SLC2A1 Variants and Diabetic Nephropathy

January 15, 2013 updated by: University of Sao Paulo General Hospital

Association of Single Nucleotide Polymorphisms in the Gene Coding GLUT-1 and Diabetic Nephropathy in Brazilian Patients With Type 1 Diabetes Mellitus

Cells damaged by hyperglycemia are unable to downregulate glucose entrance in presence of high extracellular glucose resulting in intracellular activation of deleterious biochemical pathways. Expression of GLUT-1, the major glucose transporter in mesangial cells, is increased and participates in the induction of diabetic nephropathy. Variants in the gene encoding GLUT-1 (SLC2A1) have been associated to this diabetic complication. The aim of this study was to test whether polymorphisms in SLC2A1 confer susceptibility to diabetic nephropathy in Brazilian type 1 diabetes patients.

Study Overview

Status

Completed

Conditions

Detailed Description

In this study, 449 patients, included between October 2004 and October 2012, were sorted into three groups according to diabetic nephropathy stages: without (persistent normoalbuminuria, n=248), incipient (microalbuminuria, n=82) and overt diabetic nephropathy (macroalbuminuria or proteinuria or renal replacement therapy, n=119). Measurements of urinary albumin-to-creatinine ratio (ACR) or urinary albumin excretion rate (UAER) were used to define DN: patients with persistent normoalbuminuria (<30 mg/g creatinine or <20 μg/min) were classified as without DN (n=248); patients presenting persistent microalbuminuria (30-300 mg/g creatinine or 20-200 μg/min) were classified as having incipient DN (n=82); and patients presenting persistent macroalbuminuria (>300 mg/g creatinine or >200 µg/min), proteinuria (>500 mg/24 h) or renal replacement therapy were classified as having overt DN (n=119). Genotyping of polymorphisms was performed by Real Time PCR using fluorescent -labelled probes.

Study Type

Observational

Enrollment (Actual)

449

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Brazil
    • SP
      • São Paulo, SP, Brazil, 01246-000
        • FACULDADE DE MEDICINA DA USP

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

11 years and older (Child, Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Probability Sample

Study Population

449 patients with type 1 diabetes (56.4% female, mean age 36.0±11.0 years) were included between October 2004 and October 2012. Inclusion criterion was type 1 diabetes duration ≥10 years. The patients presented a mixed ethnic background (European Caucasian, African, Amerindian and Asian of several different countries of origin), which reflects the Brazilian population.

Description

Inclusion Criteria:

  • Overt 10 years of Diabetes Mellitus

Exclusion Criteria:

  • Patients presenting autoimmune diseases, HIV or HCV infections
  • Patients with glomerular filtration rate < 60 mL min-1 1.73 m2 without diabetic retinopathy

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

  • Observational Models: Case-Only
  • Time Perspectives: Cross-Sectional

Cohorts and Interventions

Group / Cohort
Withou Diabetic Nephropathy
Patients who have persistent normoalbuminuria (<30 mg/g creatinine or <20 μg/min).
Incipient Nephropathy
Patients who have persistent microalbuminuria (30-300 mg/g creatinine or 20-200 μg/min).
Overt Diabetic Nephropathy
Patients who have persistent macroalbuminuria (>300 mg/g creatinine or >200 µg/min), proteinuria (>500 mg/24 h) or renal replacement therapy.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Plasmatic Creatinine
Time Frame: Two years
Two years

Collaborators and Investigators

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

Sponsor

University of Sao Paulo General Hospital

Investigators

  • Principal Investigator: Maria L Côrrea-Giannela, Doctor, Hospital Clínicas/Faculdade de Medicina da USP

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

October 1, 2004

Primary Completion (Actual)

October 1, 2012

Study Completion (Actual)

October 1, 2012

Study Registration Dates

First Submitted

December 17, 2012

First Submitted That Met QC Criteria

January 11, 2013

First Posted (Estimate)

January 15, 2013

Study Record Updates

Last Update Posted (Estimate)

January 16, 2013

Last Update Submitted That Met QC Criteria

January 15, 2013

Last Verified

January 1, 2013

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • FMUSP-LIM25-001

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.

Clinical Trials on Diabetic Nephropathy.

Search Similar Trials

Sponsors and Collaborators

Medical Conditions

Drug Interventions

CROs by country

CROs in Papua New Guinea

Conditions

Rare Diseases

Drug Interventions

Dietary Supplements

Sponsor/Collaborators

Locations

3
Subscribe