PH-15

▎药明康德内容团队编辑Vistagen今天宣布，在研疗法PH15在正在进行的2A期临床试验中获得积极结果。PH15是一种在研pherine鼻喷剂，旨在改善因精神疲劳（mental fatigue）引起的精神运动障碍。在睡眠不足的研究参与者中，与安慰剂和咖啡因相比，PH15显示出在反应时间上的统计学显著改善。这项随机双盲、安慰剂对照、交叉设计的2A期临床试验旨在评估PH15鼻内给药在改善精神运动表现方面的有效性、安全性和耐受性。十名参与者随机接受PH15（多次给药，每次1.6微克，总剂量为9.6微克）、安慰剂（鼻喷剂和口服）或咖啡因（在测试前一小时口服400毫克单次剂量）。这些测试每周进行一次，在每个测试时段，通过计算机测量参与者对规律和随机“闪光”光刺激的反应时间。结果表明，在所有测试点，PH15鼻喷剂的1.6微克剂量使平均反应时间显著快于安慰剂鼻喷剂（p<0.001）。此外，在参与者疲劳最为严重的午夜和凌晨3:00的测试时段，PH15在改善反应时间方面的表现也显著优于口服咖啡因（p<0.001）。PH15的耐受性良好，未报告任何严重不良事件。PH15和安慰剂的不良事件特征相似，只有一名接受PH15治疗的参与者和三名接受安慰剂的参与者报告了轻微的鼻痒。然而，服用口服咖啡因的参与者则报告了多种副作用，包括心悸、欣快感、口干、胃痛和多尿。Pherine是一类新的聚焦于神经回路的候选药物，通过鼻内给药用于治疗精神病和神经系统疾病。它的作用机制独特，通过激活鼻部化学感受器，将信号通过神经回路传送到特定的大脑区域，与所有已批准药物的作用机制截然不同。这种新颖的鼻-脑作用机制可提供快速起效的疗效和差异化的安全性特征，无需全身吸收或直接进入中枢神经系统。到目前为止，Vistagen在临床阶段的神经科学管线中的所有五种pherine化合物在已完成的临床试验中均显示出良好的安全性特征。▲欲了解更多前沿技术在生物医药产业中的应用，请长按扫描上方二维码，即可访问“药明直播间”，观看相关话题的直播讨论与精彩回放参考资料：[1] Vistagen Announces Positive Results from Phase 2A Pilot Study of PH15 for Improvement of Psychomotor Impairment Caused by Mental Fatigue. Retrieved April 25, 2024, from https://www.businesswire.com/news/home/20240425871950/en免责声明：药明康德内容团队专注介绍全球生物医药健康研究进展。本文仅作信息交流之目的，文中观点不代表药明康德立场，亦不代表药明康德支持或反对文中观点。本文也不是治疗方案推荐。如需获得治疗方案指导，请前往正规医院就诊。版权说明：本文来自药明康德内容团队，欢迎个人转发至朋友圈，谢绝媒体或机构未经授权以任何形式转载至其他平台。转载授权请在「药明康德」微信公众号回复“转载”，获取转载须知。分享，点赞，在看，聚焦全球生物医药健康创新

PH15 nasal spray demonstrates statistically significant efficacy versus placebo and caffeine in a placebo-controlled Phase 2A pilot study in sleep-deprived participants PH15 was safe and well-tolerated with an adverse event pro to placebo SOUTH SAN FRANCISCO, Calif.--(BUSINESS WIRE)-- Vistagen (Nasdaq: VTGN), a biopharmaceutical company pioneering neuroscience to deliver groundbreaking therapies for individuals affected by psychiatric and neurological disorders, today announced positive results from a Phase 2A pilot study of PH15, an investigational pherine nasal spray, for improvement of psychomotor impairment caused by mental fatigue. PH15 demonstrated a statistically significant improvement in reaction time compared to placebo and caffeine in sleep-deprived study participants. The previously unreported randomized, double-blind, placebo-controlled, crossover Phase 2A pilot study of PH15 was designed to explore the efficacy, safety, and tolerability of intranasal administration of PH15 on psychomotor performance as measured by reaction time in sleep-deprived participants. Ten participants were randomly administered PH15 (multiple 1.6 µg doses, total dose of 9.6 µg), placebo (nasal spray and oral), or caffeine (single 400 mg oral dose administered 1 hour before the session) in sequential sleep deprivation study sessions spaced one week apart. During each sleep deprivation session, participants received blinded treatments before the start of each of four testing periods, at 6:00 p.m., 9:00 p.m., midnight, and 3:00 a.m. The participants’ reaction times to both isochronous (regular interval) and stochastic (random interval) “flash” light stimuli were computer-measured during each testing period as participants responded to the luminous stimuli. Statistically Significant Efficacy During both isochronous and stochastic reaction time tests, administration of 1.6 µg PH15 nasal spray induced a significantly faster mean reaction time compared to placebo nasal spray across all time points (p<0.001). PH15 also demonstrated a statistically significant improvement in reaction time compared to oral caffeine (p<0.001) for both reaction time tests during the testing periods at midnight and 3:00 a.m. when subjects were most fatigued. Well-tolerated Therapy PH15 was well-tolerated with no serious adverse events reported. The adverse event profiles of PH15 and placebo were comparable, with brief nasal itching in one PH15-dosed participant and three placebo-dosed subjects. Participants on oral caffeine, however, experienced palpitations, euphoria, dry mouth, stomachache, and polyuria. “In this Phase 2A pilot study, PH15 nasal spray demonstrated significant improvement in reaction time when compared to both oral caffeine and placebo in sleep-deprived participants. These pilot findings contribute to our confidence in PH15’s potential as an innovative treatment for enhancing psychomotor performance and potentially cognitive impairment, particularly in addressing the challenges of mental fatigue,” said Shawn Singh, Chief Executive Officer of Vistagen. “Numerous disorders, such as shift work disorder, sleep apnea, and narcolepsy, can lead to debilitating sleep deprivation and mental fatigue. Individuals affected by these disorders require improved treatment options with a differentiated safety profile, one without the potential for abuse liability or negative and treatment-limiting side effects and safety concerns. We anticipate exploring PH15’s potential to emerge as a new and transformative solution for these underserved individuals.” This previously unreported Phase 2A pilot study of PH15 was sponsored by Pherin Pharmaceuticals (Pherin), now a wholly owned subsidiary of Vistagen, and conducted at the National Institute of Psychiatry, Sleep Disorders Clinic in Mexico City, Mexico in 2011. Vistagen gained access to the results of this study in connection with its acquisition of Pherin in February 2023. The late Jose Maria Calvo, MD, formerly Associate Professor, National Institute of Psychiatry in Mexico City, served as the Principal Investigator of the study. About Pherines Pherines are novel neurocircuitry-focused drug candidates delivered intranasally for treatment of psychiatric and neurological disorders. The proposed mechanisms of action (MOAs) of pherines are fundamentally differentiated from the MOAs of all approved drugs, offering a new standard of care for multiple central nervous system (CNS) disorders. Their effect on the CNS is through the activation of nasal chemosensory receptors, which send signals through neural circuitry to specific brain regions. The novel nose-to-brain MOAs of pherines offer the potential to deliver meaningful, rapid-onset efficacy and a differentiated safety profile, without systemic absorption or CNS uptake. All of the five pherines in Vistagen’s clinical-stage neuroscience pipeline have demonstrated a favorable safety pro clinical trials completed to date. About PH15 PH15 is an odorless, tasteless synthetic investigational pherine with a novel, rapid-onset proposed mechanism of action (MOA) that is fundamentally differentiated from the MOA of all currently approved treatments to improve psychomotor or cognitive impairment caused by mental fatigue. PH15’s proposed MOA targets nasal receptors that activate olfactory-amygdala and olfactory hippocampus neural circuits in the limbic system that are known to be associated with psychomotor activity and cognition, without requiring systemic absorption or direct action on neurons in the brain. PH15 has demonstrated an excellent safety pro all clinical trials completed to date. Vistagen is currently evaluating the potential Phase 2 development path forward for PH15 and a nonclinical program required to support a U.S. Investigational New Drug application to facilitate further Phase 2 development of PH15 in the U.S. About Vistagen Vistagen (Nasdaq: VTGN) is a biopharmaceutical company pioneering neuroscience to deliver groundbreaking therapies for individuals affected by psychiatric and neurological disorders. Five of Vistagen’s clinical-stage neuroscience pipeline candidates belong to a new class of drugs known as pherines, which are investigational neuroactive nasal sprays with innovative proposed mechanisms of action that activate chemosensory neurons in the nasal passages to impact fundamental neural circuitry in the brain without the need for systemic absorption or binding to receptors in the brain. Vistagen’s sixth investigational candidate is an oral prodrug with potential to modulate NMDA receptor activity. At Vistagen, we are passionate about delivering differentiated treatments that set new standards of care for people living with anxiety, depression, and other neurological disorders. Connect at . Forward-looking Statements This press release contains certain forward-looking statements within the meaning of the federal securities laws. These forward-looking statements involve known and unknown risks that are difficult to predict and include all matters that are not historical facts. In some cases, you can identify forward-looking statements by the use of words such as “may,” “could,” “expect,” “project,” “outlook,” “strategy,” “intend,” “plan,” “seek,” “anticipate,” “believe,” “estimate,” “predict,” “potential,” “strive,” “goal,” “continue,” “likely,” “will,” “would” and variations of these terms and similar expressions, or the negative of these terms or similar expressions. Such forward-looking statements are necessarily based upon estimates and assumptions that, while considered reasonable by Vistagen and its management, are inherently uncertain. As with all pharmaceutical products, there are substantial risks and uncertainties in the process of development and commercialization and actual results or development may differ materially from those projected or implied in these forward-looking statements. Among other things, there can be no guarantee that any of the Company’s drug candidates will successfully complete ongoing or future clinical trials, receive regulatory approval or be commercially successful, or that the Company will be able to successfully replicate the result of past studies of any of its product candidates, including PH15. Other factors that may cause such a difference include, without limitation, risks and uncertainties related to delays in launching, conducting and/or completing nonclinical programs for any of the Company’s drug candidates, including PH15; launching, conducting and/or completing ongoing and future clinical trials for any of the Company’s drug candidates; the scope and enforceability of the Company’s patents; the Company’s ability to secure adequate financing for clinical development of certain of its drug candidates; fluctuating costs of materials and other resources and services required to conduct the Company’s ongoing and/or future clinical and nonclinical trials; market conditions; the impact of general economic, industry or political conditions in the United States or internationally; and other technical and unexpected hurdles in the development, manufacture and commercialization of the Company’s drug candidates. These risks are more fully discussed in the section entitled "Risk Factors" in the Company’s most recent Annual Report on Form 10-K for the fiscal year ended March 31, 2023, and in the Company’s most recent Quarterly Report on Form 10-Q for the quarter ended December 31, 2023, as well as discussions of potential risks, uncertainties, and other important factors in our other filings with the U.S. Securities and Exchange Commission (SEC). The Company’s SEC filings are available on the SEC’s website at . Additionally, you should not place undue reliance on these forward-looking statements in the future, because they apply only as of the date of this press release and should not be relied upon as representing the Company’s views as of any subsequent date. The Company explicitly disclaims any obligation to update any forward-looking statements, other than as may be required by law. If the Company does update one or more forward-looking statements, no inference should be made that the Company will make additional updates with respect to those or other forward-looking statements.