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Armbrecht, H J; Boltz, M A; Hodam, T L (2002) Differences in intestinal calcium and phosphate transport between low and high bone density mice. Am J Physiol Gastrointest Liver Physiol 282:G130-6
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Armbrecht, H J; Boltz, M A; Kumar, V B (2002) Development of a vitamin D-responsive organ culture system for adult and old rat intestine. Dig Dis Sci 47:2831-8
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Armbrecht, H J (2001) The biology of aging. J Lab Clin Med 138:220-5
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Armbrecht, H J; Boltz, M A; Hodam, T L et al. (2001) Differential responsiveness of intestinal epithelial cells to 1,25-dihydroxyvitamin D3--role of protein kinase C. J Endocrinol 169:145-51
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Armbrecht, H J; Hodam, T L; Boltz, M A et al. (1999) Capacity of a low calcium diet to induce the renal vitamin D 1a-hydroxylase is decreased in adult rats. Biochem Biophys Res Commun 255:731-4
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Armbrecht, H J; Boltz, M A; Kumar, V B et al. (1999) Effect of age on calcium-dependent proteins in hippocampus of senescence-accelerated mice. Brain Res 842:287-93
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Armbrecht, H J; Boltz, M A; Kumar, V B (1999) Intestinal plasma membrane calcium pump protein and its induction by 1,25(OH)(2)D(3) decrease with age. Am J Physiol 277:G41-7
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Armbrecht, H J; Boltz, M A; Christakos, S et al. (1998) Capacity of 1,25-dihydroxyvitamin D to stimulate expression of calbindin D changes with age in the rat. Arch Biochem Biophys 352:159-64
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Armbrecht, H J; Hodam, T L; Boltz, M A et al. (1998) Induction of the vitamin D 24-hydroxylase (CYP24) by 1,25-dihydroxyvitamin D3 is regulated by parathyroid hormone in UMR106 osteoblastic cells. Endocrinology 139:3375-81
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Armbrecht, H J; Chen, M L; Hodam, T L et al. (1997) Induction of 24-hydroxylase cytochrome P450 mRNA by 1,25-dihydroxyvitamin D and phorbol esters in normal rat kidney (NRK-52E) cells. J Endocrinol 153:199-205
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