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AAV2-hAQP1

Phase 2

Grade 2 and 3 Late Xerostomia Caused by Radiotherapy for Cancers of the Upper Aerodigestive Tract, Excluding the Parotid Glands | Gene therapy | ENT |MeiraGTx Holdings plc|Last Updated: Oct 16, 2025

Success Probability

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Market & Valuation

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Trial Design

RandomizedNO_TREATMENT_CONTROLLEDDMC
Total Trials1
Total Enrollment276

FDA Designations

RMATORPHAN_DRUGBREAKTHROUGH_THERAPY

Clinical trial landscape

AAV2-hAQP1 · 1 trial · 1 indication

Phase 2 1
NCT06544798Long-term Follow-up of Gene Therapy for Radiation-Induced XerostomiaGrade 2 and 3 Late Xerostomia Caused by Radiotherapy for Cancers of the Upper Aerodigestive Tract, Excluding the Parotid Glands
ENROLLING BY_INVITATION276 Analytics
PHASE2ENROLLING BY_INVITATION
Long-term Follow-up of Gene Therapy for Radiation-Induced Xerostomia
Grade 2 and 3 Late Xerostomia Caused by Radiotherapy for Cancers of the Upper Aerodigestive Tract, Excluding the Parotid GlandsUnlock trial analytics

Study Endpoints

Primary Endpoints

Number of participants with study drug-related adverse events and serious adverse events
From study start until Month 60 post-treatment
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Study Design & Arms

AllocationRANDOMIZED
MaskingNONE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Follow-up groupNO_INTERVENTIONParticipants who were randomized to AAV2-hAQP1 treatment in Study MGT-AQP1-201 will continue in this long-term follow-up schedule to complete an additional 48 months of follow-up after their end-of-study visit in Study MGT-AQP1-201. All study participants are to be followed for a period of 60 months after vector administration.
Active treatment groupEXPERIMENTALParticipants who were randomized to placebo treatment in Study MGT-AQP1-201, will be offered to transition from the long-term follow-up schedule to an active treatment schedule at the time of unblinding. Study drug administration should be completed after unblinding and after confirmation of the participant's continued eligibility for treatment. Upon completion of the 12-month primary treatment period, participants will continue in the study according to a follow-up schedule, to complete a total of 60 months of follow-up after AAV2-hAQP1 administration.

Interventions

NameTypeDescription
AAV2-hAQP1GENETICAdministration of a prespecified concentration of AAV2-hAQP1 via Stensen's duct to each parotid gland
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites8

Inclusion Criteria: * Received study drug in Study MGT-AQP1-201 Exclusion Criteria: * Withdrew consent to participate in Study MGT-AQP1-201.

Countries:United StatesCanada
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Frequently asked questions about AAV2-hAQP1

What is AAV2-hAQP1 used for?

AAV2-hAQP1 is an investigational gene therapy being developed for squamous cell head and neck cancer and for grade 2 and 3 late xerostomia caused by radiotherapy for cancers of the upper aerodigestive tract, excluding the parotid glands. It is designed to address irradiation-induced parotid salivary hypofunction.

What does AAV2-hAQP1 target?

AAV2-hAQP1 is an adeno-associated viral vector encoding human aquaporin-1. It is designed to deliver the gene for aquaporin-1 to salivary gland tissue to restore salivary function in patients with radiation-induced xerostomia.

Who makes AAV2-hAQP1?

AAV2-hAQP1 is being developed by MeiraGTx Holdings plc, a biopharmaceutical company traded on the stock exchange under the ticker symbol MGTX.

What phase is AAV2-hAQP1 in?

AAV2-hAQP1 is in Phase 2 clinical development. It has received FDA designations including Regenerative Medicine Advanced Therapy (RMAT), Orphan Drug, and Breakthrough Therapy. It is investigational and not yet approved for commercial use.

What clinical trials is AAV2-hAQP1 in?

AAV2-hAQP1 has been studied in two clinical trials. NCT02446249 was a Phase 1 safety study in 17 participants with irradiation-induced parotid salivary hypofunction, completed in the United States. NCT06544798 is a Phase 2 long-term follow-up study enrolling 276 participants with grade 2 and 3 late xerostomia in the United States and Canada.

Is AAV2-hAQP1 the same as AAV2hAQP1?

Yes, AAV2-hAQP1 is also referred to as AAV2hAQP1 in clinical trial documentation. Both names refer to the same adeno-associated viral vector encoding human aquaporin-1.