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Study On the Role of Mitochondrial Dysfunction in the Pathogenesis of Metformin-associated Lactic Acidosis

This study has been completed.
Information provided by (Responsible Party):
Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico Identifier:
First received: July 16, 2009
Last updated: September 26, 2013
Last verified: September 2013

Metformin is the first line drug of choice for the treatment of type II diabetes. Lactic acidosis can develop as a side effect, especially when renal failure leads to drug accumulation. Lactic acidosis is usually attributed to an abnormal inhibition of hepatic lactate clearance.

Growing evidence suggest that metformin can dose-dependently inhibit hepatocyte mitochondrial function. Whether a similar effect occurs in extra-hepatic human tissues remains unknown.

The investigators hypothesize that mitochondrial dysfunction occurs during metformin intoxication even in tissues other than the liver, thus contributing to the development of lactic acidosis. The aim of this study is to investigate mitochondrial integrity in circulating platelets of patients with lactic acidosis due to metformin intoxication.

Lactic Acidosis

Study Type: Observational
Study Design: Observational Model: Case-Only
Time Perspective: Prospective
Official Title: On the Role of Mitochondrial Dysfunction in the Pathogenesis of Metformin-associated Lactic Acidosis

Resource links provided by NLM:

Further study details as provided by Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico:

Primary Outcome Measures:
  • Platelet mitochondrial respiratory chain enzyme activity [ Time Frame: Within 48 hours from admission to ICU ]

Enrollment: 10
Study Start Date: January 2009
Study Completion Date: October 2011
Primary Completion Date: December 2010 (Final data collection date for primary outcome measure)

Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Sampling Method:   Probability Sample
Study Population
Patients with lactic acidosis and metformin intoxication (as documented by drug serum measurement)

Inclusion Criteria:

  1. Lactic acidosis (pH < 7.35 or base deficit > 5 mmol/L and lactate > 5 mmol/L)
  2. Metformin intoxication (serum drug level > 4 mcg/mL)
  3. Absence of evidence of any other condition that could primarily explain the lactic acidosis

Exclusion Criteria:

  1. Less than 18 years of age
  2. Hemoglobin < 8 g/dL (10 g/dL if ischemic cardiac disease)
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Please refer to this study by its identifier: NCT00942123

Ospedale Maggiore Policlinico
Milano, MI, Italy, 20122
Sponsors and Collaborators
Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico
  More Information

Publications automatically indexed to this study by Identifier (NCT Number):
Responsible Party: Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico Identifier: NCT00942123     History of Changes
Other Study ID Numbers: 2551
Study First Received: July 16, 2009
Last Updated: September 26, 2013

Additional relevant MeSH terms:
Acidosis, Lactic
Acid-Base Imbalance
Metabolic Diseases
Hypoglycemic Agents
Physiological Effects of Drugs processed this record on May 25, 2017