To investigate the effect of malnutrition during pregnancy on bone development in rat pups with intrauterine growth restriction (IUGR). IUGR offspring were induced with a 10% low protein diet, while the control group was given a 21% protein diet during pregnancy. Serum biomarkers including bone glutamyl protein (BGP), amino-terminal propeptide of type 1 procollagen (P1NP), cross linked N-telopeptide of type I collagen (NTX), and insulin like growth factor 1 (IGF-1) levels were measured at 7, 21 and 56 d. Left femurs taken at 56 d were used for bone histomorphometry analysis by micro-computed tomography (micro-CT). Compared with the control group, the IUGR group had lower IGF-1 and BGP levels at 7 and 21 d, and higher P1NP and NTX levels at 7 d. The IUGR group had thinner trabecular thickness (Tb.Th), lower trabecular number (Tb.N), and increased trabecular separation (Tb.Sp) at 56 d. The effect of IUGR on bone development may persist after birth.
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