title: Residual insulin production, glycaemic control and prevalence of microvascular lesions and polyneuropathy in long-term type 1 (insulin-dependent) diabetes mellitus.
abstract: The aim of the present study was to evaluate the role of residual insulin production in long-term Type 1 (insulin-dependent) diabetes mellitus. Ninety-seven patients with a disease duration of 9-16 years and onset before the age of 30 years were studied. C-peptide excretion in 24-h urine samples was measured as an indicator of residual insulin production. Thirty-five patients (36%) excreted C-peptide (greater than or equal to 0.2 nmol); as many as possible of them were carefully matched with a non-excretor patient with regard to age at onset of diabetes and disease duration. Twenty-nine pairs were obtained, and 22 of them agreed to participate in further investigations of glycaemic control and microangiopathic lesions. The patients who excreted C-peptide had significantly lower HbA1c than the non-excretor group, 6.9 +/- 0.3% vs 7.9 +/- 0.3%, (p less than 0.025). Moderate-to-advanced background retinopathy was found in 2 patients in the excretor group and in 7 patients in the non-excretor group. Microalbuminuria [ratio of albumin: creatinine (mg/l:mmol/l) greater than or equal to 5] was found in 1 and in 5 patients, respectively, while proteinuria [ratio of protein: creatinine (mg/l:mmol/l X 10) greater than or equal to 136] was found in 0 and in 4 patients, respectively. Microalbuminuria and/or proteinuria was found in 7 of the non-excretor group as compared to 1 in the excretor group (p = 0.046).(ABSTRACT TRUNCATED AT 250 WORDS)
authors.forename: S
authors.initials: S
authors.lastname: Sjöberg
authors.forename: R
authors.initials: R
authors.lastname: Gunnarsson
authors.forename: M
authors.initials: M
authors.lastname: Gjötterberg
authors.forename: A K
authors.initials: AK
authors.lastname: Lefvert
authors.forename: A
authors.initials: A
authors.lastname: Persson
authors.forename: J
authors.initials: J
authors.lastname: Ostman
mesh_terms: D000293:Adolescent; D000328:Adult; D000419:Albuminuria / Q000209:etiology; D001794:Blood Pressure; D002096:C-Peptide / Q000378:metabolism; D003922:Diabetes Mellitus, Type 1 / Q000150:complications / Q000378:metabolism*; D003928:Diabetic Nephropathies / Q000378:metabolism; D003929:Diabetic Neuropathies / Q000378:metabolism; D003930:Diabetic Retinopathy / Q000378:metabolism; D005260:Female; D006442:Glycated Hemoglobin / Q000032:analysis; D006801:Humans; D007328:Insulin / Q000378:metabolism*; D000078790:Insulin Secretion; D008297:Male; D011507:Proteinuria / Q000209:etiology; D001613:beta 2-Microglobulin / Q000378:metabolism
chemical_list: D002096:C-Peptide; D006442:Glycated Hemoglobin; D007328:Insulin; D001613:beta 2-Microglobulin