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2017 ; 6
(7
): 737-747
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Metformin causes a futile intestinal-hepatic cycle which increases energy
expenditure and slows down development of a type 2 diabetes-like state
#MMPMID28702329
Schommers P
; Thurau A
; Bultmann-Mellin I
; Guschlbauer M
; Klatt AR
; Rozman J
; Klingenspor M
; de Angelis MH
; Alber J
; Gründemann D
; Sterner-Kock A
; Wiesner RJ
Mol Metab
2017[Jul]; 6
(7
): 737-747
PMID28702329
show ga
OBJECTIVE: Metformin, the first line drug for treatment of type 2 diabetes,
suppresses hepatic gluconeogenesis and reduces body weight in patients, the
latter by an unknown mechanism. METHODS: Mice on a high fat diet were
continuously fed metformin in a therapeutically relevant dose, mimicking a
retarded formulation. RESULTS: Feeding metformin in pharmacologically relevant
doses to mice on a high fat diet normalized HbA1c levels and ameliorated glucose
tolerance, as expected, but also considerably slowed down weight gain. This was
due to increased energy expenditure, since food intake was unchanged and
locomotor activity was even decreased. Metformin caused lactate accumulation in
the intestinal wall and in portal venous blood but not in peripheral blood or the
liver. Increased conversion of glucose-1-(13)C to glucose-1,6-(13)C under
metformin strongly supports a futile cycle of lactic acid production in the
intestinal wall, and usage of the produced lactate for gluconeogenesis in liver.
CONCLUSIONS: The reported glucose-lactate-glucose cycle is a highly energy
consuming process, explaining the beneficial effects of metformin given
continuously on the development of a type 2 diabetic-like state in our mice.
|*Energy Metabolism
[MESH]
|Animals
[MESH]
|Diabetes Mellitus, Type 2/*drug therapy/etiology/metabolism
[MESH]
|Diet, High-Fat/adverse effects
[MESH]
|Glucose/metabolism
[MESH]
|Hypoglycemic Agents/*pharmacology/therapeutic use
[MESH]