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At similar weight loss, dietary composition determines the degree of glycemic improvement in diet-induced obese C57BL/6 mice

Vangoitsenhoven, Roman; van der Ende, Miranda; Corbeels, Katrien; Monteiro Carvalho Mori Cunha, João Paulo LU ; Lannoo, Matthias; Bedossa, Pierre; van der Merwe, Schalk; Mertens, Ann; Gesquiere, Ina and Meulemans, Ann, et al. (2018) In PLoS ONE 13(7). p.1-16
Abstract

BACKGROUND: Achieving weight loss is the cornerstone of the treatment of the metabolic consequences of obesity, in particular of glucose intolerance.

OBJECTIVE: To determine whether improvement in glucose control depends on dietary macronutrient composition of the diet at identical weight loss.

MATERIALS AND METHODS: Twenty-two weeks old diet-induced obese C57BL/6 mice lost weight through caloric restriction on normal chow (R-NC) or high fat diet (R-HF). Control mice were fed normal chow (LEAN) or high fat diet (OBESE) ad libitum. Body weight and composition were assessed after 8 weeks of dietary intervention. Glucose homeostasis was evaluated by intraperitoneal glucose tolerance tests (IPGTT). Epididymal white adipose... (More)

BACKGROUND: Achieving weight loss is the cornerstone of the treatment of the metabolic consequences of obesity, in particular of glucose intolerance.

OBJECTIVE: To determine whether improvement in glucose control depends on dietary macronutrient composition of the diet at identical weight loss.

MATERIALS AND METHODS: Twenty-two weeks old diet-induced obese C57BL/6 mice lost weight through caloric restriction on normal chow (R-NC) or high fat diet (R-HF). Control mice were fed normal chow (LEAN) or high fat diet (OBESE) ad libitum. Body weight and composition were assessed after 8 weeks of dietary intervention. Glucose homeostasis was evaluated by intraperitoneal glucose tolerance tests (IPGTT). Epididymal white adipose (eWAT) and hepatic tissues were analyzed by immunohistochemistry and RT-qPCR.

RESULTS: By 30 weeks of age, the body weight of the mice on R-NC (31.6±1.7g, mean±SEM) and R-HF (32.3±0.9g) was similar to LEAN mice (31.9±1.4g), while OBESE mice weighed 51.7±2.4g. Glucose tolerance in R-NC was better than in LEAN mice (69% AUC IPGTT, P 0.0168) whereas R-HF mice remained significantly less glucose tolerant (125% AUC IPGTT, P 0.0279 vs LEAN), despite identical weight loss. The eWAT pads and adipocyte size were similar in LEAN and R-NC mice, while the eWAT pad size of R-HF was 180% of R-NC (P < 0.0001) and the average adipocyte size of R-HF mice was 134% of R-NC fed mice (P 0.0285). No LEAN or R-NC mice had hepatic steatosis, in contrast to 28.6% of R-HF mice. Compared to OBESE mice, inflammatory markers were lower in eWAT and liver tissue of R-NC, but not in R-HF mice. Measures of visceral adiposity correlated well with glucose tolerance parameters.

CONCLUSIONS: In mice, caloric restriction on a normal chow diet improved glucose tolerance significantly more when identical weight loss was achieved on a high fat diet.

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@article{82914ec3-bb87-4e37-b048-f09162d6bf16,
  abstract     = {<p>BACKGROUND: Achieving weight loss is the cornerstone of the treatment of the metabolic consequences of obesity, in particular of glucose intolerance.</p><p>OBJECTIVE: To determine whether improvement in glucose control depends on dietary macronutrient composition of the diet at identical weight loss.</p><p>MATERIALS AND METHODS: Twenty-two weeks old diet-induced obese C57BL/6 mice lost weight through caloric restriction on normal chow (R-NC) or high fat diet (R-HF). Control mice were fed normal chow (LEAN) or high fat diet (OBESE) ad libitum. Body weight and composition were assessed after 8 weeks of dietary intervention. Glucose homeostasis was evaluated by intraperitoneal glucose tolerance tests (IPGTT). Epididymal white adipose (eWAT) and hepatic tissues were analyzed by immunohistochemistry and RT-qPCR.</p><p>RESULTS: By 30 weeks of age, the body weight of the mice on R-NC (31.6±1.7g, mean±SEM) and R-HF (32.3±0.9g) was similar to LEAN mice (31.9±1.4g), while OBESE mice weighed 51.7±2.4g. Glucose tolerance in R-NC was better than in LEAN mice (69% AUC IPGTT, P 0.0168) whereas R-HF mice remained significantly less glucose tolerant (125% AUC IPGTT, P 0.0279 vs LEAN), despite identical weight loss. The eWAT pads and adipocyte size were similar in LEAN and R-NC mice, while the eWAT pad size of R-HF was 180% of R-NC (P &lt; 0.0001) and the average adipocyte size of R-HF mice was 134% of R-NC fed mice (P 0.0285). No LEAN or R-NC mice had hepatic steatosis, in contrast to 28.6% of R-HF mice. Compared to OBESE mice, inflammatory markers were lower in eWAT and liver tissue of R-NC, but not in R-HF mice. Measures of visceral adiposity correlated well with glucose tolerance parameters.</p><p>CONCLUSIONS: In mice, caloric restriction on a normal chow diet improved glucose tolerance significantly more when identical weight loss was achieved on a high fat diet.</p>},
  articleno    = {e0200779},
  author       = {Vangoitsenhoven, Roman and van der Ende, Miranda and Corbeels, Katrien and Monteiro Carvalho Mori Cunha, João Paulo and Lannoo, Matthias and Bedossa, Pierre and van der Merwe, Schalk and Mertens, Ann and Gesquiere, Ina and Meulemans, Ann and Matthys, Christophe and Mathieu, Chantal and Overbergh, Lut and Van der Schueren, Bart},
  issn         = {1932-6203},
  keyword      = {Adipocytes/metabolism,Adipose Tissue/metabolism,Adipose Tissue, White/metabolism,Adiposity,Animals,Blood Glucose/metabolism,Body Composition,Body Weight,Caloric Restriction,Calorimetry,Diet, High-Fat,Dietary Fats/metabolism,Eating,Fatty Liver/metabolism,Glucose/chemistry,Glucose Intolerance/metabolism,Homeostasis,Inflammation,Male,Mice,Mice, Inbred C57BL,Mice, Obese/genetics,Nutrients/chemistry,Obesity/metabolism,Weight Loss},
  language     = {eng},
  number       = {7},
  pages        = {1--16},
  publisher    = {Public Library of Science},
  series       = {PLoS ONE},
  title        = {At similar weight loss, dietary composition determines the degree of glycemic improvement in diet-induced obese C57BL/6 mice},
  url          = {http://dx.doi.org/10.1371/journal.pone.0200779},
  volume       = {13},
  year         = {2018},
}