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Safety of a Single Administration of AAV2hAQP1, an Adeno-Associated Viral Vector Encoding Human Aquaporin-1 to One Parotid Salivary Gland in People With Irradiation-Induced Parotid Salivary Hypofunction

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Know the risks and potential benefits of clinical studies and talk to your health care provider before participating. Read our disclaimer for details. Identifier: NCT02446249
Recruitment Status : Recruiting
First Posted : May 18, 2015
Last Update Posted : May 4, 2022
National Institute of Dental and Craniofacial Research (NIDCR)
Information provided by (Responsible Party):
MeiraGTx UK II Ltd

Brief Summary:


- Radiation can cause the parotid salivary glands to make less saliva (dry mouth). This can cause problems like infections and tooth decay. Researchers hope a new drug can help people with dry mouth caused by radiation.


- To examine the safety of AAV2hAQP1 gene therapy. To see if the drug increases saliva in people whose parotid glands have had radiation.


- People at least 18 years of age with a history of radiation therapy for head and neck cancer.


Participants will be screened in 2 visits with:

  • medical history
  • physical exam
  • scans
  • saliva collections
  • sialogram. A substance is injected in the parotid gland and X-rays are taken.
  • non-drug infusion
  • IV dose of glycopyrrolate to stop saliva

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3-day hospital stay: Participants will get the gene infusion. The AAV2hAQP1 will be in a solution in a syringe. It will be slowly pushed through an opening into the gland inside your mouth.

10 outpatient visits over 3 years. These may include:

  • repeats of screening tests
  • blood and urine tests
  • oral and head and neck exams, including a thin scope in the airway
  • questionnaires
  • small piece of skin taken
  • small piece of parotid tissue taken by either: a small video-scope in the parotid duct that also takes pictures or by a small needle guided by ultrasound
  • scans. Participants lie in a machine or a scanner The machine may feel close to the body or face. . For some, a substance will be injected in a vein or put in the mouth.
  • Participants will keep a diary about how they feel before and after the therapy.
  • oral microbiome gingival and buccal swab

Condition or disease Intervention/treatment Phase
Squamous Cell Head and Neck Cancer Radiation Induced Xerostomia Salivary Hypofunction Biological: AAV2hAQP1 Phase 1

Detailed Description:
The treatment of most head and neck cancer patients includes ionizing radiation (IR). Salivary glands in the IR field suffer irreversible damage. There is no conventional treatment available to correct this condition. Our research group has been developing an adeno-associated virus vector based on the hypothesis that this vector is capable of safely transferring the human aquaporin-1 (hAQP1) cDNA gene to parotid glands of adult patients with IR-induced salivary hypofunction, resulting in an elevated salivary output. Human AQP1, the archetypal water channel, is a plasma membrane protein that facilitates water movement across lipid bilayers. Minipig studies have shown that the AAV2hAQP1 strategy for restoring salivary flow to IR-damaged salivary glands is effective without untoward effects after salivary gland delivery. As a proof of concept that AQP1 would restore saliva flow in a human population, we recently completed a phase 1 clinical trial (06-D-0206) using an Adenovirus-based vector encoding AQP1 to a single previously irradiated parotid gland in eleven patients using an open label, single dose, dose-escalation design. All patients tolerated vector delivery and study procedures well and positive objective and subjective responses were seen in five patients, all at doses <5.8 times10(9) vp/gland. At higher doses the patients possibly initiated an immune response to the vector and no improvement in gland function was observed. These findings have encouraged us to pursue studies with AAV2 based vectors, which have demonstrated lower immunogenicity and more stable expression compared with adenoviral vectors. The purpose of this clinical protocol is to test the safety of AAV2hAQP1, with some measures of efficacy, in adult patients with established IR-induced parotid gland hypofunction. The targeted tissue site for the AAV2hAQP1 vector in the proposed study is a single parotid gland. In this Phase 1 dose-escalation study, safety will be evaluated using conventional clinical and immunological parameters. The primary outcome measure for biological efficacy will be parotid gland salivary output.

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Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 36 participants
Allocation: N/A
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: Open-Label, Dose-Escalation Study Evaluating the Safety of a Single Administration of an Adeno-Associated Virus Vector Encoding Human Aquaporin-1 to One Parotid Salivary Gland in Individuals With Irradiation-Induced Parotid Salivary Hypofunction
Study Start Date : May 4, 2015
Estimated Primary Completion Date : July 2025
Estimated Study Completion Date : July 2025

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Dry Mouth

Arm Intervention/treatment
Experimental: single arm dose escalation
single arm dose escalation
Biological: AAV2hAQP1
Infusion of gene therapy

Primary Outcome Measures :
  1. Safety of vector [ Time Frame: 36 months ]

Secondary Outcome Measures :
  1. Efficacy of treatment [ Time Frame: 36 months ]

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

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Ages Eligible for Study:   18 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

    1. At least 18 years of age
    2. History of external beam radiation therapy for head and neck cancer, with a mean dose equal to or greater than 15 Gy to a parotid gland.
    3. Abnormal parotid gland function as judged by both absence of unstimulated parotid salivary flow and a stimulated parotid salivary flow in the targeted parotid gland >0 and <0.3 mL/min/gland after 2% citrate stimulation.
    4. No evidence of recurrence of primary malignancy by otolaryngology (ENT) assessment. Additionally, all patients must have been disease-free of head and neck cancer for at least 5 years, a status to be determined at pre-dose screening using negative clinical exams and PET and or CT imaging of the neck and chest. The anatomic subset of HPV positive oropharyngeal cancer may be enrolled after 2 years post completion of therapy.
    5. Willingness to practice the required birth control method ("barrier" contraception, condoms, diaphragm) until AAV2hAQP1 is no longer detectable in their serum or saliva.
    6. Women who cannot bear children (post-menopausal or due to a surgical intervention) also will be required to practice barrier birth control methods until AAV2hAQP1 is no longer detectable in their serum or saliva.
    7. Ability to stay at the NIH hospital for the period of time necessary to complete each on-site phase of the protocol (3-5 days).
    8. No history of allergies to any medications or agents to be used in this protocol.
    9. On stable medications (greater than or equal to 2 months) for any underlying medical conditions at time of vector administration.


  1. Pregnant or lactating women. Women of childbearing potential are required to have a negative serum pregnancy test at screening and a negative urine pregnancy test within 48 hours prior to gene infusion.
  2. Any experimental therapy within 3 months.
  3. Any active respiratory tract infection in the 3 weeks prior to day 1 of the protocol
  4. Active infection that requires the use of intravenous antibiotics and does not resolve at least 1 week before Day 1.
  5. Uncontrolled ischemic heart disease: unstable angina, evidence of active ischemic heart disease on ECG, congestive heart failure (left ventricular ejection fraction < 45% on MUGA or echo) or cardiomyopathy.
  6. Asthma or chronic obstructive pulmonary disease requiring regular inhaled or systemic corticosteroids.
  7. Individuals with a history of autoimmune diseases affecting salivary glands, including Sjogren's syndrome, lupus, scleroderma, type I diabetes, sarcoidosis, amyloidosis, and chronic graft versus host disease. Organ specific autoimmune conditions may be included if clinically stable.
  8. Use of systemic immunosuppressive medications (,i.e., corticosteroids). Topical corticosteroids are allowed.
  9. Malignancy, other than head and neck, within past 3 years, with the exception of adequately treated basal cell or squamous cell carcinoma of the skin or in situ cervical carcinoma.
  10. Active infections including Epstein-Barr virus (EBV), cytomegalovirus (CMV), hepatitis B, hepatitis C, or human immunodeficiency virus (HIV) infection.
  11. WBC <3000/microL or ANC <1500/microL or Hgb <10.0 g/dL or platelets <100,000/microL or absolute lymphocyte count less than or equal to 500/microL.
  12. ALT and/or AST > 1.5 times upper limit of normal (ULN) or alkaline phosphatase >1.5 times ULN
  13. Serum creatinine > 2 mg/dL.
  14. Serum bilirubin measurements (total, direct, indirect) that are outside of the normal range.
  15. Individuals who are active cigarette smokers as determined by self-reporting.
  16. Individuals who have an allergy to iodine or shellfish and thus are unable to have sialographic evaluations.
  17. Individuals who have an allergy or hypersensitivity to glycopyrrolate
  18. Individuals whose parotid duct(s) are not clinically accessible on screening sialography.
  19. Individuals, who on sialography, have a distal stenosis that would impede vector delivery.
  20. Significant concurrent or recently diagnosed (<2 months) medical condition that, in the opinion of the Medically Responsible Investigator, could affect the patient's ability to tolerate or complete the study.
  21. Live vaccines within 4 weeks of first infusion.
  22. Individuals who have had an adverse response to prednisone (i.e. hallucinations).
  23. Individuals with uncontrolled diabetes (HbA1c greater than 10%).
  24. Individuals with untreated severe dental caries, pyorrhea, gingivitis, chronic radiation mucositis or ulceration, erythroplasia, leukoplakia or other pre-malignant conditions.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT02446249

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Contact: Katherine Hall, R.N., MSN 301-402-6905
Contact: John A Chiorini, Ph.D. (301) 496-4279

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United States, Maryland
National Institutes of Health Clinical Center, 9000 Rockville Pike Recruiting
Bethesda, Maryland, United States, 20892
Contact: For more information at the NIH Clinical Center contact Patient Recruitment and Public Liaison Office (PRPL)    800-411-1222 ext TTY8664111010   
Sponsors and Collaborators
MeiraGTx UK II Ltd
National Institute of Dental and Craniofacial Research (NIDCR)
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Principal Investigator: John A Chiorini, Ph.D. National Institute of Dental and Craniofacial Research (NIDCR)
Additional Information:
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Responsible Party: MeiraGTx UK II Ltd Identifier: NCT02446249    
Other Study ID Numbers: 150129
15-D-0129 ( Other Identifier: NIDCR )
First Posted: May 18, 2015    Key Record Dates
Last Update Posted: May 4, 2022
Last Verified: May 2022
Keywords provided by MeiraGTx UK II Ltd:
Gene Therapy
Additional relevant MeSH terms:
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Salivary Gland Diseases
Mouth Diseases
Stomatognathic Diseases