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<em>Toxoplasma gondii</em> (Nicolle and Manceaux) Nicolle and Manceaux

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編號:B231094

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產品名稱	Toxoplasma gondii (Nicolle and Manceaux) Nicolle and Manceaux
商品貨號	B231094
Deposited As	Toxoplasma gondii (Nicolle and Manceaux) Nicolle and Manceaux
Strain Designations	PTG [PLK]
Application	Food and waterborne pathogen research Opportunistic pathogen research
Biosafety Level	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	High passage line, cloned from ME49
Product Format	frozen
Storage Conditions	Frozen Cultures: -70°C for 1 week; liquid N₂ vapor for long term storage Freeze-dried Cultures: 2-8°C Live Cultures: See Protocols section for handling information
Type Strain	no
Genotype	Haplogroup 2
Comments	Clonal lineage RFLP linkage map
Growth Conditions	Temperature: 35°C to 37°C Cell Line: ATCC^® CRL-1634™ (human foreskin fibroblasts) (Contact ATCC Sales to order)
Subcultivation	Protocol: with serum reduced to 3%
Cryopreservation	Harvest 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/v) DMSO and 50% (v/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/v) HIFBS. Outgas the flask for 10 seconds with a 95% air, 5% CO₂gas mixture. Incubate in a 35-37°C CO₂ incubator with the cap screwed on tightly.
Name of Depositor	LD Sibley
Special Collection	NCRR Contract
Chain of Custody	ATCC <-- LD Sibley <-- J.C. Boothroyd <-- L. Kasper
References	Howe DK, Sibley LD. Toxoplasma gondii: analysis of different laboratory stocks of the RH strain reveals genetic heterogeneity. Exp. Parasitol. 78: 242-245, 1994. PubMed: 7907030 Sibley LD, et al. Generation of a restriction fragment length polymorphism linkage map for Toxoplasma gondii. Genetics 132: 1003-1015, 1992. PubMed: 1360931 Howe DK, Sibley LD. Toxoplasma gondii comprises three clonal lineages: correlation of parasite genotype with human disease. J. Infect. Dis. 172: 1561-1566, 1995. PubMed: 7594717 Sibley LD, Boothroyd JC. Virulent strains of Toxoplasma gondii comprise a single clonal lineage. Nature 359: 82-85, 1992. PubMed: 1355855 Howe DK, et al. Acute virulence in mice is associated with markers on chromosome VIII in Toxoplasma gondii. Infect. Immun. 64: 5193-5198, 1996. PubMed: 8945565 Howe DK, et al. Determination of genotypes of Toxoplasma gondii strains isolated from patients with toxoplasmosis . J. Clin. Microbiol. 35: 1411-1414, 1997. PubMed: 9163454 Mordue DG, et al. Acute toxoplasmosis leads to lethal overproduction of Th1 cytokines. J. Immunol. 167: 4574-4584, 2001. PubMed: 11591786 Su C, et al. Identification of quantitative trait loci controlling acute virulence in Toxoplasma gondii. Proc. Natl. Acad. Sci. USA 99: 10753-10758, 2002. PubMed: 12149482 Mordue DG, et al. Invasion by Toxoplasma gondii establishes a moving junction that selectively excludes host cell plasma membrane proteins on the basis of their membrane anchoring. J. Exp. Med. 190: 1783-1792, 1999. PubMed: 10601353 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 Asai T, et al. Biochemical and molecular characterization of nucleoside triphosphate hydrolase isozymes from the parasitic protozoan Toxoplasma gondii. J. Biol. Chem. 270: 11391-11397, 1995. PubMed: 7744775 Sibley LD, et al. Genetic approaches to studying virulence and pathogenesis in Toxoplasma gondii. Philos. Trans. R. Soc. Lond. B Biol. Sci. 357: 81-88, 2002. PubMed: 11839185 L D Sibley, personal communication

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