A Natural, Calcium-Rich Marine Multi-mineral Complex Preserves Bone Structure, Composition and Strength in an Ovariectomised Rat Model of Osteoporosis
- 252 Downloads
Calcium supplements are used as an aid in the prevention of osteopenia and osteoporosis and also for the treatment of patients when used along with medication. Many of these supplements are calcium carbonate based. This study compared a calcium-rich, marine multi-mineral complex (Aquamin) to calcium carbonate in an ovariectomised rat model of osteoporosis in order to assess Aquamin’s efficacy in preventing the onset of bone loss. Animals were randomly assigned to either non-ovariectomy control (Control), ovariectomy (OVX) plus calcium carbonate, ovariectomy plus Aquamin or ovariectomy plus Aquamin delay where Aquamin treatment started 8 weeks post OVX. At the end of the 20-week study, the trabecular architecture was measured using micro computed tomography, bone composition was assessed using Fourier transform infrared spectroscopy and the mechanical properties were assessed using nanoindentation and three-point bend testing. The study demonstrates that oral ingestion of Aquamin results in less deterioration of trabecular bone structure, mineral composition and tissue level biomechanical properties in the tibia of rats following ovariectomy than calcium carbonate. This study has shown that in an animal model of osteoporosis, Aquamin is superior to calcium carbonate at slowing down the onset of bone loss.
KeywordsOsteoporosis Bone Bone strength Bone composition Calcium Animal model
We thank Marigot Ltd (Cork, Ireland) as the source of the mineral-rich algae extract and for funding this study. We thank Mr. Peter O’Reilly, Senior Experimental Officer in Mechanical and Manufacturing Engineering, Trinity College Dublin for assistance with micro computed tomography, nanoindentation and three-point bend testing.
Orlaith Brennan, Denise O’Gorman and Fergal O’Brien were responsible for the study design. Orlaith Brennan prepared the first draft of the paper. Orlaith Brennan, Joseph Sweeney, Brian O’Meara, Amro Widaa, Franck Bonnier and Hugh Byrne all contributed to the experimental work. Orlaith Brennan and Joseph Sweeney were responsible for statistical analysis of the data. All authors revised the paper critically for intellectual content and approved the final version. All authors agree to be accountable for the work and to ensure that any questions relating to the accuracy and integrity of the paper are investigated and properly resolved.
Compliance with Ethical Standards
Conflicts of interest
Dr. O’Gorman is an employee of Marigot Ltd. Prof O’Brien and Dr. Brennan have received funding from Marigot Ltd. to conduct research. Prof Byrne, Dr. Bonnier, Dr. Widaa, Mr. Sweeney and Mr. O’Meara have no disclosures.
Human and Animal Rights and Informed Consent
All applicable international, national and institutional guidelines for the care and use of animals were followed. All procedures performed in studies involving animals were in accordance with the ethical standards of the institution or practice at which the studies were conducted.
- 6.Institute of Medicine (2011) Dietary reference intakes for calcium and vitamin D. In: Ross AC, Taylor CL, Yaktine AL, Del Valle HB (eds). National Academies Press, Washington DCGoogle Scholar
- 11.Brennan O, Stenson B, Widaa A, O’Gorman DM, O’Brien FJ (2015) Incorporation of the natural marine multi-mineral dietary supplement Aquamin enhances osteogenesis and improves the mechanical properties of a collagen-based bone graft substitute. J Mech Behav Biomed Mater 47:114–123CrossRefPubMedGoogle Scholar
- 14.Aslam MN, Kreider JM, Paruchuri T, Bhagavathula N, DaSilva M, Zernicke RF, Goldstein SA, Varani J (2010) A mineral-rich extract from the red marine algae Lithothamnion calcareum preserves bone structure and function in female mice on a Western-style diet. Calcif Tiss Int 86(4):313–324CrossRefGoogle Scholar
- 30.Cummings SR, Cosman F, Jamal SA (2002) Osteoporosis: an evidence-based guide to prevention and management. American College of Physicians, PhiladelphiaGoogle Scholar