Figure 5.

Dietary l-Lys suppresses plasma iPTH level in adenine rats. (A) The plasma iPTH level is determined by ELISA. Compared with group LP, groups Ade and Gly have elevated plasma iPTH. l-Lys supplementation strongly suppresses plasma iPTH. Results are presented as means±SD (n=10 in each group). (B) Maximum cross-sectional area of the parathyroid glands is assessed using hematoxylin and eosin–stained sections. Results are presented as means±SD (n=5–13 in each group). (C) Representative hematoxylin and eosin–stained micrographs of parathyroid glands from group LP (a), group Ade (b), group Gly (c), and group Lys (d) are shown. *P<0.05; ***P<0.001 (Dunnett’s test). Scale bar, 100 μm.