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http://dx.doi.org/10.4014/kjmb.1401.01001

[Retraction] Effects of Cynanchum wilfordii and Phlomis umbrosa Extracts on Bone Growth and Serum Insulin Like Growth Factor-I  

Kang, Yong Koo (BrainOn Inc.)
Hong, Sang Keun (Panaxan Corp.)
Publication Information
Microbiology and Biotechnology Letters / v.42, no.2, 2014 , pp. 139-144 More about this Journal
Abstract
This study examined the efficacies of Cynanchum wilfordii and Phlomis umbrosa extracts on serum insulin like growth factor-I (IGF-I) and bone growth by raising rats in vivo. C. wilfordii and P. umbrosa extracts significantly increased serum IGF-I by 42% and 22% than the control, respectively. Treatment with ${\alpha}$-amylase when manufacturing these extracts remarkably increased the concentration of IGF-I by 63% and 36% above the control, respectively. This meant that these extracts, especially ${\alpha}$-amylase treated extracts, maintained a higher level of IGF-I secretion in the treated groups. In addition, increases of 6% in femur length were found after 8 weeks of oral administration with these extracts. These results indicate that C. wilfordii and P. umbrosa extracts have beneficial effects on bone growth via IGF-I.
Keywords
Cynanchum wilfordii; Phlomis umbrosa; bone growth; IGF-I; ${\alpha}$-amylase;
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