STUDIES ON THE Cx-REACTIVE PROTEIN
نویسندگان
چکیده
Young adult rabbits (2 to 3 kg.) were subjected to a single total body exposure of x-radiation ranging from 50 to 1200 r and tested frequently for the presence of Cx-reactive protein in their blood. It usually appeared in two phases separated by an interval of several days. The primary phase occurred 24 to 48 hours after irradiation in almost all (92 of 97) rabbits exposed to 500 r or more and in 4 of 16 exposed to 300 r or less. The secondary phase occurred during the 2nd week in many of the rabbits irradiated with 900 r or more and in a few irradiated with 700 r. Autopsy cultures failed to demonstrate the presence of infection in rabbits which died or were sacrificed during the primary phase. Bacterial infection was demonstrated, however, in almost all (21 of 24) rabbits autopsied and cultured during the secondary phase. After the disappearance of the primary phase in rabbits exposed to 700 or 900 r, the secondary phase could be elicited by initiating bacterial infection. Within 6 to 24 hours after intravenous inoculation of E. coli, Cx-reactive protein reappeared in the blood and persisted until death or termination of the experiment. Reappearance of the protein also followed the intravenous injection of killed E. coli but it disappeared again 1 to 2 days later. The results indicate that the primary phase is elicited by radiation injury per se and the secondary phase by bacterial infection.
منابع مشابه
THE RELATIONSHIP BETWEEN THE ACUTE PHASE RESPONSE AND ANTIBODY PRODUCTION IN THE RABBIT II. THE STm-t~LATION OF CX-REACTIVE PROTEIN RESPONSE BY CERTAIN ADJUVANTS AND THE RELATION OF THIS RESPONSE TO THE ENHANCE- MENT OF ANTIBODY FORMATION
In the preceding paper it has been shown that a correlation exists between the production of Cx-reactive protein by rabbits in response to the administration of the two antigens, human C-reactive protein and human gamma globulin, and the subsequent production of precipitating antibody in high titer (1, 2). This finding suggested that it would be of interest to investigate the effects of an adju...
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It has been found that some rabbits respond to the administration of either human C-reactive protein or human gamma globulin with the production of an acute phase substance, Cx-reactive protein. A correlation was found to exist between the amount of Cx-protein produced and the subsequent production of significant titers of precipitating antibody to the two antigens employed.
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عنوان ژورنال:
- The Journal of Experimental Medicine
دوره 106 شماره
صفحات -
تاریخ انتشار 1957