Working… Menu

Potential of Transplanted Stem Cells to Mature Into Salivary Gland and Cheek Cells

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. Read our disclaimer for details. Identifier: NCT00023491
Recruitment Status : Completed
First Posted : September 7, 2001
Last Update Posted : March 4, 2008
Information provided by:
National Institutes of Health Clinical Center (CC)

Tracking Information
First Submitted Date September 7, 2001
First Posted Date September 7, 2001
Last Update Posted Date March 4, 2008
Study Start Date September 2001
Primary Completion Date Not Provided
Current Primary Outcome Measures Not Provided
Original Primary Outcome Measures Not Provided
Change History Complete list of historical versions of study NCT00023491 on Archive Site
Current Secondary Outcome Measures Not Provided
Original Secondary Outcome Measures Not Provided
Current Other Pre-specified Outcome Measures Not Provided
Original Other Pre-specified Outcome Measures Not Provided
Descriptive Information
Brief Title Potential of Transplanted Stem Cells to Mature Into Salivary Gland and Cheek Cells
Official Title Assessment of the Potential of Hematopoietic Stem Cells to Transdifferentiate Into Salivary Gland and Oral Mucosal Epithelial Cells in Adult Bone Marrow Transplant Patients
Brief Summary

This study will examine whether transplanted stem cells can turn into salivary gland cells in stem cell recipients. If so, stem cells might be used to restore salivary gland function in patients with Sjogren's syndrome and other causes of dry mouth. People with severe dry mouth may develop difficulty swallowing, severe tooth decay, infections of the mouth and pharynx, and mouth sores.

Female patients 18 years of age and older who are enrolled in the National Heart, Lung and Blood Institute's protocol 97-H-009 or 97-H-0202 and who have received a stem cell transplant from a male donor may be eligible for this study. Five patients with graft-versus host disease (GVHD) and five without GVHD will be included. GVHD is a transplantation reaction in which the donor's cells mount an immune response against the recipient's tissues. Patients with chronic GVHD have mouth ulcerations and dry mouth similar to that of patients with Sjogren's syndrome. Five healthy female volunteers will also be enrolled.

Participants will have a medical and dental history. Then, cells will be collected from the inside of the cheek (buccal cell scraping) and from the salivary glands (labial gland biopsy) as described below:

Buccal cell scraping - Cells are collected from the inside of the cheek by wiping for 5 seconds with a plastic brush.

Labial glands biopsy - The lower lip will be numbed and a small incision will be made on the inside of the lower lip. Six small salivary glands in the lower lip will be removed and the incision will be closed with four stitches.

Cells collected from these procedures will be examined to see if donated stem cells turned into salivary gland or cheek cells.

Patients will return to the clinic 5 to 10 days after the biopsy to have the stitches removed and assess healing.

Detailed Description Patients with Sjogren's syndrome (1-2 million in the U.S.), and patients exposed to ionizing radiation during therapy for head and neck cancer (~40,000 new patients/year in the U.S.), experience severe salivary gland hypofunction. In both patient groups, via different pathogenic mechanisms, acinar cells in the glands are lost. These cells are the sole site of fluid production in salivary glands, and such patients cannot produce adequate levels of saliva, leading to considerable morbidity (xerostomia, dysphagia, dental caries, oro-pharyngeal infections, and mucositis). In many patients, all parenchymal tissue may be lost. For this latter group, there is no available therapy as they are not candidates for either pharmacological or gene therapy if little to no epithelial tissue remains. Recent reports suggest that organ-specific stem cells can differentiate into cells of other organs. These findings carry significant implications for possible clinical use. This protocol will investigate if adult human hematopoietic stem cells (HSC) can transdifferentiate into salivary gland and oral mucosal epithelial cells. We will recruit female bone marrow transplant recipients (from existing NHLBI protocols) who have received HSC from a male donor. This gender-mismatched strategy will allow us to detect cells of donor origin by using an RNA probe specific to the human Y chromosome. A biopsy of labial minor salivary glands and a cheek scraping will be obtained from female transplant patients. The biopsy causes minimal discomfort and the cheek scraping is a non-invasive technique. Both procedures are used routinely for clinical diagnosis. The samples will be co-stained for specific genetic and protein markers for salivary gland or oral mucosal epithelial cells, respectively. Cells positive for these markers (Y chromosome, cytokeratins, mucin 1, and NKCC1) would indicate that the donor's HSC became functionally competent salivary gland epithelial cells. This protocol will also examine bone marrow transplant recipients with chronic Graft-versus-Host Disease (GVHD). These patients show similar complications (xerostomia and oral mucositis) as those encountered in patients with Sjogren's Syndrome. We hypothesize that GVHD may provide a positive recruitment signal for HSC to home to salivary and oral mucosal sites. This protocol will recruit 5 female bone marrow transplant recipients without GVHD and 5 with GVHD. The primary potential benefit of this study is that if HSC can turn into salivary gland cells, they could be used to regenerate lost salivary gland tissues or to seed an artificial salivary gland for patients with irreversible salivary gland damage.
Study Type Observational
Study Design Not Provided
Target Follow-Up Duration Not Provided
Biospecimen Not Provided
Sampling Method Not Provided
Study Population Not Provided
  • Graft vs Host Disease
  • Sjogren's Syndrome
Intervention Not Provided
Study Groups/Cohorts Not Provided
Publications *

*   Includes publications given by the data provider as well as publications identified by Identifier (NCT Number) in Medline.
Recruitment Information
Recruitment Status Completed
 (submitted: June 23, 2005)
Original Enrollment Same as current
Study Completion Date October 2004
Primary Completion Date Not Provided
Eligibility Criteria


We will review medical records of patients enrolled in NHLBI protocol who are 18 years of age or older.


This study excludes any subjects younger than 18 years old.

Female subjects recruited for this study would ideally have no prior history of male childbearing or abortion.

Sexes Eligible for Study: Female
Ages Child, Adult, Older Adult
Accepts Healthy Volunteers No
Contacts Contact information is only displayed when the study is recruiting subjects
Listed Location Countries United States
Removed Location Countries  
Administrative Information
NCT Number NCT00023491
Other Study ID Numbers 010234
Has Data Monitoring Committee Not Provided
U.S. FDA-regulated Product Not Provided
IPD Sharing Statement Not Provided
Responsible Party Not Provided
Study Sponsor National Institute of Dental and Craniofacial Research (NIDCR)
Collaborators Not Provided
Investigators Not Provided
PRS Account National Institutes of Health Clinical Center (CC)
Verification Date October 2004