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. 1971 Jan;121(2):341–347. doi: 10.1042/bj1210341

Mitochondrial development in liver of foetal and newborn rats

S Jakovcic 1, J Haddock 1, G S Getz 1, M Rabinowitz 1, H Swift 1
PMCID: PMC1176575  PMID: 4330092

Abstract

The development of the inner mitochondrial membrane in foetal and neonatal rat liver was studied by following three parameters: (1) the activity of several respiratory enzymes in homogenates and purified mitochondria, (2) the spectrophotometric determination of cytochrome content in the mitochondria and (3) the cardiolipin content in both homogenates and purified mitochondria. Respiratory-enzyme activities of homogenates of foetal liver were one-quarter to one-twentieth of those of homogenates of adult liver, and the enzyme specific activities in purified mitochondria from foetal liver were one-half to one-eighth of those in mitochondria from adult liver. The cardiolipin content of liver homogenates increased approximately twofold during the development period, but there was no significant change in the cardiolipin content of purified mitochondria. It is concluded that cell mitochondrial content approximately doubles in the immediate postnatal period. There was no evidence for an increase in the relative amount of cristae protein in mitochondria during this period to account for increases in mitochondrial enzyme specific activity, since cardiolipin and cytochrome concentrations remained unchanged and electron micrographs revealed no differences. The cause of the lower respiratory-enzyme specific activity in foetal liver mitochondria is unclear. Qualitative differences in respiratory units in foetal and mature animals are suggested.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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