title: Diabetes mellitus in Tropical Chronic Pancreatitis Is Not Just a Secondary Type of Diabetes.
abstract: OBJECTIVE
  In chronic calcific pancreatitis of the tropics, etiology and relationship to developing diabetes mellitus are unknown. Some consider these cases a straightforward secondary type of diabetes, while others suggest selective beta-cell impairment. Testing pancreatic function, we investigated whether selective beta-cell impairment triggers diabetes associated with tropical pancreatitis.
  
  
  METHODS
  At a Bangladeshi research institute, 8 chronic tropical pancreatitis and no diabetes mellitus subjects, 14 fibrocalculous pancreatic diabetics and 27 matched healthy controls underwent arginine (endocrine pancreatic function) and secretin (exocrine pancreatic function assessment) stimulation tests.
  
  
  RESULTS
  All patients with clinically-diagnosed, chronic pancreatitis demonstrated pronounced exocrine pancreatic dysfunction with beta-cell functioning differing significantly between the two groups. Compared to controls, patients having tropical pancreatitis and no diabetes showed normal plasma C-peptide values at baseline and after arginine stimulation, while fibrocalculous pancreatic diabetics demonstrated a typical diabetic pattern for plasma C-peptide levels. In contrast, pancreatic alpha-cell functioning (glucagon response to arginine) was preserved in both pancreatitis groups.
  
  
  CONCLUSIONS
  A preserved pancreatic alpha-cell function in diabetics with advanced chronic pancreatitis of the tropics supports the concept of two different pathogenic mechanisms, one eliciting chronic pancreatitis and the other selective pancreatic beta-cell impairment and subsequent diabetes mellitus.
authors.affiliation: University Hospital, Department of Medicine, Basel, Switzerland.
authors.forename: L
authors.initials: L
authors.lastname: Rossi
authors.forename: S
authors.initials: S
authors.lastname: Parvin
authors.forename: Z
authors.initials: Z
authors.lastname: Hassan
authors.forename: P
authors.initials: P
authors.lastname: Hildebrand
authors.forename: U
authors.initials: U
authors.lastname: Keller
authors.forename: L
authors.initials: L
authors.lastname: Ali
authors.forename: C
authors.initials: C
authors.lastname: Beglinger
authors.forename: A K
authors.initials: AK
authors.lastname: Azad Khan
authors.forename: David C
authors.initials: DC
authors.lastname: Whitcomb
authors.forename: N
authors.initials: N
authors.lastname: Gyr
mesh_terms: D000328:Adult; D001120:Arginine; D002114:Calcinosis / Q000209:etiology*; D016022:Case-Control Studies; D048909:Diabetes Complications; D005260:Female; D006801:Humans; D007515:Islets of Langerhans / Q000503:physiopathology; D008297:Male; D046790:Pancreas, Exocrine / Q000503:physiopathology; D010182:Pancreatic Diseases / Q000209:etiology* / Q000503:physiopathology; D010195:Pancreatitis / Q000209:etiology / Q000503:physiopathology; D012633:Secretin; D014329:Tropical Climate
chemical_list: D012633:Secretin; D001120:Arginine