Effect of marine collagen peptides on long bone development in growing rats.
BACKGROUND
Nutritional factors play an important role in skeletal development during growth. However, the absorption rates of many bone-related minerals are relatively low from traditional diets, especially for people in Asia and Africa. In the present study, the effect of marine collagen peptides (MCP) derived from chum salmon (Oncorhynchus keta) skin on the development of femurs in growing rats of both sexes was investigated.


RESULTS
MCP supplementation could increase the size, mineral density, dry weight, ash weight, content of most minerals and both stiffness and toughness of femurs in male growing rats. However, such effects were milder in female rats. The reported increase in mineral density was likely to be related to increased osteoblast activity rather than a decreased rate of bone resorption, as an increase in serum osteocalcin and bone-specific alkaline phosphatase content was observed, but no significant difference in serum N-terminal telopeptide of type I collagen compared with control was found.


CONCLUSIONS
MCP supplementation could promote the development of long bones in growing male rats.
Xu
YaJun
Y
Department of Nutrition and Food Hygiene, School of Public Health, Peking University Health Science Center, Beijing, China.
Han
XiaoLong
X
Li
Yong
Y
D000469:Alkaline Phosphatase / Q000378:metabolism; D000818:Animals; D015519:Bone Density; D001846:Bone Development; D001842:Bone and Bones / Q000737:chemistry* / Q000201:enzymology*; D003094:Collagen / Q000008:administration & dosage* / Q000737:chemistry; D019245:Compressive Strength; D004044:Dietary Proteins / Q000008:administration & dosage*; D005260:Female; D005269:Femur / Q000737:chemistry / Q000254:growth & development; D029941:Fish Proteins / Q000008:administration & dosage* / Q000737:chemistry; D008297:Male; D017685:Oncorhynchus keta; D015675:Osteocalcin / Q000097:blood; D010024:Osteoporosis / Q000517:prevention & control; D010446:Peptide Fragments / Q000008:administration & dosage* / Q000737:chemistry; D010748:Phosphopeptides / Q000097:blood; D011347:Procollagen / Q000097:blood; D011897:Random Allocation; D051381:Rats; D017207:Rats, Sprague-Dawley; D012727:Sex Characteristics; D012867:Skin / Q000737:chemistry
D004044:Dietary Proteins; D029941:Fish Proteins; C062121:N-propeptide type I collagen; D010446:Peptide Fragments; D010748:Phosphopeptides; D011347:Procollagen; D015675:Osteocalcin; D003094:Collagen; D000469:Alkaline Phosphatase