The expression of tumor-associated antigens on the DBA/2 lymphoma L1210 and three L1210 sublines, each resistant to a different antileukemic agent [guanazole, methylglyoxal-bis(guanylhydrazone), and 4,4-diacetyldiphenylurea-bis(guanylhydrazone)] was investigated by the use of monoclonal hybridoma antibodies. Hybridomas were produced by the fusion of spleen cells from DBA/2 mice immunized with i...

Ehrlich ascites carcinoma is a spontaneous murine mammary adenocarcinoma adapted to ascites form and carried in outbred mice by serial intraperitoneal (i/p) passages. The previous work from our laboratory showed that honey having higher phenolic content was potent in inhibiting colon cancer cell proliferation. In this work, we extended our research to screen the antitumor activity of two select...

Breast cancer is the most common form of noncutaneous malignancy in the United States. Since a plateau seems to have been reached in the efficacy of conventional therapy for this, as well as for other solid tumors, our laboratory has been studying the therapeutic potential of chemoimmunotherapy against the disease. Here we report on attempts to treat autochthonous mammary adenocarcinomas in C3H...

6-Hydroxymethylacylfulvene (HMAF; MGI 114) is a novel semisynthetic antitumor agent derived from the sesquiterpene mushroom toxin illudin S. In vitro cytotoxicity determinations produced IC50 concentrations (concentrations required for 50% inhibition of growth) ranging from 160 nM in sensitive MCF-7 human mammary carcinoma cells to 17 microM in relatively insensitive murine B16 melanoma cells. ...

Oncolytic viruses are known to stimulate the antitumor immune response by specifically replicating in tumor cells. This is believed to be an important aspect of the durable responses observed in some patients and the field is rapidly moving toward immunotherapy. As a further means to engage the immune system, we engineered a virus, vesicular stomatitis virus (VSV), to encode the proinflammatory...

The biological properties of l,4-dimethyl-l,4-diphenyl-2-tetrazene (centrazene), a new anti-neoplastic compound which is not an alkylating agent, were described and compared with those of thioTEPA. Short-term studies demonstrated that both centrazene and thioTEPA inhibited the growth of 72j mammary adenocarcinoma growing in C3H mice. ThioTEPA produced concurrent bone marrow damage, and its effe...

Stimulation of antitumor immune mechanisms is the primary goal of cancer immunotherapy, and accumulating evidence suggests that effective alteration of the host-tumor relationship involves immunomodulating cytokines and also the presence of costimulatory molecules. To examine the antitumor effect of direct in vivo gene transfer of murine interleukin 12 (IL-12) and B7-1 into tumors, we developed...