Effects of Repeated Intramammary 25(OH)D3 in LPS-Challenged QuartersExpression of CYP27B1 in total milk somatic cells remained elevated (P < 0.05) in LIPO and LIPO+25D quarters compared with control quarters until 24 h postchallenge, whereas VDR expression was not greater in LIPO and LIPO+25D quarters compared with control quarters from 24 to 72 h (Figure 6). Expression of CYP24A1 in milk somatic cells did not differ between LIPO and control quarters from 12 to 72 h postchallenge, but it was greater (P < 0.01) in somatic cells of LIPO+25D quarters than in somatic cells of control or LIPO quarters (Figure 6). Expression of iNOS in somatic cells from LIPO and LIPO+25D quarters remained elevated (P < 0.05) at 24 and 36 h compared with the control but did not differ between LIPO and LIPO+25D quarters (Figure 6). The β-defensins, CCL5, IL1B, and IL8 genes were not elevated in LIPO or LIPO+25D quarters compared with control quarters from 24 to 72 h postchallenge, and none of the genes differed in 25D quarters compared with control quarters from 24 to 72 h (data not shown).