Neurotech International Limited (ASX: NTI)

Rett Syndrome Patients Show Further Clinical Improvement After 20 Weeks of NTI164 Treatment


Neurotech International Limited (ASX: NTI) (“Neurotech” or “the Company”), a clinical-stage biopharmaceutical development company focused predominately on paediatric neurological disorders, today is pleased to report further clinical efficacy and the safety results for all 14 female paediatric patients who have now completed 20 weeks of daily oral treatment with NTI164 under the Company’s one year extension period of the Phase I/II clinical trial investigating the use of NTI164 in Rett Syndrome.

Key Points:

  • Further significant clinical improvements observed in Rett Syndrome patients after 20 weeks of daily oral treatment with Neurotech’s broad-spectrum cannabinoid drug therapy NTI164
  • Continued clinical improvement at 20 weeks (versus baseline) on four core Rett-domain anchors with 100% of patients (pts) improved (p<0.001) vs. 93% at wk 12 with 57% of pts “very much/much improved” (vs. 36% at wk 12)
  • Gold standard RSBQ measure of key Rett symptoms showed an improvement of 24% versus baseline (p<0.001), with no further improvement from week 12 to week 20 (p=0.08)
  • No diarrhoea, vomiting/nausea reported from 12 to 20 weeks and no weight loss with all 14 pts who commenced the Phase I/II clinical trial remaining on treatment
  • Durable clinical response, coupled with excellent safety provides strong rationale for long term administration of NTI164 for Rett Syndrome patients where new treatments are urgently required

Dr Thomas Duthy, Executive Director of Neurotech International said “We are pleased to see these patients continue to do very well on extended treatment with NTI164, with zero safety events recorded relating to diarrhoea and nausea/vomiting from week 12 to week 20 with zero weight loss recorded. Our safety and efficacy to 20 weeks is trending favourably when compared to the current FDA approved treatment, DAYBUE™ (trofinetide). Rett Syndrome represents an attractive market opportunity for NTI164, with a potential annual market opportunity of approximately US$2.0 billion. We are currently working with our clinical advisors and Professor Ellaway (our newly appointed Chief Medical Officer) on the design of a registration directed Phase III clinical trial.”

A caregiver of a patient in the NTIRTT1 trial commented after 20 weeks of treatment with NTI164 “Increased use of eye gaze technology and increased ability to use the eye gaze accurately when making choices.”

Clinical Improvement Continues on NTI164

Clinical improvement was assessed by the clinician using the gold standard, Clinical Global Impression - Improvement (CGI-I), which measures how much the patient's illness has improved or worsened relative to a baseline state at the beginning of NTI164 treatment and ranges from 1 – “Very Much Improved” to 7 - “Very Much Worse”. A decrease in CGI-I score indicates improvement. Based on the CGI-I primary endpoint at 12 weeks Neurotech has four core domains of interest – communication skills, mental alertness, socialisation/eye contact and anxiety – which will likely form the basis of the CGI-I measures required for a registration-directed Phase III clinical trial of NTI164 versus placebo.

There was a statistically significant difference (improvement) in CGI-I in these four core domains at 20 weeks versus baseline; with a mean difference of -1.3 (p=<0.001), versus mean difference of -0.9 (p=0.001) at 12 weeks. Overall, the 20 week data showed an improvement of 33% versus baseline (compared to 23% improvement at 12 weeks). Between 12 to 20 weeks, there was an additional CGI-I improvement of -0.4, representing a significant, additional improvement of 13% (p=0.007), which continues the downward trajectory of clinical improvement overall.

At 20 weeks, 100% of patients showed improvement (versus 93% of patients at 12 weeks) with; 57% very much or much improved (versus 36% at week 12) as shown below.

The individual measures of CGI-I in the four core composite measures at 20 weeks all showed continued improvement from 12 weeks: Communication Skills (mean difference -0.2), Mental Alertness (mean difference -0.6), Socialisation/ Eye Contact (mean difference -0.3) and Anxiety (mean difference -0.3).

Rett Syndrome symptoms via RSBQ were stable

The Rett Syndrome Behavioural Questionnaire (RSBQ) consists of 8 domains/subscales that reflect the core features of the disease: General Mood; Breathing Problems; Hand Behaviours; Repetitive Face Movements; Body Rocking and Expressionless Face; Nighttime Behaviours; Fear/Anxiety; and Walking/Standing.

At 20 weeks, patients receiving NTI164 showed a clinically meaningful 24% improvement in total RSBQ score versus baseline (p<0.001). There was no further improvement in RSBQ scores between week 12 and week 20 with RSBQ measures relatively stable (mean difference 2.9, p=0.08). At commencement the average RSBQ total score for the patients was 44.6 compared to 31.2 at 12 weeks and 34.1 at 20 weeks.


Click here for the full ASX Release

This article includes content from Neurotech International Limited licensed for the purpose of publishing on Investing News Australia. This article does not constitute financial product advice. It is your responsibility to perform proper due diligence before acting upon any information provided here. Please refer to our full disclaimer here.

NTI:AU
The Conversation (0)
Invion Executive Chair and CEO Thian Chew.

Invion CEO Maps Path to Peer-level Valuation as Momentum for Cancer Treatment Trials Builds

Invion (ASX:IVX) Executive Chair and CEO Thian Chew says the company sees a path to a rerate toward clinical-stage oncology peers — typically valued from AU$30 million to AU$40 million up to several hundred million — if it executes on a trio of near-term priorities: simplifying licencing, cleaning up shareholder financing structures and dialling up investor awareness.

In an interview with the Investing News Network, Chew stressed that Invion’s fundamentals are already in place: a platform therapy being tested across multiple cancers with an active clinical program, and a US Food and Drug Administration orphan drug designation potentially fast tracking approvals.

“The challenge is making sure people invest the time to understand where we're at. So if we solve all those three, even without doing any more development work, then we believe that we can get around the comparable levels of valuation, and that creates some interesting opportunities for us,” Chew said.

Keep reading...Show less
Large pharmaceutical pill with gold dollar sign in the middle. Stock tickers and charts in the background.

Top 5 Small-cap Pharma Stocks of 2025

Today's pharmaceutical stocks are facing the challenges of government-imposed drug price caps, waning demand for COVID-19 vaccines and global stock market upheaval. However, the industry's major underlying drivers — higher rates of cancer and chronic disease — are still at play and not expected to dissipate.

The US reigns supreme in the pharma market, both in terms of drug demand and development. In 2024, 50 novel medicines were approved by the US Food and Drug Administration (FDA), compared to 55 such approvals in 2023. Last year's FDA approvals include Eli Lilly and Company's (NYSE:LLY) Alzheimer's disease treatment Kisunla.

Big pharma largely steals the show, but some small- and mid-cap NASDAQ pharma stocks have also made gains.

Keep reading...Show less
Blank pill bottle spilling a variety of pharmaceutical pills and capsules.

5 Biggest Pharmaceutical ETFs in 2025

The global pharmaceutical market reached a total value of US$1.38 trillion in 2024, according to Research and Markets, up significantly from the US$888 billion seen just over a decade earlier in 2010.

Experienced and novice investors alike may want to consider pharmaceutical exchange-traded funds (ETFs) as a way to gain exposure to the top pharma companies. Like all ETFs, pharmaceutical ETFs are a good option for those who want to trade a set of assets in the pharmaceutical industry instead of focusing solely on individual pharmaceutical stocks.

The main advantage of a pharmaceutical ETF is the fact that it can provide exposure to an overarching sector, but still trades like a stock. Pharma ETFs also offer less market volatility and lower fees and expenses.

Keep reading...Show less
Canada maple leaves on left and pharmaceutical pills in red and blue on right.

5 Best-performing Canadian Pharma Stocks of 2025

From established players to up-and-coming firms, Canada's pharmaceutical landscape is diverse and dynamic.

Canadian drug companies are working to discover and develop major innovations amidst an increasingly competitive global landscape. Rising technologies such as artificial intelligence are playing a role in the landscape as well.

Here the Investing News Network lists the top Canadian pharma stocks on the TSX, TSXV and CSE by year-on-year gains. All data was compiled on July 18, 2025, using TradingView’s stock screener, and companies with market caps above C$10 million at that time were considered.

Keep reading...Show less
Various blister packs with pills and capsules in different colors and shapes.

Trump Signs Sweeping Order to Slash Drug Prices, Pressure Pharma Giants

US President Donald Trump has signed a sweeping executive order aimed at dramatically reducing prices for prescription drugs, vowing to end “foreign free-riding” on American pharmaceutical innovation.

The order directs federal agencies to pressure both drug manufacturers and wealthy foreign countries to bring their prices in line with those paid in the US, or face aggressive trade and regulatory actions.

“In case after case, our citizens pay massively higher prices than other nations pay for the same exact pill, from the same factory, effectively subsidizing socialism abroad with skyrocketing prices at home,” Trump states in the order.

Keep reading...Show less

Latest Press Releases

Related News

×