title: Vegetarian diet affects genes of oxidative metabolism and collagen synthesis.
abstract: OBJECTIVE
  A vegetarian diet is known to prevent a series of diseases but may influence the balance of carbohydrate and fat metabolism as well as collagen synthesis. This study compares expression patterns of relevant genes in oral mucosa of omnivores and vegetarians.
  
  
  METHODS
  Quantitative reverse transcriptase polymerase chain reaction was applied for analysis of mRNA levels from carnitine transporter OCTN2, hepatic CPT1A and nonhepatic CPT1B isoforms of carnitine palmitoyltransferase and collagen (CCOL2A1) in oral mucosa.
  
  
  RESULTS
  Compared with volunteers with traditional eating habits, carbohydrate consumption was significantly higher (+22%) in vegetarians. This was associated with a significant stimulation of CPT1A (+50%) and OCTN2 (+10%) and a lowered collagen synthesis (-10%).
  
  
  CONCLUSIONS
  These novel findings provide further insight into the association of a changed fat metabolism and reduced collagen synthesis in vegetarians, which could also play a role in the aging process.
authors.affiliation: Ludwig Boltzmann Institute for Leukemia Research and Hematology, Hanusch Hospital, Vienna, Austria. heidrun.karlic@meduniwien.ac.at
authors.forename: Heidrun
authors.initials: H
authors.lastname: Karlic
authors.forename: Daniela
authors.initials: D
authors.lastname: Schuster
authors.forename: Franz
authors.initials: F
authors.lastname: Varga
authors.forename: Gerhard
authors.initials: G
authors.lastname: Klindert
authors.forename: Alexander
authors.initials: A
authors.lastname: Lapin
authors.forename: Alexander
authors.initials: A
authors.lastname: Haslberger
authors.forename: Michael
authors.initials: M
authors.lastname: Handschur
mesh_terms: D000293:Adolescent; D000328:Adult; D002331:Carnitine / Q000235:genetics / Q000378:metabolism; D002334:Carnitine O-Palmitoyltransferase / Q000235:genetics / Q000378:metabolism*; D003094:Collagen / Q000096:biosynthesis* / Q000235:genetics; D014676:Diet, Vegetarian; D004734:Energy Metabolism / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D009061:Mouth Mucosa / Q000378:metabolism*; D027701:Organic Cation Transport Proteins / Q000096:biosynthesis* / Q000235:genetics; D010084:Oxidation-Reduction; D012333:RNA, Messenger / Q000096:biosynthesis / Q000235:genetics; D020133:Reverse Transcriptase Polymerase Chain Reaction; D055815:Young Adult
chemical_list: D027701:Organic Cation Transport Proteins; D012333:RNA, Messenger; D003094:Collagen; D002334:Carnitine O-Palmitoyltransferase; D002331:Carnitine