Skeletal muscle microvascular exchange capacity is associated with hyperglycaemia in subjects with central obesity
Skeletal muscle microvascular exchange capacity is associated with hyperglycaemia in subjects with central obesity
Aims: poor glycaemic control is associated with increased risk of microvascular disease in various organs including the eye and kidney, but the relationship between glycated haemoglobin (HbA1c) and microvascular function in skeletal muscle has not been described. We tested the association between HbA1c and a measure of microvascular exchange capacity (Kf) in skeletal muscle in people with central obesity at risk of developing Type 2 diabetes.
Methods: microvascular function was measured in 28 women and 19 men [mean (± sd) age 51 ± 9 years] with central obesity who did not have diabetes. We estimated insulin sensitivity by hyperinsulinaemic–euglycaemic clamp, visceral and total fatness by magnetic resonance imaging, fitness (VO2 max by treadmill testing), physical activity energy expenditure [metabolic equivalents of tasks (METS) by use of the SenseWear Pro armband] and skeletal muscle microvascular exchange capacity (Kf) by venous occlusion plethysmography.
Results: in regression modelling, age, sex and fasting plasma glucose accounted for 30.5% of the variance in HbA1c (r2 = 0.31, P = 0.001). Adding Kf to this model explained an additional 26.5% of the variance in HbA1c (r2 = 0.57, P = 0.0001 and Kf was strongly and independently associated with HbA1c (standardized B coefficient ?0.45 (95% confidence interval ?0.19, ?0.06), P = 0.001).
Conclusions: we found a strong negative independent association between a measure of skeletal muscle microvascular exchange capacity (Kf) and HbA1c. Kf was associated with almost as much of the variance in HbA1c as fasting plasma glucose
glycated haemoglobin, insulin sensitivity, microcirculation, obesity
1112-1119
Turzyniecka, M.
b289ca34-c265-4ce0-93e5-efdb015cd24a
Wild, S.H.
eb23a87e-b8da-4f3f-8dab-e02e7b5104aa
Krentz, A.J.
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Chipperfield, A.J.
524269cd-5f30-4356-92d4-891c14c09340
Gamble, J.
cd1c0206-caae-4847-adc9-ddf7e48ac7ed
Clough, G.F.
9f19639e-a929-4976-ac35-259f9011c494
Byrne, C.D.
1370b997-cead-4229-83a7-53301ed2a43c
November 2009
Turzyniecka, M.
b289ca34-c265-4ce0-93e5-efdb015cd24a
Wild, S.H.
eb23a87e-b8da-4f3f-8dab-e02e7b5104aa
Krentz, A.J.
9f3c00da-2737-4e5f-9403-e803af2744f6
Chipperfield, A.J.
524269cd-5f30-4356-92d4-891c14c09340
Gamble, J.
cd1c0206-caae-4847-adc9-ddf7e48ac7ed
Clough, G.F.
9f19639e-a929-4976-ac35-259f9011c494
Byrne, C.D.
1370b997-cead-4229-83a7-53301ed2a43c
Turzyniecka, M., Wild, S.H., Krentz, A.J., Chipperfield, A.J., Gamble, J., Clough, G.F. and Byrne, C.D.
(2009)
Skeletal muscle microvascular exchange capacity is associated with hyperglycaemia in subjects with central obesity.
Diabetic Medicine, 26 (11), .
(doi:10.1111/j.1464-5491.2009.02822.x).
Abstract
Aims: poor glycaemic control is associated with increased risk of microvascular disease in various organs including the eye and kidney, but the relationship between glycated haemoglobin (HbA1c) and microvascular function in skeletal muscle has not been described. We tested the association between HbA1c and a measure of microvascular exchange capacity (Kf) in skeletal muscle in people with central obesity at risk of developing Type 2 diabetes.
Methods: microvascular function was measured in 28 women and 19 men [mean (± sd) age 51 ± 9 years] with central obesity who did not have diabetes. We estimated insulin sensitivity by hyperinsulinaemic–euglycaemic clamp, visceral and total fatness by magnetic resonance imaging, fitness (VO2 max by treadmill testing), physical activity energy expenditure [metabolic equivalents of tasks (METS) by use of the SenseWear Pro armband] and skeletal muscle microvascular exchange capacity (Kf) by venous occlusion plethysmography.
Results: in regression modelling, age, sex and fasting plasma glucose accounted for 30.5% of the variance in HbA1c (r2 = 0.31, P = 0.001). Adding Kf to this model explained an additional 26.5% of the variance in HbA1c (r2 = 0.57, P = 0.0001 and Kf was strongly and independently associated with HbA1c (standardized B coefficient ?0.45 (95% confidence interval ?0.19, ?0.06), P = 0.001).
Conclusions: we found a strong negative independent association between a measure of skeletal muscle microvascular exchange capacity (Kf) and HbA1c. Kf was associated with almost as much of the variance in HbA1c as fasting plasma glucose
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Published date: November 2009
Keywords:
glycated haemoglobin, insulin sensitivity, microcirculation, obesity
Organisations:
Computational Engineering and Design, Medicine
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Local EPrints ID: 71747
URI: http://eprints.soton.ac.uk/id/eprint/71747
ISSN: 0742-3071
PURE UUID: aeca3c51-1ab8-4963-9e41-832b9e0d1a77
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Date deposited: 04 Jan 2010
Last modified: 14 Mar 2024 02:47
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Author:
M. Turzyniecka
Author:
S.H. Wild
Author:
A.J. Krentz
Author:
J. Gamble
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