Biomaterial Database

Immunosuppression by polycyclic aromatic hydrocarbons: a structure-activity relationship in B6C3F1 and DBA/2 mice. 1985

K L White, and H H Lysy, and M P Holsapple

The structure-activity relationship of polycyclic aromatic hydrocarbon-induced immunosuppression was investigated using the antibody-forming cell response to sheep erythrocytes. Ten polycyclic aromatic hydrocarbons were evaluated following 14 days of subchronic exposure in female B6C3F1 mice. Additionally, the immunotoxicity of benzo(a)pyrene and 3 of its congeners was evaluated following acute exposure. The immunosuppression observed following both subchronic and acute exposure was similar to the structure-activity relationship observed for the carcinogenicity of the compounds tested. Anthracene, chrysene, benzo(e)pyrene and perylene did not significantly suppress the antibody-forming cell response compared to the corn oil vehicle controls. Benz(a)anthracene, benzo(a)pyrene, dibenz(a,c)anthracene, and dibenz(a,h)anthracene suppressed the antibody-forming cell response by 55 to 91%. The greatest suppression was observed with the 3-methylcholanthrene and 7,12,-dimethylbenz(a)anthracene. Studies using mice with different susceptibility to aryl hydrocarbon hydroxylase induction demonstrated that susceptible mice (B6C3F1) were not as immunosuppressed following exposure to polycyclic aromatic hydrocarbons as were nonsusceptible mice (DBA/2).

UI	MeSH Term	Description	Entries
D007166	Immunosuppressive Agents	Agents that suppress immune function by one of several mechanisms of action. Classical cytotoxic immunosuppressants act by inhibiting DNA synthesis. Others may act through activation of T-CELLS or by inhibiting the activation of HELPER CELLS. While immunosuppression has been brought about in the past primarily to prevent rejection of transplanted organs, new applications involving mediation of the effects of INTERLEUKINS and other CYTOKINES are emerging.	Immunosuppressant,Immunosuppressive Agent,Immunosuppressants,Agent, Immunosuppressive,Agents, Immunosuppressive
D008815	Mice, Inbred Strains	Genetically identical individuals developed from brother and sister matings which have been carried out for twenty or more generations, or by parent x offspring matings carried out with certain restrictions. All animals within an inbred strain trace back to a common ancestor in the twentieth generation.	Inbred Mouse Strains,Inbred Strain of Mice,Inbred Strain of Mouse,Inbred Strains of Mice,Mouse, Inbred Strain,Inbred Mouse Strain,Mouse Inbred Strain,Mouse Inbred Strains,Mouse Strain, Inbred,Mouse Strains, Inbred,Strain, Inbred Mouse,Strains, Inbred Mouse
D011083	Polycyclic Compounds	Compounds which contain two or more rings in their structure.	Compounds, Polycyclic
D004912	Erythrocytes	Red blood cells. Mature erythrocytes are non-nucleated, biconcave disks containing HEMOGLOBIN whose function is to transport OXYGEN.	Blood Cells, Red,Blood Corpuscles, Red,Red Blood Cells,Red Blood Corpuscles,Blood Cell, Red,Blood Corpuscle, Red,Erythrocyte,Red Blood Cell,Red Blood Corpuscle
D005260	Female		Females
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D000917	Antibody Formation	The production of ANTIBODIES by proliferating and differentiated B-LYMPHOCYTES under stimulation by ANTIGENS.	Antibody Production,Antibody Response,Antibody Responses,Formation, Antibody,Production, Antibody,Response, Antibody,Responses, Antibody
D000921	Antibody-Producing Cells	Cells of the lymphoid series that can react with antigen to produce specific cell products called antibodies. Various cell subpopulations, often B-lymphocytes, can be defined, based on the different classes of immunoglobulins that they synthesize.	Antibody-Producing Cell,Antibody-Secreting Cell,Antibody-Secreting Cells,Immunoglobulin-Producing Cells,Immunoglobulin-Secreting Cells,Antibody Producing Cell,Antibody Producing Cells,Antibody Secreting Cell,Antibody Secreting Cells,Cell, Antibody-Producing,Cell, Antibody-Secreting,Cell, Immunoglobulin-Producing,Cell, Immunoglobulin-Secreting,Cells, Antibody-Producing,Cells, Antibody-Secreting,Cells, Immunoglobulin-Producing,Cells, Immunoglobulin-Secreting,Immunoglobulin Producing Cells,Immunoglobulin Secreting Cells,Immunoglobulin-Producing Cell,Immunoglobulin-Secreting Cell
D013154	Spleen	An encapsulated lymphatic organ through which venous blood filters.
D013329	Structure-Activity Relationship	The relationship between the chemical structure of a compound and its biological or pharmacological activity. Compounds are often classed together because they have structural characteristics in common including shape, size, stereochemical arrangement, and distribution of functional groups.	Relationship, Structure-Activity,Relationships, Structure-Activity,Structure Activity Relationship,Structure-Activity Relationships