Benefits of omega 3 for Type I Diabetes



http://jama.ama-assn.org/cgi/content/abstract/298/12/1420 says
Omega-3 Polyunsaturated Fatty Acid Intake and Islet Autoimmunity in
Children at Increased Risk for Type 1 Diabetes
Jill M. Norris, MPH, PhD; Xiang Yin, MD, MS; Molly M. Lamb, BA;
Katherine Barriga, MSPH; Jennifer Seifert, BS; Michelle Hoffman, RN;
Heather D. Orton, MS; Anna E. Barón, PhD; Michael Clare-Salzler, MD;
H. Peter Chase, MD; Nancy J. Szabo, PhD; Henry Erlich, MD, PhD; George
S. Eisenbarth, MD, PhD; Marian Rewers, MD, PhD

JAMA. 2007;298:1420-1428.

Context Cod liver oil supplements in infancy have been associated
with a decreased risk of type 1 diabetes mellitus in a retrospective
study.

Objective To examine whether intakes of omega-3 and omega-6 fatty
acids are associated with the development of islet autoimmunity (IA)
in children.

Design, Setting, and Participants A longitudinal, observational
study, the Diabetes Autoimmunity Study in the Young (DAISY), conducted
in Denver, Colorado, between January 1994 and November 2006, of 1770
children at increased risk for type 1 diabetes, defined as either
possession of a high diabetes risk HLA genotype or having a sibling or
parent with type 1 diabetes. The mean age at follow-up was 6.2 years.
Islet autoimmunity was assessed in association with reported dietary
intake of polyunsaturated fatty acids starting at age 1 year. A case-
cohort study (N = 244) was also conducted in which risk of IA by
polyunsaturated fatty acid content of erythrocyte membranes (as a
percentage of total lipids) was examined.

Main Outcome Measure Risk of IA, defined as being positive for
insulin, glutamic acid decarboxylase, or insulinoma-associated
antigen-2 autoantibodies on 2 consecutive visits and still
autoantibody positive or having diabetes at last follow-up visit.

Results Fifty-eight children developed IA. Adjusting for HLA
genotype, family history of type 1 diabetes, caloric intake, and
omega-6 fatty acid intake, omega-3 fatty acid intake was inversely
associated with risk of IA (hazard ratio [HR], 0.45; 95% confidence
interval [CI], 0.21-0.96; P = .04). The association was strengthened
when the definition of the outcome was limited to those positive for 2
or more autoantibodies (HR, 0.23; 95% CI, 0.09-0.58; P = .002). In the
case-cohort study, omega-3 fatty acid content of erythrocyte membranes
was also inversely associated with IA risk (HR, 0.63; 95% CI,
0.41-0.96; P = .03).

Conclusion Dietary intake of omega-3 fatty acids is associated with
reduced risk of IA in children at increased genetic risk for type 1
diabetes.

--
Ron

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