Abstract
OBJECTIVE: Recent studies have demonstrated that C-peptide exerts beneficial effects on the diabetic state, including improvements in kidney and nerve function. Thus, we investigated the effect of residual pancreatic C-peptide secretion on the cardiac autonomic nervous system in well- and poorly controlled type II diabetic patients. DESIGN: Randomised cross-sectional study. PATIENTS: Forty type II diabetic patients free from diabetic neuropathy, with similar anthropometric parameters, volunteered for our study. MEASUREMENTS: Insulin action, residual pancreatic C-peptide secretion and the cardiac autonomic nervous system were investigated by euglycaemic hyperinsuli-naemic clamp, glucagon bolus test and heart rate variability, respectively. M-values were used as an index of insulin sensitivity. High frequency (HF) and low frequency (LF) oscillations in heart rate were analysed. RESULTS: The patients were categorized into those with good (HbA1c ≤ 7.0) and poor (HbA1c ≥ 8.0) metabolic control. The patients with good metabolic control had fasting plasma glucose and C-peptide levels, plasma area under the curve (AUC) insulin and C-peptide levels, M-values, LF values and LF/HF ratio significantly lower than patients with poor metabolic control. In contrast, RR interval, total power and HF values had an opposite trend. Basal plasma C-peptide correlated with LF/HF in patients with good (r = -0.42; P <0.05) and poor metabolic control (r = -0.45; P <0.05). An even stronger correlation between AUC C-peptide and LF/HF in patients with good (r = -0.53, P <0.002) and poor metabolic control (r = -0.49; P <0.03), as well as in the whole group (r = -0.83; P <0.001) was found. By multiple regression analyses performed in all patients, LF/HF were independently associated with AUC C-peptide (t = -8.618; P <0.001) but not basal C-peptide levels (t = -0.137; P <0.88). CONCLUSION: Our study demonstrated that preserved C-peptide secretion is associated with a well balanced cardiac autonomic activity in type II diabetic patients.
| Original language | English |
|---|---|
| Pages (from-to) | 259-264 |
| Number of pages | 6 |
| Journal | Clinical Endocrinology |
| Volume | 57 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2002 |
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ASJC Scopus subject areas
- Endocrinology
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Relationship between autonomic cardiac activity, β-cell function, anthropometrics and metabolic indices in type II diabetics. / Manzella, Daniela; Carbonella, Marco; Ragno, Emilia; Passariello, Nicola; Grella, Rodolfo; Paolisso, Giuseppe.
In: Clinical Endocrinology, Vol. 57, No. 2, 2002, p. 259-264.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Relationship between autonomic cardiac activity, β-cell function, anthropometrics and metabolic indices in type II diabetics
AU - Manzella, Daniela
AU - Carbonella, Marco
AU - Ragno, Emilia
AU - Passariello, Nicola
AU - Grella, Rodolfo
AU - Paolisso, Giuseppe
PY - 2002
Y1 - 2002
N2 - OBJECTIVE: Recent studies have demonstrated that C-peptide exerts beneficial effects on the diabetic state, including improvements in kidney and nerve function. Thus, we investigated the effect of residual pancreatic C-peptide secretion on the cardiac autonomic nervous system in well- and poorly controlled type II diabetic patients. DESIGN: Randomised cross-sectional study. PATIENTS: Forty type II diabetic patients free from diabetic neuropathy, with similar anthropometric parameters, volunteered for our study. MEASUREMENTS: Insulin action, residual pancreatic C-peptide secretion and the cardiac autonomic nervous system were investigated by euglycaemic hyperinsuli-naemic clamp, glucagon bolus test and heart rate variability, respectively. M-values were used as an index of insulin sensitivity. High frequency (HF) and low frequency (LF) oscillations in heart rate were analysed. RESULTS: The patients were categorized into those with good (HbA1c ≤ 7.0) and poor (HbA1c ≥ 8.0) metabolic control. The patients with good metabolic control had fasting plasma glucose and C-peptide levels, plasma area under the curve (AUC) insulin and C-peptide levels, M-values, LF values and LF/HF ratio significantly lower than patients with poor metabolic control. In contrast, RR interval, total power and HF values had an opposite trend. Basal plasma C-peptide correlated with LF/HF in patients with good (r = -0.42; P <0.05) and poor metabolic control (r = -0.45; P <0.05). An even stronger correlation between AUC C-peptide and LF/HF in patients with good (r = -0.53, P <0.002) and poor metabolic control (r = -0.49; P <0.03), as well as in the whole group (r = -0.83; P <0.001) was found. By multiple regression analyses performed in all patients, LF/HF were independently associated with AUC C-peptide (t = -8.618; P <0.001) but not basal C-peptide levels (t = -0.137; P <0.88). CONCLUSION: Our study demonstrated that preserved C-peptide secretion is associated with a well balanced cardiac autonomic activity in type II diabetic patients.
AB - OBJECTIVE: Recent studies have demonstrated that C-peptide exerts beneficial effects on the diabetic state, including improvements in kidney and nerve function. Thus, we investigated the effect of residual pancreatic C-peptide secretion on the cardiac autonomic nervous system in well- and poorly controlled type II diabetic patients. DESIGN: Randomised cross-sectional study. PATIENTS: Forty type II diabetic patients free from diabetic neuropathy, with similar anthropometric parameters, volunteered for our study. MEASUREMENTS: Insulin action, residual pancreatic C-peptide secretion and the cardiac autonomic nervous system were investigated by euglycaemic hyperinsuli-naemic clamp, glucagon bolus test and heart rate variability, respectively. M-values were used as an index of insulin sensitivity. High frequency (HF) and low frequency (LF) oscillations in heart rate were analysed. RESULTS: The patients were categorized into those with good (HbA1c ≤ 7.0) and poor (HbA1c ≥ 8.0) metabolic control. The patients with good metabolic control had fasting plasma glucose and C-peptide levels, plasma area under the curve (AUC) insulin and C-peptide levels, M-values, LF values and LF/HF ratio significantly lower than patients with poor metabolic control. In contrast, RR interval, total power and HF values had an opposite trend. Basal plasma C-peptide correlated with LF/HF in patients with good (r = -0.42; P <0.05) and poor metabolic control (r = -0.45; P <0.05). An even stronger correlation between AUC C-peptide and LF/HF in patients with good (r = -0.53, P <0.002) and poor metabolic control (r = -0.49; P <0.03), as well as in the whole group (r = -0.83; P <0.001) was found. By multiple regression analyses performed in all patients, LF/HF were independently associated with AUC C-peptide (t = -8.618; P <0.001) but not basal C-peptide levels (t = -0.137; P <0.88). CONCLUSION: Our study demonstrated that preserved C-peptide secretion is associated with a well balanced cardiac autonomic activity in type II diabetic patients.
UR - http://www.scopus.com/inward/record.url?scp=0036372339&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0036372339&partnerID=8YFLogxK
U2 - 10.1046/j.1365-2265.2002.01596.x
DO - 10.1046/j.1365-2265.2002.01596.x
M3 - Article
C2 - 12153606
AN - SCOPUS:0036372339
VL - 57
SP - 259
EP - 264
JO - Clinical Endocrinology
JF - Clinical Endocrinology
SN - 0300-0664
IS - 2
ER -