The inflammation, vascular repair and injury responses to exercise in fit males with and without Type 1 diabetes: an observational study

West, Daniel J, Campbell, Matthew, Gonzalez, Javier T, Walker, Mark, Stevenson, Emma J, Ahmed, Fahad W, Wijaya, Stephanie, Shaw, James A and Weaver, Jolanta U (2015) The inflammation, vascular repair and injury responses to exercise in fit males with and without Type 1 diabetes: an observational study. Cardiovascular Diabetology, 14 (1). ISSN 1475-2840

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Abstract

Background
Type 1 diabetes is associated with raised inflammation, impaired endothelial progenitor cell mobilisation and increased markers of vascular injury. Both acute and chronic exercise is known to influence these markers in non-diabetic controls, but limited data exists in Type 1 diabetes. We assessed inflammation, vascular repair and injury at rest and after exercise in physically-fit males with and without Type 1 diabetes.

Methods
Ten well-controlled type 1 diabetes (27 ± 2 years; BMI 24 ± 0.7 kg.m2; HbA1c 53.3 ± 2.4 mmol/mol) and nine non-diabetic control males (27 ± 1 years; BMI 23 ± 0.8 kg.m2) matched for age, BMI and fitness completed 45-min of running. Venous blood samples were collected 60-min before and 60-min after exercise, and again on the following morning. Blood samples were processed for TNF-α using ELISA, and circulating endothelial progenitor cells (cEPCs; CD45dimCD34+VEGFR2+) and endothelial cells (cECs; CD45dimCD133-CD34+CD144+) counts using flow-cytometry.

Results
TNF-α concentrations were 4-fold higher at all-time points in Type 1 diabetes, when compared with control (P < 0.001). Resting cEPCs were similar between groups; after exercise there was a significant increase in controls (P = 0.016), but not in Type 1 diabetes (P = 0.202). CEPCs peaked the morning after exercise, with a greater change in controls vs. Type 1 diabetes (+139 % vs. 27 %; P = 0.01). CECs did not change with exercise and were similar between groups at all points (P > 0.05). Within the Type 1 diabetes group, the delta change in cEPCS from rest to the following morning was related to HbA1c (r = -0.65, P = 0.021) and TNF-α (r = -0.766, P = 0.005).

Conclusions
Resting cEPCs and cECs in Type 1 diabetes patients with excellent HbA1c and high physical-fitness are comparable to healthy controls, despite eliciting 4-fold greater TNF-α. Furthermore, Type 1 diabetes patients appear to have a blunted post-exercise cEPCs response (vascular repair), whilst a biomarker of vascular injury (cECs) remained comparable to healthy controls.

Item Type: Article
Divisions: Faculty of Health Sciences and Wellbeing > School of Nursing and Health Sciences
Depositing User: Leah Maughan
Date Deposited: 28 Jan 2021 14:30
Last Modified: 28 Jan 2021 14:45
URI: http://sure.sunderland.ac.uk/id/eprint/13025
ORCID for Matthew Campbell: ORCID iD orcid.org/0000-0001-5883-5041

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