Skip to main content
Biochemical Journal logoLink to Biochemical Journal
. 1972 Aug;128(5):1303–1309. doi: 10.1042/bj1281303

Fatty acid biosynthesis in rabbit mammary gland during pregnancy and early lactation

Christopher R Strong 1, Raymond Dils 1
PMCID: PMC1174018  PMID: 4643704

Abstract

The pattern of fatty acids synthesized by mammary-gland explants from rabbits during pregnancy and early lactation has been studied. From day 12 to day 18 of pregnancy, long-chain (C14:0–C18:1) fatty acids were the major products. From day 18 to day 21 of pregnancy there was an increase of up to 12-fold in the rate of fatty acid synthesis per unit wet weight of tissue that was almost exclusively caused by the synthesis of octanoic fatty acid and decanoic fatty acid, which are characteristic of rabbit milk. These medium-chain fatty acids were mainly incorporated into triglycerides. From day 22 to day 27 of pregnancy there was little change in the rate of fatty acid synthesis and the proportions of fatty acids synthesized were essentially the same as those synthesized by the lactating gland, i.e. 80–90% octanoic acid plus decanoic acid. About 2–4 days before parturition a second lipogenic stimulus occurred, although the pattern of fatty acids synthesized did not change.

Full text

PDF
1303

Selected References

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

  1. Bousquet M., Fléchon J. E., Denamur R. Aspects ultrastructuraux de la glande mammaire de lapine pendant la lactogénèse. Z Zellforsch Mikrosk Anat. 1969;96(3):418–436. [PubMed] [Google Scholar]
  2. Carey E. M., Dils R. Fatty acid biosynthesis. V. Purification and characterisation of fatty acid synthetase from lactating-rabbit mammary gland. Biochim Biophys Acta. 1970 Sep 8;210(3):371–387. doi: 10.1016/0005-2760(70)90033-0. [DOI] [PubMed] [Google Scholar]
  3. Carey E. M., Dils R. Fatty acid biosynthesis. VI. Specificity for termination of fatty acid biosynthesis by fatty acid synthetase from lactating-rabbit mammary gland. Biochim Biophys Acta. 1970 Sep 8;210(3):388–399. doi: 10.1016/0005-2760(70)90034-2. [DOI] [PubMed] [Google Scholar]
  4. Carey E. M., Dils R. The pattern of fatty acid synthesis in lactating rabbit mammary gland studied in vivo. Biochem J. 1972 Feb;126(4):1005–1007. doi: 10.1042/bj1261005. [DOI] [PMC free article] [PubMed] [Google Scholar]
  5. Cowie A. T. Variations in the yield and composition of the milk during lactation in the rabbit and the galactopoietic effect of prolactin. J Endocrinol. 1969 Jul;44(3):437–450. doi: 10.1677/joe.0.0440437. [DOI] [PubMed] [Google Scholar]
  6. DENAMUR R. [Nucleic acids of the mammary gland during gestation and lactation in the rabbit]. C R Hebd Seances Acad Sci. 1963 May 27;256:4748–4750. [PubMed] [Google Scholar]
  7. DENAMUR R. [Study of the mammary gland of the rabbit during gestation and lactation]. Ann Endocrinol (Paris) 1961 Sep-Oct;22:768–776. [PubMed] [Google Scholar]
  8. Gul B., Dils R. Enzymic changes in rabbit and rat mammary gland during the lactation cycle. Biochem J. 1969 Apr;112(3):293–301. doi: 10.1042/bj1120293. [DOI] [PMC free article] [PubMed] [Google Scholar]
  9. Hartmann P. E., Jones E. A. Variations in the activity of several enzymes in the mammary glands of non-pregnant, pregnant and lactating rabbits. Biochem J. 1970 Feb;116(4):657–661. doi: 10.1042/bj1160657. [DOI] [PMC free article] [PubMed] [Google Scholar]
  10. Heitzman R. J. Enzymes of lactose biosynthesis in normal and hormonally stimulated rabbit mammary glands. J Endocrinol. 1968 Jan;40(1):81–84. doi: 10.1677/joe.0.0400081. [DOI] [PubMed] [Google Scholar]
  11. Nandedkar A. K., Kumar S. Biosynthesis of fatty acids in mammary tissue. II. Synthesis of butyrate in lactating rabbit mammary supernatant fraction by the reversal of beta-oxidation. Arch Biochem Biophys. 1969 Nov;134(2):563–571. doi: 10.1016/0003-9861(69)90318-x. [DOI] [PubMed] [Google Scholar]
  12. POPJAK G., HUNTER G. D., FRENCH T. H. Biosynthesis of milk-fat in the rabbit from acetate and glucose; the mode of conversion of carbohydrate into fat. Biochem J. 1953 May;54(2):238–247. doi: 10.1042/bj0540238. [DOI] [PMC free article] [PubMed] [Google Scholar]
  13. SMITH S., DILS R. FACTORS EFFECTING THE CHAIN-LENGTH OF FATTY ACIDS SYNTHESISED BY LACTATING-RABBIT MAMMARY GLANDS. Biochim Biophys Acta. 1964 Dec 2;84:776–778. doi: 10.1016/0926-6542(64)90044-7. [DOI] [PubMed] [Google Scholar]
  14. Smith S., Abraham S. Fatty acid synthetase from lactating rat mammary gland. II. Studies on the termination sequence. J Biol Chem. 1971 Apr 25;246(8):2537–2542. [PubMed] [Google Scholar]
  15. Smith S., Dils R. Factors affecting the chain length of fatty acids synthesised by lactating-rabbit mammary glands. Biochim Biophys Acta. 1966 Feb 1;116(1):23–40. doi: 10.1016/0005-2760(66)90089-0. [DOI] [PubMed] [Google Scholar]
  16. Smith S., Watts R., Dils R. Quantitative gas-liquid chromatographic analysis of rodent milk triglycerides. J Lipid Res. 1968 Jan;9(1):52–57. [PubMed] [Google Scholar]
  17. Strong C. R., Forsyth I., Dils R. The effects of hormones on milk-fat synthesis in mammary explants from pseudopregnant rabbits. Biochem J. 1972 Jul;128(3):509–519. doi: 10.1042/bj1280509. [DOI] [PMC free article] [PubMed] [Google Scholar]

Articles from Biochemical Journal are provided here courtesy of The Biochemical Society

RESOURCES