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Biomedical subjects

P Kallós

Publications and source records attributed to P Kallós.

18 recordsLinked to original sources
PubMed1984

Experimental asthma in guinea pigs revisited.

Experimental asthma in guinea pigs, as defined in 1937 by Kallós and Pagel, and the pertinent literature are reviewed. The relation between guinea pig asthma and human asthma bronchiale is established. The underlying mechanism in both processes is the misdirected (aberrant) formation of anaphylactic or reaginic (IgE) antibody against innocuous antigens, leading at renewed exposure to the antigen to release of mast cell mediators (such as histamine, SRS-A, eosinotactic peptides, PAF), bronchoconstriction, vasodilation and eosinophilic inflammation at the sites of antigen-antibody reactions in the tissues of the respiratory organs.

Anaphylaxis↗
PubMed1982

Plasma carboxypeptidase activity and intolerance to acetylsalicylic acid unimpaired CP-N activity in ASA-intolerant individuals.

Carboxypeptidase N (EC 3.4.17.3, arginine carboxypeptidase, kininase, anaphylatoxin inactivator) activity was determined in human sera with the method of Erdös by differential spectrometry at 254 nm and 37 degrees C, using hippuryl-L-argininic acid (HLAa) as a substrate. Day-to-day imprecision (CV) of the assay was 6.5%. The reference value, as determined in 15 healthy blood donors, was 3,082 +/- 432 IU/1. The mean value in a pool of sera from 12 healthy pregnant women, 4,500 +/- 294 IU/1, was higher in accordance with earlier findings by Erdös et al. Sera from 53 patients with chronic asthma or chronic urticaria, without known acetylsalicylic acid (ASA) intolerance, gave the mean value of 3,583 +/- 768 IU/1, and those from 17 patients with chronic asthma or chronic urticaria and ASA intolerance 3,379 +/- 575 IU/1. Thus, the carboxypeptidase-N activity in the blood of ASA-intolerant asthmatics and urticaria patients was unimpaired. A 16-year-old boy with asthma and without ASA intolerance showed an unusually low value of 2,056 IU/1.

Aspirin↗
PubMed1980

The pathomechanism of acetylsalicylic acid intolerance. A hypothesis.

In a number of individuals suffering from chronic asthma or chronic urticaria, acetylsalicylic acid and structurally unrelated non-steroidal anti-inflammatory agents and other compounds, e.g. tartrazine, elicit an intolerance syndrome that mimics the signs and symptoms of an immediate-type allergic (anaphylactic) reaction. An immunological basis for this reaction could be excluded. It is assumed that the eliciting agents activate complement and that the intolerant individuals lack plasma carboxypeptidase B, that normally inactivates C3a and C5a in statu nascendi. The anaphylatoxins, if not immediately inactivated, release the endogenous mediators of the anaphylactic reaction from the tissue mast cells.

Aspirin↗
PubMed1976

[Immunobiology of tuberculosis].

R. Koch showed in 1882 in his so-called fundamental experiment that tuberculous guinea pigs exhibit a vigorous immunity against re-infection. In investigations in 1930--40 we showed that this immunity is not mediated by humoral antibodies. It is a cellular process, a local and general activation of the macrophage system (the system of mononuclear phagocytes). The tuberculous granuloma consists of activated macrophages and their descendants (epitheloid and giant cells), which inhibit the growth and spreading of tubercle bacilli. The role of the specific and unspecific activation of the macrophage system could be demonstrated in experiments on rats, infected with Bartonella muris ratti. These early results are related to the recent knowledge concerning cellular immunity and granulomatous inflammation, especially to the cooperation between the lymphatic and macrophage system.

Anaplasmataceae↗
PubMed1976

Flour allergy in bakers. I. Identification of allergenic fractions in flour and comparison of diagnostic methods.

Extract of wheat flour obtained by extraction, centrifugation and dialysis was immunochemically characterized by quantitative immunoelectrophoresis using rabbit antibodies. The analysis revealed wheat flour to be composed of 40 antigens, some of which were immunologically partially identical with antigens of rye flour and of common grass pollen. Furthermore, antigens of the gliadin fraction of wheat flour were identified. 25 bakers with allergic complaints working in and around Copenhagen were clinically tested with wheat flour and related extracts. Among 13 bakers with respiratory complaints (asthma and/or rhinitis), 11 showed positive reactions to wheat flour extract when tested in histamine release from basophil leukocytes radioallergosorbent test and skin test, whereas further 2 were positive in the basophil test only. The ability of the IgE of individual sera to adsorb to the individual antigens of wheat flour was examined by means of crossed radioimmunoelectrophoresis. On the basis of these results, individual allergenic components of wheat flour were identified, three of these with comparatively high affinity and frequency.

Antigens↗