Antibodies to GAD and glycemic control in recent-onset IDDM
Antibodies to GAD and glycemic control in recent-onset IDDM. R D Hoeldtke , K D Bryner , G G Horvath , M R Byerly , G R Hobbs , S M Marcovina and A Lernmark Department of Medicine, West Virginia University, Morgantown 26506-9159, USA. bmusick@wvudeptmed1.hsc.wvu.edu Abstract OBJECTIVE: To analyze th...
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Published in | Diabetes care Vol. 20; no. 12; pp. 1900 - 1903 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
Alexandria, VA
American Diabetes Association
01.12.1997
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Subjects | |
Online Access | Get full text |
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Summary: | Antibodies to GAD and glycemic control in recent-onset IDDM.
R D Hoeldtke ,
K D Bryner ,
G G Horvath ,
M R Byerly ,
G R Hobbs ,
S M Marcovina and
A Lernmark
Department of Medicine, West Virginia University, Morgantown 26506-9159, USA. bmusick@wvudeptmed1.hsc.wvu.edu
Abstract
OBJECTIVE: To analyze the effect of antibodies to glutamic acid decarboxylase (GAD65Ab) and islet cells (ICA512Ab) on glycemic
control early in IDDM. RESEARCH DESIGN AND METHODS: GAD65Ab and ICA512Ab were measured twice in 35 patients (10 male, 25 female;
age 10-40 years) initially within 2 years of diagnosis and again 1 year later. The glycosylated hemoglobin was measured one
to four times each year, and the average glycosylated hemoglobin for the preceding year was calculated each time the antibodies
were measured. RESULTS: The mean HbA1 at the time of the initial evaluation was 8.04 +/- 0.30 (reference range 4.7-7.3% for
nondiabetic patients), the average GAD65Ab index was 0.735 +/- 0.306, and the mean ICA512Ab index was 1.94 +/- 0.65. The GAD65Ab
index correlated with HbA1 (r = 0.41, P < 0.025), whereas the ICA512Ab index did not (r = 0.13). One year later, the mean
GAD65Ab index was 0.94 +/- 0.34, the mean ICA512Ab index was 1.04 +/- 0.40, and the mean HbA1 was 9.03 +/- 0.30. The GAD65Ab
index correlated with HbA1 (r = 0.61 P < 0.001), whereas the ICA512Ab index did not (r = -0.06). Stratification of patients
into tertiles according to the average GAD65 index revealed, at the follow-up evaluation, that the better glycemic control
in the lowest GAD65Ab tertile was accomplished with significantly less insulin (0.43 +/- 0.08 U/kg for the lowest tertile
vs. 0.71 +/- 0.09 and 0.64 +/- 0.09 for the middle and highest tertiles, respectively; P < 0.05). CONCLUSIONS: In summary,
patients with IDDM and low GAD65Ab have better glycemic control even though they require less insulin. The ICA512Ab index,
however, fails to correlate with glycemia. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0149-5992 1935-5548 |
DOI: | 10.2337/diacare.20.12.1900 |