Pancreatic α-cell mass in obesity

TY - JOUR

T1 - Pancreatic α-cell mass in obesity

AU - Ellenbroek, Johanne H

AU - Töns, Hendrica A M

AU - Hanegraaf, Maaike A J

AU - Rabelink, Ton J

AU - Engelse, Marten A

AU - Carlotti, Françoise

AU - de Koning, Eelco J P

N1 - © 2017 John Wiley & Sons Ltd.

PY - 2017/12

Y1 - 2017/12

N2 - While it is well recognized that obesity is associated with an increased β-cell mass, the association with α-cell mass is less clear. Type 2 diabetes (T2DM) associated with obesity is a bihormonal disease characterized by inadequate insulin secretion and hyperglucagonaemia. We examined β- and α-cell mass throughout the pancreas in obese and lean subjects. Pancreatic tissue of the head, body and tail region of the pancreas was examined from 15 obese subjects (body mass index [BMI] ≥ 27 kg/m2 ) and 15 age-matched lean subjects (BMI ≤ 25 kg/m2 ) without diabetes. In obese subjects both β- and α-cell mass were proportionally higher compared with lean subjects, thereby maintaining the α- to β-cell ratio. The adaptation to obesity occurred preferentially in the head of the pancreas. As data so far have been derived from histological studies of β- and α-cell adaptation, in which the head region of the human pancreas was not included, the adaptive capacity of humans to obesity has previously been underestimated. Obesity is associated with an increased α-cell mass, which could contribute to the hyperglucagonaemia observed in people with T2DM.

AB - While it is well recognized that obesity is associated with an increased β-cell mass, the association with α-cell mass is less clear. Type 2 diabetes (T2DM) associated with obesity is a bihormonal disease characterized by inadequate insulin secretion and hyperglucagonaemia. We examined β- and α-cell mass throughout the pancreas in obese and lean subjects. Pancreatic tissue of the head, body and tail region of the pancreas was examined from 15 obese subjects (body mass index [BMI] ≥ 27 kg/m2 ) and 15 age-matched lean subjects (BMI ≤ 25 kg/m2 ) without diabetes. In obese subjects both β- and α-cell mass were proportionally higher compared with lean subjects, thereby maintaining the α- to β-cell ratio. The adaptation to obesity occurred preferentially in the head of the pancreas. As data so far have been derived from histological studies of β- and α-cell adaptation, in which the head region of the human pancreas was not included, the adaptive capacity of humans to obesity has previously been underestimated. Obesity is associated with an increased α-cell mass, which could contribute to the hyperglucagonaemia observed in people with T2DM.

KW - Journal Article

U2 - 10.1111/dom.12997

DO - 10.1111/dom.12997

M3 - Article

C2 - 28474364

SN - 1462-8902

VL - 19

SP - 1810

EP - 1813

JO - Diabetes, Obesity and Metabolism

JF - Diabetes, Obesity and Metabolism

IS - 12

ER -