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Endocrinology, Vol 114, 1860-1863, Copyright © 1984 by Endocrine Society

ARTICLES

Effect of zinc deficiency on serum somatomedin levels and skeletal growth in young rats

G Oner, B Bhaumick and RM Bala

We have studied potential mechanisms by which zinc deficiency (ZD) may result in growth impairment in young animals. Dietary-induced ZD in young rats resulted in diminished skeletal growth as measured by tibial epiphyseal width. Treatment with bovine GH (bGH) did not increase skeletal growth suggesting GH resistance rather than GH deficiency in zinc-deficient rats. Serum levels of basic somatomedin (SM) were lower in zinc-deficient rats than in control rats receiving a zinc adequate diet, either ad libitum or in pair matched amounts, and were restored to normal by zinc repletion but not by bGH treatment, suggesting that SM production is impaired by ZD. There was a high correlation between tibial epiphyseal widths and serum or femur zinc concentrations. These findings, along with observations that despite similar levels of serum basic SM the bGH-treated zinc-deficient rats had smaller tibial epiphyseal widths than pair fed control rats, additionally suggest that the action of SM on skeletal growth is impaired by ZD.




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Copyright © 1984 by The Endocrine Society