Cross-sectional assessment of the effect of kidney and kidney-pancreas transplantation on resting left ventricular energy metabolism in type 1 diabetic-uremic patients: a phosphorous-31 magnetic resonance spectroscopy study.
OBJECTIVE
To test whether left ventricular (LV) dysfunction affecting type 1 diabetic-uremic patients was associated with abnormal heart high-energy phosphates (HEPs) and to ascertain whether these alterations were also present in recipients of kidney or kidney-pancreas transplantation.


BACKGROUND
Heart failure is the major determinant of mortality in patients with diabetic uremia. Both uremia and diabetes induce alterations of cardiac HEPs metabolism.


METHODS
Magnetic resonance imaging and phosphorous magnetic resonance spectroscopy of the LV were performed in the resting state by means of a 1.5-T clinical scanner. Eleven diabetic-uremic patients, 5 nondiabetic patients with uremia, 11 diabetic recipients of kidney transplantation, and 16 diabetic recipients of combined kidney-pancreas transplantation were studied in a cross-sectional fashion. Eleven nondiabetic recipients of kidney-only transplant and 13 healthy subjects served as control groups.


RESULTS
Uremic patients had higher LV mass, diastolic dysfunction, and lower phosphocreatine (PCr)/adenosine triphosphate (ATP) ratio in comparison with recipients of kidney-pancreas or nondiabetic recipients of kidney transplant. In diabetic recipients of kidney transplant the PCr/ATP ratio was higher than in uremic patients but was lower than in the controls. Recipients of combined kidney-pancreas transplant had a higher ratio than uremic patients but no difference was found in comparison with controls.


CONCLUSIONS
Altered resting myocardial HEPs metabolism may contribute to LV dysfunction in diabetic-uremic patients. In diabetic recipients of kidney transplantation, a certain degree of LV metabolic and functional impairment was found. In combined kidney-pancreas recipients the resting LV metabolism and function were not different than in controls.
Perseghin
Gianluca
G
Division of Internal Medicine-Section of Nutrition/Metabolism, Universitá Vita e Salute San Raffaele, Milan, Italy. perseghin.gianluca@hsr.it
Fiorina
Paolo
P
De Cobelli
Francesco
F
Scifo
Paola
P
Esposito
Antonio
A
Canu
Tamara
T
Danna
Massimo
M
Gremizzi
Chiara
C
Secchi
Antonio
A
Luzi
Livio
L
Del Maschio
Alessandro
A
D000255:Adenosine Triphosphate / Q000378:metabolism; D000368:Aged; D003430:Cross-Sectional Studies; D048909:Diabetes Complications / Q000150:complications* / Q000378:metabolism*; D003922:Diabetes Mellitus, Type 1 / Q000150:complications* / Q000378:metabolism*; D004734:Energy Metabolism; D005260:Female; D006352:Heart Ventricles / Q000378:metabolism*; D006801:Humans; D016030:Kidney Transplantation; D009682:Magnetic Resonance Spectroscopy; D008297:Male; D008875:Middle Aged; D016035:Pancreas Transplantation; D010725:Phosphocreatine / Q000378:metabolism; D010759:Phosphorus Isotopes; D014511:Uremia / Q000150:complications* / Q000378:metabolism*; D018487:Ventricular Dysfunction, Left / Q000150:complications* / Q000378:metabolism*
D010759:Phosphorus Isotopes; D010725:Phosphocreatine; D000255:Adenosine Triphosphate