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Main sol. 1555

Internal Solution-ID: S3212

1 Cultivation of IRE11 cells for infection with Rickettsia monacensis :
2 Alterations were made to the following reagents:
3 L15C (Modified Leibovitzs' L15) used to culture host cells (IRE11). L15C medium is a modification of L15B medium, previously described in detail (Munderloh UG, Kurtti TJ. 1989. Formulation of medium for tick cell culture. Exp. Appl. Acarol. 7:219-29).
Compound Amount Unit Conc. [g/L] Conc. [mM]
L-Aspartic acid 0.4485 g/L 0.449 3.37
L-Glutamine 0.5000 g/L 0.5 3.421
L-Proline 0.4500 g/L 0.45 3.909
L-Glutamic acid 0.2500 g/L 0.25 1.699
alpha-ketoglutaric acid 0.4485 g/L 0.449 3.07
D-Glucose 18.0180 g/L 18.018 100.011
NaOH 5.0000 mM 0.2 5
4 Prior to use in supplemented medium, L15C was diluted by the addition of 33 % water by volume.
5 Supplemented L15C medium is used with
Fetal bovine serum 10.0000 % 100 -
Tryptose-phosphate broth 5.0000 % 50 -
lipoprotein concentrate
(LPC; MPBiomedical)
0.1000 % 1 -
HEPES 25.0000 mM 5.958 25
NaHCO3 0.2500 % 2.5 29.759
6 The pH is adjusted to pH 7.5 using 1 M NaOH.
7 This medium and the cultivation of tick cells is described in the "Basic Tick Cell Culture Methods" provided as pdf-file (see strain entry for DSM 29017: cultivation conditions) by Tim Kurtti & Uli Munderloh, University of Minnesota.
8 Infection with Rickettsia monacensis or R. buchneri : One 25 cm2 flask of well-grown cells is infected with 1 ml of the Rickettsia strain (quickly thawed from -80°C ) and centrifuged for 1 h onto the cell layer at 1600 rpm at 20°C . Incubate at 30°C with closed lid (without CO2) and look for bacteria and destroyed cells after 4-6 days .
1555 Medium for tick cells (Rickettsia)