Exp Clin Endocrinol Diabetes 2022; 130(01): 55-60
DOI: 10.1055/a-1220-6160
Article

Glucagon and Liver Fat are Downregulated in Response to Very Low-calorie Diet in Patients with Obesity and Type-2 Diabetes

Stephan L. Haas
1   Department of Medicine (H7), Karolinska Institutet, Karolinska University Hospital Huddinge, Stockholm, Sweden
,
Patrik Löfgren
1   Department of Medicine (H7), Karolinska Institutet, Karolinska University Hospital Huddinge, Stockholm, Sweden
,
Per Stål
1   Department of Medicine (H7), Karolinska Institutet, Karolinska University Hospital Huddinge, Stockholm, Sweden
,
Johan Hoffstedt
1   Department of Medicine (H7), Karolinska Institutet, Karolinska University Hospital Huddinge, Stockholm, Sweden
› Author Affiliations

Abstract

Background and Study Aims In patients with obesity and type-2 diabetes, short-time very low-calorie diet may ameliorate hyperglycemia and hepatic steatosis. Whether this also implies the glucose-regulating hormone glucagon remains to be elucidated. This study investigated the effects of a very low-calorie diet on plasma levels of glucagon and liver fat in obese patients with type-2 diabetes.

Patients and Methods Ten obese patients with type-2 diabetes, 6 men and 4 women, were included. At baseline, fasting plasma glucagon, insulin and glucose were determined, and liver fat and stiffness evaluated by transient elastography. The subjects were then prescribed a very low-calorie diet of maximum 800 kcal/day for 7 weeks and reexamined after 7 weeks and 12 months.

Results At baseline, BMI was 42±4 kg/m2 and fasting glucose 10.6±3.4 mmol/l. All patients had hepatic steatosis. Plasma glucagon was strongly related to liver fat (r2=0.52, p=0.018). After 7 weeks of very low-calorie diet, plasma glucagon was significantly decreased by nearly 30% (p=0.004) along with reductions of BMI (p<0.0001), glucose (p=0.02), insulin (p=0.03), liver fat (p=0.007) and liver stiffness (p=0.05). At 12 months follow-up, both glucagon and liver fat increased and were not different to basal levels, despite persistent reductions of BMI (p<0.002) and glucose (p=0.008).

Conclusion In obese type-2 diabetic subjects, plasma glucagon and liver fat are correlated and similarly affected by a very low-calorie diet, supporting a role of hepatic steatosis in glucagon metabolism.



Publication History

Received: 26 May 2020
Received: 02 July 2020

Accepted: 13 July 2020

Article published online:
06 August 2020

Georg Thieme Verlag KG
Rüdigerstraße 14, 70469 Stuttgart, Germany

 
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