Male and female NOD mice differentially express peroxisome proliferator-activated receptors and pathogenic cytokines.
The peroxisome proliferator-activated receptors (PPARs) have been implicated in regulating the immune response. We determined the relative changes in the transcriptional expression of PPAR isoforms (α, γ1 and γ2) and cytokines involved in the pathogenesis of type 1 diabetes (T1D) in the immune cells of 5 weeks, 10 weeks and diabetic male non-obese diabetic (NOD) mice compared to those of female NOD mice from our previous studies, "normalized" against their respective non-obese diabetic resistant (NOR) mice controls. Overall PPARα was significantly more elevated in the macrophages of female NOD mice of all age groups whereas PPARγ, particularly the PPARγ2 isoform was more depressed in the macrophages and CD4(+) lymphocytes of female NOD mice compared to their male counterparts. The pro-inflammatory cytokines, IL-1 and TNFα, as well as the Th1 cytokines, IL-2 and IFNγ were more elevated in female NOD mice whereas the Th2 cytokine, IL-4, was more depressed in these mice compared to their male counterparts. These findings suggest that the preponderance of T1D in female NOD mice may be influenced by the more pronounced changes in the expression of PPAR isoforms and pathogenic cytokines compared to those in male NOD mice.
Yaacob
Nik Soriani
NS
School of Medical and Health Sciences, Universiti Sains Malaysia, 16150 Kubang Kerian, Kelantan, Malaysia.
Goh
Kenny Soen Keong
KS
Norazmi
Mohd Nor
MN
D000818:Animals; D016207:Cytokines / Q000235:genetics* / Q000276:immunology; D003922:Diabetes Mellitus, Type 1 / Q000235:genetics / Q000276:immunology*; D005260:Female; D017737:Macrophages, Peritoneal / Q000276:immunology; D008297:Male; D051379:Mice; D016688:Mice, Inbred NOD; D047492:Peroxisome Proliferator-Activated Receptors / Q000235:genetics* / Q000276:immunology; D020033:Protein Isoforms; D060888:Real-Time Polymerase Chain Reaction; D012727:Sex Characteristics; D013154:Spleen / Q000166:cytology / Q000276:immunology; D014158:Transcription, Genetic
D016207:Cytokines; D047492:Peroxisome Proliferator-Activated Receptors; D020033:Protein Isoforms