Effects of Adding Triamcinolone Acetonide to Conbercept Treatment for Refractory Diabetic Macular Edema (CONTE) (CONTE)

November 14, 2020 updated by: Bingqian Liu, Zhongshan Ophthalmic Center, Sun Yat-sen University

Effects of Adding Triamcinolone Acetonide to Conbercept in Diabetic Macular Edema With Limited Response to Anti-VEGF Treatment After One Injection

This study aimed to compare intravitreous conbercept alone with conbercept plus intravitreous triamcinolone acetonide in DME eyes which showed limited response to anti-VEGF treatment after one injection.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Unknown

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

Some eyes with diabetic macular edema (DME) were not sensitive to anti-vascular endothelial growth factor (anti-VEGF) therapy and required continuous injections. Delayed control of macular edema might cause irreversible function loss. To predict the response to anti-VEGF treatment according to the CST change after one injection was proved reasonable recently. Adding intravitreous corticosteroids to the treatment regimen at early time might result in better outcomes than anti-VEGF therapy alone. Patients with diagnosis of refractory diabetic macular edema, confirmed by fluorangiography and optical coherence tomography (OCT), with limited response to one intravitreal anti-VEGF injection will be enrolled in the study. The enrolled patients will be randomized for the addition or not of the triamcinolone to intravitreal therapy.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Anticipated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
50

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Not Applicable

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

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Locations

  • China
    • Guangdong
      • Guangzhou, Guangdong, China, 510060
        • Recruiting
        • Zhongshan Opthalmic Center
        • Contact:
        • Principal Investigator:
          • Bingqian Liu, MD, PhD

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

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Type II diabetes
  • Vison decrease was mainly caused by diabetic macular edema (DME)
  • BCVA of 20/800 to 20/40 (decimal)
  • Central subfield retinal thickness (CST) ≥ 300μm by optical coherence tomography (OCT) in the study eye
  • Pan-retinal photocoagulation finished at least 3 months ago, or no pan-retinal photocoagulation is expected in the next 6 months
  • Within the last 3 months, one intravitreous injection of anti-VEGF agent was performed, the CST reduction one month after injection was ≤ 20%.

Exclusion Criteria:

  • Non-DME related macular edema, or edema control would not benefit the vision (for example, macular atrophy)
  • Exist of other reasons of macular edema, retinal vein occlusion, uveitis, iris rubeosis, high myopia
  • Ocular media opacity of insufficient quality to obtain OCT images and fundus images in the study eye
  • Intraocular or periorbital injection of steroids within the last 3 months
  • Macular grid photocoagulation within the last 4 months
  • History of vitrectomy
  • History of scleral buckle within the last 4 months, or intraocular surgery is expected in the next 6 months
  • Any sign of ocular infection, including conjunctivitis, hordeolum, dacryocystitis
  • Myocardial infarction, heart failure, stroke, or transient ischemic attack within one month
  • Pregnant or breastfeeding women
  • Uncontrolled hypertension, or blood pressure >180/110
  • Patients with uncontrolled hyperglycemia, or Hemoglobin A1C (HbA1c) ≥10.0%, or under hemodialysis , or started insulin usage within the last 4 months, or expected to start insulin use for hyperglycemia control in the next 4 months
  • Those cannot follow visits on time

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: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Single

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: Injection combo agents
Intravitreous injection of triamcinolone acetonide (TA) and conbercept.
Drug: Conbercept and TA
Intravitreous injection of Conbercept and TA
Other Names:
  • Combined agents
Active Comparator: Injection single agent
Intravitreous injection of conbercept only.
Drug: Conbercept
Intravitreous injection of Conbercept
Other Names:
  • Single agent

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Macular thickness
Time Frame: 24 weeks
Change in mean central subfield thickness from randomization visit measured with optical coherence tomography.
24 weeks

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Best-corrected visual acuity (BCVA)
Time Frame: 48 weeks
Change in BCVA letter score from randomization visit as measured by the Early Treatment Diabetic Retinopathy Study (ETDRS).
48 weeks
Treatment number
Time Frame: 48 weeks
The number of intravitreous injection treatments
48 weeks
Incidence of complications
Time Frame: 48 weeks
The incidence of cataract and glaucoma
48 weeks

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Zhongshan Ophthalmic Center, Sun Yat-sen University

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Bingqian Liu, MD, PhD, Zhongshan Ophthamic Center, Sun Yat-sen University

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

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 (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
November 12, 2020

Primary Completion (Anticipated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
June 1, 2021

Study Completion (Anticipated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
December 31, 2021

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
October 29, 2020

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
November 10, 2020

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
November 13, 2020

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
November 17, 2020

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
November 14, 2020

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
November 1, 2020

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • 2020KYPJ127

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

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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