Cod Liver Oil, but Not Retinoic Acid, Treatment Restores Bone Thickness in a Vitamin A-Deficient Rat

Overview

Journal Nutrients

Date 2022 Mar 12

PMID 35276845

Authors

Richard C Baybutt

Joseph T Standard

Daniel Dim

Tim Quinn

Hana Hamdan

Dingbo Lin

Kyle Kunz

Zachary S Bomstein

Benjamin J Estorge

Betty Herndon

Hamid Zia

Ahmad Mansour

Manesha Lankachandra

Agostino Molteni

Affiliations

Soon will be listed here.

Abstract

Vitamin A plays a prominent role for maintaining optimal bone status, but its impact upon the bone in response to vitamin A deficiency is not well defined. The purpose of this study was to evaluate how replenishing vitamin A by either whole food cod liver oil (COD) or the active metabolite of vitamin A, retinoic acid (RA), altered bone thickness of vitamin A-deficient (VAD) rats. Weanling rats were administered a control diet (CTRL) or VAD diet for 9 weeks. This was followed by four weeks of treatment in which the VAD group was divided into the following 4 subgroups: (1) VAD (9 weeks)-VAD (4 weeks); (2) VAD-CTRL; (3) VAD-COD; and (4) VAD-RA. Compared to controls, VAD rats had thicker bones which showed marked dysplasia. VAD-rats treated with COD produced a thinner bone that was not significantly different from that of untreated rats. In contrast, RA did not significantly change the thicker bone, and also had significantly greater periosteal and endosteal osteoblast numbers compared to VAD-COD. Active osteoclasts were not detected in VAD rats, nor during the treatment period. These findings suggest that the abnormal bone thickness in VAD rats appears to be more effectively restored to bone thickness of untreated control rats when treated with COD.

Citing Articles

Mercury Exposure from the Consumption of Dietary Supplements Containing Vegetable, Cod Liver, and Shark Liver Oils.

Brodziak-Dopierala B, Fischer A, Chrzanowska M, Ahnert B Int J Environ Res Public Health. 2023; 20(3).

PMID: 36767496 PMC: 9915034. DOI: 10.3390/ijerph20032129.

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