En enhanced proteins are associated with metabolism (77.8 ), followed by processes (11.1 ), information pathways (5.6 ) and processes pathways (5.6 ). Among the down-modulated proteins, most are also related to metabolism (46.2 ), followed by cell processes (23.0 ), transport (15.4 ), information pathways (7.7 ) and structure (7.7 ) (Table 3). Among the differentially expressed proteins in kidney of animals treated with 50 ppmF, 11 proteins are exclusively expressed in this group while 6, 6 and 8 proteins are also present in either control or 10 ppmF or both groups, respectively (Figure 1). Among the 8 proteins differentially expressed between the mice strains, regardless of the treatment with F, catalase, medium-chain specific acyl-CoA dehydrogenase and alpha-aminoadipic semialdehyde dehydrogenase were up-regulated, while Vasopressin isovaleryl-CoA dehydrogenase, ornithine aminotransferase, lactoylglutathione lyase, meprin A subunit alpha and albumin were down-regulated in the kidney of 129P3/J mice.Identification of Unique ProteinsA/J and 129P3/J mice exhibited 11 and 3 exclusive proteins, respectively. From these, 9 (64.3 ) are related to metabolism, followed 25331948 by cell processes (4 or 28.6 ) and information pathways (1 or 7.1 ). This profile was not altered upon exposure to F (Table 4).DiscussionIn the present study, we identified proteins potentially involved in renal F metabolism that are either exclusively or differentially expressed in A/J and 129P3/J mice. This highlights the molecular mechanisms underlying the differential metabolic handling of F by these two strains of mice. Exclusive proteins expressed in A/J or 129P3/J mice exhibited the same profile, regardless exposure to F. This suggests that the genetic background per se accounts for such differences between these two strains of mice. We have focused on identified proteins that may be associated with metabolic handling of F and water and renal functions. Unique metabolic proteins in kidney from A/J mice are involved in carbohydrate (probable Dlactate dehydrogenase), carbon (transaldolase), aminoacid (isobutyryl-CoA dehydrogenase, hydroxymethylglutaryl-CoA synTable 1. Expression of differentially significant kidney proteins between control A/J vs control 129P3/J mice.c aSpot n6. 91/4.71 33/5.155 36.5/5.1 38.5/7.94 42.5/8.055 50/7.2 95/6.14 32.5/8.885 38.5/5.675 58/7.37 98.7/5.6 55.9/6.0 58/5.35 57.2/5.9 51.7/5.0 36.5/6.9 38.2/6.6 43/6.3 45.8/5.7 43.2/7.3 20.7/5.25 39.2/6.2 32.7/4.8 25.3/5.8 77.2/5.9 65.9/5.53 10/255 9/133 37/365 7/293 7/825 7/85 11/187 15/635 12/535 13/853 17/775 4/188 7/206 22/992 13/374 24/517 q129(0.013) q129(0.001) q129(0.022) q129(0.009) Q129(0.022) Q129(0.049) Q129(0.041) Q129(0.000) Q129(0.024) Q129(0.033) Q129(0.001) Q129(0.029) Q129(0.044) Q129(0.041) Q129(0.020) Q129(0.022) 59.7/7.7 6/103 q129(0.032) 37.4/5.9 9/122 q129 (0.018) 32.8/5.9 14/198 q129(0.043) 18/583 q129(0.041) Q99LB7 Q99KR3 P62137 P24270 Q8R0Y6 Q9DBF1 P63038 Q5XJY5 P56480 Q9JII6 Q64442 Q9JHI5 P29758 1418741-86-2 P30275 Q9CPU0 Q60866 P14206 P70195 P28825 P07724 50/6.85 6/105 q129(0.011) O09173 43.6/7.69 15/715 q129(0.001) P45952 38.7/7.6 11/529 q129(0.012) Q9NYQ2 35.8/5.4 8/434 q129(0.011) Q9D051 Metabolism Metabolism Metabolism Metabolism Metabolism Metabolism 51.8/5.0 16/1129 q129(0.038) P56480 Metabolism 82.5/7.4 6/99 q129 (0.046) Q99KI0 MetabolismProteinMw (kDa)/pI Expt. Theor. Uniprot ID Biological ProcessbNumber of peptides/ Scoree fd Difference (P value)Aconitate hydratase, mitochondrial119/ATP synthas.En enhanced proteins are associated with metabolism (77.8 ), followed by processes (11.1 ), information pathways (5.6 ) and processes pathways (5.6 ). Among the down-modulated proteins, most are also related to metabolism (46.2 ), followed by cell processes (23.0 ), transport (15.4 ), information pathways (7.7 ) and structure (7.7 ) (Table 3). Among the differentially expressed proteins in kidney of animals treated with 50 ppmF, 11 proteins are exclusively expressed in this group while 6, 6 and 8 proteins are also present in either control or 10 ppmF or both groups, respectively (Figure 1). Among the 8 proteins differentially expressed between the mice strains, regardless of the treatment with F, catalase, medium-chain specific acyl-CoA dehydrogenase and alpha-aminoadipic semialdehyde dehydrogenase were up-regulated, while isovaleryl-CoA dehydrogenase, ornithine aminotransferase, lactoylglutathione lyase, meprin A subunit alpha and albumin were down-regulated in the kidney of 129P3/J mice.Identification of Unique ProteinsA/J and 129P3/J mice exhibited 11 and 3 exclusive proteins, respectively. From these, 9 (64.3 ) are related to metabolism, followed 25331948 by cell processes (4 or 28.6 ) and information pathways (1 or 7.1 ). This profile was not altered upon exposure to F (Table 4).DiscussionIn the present study, we identified proteins potentially involved in renal F metabolism that are either exclusively or differentially expressed in A/J and 129P3/J mice. This highlights the molecular mechanisms underlying the differential metabolic handling of F by these two strains of mice. Exclusive proteins expressed in A/J or 129P3/J mice exhibited the same profile, regardless exposure to F. This suggests that the genetic background per se accounts for such differences between these two strains of mice. We have focused on identified proteins that may be associated with metabolic handling of F and water and renal functions. Unique metabolic proteins in kidney from A/J mice are involved in carbohydrate (probable Dlactate dehydrogenase), carbon (transaldolase), aminoacid (isobutyryl-CoA dehydrogenase, hydroxymethylglutaryl-CoA synTable 1. Expression of differentially significant kidney proteins between control A/J vs control 129P3/J mice.c aSpot n6. 91/4.71 33/5.155 36.5/5.1 38.5/7.94 42.5/8.055 50/7.2 95/6.14 32.5/8.885 38.5/5.675 58/7.37 98.7/5.6 55.9/6.0 58/5.35 57.2/5.9 51.7/5.0 36.5/6.9 38.2/6.6 43/6.3 45.8/5.7 43.2/7.3 20.7/5.25 39.2/6.2 32.7/4.8 25.3/5.8 77.2/5.9 65.9/5.53 10/255 9/133 37/365 7/293 7/825 7/85 11/187 15/635 12/535 13/853 17/775 4/188 7/206 22/992 13/374 24/517 q129(0.013) q129(0.001) q129(0.022) q129(0.009) Q129(0.022) Q129(0.049) Q129(0.041) Q129(0.000) Q129(0.024) Q129(0.033) Q129(0.001) Q129(0.029) Q129(0.044) Q129(0.041) Q129(0.020) Q129(0.022) 59.7/7.7 6/103 q129(0.032) 37.4/5.9 9/122 q129 (0.018) 32.8/5.9 14/198 q129(0.043) 18/583 q129(0.041) Q99LB7 Q99KR3 P62137 P24270 Q8R0Y6 Q9DBF1 P63038 Q5XJY5 P56480 Q9JII6 Q64442 Q9JHI5 P29758 P30275 Q9CPU0 Q60866 P14206 P70195 P28825 P07724 50/6.85 6/105 q129(0.011) O09173 43.6/7.69 15/715 q129(0.001) P45952 38.7/7.6 11/529 q129(0.012) Q9NYQ2 35.8/5.4 8/434 q129(0.011) Q9D051 Metabolism Metabolism Metabolism Metabolism Metabolism Metabolism 51.8/5.0 16/1129 q129(0.038) P56480 Metabolism 82.5/7.4 6/99 q129 (0.046) Q99KI0 MetabolismProteinMw (kDa)/pI Expt. Theor. Uniprot ID Biological ProcessbNumber of peptides/ Scoree fd Difference (P value)Aconitate hydratase, mitochondrial119/ATP synthas.