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. 1970 Jul;103(1):62–70. doi: 10.1128/jb.103.1.62-70.1970

Lipid Composition of Chlamydia psittaci Growth in Monkey Kidney Cells in Defined Medium

S Makino 1, H M Jenkin 1, H M Yu 1, D Townsend 1
PMCID: PMC248039  PMID: 4987309

Abstract

The lipid compositions of (i) monkey kidney (MK-2) cells cultivated in Eagle's minimal essential medium (MEM) with 5% calf serum, (ii) MK-2 cells cultivated in Waymouth medium supplemented with 20 μg of sodium oleate and 2 mg of bovine albumin per ml, (iii) Chlamydia psittaci strain 6BC grown in the latter host system, and (iv) calf serum were compared. Strain 6BC contains 31% phosphatidyl ethanolamine (PE) and 15% phosphatidyl glycerol (PG), whereas the host cell contains almost the same amount of PE (27%) and no PG. A high concentration of total lipid was observed in strain 6BC (29 to 34%), whereas MK-2 cells contain only 9 to 15% and calf serum contains 4.5% total lipid. The fatty acids of the total lipid from strain 6BC contain branched-chain acids. These fatty acids were found mostly in PE (33.0%) and PG (37.0%). No branched-chain fatty acid was found in the MK-2 cells. There was an increase in triglyceride content when MK-2 cells cultivated in MEM (19.2%) were compared with cells cultivated in Waymouth medium (28.0%). A high concentration (62.0%) of octadecenoic acid (C18:1) was found in the triglyceride of MK-2 cells cultivated in Waymouth medium. The level of polyunsaturated fatty acids observed in MK-2 cells cultivated in Waymouth medium (10.8%) and in the chlamydiae grown in these cells (13.3%) was low compared with the level in MK-2 cells (28.8%) cultivated in MEM with 5% calf serum and the level in calf serum itself (50.8%). A higher ratio of sterol ester to free sterol was found in calf serum than in MK-2 cells or in chlamydiae. Host contribution to lipid composition of strain 6BC is discussed.

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Selected References

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