By Burnet MacFarlane
In 1957 or thereabouts I turned inspired with how immunity might be checked out as a means of Darwinian choice among the circulating lymphoid cells of the physique. The clonal choice concept which grew out of this has been as a rule permitted in precept through immunologists, yet i don't think that its complete implications in terms of pathology haven't begun been commonly learned. In a prior publication, Immunological Surveillance, i've got attempted to use the method of melanoma immunity. it is a primarily related try to examine auto-immune affliction from an identical Darwinian perspective. somebody who makes an attempt to provide applicable basic statements approximately complicated organic and scientific phenomena should have a definite experience of guilt. No organic phenomenon can ever be thoroughly, or perhaps competently, defined. There can, at top, simply be a revolutionary development within the acceptability, the highbrow splendor, or the sensible usefulness of the operating generalizations that may be produced. Any try and write at this interpretative point can simply be disregarded as superficial, pointless, and at risk of be proved fallacious or inappropriate via new advancements. it really is anathema to many reliable expert scientists and their objections are actual enough.
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Additional info for Auto-Immunity and Auto-Immune Disease: A survey for physician or biologist
Auto-immunity and auto-immune disease 9. Semidiagrammatic sketches to indicate the probable shape of molecules of IgG and IgM. Note the flexibility of the molecule in the two configurations of IgG. Position of the combining sites is indicated by thickened line. ) FIG. regarded as a pentamer, held together by disulphide bonds, of a structure closely similar to an IgG molecule. 3. In man there are two antigenic types of light chain, K and A; these are present in a ratio of about 2: I respectively in all individuals.
This has the interesting implication that plasma cells of this specificity are sufficiently common in elderly people to serve occasionally as the initiating cell of the abnormal clone. T and B immune systems Today's central position in immunology of the dichotomy betwe~n T and B immune systems. is a recent development and it is not impossible that it is only a temporary one. For the time being, however, it is of major importance in the understanding of auto-immune disease. For many year:;: it has been known that delayed hypersensitivity reactions, Mantoux reaction to tuberculin for instance, were not associated with antibodies and were referred to as cell-mediated reactions in contrast to Modern immunological theory 49 those dependent on antibody.
Twenty-four hours later the labelled cells had taken on the form of large pyronophil cells with active nucleoli. This strongly suggested that the foreign histocompatibility antigen in the AlB hybrid had stimulated the lymphocytes to enlarge and undergo mitosis. The broad point of view to be adopted can be visualized from this experiment of Gowans. The lymphocyte is basically a carrier of information which will be of value in certain emergency situations. As will emerge when we consider immunological functions more closely, that information may be of many different types, but for the present this diversity may be neglected and we can say that the lymphocyte is capable of two roughly alternative activities.