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Alterity Therapeutics Announces Multiple Oral and Poster Presentations to be Featured at the International MSA Congress

1. Alterity will present at the 2025 International MSA Congress in Boston. 2. ATH434 shows promise in slowing Multiple System Atrophy progression. 3. Fast Track Designation granted for ATH434 by the US FDA. 4. Positive Phase 2 trial data of ATH434 indicates significant clinical efficacy. 5. Alterity is dedicated to developing treatments for neurodegenerative diseases.

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Why Bullish?

The positive clinical results for ATH434 enhance investor confidence, similar to previous biotech uptrends following successful trial results.

How important is it?

The article highlights critical advancements in ATH434, likely to influence investor sentiment and stock price positively.

Why Short Term?

The Congress presentations and upcoming discussions could quickly generate investor interest and market activity.

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MELBOURNE, Australia and SAN FRANCISCO, May 07, 2025 (GLOBE NEWSWIRE) -- Alterity Therapeutics (ASX: ATH, NASDAQ: ATHE) (“Alterity” or “the Company”), a biotechnology company dedicated to developing disease modifying treatments for neurodegenerative diseases, today announced that multiple oral and poster presentations related to Alterity’s clinical programs in Multiple System Atrophy (MSA) will be featured at the 2025 International MSA Congress taking place May 9 - 11, 2025 in Boston, MA, USA. The Congress is presented by Mission MSA, a non-profit organization dedicated to improving the quality of life and building hope for people affected by MSA through support services, educational resources, research funding, and community engagement. David Stamler, M.D., Chief Executive Officer of Alterity, commented, “We are excited to play a prominent role at the MSA Congress which brings together a noteworthy group of physicians and scientists as well as patients and care partners, all of whom are focused on advancing MSA research and care. Mission MSA is one of the primary patient education and advocacy organizations for the disease in the U.S., and we are also proud to support the event as a sponsor. We look forward to presenting our double-blind Phase 2 data for ATH434 as well as our bioMUSE natural history study with our colleagues at Vanderbilt University Medical Center. Our clinical advancements in MSA continue to generate significant interest throughout the community, bolstered by the recent Fast Track Designation for ATH434 that was granted by the US FDA.” Type:Oral PresentationSession: Opening Plenary: Toward Disease Modifying Therapies of MSA Title: ATH434 Slowed Disease Progression in a Phase 2 Study in Multiple System AtrophyPresenter:David Stamler, M.D., Chief Executive Officer of AlterityDate/Time:Friday, May 9, 2025 at 9:10 AM EDT (USA)  Type:Oral PresentationSession:Biomarkers in MSA: ImagingTitle:MSA Atrophy Index (MSAai): A Quantitative Imaging Marker for Diagnosis and Monitoring of Multiple System AtrophyPresenter:Amy Brown, M.D., M.S., Assistant Professor, Movement Disorders Division, Department of Neurology, Vanderbilt University Medical CenterDate/Time:Saturday, May 10, 2025 at 2:55 PM EDT  Type:Poster SessionTitle:ATH434 Slowed Disease Progression in a Phase 2 Study in Multiple System Atrophy Presenter:David Stamler, M.D., Chief Executive Officer of AlterityDate/Time:Saturday, May 10, 2025 at 12:00 PM EDTPoster:#85  Type:Poster SessionTitle:Cutaneous Phosphorylated Alpha-Synuclein Deposition Informs Autonomic Function in Individuals with Early-Stage Multiple System AtrophyPresenter:Leah Mann, PhD, Postdoctoral Research Fellow, Vanderbilt University Medical CenterDate/Time:Saturday, May 10, 2025 at 12:00 PM EDTPoster:#86 About ATH434 Alterity’s lead candidate, ATH434, is an oral agent designed to inhibit the aggregation of pathological proteins implicated in neurodegeneration. ATH434 has been shown preclinically to reduce α-synuclein pathology and preserve neuronal function by restoring normal iron balance in the brain in preclinical models. As an iron chaperone, it has excellent potential to treat Parkinson’s disease as well as various Parkinsonian disorders such as Multiple System Atrophy (MSA). Phase 1 studies have demonstrated the agent is well tolerated and achieved brain levels comparable to efficacious levels in animal models of MSA. Positive results from the randomized, double-blind, placebo-controlled Phase 2 clinical trial in patients with MSA demonstrated robust clinical efficacy, target engagement on key biomarkers, and a favorable safety profile. A second Phase 2 open-label biomarker trial in patients with more advanced MSA is ongoing. ATH434 has been granted Fast Track Designation by the U.S. FDA, and Orphan Drug Designation by the U.S. FDA and the European Commission for the treatment of MSA. About ATH434-201 Phase 2 Clinical Trial The ATH434-201 Phase 2 clinical trial is a randomized, double-blind, placebo-controlled investigation of 12 months treatment with ATH434 in patients with MSA. The study evaluated the efficacy, safety and pharmacokinetics of ATH434 as well as the effect of ATH434 on neuroimaging and protein biomarkers. Wearable sensors were employed to evaluate motor activities outside of the clinic. The study enrolled 77 adults who were randomly assigned to receive ATH434 50 mg or 75 mg twice daily or matching placebo. The data showed that, compared to placebo, ATH434 produced clinically and statistically significant improvement on the modified Unified Multiple System Atrophy Rating Scale (UMSARS) Part I, a functional rating scale that assesses disability on activities of daily living affected in MSA. Additional efficacy assessments demonstrated improvement consistent with the positive UMSARS Part I findings including trends in improved motor performance on the Parkinson’s Plus rating scale, the Clinical Global Impression of Severity Scale, and the Orthostatic Hypotension Symptom Assessment (a patient reported outcome). Wearable sensor data indicated that ATH434 also led to increased activity in an outpatient setting. Biomarkers were used to evaluate potential drug effect and target engagement relative to placebo. Both dose levels stabilized or reduced iron accumulation in MSA affected brain regions with trends in preservation of brain volume. ATH434 was well tolerated with similar adverse event rates compared to placebo and no serious adverse events attributed to ATH434. Additional information on the Phase 2 trial can be found by ClinicalTrials.gov Identifier: NCT05109091. About bioMUSE Biomarkers of progression in Multiple System Atrophy (bioMUSE) is a natural history study that aims to track the progression of individuals with MSA, a Parkinsonian disorder without approved therapy. The study is being conducted in collaboration with Vanderbilt University Medical Center in the U.S. under the direction of Daniel Claassen, M.D., M.S., Professor of Neurology and Principal Investigator. Natural history studies are important for characterizing disease progression in selected patient populations. The study has provided rich data for optimizing the design of Alterity’s randomized ATH434-201 Phase 2 clinical trial and enrolled approximately 20 individuals with clinically probable or clinically established MSA. BioMUSE continues to provide vital information on early stage MSA patients, informs the selection of biomarkers suitable to evaluate target engagement and preliminary efficacy, and delivers clinical data to characterize disease progression in a patient population that mirrors those currently enrolling in the Phase 2 clinical trial.  About Multiple System Atrophy Multiple System Atrophy (MSA) is a rare, neurodegenerative disease characterized by failure of the autonomic nervous system and impaired movement. The symptoms reflect the progressive loss of function and death of different types of nerve cells in the brain and spinal cord. It is a rapidly progressive disease and causes profound disability. MSA is a Parkinsonian disorder characterized by a variable combination of slowed movement and/or rigidity, autonomic instability that affects involuntary functions such as blood pressure maintenance and bladder control, and impaired balance and/or coordination that predisposes to falls. A pathological hallmark of MSA is the accumulation of the protein α-synuclein within glia, the support cells of the central nervous system, and neuron loss in multiple brain regions. MSA affects at least 15,000 individuals in the U.S., and while some of the symptoms of MSA can be treated with medications, currently there are no drugs that are able to slow disease progression and there is no cure.1 1Multiple System Atrophy | National Institute of Neurological Disorders and Stroke (nih.gov) About Alterity Therapeutics Limited Alterity Therapeutics is a clinical stage biotechnology company dedicated to creating an alternate future for people living with neurodegenerative diseases. The Company is initially focused on developing disease modifying therapies in Parkinson’s disease and related disorders. Alterity recently reported positive data for its lead asset, ATH434, in a Phase 2 clinical trial in participants with Multiple System Atrophy (MSA), a rare and rapidly progressive Parkinsonian disorder. ATH434 is also being evaluated in a Phase 2 clinical trial in advanced MSA. In addition, Alterity has a broad drug discovery platform generating patentable chemical compounds to treat the underlying pathology of neurological diseases. The Company is based in Melbourne, Australia, and San Francisco, California, USA. For further information please visit the Company’s website at www.alteritytherapeutics.com. Authorisation & Additional informationThis announcement was authorized by David Stamler, CEO of Alterity Therapeutics Limited. Investor and Media Contacts: Australia Millie MacdonaldHead of Investor Relations and Business Developmentmmacdonald@alteritytherapeutics.com +61 468 304 742 Ana Luiza Harropwe-aualteritytherapeutics@we-worldwide.com+61 452 510 255 U.S.Remy Bernardaremy.bernarda@iradvisory.com +1 (415) 203-6386 Forward Looking Statements This press release contains "forward-looking statements" within the meaning of section 27A of the Securities Act of 1933 and section 21E of the Securities Exchange Act of 1934. The Company has tried to identify such forward-looking statements by use of such words as "expects," "intends," "hopes," "anticipates," "believes," "could," "may," "evidences" and "estimates," and other similar expressions, but these words are not the exclusive means of identifying such statements. Important factors that could cause actual results to differ materially from those indicated by such forward-looking statements are described in the sections titled “Risk Factors” in the Company’s filings with the SEC, including its most recent Annual Report on Form 20-F as well as reports on Form 6-K, including, but not limited to the following: statements relating to the Company's drug development program, including, but not limited to the initiation, progress and outcomes of clinical trials of the Company's drug development program, including, but not limited to, ATH434, and any other statements that are not historical facts. Such statements involve risks and uncertainties, including, but not limited to, those risks and uncertainties relating to the difficulties or delays in financing, development, testing, regulatory approval, production and marketing of the Company’s drug components, including, but not limited to, ATH434, the ability of the Company to procure additional future sources of financing, unexpected adverse side effects or inadequate therapeutic efficacy of the Company's drug compounds, including, but not limited to, ATH434, that could slow or prevent products coming to market, the uncertainty of obtaining patent protection for the Company's intellectual property or trade secrets, the uncertainty of successfully enforcing the Company’s patent rights and the uncertainty of the Company freedom to operate. Any forward-looking statement made by us in this press release is based only on information currently available to us and speaks only as of the date on which it is made. We undertake no obligation to publicly update any forward-looking statement, whether written or oral, that may be made from time to time, whether as a result of new information, future developments or otherwise.

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