Abstract:
:To investigate the presence of autoantibodies against sympathetic nervous tissue and their correlation with cardiac sympathetic dysinnervation in insulin-dependent diabetes mellitus (IDDM), 20 newly diagnosed (age 26 +/- 6 years) and 48 long-term IDDM patients (age 40 +/- 13 years, duration of diabetes 22 +/- 12 years) without myocardial perfusion abnormalities (normal 99mTC-methoxyisobutylisonitrile uptake) were assessed for myocardial 123I-metaiodo benzylguanidine (123I-MIBG) uptake and complement-fixing sympathetic ganglia (CF-SG) autoantibodies. Both groups of patients were also studied for islet cell antibodies (ICA) and ECG-based cardiac autonomic neuropathy. Eighty control subjects (age 18-49 years) were investigated for CF-SG autoantibodies. Eight newly diagnosed (40%) and 12 long-term (25%) IDDM patients exhibited CF-SG autoantibodies, compared to 4 control subjects (5%; p < 0.01, p < 0.05). In long-term diabetic patients, the reduction of global but not of regional myocardial 123I-MIBG uptake correlated with CF-SG autoantibodies (r = 0.34, p = 0.02). Newly diagnosed diabetic patients did not show an association between CF-SG autoantibodies and global or regional myocardial 123I-MIBG uptake. ECG-based cardiac autonomic neuropathy (> or = two of five cardiac reflex tests abnormal) was present in 22 and absent in 26 long-term IDDM patients, of whom 9 (41%) and 3 (12%), respectively were positive for CF-SG autoantibodies (p = 0.02). Only 1 newly diagnosed IDDM patient demonstrated ECG-based cardiac autonomic neuropathy and was also positive for CF-SG autoantibodies. Although they are somewhat suggestive, results concerning autoantibodies against sympathetic nervous tissue and cardiac sympathetic dysinnervation do not strongly support the view that autoimmune mechanisms play a major role in the pathogenesis of cardiac sympathetic neuropathy in IDDM.
journal_name
Diabetologiajournal_title
Diabetologiaauthors
Schsnell O,Muhr D,Dresel S,Tatsch K,Ziegler AG,Haslbeck M,Standl Edoi
10.1007/BF00403917subject
Has Abstractpub_date
1996-08-01 00:00:00pages
970-5issue
8eissn
0012-186Xissn
1432-0428journal_volume
39pub_type
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