The effect of infection with Moloney murine leukemia virus (Mo-MuLV) on long-term bone marrow cultures was studied. Cultures were derived from the bone marrow of BALB/Mo mice, which carry Mo-MuLV as an endogenous virus, or from BALB/c, 129/J, or balb/c X 129/J mice that were infected with Mo-MuLV in vitro. The following parameters were tested: longevity of generation of granulocytes; biological...

Because Corynebacterium parvum has tumor-inhibitory properties and stimulates granulocyte-macrophage production, it may have clinical value in combination with chemotherapy. The leukopoietic effect of killed suspensions of C. parvum was studied in mice using the technique of in vitro clonal culture of hematopoietic cells. After C. parvum injection, there was a prompt, sustained elevation of ser...

In murine leukemia virus-induced myeloid leukemias, insertional mutagenesis of the c-myb locus has been shown to occur frequently. Proto-oncogene activation is achieved in most leukemias by integration of murine leukemia virus upstream of exons 3 or 4 or by integration into exon 9 with consequent truncation of the protein. The present study investigates the effect of ectopic expression of full-...

s of the 34th Interscience Conference on Antimicrobial Agents and Chemotherapy. Orlando, FL. Washington, DC, American Society for Microbiology, 1994, p 266 (abstr H76) 148. Masucci G, Wersäll P, Ragnhammar P, Mellstedt H: Granulocytemonocyte-colony-stimulating factor augments the cytotoxic capacity of lymphocytes and monocytes in antibody dependent cellular cytotoxicity. Cancer Immunol Immunoth...

Previously we have shown that the zinc finger transcription factor Egr-1 is essential for and restricts differentiation of hematopoietic cells along the macrophage lineage, raising the possibility that Egr-1 actually plays a deterministic role in governing the development of hematopoietic precursor cells along the monocytic lineage. To test this hypothesis, we have taken advantage of interleuki...

s of the 34th Interscience Conference on Antimicrobial Agents and Chemotherapy. Orlando, FL. Washington, DC, American Society for Microbiology, 1994, p 266 (abstr H76) 148. Masucci G, Wersäll P, Ragnhammar P, Mellstedt H: Granulocytemonocyte-colony-stimulating factor augments the cytotoxic capacity of lymphocytes and monocytes in antibody dependent cellular cytotoxicity. Cancer Immunol Immunoth...

Airway epithelial cells provide an immediate response to bacterial pathogens by producing chemokines and cytokines that recruit polymorphonuclear leukocytes (PMNs) to the site of infection. This response is excessive in patients with cystic fibrosis (CF) who have bacterial contamination of their airways. We postulated that CF airway pathogens, in activating nuclear factor-kappaB-dependent gene ...

background and objectives: during past decades hansenula polymorpha has attracted global attention for the expression of recombinant proteins due to its high growth rate, minimal nutritional porequirements and use of methanol as a low cost inducer. materials and methods: the corresponding nucleotide sequences for the expression of heterologous genes in hansenula poylmorpha were extracted and as...