Antitumor and immunotherapeutic effects of activated invasive T lymphoma cells that display short-term interleukin 1alpha expression.

Expression of cytokines in malignant cells represents a novel approach for therapeutic treatment of tumors. Previously, we demonstrated the immunostimulatory effectiveness of interleukin 1alpha (IL-1alpha) gene transfer in experimental fibrosarcoma tumors. Here, we report the antitumor and immunotherapeutic effects of short-term expression of IL-1alpha by malignant T lymphoma cells.

Process-scale purification of immunoglobulin M concentrate.

An IgM concentrate was purified from Cohn fraction III. Efficiency of euglobin precipitation was shown to be controlled by pH and ionic strength. Prekallikrein activator activity in the product was insignificant.

Virucidal efficacy of saturated intermediate length straight-chain alcohols in biologically active protein solutions.

Manufacturing processes for therapeutic products derived from recombinant DNA and hybridoma technology have required a re-assessment of the parameters traditionally applied for inactivation of endogenous viruses. Historically, time, temperature and concentration of the virucidal agent were the variables considered, whereas pH and ionic environment were restricted by physiological concerns to neutral pH and isotonic buffered solutions. Newer processes are less restrictive of pH and ionic environment, and this has permitted exploration of a wider range of virucidal agents and conditions.