Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0220723 (PCA)
 4,687 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

The present studies were undertaken to clarify the immunogenicity evoked in four species, the guinea pig, rabbit, F344 rat and A/J mouse, immunized with a low-molecular antigen (TNBS) alone, TNBS plus Alum and TNBS plus FCA. Each species was divided into three groups: TNBS alone sc group, TNBS plus Alum ip groups (one and 3 times sensitization) and TNBS plus FCA sc groups (one and 3 times sensitization), and immune responses to TNBS were estimated by the assay systems of humoral immunoreactions (HA.PCA.SANA.Arthus) and cellular immunoreaction (DTH by the intracutaneous method & application method). All of the species showed significantly positive humoral immune responses in the TNBS alone sc group, the TNBS plus Alum ip groups and in the TNBS plus FCA sc groups. Nearly all of the guinea pigs and rabbits displayed positive cellular immune response (DTH by the intracutaneous method), while such immune response was never recognized in the rat groups. These results suggest that TNBS is a useful model compound as a positive control for the antigenicity tests of novel drugs.
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PMID:[Immunogenicity studies in experimental animals immunized with a low-molecular antigen alone and the antigen plus adjuvants]. 157 41

The present study was carried out using a low-molecular antigen to clarify which of the two IgG subclasses (IgG1 and IgG2) of guinea pigs is responsible for the immunological assay systems in ordinary antigenicity tests for the development of a novel drug, and to what extent such IgG subclass antibodies contribute to the assay systems in addition to IgM antibody. Guinea pigs were immunized with TNBS plus FCA (3 mg/body), at intervals of 10 days, 3 times in total. The anti-TNBS serum was fractionated into peak I (IgG2), peak II (IgG1) and peak IV (IgM) by DEAE-cellulose column chromatography, and the immunological activities as well as the functions of the above three peaks were estimated by HA, homologous PCA reaction, PSANA and P-Arthus. The IgM and two IgG peaks possessed immunological activities on HA and P-Arthus, and the following degree of activities was shown in both assay systems: peak II (IgG1) greater than peak IV (IgM) greater than peak I (IgG2). In the homologous PCA reaction and PSANA, immunological activities were seen only in peak II (IgG1). It is confirmed that the IgG1 subclass is a homocytotropic antibody involved in the PCA and PSANA assay systems in the case of low-molecular immunogens such as TNBS.
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PMID:[Comparison of immunological activities of guinea pig IgG1 and IgG2 antibodies to low-molecular antigen]. 183 42

It appears to be significant for the analytical studies of drug allergy that a comparison is made among inbred strains of mice, with different H-2 haplotypes with respect to the antibody response to low-molecular compounds. Such studies have been demonstrated by several investigators using high-molecular antigens, such as the synthetic polypeptides and natural proteins. The present experiments were undertaken, therefore, to clarify the differences in antibody responses to a low-molecular compound, TNBS in inbred strains of mice. Mice of four different strains, A/J (H-2a), C57BL/6 (H-2b), DBA/2 (H-2d) and C3H/He (H-2k) were immunized with TNBS (30 & 300 micrograms/body) plus FCA by the routes of ip or sc. Responses of IgG and IgE antibody productions were estimated by HA in serum samples treated with 2-ME and rat PCA reaction in untreated serum samples, respectively. As the results, DBA/2 (H-2d) mice showed high responses on IgE antibody production whereas C3H/He (H-2k) mice on IgG antibody production. A/J (H-2a) mice displayed high responses both on IgG and IgE antibody productions. C57BL/6 (H-2b) mice denoted low to intermediate responses both on IgG and IgE antibody productions. The above phenomenon may be interpreted by the fact that H-2a haplotype of A/J mice has a crossover on K region-E alpha subregion of H-2k and S.D regions of H-2d.
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PMID:[Differences in IgG and IgE antibody responses to a low-molecular compound in inbred strains of mice]. 205 60

The effects of (+/-)-2-[p-(2-thenoyl)phenyl] propionic acid (suprofen), a new anti-inflammatory agent, on experimental allergic reaction and antibody formation were examined. The action was compared with those of ketoprofen, ibuprofen, indomethacin, tranilast, chlorpheniramine, prednisolone and/or cyclophosphamide. Suprofen inhibited homologous PCA in rats, immunological histamine release from rat peritoneal mast cells and guinea pig lung tissues, Forssman cutaneous vasculitis (FCV) and the Arthus reaction in guinea pigs. The potency for inhibition of the PCA reaction was similar to that of ketoprofen and more potent than ibuprofen and trailast. As for the release of anaphylactic mediators, suprofen was less potent than tranilast in terms of histamine release, but not the release of the slow reacting substance of anaphylaxis (SRS-A). Suprofen inhibited FCA more potently than other nonsteroidal anti-inflammatory drugs (NSAID). The inhibition of the Arthus reaction by suprofen was similar to those of other NSAID and prednisolone. Suprofen hardly affected delayed hypersensitivity in guinea pigs and antibody (IgM or IgE) formation in mice or rats.
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PMID:Effect of (+/-)-2-[p-(2-thenoyl)phenyl] propionic acid (suprofen) on experimental allergic reactions. 614 45

Studies on antigenicity of suloctidil were performed on ASA, Schultz-Dale reaction, PCA and PHA in guinea pigs. Two sensitizing procedures were enforced. One was performed by means of treatment of suloctidil (p. o. and i. p.) and the other was done by means of injection of suloctidil, suloctidil-BSA-mixture and suloctidil-BSA-conjugate emulsified with FCA. Guinea pigs treated with suloctidil by oral or intraperitoneal administration showed no ASA, Schultz-Dale reaction, PCA and PHA by the challenge of suloctidil. The animals treated with suloctidil-BSA-conjugate only evoked severe anaphylactic reaction to challenge of suloctidil-OVA-conjugate. Guinea pigs treated with suloctidil and suloctidil-BSA-mixture showed no anaphylactic reaction to challenge of suloctidil, suloctidil-OVA-mixture and suloctidil-OVA-conjugate. The animals sensitized with suloctidil-BSA-conjugate showed no anaphylactic reaction to challenge of suloctidil and suloctidil-OVA-mixture. Therefore, it is concluded that suloctidil does not have any antigenicity.
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PMID:[Antigenicity of suloctidil]. 631 26

Antigenicity of calcipotriol (MC903), an anti-psoriasic agent, was investigated in mice and guinea-pigs. 1. In mice, MC903 administered alone or with an adjuvant (Alum) did not result in the production of MC903-specific IgE antibody. 2. In guinea-pigs sensitized with MC903 alone or plus an adjuvant (FCA), systemic anaphylaxis was not induced by challenging with MC903. IgG1 antibody in MC903-sensitized guinea-pigs was not detected by the 4-hr PCA test. 3. Ovalbumin induced the production of ovalbumin-specific IgE antibody in mice, and ovalbumin-specific IgG1 antibody in guinea-pigs. Intense systemic anaphylaxis in the ovalbumin-sensitized guinea-pigs was induced by challenging with ovalbumin. 4. Results obtained in the present study suggest that MC903 does not induce the production of IgE antibody in mouse, and IgG1 antibody in guinea-pig, and in MC903-sensitized guinea-pig systemic anaphylaxis is not induced by challenging with MC903.
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PMID:[An antigenicity study of calcipotriol (MC903)]. 874 25