Acon Digital Multiply Free Download. Acon Digital Multiply Free Download. Watch Now · Download Now · Watch Now · Acon Digital Multiply 1.0.. CPU. x86-64..Immunosurveillance of T-cell proliferation by a resting B-cell lymphoma line.
Mice bearing an EL4 lymphoma tumor were treated with a T-cell stimulating agent, IL-2. After 9 days of IL-2 treatment the tumor tissue contained activated B and T cells. Activated T cells secreted a soluble factor that enhanced the proliferation of a resting murine B lymphoma line, 32D1. Increased proliferation was observed with both 7T2 cells and 32D1 cells in the presence of this T cell-derived soluble factor. The T-derived soluble factor was an IL-1-like molecule as evidenced by its activity in the IL-1-dependent 32D1 B-cell line and its failure to affect B cells from IL-1-deficient mice. The 32D1 B-cell line also showed increased proliferation in the presence of IL-1 beta. The T-derived soluble factor was trypsin-sensitive, heat-labile, a hydrophilic molecule with an apparent molecular weight of 45,000, and was detected in the sera of treated mice and could be partially purified by column chromatography. These results demonstrate that activation of murine B cells by T cells leads to secretion of a soluble factor which is capable of regulating the proliferation of a resting B-cell lymphoma line.Comparison of amikacin and cefotaxime by E. coli disk-diffusion assay.
Amikacin and cefotaxime, two related third-generation cephalosporins, were tested for their in vitro antimicrobial activity against 523 strains of Escherichia coli isolated in 4 Mexican teaching hospitals. A total of 956 E. coli strains were isolated from urinary tract infections, respiratory tract infections, bloodstream infections, and bacteriuria. The strains were obtained from different patients and were isolated between January 1986 and December 1987. All isolates were susceptible to amikacin (MIC, < or = 16 micrograms/ml), cefotaxime (MIC, < or = 16 micrograms/ml), and imipenem (MIC, < or = 2 micrograms/ml). Isolates resistant to cefotaxime 0b46394aab