Autism Spectrum Disorder (ASD): Emerging Therapies

Autism Spectrum Disorder (ASD) is a developmental disability that can cause significant social, communication, and behavioral challenges. People with ASD may communicate, interact, behave, and learn in ways that are different from most other people. The learning, thinking, and problem-solving abilities of people with ASD can range from gifted to severely challenged. They might repeat certain behaviors and might not want to change in their daily activities. Many people with ASD also have different ways of learning, paying attention, or reacting to things. A diagnosis of ASD now includes several conditions that used to be diagnosed separately i.e., autistic disorder, pervasive developmental disorder not otherwise specified (PDD-NOS), and Asperger syndrome. These conditions are now knowns as an autism spectrum disorder.

According to the U.S. Centers for Disease Control and Prevention (CDC) approximately, 1 in 68 children in the United States have been diagnosed with Autism. Autism is the third most common developmental disability. According to one of the epidemiological studies by “Action for Autism”, the prevalence rate is 1.7 million (estimated rate of 1 in 250 children). It is most frequent among the boys in comparison to the girls.

There is currently no approved drug on the market that treats the core symptoms of Autism. Hence, there are various pharmaceutical companies have the potential to transform the existing market by developing robust pioneering pipeline clinical programs to treat Autism spectrum disorder. Several companies such as Otsuka Pharmaceutical, Nobelpharma, GW Research Ltd, Hoffmann-La Roche, Allergan & Curemark are developing novel therapies.

Otsuka Pharmaceutical (Brexpiprazole)

Brexpiprazole is a molecule discovered by Otsuka and co-developed by Otsuka and Lundbeck. The efficacy of brexpiprazole may be mediated through a combination of partial agonist activity at serotonin 5-HT1A and dopamine D2 receptors, and antagonist activity at serotonin 5-HT2A receptors. Brexpiprazole exhibits high affinity (subnanomolar) for these receptors as well as for noradrenaline alpha1B/2C receptors.

Brexpiprazole, is currently study under the clinical trial of Phase III. The purpose of this study is to find out about the potential benefits and safety of brexpiprazole in children and adolescent subjects, aged 5 to 17, with irritability associated with autism spectrum disorder.

GW Research Ltd (GWP42006/CBDV)

GWP42006 is the non-psychoactive cannabinoid cannabidivarin (CBDV) extracted from the cannabis plant. It has been evaluating GWP42006 in both general and syndromic pre-clinical models of ASD yielding promising signals on cognitive and social endpoints as well as repetitive behavior. These include both genetically determined abnormalities of neurobehavioral and chemically-induced models. A Phase IIa proof of concept study of a pipeline compound GWP42006 is being evaluated to treat ASD.

Hoffmann-La Roche (Balovaptan)

Balovaptan (RG7314) is a potent and specific small molecule antagonist of the V1A vasopressin receptor, which is implicated in modulating emotional processing and key social deficits exhibited in patients with Autism Spectrum Disorders. A phase III clinical trial is evaluating balovaptan for the treatment of patients with autism spectrum disorder.

Hoffmann-La Roche (RG7816)

RG7816 is a small molecule highly selective positive allosteric modulator of the GABAA α5 receptor, which is expressed in key brain regions for autism spectrum disorder.

Allergan (Cariprazine)

Cariprazine has a high affinity for Dopamine D3 receptors acting as a partial agonist at D3 receptors. Cariprazine is primarily metabolized by CYP3A4 into Desmethyl Cariprazine (DCAR) and DCAR is then further metabolized by CYP3A4 into Didesmethyl Cariprazine (DDCAR). Cariprazine, is evaluated under the clinical study of Phase-I. This study would be a multi-center, open-label, parallel-group, multiple-dose study in up to 24 male and female participants aged 5 through 17 years, inclusive, with Autism Spectrum Disorder (ASD)

Curemark (CM-AT)

CM-AT, is lead drug candidate, is designed to enhance protein digestion thereby potentially restoring the pool of essential amino acids. Essential amino acids play a critical role in the expression of several genes important to neurological function and serve as precursors to key neurotransmitters such as serotonin and dopamine.CM-AT has completed enrollment in The Blüm Study, a Phase III clinical trial for CM-AT in children aged 3-8 years old. CM-AT has received Fast Track Designation from the U.S. Food and Drug Administration (FDA). FDA has also granted Curemark a rolling review of its New Drug Application for CM-AT.

Autism Spectrum Disorder (ASD) Pipeline Landscape

Company NameProduct NameStage of DevelopmentMechanism of ActionRoute of Administration
Otsuka Pharmaceutical Brexpiprazole/OPC-34712/ LuAF41156  Phase IIIDopamine D2 Receptor Partial agonists; Serotonin 1A Receptor Partial AgonistsOral
NobelpharmaNPC-15 GranulesPhase II/III_oral
GW Research LtdGWP42006/ CBDV  Phase IICannabinoid Receptor ModulatorsOral
Hoffmann-La RocheBalovaptan/RO5285119/RO7017773Phase IIIAntagonist of the V1A Vasopressin ReceptorOral
Hoffmann-La RocheRG7816Phase I_
AllerganCariprazinePhase ICYP3A4 InhibitorOral
CuremarkCM-ATPhase IIIEnzyme ModulatorsOral

Emerging Therapies: Multiple Sclerosis

Multiple sclerosis (MS) is a condition that can affect the brain and spinal cord, causing a wide range of potential symptoms, including problems with vision, arm or leg movement, sensation, or balance. It is a chronic autoimmune inflammatory disease of the central nervous system that damage and scars the sheath, and potentially the underlying nerves. Multiple sclerosis is affecting 2.3 million people worldwide, with females more affected than males.

According to the National Institute for Neurological Disorders and Stroke (NINDS), approximately, 250,000-350,000 people are suffering from the Multiple Sclerosis in the United States. The majority of the people with multiple sclerosis are diagnosed between the ages of 20 and 50, with at least two to three times more women than men being diagnosed with the disease. The most common symptoms associated with MS include fatigue, difficulty walking, vision problems, problems controlling the bladder, etc. The average life expectancy is slightly reduced for people with MS. The progress, severity, and specific symptoms of MS in any one person cannot yet be predicted.  

There are various diversify companies involved in the discovery and development of a potentially robust clinical pipeline for the treatment of Multiple Sclerosis. Merck Healthcare KGaA, Novartis, Sanofi, TG Therapeutic, Biogen, MedDay Pharmaceuticals SA, and Hoffmann-La Roche are the major market players

Actelion (Ponesimod)

Ponesimod is an investigational selective sphingosine-1-phosphate receptor 1 (S1P1) modulator that inhibits S1P protein activity and reduce the number of circulating lymphocytes that can cross the blood-brain barrier. The Janssen Pharmaceutical Companies of Johnson & Johnson (Janssen) had submitted the New Drug Application (NDA) to the U.S. Food and Drug Administration (FDA) for ponesimod for the treatment of adult patients with relapsing multiple sclerosis (MS).

Merck Healthcare KGaA (Evobrutinib)

Evobrutinib is an investigational oral inhibitor of Bruton’s tyrosine kinase (BTK) which is thought to be important in the development and functioning of various immune cells including B lymphocytes and macrophages. Currently, clinical research study is ongoing on Evobrutinib. The study would evaluate the efficacy and safety of evobrutinib administered orally twice daily versus Teriflunomide (Aubagio), administered orally once daily in participants with Relapsing Multiple Sclerosis (RMS).

Hoffmann-La Roche (Ocrelizumab)

Ocrelizumab is a humanized monoclonal antibody that selectively targets the CD20-positive B-cells implicated in the inflammatory and neurodegenerative processes of multiple sclerosis (MS), to effectively impact disease progression while maintaining immunosurveillance.

A clinical trial of Phase-III study is being conducted to treat MS. This is a single arm, open label, multicenter extension study in participants on ocrelizumab therapy at the end of Treatment period of the Roche P-trial. Participants would receive the treatment with ocrelizumab as single 600 mg infusions every 24 weeks for two years.

TG Therapeutics, Inc. (Ublituximab)

Ublituximab (TG-1101) is a monoclonal antibody that targets CD20 positive B-cells, a component of the body’s immune system. When it attaches to the B-cell it triggers immune reactions (including antibody-dependent cellular cytotoxicity, ADCC, and antibody-dependent cellular phagocytosis that result in the death of the targeted B-cell).

While ublituximab is a novel patented molecule, it’s mechanism of action is similar to the approved anti-CD20 monoclonal antibodies. Ublituximab has been bioengineered to remove certain sugar molecules from the anti-CD20 antibody, which are naturally occurring. The removal of the sugar molecules in a process called glycoengineering have enhanced the potency of ublituximab with data showing 50-100x greater activity than non-bioengineered anti-CD20 antibodies.

MedDay Pharmaceuticals SA (MD1003)

MD1003 is a highly concentrated oral formulation of biotin currently under clinical investigation as a treatment for primary and secondary progressive multiple sclerosis (PPMS and SPMS). It is being developed by MedDay. It is a promising treatment that exhibits the pro-myelinogenic effects and enhances the supply of energy for nerve impulse transmission.

Biogen (Opicinumab)

Opicinumab is a human monoclonal antibody that targets LINGO-1, a protein that suppresses the redevelopment of axons (brain cells that send functional information throughout the body) and re-formation of myelin sheaths (fibers that protect the axons). Axons and myelin sheaths are lost or damaged in patients with MS, leading to loss of physical and cognitive function. By blocking LINGO-1, opicinumab is formulated to promote regeneration of axons and myelin.

The Phase II, double-blind AFFINITY study is assessing the effectiveness of opicinumab as an add-on therapy in people with relapsing or secondary-progressive forms of MS (RMS or SPMS).

Novartis (Ofatumumab)

Ofatumumab is a fully human anti-CD20 monoclonal antibody (mAb) self-administered by a once-monthly subcutaneous injection in development for RMS. Ofatumumab works by binding to the CD20 molecule on the B-cell surface, distinct from that of other anti-CD20 antibodies, and induces potent B-cell lysis and depletion. The selective mechanism of action and subcutaneous administration of ofatumumab allows precise delivery to the lymph nodes, where B-cell depletion in MS is needed, while sparing those in the spleen that help maintain protective immunity. Once-monthly dosing of ofatumumab also allows faster repletion of B-cells, and offers more flexibility as no first dose observations or laboratory monitoring is required. Novartis obtained rights for ofatumumab from Genmab in all indications, including MS, in December 2015.

Novartis (BAF312)

Siponimod is an investigational, selective modulator of specific subtypes of the sphingosine-1-phosphate (S1P) receptor. Siponimod binds to the S1P1 sub-receptor on lymphocytes, which prevents them from entering the central nervous system (CNS) of patients with multiple sclerosis. This leads to the anti-inflammatory effects of siponimod. Siponimod also enters the CNS and binds to the S1P5 sub-receptor on specific cells in the CNS (oligodendrocytes and astrocytes). By binding to these specific receptors, siponimod has the potential to modulate damaging cell activity, and preclinical studies suggest that it may prevent synaptic neurodegeneration and promote remyelination in the central nervous system.

Sanofi (Teriflunomide)

Teriflunomide is the first original ‘once-daily’ oral ‘disease modifying therapy’ (DMT) for Multiple Sclerosis. It offers an effective, safe and a convenient option that is indicated as a first-line treatment for relapsing forms of Multiple Sclerosis that must be taken once a day, with or without food.

Emerging Pipeline Landscape of Multiple Sclerosis (MS)

Company nameProduct NameStage of developmentRoute of administrationMechanism of action
Merck Healthcare KGaAEvobrutinib + TeriflunomidePhase IIIOralBTK inhibtor
ActelionPonesimodPhase IIIOralS1P1 immunomodulator
NovartisBAF312 (Mayzent™)  Phase IIIOralS1P1 Modulator
Novartis OfatumumabPhase IIISubcutaneousanti-CD20
MedDay Pharmaceuticals MD1003Phase IIIOralEnzyme modulators
F. Hoffmann-La Roche AG Ocrelizumab/ RG1594Phase IIIIntavenousanti- CD20 positive B- cells
Sanofi TeriflunomidePhase IIIOralDihydroorotate dehydrogenase inhibitors
Sanofi AlemtuzumabPhase IIIIntravenous dihydro-orotate dehydrogenase inhibitor
TG TherapeuticsUblituximabPhase IIIOralanti- CD20
BiogenOpicinumabPhase IIIntravenousanti-LINGO