Endothelium of the human organ cultured cornea: an electron microscopic study

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L-asparaginase: suppression of the immune response of mice to sheep red blood cells

L-asparaginase was immunosuppressive in mice. A single injection of 1000 I.U. of L-asparaginase markedly suppressed the direct haemolytic plaque forming cell response to immunization with sheep red blood cells. The effect was not due to cytotoxicity but to delayed proliferation of plaque forming cells. Haemagglutinin production was delayed by a single injection and was suppressed when the enzyme was given daily from 3 days before immunization to the day before antiserum collection. L-asparaginase in this dosage form both reduced total antibody production and markedly prolonged 2-ME sensitive antibody production. L-asparaginase treatment was only weakly immunosuppressive and none of the animals studied showed complete suppression of the immune response. It was suggested that asparaginase would be most effective in the prevention of the development of primary immunity when combined with another agent with an independent mechanism of action.

The human primary immune response to keyhole limpet haemocyanin: interrelationships of delayed hypersensitivity, antibody response and in vitro blast transformation

The immune response to a protein antigen, keyhole limpet haemocyanin, was studied in fourteen normal subjects and twenty-one patients with solid tumours. Immunological responsiveness was assessed by intracutaneous skin testing, by haemagglutinin titres and by in vitro blast transformation. No significant difference was found in the kinetics or magnitude of the immune response among subjects immunized with 0·01, 0·10, or 5·0 mg. Delayed hypersensitivity to keyhole limpet haemocyanin developed in thirty-two of thirty-four skin tested; a positive antibody titre occurred in all; and thirty-one of thirty-five had positive in vitro responses. Patients in good general condition (Group 1) had significantly greater delayed hypersensitivity and antibody responses than the normals but similar in vitro responses. All immunological parameters were depressed in the patients with advanced neoplastic disease (Group 2).

Although only skin test positive subjects had positive in vitro responses, no direct correlation was found between the degree of delayed hypersensitivity and the degree of in vitro blast transformation. Excellent correlation was demonstrated, however, between the in vitro response and the haemagglutinin titre (correlation coefficient +0·52, standard error ±0·09).

An associative technique for analyzing the content of Rorschach test responses

The usual methods of Rorschach content analysis used in clinical work are the psychologist's associations, the cookbook approach, and the card as a standard stimulus approach. These methods lead to much speculation in interpretation. An approach is suggested for analyzing content that relies on the patient's associations to his responses. A comparison is made with dream interpretation. This approach was tried with several protocols and the results seem to have a good payoff value.