Journal
JOURNAL OF HISTOCHEMISTRY & CYTOCHEMISTRY
Volume 48, Issue 8, Pages 1033-1041Publisher
HISTOCHEMICAL SOC INC
DOI: 10.1177/002215540004800802
Keywords
immunohistochemistry; lymphocytes; CD3 epsilon; macrophage; F4/80; CD20; ELISA; cytokines; Sjogren's syndrome; mouse
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Funding
- NIDCR NIH HHS [DE10059, DE10335, DE12358] Funding Source: Medline
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IL-1 beta, TNF-alpha, and IL-6 have been implicated in the destruction of parotid gland acinar cells (but not duct cells) in autoimmune sialoadenitis. Here we report the temporal alterations of these cytokines in parotid acinar cells that may lead to this specificity in cell death in the non-obese diabetic (NOD) mouse model for Sjogren's syndrome. Immunohistochemistry on paraffin sections of parotid gland from 5- and 10-week-old BALB/c and NOD mice confirmed the presence of many peri-acinar lymphoid nodules but few T-cells and macrophages between acinar cells. RT-PCR on enzymatically dispersed mouse parotid acinar cells (MPACs) showed no bands for CD3 epsilon, CD20, or F4/80 regardless of mouse strain or age. By ELISA, MPACs from 10-week-old NODs showed a small but highly significant (p<0.003) increase in IL-1 beta and a large significant decrease (p<0.008) in IL-6 compared to 5-week-old NODs. Norepinephrine-stimulated amylase release from MPACs was not different regardless of mouse strain or age. These data show that alterations in acinar cell production of IL-1 beta and IL-6 in aging NODs precede periductal lymphoid aggregates and acinar cell secretory dysfunction.
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