Variation in serum 25-Hydroxyvitamin D in free-ranging New-World tropical bats

• Autorzy: Southworth L.O. , Holick M. F. , Chen T.-C. , Kunz T. H.
• Języki publikacji: EN

Abstrakty

EN

Vitamin D (represented by D2 or D3) is considered essential for normal calcium homeostasis. It is either synthesized in the skin following ultraviolet-B irradiation of provitamin D3 (7-dehydrocholesterol), or ingested in the diet as vitamin D2 or vitamin D3. Most neotropical bats are nocturnal, roost in dark places, and consume diets that lack vitamin D and thus have no other known source of this important nutrient. A few species, namely fish-eating (piscivores) and blood-eating (sanguivores), however, have the potential to ingest large quantities of dietary vitamin D. In this study, blood serum collected from five nocturnal, neotropical bats (including three plant-visiting species, one fish-eating species and one blood-eating species), was analyzed using a competitive protein binding assay (CPBA) to determine concentrations of 25-hydroxyvitamin D [25(OH)D], the major circulating vitamin D metabolite. Cave-roosting (absence of sunlight), plant-visiting species (Artibeus jamaicensis, Brachyphylla cavernarum, and Monophyllus redmani) had a mean serum concentration of 25(OH)D between 7-15 ng/ml, values that are less than sufficient for humans. By contrast, cave-roosting, sanguivorous Desmodus rotundus and piscivorous Noctilio leporinus, species which have access to dietary vitamin D, had a mean serum concentration of 25(OH)D between 236-247 ng/ml, with high values to 400 ng/ml, the highest recorded for any vertebrate taxon. These findings support the hypothesis that circulating 25(OH)D concentrations in bats are strongly influenced by dietary habits.

• Wydawca: -
• Czasopismo: Acta Chiropterologica
• Rocznik: 2009
• Tom: 11
• Numer: 2
• Opis fizyczny: p.451-456,fig.,ref.

Twórcy

autor

Southworth L.O.

• Center for Ecology and Conservation Biology, Department of Biology, Boston University, Boston, MA 02215, USA

autor

Holick M. F.

• Section of Endocrinology, Diabetes, and Nutrition, Department of Medicine, Boston University School of Medicine, Boston, MA 02118, USA

autor

Chen T.-C.

• Section of Endocrinology, Diabetes, and Nutrition, Department of Medicine, Boston University School of Medicine, Boston, MA 02118, USA

autor

Kunz T. H.

• Center for Ecology and Conservation Biology, Department of Biology, Boston University, Boston, MA 02215, USA

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Identyfikatory

DOI

10.3161/150811009X485675