We're building a better ClinicalTrials.gov. Check it out and tell us what you think!
ClinicalTrials.gov Menu

Safety and Efficacy of CRISPR/Cas9 mRNA Instantaneous Gene Editing Therapy to Treat Refractory Viral Keratitis

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.
ClinicalTrials.gov Identifier: NCT04560790
Recruitment Status : Completed
First Posted : September 23, 2020
Last Update Posted : August 24, 2022
Eye & ENT Hospital of Fudan University
Information provided by (Responsible Party):
Shanghai BDgene Co., Ltd.

Brief Summary:
The purpose of this study is to evaluate the safety, tolerability and efficacy of a single escalating doses of BD111 CRISPR/Cas9 mRNA Instantaneous Gene Editing Therapy administered via corneal injection in participants with refractory herpetic viral keratitis.

Condition or disease Intervention/treatment Phase
Viral Keratitis Blindness Eye Herpes Simplex Virus Infection Cornea Drug: BD111 Adult single group Dose Not Applicable

Detailed Description:

This is an open-label, single ascending dose study of BD111 in adult (ages 18 to 70) participants with refractory herpetic viral keratitis. Approximately 6 participants will be enrolled.BD111 is a novel gene editing product designed to clear Herpes simplex virus type I (HSV-1) that results in herpetic stromal keratitis in both acute and recurrent infection models which is the leading factor for infectious blindness.

The follow-up period was 360 days, and the patients will be followed up 3±1 days, 7±2 days, 30±7 days, 90±14 days, 180±21 days, and 360+31 days after treatment.

Layout table for study information
Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 3 participants
Allocation: N/A
Intervention Model: Single Group Assignment
Intervention Model Description: Single group target value: Since there is no similar products approved on the market and there is no similar comparative treatment methods, the single group target value method is adopted
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: CRISPR/Cas9 mRNA Instantaneous Gene Editing Therapy Assisted Corneal Transplantation in the Treatment of Refractory Viral Keratitis
Actual Study Start Date : November 4, 2020
Actual Primary Completion Date : July 5, 2022
Actual Study Completion Date : July 5, 2022

Resource links provided by the National Library of Medicine

Arm Intervention/treatment
Experimental: BD111 Adults single group Dose
Administered by corneal injection surgery. Dosage form:injection solution. Dose:200uL. Frequency of administration: one time injection.
Drug: BD111 Adult single group Dose
3-6 Participants will receive a single group dose administered via corneal injection in the study eye.

Primary Outcome Measures :
  1. Effective clearance of HSV-1 genome [ Time Frame: 12 months ]
    Judge HSV-1 genome clearance effective according to DNA sequencing results by methods of Plaque assay,Elisa,PCR etc.

  2. Rate of reblindness in 3 participants with Refractory HSV Keratitis [ Time Frame: 12 months ]
    180 days after corneal surgical, calculate rate of reblindness of treated eye in 3 participants.

  3. HSV-1 virus testing outcome of the intervention eye [ Time Frame: 12 months ]
    Herpes virus content before and after treatment were determinated by methods of plaque assay, ELISA, PCR etc. Compare the viral content changes with baseline.

Secondary Outcome Measures :
  1. Corneal graft survival time [ Time Frame: 12 months ]
    Observe the survival time of grafted cornea in participants, whether the grafted cornea is transparency or opacity.

  2. Visual improvement compared with baseline [ Time Frame: 12 months ]
    Judge the visual recovery progress according to visual examination results on day 3±1,7±2,30±7,90±14,180±21,360±31.

  3. Concentration of dose limiting toxicities [ Time Frame: 12 months ]
    Observe and record AE,SAE incidence of dose limiting toxicities related with BD111 administration.

  4. Concentration of maximum tolerated dose [ Time Frame: 12 months ]
    Observe and record AE,SAE at maximum tolerated dose when occurs dose limiting toxicities.

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.

Layout table for eligibility information
Ages Eligible for Study:   18 Years to 70 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

Patients (replase) with refractory keratitis caused by herpes virus type I who has had at least one time failed corneal transplant.

  1. Age between 18 to 70 years.
  2. No systemic immune eye disease.
  3. Good eyelid structure and blink function.
  4. Exists the potential of visual recovery by evaluation of ocular structure and function.
  5. Patients with refractory keratitis who are repeatedly infected with HSV-1 virus (more than three times per year) and resistant to topical or systemic anti-viral agents, with no response to regular immunosuppressive agents.
  6. Patients who are obviously suffering from relapse HSV infections with corneal perforation, requiring corneal transplantation;
  7. No history of corneal trauma.
  8. Subjects or their legal guardians voluntarily participate in this study, sign informed consent, good compliance and cooperation with follow-up visits.

Exclusion Criteria:

  1. Lacrimal coating and blink function loss.
  2. Schirmer's test result is less than 2mm for severe dry eye disease.
  3. Pregnant and lactating women (pregnancy defined in this study as positive urine pregnancy test).
  4. Currently is involved in clinical trials of other drugs or medical devices.
  5. Active eye infection (including but not limited to: blepharitis, infectious conjunctivitis, keratitis, sclerotitis, endophthalmitis) in target eye or contralateral eye within 30 days prior to enrollment.
  6. Ocular surface malignant tumor.
  7. A history of allergic reaction or allergy to sodium luciferin, allergy to protein products used for treatment or diagnosis, allergy to ≥ 2 drugs or non-drug factors, or current allergic disease.
  8. current in an infectious disease requiring oral, intramuscular or intravenous administration.
  9. Patients with systemic immune diseases.
  10. Any uncontrolled clinical problems (such as severe mental, neurological, cardiovascular, respiratory and other systemic diseases and malignant neoplasms).
  11. Not effective contraception.
  12. In uncontrolled hypertension, systolic is no less than 160 mmhg, diastolic is no less than 100 mmhg.
  13. In uncontrolled diabetes, fasting glucose is no less than 10.0umol/L.
  14. Renal insufficiency, serum creatinine is more than 133umol/L.
  15. Arrhythmia, myocardial ischemia, myocardial infarction (diagnosed by electrocardiogram).
  16. Liver dysfunction, al ANINE aminotransferase and aspartate aminotransferase levels are higher than 80 IU/L.
  17. Platelet level is below 100,000 /uL or above 450,000 /uL.
  18. Hemoglobin level is below 10.0g/dL (male) or 9.0g/dL (female).
  19. No anticoagulant was used, prothrombin time is higher than 16s, and thrombin time of activated part is higher than 50s.
  20. HIV infection (HIV-positive).
  21. Subjects lack compliance with the study or the ability to sign informed consent.
  22. There are currently signs of systemic infection, including fever and ongoing antibiotic treatment (in this study, systemic infection was defined as deviation from normal values of white blood cells, lymphocytes, and neutrophils on routine blood tests).
  23. Administration of Glucocorticoids and other systemic immunosuppressive drugs.
  24. The investigator judges other conditions unsuitable for the trial

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 ClinicalTrials.gov identifier (NCT number): NCT04560790

Layout table for location information
China, Shanghai
Eye & Ent Hospital of Fudan University
Shanghai, Shanghai, China, 200000
Sponsors and Collaborators
Shanghai BDgene Co., Ltd.
Eye & ENT Hospital of Fudan University
Layout table for investigator information
Principal Investigator: Yujia Cai, PhD Shanghai BDgene Co., Ltd.
  Study Documents (Full-Text)

Documents provided by Shanghai BDgene Co., Ltd.:
Informed Consent Form  [PDF] April 12, 2020

Layout table for additonal information
Responsible Party: Shanghai BDgene Co., Ltd.
ClinicalTrials.gov Identifier: NCT04560790    
Other Study ID Numbers: JYMS-CXL#02
First Posted: September 23, 2020    Key Record Dates
Last Update Posted: August 24, 2022
Last Verified: August 2022
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No

Layout table for additional information
Studies a U.S. FDA-regulated Drug Product: No
Studies a U.S. FDA-regulated Device Product: No
Keywords provided by Shanghai BDgene Co., Ltd.:
Herpes simplex virus type 1 (HSV-1)
instantaneous gene editing
Additional relevant MeSH terms:
Layout table for MeSH terms
Herpes Simplex
Virus Diseases
Herpesviridae Infections
DNA Virus Infections
Skin Diseases, Viral
Skin Diseases, Infectious
Skin Diseases
Corneal Diseases
Eye Diseases
Vision Disorders
Sensation Disorders
Neurologic Manifestations
Nervous System Diseases