Parkinson’s Treatment: Light Therapy and Beyond-Part 1

Jun 5, 2025

Innovations in Parkinson’s Treatment: Exploring Light Therapy and Beyond

Living with Parkinson’s disease presents daily challenges, not just for those diagnosed but also for their families and caregivers. 

It’s a journey that requires resilience, adaptation, and a strong support system. While a cure remains the ultimate goal, the landscape of Parkinson’s treatment is far from static. 

Dedicated researchers around the world are tirelessly working on innovative therapies. These efforts offer new hope for managing symptoms and potentially slowing disease progression.

This isn’t just about refining old methods; it signifies a shift towards exploring entirely new avenues. These avenues range from harnessing the power of light to pioneering biological interventions and leveraging cutting-edge technology.

This blog post will take you through some of the most exciting advancements on the horizon. It offers a glimpse into a future where managing Parkinson’s could look very different.

Remember, the field is dynamic, and while some of these innovations are still investigational, they represent the leading edge of scientific discovery aimed at improving lives.

A New Spectrum of Hope: Regulating the Body’s Clock

While motor symptoms are the most visible signs of Parkinson’s, the non-motor symptoms—such as poor sleep, depression, and debilitating fatigue—can be just as, if not more, impactful on daily life. 

A groundbreaking area of research is now targeting the root cause of many of these issues: a disrupted internal body clock, or circadian rhythm.

This innovative approach moves away from pharmacological solutions. It asks a different question: what if we could use light itself to help restore the body’s natural balance?

This therapy, pioneered by PhotoPharmics, explores a powerful idea: light influences brain activity.  Specifically, it focuses on the profound connection between light, the brain, and our daily rhythms. 

Introducing The Celeste® device

In a healthy individual, the body’s master clock is located in a brain region called the suprachiasmatic nucleus (SCN). It is synchronized by light signals received through the eyes. This light-regulated process influences our sleep-wake cycle, mood, and energy levels. Unfortunately, dopamine loss in Parkinson’s disrupts this system and triggers many non-motor symptoms.

The therapeutic solution is a specialized, non-invasive phototherapy device, such as the Celeste® device. It works by delivering specific, spectrally-opposed wavelengths of light to the user at programmed times of the day. 

This light is not ordinary; it’s highly calibrated. It targets specific retinal cells that signal the brain’s master clock. The goal is to gently and effectively regulate and reset the user’s circadian rhythm without drugs.

By restoring a more normal day/night cycle, this therapy aims to produce a domino effect of positive benefits. A well-regulated circadian rhythm can lead to improved sleep consolidation and quality. 

In turn, better sleep is foundational to improving mood, reducing the burden of depression, increasing daytime energy, and sharpening cognitive function. This approach tackles the underlying dysfunction rather than just masking the individual symptoms.

This therapy is the subject of the “Celeste Light for PD Trial,” a large Phase 3 study evaluating its effectiveness in Parkinson’s. Unlike many investigational treatments, this therapy is designed to be used at home, integrating seamlessly into a person’s daily routine. 

Generally, this form of phototherapy is considered very safe. It represents a beacon of hope for managing the challenging non-motor symptoms of Parkinson’s, offering a non-pharmacological approach that could complement existing treatments. 

However, more large-scale, rigorously controlled clinical trials like the Light for PD study are essential to confirm its efficacy before it can become a mainstream option.

Non-Pharmacological Parkinson’s Treatment Strategies

While light therapy charts a novel path, other non-drug treatments are also evolving, offering new ways to manage Parkinson’s symptoms.

Focused Ultrasound: A Novel Parkinson’s Treatment Approach

Imagine a surgical outcome without the scalpel. That’s the promise of MR-guided Focused Ultrasound. This FDA-approved technology uses intersecting ultrasound beams, guided by real-time MRI. It precisely heats and destroys a small target area in the brain, causing motor symptoms.

For Parkinson’s, FUS can target the Ventral Intermediate Nucleus (VIM) of the thalamus, primarily to alleviate medication-refractory tremor, or the Globus Pallidus Interna (GPi) to address other motor issues like stiffness, slowness, and dyskinesia. The major advantage is that it’s incisionless, offering immediate symptom relief for many. 

However, the lesion created by Focused Ultrasound is permanent. For this reason, the procedure is typically done on only one side of the brain to minimize risks like speech or swallowing issues.

Research is ongoing to refine this technology and explore its potential for temporarily opening the blood-brain barrier to facilitate drug delivery.

Transcranial Magnetic Stimulation (TMS)

TMS is another non-invasive technique that uses magnetic pulses to gently modulate the activity of specific brain regions. Depending on the frequency and pattern of the pulses, TMS can either excite or inhibit neuronal activity. For Parkinson’s, it’s being investigated for various motor symptoms, particularly for improving gait and reducing Freezing of Gait (FOG).

Non-motor symptoms like depression (for which it has FDA approval) and cognitive issues are also being targeted. Some deep TMS systems have gained regulatory approval outside the US for Parkinson’s motor symptoms. 

While generally safe, the benefits of TMS can sometimes be temporary, and researchers are working to optimize treatment protocols for longer-lasting effects.

Novel Rehabilitation Strategies

Rehabilitation remains a cornerstone of Parkinson’s care, and it too is undergoing an innovation wave. There’s a growing emphasis on holistic, personalized programs that integrate traditional therapies with new technologies.

  • Virtual and Augmented Reality (VR/AR) systems are changing how people with Parkinson’s approach exercise. They create engaging, game-like environments to make movement fun. These tools help improve motor control, balance, and even cognitive engagement during physical activity.

  • Robotics are being used to provide intensive, repetitive training for gait and upper limb function, offering consistent and quantifiable therapy.
  • Specialized exercise programs like LSVT BIG® (for movement amplitude) and LSVT LOUD® (for voice power) continue to show strong evidence for improving motor and speech functions.
  • Dual-task training, which involves performing a cognitive task while executing a motor task, is gaining traction to address the difficulties many people with Parkinson’s experience with divided attention.
  • Mind-body interventions like Tai Chi, yoga, and mindfulness meditation are also being recognized for their benefits in improving balance, flexibility, mood, and overall quality of life.

These innovative non-pharmacological approaches offer valuable alternatives and adjuncts to medication, empowering individuals to take an active role in managing their condition.

Advancements in Drug-Based Parkinson’s Treatment

The search for better medications and biological therapies is at the heart of Parkinson’s research, with a significant shift towards treatments that could potentially slow or even halt disease progression, rather than just managing symptoms.

Targeting the Core Pathology: New Drug Candidates

  • Alpha-Synuclein:

  • This protein, which misfolds and clumps together to form Lewy bodies, is a hallmark of Parkinson’s. Many new drugs aim to tackle it directly.
    • Immunotherapies: This approach involves several strategies. Vaccines aim to train the immune system. They help it recognize abnormal alpha-synuclein. The goal is to clear this protein. An example is UB-312. It showed target engagement in early trials. Monoclonal antibodies are another method. These are directly administered. They bind to the problematic protein. This helps remove alpha-synuclein. Prasinezumab is one example. It has shown some positive signals in Phase 2 trials.

  • Neuroinflammation and Mitochondrial Health:

  • Chronic inflammation in the brain and dysfunction in the mitochondria (the cell’s energy factories) are recognized as key contributors to Parkinson’s progression.
    • Drugs targeting the NLRP3 inflammasome (an inflammatory complex), such as Dapansutrile (currently in Phase 2), aim to quell this damaging inflammation.
    • c-ABL inhibitors, like Risvodetinib and Vodobatinib (both in Phase 2 trials and showing good brain penetration), are being investigated for their potential to protect neurons by reducing oxidative stress and improving the clearance of alpha-synuclein.

  • Genetic Clues Paving New Paths:

  • For individuals with specific genetic links to Parkinson’s, more personalized treatments are emerging.
    • GBA1 Gene Mutations: These are a significant risk factor. Therapies aim to boost the activity of the GCase enzyme, which is deficient in these individuals. Ambroxol (a repurposed cough medicine) is in a large Phase 3 trial (ASPro-PD), and BIA 28-6156 is a GCase activator currently in Phase 2.
    • LRRK2 Gene Mutations: Several companies are developing LRRK2 kinase inhibitors, with some candidates now in clinical trials.

  • Repurposed and Novel Mechanisms:

Looking Ahead: Part 2 and a Vital Clinical Trial Opportunity

In Part 2 of “Innovations in Parkinson’s Treatment,” we will delve into the exciting realms of gene and stem cell therapies – biological game-changers that aim to restore lost function or protect remaining neurons. 

We’ll also explore how cutting-edge technology, including advanced Deep Brain Stimulation (DBS), wearable devices, and the transformative power of Artificial Intelligence (AI), is reshaping how Parkinson’s is understood, managed, and treated.

Want to be part of pioneering research for Parkinson’s non-motor symptoms? 

The “Light for PD” clinical trial, testing the Celeste phototherapy device, is making significant strides with over 200 patients already enrolled! This crucial study is nearing its final stages. If you or a loved one with PD is interested in exploring this non-invasive approach to manage non-motor symptoms like poor sleep, depression, and fatigue, now is the critical time to act.

Don’t miss your chance to contribute. 

Learn more and inquire about joining the Light for PD trial before enrollment closes: https://www.lightforpd.com/