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Effect of Folic Acid, Vitamin B6 and Vitamin B12 in Diabetic Retinopathy

The recruitment status of this study is unknown. The completion date has passed and the status has not been verified in more than two years.
Verified August 2013 by Mariano Malaguarnera, University of Catania.
Recruitment status was:  Recruiting
ClinicalTrials.gov Identifier:
First Posted: August 13, 2013
Last Update Posted: August 13, 2013
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.
Information provided by (Responsible Party):
Mariano Malaguarnera, University of Catania
Homocysteine, a well-known inducer of vascular endothelial cell damage has been associated with extracellular matrix changes. Many studies demonstrated that high levels of this aminoacid in diabetic patients increases significantly the risk of the development of this pathology. This study has been undertaken to investigate the role of homocysteine and its cofactors (folic acid, vitamin B6 and B12) during the progression of the diabetic retinopathy.

Condition Intervention Phase
Non Proliferative Diabetic Retinopathy Proliferative Diabetic Retinopathy Drug: Folic Acid, vit B6 and B12 Drug: Placebo Phase 4

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Triple (Participant, Investigator, Outcomes Assessor)
Primary Purpose: Treatment

Resource links provided by NLM:

Further study details as provided by Mariano Malaguarnera, University of Catania:

Primary Outcome Measures:
  • homocysteine [ Time Frame: 12 months ]

Secondary Outcome Measures:
  • folic acid [ Time Frame: 12 months ]

Other Outcome Measures:
  • vitamin B6 [ Time Frame: 12 months ]
  • vitamin B12 [ Time Frame: 12 months ]

Estimated Enrollment: 160
Study Start Date: September 2012
Estimated Primary Completion Date: July 2014 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Active Comparator: Folic Acid, vit B6 and B12 Drug: Folic Acid, vit B6 and B12
Placebo Comparator: Sugar pill Drug: Placebo


Information from the National Library of Medicine

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Ages Eligible for Study:   40 Years to 65 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • diabetic patients with proliferative and non proliferative retinopathy

Exclusion Criteria:

  • Patients with chronic liver disease Patients with kidney disease.
  Contacts and Locations
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): NCT01921192

Contact: Mariano Malaguarnera, A.P. +39(0)957262008 malaguar@unict.it

University of Catania, Cannizzaro Hospital Recruiting
Catania, Italy, 95125
Sponsors and Collaborators
University of Catania
  More Information

Responsible Party: Mariano Malaguarnera, Associate Professor, University of Catania
ClinicalTrials.gov Identifier: NCT01921192     History of Changes
Other Study ID Numbers: 1/2012
First Submitted: August 8, 2013
First Posted: August 13, 2013
Last Update Posted: August 13, 2013
Last Verified: August 2013

Additional relevant MeSH terms:
Retinal Diseases
Diabetic Retinopathy
Eye Diseases
Diabetic Angiopathies
Vascular Diseases
Cardiovascular Diseases
Diabetes Complications
Diabetes Mellitus
Endocrine System Diseases
Folic Acid
Vitamin B Complex
Vitamin B 6
Growth Substances
Physiological Effects of Drugs