Publication: Pre-suckling calcium supplementation effectively prevents lactation-induced osteopenia in rats
Issued Date
2014-01-15
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ISSN
15221555
01931849
01931849
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2-s2.0-84892579843
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Mahidol University
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SCOPUS
Bibliographic Citation
American Journal of Physiology - Endocrinology and Metabolism. Vol.306, No.2 (2014)
Suggested Citation
Panan Suntornsaratoon, Kamonshanok Kraidith, Jarinthorn Teerapornpuntakit, Nitita Dorkkam, Kannikar Wongdee, Nateetip Krishnamra, Narattaphol Charoenphandhu Pre-suckling calcium supplementation effectively prevents lactation-induced osteopenia in rats. American Journal of Physiology - Endocrinology and Metabolism. Vol.306, No.2 (2014). doi:10.1152/ajpendo.00556.2013 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/33315
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Title
Pre-suckling calcium supplementation effectively prevents lactation-induced osteopenia in rats
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Abstract
During lactation, osteoclast-mediated bone resorption and intestinal calcium hyperabsorption help provide extra calcium for lactogenesis. Since the suckling-induced surge of pituitary prolactin (PRL) rapidly stimulates calcium absorption in lactating rats, it is hypothesized that pre-suckling oral calcium supplementation should be an efficient regimen to shift the calcium source from bone to diet, thereby slowing lactation-induced osteopenia. Our results showed that 30-min suckling markedly stimulated maternal duodenal calcium transport, which returned to the baseline at 45 min. Lactating rats given 4 mg/kg per dose calcium via a gavage tube at 90 min pre-suckling 4 doses a day for 14 days prevented a decrease in bone mineral density (BMD) of long bones and vertebrae. On the other hand, a single-dose supplementation, despite the same amount of calcium per day, appeared less effective. Because glucose and galactose further stimulated duodenal calcium transport in lactating rats, pre-suckling calcium supplement containing both sugars successfully normalized plasma ionized calcium and led to better bone gain than that with calcium alone. A histomorphometric study revealed that lactating rats given pre-suckling calcium plus monosaccharide supplement manifested greater trabecular bone volume and thickness and exhibited less eroded surface than in vehicle-treated lactating rats. Beneficial effects of the 14-day calcium supplementation persisted until 6 mo postweaning in dams and also elevated the baseline BMD of the offspring. In conclusion, our proof-of-concept study has corroborated that pre-suckling calcium supplements, especially regimens containing monosaccharides, are efficient in preventing osteopenia in lactating rats and could increase bone density in both breastfeeding mothers and neonates. © 2014 the American Physiological Society.