Abstract
Type I juvenile diabetes mellitus is characterized by the infiltration of activated T lymphocytes and monocytes into the islets of Langerhans of the pancreas, resulting in inflammation and progressive destruction of the insulin-producing β cells. We hypothesized that feeding nonobese diabetic (NOD) mice diets rich in polyphenols or vitamin A, both known modulators of immune function, would decrease the autoimmune inflammatory process associated with type I diabetes. NOD mice were fed a control diet (C) and diets containing either 1% freeze-dried grape powder (GP) or 250 IU vitamin A/g (VA; 0.262 μmol retinyl acetate/g) of food. Mice were considered diabetic and killed when blood glucose reached 13.9 mmol/L or greater. By ∼7 mo of age, 71% of C mice progressed to diabetes. Incidence of diabetes was reduced to 33% (P < 0.05) and 25% (P < 0.05) in mice receiving 1% dietary grape powder and VA, respectively. Splenocytes from mice receiving both GP and VA had lower TNF-α production after LPS stimulation than C mice (P < 0.05). Histological analysis of pancreatic tissue showed a significant reduction in the severity of insulitis in the mice receiving GP and VA compared with C mice. These data suggest that diets rich in polyphenols or vitamin A have protective effects against autoimmune inflammatory attack of the islet β cells and have the potential to reduce the onset and pathogenesis of autoimmune diabetes.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1216-1221 |
| Number of pages | 6 |
| Journal | Journal of Nutrition |
| Volume | 137 |
| Issue number | 5 |
| State | Published - May 2007 |
Fingerprint
ASJC Scopus subject areas
- Medicine (miscellaneous)
- Food Science
Cite this
Diets rich in polyphenols and vitamin A inhibit the development of type I autoimmune diabetes in nonobese diabetic mice. / Zunino, Susan J.; Storms, David H.; Stephensen, Charles B.
In: Journal of Nutrition, Vol. 137, No. 5, 05.2007, p. 1216-1221.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Diets rich in polyphenols and vitamin A inhibit the development of type I autoimmune diabetes in nonobese diabetic mice
AU - Zunino, Susan J.
AU - Storms, David H.
AU - Stephensen, Charles B.
PY - 2007/5
Y1 - 2007/5
N2 - Type I juvenile diabetes mellitus is characterized by the infiltration of activated T lymphocytes and monocytes into the islets of Langerhans of the pancreas, resulting in inflammation and progressive destruction of the insulin-producing β cells. We hypothesized that feeding nonobese diabetic (NOD) mice diets rich in polyphenols or vitamin A, both known modulators of immune function, would decrease the autoimmune inflammatory process associated with type I diabetes. NOD mice were fed a control diet (C) and diets containing either 1% freeze-dried grape powder (GP) or 250 IU vitamin A/g (VA; 0.262 μmol retinyl acetate/g) of food. Mice were considered diabetic and killed when blood glucose reached 13.9 mmol/L or greater. By ∼7 mo of age, 71% of C mice progressed to diabetes. Incidence of diabetes was reduced to 33% (P < 0.05) and 25% (P < 0.05) in mice receiving 1% dietary grape powder and VA, respectively. Splenocytes from mice receiving both GP and VA had lower TNF-α production after LPS stimulation than C mice (P < 0.05). Histological analysis of pancreatic tissue showed a significant reduction in the severity of insulitis in the mice receiving GP and VA compared with C mice. These data suggest that diets rich in polyphenols or vitamin A have protective effects against autoimmune inflammatory attack of the islet β cells and have the potential to reduce the onset and pathogenesis of autoimmune diabetes.
AB - Type I juvenile diabetes mellitus is characterized by the infiltration of activated T lymphocytes and monocytes into the islets of Langerhans of the pancreas, resulting in inflammation and progressive destruction of the insulin-producing β cells. We hypothesized that feeding nonobese diabetic (NOD) mice diets rich in polyphenols or vitamin A, both known modulators of immune function, would decrease the autoimmune inflammatory process associated with type I diabetes. NOD mice were fed a control diet (C) and diets containing either 1% freeze-dried grape powder (GP) or 250 IU vitamin A/g (VA; 0.262 μmol retinyl acetate/g) of food. Mice were considered diabetic and killed when blood glucose reached 13.9 mmol/L or greater. By ∼7 mo of age, 71% of C mice progressed to diabetes. Incidence of diabetes was reduced to 33% (P < 0.05) and 25% (P < 0.05) in mice receiving 1% dietary grape powder and VA, respectively. Splenocytes from mice receiving both GP and VA had lower TNF-α production after LPS stimulation than C mice (P < 0.05). Histological analysis of pancreatic tissue showed a significant reduction in the severity of insulitis in the mice receiving GP and VA compared with C mice. These data suggest that diets rich in polyphenols or vitamin A have protective effects against autoimmune inflammatory attack of the islet β cells and have the potential to reduce the onset and pathogenesis of autoimmune diabetes.
UR - http://www.scopus.com/inward/record.url?scp=34247849185&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=34247849185&partnerID=8YFLogxK
M3 - Article
C2 - 17449584
AN - SCOPUS:34247849185
VL - 137
SP - 1216
EP - 1221
JO - Journal of Nutrition
JF - Journal of Nutrition
SN - 0022-3166
IS - 5
ER -