Related Experiment Videos
Birth weight has no influence on glomerular number and volume
S E Jones1, J R Nyengaard, A Flyvbjerg
1School of Clinical Medical Sciences, Medical School, Framlington Place, Newcastle upon Tyne NE2 4HH, UK. sue@jones1385.fsnet.co.uk
Pediatric Nephrology (Berlin, Germany)
|May 17, 2001
Summary
Naturally occurring low birth weight (LBW) in rats does not significantly impact kidney development, glomerular number, or volume. This finding suggests LBW may have less influence on renal health than previously thought.
Area of Science:
- Nephrology
- Developmental Biology
- Physiology
Background:
- Low birth weight (LBW) is hypothesized to reduce glomerular number, potentially leading to adult hypertension.
- Animal models of intrauterine malnutrition show reduced glomerular number, but their human relevance is unclear.
Purpose of the Study:
- To investigate if naturally occurring LBW in rats, without in utero manipulation, affects glomerular number, volume, or urine albumin excretion.
- To assess the impact of non-manipulated LBW on renal development.
Main Methods:
- Selected male rats with lowest birth weight (LBW) and near-mean birth weight (NBW) from litters.
- Cross-fostered rats to normalize maternal/nursing effects.
- Assessed glomerular number, mean glomerular volume, and urine albumin excretion using stereological techniques after perfusion fixation.
Main Results:
- No significant differences were found in glomerular number between LBW and NBW rats.
- Mean glomerular volume and urine albumin excretion also showed no significant differences.
- All rats exhibited glomerular numbers within the normal range.
Conclusions:
- Naturally occurring low birth weight in this rat model has minimal impact on renal development.
- Glomerular number and volume appear unaffected by non-manipulated LBW.
- These findings challenge the direct link between naturally occurring LBW and altered renal development.