AI Drug Discovery for Pharma and Biotech

Drug discovery

22

drugs

With orphan designations

Overview

Niemann-Pick disease type C (NPC) is a rare, autosomal recessive lysosomal storage disorder caused by NPC1 or NPC2 gene mutations, disrupting intracellular cholesterol and lipid transport. This leads to progressive neurovisceral accumulation, resulting in hepatosplenomegaly, vertical supranuclear gaze palsy, cerebellar ataxia, dystonia, cognitive decline, and psychiatric manifestations. Diagnosis spans from infancy to adulthood, with variable progression and fatal neurodegenerative outcomes [1][5][6][13][16].

Population

Birth prevalence ranges from 1/45,000 to 1/286,000 globally, with ~1–3 cases per million in the U.S. Onset occurs prenatally to adulthood, though pediatric presentations dominate [2][6][14][18].

Burden

Median survival ranges from 10–25 years, with mortality driven by aspiration pneumonia, neurodegeneration, or liver failure. Chronic disability necessitates intensive care coordination, significant healthcare costs, and psychosocial strain on families [2][5][14][16][18].

Therapies

  • Miglustat: Reduces glycosphingolipid synthesis, slowing neurological progression [1][7][19].

  • 2-hydroxypropyl-β-cyclodextrin (HPβ-CD): Investigational therapy showing extended survival in trials [3][7][19].

  • Arimoclomol: Recently FDA-approved, enhancing heat shock proteins to mitigate protein misfolding [15][19].

  • Supportive care (e.g., multidisciplinary symptom management, seizure control) [1][5][9].

Categories: rare genetic diseases, rare inborn errors of metabolism, rare neurological diseases, rare ophthalmic disorders, rare respiratory diseases, rare transplant-related disorders

Research Papers

708 drug discovery papers related to Niemann-Pick disease type C, with 4 first-in-class and 18 next-in-class early-stage therapies forecasted to outperform the average preclinical success rate. Recent publications:

708 drug discovery papers related to Niemann-Pick disease type C, with 4 first-in-class and 18 next-in-class early-stage therapies forecasted to outperform the average preclinical success rate. Recent publications:

2026-07-09 | Molecular and Structural Basis of Cardiac Remodelling in Niemann-Pick Type C

Niemann-Pick disease type C (NPC) is a rare autosomal recessive neurodegenerative lysosomal storage disease caused by pathogenic variants in NPC1 or NPC2. Sudden death can occur due to seizures, but cardiac involvement has not been well defined. We performed 12-lead electrocardiograms (ECG) in 14 adult NPC patients (8 male, 6 female). Cardiac structure and function were examined in Npc1-/- adult mouse hearts, alongside wild-type controls. Glycosphingolipid accumulation was quantified by high-performance liquid chromatography, fibrosis and collagen deposition were quantified using Massons Trichrome (M&T) and Picrosirius Red (PR) staining. Whole-heart morphology, including chamber size and wall thickness, was assessed. Ex vivo ECG recordings assessed conduction abnormalities and arrhythmias. RNA-seq transcriptomics characterised molecular pathways altered in Npc1-/- hearts. 8/14 patients showed ECG abnormalities including abnormal QRS transitions (N=8), increased QRS amplitude (N=4), fascicular block (N=2), and abnormal T wave inversion (N=1). 13 patients also had transthoracic echocardiograms identifying mildly impaired LV systolic function (N=2) and increased wall thickness/LV mass (N=4). In Npc1-/- mice, age‑related glycosphingolipid accumulation was associated with pronounced ventricular fibrotic remodelling. There was a significant increase in stained connective tissue area and connective tissue to cardiac tissue ratio in both MT and PR staining. ECG from Langendorff-perfused Npc1-/- hearts showed QT prolongation and atrioventricular conduction abnormalities under isoprenaline stress. Transcriptomics revealed major changes in Npc1-/- hearts, consistent with histological fibrosis and linking NPC to inflammation-driven remodelling and arrhythmogenesis. These findings support routine cardiac screening in NPC patients and highlight the need for further studies to improve management and treatment.

Open article ↗



2026-07-09 | Deep Intronic NPC1 Variants in Niemann-Pick Disease Type C: A Pediatric Case Report and Systematic Review.

We report a 16-year-old girl with progressive ataxia, gaze palsy, and psychotic symptoms suggestive of Niemann-Pick disease type C (NPC). Despite strong clinical and biochemical evidence, including elevated N-palmitoyl-O-phosphocholine-serine (PPCS or lysosphingomyelin-509 [lyso-SM-509]), conventional genetic testing was inconclusive. RNA sequencing of fibroblasts revealed a homozygous NPC1 intronic variant (c.3246-25A > G) causing aberrant splicing. Miglustat was initiated, leading to clinical stabilization. A systematic literature review identified 12 patients with intronic splice-altering variants located outside the canonical splice donor and acceptor regions, including variants situated more than 20 bp from exon-intron boundaries, predominantly affecting NPC1. Most patients presented with juvenile- or adult-onset disease and showed heterogeneous biomarker profiles. This case highlights the diagnostic utility of RNA sequencing in unsolved NPC cases and emphasizes its role in uncovering cryptic pathogenic variants, enabling timely diagnosis and treatment. Intronic variants should be considered in genetically elusive but clinically compatible NPC presentations.

Open article ↗



2026-07-01 | Technical Note: Focused ultrasound-mediated blood-brain barrier opening for delivery of LNP-packaged modRNA therapy in a mouse model of Niemann-Pick Disease Type C

Abstract Efficient delivery of molecular therapies to the central nervous system (CNS) remains a major barrier to treating neurogenetic disorders such as Niemann–Pick type C (NPC) disease. Focused ultrasound–mediated blood–brain barrier opening (FUS-BBBO) has emerged as a non-invasive strategy to enhance delivery of systemically administered therapeutics. In this study, we evaluated whether FUS-BBBO could enable delivery of lipid nanoparticle (LNP)-packaged modified mRNA (modRNA) to the cerebellum in an NPC mouse model. A pilot study in wild-type mice demonstrated successful FUS-mediated BBB opening, delivery of LNP-packaged GFP mRNA, and subsequent protein expression in the cerebellum. We then performed a controlled study in NPC mice comparing delivery of LNP-GFP and LNP-NPC modRNA using intravenous administration with and without FUS-BBBO. BBB opening was confirmed by contrast-enhanced MRI in FUS-treated animals. Quantitative PCR revealed the presence of GFP mRNA in the cerebellum following FUS-BBBO, whereas NPC mRNA was minimal or undetectable across groups. However, no GFP or NPC1 protein expression was detected in the cerebellum by western blot in any experimental group. Consistent with this, no therapeutic effect on Purkinje cell survival was observed. These results demonstrate that while FUS-BBBO reliably induces BBB opening and can facilitate limited delivery of LNP-packaged mRNA to the brain, this did not translate into detectable protein expression or therapeutic benefit in the NPC model under the conditions tested. This discrepancy between successful delivery in wild-type mice and lack of efficacy in diseased animals points to potential important biological and/or formulation-dependent barriers that must be addressed to enable effective CNS delivery of LNP-based mRNA therapies.

Open article ↗



2026-07-09 | Molecular and Structural Basis of Cardiac Remodelling in Niemann-Pick Type C

Niemann-Pick disease type C (NPC) is a rare autosomal recessive neurodegenerative lysosomal storage disease caused by pathogenic variants in NPC1 or NPC2. Sudden death can occur due to seizures, but cardiac involvement has not been well defined. We performed 12-lead electrocardiograms (ECG) in 14 adult NPC patients (8 male, 6 female). Cardiac structure and function were examined in Npc1-/- adult mouse hearts, alongside wild-type controls. Glycosphingolipid accumulation was quantified by high-performance liquid chromatography, fibrosis and collagen deposition were quantified using Massons Trichrome (M&T) and Picrosirius Red (PR) staining. Whole-heart morphology, including chamber size and wall thickness, was assessed. Ex vivo ECG recordings assessed conduction abnormalities and arrhythmias. RNA-seq transcriptomics characterised molecular pathways altered in Npc1-/- hearts. 8/14 patients showed ECG abnormalities including abnormal QRS transitions (N=8), increased QRS amplitude (N=4), fascicular block (N=2), and abnormal T wave inversion (N=1). 13 patients also had transthoracic echocardiograms identifying mildly impaired LV systolic function (N=2) and increased wall thickness/LV mass (N=4). In Npc1-/- mice, age‑related glycosphingolipid accumulation was associated with pronounced ventricular fibrotic remodelling. There was a significant increase in stained connective tissue area and connective tissue to cardiac tissue ratio in both MT and PR staining. ECG from Langendorff-perfused Npc1-/- hearts showed QT prolongation and atrioventricular conduction abnormalities under isoprenaline stress. Transcriptomics revealed major changes in Npc1-/- hearts, consistent with histological fibrosis and linking NPC to inflammation-driven remodelling and arrhythmogenesis. These findings support routine cardiac screening in NPC patients and highlight the need for further studies to improve management and treatment.

Open article ↗



2026-07-09 | Deep Intronic NPC1 Variants in Niemann-Pick Disease Type C: A Pediatric Case Report and Systematic Review.

We report a 16-year-old girl with progressive ataxia, gaze palsy, and psychotic symptoms suggestive of Niemann-Pick disease type C (NPC). Despite strong clinical and biochemical evidence, including elevated N-palmitoyl-O-phosphocholine-serine (PPCS or lysosphingomyelin-509 [lyso-SM-509]), conventional genetic testing was inconclusive. RNA sequencing of fibroblasts revealed a homozygous NPC1 intronic variant (c.3246-25A > G) causing aberrant splicing. Miglustat was initiated, leading to clinical stabilization. A systematic literature review identified 12 patients with intronic splice-altering variants located outside the canonical splice donor and acceptor regions, including variants situated more than 20 bp from exon-intron boundaries, predominantly affecting NPC1. Most patients presented with juvenile- or adult-onset disease and showed heterogeneous biomarker profiles. This case highlights the diagnostic utility of RNA sequencing in unsolved NPC cases and emphasizes its role in uncovering cryptic pathogenic variants, enabling timely diagnosis and treatment. Intronic variants should be considered in genetically elusive but clinically compatible NPC presentations.

Open article ↗



2026-07-01 | Technical Note: Focused ultrasound-mediated blood-brain barrier opening for delivery of LNP-packaged modRNA therapy in a mouse model of Niemann-Pick Disease Type C

Abstract Efficient delivery of molecular therapies to the central nervous system (CNS) remains a major barrier to treating neurogenetic disorders such as Niemann–Pick type C (NPC) disease. Focused ultrasound–mediated blood–brain barrier opening (FUS-BBBO) has emerged as a non-invasive strategy to enhance delivery of systemically administered therapeutics. In this study, we evaluated whether FUS-BBBO could enable delivery of lipid nanoparticle (LNP)-packaged modified mRNA (modRNA) to the cerebellum in an NPC mouse model. A pilot study in wild-type mice demonstrated successful FUS-mediated BBB opening, delivery of LNP-packaged GFP mRNA, and subsequent protein expression in the cerebellum. We then performed a controlled study in NPC mice comparing delivery of LNP-GFP and LNP-NPC modRNA using intravenous administration with and without FUS-BBBO. BBB opening was confirmed by contrast-enhanced MRI in FUS-treated animals. Quantitative PCR revealed the presence of GFP mRNA in the cerebellum following FUS-BBBO, whereas NPC mRNA was minimal or undetectable across groups. However, no GFP or NPC1 protein expression was detected in the cerebellum by western blot in any experimental group. Consistent with this, no therapeutic effect on Purkinje cell survival was observed. These results demonstrate that while FUS-BBBO reliably induces BBB opening and can facilitate limited delivery of LNP-packaged mRNA to the brain, this did not translate into detectable protein expression or therapeutic benefit in the NPC model under the conditions tested. This discrepancy between successful delivery in wild-type mice and lack of efficacy in diseased animals points to potential important biological and/or formulation-dependent barriers that must be addressed to enable effective CNS delivery of LNP-based mRNA therapies.

Open article ↗



Access all drug discovery articles and probability of success in trials forecasts:

Access all drug discovery articles and probability of success in trials forecasts:

Drug Discovery Landscape

22 orphan drug designations for Niemann-Pick disease type C, including 4 approved therapies.

22 orphan drug designations for Niemann-Pick disease type C, including 4 approved therapies.

Drug

Therapy type

Regulator

Orphan designation

Approval

Sponsor

cholesteryl oleate

other

FDA

2024-10-28

Meizon Innovation Pty Ltd.

AAV9-hNPC1 is an Adeno-Associated Virus 9 (AAV9) vector expressing a human cDNA encoding Niemann-Pick C1 (NPC1), under control of the Elongation Factor 1 alpha Short (EF1S) promoter

gene therapies

FDA

2024-08-23

National Human Genome Research Institute (NHGRI), National Institutes of Health (NIH)

Adeno-associated viral vector serotype 9 containing the human NPC1 gene

gene therapies

EMA

2023-10-13

UCL Research Limited

Adeno-associated viral vector serotype 9 containing the human NPC1 gene

gene therapies

FDA

2023-09-06

Bloomsbury Genetic Therapies Ltd.

biphenyl-substituted L-ido configured deoxynojirimycin derivative

small molecules

FDA

2022-03-07

Azafaros BV

levacetylleucine [Aqneursa]

small molecules

FDA

2021-09-08

2024-09-24

IntraBio Inc.

Miglustat

small molecules

FDA

2021-02-02

Edenbridge Pharmaceuticals LLC

Ursodeoxycholic acid

small molecules

FDA

2018-04-26

IntraBio Inc.

N-acetyl-DL-leucine

small molecules

FDA

2018-02-22

IntraBio Inc.

Ursodeoxycholic acid

small molecules

EMA

2017-05-22

IntraBio Ireland Ltd

Acetylleucine [Aqneursa]

small molecules

EMA

2017-03-20

2026-01-20

IntraBio Ireland Ltd

arimoclomol [Miplyffa]

small molecules

FDA

2015-01-13

2024-09-20

Zevra Denmark A/S

Arimoclomol citrate

small molecules

EMA

2014-11-19

Zevra Denmark A/S

allopregnanolone

small molecules

FDA

2013-07-12

La Jolla Pharmaceutical Company, Inc.

2-hydroxypropyl-ß-cyclodextrin

small molecules

EMA

2013-04-26

Eliquent Life Sciences Limited

Escherichia coli heat-shock protein 70

proteins

EMA

2013-03-12

Orphazyme A/S

2-hydroxypropyl-B-cyclodextrin

small molecules

FDA

2013-02-18

Mandos LLC

Hydroxy-propyl-beta-cyclodextrin

small molecules

EMA

2011-08-30

Boyd Consultants Limited

Hydroxy-Propyl-Beta-Cyclodextrin

small molecules

FDA

2010-05-17

Cyclo Therapeutics, Inc.

miglustat

small molecules

FDA

2008-11-12

Actelion Pharmaceuticals Ltd

Miglustat [Zavesca]

small molecules

EMA

2006-02-16

[INACTIVE] Actelion Registration Limited

Recombinant human acid sphingomyelinase [Xenpozyme]

proteins

EMA

2001-09-19

2022-06-27

Sanofi B.V.

Explority AI logo

228 Park Ave S,
New York, USA.

At Explority, we build first-of-its-kind AI to bring clarity to the earliest and riskiest stages of pharmaceutical research by forecasting which therapies are most likely to succeed. Explority AI web and mobile applications are properties of the Explority AI Inc., a company registered in the United States (File No. 10320493).
For all questions: support@explority.ai

Copyright © 2026 Explority AI Inc.

Explority AI logo

228 Park Ave S,
New York, USA.

At Explority, we build first-of-its-kind AI to bring clarity to the earliest and riskiest stages of pharmaceutical research by forecasting which therapies are most likely to succeed. Explority AI web and mobile applications are properties of the Explority AI Inc., a company registered in the United States (File No. 10320493).
For all questions: support@explority.ai

Copyright © 2026 Explority AI Inc.

Explority AI logo

228 Park Ave S,
New York, USA.

At Explority, we build first-of-its-kind AI to bring clarity to the earliest and riskiest stages of pharmaceutical research by forecasting which therapies are most likely to succeed. Explority AI web and mobile applications are properties of the Explority AI Inc., a company registered in the United States (File No. 10320493).
For all questions: support@explority.ai

Copyright © 2026 Explority AI Inc.