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. 1992;28(4):263-270.
doi: 10.1002/ajp.1350280404.

Influence of ultraviolet B radiation on vitamin D3 metabolism in vitamin D3-resistant New World primates

Mercedes A Gacad  1 , Mark W Deseran  2 , John S Adams  1
Affiliations

Influence of ultraviolet B radiation on vitamin D3 metabolism in vitamin D3-resistant New World primates

Mercedes A Gacad et al. Am J Primatol. 1992.

Abstract

We investigated the occurrence of rickets in adolescent tamarins (Saguinus imperator) residing at the Los Angeles Zoo. Compared to tamarins in the same colony without clinical evidence of bone disease (N = 6), rachitic platyrrhines (N = 3) had a decrease in their serum calcium concentration (P < .05). The affected tamarins also had lower serum 1,25-dihydroxyvitamin D3 (1,25-(OH)2D3) levels than did nonaffected colony mates, but 2-10-fold higher concentrations than in Old World primates of a comparable developmental stage. New World primates in many different genera are known to exhibit target organ resistance to the active vitamin D3 metabolite, 1,25-(OH)2D3, compensated by maintenance of high circulating concentrations of 1,25-(OH)2D3. The relatively low serum 1,25-(OH)2D3 concentration in rachitic tamarins and ultraviolet B radiation deficient environment of these primates suggested that bone disease may be linked to a deficiency in substrate for 1,25-(OH)2D3, 25 hydroxyvtamin D3 (25-OHD3). Chronic exposure of platyrrhines in three different vitamin D resistant genera to an artificial UVB source resulted in 1) a significant increase in the mean serum 25-OHD3 (P < .001) and 1,25-(OH)2D3 (P < .02) level over that encountered in platyrrhines not exposed to UVB; and 2) prevention of rachitic bone disease in irradiated individuals. These data further show that the serum 25-OHD3 and 1,25-OH2D3 levels are positively correlated in vitamin D-resistant platyrrhines (r = 0.64; P= .0014) and suggest that a compromise in cutaneous vitamin D3 production by means of UVB deprivation may limit necessary 1,25-(OH)2D3 production. © 1992 Wiley-Liss, Inc.

Keywords: calcifediol; calcitriol; primates; vitamin D.

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References

    1. Adams, J. S.; Clemens, T. L.; Holick, N. F., Silica Sep‐Pak preparative chromatography for vitamin D and its metabolites. Journal of Chromatography 226:198–201, 1981a.
    1. Adams, J. S.; Clemens, T. L.; Parrish, J. A.; Holick, M. F., Vitamin‐D synthesis and metabolism after ultraviolet irradiation of normal and vitamin‐D‐deficient subjects. New England Journal of Medicine 306:722–725, 1981b.
    1. Adams, J. S.; Gacad, M. A.; Baker, A. J.; Gonzales, B.; Rude, R. K., Serum concentrations of 1,25‐dihydroxyvitamin D3 in Platyrrhini and Catarrhini: A phylogenetic appraisal. American Journal of Primatology 9:219–224, 1985a.
    1. Adams, J. S.; Gacad, M. A.; Baker, A. J.; Keuhn, G.; Rude, R. K., Diminished internalization and action of 1,25‐dihydroxyvitamin D3 in dermal fibroblasts cultured from New World primates. Endocrinology 116:2523–2527, 1985b.
    1. Adams, J. S.; Gacad, M. A.; Rude, R. K.; Deseran, M.; Endres, D. B.; Mallette, L. E., Immunoreactive parathyroid hormone levels in platyrrhini and catarrhini: A comparative analysis with three different assays. American Journal of Primatology 13:425–433, 1987.

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