title: The polymorphism of type 1 collagen (COL1A1) gene does not correlate with an increased risk of foot ulcers in patients with diabetes mellitus.
abstract: OBJECTIVE
  Diabetic foot syndrome (DFS) is a multifactorial debilitating complication of diabetes mellitus (DM). The identification of markers for predicting the risk of developing DFS could help and direct the efforts in the prevention to the highest risk patients. Type I collagen α1 (COL1A1) is the main component of type I collagen, the most abundant structural protein of the extracellular matrix of subcutaneous tissue. COL1A1 polymorphism has been previously investigated with regard to many clinical conditions affecting the bone or the skin. In this prospective study, we have assessed COL1A1 polymorphism in patients without and with DFS.
  
  
  METHODS
  202 DM patients without and 103 patients with DFS have been recruited. COL1A1 polymorphism, due to a mutation affecting the zinc-finger transcription factor specific protein, has been investigated. The most relevant clinical data (HbA1c, vascular risk factors, insulin treatment) have been collected and analyzed.
  
  
  RESULTS
  No statistically significant difference in the distribution of the 3 genotypes constituting COL1A1 polymorphism between patients without and with DFS has been observed. Almost all DFS patients had at least one vascular risk factor, with a high rate of arterial hypertension and dyslipidemia.
  
  
  CONCLUSIONS
  A multifaceted set of factors is involved in the development of DFS and only a combination of them may lead to such occurrence. In our DM patient population, COL1A1 polymorphism does not correlate with the occurrence of DFS, which appears to depend mostly on the presence of vascular risk factors. However, the impact of genetic factors affecting other components of the subcutaneous tissue cannot be excluded.
authors.affiliation: Division of Endocrinology & Diabetology, Department of Gastroenterology, Endocrinology and Metabolism, University Hospital of Giessen and Marburg - Philipp's University, Marburg, Germany.
authors.forename: G
authors.initials: G
authors.lastname: Tamagno
authors.affiliation: Division of Endocrinology & Diabetology, Department of Gastroenterology, Endocrinology and Metabolism, University Hospital of Giessen and Marburg - Philipp's University, Marburg, Germany.
authors.forename: K
authors.initials: K
authors.lastname: Fedtke
authors.affiliation: Diabetology Marburg, Marburg, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Eidenmüller
authors.affiliation: Division of Vascular Surgery and Transplantations, Department of Visceral, Thoracic and Vascular Surgery, University Hospital of Giessen and Marburg - Philipp's University, Marburg, Germany.
authors.forename: J
authors.initials: J
authors.lastname: Geks
authors.affiliation: Diabetes Clinic Bad Nauheim, Bad Nauheim, Germany.
authors.forename: A
authors.initials: A
authors.lastname: Hamann
authors.affiliation: Department of Medicine II, Hospital of Darmstadt, Germany.
authors.forename: K
authors.initials: K
authors.lastname: Langer
authors.affiliation: Division of Endocrinology & Diabetology, Department of Gastroenterology, Endocrinology and Metabolism, University Hospital of Giessen and Marburg - Philipp's University, Marburg, Germany.
authors.forename: P H
authors.initials: PH
authors.lastname: Kann
mesh_terms: D000368:Aged; D024042:Collagen Type I / Q000235:genetics*; D000090602:Collagen Type I, alpha 1 Chain; D003920:Diabetes Mellitus / Q000235:genetics*; D017719:Diabetic Foot / Q000235:genetics*; D005260:Female; D056726:Genetic Association Studies; D020022:Genetic Predisposition to Disease; D005838:Genotype; D006801:Humans; D008297:Male; D008875:Middle Aged; D020641:Polymorphism, Single Nucleotide; D011446:Prospective Studies; D012307:Risk Factors
chemical_list: D024042:Collagen Type I; D000090602:Collagen Type I, alpha 1 Chain