Toxoplasma gondii

平台编号：Bio-115069

Toxoplasma gondii (Nicolle and Manceaux) Nicolle and Manceaux 拉丁名

ATCC 50941 编号

Deposited AsToxoplasma gondii (Nicolle and Manceaux) Nicolle and Manceaux

Strain DesignationsPTG-GFP 5 S65T

Application 用途

Food and waterborne pathogen research

Opportunistic pathogen research

Biosafety Level 安全等级 2

Biosafety classification is based on U.S. Public Health Service Guidelines, it is the responsibility of the customer to ensure that their facilities comply with biosafety regulations for their own country.

Isolation 分离基物 Derived from strain PTG, ATCC 50841, by transfection

Product Format 冷冻物 frozen

Storage ConditionsFrozen Cultures:

-70°C for 1 week; liquid N2 vapor for long term storage

Freeze-dried 冻干物 Cultures:

2-8°C

Live Cultures:

See Protocols section for handling information

Type Strain 模式菌种 no

GenotypeHaplogroup 2

Comments 

expression of green fluorescent protein

Growth Conditions 培养条件

Temperature 培养温度 : 35°C to 37°C

Cell Line: ATCC CRL-1634 (human foreskin fibroblasts)

CryopreservationHarvest and Preservation

To harvest the Toxoplasma culture, detach any remaining tissue culture cells (infected and uninfected) by scraping the surface of the flask with a cell scraper.

Transfer the cell suspension (including parasites) to 15 mL plastic centrifuge tubes. Centrifuge at 1300 x g for 10 min.

Remove all but 0.5 mL of the supernatant from each tube, resuspend the cell pellets, and pool them to a single tube.

Pass the resulting cell suspension through a syringe equipped with a 27 gauge 1/2 in needle to break up any remaining cells. Adjust the parasite concentration to 2.0 - 4.0 x 107 cells/mL with fresh medium or PBS. NOTE: If the concentration of parasites is too low, centrifuge at 1300 x g for 10 min and resuspend in the volume of fresh medium or PBS required to yield the desired concentration.

Prepare a cryoprotective solution containing 15% (v) DMSO and 50% (v) HIFBS in fresh medium or PBS.

Mix the cell preparation and cryoprotective solution in equal portions. The final concentration will be 1.0 - 2.0 x 107 cells/mL, 7.5% DMSO, and 25% HIFBS. The time from the mixing of the cell preparation and cryoprotective solution to the start of the freezing process should be no less than 15 min. and no more than 30 min. NOTE: To prevent culture contamination, penicillin-streptomycin solution (ATCC 30-2300) may be added to a final concentration of 50 to 100 I.U./mL penicillin and 50 to 100 µg/mL streptomycin.

Dispense in 0.5 mL aliquots to 1.0-2.0 mL sterile plastic screw-capped cryules (special plastic vials for cryopreservation).

Place vials in a controlled rate freezing unit. From room temperature cool at -1°C/min to -40°C. If freezing unit can compensate for the heat of fusion, maintain rate at -1°C/min through heat of fusion. At -40°C plunge ampules into liquid nitrogen. Alternatively, place the vials in a Nalgene 1°C freezing apparatus. Place the apparatus at -80°C for 1.5 to 2 hours and then plunge ampules into liquid nitrogen. (The cooling rate in this apparatus is approximately -1°C/min.)

Store frozen ampules in either the vapor or liquid phase of a nitrogen refrigerator.

To thaw a frozen ampule, place it in a 35°C water bath such that the lip of the ampule remains above the water line. Thawing time is approximately 2 to 3 minutes.  Do not agitate the ampule.  Do not leave ampule in water bath after thawed.

Immediately after thawing, aseptically transfer contents to a T-25 tissue culture flask containing a fresh monolayer of ATCC CRL-1634 cells and 10 mL ATCC 30-2002 with 3% (v) HIFBS.

Outgas the flask for 10 seconds with a 95% air, 5% CO2 gas mixture.

Incubate in a 35-37°C CO2 incubator with the cap screwed on tightly.

Name of Depositor 寄存者 LD Sibley

Special CollectionNCRR Contract

Chain of Custody 来源国家 ATCC <-- LD Sibley <-- K. Kim

References 参考文献

Kim K, et al. Optimized expression of green fluorescent protein in Toxoplasma gondii using thermostable green fluorescent protein mutants. Mol. Biochem. Parasitol. 113: 309-313, 2001. PubMed: 11295185

Barragan A, Sibley LD. Transepithelial migration of Toxoplasma gondii is linked to parasite motility and virulence. J. Exp. Med. 195: 1625-1633, 2002. PubMed: 12070289