- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT02202642
The Improvement of Limbal Epithelial Culture Technique by Using Collagenase to Isolate Limbal Stem Cells
July 24, 2014 updated by: National Taiwan University Hospital
The Improvement of Limbal Epithelial Culture Technique for the Treatment of Unilateral Limbal Insufficiency by Using Collagenase to Isolate Limbal Stem Cells
Using collagenase to isolate limbal stem cells and improve the technique of ex vivo expansion of limbal stem cells for the treatment of patients suffering from unilateral limbal stem cell insufficiency based on the concept of "limbal stem cells need special cell-cell contact and cell-extracellular matrix interaction to support their survival".
Study Overview
Status
Unknown
Conditions
Intervention / Treatment
Detailed Description
Patients suffering from unilateral limbal stem cell insufficiency and understand the benefits and risk factors of the operation will be enrolled in this clinical trial.
Two weeks before transplantation, the investigators first take 1-2 mm2 of limbal tissues from the healthy eye, digest the tissue with collagenase, and get an epithelial cell cluster.
The cell cluster will be cultured on amniotic membrane with SHEM medium which contains Dulbecco's modified Eagle's medium/F12 (1:1), 5% dimethyl sulfoxide, 10 ng/ml human epidermal growth factor, 5μg/ml insulin, 0.5 μg/ml hydrocortisone, 1 nM cholera toxin, 50μg/ml gentamicin, 1.25μg/ml amphotericin B. Seven to ten days later after successful culture, transplantation will be performed after the cells reaches 1.5-2 cm2 compact confluent epithelial sheets without evidence of contamination.
During the operation, lamellar keratectomy will be performed to remove the abnormal corneal neovascularization and scar tissue.
The cultivated epithelial sheets will be transplanted to denuded corneal surface with fibrin glue and suture technique.
The patients are planed to be admitted for 2 weeks.
After discharge, follow up of the patients will be performed on one week, two week, one month, two months, three months, six months and one year later.
Pictures of external eyes will be taken and the extent of corneal epithelium regeneration, visual acuity, and complications will be recorded during follow-up visits.
The investigators plan to collect 10 patients.
Study Type
Interventional
Enrollment (Anticipated)
10
Phase
- Phase 1
Contacts and Locations
This section provides the contact details for those conducting the study, and information on where this study is being conducted.
Study Contact
- Name: Wei Li Chen, MD, PhD
- Phone Number: 5206 886-2-23123456
- Email: chenweili@ntu.edu.tw
Study Locations
-
-
-
Taipei, Taiwan, 100
- Recruiting
- Wei-Li Chen
-
-
Participation Criteria
Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.
Eligibility Criteria
Ages Eligible for Study
18 years to 70 years (ADULT, OLDER_ADULT)
Accepts Healthy Volunteers
No
Genders Eligible for Study
All
Description
Inclusion Criteria:
- Age: between 18-70 years old.
- Lesion eye should have limbal insufficiency more than 180 degrees.
- Lesion eye should have recurrent corneal erosions, corneal neovascularisation and poor vision caused by limbal insufficiency.
- The symptoms should be more than 1/2 year, and have no possibility of improvement by medical treatment.
- The patients will to received the operation and the long term post- operative follow-up.
- The patients are not infected by AIDS, hepatitis B/C , and willing to received the associated examinations.
- The patients does not plan to be pregnant from the day of cell culture and transplantation for 1 year. They also agree to receive the pregnant test.
- The condition of cell culture from the 1st to the clinical trial is successful.
Exclusion Criteria:
- Bilateral limbal insufficiency.
- No recurrent corneal erosion, corneal neovascularisation or poor vision was found due to limbal insufficiency. If corneal neovascularisation was found deeper than the anterior 1/2 of corneal stroma, or corneal thickness was less than 200 um evaluated by anterior segment OCT and ultrasound pachymetry, the patients should be excluded from the operation criteria. If corneal thickness becomes thicker, the patients can be enrolled for operation.
- About corneal sedation, if the value checked by Cocet-Bonnet esthesiometer is less than 5 mm, the patients should be excluded from operation.
- The condition can be improved by medication, or resolve spontaneously.
- Post-operative follow up is less than 1/2 year
- The patient can't receive long term postoperative follow up
- No light perception, or can be expected to have very poor prognosis
- If the intraocular pressure was more than 21 mmHg under necessary glaucoma surgery and anti-glaucoma medication, or optic disc cupping was more than 90%, or visual field was found to have severe defects, the patients were excluded from the clinical trial.
- Severe lagophthalmos or trichiasis, and does not received blepharoplasty.
- Severe dry eye syndrome. Those patients with schirmer's test result less than 1 mm should be excluded.
- If the cells in the first part of the clinical trial can't be successfully cultivated, the patients should be excluded. If the patients insisted to received further treatment, they can be enrolled 3 months later.
- Pregnancy
Study Plan
This section provides details of the study plan, including how the study is designed and what the study is measuring.
How is the study designed?
Design Details
- Primary Purpose: TREATMENT
- Allocation: NA
- Interventional Model: SINGLE_GROUP
- Masking: NONE
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
EXPERIMENTAL: limbal stem cells
Using collagenase to isolate limbal stem cells and improve the technique of ex vivo expansion of limbal stem cells for the treatment of patients suffering from unilateral limbal stem cell insufficiency based on the concept of "limbal stem cells need special cell-cell contact and cell-extracellular matrix interaction to support their survival"
|
Cultured limbal stem cells transplantation
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Using collagenase to isolate limbal stem cells and improve the technique of ex vivo expansion of limbal stem cells for the treatment.
Time Frame: 12 months
|
Nine to twelve days later after successful culture, transplantation will be performed after the cells diameter reaches 1.5-2.0
cm compact confluent epithelial sheets without evidence of contamination.
|
12 months
|
Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Study record dates
These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.
Study Major Dates
Study Start
January 1, 2012
Primary Completion (ANTICIPATED)
December 1, 2015
Study Completion (ANTICIPATED)
December 1, 2015
Study Registration Dates
First Submitted
April 21, 2011
First Submitted That Met QC Criteria
July 24, 2014
First Posted (ESTIMATE)
July 29, 2014
Study Record Updates
Last Update Posted (ESTIMATE)
July 29, 2014
Last Update Submitted That Met QC Criteria
July 24, 2014
Last Verified
July 1, 2014
More Information
Terms related to this study
Additional Relevant MeSH Terms
- Nervous System Diseases
- Skin Diseases
- Immune System Diseases
- Autoimmune Diseases
- Eye Diseases
- Wounds and Injuries
- Craniocerebral Trauma
- Trauma, Nervous System
- Skin Diseases, Vesiculobullous
- Conjunctival Diseases
- Facial Injuries
- Burns
- Eye Injuries
- Pemphigoid, Bullous
- Corneal Diseases
- Pemphigoid, Benign Mucous Membrane
- Eye Burns
- Burns, Chemical
Other Study ID Numbers
- 201007032D
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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