Tyrosinemias

Vivet Therapeutics Presents Three Posters on Cerebrotendinous Xanthomatosis Program and Novel AAV Gene Delivery Platform at European Society of Gene and Cell Therapy Annual Congress 2024 Paris, France, October 22, 2024 – Vivet Therapeutics (“Vivet”), a clinical stage biotech company developing novel and long-lasting gene therapies for rare inherited liver metabolic disorders, today announces the presentation of three posters demonstrating key pre-clinical findings for its gene therapy program, VTX-806 for the treatment of Cerebrotendinous Xanthomatosis (CTX), a study on S/MAR-containing AAV vector integration in hereditary tyrosinemia type I (HT1) and validation of the translational value of the B6.129-Cyp27a1tmlEl t/J CTX mouse model at the European Society for Gene and Cell Therapy (ESGCT) 2024 Congress Rome, Italy from the 22-25 October. Dr Gloria Gonzalez-Aseguinolaza, Co-Founder & Chief Scientific Officer at Vivet Therapeutics, said, “Our findings highlight the potential of our diversified gene therapy pipeline, using our precise, highly engineered, next-generation viral vectors and gene constructs. We are committed to developing long-lasting AAV-based gene therapies for CTX and other rare inherited liver metabolic disorders to ultimately provide more effective treatment options for patients. Dr Jean-Philippe Combal, Co-Founder & Chief Executive Officer at Vivet Therapeutics added, “The existing standard of care (SOC) for CTX is a lifelong treatment using chenodeoxycholic acid which reduces the levels of toxic metabolites but does not 100% prevent neurodegeneration, leaving an unmet medical need. Our preclinical findings for VTX-806 provide further evidence that VTX-806 holds promise for curative treatment for CTX as underlined by our data and the European Orphan Drug Designation received in September of this year. We look forward to presenting further groundbreaking data at upcoming scientific conferences as we drive the program forward.” Poster one entitled “Long-term metabolic, phenotypic, and neuropathological characterization of the Cyp27a1-/- mouse model of cerebrotendinous xanthomatosis,” details the long-term evaluation of B6.129-Cyp27a1tmlEl t/J, a CTX mouse model with full metabolic, phenotypic, histological and neuropathological characterization up to 18 months of age. The study confirmed prior literature in that Cyp27a1-/- mice when compared to their wild-type (WT) littermates, had hepatomegaly, increased levels of plasma ALT, and increased expression of Cyp7a1 and Cyp3a11. Cyp3a11 is a homolog to human CYP3A4, an enzyme that metabolizes large portions of drugs and other foreign objects in the body. At six months of age, Cyp27a1-/- mice presented lower body weight gain and steatosis, alongside elevated toxic bile acid precursors in circulation and in the brain. In addition, Cyp27a1-/- mice presented signs of ataxia, particularly in females, making this study the first to show measurable motor alterations in a mouse model with CTX, like those described in CTX patients, making this a valuable model for translational CTX research. Poster two entitled “S/MAR-Containing AAV Vectors Result in an Increase in AAV Episomes and a Reduction in AAV Integration Sites in a Mouse Model With a High Rate of Hepatocyte Proliferation,” details an S/MAR (scaffold/matrix attachment region) containing AAV vector integration study in an HT1 mouse model (Fah1R Tyrc/RJ). Results showed that the S/MAR-containing AAVs achieved a higher therapeutic effect than the control vector. Surviving mice showed body weight (BW) and serum biomarker (SB) normalization after approximately 50 days post-injection and the number of viral genomes and disease-associated enzyme (Hfah) expression levels were similar across experimental groups. Immunohistochemistry (IHC) also showed FAH expression in clusters of positive hepatocytes in recovered mice, suggesting potential AAV integration and clonal expansion. These results not only indicate the presence of the S/MAR sequence but also suggest the location of the S/MAR sequence within the therapeutic vector, influences the fate of the viral genome in the transduced cell. Poster three entitled “Liver-directed gene therapy normalizes toxic bile acid metabolite levels in the blood and brain of mice with cerebrotendinous xanthomatosis,” details the development and optimization of VTX-806, as an adeno-associated virus (AAV) vector with high potency and low immunogenicity. AAVs were optimized using Cyp27a1 expression cassettes containing a liver-specific promoter designed to prevent potential activation of an innate immune response and added regulatory elements: minute virus of mice small intron (MVM) and Woodchuck Hepatitis Virus post-transcriptional regulatory element (WPRE). Results demonstrated in vitro and in vivo higher Cyp27a1 expression with VTX-806, restoring normal levels of circulating 7αC4, expression of hepatic bile acid synthesis-related genes, and corrected hepatomegaly. Importantly, normal levels of 7αC4 were restored in the brain. These results demonstrate for the first time that liver-directed AAV gene therapy can normalize levels of toxic metabolites in the brain, offering a potentially effective and curative treatment option for CTX patients. Details of poster presentations are as follow: Poster Title: Long-term metabolic, phenotypic, and neuropathological characterization of the Cyp27a1-/- mouse model of cerebrotendinous xanthomatosis Poster Number: P0381Presenter: Laia Trigueros Motos, Research Scientist at Vivet TherapeuticsDate and Time: Tuesday 22 October at 19:30-21:00 CESTLocation: Forum Poster Title: S/MAR-Containing AAV Vectors Result in an Increase in AAV Episomes and a Reduction in AAV Integration Sites in a Mouse Model With a High Rate of Hepatocyte Proliferation Poster Number: P0138Presenter: Andrea Llanos Ardaiz, PhD Apprentice at Vivet TherapeuticsDate and Time: Wednesday 23 October at 13:30-15:00 CESTLocation: Concourse Level – 1 and Mezzanine Concourse Poster Title: Liver-directed gene therapy normalizes toxic bile acid metabolite levels in the blood and brain of mice with cerebrotendinous xanthomatosis Poster Number: P0888Presenter: Laia Trigueros Motos, Research Scientist at Vivet TherapeuticsDate and Time: Thursday 24 October at 18:00-19:30 CESTLocation: Concourse Level – 1 and Mezzanine Concourse Poster 1 Authors: L Trigueros-Motos3,‡, A Molina1,2,‡, G Pérez1,2, I Marcilla1,2, M Molina1,2, L Neri3, D Moreno-Luqui1,2, A Douar4, JP Combal4, A García-Osta 1,2, M Cuadrado-Tejedor 1,2, B Tamarit4, C Bouquet4, G Despres5, P Krasniqi5, A Lamazière5, 6, R Hernandez-Alcoceba1, G González-Aseguinolaza1,2,3,* 1 Division of DNA and RNA Medicine, CIMA, University of Navarra, Pamplona, Spain 2 Institute for Sanitary Research (IdiSNA), Pamplona, Spain 3 Vivet Therapeutics S.L., Spain 4 Vivet Therapeutics S.A.S., Paris, France 5 Sorbonne Université, Saint Antoine Research Center, INSERM UMR 938, Paris, France 6 Département de Métabolomique Clinique, Hôpital Saint Antoine, AP-HP, Sorbonne Université, Paris, France ‡Equal contribution, *ggonzalez@vivet-therapeutics.com Poster 2 Authors: A Llanos-Ardaiz1, A Lantero1, M Ruiz de Galarreta1, L Neri1, I Mauleón 2, M Bilbao-Arribas 2,3, B Tamarit4, V Ferrer4, A Douar4, JP Combal4, R Aldabe2, G Gonzalez-Aseguinolaza 1,2 1 Vivet Therapeutics S.L., Pamplona, Spain. 2 DNA & RNA Medicine Division, Centre for Applied Medical Research (CIMA), University of Navarra, Pamplona, Spain. 3 IdISNA, Navarra Institute for Health Research, Pamplona, Spain. 4 Vivet Therapeutics S.A.S., Paris, France Poster 3 Authors: A Molina1,2,‡, L Trigueros-Moto 3,‡, G Pérez1,2, M Molina1,2, I Marcilla-García1,2, L Neri3, A Douar4, JP Combal4, B Tamarit4, C Bouquet 4, P Krasniqi 5, A Lamazière5, 6, R Hernandez-Alcoceba1, G González-Aseguinolaza1,2,3,* 1 Division of DNA and RNA Medicine, CIMA, University of Navarra, Pamplona, Spain 2 Institute for Sanitary Research (IdiSNA), Pamplona, Spain 3 Vivet Therapeutics S.L., Spain 4 Vivet Therapeutics S.A.S., Paris, France 5 Sorbonne Université, Saint Antoine Research Center, INSERM UMR 938, Paris, France 6 Département de Métabolomique Clinique, Hôpital Saint Antoine, AP-HP, Sorbonne Université, Paris, France ‡Equal contribution, *ggonzalez@vivet-therapeutics.com -Ends- For further information, please contact: Optimum Strategic Communications Mary Clark, Zoe Bolt, Vareen OuthonesackTel: +44 (0) 20 3882 9621Email: vivet@optimumcomms.com About Vivet Therapeutics Vivet Therapeutics is a private, clinical-stage biotech company developing novel and long-lasting gene therapies for rare inherited metabolic conditions, including Wilson’s Disease. Vivet’s gene therapy platform uses recombinant adeno-associated viruses (rAAVs) as vectors and has initiated two clinical programs and four pre-clinical assets to date. Its most advanced program VTX-PID, is aimed at depleting Neutralizing Antibodies (NAbs) levels for a given AAV serotype and is advancing in a Phase 1 dose escalating study in Nabs+ subjects. Its Leading pre-clinical program VTX-806, for the treatment of Cerebrotendinous Xanthomatosis (CTX), received ODD by the EC in September 2024 and is demonstrating its potential as an alternative treatment option for patients affected by the burden of CTX. Vivet Therapeutics was founded in 2016 by CEO Dr Jean-Philippe Combal and CSO Dr Gloria Gonzalez-Aseguinolaza and is led by a highly experienced management team with deep expertise developing gene therapies and orphan drugs. Vivet Therapeutics was founded in 2016 by CEO Dr Jean-Philippe Combal and CSO Dr Gloria Gonzalez-Aseguinolaza and is led by a highly experienced management team with deep expertise developing gene therapies and orphan drugs. Vivet Therapeutics is backed by international life science investors including Novartis Venture Fund, Roche Venture Fund, HealthCap, Pfizer Inc., Columbus Venture Partners, Ysios Capital, Kurma Partners and Eurazeo. In 2019, key investor Pfizer contributed a €45M investment to collaborate with Vivet in recognition of its scientific expertise and innovative technology platforms. For more information, please visit www.vivet-therapeutics.com - Follow us on LinkedIn @Vivet Therapeutics and Twitter @Vivet_tx…………………………

PKU GOLIKE® is a commercial ultra-rare disease medical formula complementary to Eton's existing metabolic franchise and specialty call point Transaction is expected to be accretive to 2024 earnings Estimated peak sales of more than $10 million annually U.S. phenylketonuria ("PKU") medical formula market estimated to be $100 million annually March 22, 2024 (GLOBE NEWSWIRE) -- Eton Pharmaceuticals, Inc (“Eton” or the “Company”) (Nasdaq: ETON), an innovative pharmaceutical company focused on developing and commercializing treatments for rare diseases, today announced that it has acquired U.S. rights to PKU GOLIKE® from RELIEF THERAPEUTICS Holding SA (“Relief”) (SIX: RLF, OTCQB: RLFTF, RLFTY). “We are excited to be partnering with Relief on PKU GOLIKE in the United States. After extensive discussions with metabolic geneticists, dieticians, and PKU patients, we believe PKU GOLIKE is the best product in the estimated $100 million U.S. PKU medical formula market. With our sales force and existing relationships in the metabolic community, we believe we can significantly increase the awareness, education, and adoption of this important product,” said Sean Brynjelsen, CEO of Eton Pharmaceuticals. “We are very pleased to gain this partnership with Eton for PKU GOLIKE patients in the US as it is aligned with RELIEF’s strategy to enhance patient access to our innovative products,” said Michelle Lock, interim CEO of Relief. “Eton brings valuable know-how in the metabolic space as well as commercialization expertise for products in rare diseases.” PKU is a rare inherited disorder caused by a defect in the enzyme needed to break down phenylalanine, leading to a toxic buildup of phenylalanine when eating foods that contain proteins. Treatment of PKU requires patients to follow a strict diet that severely limits phenylalanine content and typically requires low protein foods supplemented by phenylalanine-free medical formulas. Excessive levels of phenylalanine in the blood accumulate in the brain and inhibit proper brain development. It is estimated that 8,000 PKU patients in the U.S. utilize medical formulas to manage their diet. PKU GOLIKE® is a next generation medical formula product engineered with the patent protected, pharmaceutical grade Physiomimic™ technology for the dietary management of PKU under medical supervision. PKU GOLIKE’s taste-masked, odor-free coating technology is designed to provide a better taste and a superior experience compared to alternative PKU medical formulas. In addition, PKU GOLIKE’s delayed amino acid release formulation is designed to keep patients full for a longer period of time. Relief launched PKU GOLIKE Granules in the United States in the fourth quarter of 2022 and the PKU GOLIKE Tropical Bar in the second quarter of 2023. Only a few months into the product’s launch, PKU GOLIKE’s fourth quarter net sales in the U.S. were at an annual run rate of more than $1 million. Relief, through its subsidiary APR, has commercialized PKU GOLIKE in Europe since 2019 and seen strong adoption. Eton plans to promote PKU GOLIKE with its existing metabolic sales force, which currently promotes Eton’s Carglumic Acid, Betaine, and Nitisinone products. PKU patients’ care is typically overseen by metabolic geneticists and their support staff of nurse practitioners and registered dieticians. Medical formulas for PKU are frequently covered by insurance and are regulated by the FDA as medical food products. PKU GOLIKE is exclusively distributed in the United States by Pentec Health. Patients and healthcare professionals seeking additional information on the product can visit www.PKUGOLIKE.com. The transaction is expected to be accretive to Eton’s 2024 earnings and the company expects peak sales of more than $10 million annually. As part of the transaction, Eton also received U.S. rights to Relief’s GOLIKE medical formulas line extensions under development for the management of the metabolic conditions tyrosinemia and homocystinuria, which are expected to launch in 2025 and 2026, respectively. Eton has also been granted a right of first negotiation for Relief’s RLF-OD032 development candidate. RLF-OD032 is an innovative drug product candidate under development for the treatment of PKU and is expected to be filed with the FDA in the second half of 2025 as a 505(b)(2) New Drug Application. Relief will continue to own PKU GOLIKE rights outside the United States. Eton is an innovative pharmaceutical company focused on developing and commercializing treatments for rare diseases. The Company currently has five commercial rare disease products: ALKINDI SPRINKLE®, PKU GOLIKE®, Carglumic Acid, Betaine Anhydrous, and Nitisinone. The Company has three additional product candidates in late-stage development: ET-400, ET-600, and ZENEO® hydrocortisone autoinjector. For more information, please visit our website at www.etonpharma.com. Relief is a commercial-stage biopharmaceutical company committed to advancing treatment paradigms and delivering improvements in efficacy, safety, and convenience to benefit the lives of patients living with select specialty and rare diseases. Relief’s portfolio offers a balanced mix of marketed, revenue-generating products, proprietary, globally patented Physiomimic™ and TEHCLO™ platform technologies and a targeted clinical development pipeline consisting of risk-mitigated assets focused in three core therapeutic areas: rare metabolic disorders, rare skin diseases and rare respiratory diseases. In addition, Relief is commercializing several legacy products via licensing and distribution partners. Relief’s mission is to provide therapeutic relief to those suffering from rare diseases and is being advanced by an international team of well-established, experienced biopharma industry leaders with extensive research, development and rare disease expertise. Relief is headquartered in Geneva, with additional offices in Balerna, Switzerland, Offenbach am Main, Germany and Monza, Italy. Relief is listed on the SIX Swiss Exchange under the symbol RLF and quoted in the U.S. on OTCQB under the symbols RLFTF and RLFTY. For more information, visit www.relieftherapeutics.com. Phenylketonuria (PKU) is caused by a defect of the enzyme needed to break down phenylalanine (Phe), leading to a toxic buildup of Phe from the consumption of foods containing protein or aspartame. Untreated PKU can result in global developmental delay or severe irreversible intellectual disability, as well as growth failure, hypopigmentation, motor deficits, ataxia and seizures. Living with PKU requires a limited diet and very careful management. If left unmanaged, PKU can lead to devastating consequences, such as brain damage. People living with PKU do not have the ability to metabolize Phe, which is found in many foods, and they require supplementation of amino acid-based phenylalanine-free medical formulas as part of an effort to prevent protein deficiency and optimize metabolic control. Medical formulas used in PKU are challenged to provide a range of amino acids slowly and without a medicinal aftertaste. PKU GOLIKE® products are foods for special medical purposes (FSMPs) for the dietary management of PKU in both children and adults for use under medical supervision. Developed with Relief’s proprietary, patent-protected Physiomimic Technology™ drug delivery platform, PKU GOLIKE® products are the first prolonged-release amino acid FSMPs, characterized by a special coating that ensures physiological absorption of the amino acids mirroring that of natural proteins. The special coating also masks the unpleasant taste, odor and aftertaste of the amino acids. PKU GOLIKE® granules are flavorless and can be mixed with many foods. PKU GOLIKE® products contain all 19 amino acids that people with PKU need to maintain neurological and muscular health and is fortified with 27 essential vitamins and minerals, including ones normally found in protein-rich foods like iron, calcium and vitamin B12. The PKU GOLIKE® line of products are available in convenient packets (PKU GOLIKE Plus® 3-16 and 16+) and medical formula bars (PKU GOLIKE BAR®). PKU GOLIKE® products have been commercially available in the U.S. since October 2022. For more information, visit www.pkugolike.com (Please note this site is intended for U.S. audiences only). The content above comes from the network. if any infringement, please contact us to modify.

GENEVA, SWITZERLAND / ACCESSWIRE / March 22, 2024 / RELIEF THERAPEUTICS Holding SA (SIX:RLF)(OTCQB:RLFTF)(OTCQB:RLFTY ) (Relief, or the Company), a biopharmaceutical company committed to delivering innovative treatment options for select specialty, unmet and rare diseases, today announced it has granted an exclusive license to Eton Pharmaceuticals, Inc. (Nasdaq: ETON) (Eton) for the commercialization of GOLIKE ® family of products in the United States. "This transition is fully aligned with Relief's strategy of moving the GOLIKE products into partnership models in the U.S. and Europe. We are very pleased to be establishing this partnership with Eton for GOLIKE patients in the U.S. given their valuable experience in the metabolic area," said Michelle Lock, interim CEO of Relief. "We are excited to be partnering with Relief on PKU GOLIKE in the United States. After extensive discussions with metabolic geneticists, dieticians, and PKU patients, we believe PKU GOLIKE is the best product in the estimated $100 million U.S. PKU medical formula market. With our sales force and existing relationships in the metabolic community, we believe we can significantly increase the awareness, education, and adoption of this important product," said Sean Brynjelsen, CEO of Eton Pharmaceuticals. Under the terms of the agreement, Relief will receive an upfront payment of $2.2 million and is eligible to receive an additional $2.0 million in sales milestones payments as well as mid-teens royalties on net sales. In the fourth quarter of 2023, PKU GOLIKE's annualized net sales exceeded $1 million in the U.S., continuing its growth trajectory since its launch in late 2022. As part of the agreement, Eton also received U.S. rights to Relief's GOLIKE Medical Food line extensions under development for the management of other inherited rare metabolic diseases such as tyrosinemia and homocystinuria, which are both expected to launch in 2025 and 2026 under the same trademark. Relief is also in discussions with Eton related to additional development assets, including RLF-OD032. RLF‑OD032 is an innovative drug product candidate under development for the treatment of PKU expected to be filed for approval before the FDA in H2/2025 as 505(b)(2) application. Relief will continue to fully own GOLIKE rights outside the United States. About Relief Relief is a commercial-stage biopharmaceutical company committed to advancing treatment paradigms and delivering improvements in efficacy, safety, and convenience to benefit the lives of patients living with select specialty and rare diseases. Relief's portfolio offers a balanced mix of marketed, revenue-generating products, our proprietary, globally patented Physiomimic™ and TEHCLO™ platform technologies and a targeted clinical development pipeline consisting of risk-mitigated assets focused in three core therapeutic areas: rare metabolic disorders, rare skin diseases and rare respiratory diseases. In addition, Relief is commercializing several legacy products via licensing and distribution partners. Relief's mission is to provide therapeutic relief to those suffering from rare diseases and is being advanced by an international team of well-established, experienced biopharma industry leaders with extensive research, development and rare disease expertise. Relief is headquartered in Geneva, with additional offices in Balerna, Switzerland, Offenbach am Main, Germany and Monza, Italy. Relief is listed on the SIX Swiss Exchange under the symbol RLF and quoted in the U.S. on OTCQB under the symbols RLFTF and RLFTY. For more information, please visit our website or follow Relief on LinkedIn . About Eton Pharmaceuticals Eton is an innovative pharmaceutical company focused on developing and commercializing treatments for rare diseases. It currently has five commercial rare disease products: ALKINDI SPRINKLE ® , PKU GOLIKE ® , Carglumic Acid, Betaine Anhydrous, and Nitisinone. Eton has three additional product candidates in late-stage development: ET-400, ET-600, and ZENEO ® hydrocortisone autoinjector. For more information, visit . About Phenylketonuria (PKU) Phenylketonuria (PKU) is caused by a defect of the enzyme needed to break down phenylalanine (Phe), leading to a toxic buildup of Phe from the consumption of foods containing protein or aspartame. Untreated PKU can result in global developmental delay or severe irreversible intellectual disability, as well as growth failure, hypopigmentation, motor deficits, ataxia and seizures. Living with PKU requires a limited diet and very careful management. If left unmanaged, PKU can lead to devastating consequences, such as brain damage. People living with PKU do not have the ability to metabolize Phe, which is found in many foods, and they require supplementation of amino acid-based phenylalanine-free Medical Foods to prevent protein deficiency and optimize metabolic control. Currently available Medical Foods may lead to poor or suboptimal clinical outcomes and compliance because they are rapidly absorbed and are characterized by an unpleasant odor and aftertaste. Such factors contribute to barriers to social interaction for PKU patients, further limiting Medical Foods compliance and exposing patients to the risks of poor disease control. About PKU GOLIKE PKU GOLIKE ® products are Medical Foods for the dietary management of PKU in both children and adults. Developed with the Relief proprietary, patent-protected Physiomimic Technology™ drug delivery platform, PKU GOLIKE ® products are the first prolonged-release amino acid Medical Food, characterized by a special coating that ensures physiological absorption of the amino acids mirroring that of natural proteins. The special coating also masks the unpleasant taste, odor and aftertaste of the amino acids. PKU GOLIKE ® granules are flavorless and can be mixed with many foods. PKU GOLIKE ® granule products contain all 19 amino acids that people with PKU need to maintain neurological and muscular health and is fortified with vitamins and minerals, including ones normally found in protein-rich foods like iron, calcium, and vitamin B12. The PKU GOLIKE ® line of products is available in convenient packets (PKU GOLIKE Plus ® 3-16 and 16+) and medical food bars (PKU GOLIKE BAR ® ). PKU GOLIKE ® products have been commercially available in the U.S. since October 2022. For more information, visit (this site is intended for U.S. audiences only). CONTACT : RELIEF THERAPEUTICS Holding SA Avenue de Sécheron 15 1202 Geneva Switzerland contact@relieftherapeutics.com DISCLAIMER This press release contains forward-looking statements. Forward-looking statements involve known and unknown risks, uncertainties, including its ability to achieve its corporate, development and commercial goals, and other factors which could cause the actual results, financial condition, performance or achievements of Relief to be materially different from any future results, performance or achievements expressed or implied by such forward-looking statements. A number of factors, including those described in Relief's filings with the SIX Swiss Exchange and the U.S. Securities and Exchange Commission (SEC), could adversely affect Relief. Copies of Relief's filings with the SEC are available on the SEC EDGAR database at . Relief does not undertake any obligation to update the information contained herein, which speaks only as of this date. SOURCE: Relief Therapeutics Holdings AG View the original press release on accesswire.com