CarThera

Overview

CarThera is a French medical technology company pioneering implantable focused ultrasound devices for repeated blood-brain barrier (BBB) opening. The company’s flagship SonoCloud platform enables clinicians to temporarily disrupt the BBB in a controlled, repeatable manner, enhancing drug delivery to the central nervous system for treatment of brain tumors and neurological disorders including Alzheimer’s disease^{1CarThera - Focused Ultrasound for Brain TherapyOpen reference}.

Unlike external focused ultrasound systems that require precise positioning for each treatment session, SonoCloud is implanted cranium, allowing for multiple treatments without repositioning — a key advantage for chronic conditions like AD that may require ongoing therapeutic delivery.

Company Overview

Attribute	Details
Headquarters	Paris, France
Founded	2010
Founder	Dr. Alexandre Carpentier
Key Product	SonoCloud
Technology	Implantable focused ultrasound emitter
Stage	Phase I/II clinical trials

Technology Platform

SonoCloud Device

The SonoCloud system consists of:

1. Implantable Ultrasound Emitter: A small, cranium-mounted device that delivers focused acoustic energy

2. External Controller: A console that powers and controls the implant

3. Microbubble Co-Administration: Uses standard ultrasound contrast agents for cavitation

4. MRI Compatibility: The device is MRI-compatible for treatment planning

Mechanism of Action

The device operates through the same principle as external FUS^{2Clinical trial of blood-brain barrier disruption by pulsed ultrasound2016 · Sci Transl Med · DOI 10.1126/scitranslmed.aaf6089Open reference}:

• Focused Acoustic Energy: Precisely targeted ultrasound waves

• Cavitation Induction: Acoustic pressure causes administered microbubbles to oscillate

• Tight Junction Disruption: Mechanical forces temporarily open endothelial tight junctions

• Barrier Restoration: Tight junctions reform within 6-24 hours

Key Differentiators

Feature	External FUS (Insightec)	SonoCloud (CarThera)
Invasiveness	Non-invasive	Minimally invasive (implant)
Repeat treatments	Requires repositioning	Always in position
Treatment frequency	Limited by logistics	Can be frequent
Cost per treatment	High	Lower after implantation
Target precision	Excellent	Excellent

Clinical Applications

Brain Tumors (Primary Focus)

The most advanced clinical program is for glioblastoma:

• Enhanced chemotherapy delivery (temozolomide, doxorubicin)

• Trastuzumab for HER2-positive tumors

• Combination with immunotherapy

Alzheimer’s Disease

CarThera is expanding into AD applications:

• Enhanced anti-amyloid antibody delivery

• Targeting of hippocampal regions

• Potential for chronic, repeat treatments

• Combination with disease-modifying therapies

Other CNS Disorders

• Parkinson’s disease

• Multiple sclerosis

• Lysosomal storage disorders

Clinical Evidence

Key Trials

Trial	Indication	Phase	Status	Key Findings
NCT02557028	Glioblastoma	Phase I	Completed	Safe BBB opening; enhanced drug delivery
NCT0374406	Glioblastoma	Phase I/II	Active	Evaluating efficacy endpoints
-	AD	Planning	Preclinical	-

Published Data

1. Carpentier et al. (2016): First-in-human study demonstrating safety of pulsed ultrasound BBB opening in recurrent glioblastoma patients^{2Clinical trial of blood-brain barrier disruption by pulsed ultrasound2016 · Sci Transl Med · DOI 10.1126/scitranslmed.aaf6089Open reference}

Competitive Landscape

Company	Device	Approach	Status
CarThera	SonoCloud	Implantable	Phase I/II
Insightec	ExAblate Neuro	External	Phase I/II for BBB
NaviFUS	Research system	External	Preclinical
BrainSonix	FUS device	External	Discovery

Development Pipeline

Current Programs

1. SonoCloud-9: Most recent iteration, optimized for BBB opening

2. Combination therapies: Partnerships with pharmaceutical companies

3. Chronic treatment protocols: For AD and chronic conditions

Future Directions

• Smaller implants: Reducing surgical footprint

• Wireless power: Eliminating transcutaneous connections

• Multi-focus arrays: Treating larger brain volumes

• Closed-loop control: AI-driven treatment optimization

Cross-References

• AD Focused Ultrasound BBB Opening Companies

• Focused Ultrasound BBB Opening

• Blood-Brain Barrier

• Insightec

• AD Neurovascular Therapy Companies