPN-101, a Nucleoside Reverse Transcriptase Inhibitor, in Patients with Progressive Supranuclear Palsy." For more information, please visit the AD/PD 2024 website. About the Phase 2 Study in PSP The Phase 2 study in PSP is a multi-center, randomized, double-blind, placebo-controlled, parallel-group, 4-arm study with an open-label treatment phase in patients with PSP. Participants (n=42) were randomized to receive daily doses of 100 mg, 200 mg or 400 mg of TPN-101, or placebo. The study includes a 6-week screening period, a 24-week double-blind treatment period, a 24-week open label treatment period, and a follow-up visit 4 weeks post-treatment. All phases of the study, including the 24-week open label treatment period, have been completed. Further information on the study can be accessed at ClinicalTrials.gov. About the Phase 2 Study in C9orf72-related ALS/FTD The Phase 2 study in C9orf72-related ALS/FTD is multi-center, randomized, double-blind, placebo-controlled parallel-group, 2-arm study with an open-label treatment phase in patients with C9orf72-related ALS and/or FTD. Participants (n=42) were randomized to receive daily doses of 400 mg of TPN-101 or placebo. Similar to the Phase 2 study in PSP, this study includes a 6-week screening period, a 24-week double-blind treatment period, a 24-week open-label treatment period, and a follow-up visit 4 weeks post-treatment. The predefined interim analysis was performed after all patients completed the 24-week double-blind portion of the study. The open-label extension of the study is ongoing, with subjects and investigators blinded to the original treatment assignment. Further information on the study can be accessed at ClinicalTrials.gov. About TPN-101 TPN-101 specifically inhibits the LINE-1 reverse transcriptase that promotes LINE-1 replication. LINE-1 elements are a class of retrotransposable elements that in humans are uniquely capable of replicating and moving to new locations within the genome. When this process becomes dysregulated, LINE-1 reverse transcriptase drives overproduction of LINE-1 DNA, triggering innate immune responses that contribute to neurodegenerative, autoimmune and aging-related disease pathology. About PSP PSP is a rare and fatal tauopathy with no approved treatment options. PSP mainly affects people in their mid- to late-60s and is characterized by early postural instability and falls, vertical gaze palsy, akinesia, rigidity, pseudobulbar palsy, and frontal dysfunction with cognitive and behavioral changes. The mean survival for individuals with PSP is 6 to 7 years. About ALS and FTD ALS is a neurodegenerative disease characterized by progressive muscle weakness, loss of ability to speak, eat, move or breathe. FTD is a progressive frontal / temporal cortex disease associated with behavior and personality changes, emotional problems, and difficulty walking, communicating or working. With onset commonly in middle age or earlier, patients with ALS have a mean survival of only 3 years. Patients with FTD have a mean survival of 9 years. About Transposon Transposon Therapeutics, Inc. is a clinical-stage biopharmaceutical company developing a platform of novel therapies for the treatment of neurodegenerative and aging-related diseases, including Alzheimer's disease. The company's lead clinical compound, TPN-101, is first-in-class to address LINE-1 reverse transcriptase for treating neurodegenerative and autoimmune diseases. The company also has a discovery platform supporting a deep pipeline of novel therapies to address additional indications. Dr. Doraiswamy chairs the company's clinical advisory board and has received compensation/stock options for his role. Contact: Rick Orr Transposon Therapeutics, Inc. (858) 535-4821 rorr@transposonrx.com View original content to download multimedia: SOURCE Transposon Therapeutics

24-Week data show TPN-101 is the first treatment for PSP to reduce NfL levels, a key biomarker of neurodegeneration in tauopathies such as PSP and Alzheimer's disease TPN-101 also showed a reduction in IL-6 cytokine levels, a biomarker of neuroinflammation that is elevated in PSP patients and correlates with disease severity Once-daily oral dosing of TPN-101 was well-tolerated by patients with PSP Transposon to report data from three Phase 2 clinical studies of TPN-101 in four disorders, including PSP, amyotrophic lateral sclerosis, frontotemporal dementia, and Aicardi-Goutières Syndrome, in Q1 2024 SAN DIEGO, Nov. 14, 2023 /PRNewswire/ -- Transposon Therapeutics, a biotechnology company developing a platform of novel, orally administered therapies for the treatment of neurodegenerative and aging-related diseases, today announced its abstract of interim results from its Phase 2 study of TPN-101 for the treatment of progressive supranuclear palsy (PSP) has been accepted for poster presentation at the hybrid AD/PD™ 2024: 18th International Conference on Alzheimer's and Parkinson's Diseases. The meeting will take place online and in Lisbon, Portugal, from March 5-9, 2024. The poster presentation will highlight results from the study's predefined interim analysis, which examined the change from baseline to 24 weeks in biomarkers of neurodegeneration and neuroinflammation, including neurofilament light chain (NfL) and interleukin 6 (IL-6) levels in cerebrospinal fluid (CSF). In the treatment group receiving 400 mg of TPN-101 once daily for 24 weeks, TPN-101 showed an 18.4% reduction in NfL levels in CSF as compared to placebo. NfL is a biomarker of neurodegeneration that correlates with disease severity and progression in PSP. In the same 400 mg treatment group, TPN-101 also resulted in a 51.6% reduction in IL-6 levels in CSF as compared to placebo. IL-6 is a biomarker of neuroinflammation that is elevated in PSP patients and correlates with disease severity. Once-daily oral dosing of TPN-101 was well-tolerated at all dose levels. "No previously tested drug has shown an effect on NfL levels in patients with PSP, a progressive neurological disorder with no approved treatment options to stop or even slow progression of the disease," said Andrew Satlin, M.D., Chief Medical Officer at Transposon. "The lowering of CSF NfL levels seen in this interim analysis provides biomarker evidence of a treatment effect on neurodegeneration. We are excited about the potential of TPN-101 as a much-needed treatment option for patients with PSP. In addition, we believe these findings open the door to an entirely new therapeutic approach to treating Alzheimer's and other neurodegenerative diseases." "The Transposon team continues to make excellent progress against our key development milestones and corporate priorities, and we look forward to presenting these interim results from our PSP program at the AD/PD 2024 International Conference on Alzheimer's and Parkinson's Diseases," said Dennis Podlesak, Chairman and Chief Executive Officer of Transposon. "Beyond the promising reduction in NfL levels seen in our PSP study, we also look forward to reporting data from our three ongoing Phase 2 programs of TPN-101 in the first quarter of 2024 and, importantly, to expanding our development efforts for the compound into Alzheimer's disease and other neurodegenerative and autoimmune disorders." Transposon will present results from the interim analysis in a poster presentation (abstract #433) at AD/PD 2024 entitled: "A Phase 2a Study of TPN-101, a Nucleoside Reverse Transcriptase Inhibitor, in Patients with Progressive Supranuclear Palsy." For more information, please visit the AD/PD™ 2024 website. About the Phase 2 study in PSP The Phase 2 study in PSP is a multi-center, randomized, double-blind, placebo-controlled, parallel-group, 4-arm study with an open-label treatment phase in patients with PSP. Patients (N=42) were randomized to receive daily doses of 100 mg, 200 mg or 400 mg of TPN-101, or placebo. The study includes a 6-week screening period, a 24-week double-blind treatment period, a 24-week open label treatment period, and a follow-up visit 4 weeks post treatment. The predefined interim analysis was performed after all patients completed the 24-week double-blind portion of the study. The open-label extension of the study is ongoing. Further information on the study can be accessed at ClinicalTrials.gov. About TPN-101 TPN-101 specifically inhibits the LINE-1 reverse transcriptase that promotes LINE-1 replication. LINE-1 elements are a class of retrotransposable elements that in humans are uniquely capable of replicating and moving to new locations within the genome. When this process becomes dysregulated, LINE-1 reverse transcriptase drives overproduction of LINE-1 DNA, triggering innate immune responses that contribute to neurodegenerative, autoimmune and aging-related disease pathology. About PSP PSP is a rare and fatal tauopathy with no approved treatment options. PSP mainly affects people in their mid-to late-60s and is characterized by early postural instability and falls, vertical gaze palsy, akinesia, rigidity, pseudobulbar palsy, and frontal dysfunction with cognitive and behavioral changes. The mean survival for individuals with PSP is 6 to 7 years. About Transposon Transposon Therapeutics, Inc. is a clinical-stage biopharmaceutical company developing a platform of novel therapies for the treatment of neurodegenerative and aging-related diseases, including Alzheimer's disease. The company's lead clinical compound, TPN-101, is first-in-class to address LINE-1 reverse transcriptase for treating neurodegenerative and autoimmune diseases. Transposon will report data from three Phase 2 clinical studies of TPN-101 in four disorders, including progressive supranuclear palsy (PSP), amyotrophic lateral sclerosis (ALS), frontotemporal dementia (FTD), and Aicardi-Goutières syndrome (AGS), in Q1 2024. The company also has a discovery platform supporting a deep pipeline of novel therapies to address additional indications. Contact: Rick Orr Transposon Therapeutics, Inc. (858) 535-4821 [email protected] SOURCE Transposon Therapeutics