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Updated: Jul 13, 2026
06:58
Culturing and Measuring Fetal and Newborn Murine Long Bones
Published on: April 26, 2019
Intrauterine programming of bone. Part 2: alteration of skeletal structure
S A Lanham1, C Roberts, M J Perry
1Bone and Joint Research Group, Developmental Origins of Health and Disease, University of Southampton, Southampton, SO16 6YD, UK. S.A.Lanham@soton.ac.uk.
Summary
Maternal protein restriction during pregnancy programs offspring bone density and structure, leading to site-specific bone weakness and strength in later life. This highlights the critical role of in utero nutrition in skeletal development.
Area of Science:
- Developmental Biology
- Skeletal Biology
- Nutritional Science
Background:
- Epidemiological studies suggest skeletal development is programmed during intrauterine and early postnatal life.
- Bone mass loss with age may have fetal origins.
- Maternal protein insufficiency during pregnancy is investigated as a factor in programming skeletal health.
Purpose of the Study:
- To investigate the hypothesis that age-related decrease in bone mass has a fetal origin.
- To examine the long-term skeletal consequences of maternal protein restriction during pregnancy in offspring.
- To understand the role of the intrauterine nutritional environment in programming skeletal development.
Main Methods:
- Rat dams were fed either an 18% (control) or 9% (low protein) diet during pregnancy.
- Offspring were studied at various time points from 4 to 75 weeks of age.
- Micro-computed tomography (micro-CT) and mechanical testing were used to assess bone structure, density, and strength.
Main Results:
- At 75 weeks, female offspring of protein-restricted mothers showed thinner, less dense trabeculae in femoral heads and denser trabeculae in vertebrae.
- Femoral necks had closer-packed trabeculae, and tibial midshafts exhibited denser cortical bone.
- Mechanical testing revealed weaker femoral heads and tibiae, but stronger femoral necks and vertebrae in offspring from the low-protein group.
Conclusions:
- Maternal protein restriction during pregnancy significantly alters offspring bone structure, density, and mechanical properties at various skeletal sites.
- These alterations indicate significantly modified bone turnover, supporting the programming of skeletal development by the early nutritional environment.
- Understanding intrauterine nutrition's role is crucial for addressing skeletal health consequences later in life.
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