2024 Annual Report to shareholders
Released
Released
Announcement PDF
Improving the lives of people with
neurodevelopmental disabilities
Neuren Pharmaceuticals Limited
ANNUAL REPORT 2024
Neuren Pharmaceuticals
is developing new
therapies for debilitating
neurodevelopmental
disorders that emerge
in early childhood and
are characterised by
impaired connections
and signalling between
brain cells. Incorporated
in New Zealand and
based in Melbourne,
Australia, Neuren is
listed on the ASX under
the code NEU.
CONTENTS
1
Neuren’s value proposition
2
Chair and CEO message
4
Operating Review
14 Board
15 Executive Team
16 Environmental, Social and Governance (ESG)
23 Directors’ Responsibilities Statement
24 Consolidated statement of Profit or Loss
and Other Comprehensive Income
25 Consolidated Statement of Financial Position
26 Consolidated Statement of Changes in Equity
27 Consolidated Statement of Cash Flows
28 Notes to the Consolidated Financial Statements
48 Independent Auditor’s Report
51 Additional Information
Neuren Pharmaceuticals Limited Annual Repor t 2024
arge potential upside for shareholders is enabled by financial strength
N E U R E N ’ S V A LU E P R O P O S I T I O N
Maximise value of NNZ-2591 as a multiple indication platform
Positive Phase 2 results for Phelan-McDermid syndrome
Positive Phase 2 results for Pitt Hopkins syndrome
Value
Positive Phase 2 results for Angelman syndrome
Long-term income growth from Acadia’s successful global commercialization of
A$359 million pro-forma cash1
222 million cash and short-term investments at 31 December 2024, adjusted to include receipt in Q1 2025 of PRV sale proceeds, sales milestone and Q4 2024 royalty and payment in Q1 2025 of Q4 2024 tax
THE 2024 NUMBERS – A RECORD YEAR OF INCOME FOR SHAREHOLDERS
The 2024 numbers – a record year of income for shareholders
Comprehensive income (CI)
A$166m
Comprehensive income (CI)
A$166m
CI margin
A$142m
NPAT
Total comprehensive income (A$m)
73%
73%
NPAT
157.1
166.2
FX gain
A$24m
A$142m
R&D investment in NNZ-2591
Corporate & admin costs
A$5m
CI margin
A$33m
FX gain
A$24m
DAYBUE revenue 23 & 24
A$445m
Pro-forma cash
A$359m
Corporate & admin costs
0.2
2022
2023
2024
A$5m
R&D investment in NNZ-2591
A$33m
2
DAYBUETM revenue 23 & 24
A$445m
Pro-forma cash1
A$359m
1 A$222 million cash and short-term investments at 31 December 2024, adjusted to include receipt in Q1 2025 of PRV sale proceeds, sales
milestone and Q4 2024 royalty and payment in Q1 2025 of Q4 2024 tax. This is a non-IFRS measure and is relevant to illustrate the expected
cash and short-term investments position, due to the large proportion of 2024 revenue being earned in Q4 2024 and received in Q1 2025.
1
1
Neuren Pharmaceuticals Limited Annual Repor t 2024
CHAIR AND CEO MESSAGE
P AT R I C K D A V I E S & J O N P I L C H E R
For NNZ-2591, we were excited that during 2024 the
positive Phase 2 trial results for Pitt Hopkins syndrome
and Angelman syndrome were consistent with the
Phelan-McDermid syndrome results, validating our thesis
that NNZ-2591 can potentially have a broad impact on
neurodevelopmental conditions. We were very pleased
with the outcome of our End of Phase 2 Meeting with the
FDA for Phelan-McDermid syndrome, enabling us to move
straight to Phase 3 with a similar program to the successful
DAYBUE program in Rett syndrome. Efficacy endpoints are
always the most complex issue when you are leading the
way as a first treatment and there is no precedent to follow.
We went through a similar journey with FDA to align on
efficacy endpoints for Rett syndrome. Overall, we believe
that the success of DAYBUE de-risks the NNZ-2591 programs,
given the similarities in clinical profile, scientific rationale,
trial design and endpoints. Building on the Rett syndrome
experience, we are eager to embark on the first ever Phase 3
trial in Phelan-McDermid syndrome, aiming to provide a first
treatment option to that community.
2024 was another highly successful year for
the Neuren business, with record financial
performance, record sales of DAYBUE™ and
two more successful Phase 2 trial results
for NNZ-2591.
For the second year in succession Neuren received the
Australian Growth Company of the Year Award for Health
and Life Sciences. Across 2023 and 2024 our income from
Acadia for DAYBUE was A$445 million at 100% pre-tax
margin, which led to pro-forma cash of A$359 million at
31 December 2024. That cash has come from income and
not from capital raising. This puts us in an enviable position
to pursue the realisation of the value of NNZ-2591, which
can potentially be many multiples of DAYBUE. Relative to
our peers, we believe this provides a unique proposition for
investors – a valuation backstop as well as the potential to
add much more value using existing funds.
We are excited to also now be targeting hypoxic-ischemic
encephalopathy (HIE), a devastating type of brain injury
in newborns. We believe that NNZ-2591 can potentially
provide a highly differentiated form of treatment continuing
beyond acute treatment in the neonatal intensive care
unit to target both the acute effects and the long term
neurodevelopmental impairments resulting from HIE.
Despite this progress and “buy” recommendations from
all nine analysts that cover Neuren, the share price has
fallen significantly from its peak, which is frustrating
and disappointing. Neuren was the best performing ASX
200 stock in 2023, a year in which DAYBUE was approved
and launched, together with a first positive Phase 2 trial
result for NNZ-2591. In 2024 we were impacted negatively
by momentum trading, initially triggered by a switch to
negative sentiment about DAYBUE sales. In the early launch
period with limited experience there was heavy focus
in the investment community on quarterly sales rather
than the long-term opportunity for Neuren. We continue
to maintain that the launch has been very successful and
better than comparators, with net sales reaching US$348
million in the first full year of sales. Acadia has committed
substantial additional resources to expand DAYBUE in
the USA and has forecast continued growth in 2025. More
than 60% of patients currently on therapy have now been
treated for more than 12 months. This provides a very
stable base which means that sales have become much
more predictable. There are still 70% of the expanding
pool of diagnosed patients in the US who have not yet tried
treatment. This, together with the coming expansion into
Canada, Europe, Japan and potentially other countries,
provides substantial upside and a long-term growth
opportunity for Neuren. Acadia has done an impressive job
so far and with new commercial leadership and initiatives
in place is now in an even better position to maximise that
global opportunity. Most importantly, the stories from
families of benefits that children and adults with Rett
syndrome are experiencing on DAYBUE are heartening and
extremely motivating for the Neuren team.
During the past year we have been transitioning Neuren’s
capabilities from Phase 2 development to Phase 3
development. That has required some changes in the skills
and location of roles as well as a major focus on uplifting the
sophistication of Neuren’s quality systems. We thank the
Neuren team for their diligence through this transition and
for all their many achievements during the year.
We are also grateful to all our supportive shareholders and
can assure you that we will continue to evaluate all options
to maximise shareholder value.
Last but not least, we thank the patient communities
across the indications we are pursuing for their support,
determination and courage, which is so critical to achieving
the outcomes we are all striving for.
Patrick Davies
Chair
2
Jon Pilcher
CEO
Neuren Pharmaceuticals Limited Annual Repor t 2024
CHAIR AND CEO MESSAGE
CONTINUED
We are passionate about making a difference
to the lives of patients and their families
We aim to earn the respect of everyone
we deal with
NEUREN’S
VALUES
We are determined and creative to break
through barriers
We harness the power of collaboration and
different perspectives
We recognise the importance of all
stakeholders and endeavour to use
financial resources efficiently
We apply a quality mindset to everything
we do
Jon
Pilcher
CEO
Patrick
Davies
Chair
3
Neuren Pharmaceuticals Limited Annual Repor t 2024
O P E R AT I N G R E V I E W
Treating neurodevelopmental disorders
Rett
Fragile X
PhelanMcDermid
Angelman
Pitt Hopkins
Prader-Willi
MECP2
FMR1
SHANK3
UBE3A
TCF4
15q11-q13
Impaired communication between
neurons, abnormal formation/pruning
of dendrites & chronic inflammation
Neuren’s drugs
target the critical
role of IGF-1
in this upstream
process, using
analogs of peptides
that can be taken
orally as liquids
Severe impact on nearly every aspect of life
walking and balance issues
anxiety and hyperactivity
seizures
impaired communication
intellectual disability
impaired social interaction
impaired hand use
sleep disturbance
gastrointestinal problems
NEUREN’S GROUND -BREAKING THER APIES
IGF-1 and its metabolites play a significant role in regulating
these changes. In the mature brain, these molecules play an
important role in responding to disease, stress and injury.
Neuren focuses on developing treatments for debilitating
neurodevelopmental disorders that emerge in early
childhood and stem from problems in brain development
which lead to a wide range of serious issues affecting nearly
every aspect of life. These neurodevelopmental disorders
have severe life-long impact on the patients and their
families. Each neurodevelopmental disorder is caused
by a different genetic mutation, but in many cases, they
share similar symptoms and the common characteristic
of impaired connections and signalling between brain cells.
Trofinetide and NNZ-2591 mimic the function of the natural
molecules in the brain, however each drug is designed to
have a longer half-life in circulation, be suitable for use
as an oral medication, more readily cross the blood brain
barrier and have better stability for longer and easier
storage and shipping. Whereas many drugs typically exert
a specific effect on a specific target related to one symptom,
trofinetide and NNZ-2591 exert diverse effects which can
help to control or normalise abnormal biological processes
in the brain. This means that the target is to have a broad
impact on the disorder rather than aiming to treat one
symptom. An important feature is that both drugs can be
administered orally in a patient-friendly liquid dose.
Neuren currently has two novel patented drugs, trofinetide
and NNZ-2591, which potentially have broad utility in
the treatment of neurological disorders. Both drugs are
synthetic analogues of important molecules that occur
naturally in the brain and are involved in the biology of
IGF-1, a growth factor stimulated by growth hormone. In
the central nervous system, IGF-1 is produced by both of
the major types of brain cells – neurons and glia. IGF-1 in
the brain is critical both for normal development and to
maintain or restore the biological balance required for
normal functioning. During development, the brain and the
cells that comprise it change rapidly and in complex ways.
A critical feature of Neuren’s work to develop therapies
for each of these disorders is close collaboration with the
leading specialist physicians and with the well-organised
patient advocacy organisations.
4
Neuren Pharmaceuticals Limited Annual Repor t 2024
O P E R AT I N G R E V I E W
CONTINUED
THE IMPORTANCE OF ORPHAN DRUG
DESIGNATION
TROFINETIDE FOR RETT SYNDROME
Growing, sustainable income to Neuren from
DAYBUE™ (trofinetide) in the United States
The US Food and Drug Administration (FDA) and European
Medicines Agency (EMA) have both granted Orphan Drug
designation for trofinetide in Rett syndrome and Fragile X
syndrome and for NNZ-2591 in each of Phelan-McDermid,
Angelman and Pitt Hopkins syndromes. The FDA has also
granted Orphan Drug designation for Prader-Willi syndrome.
DAYBUE US Net Sales (US$m)
+ 9-16%
Orphan Drug designation is a special status that the
regulators may grant to a drug to treat a rare disease
or condition. Amongst other incentives, Orphan Drug
designation qualifies the sponsor of the drug for exclusivity
periods during which the regulators will not approve a
generic competitor product. These marketing exclusivity
periods are extremely valuable for the commercialisation
of Orphan Drugs. They provide additional protection, along
with patents, against generic competitors and potentially
can continue to provide protection after patent expiry.
The exclusivity periods after marketing authorisation of
products approved for pediatric use are 7.5 years in the
United States and 12 years in the EMA region. Japan, South
Korea and Taiwan also have Orphan Drug programs.
+ 97%
405
348
380
177
CY2023 (Apr - Dec)
DAYBUE US Net Sales (US$m)
CY2024
CY2025 Acadia
Guidance
US Royalty to Neuren(A$m)
As well as the exclusivity periods, Orphan Drugs have many
other commercial
advantages
compared
existing
DAYBUE
US Net
Saleswith
(US$m)
+ 9-16%
markets that have apparently attractive
large sales in which
405
established products and companies
have to be displaced.
+ 9-16%
The serious and urgent unmet348
need results in a more
405
380
+ 97%and pricing environment and
supportive regulatory
strong
348
engagement from the patient community and leading
380
+ 97%
physicians. Historical data indicates a higher probability
of achieving regulatory approval and the potential for
177
immediate access to known patients means that a large
sales organisation
177 is less important.
US Royalty to Neuren(A$m)
+ 11-19%
+ 110%
56
+ 110%
56
+ 11-19%
67
67
62
62
27
27
In short, the Orphan Drug business model targets a
leadership position in markets with urgent need, at an
attractive price and with a higher probability of getting
to market.
CY2023 (Apr - Dec)
CY2024
CY2025 Acadia
The neurodevelopmental disorders that NeurenGuidance
is aiming to
(Apr
- Dec) however
CY2024
CY2025
Acadia
treatCY2023
are “rare
diseases”,
they are not
“ultra-rare”,
Guidance
and in each disorder there are tens of thousands of potential
patients around the world.
CY2023
CY2024
CY2025E*
CY2023
CY2024
CY2025E*
* Based
on CY25 Acadia DAYBUE
US Net Sales Guidance
of
US$380-405m, 10% of DAYBUE net sales up to US$250m and
12% of DAYBUE net sales between US$250m and US$500m,
and AUDUSD of 0.65
COMMERCIAL EXCLUSIVIT Y
In March 2023, Neuren’s partner for trofinetide, Acadia
Pharmaceuticals (NASDAQ: ACAD), received FDA approval of
DAYBUE™ (trofinetide) for the treatment of Rett syndrome in
adult and pediatric patients two years of age and older. On
17 April 2023, Acadia launched DAYBUE™ (trofinetide) in the
United States as the first ever approved treatment for Rett
syndrome. Access to DAYBUE has been well supported by
Medicaid and private health insurance payors.
In addition to the primary protection of the important
exclusivity periods from Orphan Drug designation explained
above, Neuren has additional commercial protection from
issued patents and pending patent applications, which
extend as far as 2041. Since trofinetide and NNZ-2591
are new chemical entities, following the first marketing
authorisation for each drug, the term of one patent may
potentially be extended by up to 5 years in many countries,
including the United States, Europe and Japan.
5
C
Neuren Pharmaceuticals Limited Annual Repor t 2024
O P E R AT I N G R E V I E W
CONTINUED
Net sales of DAYBUE in 2024 were US$348.4 million, with
sequential growth in each quarter and record net sales of
US$96.7 million in Q4 2024. These sales generated royalty
income for Neuren in 2024 of A$56 million.
US Net Sales (US$m)
CY23 DAYBUE US$177m
CY24 DAYBUE US$348m (up 97% y-o-y)
87
67
76
85
91
97
23
Q2 2023 Q3 2023 Q4 2023 Q1 2024 Q2 2024 Q3 2024 Q4 2024
DAYBUE US
Comparable Drug Launch (US)^
^ For illustrative purposes only. Comparable Orphan Drug has different patient/clinician experience, approval and distribution/logistical dynamics
1. Latest stats based on Acadia 4Q and full year 2024 Earnings Presentation 26 February 2025 and 43rd Annual JP Morgan Healthcare Conference Presentation 14 January 2025
^ For illustrative purposes only. Comparable Orphan Drug
has different patient/clinician experience, approval and
distribution/logistical dynamics
920 patients received DAYBUE in Q4 2024 and 62% of
currently active patients had been on therapy for 12 months
or longer. Acadia continues to collect and report realworld experience in the LOTUS study, with the majority of
caregivers reporting meaningful improvements in patients.
The number of diagnosed Rett patients in the US has
grown from approximately 4,500 at the launch of DAYBUE
to between 5,500 and 5,800. Prevalence studies suggest
the total number of patients may be 6,000 to 9,000. Acadia
has provided guidance for growth in US net sales in 2025 to
between US$380 million and US$405 million. Q1 2025 net
sales will be lower than Q4 2024 due to seasonal impacts,
which is consistent with the previous year. With 70% of the
diagnosed patients yet to try DAYBUE, there is substantial
potential for growth in the US. In January 2025, Acadia
announced initiatives to accelerate adoption, in particular
among the 65% of patients that are treated outside the
Rett syndrome Centers of Excellence. Acadia is expanding
its field force by approximately 30%, optimizing patient
support, launching branded Direct-to-Consumer campaigns
to showcase DAYBUE benefits and utilizing a range of
communication channels to bring the DAYBUE clinical
data to life for both physicians and families.
A characteristic of all long-term medicines is that not
all patients who commence treatment will persist with
treatment. Furthermore, for patients and caregivers,
adjusting to a novel treatment regimen can take time,
especially when it is the first treatment ever to become
available. The number of patients commencing treatment
and the proportion that persist with treatment long-term
are key factors in the sales outcome. That persistency rate
in the real world has consistently tracked at more than 10
percentage points above the clinical trial experience and
has been stable at approximately 50% after 12 months
of treatment. In Q4 2024 discontinuations improved by
approximately 15% compared with Q3. The LOTUS study
indicates that initial dose titration improves tolerability,
suggesting that the future persistence rate for new patients
can be higher than the early experience after launch.
Further information about DAYBUE, including prescribing
information can be accessed at www.DAYBUE.com
6
Neuren Pharmaceuticals Limited Annual Repor t 2024
O P E R AT I N G R E V I E W
CONTINUED
NEUREN’S ATTR ACTIVE ECONOMICS FROM
DAYBUE (TROFINETIDE) IN NORTH AMERIC A
In October 2024, Health Canada approved Acadia’s New
Drug Submission for DAYBUE and Acadia anticipates first
sales in Q3 2025, pending price negotiations. Canada net
sales will be added to US net sales to give total net sales for
calculation of Neuren’s North America royalties and sales
milestone payments. In Canada, the prevalence of Rett
Syndrome is estimated to be 600 to 900 patients.
In 2024, Neuren earned income from DAYBUE of A$213
million. In addition to royalties of A$56 million, Neuren
received a sales milestone payment of A$80.5 million earned
on achievement of the first in a series of four thresholds of
total annual net sales of DAYBUE in North America, due to
net sales for 2024 exceeding US$250 million.
LONG TERM GROW TH OPPORTUNIT Y FOR
TROFINETIDE THROUGH GLOBAL EXPANSION
Neuren also earned A$76.5 million from Acadia, being one
third of the market value of the Rare Pediatric Disease
Priority Review Voucher (PRV) that was awarded to Acadia
by the FDA upon marketing authorisation of DAYBUE.
Acadia completed the sale of the PRV for US$150 million
in December 2024.
In July 2023 Neuren and Acadia expanded their partnership
for trofinetide from North America to worldwide. Neuren
received US$100 million up-front and is eligible to receive
milestone payments and royalties related to development
and commercialization of trofinetide outside North America
as set out in the table below.
Neuren is eligible to receive ongoing royalties on net sales
of trofinetide in North America, plus milestone payments
of up to US$350m on achievement of a series of four
America
thresholds of totalNorth
annual
net sales. No royalties or similar
costs are
payable
by Neuren to third parties, which means
US$10m
U
upfront
in 2018
Neuren’s revenue from Acadia flows through to pre-tax
U
US$10m
2022
following
of NDA for payments
review
profit. in
The
royalty
ratesacceptance
and sales milestone
are
related
to
the
total
amount
of
annual
net
sales
ofUS
trofinetide
U
US$40m in 2023 following 1st commercial sale in the
in all indications in North America, as set out in the
U
US$50m
In 2024
one third share of Priority Review Voucher
following
tables:
Outside North America
US$100m
U
upfront in 2023
US$35m
following 1st commercial sale in Europe
US$15m
following 1st commercial sale in Japan
US$10m
following 1st commercial sale of a 2 nd indication
Europe
awarded to Acadia (sold for US$150m)
US$55m
following 1st commercial sale of a 2 nd indication
Outside North America
Japan
US$100m upfront in 2023
U
Sales milestones
On achievement of escalating annual net
1st commercial sale in Europe
US$35m following
sales thresholds:
Europe: up to US$170m
US$15m following 1st commercial sale in Japan
Japan: up to US$110m
: up to US$83m
US$10m following RoW
1st commercial
sale of a 2 nd indication
Europe
Tiered royalties
Mid - teens to low - 20s % of net sales
US$4m following 1st commercial sale of a 2 nd indication
Japan
Milestone payments related to Fragile X
US$4m
North America
Tiered U
Royalty Rates
Sales Milestones
US$10m
upfront in 2018
(%
of net sales)
Net Sales
onefor review
US$10m in 2022 following acceptance
ofinNDA
U
Annual
Net Sales
Rates
calendar year US$m
US$40m in 2023 following 1st commercial sale in the US
U
≤US$250m
10%
≥US$250m
50
US$50m In 2024 one third share of Priority Review Voucher
U
>US$250m,
≤US$500m
12%
≥US$500m
50
awarded to Acadia (sold for US$150m)
>US$500m,
≤US$750m
≥US$750m
US$55m
Milestone14%
payments related
to Fragile X 100
>US$750m
Tiered Royalty Rates 15%
(% of net sales)
≥US$1bn
150
Sales Milestones
Annual Net Sales
Rates
Net Sales in one
calendar year US$m
≤US$250m
10%
≥US$250m
50
>US$250m, ≤US$500m
12%
≥US$500m
50
>US$500m, ≤US$750m
14%
≥US$750m
100
>US$750m
15%
≥US$1bn
150
Salesversion
milestones
On achievement
of escalating annual net
A redacted
of the expanded
licence agreement
sales thresholds:
between Neuren and Acadia was filed with the US Securities
Europe: up to US$170m
and Exchange Commission as a material contract exhibit to
Japan: up to US$110m
Acadia’s 2023 10-K Annual Report, which
is available
to view
RoW : up
to US$83m
via the SEC Filings section of Acadia’s website.
Tiered royalties
Mid - teens to low - 20s % of net sales
In January 2025, Acadia submitted a Marketing
Authorization Application (MAA) to the European Medicines
Agency (EMA) for trofinetide for the treatment of Rett
syndrome in adults and pediatric patients two years of
age and older. Acadia anticipates potential approval in Q1
2026. If granted marketing authorization, trofinetide will be
the first and only approved therapy for Rett syndrome in
the European Union. In the meantime, Acadia anticipates
initiating Managed Access Programs in Europe in Q2 2025,
which will provide valuable real-world experience of
treatment for European families and physicians in advance
of full commercial launch.
7
Neuren Pharmaceuticals Limited Annual Repor t 2024
O P E R AT I N G R E V I E W
CONTINUED
For Japan, Acadia has had productive discussions with the regulatory agency (PMDA) and plans to initiate a small clinical study
by Q3 2025 to support a marketing application.
There is urgent unmet need for a treatment for Rett syndrome around the world, evidenced by communications received from
families, patient support groups and physicians. Acadia is assessing a strategic approach to make DAYBUE available in select
markets through named patient programs in 2025.
Canada
600 - 900 Rett patients 1
Approved in Oct 2024
First sales in Q3 2025
US
6,000 - 9,000 Rett patients 1
Launched in Apr 2023
Europe
9,000 - 12,000 Rett patients 1
MAA filed with potential approval
Q1 2026
Initiation of Managed Access
Program Q2 2025
Acadia building EU leadership and
launch teams
1
Japan
1,000 - 2,000 Rett patients 1
PMDA discussions
ongoing; clinical study start
by Q3 2025 to support
marketing application
Acadia estimates
i ABOUT RETT SYNDROME
Rett syndrome is a seriously debilitating and life-threatening neurological disorder. It is first recognized in infancy
and seen predominantly in girls, but can occur very rarely in boys. At diagnosis, Rett syndrome has often been
misdiagnosed as autism, cerebral palsy, or non-specific developmental delay. Most cases of Rett syndrome are caused
by mutations on the X chromosome on a gene called MECP2. Rett syndrome strikes all racial and ethnic groups and has
been estimated to occur worldwide in 1 of every 10,000 to 15,000 female births, causing problems in brain function that
are responsible for cognitive, sensory, emotional, motor and autonomic function. These problems can include learning,
speech, sensory sensations, mood, movement, breathing, cardiac function, and even chewing, swallowing, and
digestion. Rett syndrome symptoms appear after an early period of apparently normal or near normal development
until six to eighteen months of life, when there is a slowing down or stagnation of skills. A period of regression then
follows, with loss of communication skills and purposeful hand use, loss or impairment of walking, and the onset of
stereotypic hand movements. Other problems frequently include seizures and erratic breathing patterns, an abnormal
side-to-side curvature of the spine (scoliosis), and sleep disturbances.
8
Neuren Pharmaceuticals Limited Annual Repor t 2024
O P E R AT I N G R E V I E W
CONTINUED
NNZ-2591 FOR MULTIPLE
NEURODEVELOPMENTAL DISORDERS
Successful Phase 2 clinical trials across
three syndromes
Neuren is developing NNZ-2591 for multiple serious
neurodevelopmental disorders with different genetic origins
that emerge in early childhood and have no or limited
approved treatment options. The estimated number of
potential patients being targeted across these disorders
is more than five times larger than Rett syndrome.
In May 2024, Neuren announced positive top-line results
from the Phase 2 clinical trial of NNZ-2591 in children with
PTHS. After treatment for 13 weeks, 9 out of 11 children
showed improvement assessed by clinicians and significant
improvement was observed by both clinicians and
caregivers in clinically important aspects of PTHS, including
communication, social interaction, cognition and motor
abilities. NNZ-2591 was well tolerated and demonstrated
a good safety profile. Neuren recently announced that the
FDA has granted Fast Track designation for NNZ-2591 for
the treatment of PTHS. Fast Track is designed to facilitate
the development and expedite the review of drugs to treat
serious conditions.
Neuren’s programs for Phelan-McDermid syndrome (PMS),
Pitt Hopkins syndrome (PTHS), Angelman syndrome
(AS) and Prader-Willi syndrome (PWS) have all been
granted Orphan Drug designation by the FDA and are
being developed under Investigational New Drug (IND)
applications. In designing and executing the NNZ-2591
development program, Neuren has been able to leverage
the extensive and highly relevant experience the Neuren
team has gained from the trofinetide Rett syndrome
program across manufacturing, non-clinical, clinical
and regulatory.
In August 2024, Neuren announced positive top-line
results from the Phase 2 clinical trial of NNZ-2591 in
children with AS. After treatment for 13 weeks, 11 out of
13 children showed improvement assessed by clinicians,
with improvements seen in clinically important aspects
of AS. In the 3-12 years age group all 8 children showed
improvement.
The FDA has also granted Rare Pediatric disease Designation
for NNZ-2591 in each of PMS, PTHS and AS. With this
designation in place, Neuren may be awarded a PRV if the
Rare Pediatric Disease PRV program is reauthorized by the
US Congress and NNZ-2591 receives marketing authorisation
for any of these indications by the FDA. The Rare Pediatric
Disease PRV program is designed to incentivize drug
development for serious rare pediatric diseases. If awarded,
a PRV can be redeemed to receive priority review for a
different product or sold to another sponsor. As noted
above, Neuren’s partner Acadia received a PRV on marketing
authorization of DAYBUE in Rett syndrome and sold the PRV
for US$150 million.
The positive results of NNZ-2591 in PTHS and AS followed
the announcement of positive top-line results from the
Phase 2 clinical trial of NNZ-2591 in children with PMS.
Phase 2 trial results validating multi-indication platform
Phase 2 trial results validating multi-indication platform
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